WO2013135210A1 - 小区配置方法和同步方法,用户设备和基站 - Google Patents
小区配置方法和同步方法,用户设备和基站 Download PDFInfo
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- WO2013135210A1 WO2013135210A1 PCT/CN2013/072804 CN2013072804W WO2013135210A1 WO 2013135210 A1 WO2013135210 A1 WO 2013135210A1 CN 2013072804 W CN2013072804 W CN 2013072804W WO 2013135210 A1 WO2013135210 A1 WO 2013135210A1
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- Prior art keywords
- cell
- synchronization
- user equipment
- base station
- system information
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Classifications
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0092—Indication of how the channel is divided
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/04—Traffic adaptive resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a cell configuration method and a method, a user equipment, and a base station for implementing synchronization between a user equipment and a base station.
- Existing wireless communication systems basically employ cellular systems.
- a cellular system the entire system is divided into multiple cells, and the same time-frequency resources may be used in each cell or in multiple cells that are spaced apart by more than a certain distance.
- network planning is required.
- the location of each base station in the network and the base station correspond to several cells respectively.
- the cell identifier (ID) of each cell and other multiple system information (including carrier frequency and bandwidth, etc.) of the cell used by each cell are required to be planned.
- each base station After the network planning is completed, each base station sends a signal according to the system information of the already planned cell. Each user equipment needs to search for a cell and access the cell when accessing the network. The other relevant system information of the cell is then read from the broadcast channel, and then each user equipment establishes a communication connection with the base station based on the cell system information such as cell ID/carrier carrier frequency/system bandwidth/number of antennas.
- each cell ID and corresponding system information are fixed.
- the network system planned by such a network can only be used to provide services for user equipment, but not because of the distribution of user equipment or the distribution of business requirements.
- the cell system information in the network is adjusted to adjust the cell to adapt to the change. For example, when one or more new cells join the network, in order to allocate the cell ID to the new cell, network planning needs to be re-established for the entire network. If the new cell is a temporary cell or the cell location changes frequently, network planning is re-performed for each change, thereby increasing the complexity of network maintenance. However, if the new cell is allowed to be randomly selected by its own cell ID, it is likely to cause large inter-cell interference or unsuitable for the distribution of services within the network.
- the macro cell and the micro cell may use different cell IDs; if the main requirement of the network is to obtain more For good inter-cell cooperation, the macro cell and the micro cell can use the same cell ID.
- the existing network cannot meet the above requirements because the cell ID is planned and cannot be changed during network planning.
- the user equipment when establishing a communication connection with the cell, the user equipment needs to establish downlink initial synchronization and synchronization tracking with the base station, and receive the data transmitted by the base station on the basis of the synchronization, and the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) data.
- the base station On the uplink, the base station is required to indicate a certain Timing Advance (TA) of the user equipment, and the user equipment determines the uplink transmission time according to the accumulation of ⁇ received from the base station, a predefined offset value, and downlink synchronization.
- TA Timing Advance
- the user equipment In the Dynamic Point Selection (DPS) transmission mode, the user equipment needs to establish synchronization with multiple nodes. However, the user equipment does not know which reference signals to synchronize based on, which synchronization to receive the PDSCH and which synchronization to determine the uplink transmission time.
- DPS Dynamic Point Selection
- a cell configuration method is provided, and the implementation between the user equipment and the base station is implemented. Step method, user equipment and base station.
- the embodiment of the present invention provides a cell configuration method, including: determining, by a first base station, a system information of a second cell, where the first base station notifying the system information to a second cell corresponding to the second cell a base station, such that the second base station transmits and receives a signal according to the system information.
- an embodiment of the present invention provides a cell configuration method, including: receiving, by a user equipment in a first cell, system information of a second cell from a first base station corresponding to the first cell; The information communicates with the second base station corresponding to the second cell.
- the embodiment of the present invention provides a base station, corresponding to the first cell, including: a determining unit, configured to determine system information of the second cell; and a sending unit, configured to notify the system information to the second The second base station corresponding to the cell, so that the second base station sends and receives a signal according to the system information.
- the embodiment of the present invention provides a user equipment, including: a receiving unit, configured to receive system information of a second cell from a first base station corresponding to a first cell; and a communications unit, configured to use, according to the system information, The second base station corresponding to the second cell performs communication.
- the system information of the cell can be dynamically or semi-statically adjusted according to the user equipment distribution and the service distribution, so that the resources of the network can be better provided to the required user equipment, and the user equipment is improved.
- the ability of the service while reducing the requirements for network planning, makes the establishment of a wireless communication network easier, and enhances the network's ability to adjust.
- an embodiment of the present invention provides a method for implementing synchronization between a user equipment and a base station, including: determining configuration information of at least one reference signal RS resource group or port group; and transmitting the configuration information to the user equipment, And causing the user equipment to establish synchronization according to the configuration information of the at least one RS resource group or port group.
- an embodiment of the present invention provides a method for implementing synchronization between a user equipment and a base station, including: receiving configuration information of at least one reference signal RS resource group or port group; The RS resource group or port group establishes synchronization respectively.
- a base station including: a determining unit, configured to determine configuration information of at least one reference signal RS resource group or port group; and a sending unit, configured to send the configuration information to a user And the device, so that the user equipment establishes synchronization according to the configuration information of the at least one RS resource group or port group.
- an embodiment of the present invention provides a user equipment, including: a receiving unit, configured to receive configuration information of at least one reference signal RS resource group or a port group; and a synchronization unit, configured to perform, according to the configuration information, each One of the RS resource groups or port groups establishes synchronization respectively.
- the user equipment can correctly receive data on the PDSCH channel, and the uplink subframe transmission timing can be correctly determined.
- FIG. 1 is a flow chart showing a cell configuration method according to an embodiment of the present invention
- FIG. 2 is a flowchart showing a cell configuration method according to another embodiment of the present invention
- FIG. 3 is a schematic diagram showing a flowchart of performing communication after the second base station and the user equipment respectively receive the system information sent by the first base station in the embodiment;
- FIG. 4 shows a flow chart of a synchronization method in accordance with an embodiment of the present invention
- FIG. 5 is a flow chart showing a synchronization method according to another embodiment of the present invention.
- FIG. 6 shows a flow chart of a synchronization method in accordance with another embodiment of the present invention.
- FIG. 7 is a flow chart showing a synchronization method according to another embodiment of the present invention.
- FIG. 8 shows a flow chart also proposing a synchronization method according to another embodiment of the present invention
- FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
- FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- FIG. 12 shows a schematic structural diagram of a base station according to an embodiment of the present invention.
- FIG. 1 is a flowchart of a cell configuration method according to an embodiment of the present invention. It can be seen that the method includes:
- Step 110 The first base station corresponding to the first cell determines system information of the second cell.
- the system information of the second cell includes a cell identity (Cell ID, Cell ID) of the second cell, a carrier carrier frequency, a carrier system bandwidth, and a cyclic prefix (CP). Length, number of antennas, Physical hybrid-ARQ indicator channel (PHICH) configuration information, Reference Signal (RS) transmit power, Time Division Duplexing (TDD) subframe One or more of a ratio, Almost Blank Subframe (ABS) configuration, maximum transmit power/power adjustment, subframe silence, and subband silence.
- the cell identifier may be a physical cell identifier.
- the system information may be initialization system information of the second cell, or may be updated system information.
- the initialization system information is system information for first configuring the second cell.
- the updated system information is system information for reconfiguring the second cell system information after it is first configured. That is, the system information of the second cell is previously set, and the updated system information refers to system information for updating the system information.
- determining system information may be one of determining system information Item or multiple, such as determining only the cell ID, or simultaneously determining the cell ID and carrier carrier frequency.
- the system information may further include activation state information of the second cell. The activation status information is used to indicate whether system information of the second cell is activated, when is activated, and one or more of the activation durations.
- the first base station may determine all system information of the second cell, or may plan part or all of system information of the second cell during network planning, and the first base station determines the second cell. Part or all of the system information.
- the second base station corresponding to the second cell uses the system information determined by the first base station.
- the first cell may include the second cell on the cell coverage, that is, the second cell may be a sub-cell under the coverage of the first cell, or the first cell and the second cell may not overlap, or may The first cell and the second cell partially overlap.
- the first base station corresponding to the first cell may be based on user distribution information or service distribution information in the second cell coverage area according to the first cell, and according to the network side.
- the cell ID, carrier frequency, etc. that have been used are used to determine the system information of the second cell.
- the first base station corresponding to the first cell may use the network side (for example, the base station controller, the core network)
- the device or other network side device calculates the user distribution information or the service distribution information of the second cell, and determines the system information of the second cell according to the cell ID, the carrier frequency, and the like that have been used by the network side.
- the interference generated by the second cell in the network using the system information may be considered, that is, the appropriate system information may be selected, so that The second cell generates the least interference in the entire network or part of the network when using the system information, or the generated interference is lower than a preset threshold.
- the system information includes the cell ID
- the cell ID may be the same as or different from the cell ID of the neighboring cell according to the network requirement
- the cell ID of the determined second cell may be the cell ID of the first cell. The same, can also be different.
- the determined system information of the second cell may be the first
- the corresponding system information of the cell is the same or different, and the system information used by the second cell is determined to be orthogonal to the system information of the first cell, for example, the system bandwidth used is orthogonal.
- step 110 can trigger execution when predetermined conditions are met. For example,
- the first base station corresponding to the first cell determines the cell ID of the second cell
- Condition 1 the interference generated by the scrambling code between the multiple cells corresponding to the first base station is higher than the first predetermined threshold
- Condition 2 The second cell is a cell that newly joins the network and has not been initially configured;
- Condition 3 The control channel capacity requirement within the coverage of the first base station exceeds the control channel capacity currently available.
- the low-interference cell ID set associated with each cell ID that has been used in the network may be pre-stored or acquired from other network devices, and each of the low-interference cell ID sets and the selected one The interference of the set associated cell IDs when used simultaneously is lower than the first predetermined threshold.
- the first base station first determines a low-interference cell ID set associated with a cell ID of a neighboring cell around the second cell, and then sets a plurality of low-interference cell IDs from the plurality of low-interference cell IDs. Intersect or collectively select one cell ID as the cell ID of the second cell.
- the first base station may use the cell ID that is different from the neighboring cell of the second cell as the cell ID of the second cell.
- the first base station corresponding to the first cell determines a carrier carrier frequency and/or a system bandwidth of the second cell when the following condition 4 or condition 5 is satisfied;
- Condition 4 The interference of the second cell to one or more neighboring cells is higher than the second predetermined threshold;
- Condition 5 The traffic density in the coverage of the second cell is less than the second predetermined threshold.
- the first base station may use a traversal manner from the first Finding at least one carrier carrier frequency in a carrier carrier frequency that is available to the second cell, so that the interference level between the second cell and the surrounding cell after the second cell uses the carrier carrier frequency and/or system bandwidth is lower than the second predetermined threshold value .
- the carrier of the second cell may be adjusted from the first carrier to the second carrier, or the system bandwidth is adjusted from 10 MHz to 5 MHz; or the system bandwidth is adjusted from 10 MHz to the first 5 MHz while the carrier frequency is also adjusted together.
- the first base station corresponding to the first cell determines the number of antennas of the second cell
- Condition 7 When the number of CSI-RS resources in the area where the second cell is located is insufficient.
- the first base station changes the second cell from the 4 antenna service to the 2 antenna service, for example, the number of antennas is determined to be 2.
- the first base station corresponding to the first cell determines the RS power and/or the maximum transmit power of the second cell when the following condition 8 is satisfied.
- Condition 8 The interference level between the second cell and the adjacent one or more cells exceeds a predetermined third threshold.
- the first base station When condition 8 is satisfied, the first base station will increase or decrease the RS power and/or the maximum transmit power of the second cell until the third threshold is reached.
- the first base station corresponding to the first cell determines the uplink and downlink subframe ratio of the second cell.
- Condition 9 The interference level between the second cell and the adjacent one or more cells exceeds a predetermined fourth threshold on the uplink or downlink subframe;
- one or more uplink subframes of the second cell are changed to downlink subframes, and/or one or more downlink subframes of the second cell are changed to uplink subframes until the fourth gate is reached.
- Limit requirements are not limited
- the first base station corresponding to the first cell determines the quiet cell of the second cell frame.
- Condition 10 On some subframes, the interference level between the second cell and the adjacent one or more cells exceeds a predetermined fifth threshold
- the first base station silences one or more subframes of the second cell until a fifth threshold requirement is reached.
- the first base station corresponding to the first cell determines a silent sub-band of the second cell.
- Condition 11 On some subbands, the interference level between the second cell and the adjacent one or more cells exceeds a predetermined sixth threshold.
- the first base station silences one or more sub-bands of the second cell until the sixth threshold is reached.
- first to sixth threshold values may be the same or different; the trigger condition may further include conditions opposite to the condition 1 to the condition 11, so that the first base station may perform an adjustment opposite to the above example. Or settings.
- Step 120 The first base station notifies the system information to the second base station corresponding to the second cell, so that the second base station sends and receives a signal according to the system information.
- the first base station when it notifies the system information, it may be performed by any interface between sites or between cells, such as an X2 interface or a private interface.
- the second base station may determine related parameters of the second cell according to the system information, and send and receive signals according to the related parameters. For example, a downlink signal of the second cell is generated based on the system information and/or an uplink signal for the second cell is received.
- the related parameters include a scrambling code sequence, a location of the RS, a synchronization signal, a location of a physical control format indicator channel (PCFICH), or other and the physical Cell ID related parameters.
- the configuring related parameters of the second cell according to the system information includes one of the following steps ad One or more:
- Step a Determine a scrambling code sequence according to the received physical cell ID, so that the second base station corresponding to the second cell uses the scrambling code to perform scrambling and/or descrambling.
- Step b Determine the location of the RS according to the received physical cell ID.
- CRS Cell-spcific Reference Signals
- Step c Determine the synchronization signal according to the received physical cell ID.
- the received physical cell ID may be used to generate a sequence of primary synchronization signals and/or a sequence of secondary synchronization signals.
- Step d Determine the location of the PCFICH according to the received physical cell ID.
- the location of the PCFICH may be the location of the RE corresponding to the PCFICH in the entire bandwidth.
- the related parameters include a CP length:
- Step e Determine whether to use a CP with a normal CP length or a CP with an extended CP length based on the received CP length information.
- Step f determining a subband size according to the received system bandwidth, for example, the system bandwidth is changed from 5 MHz to 10 MHz, so that the corresponding subband size is from 6 RB. Updated to 8RB;
- the related parameters include a codebook size:
- Step g Determine the selected codebook and transmission mode according to the number of received antennas.
- the first base station may pre-determine the effective time of the second cell system information, or notify the second base station of the effective time of the system information. After receiving the system information of the second cell, the second base station starts to use the system information of the corresponding second cell according to the effective time.
- the effective time may be an absolute time.
- the effective time may be used to indicate that the system information is valid immediately after receiving the system information, or the activation status information may include an active frame number or an activated subframe number to indicate Activated on this frame or subframe.
- the effective time may also be a relative time, such as the first subframe after the second base station receives the corresponding system information 100 radio frames, or may indicate the given after receiving the system information.
- the time (for example, 500ms) takes effect.
- the first base station corresponding to the first cell determines the system information of the second cell and sends the system information to the second base station corresponding to the second cell, so that the first base station can implement the second cell. management.
- the first base station may activate the second cell, and notify the user equipment of the activation of the second cell and the system information of the second cell, and the first base station may also close the second cell, and notify the user equipment about the related system information of the second cell being closed, and The user equipment can be notified to switch back to the first cell or to another system information such as the third cell, and so on.
- the term "cell” includes a physical cell or carrier.
- the physical cell refers to a cell corresponding to the physical device
- the cell corresponding to the carrier refers to at least one set of physical devices working on at least one carrier, and each working physical device on each carrier can correspond to one cell.
- the first base station may further send the system information or the system information including the effective time to the user equipment in the first cell, so that the user equipment may update the stored second cell according to the belonging system information.
- the signal between the user equipment and the second base station is implemented by receiving a signal of the second cell or transmitting a signal to the second cell.
- the first base station sends the system information to the second cell or the third cell
- the second cell or the third cell sends the system information to the user equipment in the first cell, so that the user equipment
- the second base station corresponding to the second cell can be communicated according to the system information.
- the first base station may notify the second cell or other cells other than the first and second cells, the system information of the second cell and the effective time of the system information, and then the second cell or the first and second cells. Other cells outside the cell notify the user equipment of the system information or system information including the effective time.
- the first cell and the second cell may correspond to the same base station or different base stations.
- the first cell and the second cell correspond to the same base station, that is, when the first base station and the second base station are the same base station
- the second cell may be notified through the internal interface of the base station or any other interface including the private interface. system message.
- the first base station may notify the second base station corresponding system information of the second cell by using an inter-base station interface or X2 or any other interface including a private interface.
- the first base station may also determine system information of multiple cells at the same time, and notify the determined base station information to the base station corresponding to each cell of the multiple cells, so that each cell corresponds to The base station generates a downlink signal of the corresponding cell according to the system information and/or receives an uplink signal for the corresponding cell.
- the first base station may determine that the system information of the multiple cells is the same, such as determining that multiple cell IDs are the same, or system information of multiple cells is different, such as determining that multiple cell IDs are different, or that multiple cells have the same system bandwidth but corresponding The frequency bands are orthogonal.
- system information of the second cell since the system information of the second cell is determined by the first base station, system information of the cell may be dynamically or semi-statically adjusted according to user distribution and service distribution requirements, thereby enabling network resources to be further It is well provided to the users who need it, and the ability to serve the users is improved. At the same time, the requirements for network planning are reduced, the establishment of a wireless communication network is simpler, and the adjustment capability of the network is enhanced.
- FIG. 2 shows a flow chart of a cell configuration method in accordance with another embodiment of the present invention.
- the steps in this embodiment can be performed on the basis of the embodiment corresponding to FIG. 1.
- the method of this embodiment includes: Step 210:
- the user equipment in the first cell receives the system information of the second d, the area from the first base station corresponding to the first cell.
- the system information may be initialization system information or updated system information, and the system information further includes activation status information, where the activation status information is used to indicate whether the second cell is activated, when is activated, and during an activation duration.
- the system information may also be system information specific to the user equipment. The descriptions of the cell and system information in the embodiment corresponding to FIG.
- the system information may be notified to the user equipment by using a broadcast message, or may be notified to the user equipment by using high-level signaling such as user equipment signaling, such as RRC signaling.
- Step 220 The user equipment communicates with the second base station corresponding to the second cell according to the system information.
- the user equipment may determine, according to the system information, related parameters that are required to be used for communication with the second cell, where the related parameters are The same in the embodiment, such as when the system information includes a physical cell
- the ID, the related parameters include a scrambling code sequence, a location of the RS, a synchronization signal, a location of the PCFICH, or other parameters related to the physical cell ID.
- the manner in which the relevant parameters are determined is also the same as in the above embodiment. Since the second base station has previously adjusted the relevant parameters according to the system information, and sends and receives signals according to the system information, the second base station and the user equipment both adjust related parameters according to the system information, Therefore, the user equipment can receive the signal or the transmission signal of the second cell according to the related system information, so that communication can be performed between the user equipment and the second base station.
- the method further comprises receiving the time when the second cell system information is updated, and updating the system information of the corresponding second cell according to the time when the system information is updated.
- FIG. 3 is a schematic flowchart showing communication performed after the second base station and the user equipment respectively receive the system information sent by the first base station in this embodiment.
- the first base station in the first cell sends the system information of the second cell to the second base station and the user equipment.
- the system information may be valid at the same time in the second base station and the user equipment, or the system information may be first effective in the second base station, and then validated in the user equipment, etc., which does not affect the essence of the present invention.
- a connection link or a connection link may be established between the second base station and the user equipment.
- the system information of the second cell is determined by the first base station, so that the system information of the cell can be dynamically or semi-statically adjusted according to the needs of the user distribution and the demand of the service distribution, thereby being able to
- the resources of the network are better provided to the users in need, the ability to serve the users is improved, the requirements for network planning are reduced, the establishment of the wireless communication network is simpler, and the automatic adjustment capability of the network is enhanced.
- a method of implementing synchronization between a user equipment and a base station is also proposed.
- the user equipment may be based on a predefined or base station configured primary synchronization signal (PS S) / A secondary synchronization signal (SSS) is used to establish an initial synchronization, and then synchronization is established according to the corresponding multiple CSI-RS resources and the initial synchronization.
- PS S primary synchronization signal
- SSS secondary synchronization signal
- FIG. 4 shows a flow chart of a synchronization method in accordance with an embodiment of the present invention. As can be seen, the method includes the following steps:
- Step 410 Determine configuration information of at least one Reference Signal (RS) resource group or port group.
- the RS may include a Channel-State Information-Reference Signal (CSI-RS) and a Cell-Specific Reference Signals (CRS).
- CSI-RS Channel-State Information-Reference Signal
- CRS Cell-Specific Reference Signals
- a resource group can include one or more resources
- a port group can include one or more ports.
- Step 420 Send the configuration information to the user equipment, so that the user equipment establishes synchronization according to the configuration information of the at least one RS resource group or the port group.
- the configuration of the RS resource group or the port group includes a pilot pattern, a bandwidth, a frequency domain location, a period, a subframe offset, and the like of each RS resource or port in the corresponding RS resource group or port group.
- One implementation is to notify the user equipment of all of the RS resource groups or port groups used for synchronization.
- the configuration parameters of the RS resource or port, and the configuration parameters may include parameters such as a pilot pattern, a bandwidth, a frequency domain position, a period, and a subframe offset.
- One embodiment is to notify the user equipment to establish synchronization of each RS resource or port in all existing RS resource groups or port groups according to the currently notified parameters.
- An embodiment may be an RS resource group or a port group that is used to notify the user equipment for synchronization, and notify each RS resource group or port group of certain configuration information for synchronization, and the user equipment overwrites the notified configuration information.
- the RS resources or ports correspond to the existing configuration information to obtain RS resources or ports for synchronization, and establish synchronization according to the RS resources or ports. For example, the synchronization is established using the CSI-RS resources No. 0, 1, and 2 that have been notified to the user equipment, where each CSI-RS resource is used as a resource group, and the corresponding configuration information about the bandwidth is the CSI for synchronization.
- the user equipment synchronizes only the three CSI-RS resources of the six RBs in the center of the frequency band.
- the three CSI-RS resource groups used for informing the user equipment for synchronization include the CSI-RS resources of the 0th, 1st, and 2th, respectively, and the corresponding period is 5ms, but when corresponding to the synchronization.
- the configuration information is 20 ms
- the user equipment synchronizes on the corresponding three CSI-RS resources using only the 20 ms period.
- the RS port is used for synchronization, the RS port is a port of the RS resource or a set of multiple ports. For example, the first port or the first two ports of a 4-port CSI-RS resource may be used. Synchronize.
- the RS configuration for synchronization may also multiplex RSs within a measurement set (a set of corresponding RSs for measuring channel state information) or a feedback set (a set of corresponding RSs for determining feedback information) Configuration. That is to say, the measurement set or the feedback set is also the RS set for synchronization, and the RS configuration may already be included in the measurement set or the feedback set, which may be directly determined in step 410 using such a configuration in the measurement set or the feedback set. Configuration information of the RS resource group or port group that needs to be synchronized. After receiving the configuration information of the measurement set or the feedback set, the user equipment establishes synchronization based on the CSI-RS, CRS resource or port configuration, respectively.
- the measurement set includes the CSI-RS resources 0, 1, and 2, and each CSI-RS resource corresponds to 4 ports.
- the entire bandwidth, the length is 20ms, and the subframe offset is equal to 5, and the 0th, 1st, and 2nd CSI-RS resources respectively correspond to the pilot patterns 0, 1, and 2, and the user equipment directly uses the corresponding 3 CSI-RS resources. Establish synchronization separately.
- the CSI-RS resource or the CSI-RS port in the set may be further notified to be a CSI-RS resource group or a CSI-RS port group that needs to be synchronized, where each resource group includes A resource, each port group includes at least one port (the number of ports in each port group may be predefined, such as the first two ports corresponding to one port or resource).
- the configuration information of some or all of the CSI-RS resources or the CSI-RS ports in the measurement set or the feedback set is used for synchronization, and the user equipment uses the current notification when synchronizing certain RS resources or ports. Corresponding configuration information for synchronization, rather than corresponding configuration information of an existing RS resource or port.
- the measurement set includes the CSI-RS resources No. 0, 1, and 2, and each CSI-RS resource corresponds to 4 ports, the entire bandwidth, the period of 20 ms in length, and the subframe offset is equal to 5,
- the CSI-RS resources of 0, 1, and 2 correspond to the pilot patterns 0, 1, and 2, respectively, but the period of 40 ms is used for synchronization, and the user equipment uses the 0, 1, and 2 of the period of 40 ms in length. No. CSI-RS resources to establish synchronization separately.
- the user equipment can establish one or more synchronizations.
- the establishment of the synchronization may also be implemented by the user equipment according to certain trigger conditions.
- the trigger condition may be that some measurement or feedback needs to be performed according to the synchronized CSI-RS/CRS resource or port, and the pre-synchronization is required, or
- the reference signal received power or the reference signal received quality corresponding to the CSI-RS/CRS resource or the port that needs to be synchronized may exceed a certain threshold, and may be other trigger conditions that can be conceived.
- the synchronization may be replaced by synchronous tracking, timing, etc., and the above method is still applicable.
- the user equipment may be synchronized according to the configuration information of each of the resource groups or port groups, thereby solving the problem that the user equipment does not know according to which The reference signal is synchronized.
- Figure 5 shows the present according to the present invention A flowchart of a synchronization method of the embodiment.
- steps 410 and 420 are identical to the steps shown in Fig. 4 and will not be repeated here.
- Step 430 Determine first synchronization information that the user equipment needs to refer to to receive the physical downlink shared channel PDSCH.
- the first synchronization information may be determined by the station itself, or the base station may obtain the first synchronization information by other means.
- determining the first synchronization information may be performed by: first determining a transmitting node that uses the physical downlink shared channel, and then determining synchronization corresponding to the RS resource group or the RS port group transmitted by the transmitting node as the first synchronization information.
- Step 440 Send the first synchronization information to the user equipment, so that the user equipment determines the synchronization to be used according to the first synchronization information to receive data from the PDSCH. Since the user equipment may establish multiple synchronizations with the base station in step 410, the base station determines that the user equipment needs to receive data on the PDSCH according to which synchronization, that is, determines the first synchronization information. In this step 440, the base station can transmit the first synchronization information to the user equipment in multiple manners. For example, in the Dynamic Point Selection (DPS) mode, the first synchronization information may be transmitted through Downlink Control Information (DSI) notification; in a single node service mode, the radio resource may be controlled.
- DPS Dynamic Point Selection
- DSI Downlink Control Information
- the first synchronization information may be transmitted through RRC signaling or DCI notification,
- the user equipment can be notified to synchronize using the CSI-RS corresponding to the nearest node.
- RRC Radio Resource Control
- JT Joint Transmission
- the first synchronization information When the first synchronization information is notified, it may be notified according to the number of the RS resource group or the port group used for synchronization, such as the RS resource group or the port group used for synchronization, in the order when the base station notifies the RS resource for synchronization. When the first synchronization information is notified, only the number corresponding to the corresponding RS resource group or port group is notified. You can also use bitmap mapping (bitmap) In this case, each bit in the bitmap corresponds to one RS resource group or port group for synchronization, and the bit corresponding to the first synchronization is set to 1, and the other bits are set to 0, so that the first synchronization information can be effectively notified by using the bitmap.
- bitmap mapping bitmap mapping
- the user equipment can select the required synchronization according to the indication of the base station to receive the PDSCH data, so as to correctly receive the data on the PDSCH.
- FIG. 6 shows a flow chart of a synchronization method in accordance with an embodiment of the present invention. In the method shown in Fig. 6, it is explained how to determine the uplink transmission time based on the downlink synchronization. As can be seen from Fig. 6, step 410 and step 420 are identical to the steps shown in Fig. 4 and will not be repeated here.
- Step 450 Determine second synchronization information that needs to be referenced when the user equipment sends an uplink signal.
- the second synchronization information may be determined by the station itself, or the base station may obtain the second synchronization information by other means.
- Step 460 Send the second synchronization information to the user equipment, so that the user equipment can determine, according to the second synchronization information, a transmission moment of sending an uplink signal.
- the base station determines second synchronization information that the user equipment needs to refer to in the uplink direction. For example, the base station determines that the second synchronization of the user equipment is that a certain user equipment has been established. Synchronization (determined method may be that the same synchronization is always used as the second synchronization, or the synchronization corresponding to the node that receives the uplink information of the user equipment is determined as the second synchronization), and the user equipment needs to determine the uplink transmission time according to the timing of the synchronization. Adjusted reference value.
- the uplink transmission time for transmitting the uplink information may be determined according to the synchronization and the uplink TA.
- the user equipment may determine a timing offset before and after the second synchronization change, and determine an uplink transmission time for transmitting the uplink data according to the timing offset and the parameters of the second synchronization and the uplink TA.
- the second synchronization changes from the synchronization A to the synchronization B, and the synchronization timing deviation between the synchronizations A and B is Aoffset.
- the method of notifying the second synchronization information may be the same as the method of notifying the first synchronization information, such as notifying the number of the corresponding synchronization or using the bitmap map to notify the second synchronization that needs to be used.
- the method may further include: notifying the user equipment whether the timing offset compensation needs to be performed, and determining, by the user equipment, that the timing offset compensation is needed or not needed according to the notification.
- the user equipment first determines the timing compensation offset, and then adjusts TA to ⁇ ' according to the timing offset compensation, and then determines the uplink transmission time according to the TA' and the second synchronization notified by the base station.
- the predefined user equipment can perform timing compensation according to certain triggering conditions, such as the user equipment determining whether the second synchronization change exceeds a predetermined threshold, and when the second synchronization changes exceed a predetermined threshold
- the time limit is adjusted by the user equipment according to the timing deviation changed by the second synchronization.
- the user equipment can send the uplink signal according to the uplink transmission time determined by the second synchronization.
- FIG. 7 shows a flow chart of a synchronization method in accordance with another embodiment of the present invention. It can be seen that the method includes: Step 710: Determine configuration information of at least one Reference Signal (RS) resource group or port group.
- RS can include CSI-RS and CRS.
- Step 720 Send the configuration information to the user equipment, so that the user equipment establishes synchronization with the base station based on each of the resource groups or port groups according to the configuration information.
- Step 730 Determine first synchronization information that the user equipment needs to refer to receive the physical downlink shared channel PDSCH.
- Step 740 Send the first synchronization information to the user equipment, so that the user equipment determines the synchronization to be used according to the first synchronization information to receive data from the PDSCH channel.
- Step 750 Determine second synchronization information that needs to be referenced when the user equipment sends the uplink data.
- Step 760 Send the second synchronization information to the user equipment, so that the user equipment can determine the transmission moment of sending the uplink signal according to the second synchronization information.
- steps 750 and 760 may be performed first, and then steps 730 and 740 may be performed without changing the essence of the embodiments of the present invention, which is within the scope of the embodiments of the present invention.
- the uplink synchronization and the downlink synchronization of the user equipment are determined, so that communication between the user equipment and the base station can be performed in the uplink and downlink directions.
- the steps of the above method reference may be made to the descriptions previously described in connection with Figs. 4 to 6, which are not repeated here.
- FIG. 8 shows a flow chart of the method. It can be seen that the method includes: Step 810: Receive configuration information of at least one reference signal RS resource group or port group that needs to be synchronized; Step 820: Establish, according to the configuration information, each of the RS resource groups or port groups respectively. Base station synchronization.
- the method further includes: receiving first synchronization information corresponding to the PDSCH; determining, according to the first synchronization information, synchronization required to receive data from the PDSCH channel.
- the method further includes: receiving second synchronization information that needs to be referenced when transmitting the uplink signal; determining, according to the second synchronization information, a transmission moment of transmitting the uplink signal.
- the method further includes: receiving signaling for whether offset compensation is required for timing; and compensating for the changed second synchronization according to a timing offset before and after the second synchronization change.
- the method further includes: determining whether a change in the second synchronization exceeds a predetermined threshold; when exceeding a predetermined threshold, adjusting according to a timing offset that is changed by the second synchronization The timing of the second synchronization.
- the method further comprises: establishing an initial synchronization according to a pre-defined or base station configured primary synchronization signal and/or secondary synchronization signal PSS/SSS.
- FIG. 9 shows a schematic structural diagram of a base station according to an embodiment of the present invention. It can be seen that the base station 900 includes: a determining unit 910, configured to determine system information of the second cell; and a sending unit 920, configured to notify the system information to the second base station corresponding to the second cell, so that the second base station A signal is transmitted and received according to the system information.
- a determining unit 910 configured to determine system information of the second cell
- a sending unit 920 configured to notify the system information to the second base station corresponding to the second cell, so that the second base station A signal is transmitted and received according to the system information.
- the determining unit 910 is specifically configured to: dynamically or semi-statically update system information of the second cell; or trigger the first base station to determine the second cell when a predetermined condition is met. System information.
- the sending unit 920 is configured to send the system information to a user equipment in a first cell, so that the user equipment can communicate with a second base station corresponding to the second cell according to the system information; Or the sending unit 920 is configured to send the system information to the second cell or the third cell, where the second cell or the third cell sends the system information to the user equipment in the first cell, so that the user equipment The second base station corresponding to the second cell can be communicated according to the system information.
- the sending unit 920 further informs the user equipment of the time when the second cell system information is valid, so that the user equipment updates the system information of the corresponding second cell according to the time when the system information is valid.
- FIG. 10 shows a schematic structural diagram of a user equipment according to an embodiment of the present invention.
- the user equipment 1000 includes: a receiving unit 1010, configured to receive system information of a second cell from a first base station corresponding to the first cell; and a communication unit 1020, And configured to perform communication according to the system information with a second base station corresponding to the second cell.
- the communication unit 1020 may also include the communication unit 1010, and the drawings are not limited to being independent units.
- the user equipment further includes an updating unit 1030, the receiving unit 1010 receives a time when the second cell system information is valid, and the updating unit 1030 is configured to update the corresponding time according to the time when the system information takes effect. System information of the second cell.
- a base station is also proposed.
- Fig. 11 shows a schematic structural diagram of a base station according to an embodiment of the present invention.
- the base station 1100 includes: a determining unit 1110, configured to determine configuration information of at least one reference signal RS resource group or port group; and a sending unit 1120, configured to send the configuration information to the user equipment, so that the user equipment is configured according to the The configuration information of the at least one RS resource group or the port group is synchronized.
- the determining unit 1110 is configured to determine first synchronization information that the user equipment needs to refer to receive the physical downlink shared channel PDSCH, and the sending unit 1120 is configured to send the first synchronization information to the user equipment, so that the user equipment Determining the synchronization to be used to determine data to be received from the PDSCH based on the first synchronization information.
- the determining unit 1110 is configured to determine second synchronization information that needs to be referenced when the user equipment sends an uplink signal
- the sending unit 1120 is configured to send the second synchronization information to the user equipment, so that the user equipment can Determining a transmission timing of transmitting the uplink signal according to the second synchronization information.
- the base station further includes: a notification unit 1130, configured to notify the user equipment whether offset compensation needs to be performed on the uplink timing advancement, so that the user equipment can determine the uplink transmission time according to the timing deviation before and after the second synchronization change. .
- the notification unit 1130 is configured to notify the user equipment primary synchronization signal and/or the secondary synchronization signal PSS/SSS, so that the user equipment establishes initial synchronization according to the primary synchronization signal and/or the secondary synchronization signal.
- a user equipment is also proposed.
- FIG. 12 shows a schematic structural diagram of a base station according to an embodiment of the present invention. It can be seen that the user equipment 1200 includes: a receiving unit 1210, configured to receive configuration information of at least one reference signal RS resource group or port group; and a synchronization unit 1220, configured to perform, according to the configuration information, each of the RS resource groups or The port groups are synchronized separately.
- the user equipment further includes a determining unit 1230, the receiving unit 1210 is configured to receive first synchronization information corresponding to the PDSCH, and the determining unit 1230 is configured to determine, according to the first synchronization information, required use. Synchronization to receive data from the PDSCH.
- the receiving unit 1210 is configured to receive second synchronization information that needs to be referenced when transmitting an uplink signal
- the determining unit 1230 is configured to determine a transmission moment of the transmission signal according to the second synchronization information.
- the receiving unit 1210 is configured to receive second synchronization information that needs to be referenced when transmitting an uplink signal
- the determining unit 1230 is configured to determine a transmission moment of the transmission signal according to the second synchronization information.
- the receiving unit 1210 is configured to receive signaling for whether offset compensation is required for the uplink timing advance; and the determining unit 1230 is configured to determine an uplink transmission moment according to a timing offset before and after the second synchronization change.
- the user equipment further comprises an adjusting unit 1240, the determining unit 1230 is configured to determine whether the change of the second synchronization exceeds a predetermined threshold; the adjusting unit 1240 is configured to exceed a predetermined threshold At the time, the timing of the second synchronization is adjusted according to the timing deviation that the second synchronization changes.
- the synchronization unit 1220 is further configured to establish an initial synchronization according to a pre-defined or base station configured primary synchronization signal and/or secondary synchronization signal PSS/SSS.
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Abstract
Description
Claims
Priority Applications (12)
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| PL13760981T PL2827632T3 (pl) | 2012-03-16 | 2013-03-18 | Sposób konfiguracji komórki i sposób, urządzenie użytkownika i stacja bazowa do synchronizacji |
| ES13760981T ES2848213T3 (es) | 2012-03-16 | 2013-03-18 | Método de configuración de celda y método, equipo de usuario, y estación base usados para la sincronización |
| EP13760981.4A EP2827632B1 (en) | 2012-03-16 | 2013-03-18 | Cell configuration method and method, user equipment, and base station for synchronization |
| BR112014022829A BR112014022829A8 (pt) | 2012-03-16 | 2013-03-18 | método de configuração de célula, método de sincronização, equipamento de usuário e estação base |
| EP20196919.3A EP3823370B1 (en) | 2012-03-16 | 2013-03-18 | Cell configuration method, synchronization method, user equipment, and base station |
| EP22177420.1A EP4117355A1 (en) | 2012-03-16 | 2013-03-18 | Cell configuration method, synchronization method, user equipment, and base station |
| US14/487,911 US9736803B2 (en) | 2012-03-16 | 2014-09-16 | Cell configuration method, synchronization method, user equipment, and base station |
| US15/656,846 US10244498B2 (en) | 2012-03-16 | 2017-07-21 | Cell configuration method, synchronization method, user equipment, and base station |
| US16/282,049 US10609666B2 (en) | 2012-03-16 | 2019-02-21 | Cell configuration method, synchronization method, user equipment, and base station |
| US16/428,464 US10492158B2 (en) | 2012-03-16 | 2019-05-31 | Cell configuration method, synchronization method, user equipment, and base station |
| US16/684,154 US11375466B2 (en) | 2012-03-16 | 2019-11-14 | Cell configuration method, synchronization method, user equipment, and base station |
| US17/832,333 US11825432B2 (en) | 2012-03-16 | 2022-06-03 | Cell configuration method, synchronization method, user equipment, and base station |
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| CN201210070828.5A CN103313250B (zh) | 2012-03-16 | 2012-03-16 | 小区配置方法和同步方法,用户设备和基站 |
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| EP (3) | EP4117355A1 (zh) |
| CN (1) | CN103313250B (zh) |
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-
2012
- 2012-03-16 CN CN201210070828.5A patent/CN103313250B/zh active Active
-
2013
- 2013-03-18 EP EP22177420.1A patent/EP4117355A1/en active Pending
- 2013-03-18 EP EP13760981.4A patent/EP2827632B1/en active Active
- 2013-03-18 PL PL13760981T patent/PL2827632T3/pl unknown
- 2013-03-18 BR BR112014022829A patent/BR112014022829A8/pt not_active Application Discontinuation
- 2013-03-18 WO PCT/CN2013/072804 patent/WO2013135210A1/zh not_active Ceased
- 2013-03-18 EP EP20196919.3A patent/EP3823370B1/en active Active
- 2013-03-18 ES ES13760981T patent/ES2848213T3/es active Active
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| WO2011119005A2 (en) * | 2010-03-26 | 2011-09-29 | Lg Electronics Inc. | Method and base station for receiving reference signal, and method and user equipment for receiving reference signal |
| WO2011162660A1 (en) * | 2010-06-21 | 2011-12-29 | Telefonaktiebolaget L M Ericsson (Publ) | Method and arrangement for signaling of parameters in a wireless network |
| CN102378243A (zh) * | 2010-08-12 | 2012-03-14 | 华为技术有限公司 | 重选偏移量获取及处理方法、基站及用户设备 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918334A (zh) * | 2014-03-14 | 2015-09-16 | 中兴通讯股份有限公司 | 一种调整业务传输的方法和装置 |
| EP3197087B1 (en) * | 2014-09-15 | 2022-03-09 | ZTE Corporation | Downlink pilot sending method, detecting method, device, base station and terminal |
| CN112368984A (zh) * | 2018-05-10 | 2021-02-12 | 株式会社Ntt都科摩 | 用户终端 |
| CN112368984B (zh) * | 2018-05-10 | 2024-02-06 | 株式会社Ntt都科摩 | 用户终端 |
Also Published As
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| ES2848213T3 (es) | 2021-08-05 |
| US9736803B2 (en) | 2017-08-15 |
| EP2827632B1 (en) | 2020-12-02 |
| EP2827632A1 (en) | 2015-01-21 |
| US20220369261A1 (en) | 2022-11-17 |
| US10492158B2 (en) | 2019-11-26 |
| EP3823370A1 (en) | 2021-05-19 |
| CN103313250A (zh) | 2013-09-18 |
| US10244498B2 (en) | 2019-03-26 |
| EP3823370B1 (en) | 2022-06-08 |
| PL2827632T3 (pl) | 2022-02-28 |
| US20200084740A1 (en) | 2020-03-12 |
| US20170325189A1 (en) | 2017-11-09 |
| US11375466B2 (en) | 2022-06-28 |
| US20150003442A1 (en) | 2015-01-01 |
| US10609666B2 (en) | 2020-03-31 |
| BR112014022829A8 (pt) | 2021-06-22 |
| BR112014022829A2 (pt) | 2017-06-20 |
| US11825432B2 (en) | 2023-11-21 |
| EP2827632A4 (en) | 2015-05-20 |
| US20190182787A1 (en) | 2019-06-13 |
| CN103313250B (zh) | 2016-09-28 |
| EP4117355A1 (en) | 2023-01-11 |
| US20190289564A1 (en) | 2019-09-19 |
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