WO2015109585A1 - 一种用户设备、基站及小区发现的方法 - Google Patents
一种用户设备、基站及小区发现的方法 Download PDFInfo
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- WO2015109585A1 WO2015109585A1 PCT/CN2014/071520 CN2014071520W WO2015109585A1 WO 2015109585 A1 WO2015109585 A1 WO 2015109585A1 CN 2014071520 W CN2014071520 W CN 2014071520W WO 2015109585 A1 WO2015109585 A1 WO 2015109585A1
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- Prior art keywords
- neighboring cell
- reference signal
- cell
- resource
- neighboring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0466—Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Definitions
- the present invention relates to the field of communications, and in particular, to a method for discovering user equipment, a base station, and a cell.
- the traditional Long Term Evolution (LTE) wireless network is generally considered to be composed of macro base stations. Since the macro base station has a erection height of more than 20 meters and a transmission power of 46 dBm, it can cover a large area and serve many users. .
- LTE Long Term Evolution
- the UE In an LTE network, there are many cells (cells). In general, there is one base station (macro base station or micro base station or small base station) in a small area.
- the UE establishes a connection with a certain base station to receive the service provided by the base station; as the UE moves, it may leave one cell and enter another cell. In this way, the UE needs to disconnect from the original base station, establish a connection with the base station of the newly arrived cell, and serve the base station of the newly arrived cell. Such a process is called switching.
- the cell discovery means that the UE determines whether there are other cells in the vicinity of the cell that is being connected, and the UE detects the primary synchronization signal sent by the neighboring cell ( Primary Synchronization Signal (PS S) / Secondary Synchronous Signal (SSS), which acquires the cell identity (ID, ID) of the neighboring cell.
- PS S Primary Synchronization Signal
- SSS Secondary Synchronous Signal
- ID, ID cell identity of the neighboring cell.
- the cell measurement refers to the downlink reference sent by the neighboring cell detected by the UE.
- the small base stations are mainly deployed in densely populated places, and the small base stations are also deployed intensively to meet the demand for communication data.
- the intensity may be several meters or more than a dozen meters to arrange two adjacent small base stations.
- cell discovery and measurement are performed according to the prior art. Since each cell transmits the PS S/SSS and the CRS in the same location, the cells in the cell discovery and measurement process cause interference between the cells. Larger. Summary of the invention
- a user equipment including
- a receiving unit configured to receive the auxiliary information, where the auxiliary information includes resource information of the second reference signal of the first neighboring cell, where the first neighboring cell is any neighboring cell of the serving base station of the UE;
- a synchronization unit configured to detect, according to the auxiliary information received by the receiving unit, a first reference signal of the first neighboring cell, so that the UE synchronizes with the first neighboring cell;
- An acquiring unit configured to detect, according to the auxiliary information received by the receiving unit, a first reference signal of the first neighboring cell, or detect a second reference signal of the first neighboring cell, or detect the first neighboring cell First reference signal and second reference signal Taking the cell ID or virtual ID of the first neighboring cell.
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the resource information of the second reference signal of the first neighboring cell includes the following information. At least one of:
- the first reference signal is a PS S of the first neighboring cell or a PSS of the first neighboring cell;
- the generated root sequence number of the PSS is different from the generated root sequence number of the PSS.
- the first reference signal and the second reference signal are quasi-co-sited.
- the synchronization The unit is specifically used,
- the obtaining The unit is specifically used,
- the acquiring unit is specifically configured to:
- the second reference signal sequence of the first neighboring cell is correlated with the M local second reference signal sequences to obtain a scrambling code ID of the second reference signal of the first neighboring cell.
- the second correlation value is greater than the preset discovery condition, the first neighboring cell is found; where the second correlation value is the second reference signal of the detected first neighboring cell respectively
- the M local second reference signal sequences perform any one of the M correlation values obtained by the correlation operation.
- the auxiliary information further includes: a cell ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- the auxiliary information further includes: a scrambling code ID of the second reference signal of the first neighboring cell.
- the determining unit is specifically configured to:
- the fourth correlation value is greater than a preset discovery condition, the first neighboring cell is found.
- the synchronization unit is specifically used,
- first reference signal of the first neighboring cell and the second reference signal of the first neighboring cell are sent in one subframe, in a subframe indicated by resource information of the second reference signal of the first neighboring cell Detecting a first reference signal of the first neighboring cell;
- the second reference in the first neighboring cell is detected by the subframe 0 or the subframe 5 before or after the subframe indicated by the resource information of the signal; wherein, the N is greater than or equal to 1; or,
- the auxiliary information further includes: the first part of the first neighboring cell a subframe offset P of the reference signal from the second reference signal of the first neighboring cell; detecting the Pth subframe before or after the subframe indicated by the resource information of the second reference signal of the first neighboring cell a first reference signal of the first neighboring cell; wherein, the P is greater than or equal to 1.
- the user equipment further includes
- a measuring unit configured to perform RRM measurement of the first neighboring cell at a sending resource location of a second reference signal of the first neighboring cell according to resource information of a second reference signal of the first neighboring cell, and obtain a measurement
- the measurement quantity includes at least one of RSRP, RS SI, and RSRQ.
- the auxiliary information further includes: resource information of the measurement resource 1 of the first neighboring cell;
- the resource information of the measurement resource 1 of the first neighboring cell includes at least one of the following information:
- the resource configuration of the measurement resource 1 of the first neighboring cell, the number of antenna ports of the measurement resource 1 of the first neighboring cell, and the subframe information of the measurement resource 1 of the first neighboring cell is the resource configuration of the measurement resource 1 of the first neighboring cell, the number of antenna ports of the measurement resource 1 of the first neighboring cell, and the subframe information of the measurement resource 1 of the first neighboring cell.
- the measurement resource one of the first neighboring cell is a zero power channel of the first neighboring cell Zero Power Channel State Indication RS (ZP-CSI-RS)
- the measuring unit is specifically configured to:
- the RRM measurement of the first neighboring cell is performed by the sending resource location of the second reference signal of the neighboring cell, and the measured quantity RSRP is obtained;
- a base station is provided, where the base station is a serving base station of a UE, and the base station includes
- An acquiring unit configured to acquire a first reference signal sending parameter of the first neighboring cell and a sending parameter of the second reference signal
- a generating unit configured to generate auxiliary information according to a sending parameter of the first reference signal of the first neighboring cell and a sending parameter of the second reference signal acquired by the acquiring unit, where the auxiliary information includes the first Resource information of the second reference signal of the neighboring cell;
- a sending unit configured to send the auxiliary information generated by the generating unit to the UE in the cell, so that the UE performs cell discovery.
- the second reference signal of the first neighboring cell is an NZP-CSI-RS or the first neighbor of the first neighboring cell The class of the class NZP-CSI-RS;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell is PS S or the first Class PSS of neighboring cells
- the second reference signal resource configuration of the first neighboring cell the number of antenna ports of the second reference signal of the first neighboring cell, and the subframe information of the second reference signal of the first neighboring cell.
- the auxiliary The information further includes: a cell ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- the auxiliary The information further includes: a scrambling code ID of the second reference signal of the first neighboring cell.
- the auxiliary information further includes: a first reference signal of the first neighboring cell a subframe deviation P from a second reference signal of the first neighboring cell; wherein the P is greater than or equal to 1.
- a base station is provided, where the base station is a base station corresponding to a first neighboring cell, and the base station includes
- a sending unit configured to send a first reference signal and a second reference signal of the first neighboring cell, where the first reference signal is used for UE synchronization with a cell; and the second reference signal is used by the UE Cell discovery and RRM measurements.
- the second reference signal of the first neighboring cell is an NZP-CSI-RS of the first neighboring cell or the first neighboring cell Class NZP-CSI-RS;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell is the first neighboring cell PS S or a PSS of the first neighboring cell;
- the base station further includes a mapping unit , for,
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to four resources in each resource block; or, the first neighboring cell
- the second reference signal is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to 8 resource units in each resource block; or
- the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is mapped to 8 resource units in each resource block.
- the base station Also includes,
- a determining unit configured to determine, according to the cell ID of the first neighboring cell and the configured number of resources, a sending resource location of the second reference signal of the first neighboring cell.
- the determining unit is specifically configured to:
- the determining unit is specifically configured to:
- the sending The unit is also used,
- the sending The unit is further configured to: send a sending parameter of the first reference signal of the first neighboring cell and a sending parameter of the second reference signal of the first neighboring cell to all neighboring cells of the first neighboring cell, so that The user equipment UE in all neighboring cells of the first neighboring cell performs cell discovery.
- the sending unit is further configured to periodically send the first reference signal and the second reference signal of the first neighboring cell according to a preset period.
- the UE detects a first reference signal of the first neighboring cell or detects a second reference signal of the first neighboring cell or detects a first reference signal and a second reference signal of the first neighboring cell according to the auxiliary information. And referring to the signal, acquiring a cell ID or a virtual ID of the first neighboring cell.
- the second reference signal of the first neighboring cell is an NZP-CSI-RS of the first neighboring cell or the first neighboring cell Class NZP-CSI-RS;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell is a PSS of the first neighboring cell or a PSS of the first neighboring cell;
- the generated root sequence number of the PSS is different from the generated root sequence number of the PSS.
- the first reference signal and the second reference signal are quasi-co-sited.
- the UE is synchronized with the first neighboring cell, where the first correlation value is the first reference signal sequence of the detected first neighboring cell. Any one of a plurality of correlation values obtained by performing a correlation operation on each of the local first reference signal sequences respectively specified by the protocol.
- the first reference signal in the first neighboring cell Obtaining, by the first reference signal of the neighboring cell, the first reference signal ID of the first neighboring cell, including, And acquiring, by the first reference signal of the first neighboring cell, an actual transmission resource location, acquiring a first reference signal sequence of the first neighboring cell;
- an eighth possible implementation manner of the fourth aspect Obtaining a second reference signal of the first neighboring cell, acquiring a second reference signal of the first neighboring cell, and acquiring a scrambling code ID of the second reference signal of the first neighboring cell, where
- the method Also includes,
- the determining, according to the resource information of the second reference signal of the first neighboring cell, determining the first Whether the neighboring cell is discovered including,
- the second correlation value is greater than the preset discovery condition, the first neighboring cell is found; where the second correlation value is the second reference signal of the detected first neighboring cell respectively
- the M local second reference signal sequences perform any one of the M correlation values obtained by the correlation operation.
- the auxiliary information further includes: a cell ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- the UE detects the first reference signal of the first neighboring cell according to the auxiliary information, Synchronizing the UE with the first neighboring cell, including,
- the UE detects, according to the auxiliary information, a first reference signal sequence of the first neighboring cell.
- the UE is synchronized with the first neighboring cell.
- the auxiliary information further includes: a scrambling code ID of the second reference signal of the first neighboring cell.
- the determining, according to the resource information of the second reference signal of the first neighboring cell, whether the first neighboring cell is found including,
- the fourth correlation value is greater than a preset discovery condition, the first neighboring cell is found.
- the UE detects the first reference signal of the first neighboring cell according to the auxiliary information, including,
- the resource information of the second reference signal of the UE in the first neighboring cell indicates Detecting a first reference signal of the first neighboring cell in a subframe
- the UE If the first reference signal of the first neighboring cell is sent in the Nth subframe 0 or the subframe 5 before or after the second reference signal of the first neighboring cell, the UE is in the first neighboring cell Detecting, by subframe 0 or subframe 5 before or after the subframe indicated by the resource information of the second reference signal, the first reference signal of the first neighboring cell; wherein, the N is greater than or equal to 1;
- the auxiliary information further includes: the first part of the first neighboring cell a reference signal and a sub-reference signal of the first neighboring cell a frame deviation P; the UE detects a first reference signal of the first neighboring cell in a Pth subframe before or after a subframe indicated by the resource information of the second reference signal of the first neighboring cell; P is greater than or equal to 1.
- the method further includes: performing radio resource management RRM measurement of the first neighboring cell at a sending resource location of a second reference signal of the first neighboring cell according to resource information of a second reference signal of the first neighboring cell Obtaining a measurement quantity; wherein the measurement quantity comprises at least one of a reference signal received power RSRP, a received signal strength indicator RS SI, and a reference signal received quality RSRQ.
- the auxiliary information further includes: resource information of the measurement resource 1 of the first neighboring cell;
- the resource information of the measurement resource 1 of the first neighboring cell includes at least one of the following information:
- the resource configuration of the measurement resource 1 of the first neighboring cell, the number of antenna ports of the measurement resource 1 of the first neighboring cell, and the subframe information of the measurement resource 1 of the first neighboring cell is the resource configuration of the measurement resource 1 of the first neighboring cell, the number of antenna ports of the measurement resource 1 of the first neighboring cell, and the subframe information of the measurement resource 1 of the first neighboring cell.
- the measurement resource one of the first neighboring cell is a zero power channel of the first neighboring cell
- the status indicates the reference signal ZP-CSI-RS.
- the resource information of the second reference signal of the cell, the RRM measurement of the first neighboring cell is performed at a sending resource location of the second reference signal of the first neighboring cell, and the measured quantity is obtained, where
- the RRM measurement of the first neighboring cell is performed by the location of the transmission resource of the measurement resource of the cell, and the measured quantity RSSI is obtained;
- a fifth aspect provides a method for cell discovery, including,
- auxiliary information includes resource information of the second reference signal of the first neighboring cell
- the second reference signal of the first neighboring cell is an NZP-CSI-RS or the first neighbor of the first neighboring cell The class of the class NZP-CSI-RS;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell is a PS S or the first Class PSS of neighboring cells
- the generated root sequence number of the PSS is different from the generated root sequence number of the PSS.
- the first neighboring cell includes at least one of the following information:
- the second reference signal resource configuration of the first neighboring cell the number of antenna ports of the second reference signal of the first neighboring cell, and the subframe information of the first neighboring cell.
- the auxiliary information further includes a second part of the first neighboring cell The scrambling code ID of the reference signal.
- the first reference of the first neighboring cell When the signal is transmitted in the pth subframe before or after the second reference signal of the first neighboring cell, the auxiliary information further includes: the first reference signal of the first neighboring cell and the first neighboring cell a subframe offset P of the second reference signal; wherein the P is greater than or equal to 1.
- a sixth aspect provides a method for cell discovery, including,
- Transmitting a first reference signal and a second reference signal of the first neighboring cell where the first reference signal is used for UE synchronization with a cell; and the second reference signal is used by the UE to perform cell discovery and RRM measurement .
- the second reference signal of the first neighboring cell is an NZP-CSI-RS of the first neighboring cell or the first neighboring cell Class NZP-CSI-RS;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell is the first neighboring cell PS S or a PSS of the first neighboring cell;
- the generated root sequence number of the PSS is different from the generated root sequence number of the PSS.
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to four resources in each resource block; or, the first neighboring cell
- the second reference signal is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to 8 resource units in each resource block; or
- the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is mapped to four resource units in each resource block; or
- the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is mapped to 8 resource units in each resource block.
- the sequence length of the second reference signal of the first neighboring cell is Q times the number of resource blocks included in the maximum system bandwidth, where Q is a positive integer greater than 1.
- the method Before the sending the first reference signal and the second reference signal of the first neighboring cell, the method further includes: determining, according to the cell ID of the first neighboring cell and the configured number of resources, determining the first neighboring cell The location of the transmission resource of the second reference signal.
- the determining, according to a cell ID of the first neighboring cell and a quantity of configured resources, a transmission resource location of a second reference signal of a neighboring cell including,
- the resources configured by the first neighboring cell are S resource sets, and each resource set includes T resources. Determining, according to the cell ID of the first neighboring cell and the number of configured resources, a location of a sending resource of the second reference signal of the first neighboring cell, including,
- the method Also includes,
- the method And transmitting, to the neighboring cell of the first neighboring cell, the sending parameter of the first reference signal of the first neighboring cell and the sending parameter of the second reference signal of the first neighboring cell, to enable the The user equipment UE in all neighboring cells of the first neighboring cell performs cell discovery.
- the method when the corresponding base station of the first neighboring cell is in a closed state, the method further includes: And periodically transmitting the first reference signal and the second reference signal of the first neighboring cell according to a preset period.
- a user equipment including
- a receiver configured to receive auxiliary information, where the auxiliary information includes resource information of a second reference signal of the first neighboring cell, where the first neighboring cell is any neighbor of a serving base station of the UE Community
- a processor configured to detect, according to the auxiliary information, a first reference signal of the first neighboring cell, so that the UE synchronizes with the first neighboring cell;
- the processor is further configured to: detect, according to the auxiliary information, a first reference signal of the first neighboring cell, or detect a second reference signal of the first neighboring cell, or detect a first of the first neighboring cell And obtaining, by the reference signal and the second reference signal, a cell ID or a virtual ID of the first neighboring cell.
- the second reference signal of the first neighboring cell is an NZP-CSI-RS of the first neighboring cell or the first neighboring cell Class NZP-CSI-RS;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the resource information of the second reference signal of the first neighboring cell includes the following information. At least one of:
- the resource configuration of the second reference signal of the first neighboring cell, the number of antenna ports of the second reference signal of the first neighboring cell, and the subframe information of the second reference signal of the first neighboring cell is configured.
- the first reference signal is a PS S of the neighboring cell or the first neighbor Class PS S of the cell;
- the first reference signal and the second reference signal are quasi-co-sited.
- the UE is synchronized with the first neighboring cell, where the first correlation value is the first reference signal sequence of the detected first neighboring cell. Any one of a plurality of correlation values obtained by performing a correlation operation on each of the local first reference signal sequences respectively specified by the protocol.
- the second correlation value is greater than the preset discovery condition, the first neighboring cell is found; where the second correlation value is the second reference signal of the detected first neighboring cell respectively
- the M local second reference signal sequences perform any one of the M correlation values obtained by the correlation operation.
- the auxiliary information further includes: a cell ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- the UE is synchronized with the first neighboring cell.
- the auxiliary information further includes: a scrambling code ID of the second reference signal of the first neighboring cell.
- the fourth correlation value is greater than a preset discovery condition, the first neighboring cell is found.
- the processor is specifically used to:
- first reference signal of the first neighboring cell and the second reference signal of the first neighboring cell are sent in one subframe, in a subframe indicated by resource information of the second reference signal of the first neighboring cell Detecting a first reference signal of the first neighboring cell;
- the second reference in the first neighboring cell is detected by the subframe 0 or the subframe 5 before or after the subframe indicated by the resource information of the signal; wherein, the N is greater than or equal to 1;
- the processor is also used to
- the measurement amount includes at least one of RSRP, RS SI, and RSRQ.
- the auxiliary information further includes: resource information of the measurement resource 1 of the first neighboring cell;
- the resource information of the measurement resource 1 of the first neighboring cell includes at least one of the following information: The resource configuration of the measurement resource 1 of the first neighboring cell, the number of antenna ports of the measurement resource 1 of the first neighboring cell, and the subframe information of the measurement resource 1 of the first neighboring cell.
- the measurement resource one of the first neighboring cell is a ZP-CSI of the first neighboring cell -RS.
- a processor configured to acquire a first reference signal sending parameter of the first neighboring cell and a sending parameter of the second reference signal
- the processor is further configured to generate auxiliary information according to the obtained sending parameter of the first reference signal of the first neighboring cell and the sending parameter of the second reference signal, where the auxiliary information includes the first neighbor
- the resource information of the second reference signal of the cell, the transmitter configured to send the generated auxiliary information to the user equipment UE in the cell, so that the UE performs cell discovery.
- the second reference signal of the first neighboring cell is an NZP-CSI-RS or the first neighbor of the first neighboring cell
- the class of the class NZP-CSI-RS The generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell is PS S or the first Class PSS of neighboring cells
- the generated root sequence number of the PSS is different from the generated root sequence number of the PSS.
- the first neighboring cell includes at least one of the following information:
- the second reference signal resource configuration of the first neighboring cell the number of antenna ports of the second reference signal of the first neighboring cell, and the subframe information of the second reference signal of the first neighboring cell.
- the auxiliary The information further includes a cell ID of the first neighboring cell and a first reference signal ID of the first neighboring cell.
- the auxiliary The information also includes a scrambling code ID of the second reference signal of the first neighboring cell.
- the auxiliary information further includes: a first reference signal of the first neighboring cell a subframe deviation P from a second reference signal of the first neighboring cell; wherein the P is greater than or equal to 1.
- a base station is provided, where the base station is a base station corresponding to a first neighboring cell, The base station includes
- a transmitter configured to send a first reference signal and a second reference signal of the first neighboring cell, where the first reference signal is used for UE synchronization with a cell; and the second reference signal is used by the UE Cell discovery and RRM measurements.
- the second reference signal of the first neighboring cell is an NZP-CSI-RS of the first neighboring cell or the first neighboring cell Class NZP-CSI-RS;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell is the first neighboring cell PS S or a PSS of the first neighboring cell;
- the base station further includes a processor , for,
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to four resources in each resource block; or, the first neighboring cell
- the second reference signal is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to 8 resource units in each resource block; or
- the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is mapped to four resource units in each resource block; or
- the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is mapped to 8 resource units in each resource block.
- the resources configured by the first neighboring cell are S resource sets, and each resource set includes T resources.
- the processor is specifically configured to:
- the device is further configured to: send a sending parameter of the first reference signal of the first neighboring cell and a sending parameter of the second reference signal of the first neighboring cell to all neighboring cells of the first neighboring cell, so that The UE in all neighboring cells of the first neighboring cell performs cell discovery.
- the transmitter is further configured to periodically send the first reference signal and the second reference signal of the first neighboring cell according to a preset period, when the corresponding base station of the first neighboring cell is in a closed state.
- the UE receives the auxiliary information, where the auxiliary information includes the resource information of the second reference signal of the first neighboring cell, where the first neighboring cell is the UE.
- the UE detects the first reference signal of the first neighboring cell according to the auxiliary information, so that the UE synchronizes with the first neighboring cell; and the UE detects the first reference signal of the first neighboring cell according to the auxiliary information or Detecting a second reference signal of the first neighboring cell or detecting a first reference signal and a second reference signal of the first neighboring cell, and acquiring a cell identifier ID or a virtual ID of the first neighboring cell.
- cell discovery is accurately performed, which solves the defect that cell discovery and measurement interference are large in the case of dense deployment of small base stations in the prior art.
- FIG. 1 is a schematic structural diagram of a user equipment according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of another user equipment according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention
- FIG. 5C is a schematic diagram of another resource mapping according to an embodiment of the present invention
- FIG. 5D is a schematic diagram of another resource mapping according to an embodiment of the present invention
- FIG. 6 is a flowchart of a method for cell discovery according to an embodiment of the present invention
- FIG. 8 is a schematic flowchart of another method for cell discovery according to an embodiment of the present invention.
- FIG. 9 is a schematic flowchart of still another method for cell discovery according to an embodiment of the present invention.
- FIG. 10A is a schematic flowchart diagram of still another method for cell discovery according to an embodiment of the present disclosure.
- FIG. 10B is a schematic diagram showing a relationship between a location of a transmission resource of a first reference signal and a second reference signal according to an embodiment of the present invention
- FIG. 10C is a schematic diagram of a relationship between a location of a transmission resource of another first reference signal and a second reference signal according to an embodiment of the present invention.
- FIG. 10D is a schematic diagram showing a relationship between a location of a transmission resource of a first reference signal and a second reference signal according to an embodiment of the present invention.
- FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention
- FIG. 12 is a schematic structural diagram of a base station according to an embodiment of the present invention
- FIG. 13 is a schematic structural diagram of another base station according to an embodiment of the present invention.
- a user equipment 10 is provided in Embodiment 1 of the present invention.
- the user equipment 10 may include
- the receiving unit 101 is configured to receive the auxiliary information, where the auxiliary information may include the resource information of the second reference signal of the first neighboring cell, where the first neighboring cell is any neighboring cell of the serving base station of the UE;
- the synchronization unit 102 is configured to detect, according to the auxiliary information received by the receiving unit 101, the first reference signal of the first neighboring cell, so that the UE synchronizes with the first neighboring cell;
- the acquiring unit 103 is configured to detect, according to the auxiliary information received by the receiving unit 101, the first reference signal of the first neighboring cell, or detect the second reference signal of the first neighboring cell, or detect the first reference signal of the first neighboring cell, and the second The reference signal acquires a cell identity ID or a virtual ID of the first neighboring cell.
- the virtual ID of the first neighboring cell is an ID that has a preset correspondence with the ID of the first neighboring cell, and the specific preset correspondence may be determined according to actual requirements, which is not limited by the present invention.
- the second reference signal of the first neighboring cell may be the NZP-CSI-RS of the first neighboring cell or the NZP-CSI-RS of the first neighboring cell; the second reference signal of the first neighboring cell of the present invention
- the specific form is not specifically limited;
- the second reference signal is generated by the scrambling code ID of the second reference signal according to a corresponding formula
- the NZP-CSI-RS is similar to the type of the NZP-CSI-RS, but when the class NZP-CSI-RS is generated, the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling code ID of the NZP-CSI-RS.
- NZP-CSI-RS and NZP-CSI-RS The following describes NZP-CSI-RS and NZP-CSI-RS
- Equation 1 where " 8 is the sequence number of the slot (slot) inside a radio frame, / is the sequence number of the Orthogonal Frequency Division Multiplexing (OFDM) symbol within a slot, Is the number of resource blocks included in the maximum configurable system bandwidth.
- c in Equation 1 (0 is a pseudo-random sequence, which is defined in the LTE protocol.
- the second reference signal is generated by the formula 1; if the second reference signal uses the class NZP-CSI-RS, the generating formula is the same as the NZP-CSI-RS, and both are used. Equation 1, but the scrambling code ID used is instead of N;
- a s and N can be different values.
- the resource information of the second reference signal of the first neighboring cell may include at least one of the following information:
- the resource configuration of the second reference signal of the first neighboring cell refers to the resource location of the second reference signal used by the first neighboring cell in the communication system resource;
- the time-frequency resource of 12 subcarriers is called a resource block in time.
- RE Resource Element
- one RE is the smallest time-frequency unit; then, the resource configuration of the second reference signal of the first neighboring cell is used to indicate which REs in the communication system resources Transmitting a second reference signal of the first neighboring cell; and determining, by the UE, the second reference signal of the first neighboring cell on the UE by using the resource configuration of the second reference signal of the first neighboring cell;
- the number of antenna ports of the second reference signal of the first neighboring cell is used to indicate the number of antenna ports used to transmit the second reference signal in the first neighboring cell; in the communication system, the antenna port of the second reference signal The number is configurable.
- the base station sends the second reference signal, it may send from one antenna port, or multiple antenna ports may send the second reference signal.
- the number of antenna ports of the second reference signal may be configured. It is one of ( 1/2/4/8); the UE can correctly detect the second reference signal of the first neighboring cell by using the number of antenna ports and the resource sequence number of the second reference signal of the first neighboring cell;
- the first reference signal of the first neighboring cell may be the PS S of the neighboring cell or the PS S of the first neighboring cell.
- the type of the first reference signal of the first neighboring cell is not specifically limited.
- the first reference signal is generated by the first reference signal ID according to a corresponding formula, and the PSS-like type is similar to the type of the PSS, but when the PS-like class is generated, the generated root sequence number of the PSS-like and the generation of the PSS are generated. The root number is different.
- NZP-CSI-RS and NZP-CSI-RS The following describes NZP-CSI-RS and NZP-CSI-RS
- the formula for generating the PSS sequence is as follows: .7am ⁇ n+ ⁇ )
- u is called the root number; the root number is uniquely determined by the ID of a cell; if the first reference signal is of the class PS S, the root number of the PSS-like generation is u , and the value of the root number u generated by the PSS is not the same.
- the first reference signal and the second reference signal are quasi-co-located, which means that the first reference signal and the second reference signal have similarities on the passed channels; that is, the first reference signal and the second reference
- the signals are similar in Doppler shift, Doppler distribution, average delay, and delay distribution; or some of the above four parameters are similar.
- the synchronization unit 102 may synchronize the UE with the first neighboring cell by using the following two methods:
- the first mode when the auxiliary information does not include the first reference signal ID of the first neighboring cell,
- the UE is synchronized with the first neighboring cell, where the first correlation value is the first reference signal sequence of the detected first neighboring cell and the protocol is respectively specified.
- the first correlation value is the first reference signal sequence of the detected first neighboring cell and the protocol is respectively specified.
- Each of the local first reference signal sequences performs any one of a plurality of correlation values obtained by the correlation operation.
- the second mode when the auxiliary information includes the first reference signal ID of the first neighboring cell,
- the first reference signal sequence of the detected first neighboring cell is local to the first neighboring cell Performing a correlation operation on the first reference signal sequence to obtain a third correlation value;
- the UE synchronizes with the first neighboring cell. It should be noted that, in the process of synchronizing the UE with the first neighboring cell, determining whether the UE is synchronized with the first neighboring cell by using the obtained correlation value and the preset threshold; wherein the preset threshold is based on the actual situation in the UE.
- the specific data of the preset threshold is not specifically limited by the present invention.
- the UE can further discover or measure the first neighboring cell. If the UE is not synchronized with the first neighboring cell, the UE does not discover and measure the first neighboring cell. .
- the obtaining unit 103 may obtain the cell ID or the virtual ID by using any one of the following three methods:
- the first reference signal of the first neighboring cell has a corresponding relationship with the sending position of the second reference signal of the first neighboring cell, and the corresponding relationship may be a clear correspondence between the base station and the UE, or a corresponding relationship configured by the base station;
- the base station may send the indication information to indicate the positional relationship between the first reference signal and the second reference signal, and then send the resource information according to the second reference signal of the first neighboring cell and the base station.
- the indication information may obtain the actual transmission resource location of the first reference signal of the first neighboring cell;
- the first reference signal of the detected first neighboring cell is respectively determined by the local number specified by the protocol Acquiring a reference signal sequence to obtain a first reference signal ID of the first neighboring cell; acquiring a virtual ID of the first neighboring cell according to the first reference signal ID of the first neighboring cell; or, according to the first neighboring cell Obtaining a cell ID of the first neighboring cell by a correspondence between the reference signal ID and the cell ID;
- the corresponding relationship between the first reference signal ID and the cell ID of the first neighboring cell is a clear relationship between the base station and the UE, which is not specifically limited by the present invention.
- the corresponding relationship between the scrambling code ID and the cell ID of the second reference signal of the first neighboring cell is a clear agreement between the base station and the UE, and the present invention does not specifically limit this.
- the scrambling code ID of the second reference signal of the first neighboring cell and the first neighboring cell is an agreement relationship between the base station and the UE, which is not specifically limited in the present invention.
- the acquiring unit 103 when the first reference signal of the first neighboring cell is actually transmitted, detects the first reference signal of the first neighboring cell, and obtains the first reference signal ID of the first neighboring cell, which may include
- the first reference signal sequence of the detected first neighboring cell When the first reference signal sequence of the detected first neighboring cell is correlated with the local first reference signal sequence specified by the protocol of the first reference signal sequence actually used by the first neighboring cell, a correlation peak is obtained, And determining a first reference signal sequence that is actually used by the first neighboring cell; and calculating, according to the first reference signal sequence actually used by the first neighboring cell, a root sequence number used to generate the sequence, and querying the root serial number according to the root serial number a reference signal correspondence table, the first reference signal ID of the first neighboring cell is obtained;
- the first reference signal I D of the first neighboring cell may be directly obtained by using the auxiliary information.
- the acquiring unit 103 detects the second reference signal of the first neighboring cell, and obtains the scrambling code ID of the second reference signal of the first neighboring cell, where the second reference signal of the first neighboring cell actually transmits the resource location, which may include
- the scrambling code ID of the second reference signal of the first neighboring cell may be directly obtained by using the auxiliary information.
- the user equipment 10 may further include
- the determining unit 104 is configured to determine, according to the resource information of the second reference signal of the first neighboring cell, whether the first neighboring cell is found.
- the determining unit 104 may determine whether the first neighboring cell is found by the following two methods:
- the second correlation value is greater than the preset discovery condition, the first neighboring cell is found; wherein, the second correlation value is the detected second reference signal of the first neighboring cell and the M local second reference signal sequence respectively Perform any one of the M correlation values obtained by the correlation operation.
- the second mode the auxiliary information includes a scrambling code of the second reference signal of the first neighboring cell
- the fourth correlation value is greater than the preset discovery condition, the first neighboring cell is found.
- the preset discovery condition is a threshold value used to determine the signal strength of the first neighboring cell; if the second reference signal sequence of the obtained first neighboring cell is detected and the local second reference signal sequence specified by any one of the protocols is detected If the correlation value is greater than the preset discovery condition, the signal strength of the first neighboring cell is sufficient, and the first neighboring cell is found; if the second reference signal sequence of the first neighboring cell is detected and the local second reference specified by all protocols is detected If the correlation value of the signal sequence is less than the preset discovery condition, the signal strength of the first neighboring cell is insufficient, and the first neighboring cell is not found.
- the preset discovery condition can be determined according to actual requirements, which is not specifically limited by the present invention.
- the acquiring, by the acquiring unit 103, the cell ID or the virtual ID of the first neighboring cell may be performed after the UE synchronizes with the first neighboring cell, or after the UE synchronizes with the first neighboring cell, and the determining unit 104 determines.
- the first neighboring cell is found after the discovery; the present invention does not specifically limit this.
- auxiliary information may further include: a cell ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell;
- the synchronization unit 103 detects the first reference signal of the first neighboring cell, so that the UE synchronizes with the first neighboring cell, the synchronization unit 103 is different according to the sending position of the first reference signal of the first neighboring cell.
- the location of detecting the first reference signal of the first neighboring cell may be in the following three manners:
- the first mode if the first reference signal of the first neighboring cell and the first neighboring cell The second reference signal is sent in one subframe, and the first reference signal of the first neighboring cell is detected in a subframe indicated by the resource information of the second reference signal of the first neighboring cell;
- the second mode if the first reference signal of the first neighboring cell is sent in the Nth subframe 0 or the subframe 5 before or after the second reference signal of the first neighboring cell, the second reference signal in the first neighboring cell The first reference signal of the first neighboring cell is detected by the subframe 0 or the subframe 5 before or after the subframe indicated by the resource information; where N is greater than or equal to 1; wherein, N may be determined according to actual requirements, and the present invention is The third manner is: if the first reference signal of the first neighboring cell is sent in the Pth subframe before or after the second reference signal of the first neighboring cell, the second reference in the first neighboring cell The Pth subframe before or after the subframe indicated by the resource information of the signal detects the first reference signal of the first neighboring cell; wherein, the P is greater than or equal to 1; at this time, the auxiliary information further includes: the first neighboring cell a sub-frame deviation P of a reference signal from a second reference signal of the first neighboring cell; wherein the P
- the P may be determined according to actual needs, and the present invention does not specifically limit this. It should be noted that the timing relationship between the first reference signal and the second reference signal of the first neighboring cell may have the timing relationship described in the foregoing three manners, or may have other timing correspondences, which may be determined according to actual requirements. The invention is not specifically limited thereto.
- the user equipment 10 may further include
- the measuring unit 105 is configured to perform, according to the resource information of the second reference signal of the first neighboring cell, the RRM measurement of the first neighboring cell in the sending resource location of the second reference signal of the first neighboring cell, to obtain the measured quantity;
- the amount may include at least one of RSRP, RSSI, and RSRQ.
- the auxiliary information may further include: resource information of the measurement resource 1 of the first neighboring cell; where, the resource information of the measurement resource 1 of the first neighboring cell includes at least one of the following information: measurement of the first neighboring cell The resource configuration of the resource 1, the number of antenna ports of the first neighboring cell, and the subframe information of the first resource of the first neighboring cell.
- the resource configuration of the measurement resource 1 of the first neighboring cell refers to the resource location of the measurement resource 1 used to send the first neighboring cell in the communication system resource; in LTE, One time slot lasts in time, and one time-frequency resource including 12 sub-carriers on the frequency is called a resource block; one OFDM symbol continues in time, and one time-frequency resource including one sub-carrier on the frequency is called one RE; In the protocol, one RE is the smallest time-frequency unit; then, the resource configuration of the second reference signal of the first neighboring cell is used to indicate which REs in the communication system resource send the second reference signal of the first neighboring cell The UE can use the resource configuration of the measurement resource 1 of the first neighboring cell to determine, on which UE, the measurement resource 1 of the first neighboring cell is detected;
- the number of antenna ports of the measurement resource 1 of the first neighboring cell is used to indicate the number of antenna ports used to transmit the measurement resource 1 in the first neighboring cell.
- the number of antenna ports of the measurement resource 1 is In the configuration, when the base station sends the measurement resource, it can be sent from one antenna port, or multiple antenna ports can send the measurement resource one; the UE can correctly detect the number of antenna ports and the resource number of the measurement resource 1 of the first neighboring cell. Measurement resources of the first neighboring cell-;
- the subframe information of the measurement resource 1 of the first neighboring cell is the transmission period of the measurement resource 1 of the first neighboring cell and the location of the transmission subframe; since the measurement resource is periodically sent by the base station, the transmission period is It can be configured; the UE can correctly detect the measurement resource of the first neighboring cell through the subframe information.
- the measurement unit 105 may specifically be used,
- the first neighboring cell is any neighboring cell of the serving base station of the UE. In the process of performing the cell discovery by the UE, the same processing is performed on all the neighboring cells.
- the first neighboring cell is used as an example for description in the embodiment of the present invention, and the processing methods of other neighboring cells are the same, and are not described again.
- the embodiment of the present invention provides a user equipment 10, by receiving auxiliary information, where the auxiliary information includes resource information of a second reference signal of the first neighboring cell, where the first neighboring cell is any neighboring cell of the serving base station of the UE. Detecting the first reference signal of the first neighboring cell according to the auxiliary information, so that the UE synchronizes with the first neighboring cell; detecting the first reference signal of the first neighboring cell or detecting the second reference signal of the first neighboring cell according to the auxiliary information Detecting a first reference signal and a second reference signal of the first neighboring cell, and acquiring a cell identifier ID or a virtual ID of the first neighboring cell.
- cell discovery is accurately performed, which solves the defect that the cell discovery interference is large in the case of dense deployment of small base stations in the prior art.
- Embodiment 2 Embodiment 2
- the second embodiment of the present invention provides a base station 30, which is a service base station of the user equipment 10.
- the base station 30 may include
- the acquiring unit 301 is configured to acquire a first reference signal sending parameter of the first neighboring cell and a sending parameter of the second reference signal;
- the obtaining, by the first neighboring cell, the first reference signal sending parameter and the sending parameter of the second reference signal may be configured in the base station 30 when the station is established, and the base station 30 directly reads and acquires; Obtaining, by the base station, the first reference signal sending parameter of the first neighboring cell and the sending parameter of the second reference signal;
- the method for acquiring the first reference signal transmission parameter of the first neighboring cell and the sending parameter of the second reference signal is not specifically limited.
- the generating unit 302 is configured to generate auxiliary information according to the sending parameter of the first reference signal of the first neighboring cell and the sending parameter of the second reference signal, where the acquiring information may include the second neighboring cell.
- the resource information of the reference signal is used by the sending unit 303, configured to send the auxiliary information generated by the generating unit 302 to the UE in the cell, so that the UE performs cell discovery.
- the second reference signal of the first neighboring cell may be the first neighboring cell
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling ID of the NZP-CSI-RS;
- the first reference signal of the first neighboring cell may be the PS S of the first neighboring cell or the PS S of the first neighboring cell;
- the generated root sequence number of the PSS is different from the generated root sequence number of the PS S. It should be noted that the specific form of the second reference signal is not specifically limited.
- a second reference signal resource configuration of the first neighboring cell an antenna port number of the second reference signal of the first neighboring cell, and subframe information of the second reference signal of the first neighboring cell;
- auxiliary information may further include: a cell identifier ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- auxiliary information may further include: a scrambling code ID of the second reference signal of the first neighboring cell.
- the auxiliary information may further include: the first reference signal of the first neighboring cell and a subframe offset P of the second reference signal of the first neighboring cell; wherein P is greater than or equal to 1.
- the subframe deviation P of the first reference signal of the first neighboring cell and the second reference signal of the first neighboring cell may be determined according to actual requirements, which is not limited by the present invention.
- the first neighboring cell is any neighboring cell of the serving base station of the UE. Therefore, in the process of performing cell discovery by the UE, the same processing is performed on all the neighboring cells. For example, the processing methods of other neighboring cells are the same and will not be described again.
- the third embodiment of the present invention provides a base station 40, where the base station 40 is a base station corresponding to the first neighboring cell.
- the base station 40 may include
- the sending unit 401 is configured to send the first reference signal and the second reference signal of the first neighboring cell, where the first reference signal is used for the UE to synchronize with the cell, and the second reference signal is used by the UE to perform cell discovery and RRM measurement.
- the second reference signal of the first neighboring cell may be an NZP-CSI-RS of the first neighboring cell or an NZP-CSI-RS of the first neighboring cell;
- the generated root sequence number of the class PSS is different from the generated root sequence number of the PS S;
- the base station 40 may further include
- Mapping unit 402 can be used,
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to four resource units in each resource block, and four resource lists are The location of the element is the same as the resource mapping of the 4 antenna port of the CSI-RS in LTE; see FIG. 5B, the second reference signal of the first neighboring cell is transmitted by one antenna port (antenna port a);
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to 8 resource units in each resource block; the location of 8 resource units and the CSI in LTE
- the resource mapping of the 8 antenna ports of the RS is the same; see FIG. 5C, the second reference signal of the first neighboring cell is transmitted by one antenna port (antenna port a);
- the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is mapped on 4 resource elements in each resource block; the location of 4 resource elements and the CSI in LTE -
- the resource mapping of the 4 antenna ports of the RS is the same; see FIG. 5D, the second reference signal of the first neighboring cell is transmitted by one or two antenna ports (antenna port a and antenna port b);
- the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is mapped in 8 resource units in each resource block; the location of 8 resource units and CSI in LTE
- the resource mapping of the 8 antenna ports of the RS is the same; Referring to FIG. 5E, the second reference signal of the first neighboring cell is transmitted by one or two antenna ports (antenna port a and antenna port b).
- sequence length of the second reference signal of the first neighboring cell is Q times the number of resource blocks included in the maximum system bandwidth, where the Q is a positive integer greater than 1.
- the base station 40 may further include
- the determining unit 403 is configured to determine, according to the cell ID of the first neighboring cell and the configured number of resources, a sending resource location of the second reference signal of the first neighboring cell.
- the determining unit 403 may determine, by using any one of the following methods, the sending resource location of the second reference signal of the first neighboring cell according to the cell ID of the first neighboring cell and the number of configured resources:
- the first method calculating, by the primary synchronization signal PS S ID of the first neighboring cell, a transmission resource location of the second reference signal of the first neighboring cell.
- the second method calculating, by the secondary synchronization signal SS S ID of the first neighboring cell, the location of the transmission resource of the second reference signal of the first neighboring cell.
- the resource configured by the first neighboring cell is a set of S resources, and each resource set includes T resources, and the sending resource set of the second reference signal of the first neighboring cell is determined according to the PSS ID of the first neighboring cell; Determining, according to the S SS ID of the first neighboring cell, a location of the transmission resource in the transmission resource set of the second reference signal of the first neighboring cell.
- the sending unit 401 is further configured to:
- the sending unit 401 is further configured to: send the sending parameter of the first reference signal of the first neighboring cell and the sending parameter of the second reference signal of the first neighboring cell to all neighboring cells of the first neighboring cell, so that The UE in all neighboring cells of the first neighboring cell performs cell discovery.
- the embodiment of the present invention provides a base station 40, which is configured to enable a UE to perform cell discovery by transmitting a first reference signal and a second reference signal of a first neighboring cell, where the first reference signal is used for UE and cell synchronization;
- the reference signal is used by the UE for cell discovery and RRM measurements. Realize cell discovery accurately in the case of dense deployment of small base stations, and solve the problem of cell discovery interference in the case of dense deployment of small base stations in the prior art. Big flaws.
- Embodiment 4 is configured to enable a UE to perform cell discovery by transmitting a first reference signal and a second reference signal of a first neighboring cell, where the first reference signal is used for UE and cell synchronization;
- the reference signal is used by the UE for cell discovery and RRM measurements. Realize cell discovery accurately in the case of dense deployment of small base stations, and solve the problem of cell discovery interference in the case of dense deployment of small base stations in the prior art. Big flaws.
- a fourth embodiment of the present invention provides a method for cell discovery. Referring to FIG. 6, the method may include:
- the UE receives the auxiliary information, where the auxiliary information includes the resource information of the second reference signal of the first neighboring cell, where the first neighboring cell is any neighboring cell of the serving base station of the UE.
- NZP-CSI-RS and the NZP-CSI-RS are described in detail in Embodiment 1, and are not described here.
- the resource information of the second reference signal of the first neighboring cell may include at least one of the following information:
- the number of antenna ports of the second reference signal of the first neighboring cell is used to indicate the number of antenna ports used to send the second reference signal in the first neighboring cell;
- the number of antenna ports of the second reference signal is configurable.
- the base station may send the second reference signal, or multiple antenna ports may send the second reference signal.
- the number of antenna ports of the second reference signal may be configured as one of (1/2/4/8); the number of antenna ports and resource numbers of the second reference signal of the first neighboring cell may be correctly detected by the UE, and the first neighboring cell may be correctly detected.
- Second reference signal
- the subframe information of the second reference signal of the first neighboring cell is a transmission period of the second reference signal of the first neighboring cell and a location of the transmission subframe; and the second reference signal is periodically sent by the base station, where The sending period is configurable; the UE can correctly detect the second reference signal of the first neighboring cell by using the subframe information.
- the first reference signal of the first neighboring cell may be the PSS of the neighboring cell or the PSS of the first neighboring cell; wherein the generated root sequence number of the PSS is different from the generated root sequence number of the PSS.
- step 602 may synchronize the UE with the first neighboring cell by using the following two methods:
- the first mode when the auxiliary information does not include the first reference signal ID of the first neighboring cell,
- the UE is synchronized with the first neighboring cell, where the first correlation value is the first reference signal sequence of the detected first neighboring cell and the protocol is respectively specified.
- the first correlation value is the first reference signal sequence of the detected first neighboring cell and the protocol is respectively specified.
- Each of the local first reference signal sequences performs any one of a plurality of correlation values obtained by the correlation operation.
- the second mode when the auxiliary information includes the first reference signal ID of the first neighboring cell, Obtaining a first reference signal sequence of the first neighboring cell according to the auxiliary information, and generating a local first reference signal sequence of the first neighboring cell according to the first reference signal ID of the first neighboring cell;
- the UE synchronizes with the first neighboring cell. It should be noted that, in the process of synchronizing the UE with the first neighboring cell, determining whether the UE is synchronized with the first neighboring cell by using the obtained correlation value and the preset threshold; wherein the preset threshold is based on the actual situation in the UE.
- the specific data of the preset threshold is not specifically limited by the present invention.
- the UE can further discover or measure the first neighboring cell. If the UE is not synchronized with the first neighboring cell, the UE does not discover and measure the first neighboring cell. .
- first reference signal and the second reference signal are quasi-co-sited.
- the UE detects, according to the auxiliary information, the first reference signal of the first neighboring cell, or detects the second reference signal of the first neighboring cell, or detects the first reference signal and the second reference signal of the first neighboring cell, to obtain the first neighboring cell.
- the cell ID of the first neighboring cell has an agreed relationship with the first reference signal ID of the first neighboring cell and the scrambling code ID of the second reference signal of the first neighboring cell, so when acquiring the first neighboring cell When the first reference signal ID and/or the scrambling code ID of the second reference signal of the first neighboring cell, the cell ID of the first neighboring cell is obtained;
- the UE may obtain the cell identifier ID or the virtual ID of the first neighboring cell by using any one of the following three manners according to the auxiliary information:
- the first reference signal of the first neighboring cell is obtained according to the first reference signal of the first neighboring cell
- the first reference signal of the first neighboring cell of the first neighboring cell is detected, and the first reference signal of the first neighboring cell is obtained, and the first reference signal ID of the first neighboring cell is obtained, which may specifically include:
- the first reference signal sequence of the first neighboring cell is detected by the first reference signal of the first neighboring cell
- the first reference signal sequence of the detected first neighboring cell is correlated with the local first reference signal sequence specified by the protocol to obtain the first reference signal ID of the first neighboring cell.
- the following takes the LTE system as an example to describe the correspondence between the first reference signal of the first neighboring cell and the first reference signal ID of the first neighboring cell;
- the first reference signal is taken as an example of PSS, and the generation and correspondence of the first reference signal are described.
- the formula for generating the PSS sequence is the formula 3 in the first embodiment
- the local first reference signal specified by multiple protocols may be generated according to the generation formula of the first reference signal and the root sequence number specified by multiple protocols; or may be based on the first reference signal of the first neighboring cell. And generating a formula of the sequence and the first reference signal, and acquiring a first reference signal ID of the first neighboring cell.
- the first reference signal sequence of the detected first neighboring cell and the first neighboring cell When the locally used first reference signal sequence specified by the protocol of the first reference signal sequence is actually used for correlation operation, a correlation peak is obtained, so that the first reference signal sequence actually used by the first neighboring cell can be determined;
- the first reference signal sequence actually used by the neighboring cell can calculate the root sequence number used to generate the sequence, and query the root sequence number and the first reference signal correspondence table according to the root sequence number to obtain the first reference signal ID of the first neighboring cell;
- the first reference signal I D of the first neighboring cell may be directly obtained by using the auxiliary information.
- the second reference signal of the first neighboring cell is generated by the scrambling code ID of the second reference signal of the first neighboring cell, so that the second reference of the first neighboring cell can be obtained according to the second reference signal of the first neighboring cell.
- the scrambling code ID of the signal is generated by the scrambling code ID of the second reference signal of the first neighboring cell, so that the second reference of the first neighboring cell can be obtained according to the second reference signal of the first neighboring cell.
- the second reference signal of the first neighboring cell is used to detect the second reference signal of the first neighboring cell, and the scrambling code ID of the second reference signal of the first neighboring cell is obtained.
- the second reference signal sequence of the detected first neighboring cell is correlated with the M local second reference signal sequences to obtain the scrambling code ID of the second reference signal of the first neighboring cell.
- the correlation peak is obtained. And determining a second reference signal sequence that is actually used by the first neighboring cell; and calculating a scrambling code ID of the second reference signal of the first neighboring cell according to the second reference signal sequence actually used by the first neighboring cell;
- the scrambling code ID of the second reference signal of the first neighboring cell may be directly obtained by using the auxiliary information.
- the following takes the LTE system as an example to illustrate that the second reference signal of the first neighboring cell is a scrambling code ID corresponding to the second reference signal of the first neighboring cell;
- the second reference signal is NZP-CSI-RS as an example;
- the NZP-CSI-RS sequence is generated by Equation 1 and Equation 2 in Embodiment 1;
- Equation 2 and Equation 3 the second reference signal sequence of the first neighboring cell has a computational correspondence with the scrambling code ID of the second reference signal of the first neighboring cell, and one of them can calculate and acquire the other.
- the method may further include:
- the step 604 can determine whether the first neighboring cell is found according to the following two manners:
- the first mode the auxiliary information does not include the scrambling code ID of the second reference signal of the first neighboring cell;
- the second correlation value is greater than the preset discovery condition, the first neighboring cell is found; wherein, the second correlation value is the detected second reference signal of the first neighboring cell and the M local second reference signal sequence respectively Any of the M related values obtained by the correlation operation One.
- the second mode the auxiliary information includes a scrambling code of the second reference signal of the first neighboring cell
- the fourth correlation value is greater than the preset discovery condition, the first neighboring cell is found.
- the preset discovery condition is a threshold value used to determine the signal strength of the first neighboring cell; if the second reference signal sequence of the obtained first neighboring cell is detected and the local second reference signal sequence specified by any one of the protocols is detected If the correlation value is greater than the preset discovery condition, the signal strength of the first neighboring cell is sufficient, and the first neighboring cell is found; if the second reference signal sequence of the first neighboring cell is detected and the local second reference specified by all protocols is detected If the correlation value of the signal sequence is less than the preset discovery condition, the signal strength of the first neighboring cell is insufficient, and the first neighboring cell is not found.
- the preset discovery condition can be determined according to actual requirements, which is not specifically limited by the present invention.
- the acquiring of the cell ID or the virtual ID of the first neighboring cell may be performed after the UE synchronizes with the first neighboring cell in step 602, or after the UE synchronizes with the first neighboring cell, and step 604 It is determined that the first neighboring cell is found after the discovery; the present invention does not specifically limit this.
- the auxiliary information may further include: a cell ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- the UE may detect the first reference signal of the first neighboring cell according to the auxiliary information, and may include the following three situations:
- the first case if the first reference signal of the first neighboring cell and the second reference signal of the first neighboring cell are sent in one subframe, the UE is in the subframe indicated by the resource information of the second reference signal of the first neighboring cell. Detecting a first reference signal of the first neighboring cell;
- the second case if the first reference signal of the first neighboring cell is sent in the Nth subframe 0 or the subframe 5 before or after the second reference signal of the first neighboring cell, the second reference of the UE in the first neighboring cell Detecting, by subframe 0 or subframe 5 before or after the subframe indicated by the resource information of the signal, the first reference signal of the first neighboring cell; wherein, N is greater than or equal to 1;
- the N may be determined according to actual conditions, and the present invention does not specifically limit this.
- the third case if the first reference signal of the first neighboring cell is sent in the Pth subframe before or after the second reference signal of the first neighboring cell, the auxiliary information further includes: the first reference signal of the first neighboring cell a subframe offset P of the second reference signal of the first neighboring cell; the UE detects the first reference of the first neighboring cell in the Pth subframe before or after the subframe indicated by the resource information of the second reference signal of the first neighboring cell a signal; wherein, P is greater than or equal to 1; wherein, P is greater than or equal to 1;
- the subframe deviation P of the first reference signal of the first neighboring cell and the second reference signal of the first neighboring cell may be determined according to actual conditions, which is not specifically limited by the present invention.
- the method may further include:
- the 605. Perform RRM measurement of the first neighboring cell according to the resource information of the second reference signal of the first neighboring cell, and obtain a measurement quantity, where the measurement quantity may include RSRP. At least one of RS SI and RSRQ.
- auxiliary information may further include: resource information of the measurement resource 1 of the first neighboring cell; where the resource information of the measurement resource 1 of the first neighboring cell may include at least one of the following information:
- the resource configuration of the measurement resource 1 of the first neighboring cell refers to the resource location of the measurement resource 1 used to transmit the first neighboring cell in the communication system resource; in LTE, the time interval lasts for one time slot, and the frequency includes A time-frequency resource of 12 sub-carriers is called a resource block; one OFDM symbol lasts in time, and one time-frequency resource including one sub-carrier on the frequency is called an RE; in the LTE protocol, one RE is the minimum time-frequency
- the resource configuration of the second reference signal of the first neighboring cell is used to indicate which REs of the communication system resources are to send the second reference signal of the first neighboring cell; the UE passes the measurement of the first neighboring cell.
- the resource configuration of the resource 1 can be used to determine the measurement resource 1 of the first neighboring cell on which UE;
- the number of antenna ports of the measurement resource 1 of the first neighboring cell is used to indicate the number of antenna ports used to transmit the measurement resource 1 in the first neighboring cell.
- the number of antenna ports of the measurement resource 1 is In the configuration, when the base station sends the measurement resource, it can be sent from one antenna port, or multiple antenna ports can send the measurement resource one; the UE can correctly detect the number of antenna ports and the resource number of the measurement resource 1 of the first neighboring cell. Measurement resources of the first neighboring cell-;
- the subframe information of the measurement resource 1 of the first neighboring cell is the transmission period of the measurement resource 1 of the first neighboring cell and the location of the transmission subframe; since the measurement resource is periodically sent by the base station, the transmission period is It can be configured; the UE can correctly detect the measurement resource of the first neighboring cell through the subframe information.
- the measurement resource one of the first neighboring cell is a ZP-CSI-RS of the first neighboring cell.
- the step 604 may specifically include:
- the first neighboring cell is any neighboring cell of the serving base station of the UE. Therefore, in the process of performing cell discovery by the UE, the same processing is performed on all the neighboring cells. For example, the processing methods of other neighboring cells are the same and will not be described again.
- a fifth embodiment of the present invention provides a method for cell discovery.
- the method may include
- the first reference signal of the first neighboring cell is the PSS of the first neighboring cell or the PSS of the first neighboring cell; wherein the generated root sequence number of the PSS is different from the generated root sequence number of the PSS.
- the sending parameter of the first reference signal of the first neighboring cell may include: an ID of the first reference signal of the first neighboring cell; of course, other sending parameters may also be included, which may be determined according to actual requirements, and the present invention does not Specific restrictions are made.
- the sending parameter of the second reference signal of the first neighboring cell may include at least one of the following information: a resource configuration of the second reference signal of the first neighboring cell, and an antenna port of the second reference signal of the first neighboring cell
- the second reference signal subframe information of the first neighboring cell may be included, for example, the scrambling code ID of the second reference signal of the first neighboring cell; and the second reference signal for the first neighboring cell
- the specificity of the transmission parameter may be determined according to the actual requirements. The present invention is not limited to the specific requirements, and may be determined according to actual requirements.
- auxiliary information Generate auxiliary information according to a sending parameter of the first reference signal of the first neighboring cell and a sending parameter of the second reference signal, where the auxiliary information includes resource information of the second reference signal of the first neighboring cell.
- the second reference signal resource configuration of the first neighboring cell the number of antenna ports of the second reference signal of the first neighboring cell, and the subframe information of the second reference signal of the first neighboring cell.
- auxiliary information may further include: a cell identifier ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- auxiliary information may further include: a scrambling code ID of the second reference signal of the first neighboring cell.
- the auxiliary information may further include: the first reference signal of the first neighboring cell and a subframe offset P of the second reference signal of the first neighboring cell; wherein P is greater than or equal to 1.
- subframe deviation P of the first reference signal of the first neighboring cell and the second reference signal of the first neighboring cell may be determined according to actual requirements, and the present invention No restrictions are imposed.
- the embodiment of the present invention provides a method for discovering a cell, by sending the auxiliary information, so that the UE performs cell discovery, where the auxiliary information includes resource information of the second reference signal of the first neighboring cell, where the first neighboring cell is the UE. Any neighboring cell of the serving base station.
- cell discovery is accurately performed, which solves the defect that the cell discovery interference is large in the case where the small base stations are densely deployed in the prior art.
- Embodiment 6 of the present invention provides a method for cell discovery.
- the method may include
- the first reference signal and the second reference signal are sent by the first neighboring cell.
- the first reference signal is used by the UE to synchronize with the cell.
- the second reference signal is used by the UE to perform cell discovery and radio resource management RRM measurement.
- the second reference signal of the first neighboring cell may be an NZP-CSI-RS of the first neighboring cell or an NZP-CSI-RS of the first neighboring cell;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell may be a PSS of the first neighboring cell or a PSS of the first neighboring cell;
- the method may further include:
- mapping the second reference signal of the first neighboring cell to the resource may include:
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to four resources in each resource block; or
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the first neighboring cell
- the second reference signal is mapped in 8 resource units in each resource block; or the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is in each resource
- the block is mapped on 4 resource units; or the second reference signal of the first neighboring cell is transmitted by two antenna ports, and the second reference signal of the first neighboring cell is mapped in 8 resource units in each resource block.
- the sequence length of the second reference signal of the first neighboring cell is Q times the number of resource blocks included in the maximum system bandwidth, where Q is a positive integer greater than 1.
- the sequence length of the second reference signal of the first neighboring cell depends on the number of resource blocks N X ' D included in the maximum system bandwidth, and the second reference signal of the first neighboring cell is mapped. On 2Q resources, the sequence length of the second reference signal of the first neighboring cell is Q times the number of resource blocks included in the maximum system bandwidth.
- the method may further include:
- the sending resource location of the second reference signal of the first neighboring cell may be determined according to the cell ID of the first neighboring cell and the configured number of resources in any one of the following manners:
- the PSS ID of the first neighboring cell is known, and the location of the sending resource of the second reference signal of the first neighboring cell may be calculated according to the P S S ID of the first neighboring cell;
- the PSS ID of the first neighboring cell is used to perform a modulo operation on the number of resources configured by the first neighboring cell, and the location of the transmission resource of the second reference signal of the first neighboring cell is determined;
- the PS S ID performs other operations on the number of resources configured by the first neighboring cell to determine the location of the transmission resource of the second reference signal of the first neighboring cell.
- the selection of the specific calculation mode may be determined according to actual requirements, and the present invention is This is not specifically limited;
- a neighboring cell with a cell ID of 93 is used as the first neighboring cell, and the first neighboring cell is configured with three resources as an example.
- the second reference signal of the first neighboring cell with the cell ID of 93 can be sent on the No. 0 resource.
- the transmission resource location of the second reference signal of the first neighboring cell is calculated by the SSS ID of the first neighboring cell.
- the SSS ID of the first neighboring cell is known, and the location of the sending resource of the second reference signal of the first neighboring cell may be calculated according to the SSS ID of the first neighboring cell;
- the SSS ID of the first neighboring cell is used to perform a modulo operation on the number of resources configured by the first neighboring cell, and the location of the transmission resource of the second reference signal of the first neighboring cell is determined;
- the SSS ID performs other operations on the number of resources configured by the first neighboring cell to determine the location of the transmission resource of the second reference signal of the first neighboring cell.
- the selection of the specific calculation mode may be determined according to actual requirements, and the present invention does not specifically Limited
- a neighboring cell with a cell ID of 93 is used as the first neighboring cell, and the first neighboring cell is configured with eight resources as an example.
- the second reference signal of the first neighboring cell with the cell ID of 93 can be sent on the resource No. 7.
- the resource configured by the first neighboring cell is a set of S resources, and each resource set includes T resources, and the sending resource set of the second reference signal of the first neighboring cell is determined according to the PSS ID of the first neighboring cell;
- the SSS ID determines a location of a transmission resource of the second reference signal of the first neighboring cell in the set of transmission resources;
- the PSS ID and the SSS ID of the first neighboring cell are known, and the sending resource location of the second reference signal of the first neighboring cell may be calculated according to the PSSID and the SSS ID of the first neighboring cell;
- the modulo operation is performed on the number of resource sets configured by the first neighboring cell according to the PSS ID of the first neighboring cell, and the sending resource set of the second reference signal of the first neighboring cell is determined according to the SSS ID of the first neighboring cell.
- the modulo operation is performed on the quantity of resources included in the resource set configured by the first neighboring cell, and the location of the sending resource in the sending resource set of the second reference signal of the first neighboring cell is determined;
- the sending resource set of the second reference signal of the first neighboring cell may be determined by performing other operations on the number of resource sets configured by the first neighboring cell according to the PSS ID of the first neighboring cell; or may be based on the SSS of the first neighboring cell.
- the ID performs the operation on the number of resources included in the resource set configured by the first neighboring cell, and determines the specific calculation manner of the location of the second resource reference signal in the transmission resource set of the first neighboring cell, which may be determined according to actual requirements.
- the present invention does not specifically limit this;
- a neighboring cell with a cell ID of 93 is used as the first neighboring cell, and the first neighboring cell is configured with three resource sets, and each resource set is divided into eight resources;
- the second reference signal of the first neighboring cell with the cell ID of 93 may be sent on the nickname resource in the resource set 0.
- the location of the sending resource for the first reference signal and the second reference signal in step 901 may specifically include the following three situations:
- the first case transmitting the first reference signal of the first neighboring cell and the second reference signal of the first neighboring cell in one subframe;
- the first reference signal and the second reference signal are both transmitted in subframe 0;
- a second case transmitting, by using the first reference signal of the first neighboring cell, the Nth subframe 0 or the subframe 5 before or after the second reference signal of the first neighboring cell;
- the first reference signal is sent in the first subframe 0 or the subframe 5 before the second reference signal; as shown in FIG. 10C, the period of the second reference signal is 80 ms, and the initial subframe is a sub- Frame 2, then, the second reference signal is transmitted in subframe 2 of radio frame 0, subframe 2 of radio frame 8, subframe 2 of radio frame 16; then, according to the protocol, the first reference signal is transmitted in the radio frame Subframe 0 of 0, subframe 0 of radio frame 8, and subframe 0 of radio frame 16, wherein FIG. 10C only illustrates the transmission positions of the first reference signal and the second reference signal in one radio frame.
- the third case transmitting the first reference signal of the first neighboring cell in the Pth subframe before or after the second reference signal of the first neighboring cell.
- the first reference signal is sent in the third subframe before the second reference signal; as shown in FIG. 10D, the period of the second reference signal is 80 ms, and the initial subframe is subframe 9, then, The two reference signal transmissions are transmitted on the subframe 9, the subframe 89, and the subframe 169; then, according to the protocol, the first reference signal is transmitted in the subframe 6, the subframe 86, and the subframe 166.
- Figure 10D only shows the transmission position of the first reference signal and the second reference signal in one radio frame.
- the location of the transmission resource for the first reference signal and the second reference signal may be determined according to actual requirements, which is not specifically limited by the present invention.
- the method may further include:
- the method may further include:
- the preset period can be determined according to actual requirements.
- the present invention does not specifically specify the specific content of the preset period; the shorter the preset period is set, the higher the accuracy of the cell discovery by the UE is; The longer, the more obvious the energy saving effect of the base station;
- An embodiment of the present invention provides a method for cell discovery, by transmitting a first reference signal and a second reference signal of a first neighboring cell, so that the UE performs cell discovery; wherein, the first reference signal UE is synchronized with the cell; The signal is used by the UE for cell discovery and RRM measurements.
- accurate cell discovery and measurement are performed, which solves the defect that the cell discovery and measurement interference are large in the case of dense deployment of small base stations in the prior art.
- the seventh embodiment of the present invention provides a user equipment 10, which may include at least one processor 1 101; a memory 1102; at least one communication bus 1103 for implementing the processor 1101, the memory 1102, and others. Connections between modules not shown and communicating with each other; receiver 1104;
- the communication bus 1103 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (abbreviated as EISA) Bus, etc.
- the bus 1103 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.
- Memory 1102 can be a random access memory and provides instructions and data to processor 1101. A portion of the memory 1102 can also include non-volatile line random access memory (NVRAM).
- NVRAM non-volatile line random access memory
- the memory 1 102 can be used to store all of the information contained in the distributed
- the processor 1101 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
- CPU central processing unit
- ASIC application specific integrated circuit
- the receiver 1 104 is configured to receive the auxiliary information, where the auxiliary information includes resource information of the second reference signal of the first neighboring cell, where the first neighboring cell is any neighboring cell of the serving base station of the UE;
- the processor 1101 is configured to detect, according to the received auxiliary information, a first reference signal of the first neighboring cell, so that the UE synchronizes with the first neighboring cell;
- the processor 1101 may be further configured to: detect, according to the auxiliary information, the first reference signal of the first neighboring cell or detect the second reference signal of the first neighboring cell or detect the first reference signal of the first neighboring cell and the second The reference signal acquires a cell ID or a virtual ID of the first neighboring cell.
- the second reference signal of the first neighboring cell may be an NZP-CSI-RS of the first neighboring cell or an NZP-CSI-RS of the first neighboring cell;
- the resource information of the second reference signal of the first neighboring cell may include at least one of the following information: The resource configuration of the second reference signal of the first neighboring cell, the number of antenna ports of the second reference signal of the first neighboring cell, and the subframe information of the second reference signal of the first neighboring cell.
- the first reference signal of the first neighboring cell may be a PS S of the neighboring cell or a PSS of the first neighboring cell;
- the generated root sequence number of the PSS is different from the generated root sequence number of the PS S.
- first reference signal and the second reference signal are quasi-co-sited.
- processor 1 101 can be specifically used,
- the UE is synchronized with the first neighboring cell, where the first correlation value is the detected first reference signal sequence of the first neighboring cell and each local number specified by the protocol A reference signal sequence performs any one of a plurality of correlation values obtained by the correlation operation.
- processor 1 101 can be specifically used,
- the second reference signal of the first neighboring cell Obtaining, by the second reference signal of the first neighboring cell, the second reference signal of the first neighboring cell, acquiring the second reference signal of the first neighboring cell, and acquiring the scrambling code ID of the second reference signal of the first neighboring cell; a scrambling code ID of the signal, obtaining a virtual ID of the first neighboring cell; or, according to the scrambling code ID and the cell of the second reference signal of the first neighboring cell Corresponding relationship of the ID, obtaining the cell ID of the first neighboring cell;
- the processor 1101 detects and acquires a first reference signal of the first neighboring cell, and acquires a first reference signal ID of the first neighboring cell, where the first reference signal of the first neighboring cell is used to obtain the first reference signal ID, which may include
- the first reference signal sequence of the first neighboring cell is detected by the first reference signal of the first neighboring cell
- the first reference signal sequence of the detected first neighboring cell is correlated with the local first reference signal sequence specified by the protocol to obtain the first reference signal ID of the first neighboring cell.
- the processor 1101 detects and acquires a second reference signal of the first neighboring cell, and acquires a scrambling code ID of the second reference signal of the first neighboring cell, where the second reference signal of the first neighboring cell actually transmits the resource location.
- the second reference signal sequence of the detected first neighboring cell is correlated with the M local second reference signal sequences to obtain the scrambling code ID of the second reference signal of the first neighboring cell.
- the processor 1101 determines whether the first neighboring cell is found to be specifically included,
- the second correlation value is greater than the preset discovery condition, the first neighboring cell is found; wherein, the second correlation value is that the second reference signal of the detected first neighboring cell is correlated with the M local second reference signal sequences Any one of the M related values obtained by the operation.
- the auxiliary information may further include: a cell ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- processor 1 101 is specifically applicable to,
- the UE synchronizes with the first neighboring cell.
- auxiliary information may further include: a scrambling code ID of the second reference signal of the first neighboring cell.
- the fourth correlation value is greater than the preset discovery condition, the first neighboring cell is found.
- the processor may be specifically configured to:
- first reference signal of the first neighboring cell and the second reference signal of the first neighboring cell are sent in one subframe, detecting the first neighboring cell in the subframe indicated by the resource information of the second reference signal of the first neighboring cell First reference signal;
- the resource information of the second reference signal in the first neighboring cell indicates Detecting the first reference signal of the first neighboring cell in subframe 0 or subframe 5 before or after the subframe; where N is greater than or equal to 1;
- the auxiliary information may further include: the first reference signal of the first neighboring cell and the first a subframe offset p of the second reference signal of the neighboring cell; before or after the subframe indicated by the resource information of the second reference signal of the first neighboring cell
- the P subframes detect a first reference signal of the first neighboring cell; where P is greater than or equal to 1.
- processor 1 101 is further configured to:
- the RRM measurement of the first neighboring cell in the sending resource location of the second reference signal of the first neighboring cell and acquiring the measured quantity; wherein the measured quantity may include RSRP, RS At least one of SI and RSRQ.
- auxiliary information may further include: a measurement resource of the first neighboring cell
- the resource information of the first neighboring cell may include at least one of the following information:
- the resource configuration of the measurement resource 1 of the first neighboring cell, the number of antenna ports of the measurement resource 1 of the first neighboring cell, and the subframe information of the measurement resource 1 of the first neighboring cell is the resource configuration of the measurement resource 1 of the first neighboring cell, the number of antenna ports of the measurement resource 1 of the first neighboring cell, and the subframe information of the measurement resource 1 of the first neighboring cell.
- the measurement resource of the first neighboring cell may be the first neighboring cell
- processor 1101 is specifically applicable to,
- the embodiment of the present invention provides a user equipment 10, by receiving auxiliary information, where the auxiliary information includes resource information of a second reference signal of the first neighboring cell, where the first neighboring cell is any neighboring cell of the serving base station of the UE. Detecting the first reference signal of the first neighboring cell according to the auxiliary information, so that the UE synchronizes with the first neighboring cell; detecting the first reference signal of the first neighboring cell or detecting the second reference signal of the first neighboring cell according to the auxiliary information Or detecting the first reference signal and the second reference signal of the first neighboring cell, and acquiring a cell identifier ID or a virtual ID of the first neighboring cell.
- cell discovery is accurately performed, which solves the defect that the cell discovery interference is large in the case of dense deployment of small base stations in the prior art.
- the eighth embodiment of the present invention provides a base station 20, where the base station 20 is a serving base station of the UE.
- the base station 20 may include
- At least one processor 1201 a memory 1202; at least one communication bus 1203 for implementing connections and mutuals between the processor 1201, the memory 1202, and other modules not shown Communication; transmitter 1204;
- the communication bus 1203 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (abbreviated as EISA) Bus, etc.
- ISA Industry Standard Architecture
- PCI Peripheral Component
- EISA Extended Industry Standard Architecture
- the bus 1203 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.
- the processor 1201 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
- CPU central processing unit
- ASIC application specific integrated circuit
- the processor 1201 is configured to acquire a first reference signal sending parameter of the first neighboring cell and a sending parameter of the second reference signal;
- the processor 1201 is further configured to: generate, according to the obtained sending parameter of the first reference signal of the first neighboring cell and the sending parameter of the second reference signal, the auxiliary information, where the auxiliary information includes the second reference signal of the first neighboring cell Resource information
- the transmitter 1204 is configured to send the generated auxiliary information to the UE in the cell, so that the UE performs cell discovery.
- the second reference signal of the first neighboring cell may be an NZP-CSI-RS of the first neighboring cell or an NZP-CSI-RS of the first neighboring cell;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell is a class of the PSS or the first neighboring cell.
- the resource information of the second reference signal of the first neighboring cell may include the following At least one of the information:
- the second reference signal resource configuration of the first neighboring cell the number of antenna ports of the second reference signal of the first neighboring cell, and the subframe information of the second reference signal of the first neighboring cell.
- the auxiliary information may further include: a cell ID of the first neighboring cell, and a first reference signal ID of the first neighboring cell.
- auxiliary information may further include: a scrambling code ID of the second reference signal of the first neighboring cell.
- the auxiliary information may further include: first, the first neighboring cell The sub-frame deviation P of the reference signal from the second reference signal of the first neighboring cell; wherein P is greater than or equal to 1.
- the embodiment of the present invention provides a base station 30, which is configured to enable a UE to perform cell discovery by transmitting auxiliary information, where the auxiliary information includes resource information of a second reference signal of the first neighboring cell, where the first neighboring cell is a serving base station of the UE. Any neighboring cell.
- cell discovery is accurately performed, which solves the defect that the cell discovery interference is large in the case of dense deployment of small base stations in the prior art.
- the ninth embodiment of the present invention provides a base station 40, where the base station 40 is a base station corresponding to the first neighboring cell.
- the base station 40 may include
- At least one processor 1301 a memory 1302; at least one communication bus 1303 for implementing connection and mutual communication between the processor 1301, the memory 1302, and other modules not shown; the transmitter 1304;
- the communication bus 1303 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (abbreviated as EISA) Bus, etc.
- the bus 1303 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 13, but it does not mean that there is only one bus or one type of bus.
- Memory 1302 can be a random access memory and provides instructions and data to processor 1301. A portion of memory 1302 may also include non-volatile line random access memory (NVRAM).
- NVRAM non-volatile line random access memory
- the memory 1302 can be used to store all of the information contained in the distributed lock management device during the distributed lock management process.
- the processor 1301 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
- CPU central processing unit
- ASIC application specific integrated circuit
- the second reference signal of the first neighboring cell may be an NZP-CSI-RS of the first neighboring cell or an NZP-CSI-RS of the first neighboring cell;
- the generated scrambling code ID of the NZP-CSI-RS is different from the generated scrambling ID of the NZP-CSI-RS.
- the first reference signal of the first neighboring cell may be the PS S of the first neighboring cell or the PS S of the first neighboring cell;
- the generated root sequence number of the PSS is different from the generated root sequence number of the PS S.
- the processor 1301 may be specifically configured to:
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to four resources in each resource block; or
- the second reference signal of the first neighboring cell is transmitted by one antenna port, and the second reference signal of the first neighboring cell is mapped to 8 resource units in each resource block; or the second reference signal of the first neighboring cell is Two antenna ports are transmitted, and the second reference signal of the first neighboring cell is mapped on the four resource units in each resource block; or the second reference signal of the first neighboring cell is transmitted by two antenna ports, the first neighboring cell
- the second reference signal of the cell is mapped in 8 resource units in each resource block.
- the sequence length of the second reference signal of the first neighboring cell is Q times the number of resource blocks included in the maximum system bandwidth, where Q is a positive integer greater than 1.
- the processor 1301 can also be used, And determining, according to the cell ID of the first neighboring cell and the configured number of resources, a location of the sending resource of the second reference signal of the first neighboring cell.
- processor 1301 may be specifically configured to:
- the transmission resource location of the second reference signal of the first neighboring cell is calculated by the PS S ID of the first neighboring cell.
- the processor 1301 may be specifically configured to:
- the transmission resource location of the second reference signal of the first neighboring cell is calculated by the SS S ID of the first neighboring cell.
- the processor 1301 may be specifically configured to:
- the resource configured by the first neighboring cell is a set of S resources, and each resource set includes T resources, and the sending resource set of the second reference signal of the first neighboring cell is determined according to the PSS ID of the first neighboring cell;
- the S SS ID determines the location of the transmission resource of the second reference signal of the first neighboring cell within the set of transmission resources.
- the transmitter 1304 can also be used for,
- the transmitter 1304 is further configured to: send the sending parameter of the first reference signal of the first neighboring cell and the sending parameter of the second reference signal of the first neighboring cell to all neighboring cells of the first neighboring cell. So that the UEs in all neighboring cells of the first neighboring cell perform cell discovery.
- the disclosed system, apparatus, and method may be implemented in other manners.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
- the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
- the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.
- the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
- the above software functional unit is stored in a storage medium
- a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform some of the steps of the methods described in various embodiments of the present invention.
- the foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a disk or an optical disk, and the like, which can store program codes. Medium.
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Abstract
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Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201480011032.XA CN105122894A (zh) | 2014-01-26 | 2014-01-26 | 一种用户设备、基站及小区发现的方法 |
| PCT/CN2014/071520 WO2015109585A1 (zh) | 2014-01-26 | 2014-01-26 | 一种用户设备、基站及小区发现的方法 |
| JP2016548298A JP2017510141A (ja) | 2014-01-26 | 2014-01-26 | ユーザイクイップメント、基地局及びセル探索方法 |
| EP14880199.6A EP3091793A4 (en) | 2014-01-26 | 2014-01-26 | User equipment, base station and cell discovery method |
| US15/219,481 US20160337952A1 (en) | 2014-01-26 | 2016-07-26 | User equipment, base station, and cell discovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/071520 WO2015109585A1 (zh) | 2014-01-26 | 2014-01-26 | 一种用户设备、基站及小区发现的方法 |
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| EP3780749B1 (en) * | 2014-01-30 | 2022-11-09 | Telefonaktiebolaget LM Ericsson (publ) | Discovery signals and procedures |
| EP3122116B1 (en) * | 2014-03-20 | 2021-05-05 | Sharp Kabushiki Kaisha | Terminal device and base station device |
| US10098059B2 (en) | 2016-04-29 | 2018-10-09 | Qualcomm Incorporated | Discovering physical cell identifiers in wireless communications |
| US10849026B2 (en) * | 2016-05-13 | 2020-11-24 | Qualcomm Incorporated | Method and apparatus of uplink and downlink based handover |
| US10491352B1 (en) * | 2016-10-27 | 2019-11-26 | Sprint Spectrum L.P. | Configuring reference-signal transmission in a wireless communication system based on azimuths and distances |
| CN108282298B (zh) * | 2017-01-06 | 2023-04-11 | 中兴通讯股份有限公司 | 一种参考信号传输方法及装置 |
| EP3583735B1 (en) | 2017-03-23 | 2022-04-27 | Samsung Electronics Co., Ltd. | Methods and apparatuses for measurement configuration of different reference signals and cell measurement report mechanism |
| US10834760B2 (en) * | 2017-03-24 | 2020-11-10 | Qualcomm Incorporated | Mobility enhancement with channel state information reference signals (CSI-RS) |
| US20190166513A1 (en) * | 2017-11-28 | 2019-05-30 | Mediatek Inc. | CSI-RS Radio Resource Management (RRM) Measurement |
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| KR20090009693A (ko) * | 2007-07-20 | 2009-01-23 | 한국전자통신연구원 | 하향링크 프레임 생성 방법 및 셀 탐색 방법 |
| EP2249484A1 (en) * | 2009-05-05 | 2010-11-10 | St-NXP Wireless France SAS | PSS detection process for an LTE communication network |
| WO2011115421A2 (en) * | 2010-03-17 | 2011-09-22 | Lg Electronics Inc. | Method and apparatus for providing channel state information-reference signal (csi-rs) configuration information in a wireless communication system supporting multiple antennas |
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- 2014-01-26 JP JP2016548298A patent/JP2017510141A/ja active Pending
- 2014-01-26 WO PCT/CN2014/071520 patent/WO2015109585A1/zh not_active Ceased
- 2014-01-26 EP EP14880199.6A patent/EP3091793A4/en not_active Withdrawn
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2016
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Also Published As
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| EP3091793A1 (en) | 2016-11-09 |
| JP2017510141A (ja) | 2017-04-06 |
| US20160337952A1 (en) | 2016-11-17 |
| EP3091793A4 (en) | 2017-01-25 |
| CN105122894A (zh) | 2015-12-02 |
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