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 PDF

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Publication number
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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WIPO (PCT)
Prior art keywords
cell
synchronization
user equipment
base station
system information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/072804
Other languages
English (en)
French (fr)
Inventor
孙静原
夏亮
周永行
任晓涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to PL13760981T priority Critical patent/PL2827632T3/pl
Priority to ES13760981T priority patent/ES2848213T3/es
Priority to EP13760981.4A priority patent/EP2827632B1/en
Priority to BR112014022829A priority patent/BR112014022829A8/pt
Priority to EP20196919.3A priority patent/EP3823370B1/en
Priority to EP22177420.1A priority patent/EP4117355A1/en
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2013135210A1 publication Critical patent/WO2013135210A1/zh
Priority to US14/487,911 priority patent/US9736803B2/en
Anticipated expiration legal-status Critical
Priority to US15/656,846 priority patent/US10244498B2/en
Priority to US16/282,049 priority patent/US10609666B2/en
Priority to US16/428,464 priority patent/US10492158B2/en
Priority to US16/684,154 priority patent/US11375466B2/en
Priority to US17/832,333 priority patent/US11825432B2/en
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • H04W56/0015Synchronization between nodes one node acting as a reference for the others
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0092Indication of how the channel is divided
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/04Traffic adaptive resource partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control 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

本发明实施例公开了一种小区配置方法和实现用户设备与基站之间同步的方法、用户设备和基站。所述小区配置方法包括:第一小区对应的第一基站确定第二小区的系统信息;第一基站将所述系统信息通知给第二小区对应的第二基站,使得所述第二基站根据所述系统信息发送和接收信号。通过根据本发明实施例提供的方案,可以根据用户设备分布和业务分布而动态或半静态地调整小区的系统信息,从而能够将网络的资源更好地提供给需要的用户设备,提高为用户设备服务的能力,同时降低了对网络规划的要求,使建立无线通信网络更加简单,并且增强了网络的调节能力。

Description

小区配置方法和同步方法, 用户设备和基站
本申请要求于 2012 年 3 月 16 日提交中国专利局、 申请号为 201210070828.5、 发明名称为"小区配置方法和同步方法, 用户设备和基站"的 中国专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域, 具体而言, 涉及一种小区配置方法和实现用户 设备与基站之间同步的方法、 用户设备和基站。
背景技术
现有的无线通信系统基本都釆用了蜂窝系统。 在蜂窝系统中, 整个 系统被划分成多个小区, 相同的时频资源可能在每一个小区都使用或在 相互间隔超过一定距离的多个小区都使用。 在将整个网络分成多个小区 的时候, 需要进行网络规划。 网络规划中, 网络中的各基站的位置、 基 站分别对应几个小区, 各小区的小区标识 (ID ) 以及各小区使用的小区 其他多个系统信息 (包括载频和带宽等) 都是需要规划好的。
在网络规划完成后, 各个基站都按照已经规划好的小区的系统信息 来发送信号。 各用户设备在接入网络的时候需要搜索小区并接入到小区 中。 然后从广播信道中读取小区的其他相关系统信息, 然后各用户设备 根据小区系统信息如小区 ID/载波载频 /系统带宽 /天线数量等与基站建立 通信连接。
然而在无线通信系统中, 在网络规划完成后, 各小区 ID和对应的系 统信息是固定不变的。 无论实际环境下用户设备的分布和业务需求的分 布有什么变化, 都只能用这种网络规划的小区系统来为用户设备提供服 务, 而不能因为用户设备的分布或业务需求的分布发生变化而调整网络 中的小区系统信息来调整小区来适应变化。 例如, 当一个或多个新的小区加入到网络中时, 为了给该新的小区 分配小区 ID需要对整个网络重新进行网络规划。 如果该新的小区为临时 小区或者小区位置经常变动, 那么针对每一次变动重新进行网络规划, 因此造成网络维护的复杂性提高。 而如果允许新的小区由其自身随机选 择的小区 ID, 那么很可能会引起较大的小区间干扰或不适应网络内业务 分布的情况。
又例如, 在包含宏小区和微小区的网络中, 如果网络的主要需求是 获得更多的控制信道容量,则可以让宏小区和微小区使用不同的小区 ID; 如果网络的主要需求是获得更好的小区间协作, 则可以让宏小区和微小 区使用相同的小区 ID。 当网络中主要需求发生变化时, 由于小区 ID是在 网络规划时已经规划好且不能改变的, 因此现有网络并不能满足上述需 求的变化。
另外, 用户设备在与小区建立通信连接时, 需要与基站之间建立下 行的初始同步和同步跟踪, 并在这个同步的基础上接收基站发送数据, ^口物理下行共享信道(Physical Downlink Shared Channel, PDSCH ) 的数 据。 而在上行, 则需要基站指示用户设备一定的定时提前 ( Timing Advance , TA ) , 用户设备根据从基站接收的 ΤΑ的累积、 一个预定义的 偏移值和下行同步来确定上行传输时刻。
在动态节点选择 ( Dynamic Point Selection, DPS ) 传输方式下, 用 户设备需要和多个节点建立同步。 但是, 用户设备并不知道要根据哪些 参考信号进行同步,根据哪个同步来接收 PDSCH以及根据哪个同步来确 定上行传输时刻。
发明内容
本发明实施例中提供了一种小区配置方法和实现用户设备与基站之间同 步的方法、 用户设备和基站。
一方面, 本发明实施例提供了一种小区配置方法, 包括: 第一小区对应的 第一基站确定第二小区的系统信息;第一基站将所述系统信息通知给第二小区 对应的第二基站, 使得所述第二基站根据所述系统信息发送和接收信号。
另一方面, 本发明实施例提供了一种小区配置方法, 包括: 第一小区中的 用户设备从第一小区对应的第一基站接收第二小区的系统信息;所述用户设备 根据所述系统信息与第二小区对应的第二基站进行通信。
另一方面, 本发明实施例提供了一种基站, 与第一小区对应, 包括: 确定 单元, 用于确定第二小区的系统信息; 以及发送单元, 用于将所述系统信息通 知给第二小区对应的第二基站,使得所述第二基站根据所述系统信息发送和接 收信号。
另一方面, 本发明实施例提供了一种用户设备, 包括: 接收单元, 用于从 第一小区对应的第一基站接收第二小区的系统信息; 通信单元, 用于根据所述 系统信息与第二小区对应的第二基站进行通信。
通过根据本发明实施例提供的方案,可以根据用户设备分布和业务分布而 动态或半静态地调整小区的系统信息,从而能够将网络的资源更好地提供给需 要的用户设备, 提高为用户设备服务的能力, 同时降低了对网络规划的要求, 使建立无线通信网络更加简单, 并且增强了网络的调节能力。
另一方面, 本发明实施例提供了一种实现用户设备与基站之间同步的方 法, 包括: 确定至少一个参考信号 RS资源组或端口组的配置信息; 将所述配 置信息发送给用户设备, 使得用户设备根据所述所述至少一个 RS资源组或端 口组的配置信息建立同步。
另一方面, 本发明实施例提供了一种实现用户设备与基站之间同步的方 法, 包括: 接收至少一个参考信号 RS资源组或端口组的配置信息; 根据所述 配置信息基于每一个所述 RS资源组或端口组分别建立同步。 另一方面, 本发明实施例提供了一种基站, 包括: 确定单元, 用于确定至 少一个参考信号 RS资源组或端口组的配置信息; 以及发送单元, 用于将所述 配置信息发送给用户设备, 使得用户设备根据所述所述至少一个 RS资源组或 端口组的配置信息建立同步。
另一方面, 本发明实施例提供了一种用户设备, 包括: 接收单元, 用于接 收至少一个参考信号 RS资源组或端口组的配置信息; 以及同步单元, 用于根 据所述配置信息基于每一个所述 RS资源组或端口组分别建立同步。
通过根据本发明实施例提供的方案, 实现用户设备与基站之间的同步, 用 户设备能够正确地接收 PDSCH信道上的数据, 并且可以正确地确定上行子帧 发送定时。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施 例中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是 本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的 前提下, 还可以根据这些附图获得其他的附图。
图 1示出了根据本发明实施例提出的一种小区配置方法的流程图; 图 2示出了根据本发明的另一个实施例的小区配置方法的流程图; 图 3 示意性示出了本实施例中第二基站和用户设备分别接收到第一基站 发送的系统信息之后进行通信的流程图;
图 4示出了根据本发明实施例的同步方法的流程图;
图 5示出了根据本发明另一个实施例的同步方法的流程图;
图 6示出了根据本发明另一个实施例的同步方法的流程图;
图 7示出了根据本发明另一个实施例的同步方法的流程图;
图 8示出了还提出了根据本发明另一个实施例的同步方法的流程图; 图 9示出了根据本发明实施例的基站的示意性结构图;
图 10示出了根据本发明实施例的用户设备的示意性结构图;
图 11示出了根据本发明实施例的基站的示意性结构图;
图 12示出了根据本发明实施例的基站的示意性结构图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整的描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动的前提下所获得的所有其他实施例, 都属于本发明保护的范围。
图 1示出了根据本发明实施例提出的一种小区配置方法的流程图。 可见, 该方法包括:
步骤 110: 第一小区对应的第一基站确定第二小区的系统信息。 在本发明实施例的一种实现方式中,所述第二小区的系统信息包括第二小 区的小区标识( Cell Identity, Cell ID ) 、 载波载频、 载波系统带宽、 循环前缀 ( cyclic prefix, CP )长度、天线数量、物理混合自动重传请求指示信道( Physical hybrid- ARQ indicator channel, PHICH )配置信息、参考信号 ( Reference Signal, RS )发送功率、 时分双工 ( Time Division Duplexing, TDD )子帧配比、 几乎 空子帧(Almost Blank Subframe, ABS )配置、 最大发射功率 /功率调整、 子帧 静默、子带静默中的一个或者多个。其中,所述小区标识可以是物理小区标识。 所述系统信息可以是第二小区的初始化系统信息, 也可以是更新的系统信息。 例如,初始化系统信息是用于对所述第二小区首次进行配置的系统信息。 更新 的系统信息是用于在第二小区系统信息首次配置之后,对其进行再次配置的系 统信息。 即, 之前设定了第二小区的系统信息, 更新的系统信息是指用于对该 系统信息进行更新的系统信息。 其中, 确定系统信息可以是确定系统信息的一 项或多项, 如只确定小区 ID, 或同时确定小区 ID和载波载频。 可选的, 该系 统信息还可以包括第二小区的激活状态信息。所述激活状态信息用于指示所述 第二小区的系统信息是否激活、 何时激活、 激活持续时间中的一个或者多个。
在本实施例的实现方式中, 可以是第一基站确定第二小区所有的系统信 息,也可以是在网络规划时规划第二小区的部分或全部的系统信息, 而第一基 站确定第二小区的部分或全部系统信息。当第一基站确定的第二小区的部分系 统信息与网络规划的对应系统信息不同时,第二小区对应的第二基站将使用第 一基站确定的系统信息。
第一小区可以在小区覆盖上包含第二小区,也即第二小区可以是第一小区 的覆盖范围下的子小区, 也可能的是第一小区和第二小区并不交迭, 或者也可 能第一小区和第二小区部分交迭。例如, 当第一小区在小区覆盖上包含第二小 区时,第一小区对应的第一基站可以根据第一小区统计的第二小区覆盖区域内 的用户分布信息或者业务分布信息、 以及根据网络侧已经使用的小区 ID、 载 频等来确定第二小区的系统信息。或者在第一小区对应的第一基站并不知道第 二小区覆盖区域内用户分布信息或者业务分布信息的情况下,第一小区对应的 第一基站可以利用网络侧 (例如基站控制器、 核心网设备或其他网络侧设备) 统计的第二小区的用户分布信息或者业务分布信息、以及根据网络侧已经使用 的小区 ID、 载频等来确定第二小区的系统信息。 在本实施例中优选的, 在第 一基站确定第二小区的系统信息时,可以考虑第二小区在使用该系统信息的情 况下在网络中产生的干扰, 即可以选择合适的系统信息,使得所述第二小区在 使用所述系统信息时在整个网络或者部分网络中产生的干扰最小,或者产生的 干扰低于一个预设的门限值。 当所述系统信息包括小区 ID时,根据网络需求, 所述小区 ID可以与相邻小区的小区 ID相同,也可以不同,所述确定的第二小 区的小区 ID可以与第一小区的小区 ID相同,也可以不同。 当所述系统信息为 其他系统信息时, 如系统带宽等, 所述确定的第二小区的系统信息可以与第一 小区的对应系统信息相同,也可以不同,还可以确定第二小区使用的系统信息 与第一小区的系统信息正交, 如使用的系统带宽之间正交。
这里还需要说明的是, 步骤 110可以在预定的条件被满足时触发执行。举 例而言 ,
当满足以下条件 1-3中的一个或者多个时,第一小区对应的第一基站确定 第二小区的小区 ID;
条件 1 : 第一基站对应的多个小区之间因为扰码而产生的干扰高于第一预 定门限值;
条件 2: 所述第二小区为一个新加入网络且尚未进行初始化配置的小区; 条件 3: 第一基站覆盖范围内的控制信道容量需求超过当前能够提供的控 制信道容量。
所述第一基站内可以预先存储或者从其他网络设备获取每一个已在网络 中使用的小区 ID关联的低干扰小区 ID集合, 所述低干扰小区 ID集合中的每 个可选小区 ID与该集合关联的小区 ID在同时使用时干扰都低于所述第一预定 门限值。 当满足条件 1或者条件 2触发步骤 110时, 所述第一基站首先确定所 述第二小区周围相邻小区的小区 ID所关联的低干扰小区 ID集合,然后从多个 低干扰小区 ID集合的交集或者并集中选择一个小区 ID作为所述第二小区的小 区 ID。
当满足条件 3而触发步骤 110时,所述第一基站可以将所述选择一个与所 述第二小区的邻小区不同的小区 ID作为所述第二小区的小区 ID。
当满足以下条件 4或条件 5时,第一小区对应的第一基站确定第二小区的 载波载频和 /或系统带宽;
条件 4: 第二小区对一个或多个相邻小区的干扰高于第二预定门限值; 条件 5: 第二小区覆盖范围内的业务密度小于第二预定门限值。
当满足条件 4或条件 5时, 所述第一基站可以使用遍历的方式,从所述第 二小区可用的载波载频中找到至少一个载波载频,使得所述第二小区使用该载 波载频和 /或系统带宽后与周围小区之间的干扰水平低于所述第二预定门限 值。 例如, 第二小区的载波可以从第一载波调整为第二载波, 或系统带宽从 10MHz调整为 5MHz; 或系统带宽从 10MHz调整为前 5MHz的同时载频也一 起调整。
当满足以下条件 6或 7时,第一小区对应的第一基站确定第二小区的天线 数量;
条件 6: 当第二小区对应的基站的某些天线发生故障时;
条件 7: 当第二小区所在区域内 CSI-RS资源数量不够时。
当满足条件 6或 7时,所述第一基站例如将所述第二小区由 4天线服务改 为 2天线服务, 即将天线数量确定为 2。
当满足以下条件 8时, 第一小区对应的第一基站确定第二小区的 RS功率 和 /或最大发射功率。
条件 8: 第二小区与相邻的一个或多个小区之间的干扰水平超过预定的第 三门限值。
当满足条件 8时,所述第一基站将提高或降低第二小区的 RS功率和 /或最 大发射功率, 直到达到第三门限值的要求。
当满足以下条件 9时,第一小区对应的第一基站确定第二小区的上下行子 帧配比。
条件 9: 在上行或下行子帧上, 第二小区与相邻的一个或多个小区之间的 干扰水平超过预定的第四门限值;
当满足条件 9时, 将第二小区的一个或者多个上行子帧改为下行子帧, 和 /或将第二小区的一个或多个下行子帧改为上行子帧, 直到达到第四门限值的 要求。
当满足以下条件 10时, 第一小区对应的第一基站确定第二小区的静默子 帧。
条件 10: 在某些子帧上, 第二小区与相邻的一个或多个小区之间的干扰 水平超过预定的第五门限值;
当满足条件 10时, 所述第一基站将第二小区的一个或者多个子帧静默, 直到达到第五门限值的要求。
当满足以下条件 11时, 第一小区对应的第一基站确定第二小区的静默子 带。
条件 11 : 在某些子带上, 第二小区与相邻的一个或多个小区之间的干扰 水平超过预定的第六门限值。
当满足条件 11时, 所述第一基站将第二小区的一个或者多个子带静默, 直到达到第六门限值的要求。
应当指出的是, 所述第一至第六门限值可以相同也可以不同; 触发条件还 可以包括与条件 1至条件 11相反的条件, 使所述第一基站可以进行与上述例 子相反的调整或设置。
步骤 120: 第一基站将所述系统信息通知给第二小区对应的第二基站, 使 得所述第二基站根据所述系统信息发送和接收信号。
在此, 第一基站在通知系统信息时, 可以通过站点间或小区间的任何接口 例如 X2接口或私有接口等来进行。 第二基站接收该系统信息后, 可以根据该 系统信息来确定第二小区的相关参数, 并根据所述相关参数发送和接收信号。 例如, 根据系统信息来产生第二小区的下行信号和 /或接收针对第二小区的上 行信号。
当所述系统信息包括物理小区 ID 时, 所述相关参数包括扰码序列、 RS 的位置、 同步信号、 物理控制格式指示信道(Physical control format indicator channel, PCFICH ) 的位置、 或其他与所述物理小区 ID相关的参数。 具体而 言, 所述根据该系统信息来配置第二小区的相关参数包括以下步骤 a-d中的一 个或者多个:
步骤 a: 根据接收到的物理小区 ID来确定扰码序列, 以便于所述第二小 区对应的第二基站利用所述扰码来进行加扰和 /或解扰。
步骤 b: 根据接收到的物理小区 ID确定 RS的位置。 具体可以确定 CRS ( Cell-spcific Reference Signals , 小区专用参考信号) 和 /或用户设备专用 ( UE-specific )的 RS等 RS的参数 vshlft, 从而确定其 RE的位置。 例如, 当物 理小区 ID从 10更新为 11时, 由于 vshlft=Cell ID mod 6, 因此 vshlft从 4更新为 5, 从而可以达到调整小区间的干扰强度和干扰概率的效果。
步骤 c: 根据接收到的物理小区 ID确定同步信号。 具体可以使用接收到 的物理小区 ID来生成主同步信号的序列和 /或辅同步信号的序列。
步骤 d: 根据接收到的物理小区 ID确定 PCFICH的位置。 所述 PCFICH 的位置可以是 PCFICH对应的 RE在整个带宽中的位置。 当物理小区 ID发生 变化时, 由于 PCFICH的 RE位置发生变化, 从而可以达到调整小区间的干扰 强度和干扰概率的效果。
当所述系统信息包括 CP长度时, 所述相关参数包括 CP长度:
步骤 e: 根据接收到的 CP长度信息, 确定使用普通 CP长度的 CP还是扩 展 CP长度的 CP
当所述系统信息包括系统带宽时, 所述相关参数包括子带大小: 步骤 f: 根据接收到的系统带宽确定子带大小, 如系统带宽从 5MHz变为 10MHz, 从而对应的子带大小从 6RB更新为 8RB;
当所述系统信息包括天线数时, 所述相关参数包括码本大小:
步骤 g: 根据接收到的天线数确定选择的码本和传输方式。
在本实施例的一种实现方式中,第一基站可以预先限定第二小区系统信息 的生效时间, 或者通知第二基站所述系统信息的生效时间。 第二基站在接收到 第二小区的系统信息后, 按照生效时间来开始使用对应的第二小区的系统信 息。 所述生效时间可以是一个绝对时间, 例如所述生效时间可以用于指示在接 收到所述系统信息之后立即生效,或者所述激活状态信息可以包含一个激活帧 号或者激活子帧号, 来指示在该帧或子帧上激活。 当然, 所述生效时间也可以 是一个相对时间,如在第二基站接收到对应系统信息 100个无线帧后的第一个 子帧生效,或者可以指示在接收到所述系统信息之后的给定时间(例如 500ms ) 之后生效。
本领域技术人员根据上述实施例可知,通过第一小区对应的第一基站确定 第二小区的系统信息并将其发送给第二小区对应的第二基站,可以实现第一基 站对第二小区的管理。 第一基站可以激活第二小区, 并通知用户设备第二小区 的激活以及第二小区的系统信息, 第一基站同样可以关闭第二小区, 同时通知 用户设备第二小区关闭的相关系统信息,还可以通知用户设备切换回到第一小 区或切换到另一个如第三小区的相关系统信息, 等等。这些是本领域技术人员 在本发明实施例的教导下可以想到的, 这里不进行详细说明。
在本发明的实施例中, 术语 "小区" 包括物理小区或载波。 物理小区指物 理设备对应的小区,而载波对应的小区指至少一套物理设备在至少一个载波上 工作, 每一个载波上每一套工作的物理设备可以对应一个小区。
在步骤 120之后,所述第一基站还可以将所述系统信息或者包含所述生效 时间的系统信息发送给第一小区中的用户设备,使得用户设备可以根据所属系 统信息更新存储的第二小区的系统信息或确定相关参数,并使用更新的系统信 息或相关参数接入到第二小区中或调整与第二小区的连接链路,例如调整连接 链路使用的相关参数,根据相关的系统信息来接收第二小区的信号或向第二小 区发送信号, 实现用户设备和第二基站之间的通信。 也可能的是, 第一基站将 所述系统信息发送给第二小区或第三小区,第二小区或第三小区将所述系统信 息发送给第一小区中的用户设备,使得所述用户设备能够根据所述系统信息与 第二小区对应的第二基站进行通信。 对此方面在下面的实施例中还将进行描 述。
还可以是,第一基站将第二小区的系统信息和所述系统信息的生效时间通 知给第二小区或第一、 第二小区之外的其他小区, 然后第二小区或第一、 第二 小区之外的其他小区通知用户设备所述系统信息或者包含所述生效时间的系 统信息。本发明的实施例中, 第一小区和第二小区可以对应相同的基站或不同 的基站。 当第一小区和第二小区对应相同的基站时, 即所述第一基站和第二基 站为同一个基站时,可以通过基站内部接口或包括私有接口在内的其他任何接 口来通知第二小区系统信息。 当第一小区和第二小区对应不同的基站时, 第一 基站可以通过基站间接口或 X2或包括私有接口在内的其他任何接口来通知第 二小区对应的第二基站所述系统信息。
在本发明的实施例中, 第一基站还可以同时确定多个小区的系统信息, 并 将确定的所述系统信息通知给所述多个小区的每一个小区对应的基站,从而每 一个小区对应的基站根据系统信息来产生对应小区的下行信号和 /或接收针对 对应小区的上行信号。此时第一基站可以确定多个小区的系统信息相同,如确 定多个小区 ID相同, 或多个小区的系统信息不同, 如确定多个小区 ID不同, 或者多个小区的系统带宽相同但对应的频段正交。
本实施例中, 由于第二小区的系统信息是通过第一基站来确定的, 因此可 以根据用户分布和业务分布的需求而动态或半静态地调整小区的系统信息,从 而能够将网络的资源更好地提供给需要的用户,提高为用户服务的能力, 同时 降低了对网络规划的要求,使建立无线通信网络更加简单, 并且增强了网络的 调节能力。
图 2示出了根据本发明的另一个实施例的小区配置方法的流程图。本实施 例中的步骤可以在图 1所对应的实施例的基础上执行。 本实施例的方法包括: 步骤 210: 第一小区中的用户设备从第一小区对应的第一基站接收第二 d、 区的系统信息。 所述系统信息可以为初始化系统信息或者更新的系统信息, 所述系统信 息还包括激活状态信息, 所述激活状态信息用于指示所述第二小区是否激活、 何时激活、激活持续时间中的一个或者多个。 所述系统信息还可以是特定于所 述用户设备的系统信息。在图 1所对应的实施例中关于小区和系统信息的描述 都可以适用到本实施例中, 因此这里不再赘述。 在本实施例中, 所述系统信息 可以通过广播消息通知给用户设备, 或者通过特定于用户设备信令, 如 RRC 信令等高层信令, 通知给用户设备。
步骤 220: 用户设备根据所述系统信息与第二小区对应的第二基站进行通 信。
当用户设备接收到第一小区对应的第一基站发送的第二小区的系统信息 后,用户设备可以根据所述系统信息确定与第二小区进行通信需要使用的相关 参数, 所述相关参数与上述实施例中的相同,如当所述系统信息包括物理小区
ID时, 所述相关参数包括扰码序列、 RS的位置、 同步信号、 PCFICH的位置、 或其他与所述物理小区 ID相关的参数。 确定相关参数的方式也与上述实施例 相同。 由于事先第二基站已经根据所述系统信息对相关参数进行了调整, 并根 据所述系统信息来发送和接收信号,从而第二基站和用户设备都根据所述系统 信息对相关参数进行了调整,因此用户设备可以根据相关的系统信息来接收第 二小区的信号或发送信号, 从而可以在用户设备和第二基站之间进行通信。
根据一个实施方式, 该方法还包括接收所述第二小区系统信息更新的时 间, 才艮据系统信息更新的时间来更新对应的所述第二小区的系统信息。
图 3 示意性示出了本实施例中第二基站和用户设备分别接收到第一基站 发送的系统信息之后进行通信的流程图。首先第一小区中的第一基站将第二小 区的系统信息分别发送给第二基站和用户设备。在此, 可以是系统信息在第二 基站和用户设备当中同时生效, 也可以是系统信息在第二基站当中首先生效, 然后在用户设备当中生效等等, 这并不影响本发明的实质。在第二基站和用户 设备都根据所述系统信息来确定相关参数之后,可以在第二基站和用户设备之 间建立连接链路或者更新连接链路。
可见在本发明实施例中, 第二小区的系统信息是通过第一基站来确定的, 因此可以根据用户分布的需求和业务分布的需求而动态或半静态地调整小区 的系统信息,从而能够将网络的资源更好地提供给需要的用户,提高为用户服 务的能力, 同时降低了对网络规划的要求, 使建立无线通信网络更加简单, 并 且增强了网络的自动调节能力。
根据本发明的另一个实施例,还提出了一种实现用户设备与基站之间同步 的方法。 需要指出的是, 在执行下面结合图 4和图 5所描述的同步方法之前, 作为本发明的一部分, 用户设备可以根据预定义的或基站配置的主同步信号 (primary synchronization signal , PS S)/辅同步信号 (secondary synchronization signal, SSS)来建立初始同步, 而后根据相应的多个 CSI-RS资源和该初始同步 来建立同步。 其中在所述 PSS/SSS和所述多个 CSI-RS资源之间有映射关系。
图 4示出了根据本发明实施例的同步方法的流程图。可见, 该方法包括以 下步骤:
步骤 410: 确定至少一个参考信号 ( Reference Signal, RS ) 资源组或端口 组的配置信息。 RS 可以包括信道状态信息-参考信号 ( Channel-State Information-Reference Signal , CSI-RS ) 和小区特定参考信号 (Cell-specific Reference Signals, CRS ) 。 资源组可以包括一个或多个资源, 端口组可以包 括一个或多个端口。
步骤 420: 将所述配置信息发送给用户设备, 使得用户设备根据所述所述 至少一个 RS资源组或端口组的配置信息建立同步。
在本实施例中, RS资源组或端口组的配置包括对应 RS资源组或端口组 内的每一个 RS资源或端口的导频图案、 带宽、频域位置、周期与子帧偏移等。 一种实施方式是通知用户设备所有用于同步的 RS 资源组或端口组中每一个 RS资源或端口的配置参数, 配置参数可以包括导频图案、 带宽、 频域位置、 周期与子帧偏移等参数。 一种实施方式是通知用户设备将所有现有的 RS资源 组或端口组中每一个 RS资源或端口都按照当前通知的参数来建立同步。 一种 实施方式可以为通知用户设备用于同步的 RS资源组或端口组, 同时通知每一 个 RS资源组或端口组用于同步时的一定配置信息, 此时用户设备将通知的配 置信息覆盖对应 RS资源或端口的对应已有配置信息来获得用于同步的 RS资 源或端口, 并根据这些 RS资源或端口建立同步。 举例说明, 使用已经通知给 用户设备的第 0、 1、 2号 CSI-RS资源建立同步, 其中每一个 CSI-RS资源作 为一个资源组, 当对应的关于带宽的配置信息为用于同步的 CSI-RS资源组的 带宽为 6个资源块( Resource Block,RB )且对应的频域位置为频带中心时, 用 户设备只根据频带中心的 6个 RB的 3个 CSI-RS资源分别进行同步。 另一种 实施方式可以为通知用户设备用于同步的 3个 CSI-RS资源组分别包括第 0、 1、 2号 CSI-RS资源, 其对应的周期为 5ms, 但当对应的用于同步的配置信息为 周期为 20ms时,用户设备只使用 20ms的周期在对应的 3个 CSI-RS资源上分 别进行同步。 当用于同步的为 RS端口时, RS端口为 RS资源的一个端口或多 个端口的集合, 举例来说, 可以使用某一个 4端口 CSI-RS资源的第一个端口 或前两个端口来进行同步。
另一种实施方式中, 用于同步的 RS配置也可以复用测量集合(用于测量 信道状态信息的对应 RS的集合)或反馈集合(用于确定反馈信息的对应 RS 的集合) 内的 RS 配置。 也就是说, 测量集合或反馈集合也就是用于同步的 RS集合, 在测量集合或反馈集合中可能已经包括 RS配置, 在步骤 410中可 以直接使用测量集合或反馈集合中的这种配置来确定需要进行同步的 RS资源 组或端口组的配置信息。用户设备在接收到该测量集合或反馈集合的配置信息 之后, 基于所述 CSI-RS、 CRS资源或端口配置分别建立同步。 举例说明, 测 量集合包括第 0、 1、 2号 CSI-RS资源, 每一个 CSI-RS资源都对应 4端口、 整个带宽、 长度为 20ms的周期并且子帧偏移等于 5 , 第 0、 1、 2号 CSI-RS 资源分别对应导频图案 0、 1、 2, 用户设备直接使用对应的 3个 CSI-RS资源 分别建立同步。还可以在测量集合或反馈集合的基础上, 进一步通知集合中的 部分 CSI-RS资源或 CSI-RS端口是需要进行同步的 CSI-RS资源组或 CSI-RS 端口组,其中每一个资源组包括一个资源,每一个端口组包括至少一个端口(其 中每一个端口组中端口的数量可以是预定义的,如一个端口或资源对应的前两 个端口)。更进一步的,还可以通知测量集合或反馈集合中部分或全部 CSI-RS 资源或 CSI-RS端口用于同步时的配置信息, 那么用户设备在一定的 RS资源 或端口进行同步时釆用当前通知的用于同步时的对应配置信息,而不是对应已 有的 RS资源或端口的对应配置信息。 如测量集合同时用于同步, 测量集合包 括第 0、 1、 2号 CSI-RS资源, 每一个 CSI-RS资源都对应 4端口、 整个带宽、 长度为 20ms的周期和子帧偏移等于 5, 第 0、 1、 2号 CSI-RS资源分别对应导 频图案 0、 1、 2, 但用于同步时使用长度为 40ms的周期, 那么用户设备釆用 长度为 40ms的周期的第 0、 1、 2号 CSI-RS资源来分别建立同步。
在此, 用户设备可以建立一个或者多个同步。 此外, 同步的建立还可以是 用户设备根据一定的触发条件来实现的,例如触发条件可以是需要根据同步的 CSI-RS/CRS资源或端口进行某些测量或反馈, 此时需要预先同步, 或可以是 需要同步的 CSI-RS/CRS资源或端口对应的参考信号接收功率或者参考信号接 收质量超过一定阔值, 当然也可以是其他能够想到的触发条件。 本发明实施例 中, 同步可以用同步跟踪、 定时等代替, 上述方法仍然适用。
在本实施例中, 由于将所述配置信息发送给用户设备, 可以使得用户设备 根据所述每一个所述资源组或端口组的配置信息建立同步,从而解决了用户设 备并不知道要根据哪些参考信号进行同步的问题。
根据一个实施例, 在上面描述的建立用户设备与基站的同步之后,还可以 进一步执行如下步骤来实现用户设备接收 PDSCH数据。 图 5示出了根据本发 明实施例的同步方法的流程图。
从图 5可见, 步骤 410和步骤 420与图 4所示的步骤完全相同, 这里不再 重复。
步骤 430: 确定用户设备接收物理下行共享信道 PDSCH需要参考的第一 同步信息。 在此, 可以^ ^站自身来确定第一同步信息, 也可以是基站通过其 他方式获得第一同步信息。 在此, 确定第一同步信息可以通过如下方式进行: 首先确定发射物理下行共享信道使用的发射节点,然后确定该发射节点发射的 RS资源组或 RS端口组对应的同步作为第一同步信息。
步骤 440: 将所述第一同步信息发送给用户设备, 使得用户设备根据所述 第一同步信息确定所需使用的同步来从所述 PDSCH接收数据。由于在步骤 410 中, 用户设备可能和基站建立了多个同步, 因此基站确定用户设备需要根据哪 个同步在 PDSCH上接收数据, 也即确定第一同步信息。 在该步骤 440中, 基 站可以使用多种方式来将第一同步信息发送给用户设备。 例如,在动态节点选 择 ( Dynamic Point Selection, DPS )模式中, 可以通过下行控制信息( Downlink Control Information, DCI )通知来传输所述第一同步信息; 在单节点服务模 式下, 可以通过无线资源控制 (Radio Resource Control, RRC )信令或者 DCI 通知来传输所述第一同步信息; 在联合传输( Joint Transmission, JT )模式中, 可以通过 RRC信令或者 DCI通知来传输所述第一同步信息, 例如可以通知用 户设备使用最近的节点对应的 CSI-RS来进行同步。 要指出的是, 上面的举例 并非穷举,本领域技术人员容易想到可以使用其他合适的方式来将第一同步信 息发送给用户设备。通过该第一同步信息, 用户设备能够得知需要根据哪个同 步来接收 PDSCH数据。 通知第一同步信息时, 可以根据用于同步的 RS资源 组或端口组的编号来通知, 如按照基站通知用于同步的 RS资源时的顺序将用 于同步的 RS资源组或端口组进行编号, 当通知第一同步信息时, 只通知对应 RS 资源组或端口组对应的编号即可。 还可以用位图映射(bitmap ) 的方式来 通知, 此时 bitmap中的每一个 bit对应一个用于同步的 RS资源组或端口组, 将第一同步对应的 bit置 1 , 其他 bit置 0, 从而使用该 bitmap可以有效通知第 一同步信息。
通过上述的方案, 用户设备可以根据基站的指示来选择所需同步来接收 PDSCH数据, 从而正确地接收 PDSCH上的数据。
根据一个实施例, 在上面结合图 4 描述的建立用户设备与基站的同步之 后,还可以进一步执行如下步骤来实现用户设备用户设备确定发送上行信息的 传输时刻。 图 6示出了根据本发明实施例的同步方法的流程图。在图 6所示的 方法中, 说明了如何根据下行同步来确定上行传输时刻。 从图 6 可见, 步骤 410和步骤 420与图 4所示的步骤完全相同, 这里不再重复。
步骤 450:确定用户设备发送上行信号时需要参考的第二同步信息。在此, 可以 ^^站自身来确定第二同步信息,也可以是基站通过其他方式获得第二同 步信息。
步骤 460: 将所述第二同步信息发送给用户设备, 使得用户设备能够根据 所述第二同步信息来确定发送上行信号的传输时刻。
由于用户设备已经与基站建立了多个同步, 因此在步骤 450中,基站确定 用户设备在上行方向上需要参考的第二同步信息,例如基站确定用户设备的第 二同步是某一个用户设备已经建立的同步(确定的方法可以是一直使用同一个 同步作为第二同步,或确定接收用户设备上行信息的节点对应的同步作为第二 同步), 用户设备则需要根据该同步的定时确定作为上行传输时刻调整的参考 值。 例如, 用户设备在得知第二同步是某一个用户设备已经建立的同步时, 可 以根据该同步和上行 TA来确定发送上行信息的上行传输时刻。 此外, 用户设 备可以确定第二同步变化前后的定时偏差,根据该定时偏差和第二同步以及上 行 TA等参数一起去确定发送上行数据的上行传输时刻。例如,根据基站通知, 第二同步从同步 A变化为同步 B, 同步 A、 B之间的同步定时偏差为 Aoffset, 那么用户设备需要调整 TA为 TA'=TA+Aoffset,再用对应的 TA'和基站通知的 第二同步来确定上行传输时刻。通知第二同步信息的方法可以和通知第一同步 信息的方法相同,如通知对应同步的编号或使用位图映射来通知需要使用的第 二同步。
作为一种实施方式, 还可以包括通知用户设备是否需要进行定时偏差补 偿, 用户设备根据该通知确定需要或不需要进行定时偏差补偿。 当需要进行补 偿时,用户设备先确定定时补偿偏差,再根据定时偏差补偿来调整 TA为 ΤΑ' , 然后根据 TA'和基站通知的第二同步来确定上行传输时刻。
当然也可能的是,预定义用户设备根据一定触发条件来进行定时补偿, 如 用户设备来确定第二同步的变化是否超过预先确定的阔值,并且当第二同步发 生改变超过预先设定的门限时,用户设备根据第二同步所变化的定时偏差来调 整 ΤΑ, 例如自动调整 ΤΑ值为 TA, =TA+Aoffset, 其中 Aoffset是第二同步改 变前后的定时偏差。 当同时有触发条件和基站的通知时, 只有同时满足触发条 件并基站通知需要进行定时偏差补偿时, 用户设备才进行定时偏差补偿, 并根 据补偿后的 TA'来去定上行传输时刻。
由此, 用户设备可以根据该第二同步确定的上行传输时刻来发送上行信 号。
图 5和图 6所示的方法可以分别单独执行, 也可以结合执行。 相应地, 图 7示出了根据本发明的另一实施例的同步方法的流程图。 可见, 该方法包括: 步骤 710: 确定至少一个参考信号 (Reference Signal, RS ) 资源组或端口 组的配置信息。 RS可以包括 CSI-RS和 CRS。
步骤 720: 将所述配置信息发送给用户设备, 使得用户设备根据所述配置 信息基于每一个所述资源组或端口组建立与基站的同步。
步骤 730: 确定用户设备接收物理下行共享信道 PDSCH需要参考的第一 同步信息。 步骤 740: 将所述第一同步信息发送给用户设备, 使得用户设备根据所述 第一同步信息确定所需使用的同步来从所述 PDSCH信道接收数据。
步骤 750: 确定用户设备发送上行数据时需要参考的第二同步信息。
步骤 760: 将第二同步信息发送给用户设备, 使得用户设备能够根据所述 第二同步信息来确定发送上行信号的传输时刻。
需要指出的是, 上面的描述并未限定步骤执行的顺序。 例如, 可以先执行 步骤 750和 760, 之后执行步骤 730和 740, 并未改变本发明实施例的实质, 在本发明实施例的公开范围中。
可见, 通过上述方法, 确定了用户设备的上行同步和下行同步, 使得用户 设备和基站之间可以进行上行和下行方向的通信。关于上述方法各步骤的具体 内容可以参见前面结合图 4至图 6的描述, 这里不再重复。
相应地,根据本发明的实施例,还提出了一种实现用户设备与基站之间同 步的方法。 图 8示出了所述方法的流程图。 可见, 该方法包括: 步骤 810: 接 收需要进行同步的至少一个参考信号 RS 资源组或端口组的配置信息; 步骤 820: 根据所述配置信息基于每一个所述 RS 资源组或端口组分别建立与基站 的同步。
根据一个实施形式,所述方法还包括:接收 PDSCH对应的第一同步信息; 根据所述第一同步信息确定所需使用的同步来从所述 PDSCH信道接收数据。
根据一个实施形式, 所述方法还包括: 接收发送上行信号时需要参考的第 二同步信息; 根据所述第二同步信息来确定发送上行信号的传输时刻。
根据一个实施形式, 所述方法还包括: 接收是否需要对定时进行偏差补偿 的信令;根据所述第二同步变化前后的定时偏差来对发生变化的第二同步进行 补偿。
根据一个实施形式, 所述方法还包括: 确定第二同步的变化是否超过预先 确定的阔值; 当超过预先确定的阔值时,根据第二同步所变化的定时偏差来调 整第二同步的定时。
根据一个实施形式, 所述方法还包括: 根据预定义的或基站配置的主同步 信号和 /或辅同步信号 PSS/SSS来建立初始同步。
关于上述方法的具体内容可以参见前面结合图 4至图 7从基站侧描述的实 施例, 这里不再赘述。
根据本发明的实施例, 还提出了一种基站, 其与第一小区对应。 图 9示出 了根据本发明实施例的基站的示意性结构图。 可见, 该基站 900包括: 确定单 元 910, 用于确定第二小区的系统信息; 以及发送单元 920, 用于将所述系统 信息通知给第二小区对应的第二基站,使得所述第二基站根据所述系统信息发 送和接收信号。
根据一个实施形式, 所述确定单元 910具体用于: 动态或半静态地更新所 述第二小区的系统信息; 或者当预定的条件被满足时,触发所述第一基站确定 所述第二小区的系统信息。
根据一个实施形式,所述发送单元 920用于将所述系统信息发送给第一小 区中的用户设备,使得所述用户设备能够根据所述系统信息与第二小区对应的 第二基站进行通信;或者所述发送单元 920用于将所述系统信息发送给第二小 区或第三小区,第二小区或第三小区将所述系统信息发送给第一小区中的用户 设备,使得所述用户设备能够根据所述系统信息与第二小区对应的第二基站进 行通信。
根据一个实施形式,所述发送单元 920还通知用户设备所述第二小区系统 信息生效的时间,以使所述用户设备根据系统信息生效的时间来更新对应的所 述第二小区的系统信息。
根据本发明的实施例, 还提出了一种用户设备。 图 10示出了根据本发明 实施例的用户设备的示意性结构图。 该用户设备 1000, 包括: 接收单元 1010 , 用于从第一小区对应的第一基站接收第二小区的系统信息; 通信单元 1020, 用于根据所述系统信息与第二小区对应的第二基站进行通信。这里需要说明的 是, 通信单元 1020也可以包括通信单元 1010, 附图所示并非限制它们为独立 的单元。
根据一个实施形式, 所述用户设备还包括更新单元 1030, 所述接收单元 1010接收所述第二小区系统信息生效的时间, 以及所述更新单元 1030用于根 据系统信息生效的时间来更新对应的所述第二小区的系统信息。
根据本发明的实施例, 还提出了一种基站。 图 11示出了根据本发明实施 例的基站的示意性结构图。 该基站 1100包括: 确定单元 1110 , 用于确定至少 一个参考信号 RS资源组或端口组的配置信息; 以及发送单元 1120, 用于将所 述配置信息发送给用户设备, 使得用户设备根据所述所述至少一个 RS资源组 或端口组的配置信息建立同步。
根据一个实施形式,所述确定单元 1110用于确定用户设备接收物理下行 共享信道 PDSCH需要参考的第一同步信息; 以及所述发送单元 1120用于将 第一同步信息发送给用户设备,使得用户设备根据所述第一同步信息确定所需 使用的同步来从所述 PDSCH接收数据。
根据一个实施形式, 所述确定单元 1110用于确定用户设备发送上行信号 时需要参考的第二同步信息; 所述发送单元 1120用于将所述第二同步信息发 送给用户设备,使得用户设备能够根据所述第二同步信息来确定发送上行信号 的传输时刻。
根据一个实施形式, 所述基站还包括: 通知单元 1130 , 用于通知用户设 备是否需要对上行定时提前进行偏差补偿,使得用户设备能够根据所述第二同 步变化前后的定时偏差来确定上行传输时刻。
才艮据一个实施形式, 所述通知单元 1130用于通知用户设备主同步信号和 / 或辅同步信号 PSS/SSS , 以使用户设备根据所述主同步信号和 /或辅同步信号 建立初始同步。 根据本发明的实施例, 还提出了一种用户设备。 图 12示出了根据本发明 实施例的基站的示意性结构图。可见, 该用户设备 1200包括:接收单元 1210, 用于接收至少一个参考信号 RS 资源组或端口组的配置信息; 以及同步单元 1220, 用于根据所述配置信息基于每一个所述 RS资源组或端口组分别建立同 步。
根据一个实施形式, 所述用户设备还包括确定单元 1230, 所述接收单元 1210用于接收 PDSCH对应的第一同步信息; 以及所述确定单元 1230用于根 据所述第一同步信息确定所需使用的同步来从所述 PDSCH接收数据。
根据一个实施形式, 所述接收单元 1210用于接收发送上行信号时需要参 考的第二同步信息; 以及所述确定单元 1230用于根据所述第二同步信息来确 定发送信号的传输时刻。
根据一个实施形式, 所述接收单元 1210用于接收发送上行信号时需要参 考的第二同步信息; 以及所述确定单元 1230用于根据所述第二同步信息来确 定发送信号的传输时刻。
根据一个实施形式, 所述接收单元 1210用于接收是否需要对上行定时提 前进行偏差补偿的信令; 以及所述确定单元 1230用于根据所述第二同步变化 前后的定时偏差来确定上行传输时刻。
根据一个实施形式, 所述用户设备还包括调整单元 1240, 所述确定单元 1230用于确定第二同步的变化是否超过预先确定的阔值; 所述调整单元 1240 用于当超过预先确定的阔值时 ,根据第二同步所变化的定时偏差来调整第二同 步的定时。
根据一个实施形式, 所述同步单元 1220还用于根据预定义的或基站配置 的主同步信号和 /或辅同步信号 PSS/SSS来建立初始同步。
关于上述装置实施例的具体细节, 可以参见前面方法实施例的相关部分, 这里不再赘述。 本领域技术人员应该理解, 本发明实施例中装置模块的划分为功能划分, 实际具体结构可以为上述功能模块的拆分或合并。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。
权利要求的内容记载的方案也是本发明实施例的保护范围。
本领域普通技术人员可以理解上述实施例方法中的全部或部分处理是可 以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可读存 储介质中。
以上所述仅为本发明的较佳实施例而已, 并非用于限定本发明的保护范 围。 凡在本发明的精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均 应包含在本发明的保护范围之内。

Claims

权 利 要 求
1.一种小区配置方法, 其特征在于, 包括:
第一' 区对应的第一基站确定第二小区的系统信息;
第一基站将所述系统信息通知给第二小区对应的第二基站, 使得所 述第二基站根据所述系统信息发送和接收信号。
2. 根据权利要求 1所述的方法, 其特征在于, 所述系统信息包括小 区标识、 载频、 系统带宽、 循环前缀长度、 天线数目、 物理混合自动重 传请求指示信道配置信息、 最大发射功率、 子帧静默、 子带静默中的一 项或者多项。
3. 根据权利要求 2所述的方法, 其特征在于, 所述第一' 区对应的 第一基站确定第二小区的系统信息包括:
所述第一基站动态或半静态地更新所述第二小区的系统信息; 或者 当预定的条件被满足时, 触发所述第一基站确定所述第二小区的系 统信息。
4. 根据权利要求 3所述的方法, 其特征在于, 所述当预定的条件被 满足时, 触发所述第一基站确定所述第二小区的系统信息包括:
当满足以下条件中的一个或者多个时, 所述第一, _1、区对应的第一基 站确定第二小区的小区标识:
第一基站对应的多个小区之间因为扰码而产生的干扰高于第一预定 门限值;
所述第二小区为一个新加入网络且尚未进行初始化配置的小区; 第一基站覆盖范围内的控制信道容量需求超过当前能够提供的控制 信道容量。
5. 根据权利要求 1至 4中任意一项所述的方法, 其特征在于, 所述 系统信息为初始化系统信息或者更新的系统信息。
6. 根据权利要求 1至 4中任意一项所述的方法, 其特征在于, 所述 系统信息还包括激活状态信息, 所述激活状态信息用于指示所述第二小 区是否激活、 何时激活、 激活持续时间中的一个或者多个。
7. 根据权利要求 1至 4中任意一项所述的方法, 其特征在于, 还包 括:
所述第一基站将所述系统信息发送给第一小区中的用户设备, 使得 所述用户设备能够根据所述系统信息与第二小区对应的第二基站进行通 信; 或者
第一基站将所述系统信息发送给第二小区或第三小区, 第二小区或 第三小区将所述系统信息发送给第一小区中的用户设备, 使得所述用户 设备能够根据所述系统信息与第二小区对应的第二基站进行通信。
8. 根据权利要求 2所述的方法, 其特征在于, 所述第一基站预先限 定所述第二小区的系统信息生效的时间, 或者通知所述第二基站所述系 统信息生效的时间, 以使所述第二小区对应的第二基站根据系统信息生 效的时间来更新对应的所述第二小区的系统信息。
9. 根据权利要求 8所述的方法, 其特征在于, 还包括通知用户设备 所述第二小区系统信息生效的时间, 以使所述用户设备根据系统信息生 效的时间来更新对应的所述第二小区的系统信息。
10. 一种小区配置方法, 其特征在于, 包括:
第一小区中的用户设备从第一小区对应的第一基站接收第二小区的 系统信息;
所述用户设备根据所述系统信息与第二小区对应的第二基站进行通 信。
11. 根据权利要求 10所述的方法, 其特征在于, 所述系统信息为初 始化系统信息或者更新的系统信息。
12. 根据权利要求 10所述的方法, 其特征在于, 所述系统信息还包 括激活状态信息, 所述激活状态信息用于指示所述第二小区是否激活、 何时激活、 激活持续时间中的一个或者多个。
13. 根据权利要求 10至 12中的任意一项所述的方法, 其特征在于, 还包括接收所述第二小区系统信息生效的时间, 根据系统信息生效的时 间来更新对应的所述第二小区的系统信息。
14. 根据权利要求 10所述的方法, 其特征在于, 所述系统信息是特 定于所述用户设备的系统信息。
15. 一种实现用户设备与基站之间同步的方法, 包括:
确定至少一个参考信号 RS资源组或端口组的配置信息;
将所述配置信息发送给用户设备, 使得用户设备根据所述所述至少 一个 R S资源组或端口组的配置信息建立同步。
16. 根据权利要求 15所述的方法, 还包括:
确定用户设备接收物理下行共享信道 PDSCH 需要参考的第一同步 信息; 以及
将第一同步信息发送给用户设备, 使得用户设备根据所述第一同步 信息确定所需使用的同步来从所述 PDSCH接收数据。
17. 根据权利要求 15或 16所述的方法, 还包括:
确定用户设备发送上行信号时需要参考的第二同步信息;
将所述第二同步信息发送给用户设备, 使得用户设备能够根据所述 第二同步信息来确定发送上行信号的传输时刻。
18. 根据权利要求 16所述的方法, 还包括:
通知用户设备是否需要对上行定时提前进行偏差补偿, 使得用户设 备能够根据所述第二同步变化前后的定时偏差来确定上行传输时刻。
19. 根据权利要求 15所述的方法, 还包括: 通知用户设备主同步信 号和 /或辅同步信号 PSS/SSS , 以使用户设备根据所述主同步信号和 /或辅 同步信号建立初始同步。
20. 一种实现用户设备与基站之间同步的方法, 包括:
接收至少一个参考信号 RS资源组或端口组的配置信息;
根据所述配置信息基于每一个所述 RS 资源组或端口组分别建立同 步。
21. 根据权利要求 20所述的方法, 还包括: 接收 PDSCH对应的第一同步信息;
根据所述第一同步信息确定所需使用的同步来从所述 PDSCH 接收 数据。
22. 根据权利要求 20或 21所述的方法, 还包括:
接收发送上行信号时需要参考的第二同步信息;
根据所述第二同步信息来确定发送信号的传输时刻。
23. 根据权利要求 22所述的方法, 还包括:
接收是否需要对上行定时提前进行偏差补偿的信令;
根据所述第二同步变化前后的定时偏差来确定上行传输时刻。
24. 根据权利要求 22所述的方法, 还包括:
确定第二同步的变化是否超过预先确定的阔值;
当超过预先确定的阔值时, 根据第二同步所变化的定时偏差来调整 第二同步的定时。
25. 根据权利要求 20所述的方法, 还包括: 根据预定义的或基站配 置的主同步信号和 /或辅同步信号 PSS/SSS来建立初始同步。
26.—种基站, 与第一小区对应, 其特征在于, 包括:
确定单元, 用于确定第二小区的系统信息; 以及
发送单元, 用于将所述系统信息通知给第二小区对应的第二基站, 使得所述第二基站根据所述系统信息发送和接收信号。
27. 根据权利要求 26所述的基站, 其特征在于, 所述确定单元具体 用于:
动态或半静态地更新所述第二小区的系统信息; 或者
当预定的条件被满足时, 触发所述第一基站确定所述第二小区的系 统信息。
28. 根据权利要求 26所述的基站, 其特征在于:
所述发送单元用于将所述系统信息发送给第一小区中的用户设备, 使得所述用户设备能够根据所述系统信息与第二小区对应的第二基站进 行通信; 或者
所述发送单元用于将所述系统信息发送给第二小区或第三小区, 第 二小区或第三小区将所述系统信息发送给第一小区中的用户设备, 使得 所述用户设备能够根据所述系统信息与第二小区对应的第二基站进行通 信。
29. 根据权利要求 26所述的基站, 其特征在于, 所述发送单元还通 知用户设备所述第二小区系统信息生效的时间, 以使所述用户设备根据 系统信息生效的时间来更新对应的所述第二小区的系统信息。
30. 一种用户设备, 其特征在于, 包括:
接收单元, 用于从第一小区对应的第一基站接收第二小区的系统信 息;
通信单元, 用于根据所述系统信息与第二小区对应的第二基站进行 通信。
31. 根据权利要求 30所述的用户设备, 其特征在于, 还包括更新单 元,
所述接收单元接收所述第二小区系统信息生效的时间, 以及 所述更新单元用于根据系统信息生效的时间来更新对应的所述第二 小区的系统信息。
32. 一种基站, 其特征在于, 包括:
确定单元,用于确定至少一个参考信号 RS资源组或端口组的配置信 息; 以及
发送单元, 用于将所述配置信息发送给用户设备, 使得用户设备根 据所述所述至少一个 RS资源组或端口组的配置信息建立同步。
33. 根据权利要求 32所述的基站, 其特征在于,
所述确定单元用于确定用户设备接收物理下行共享信道 PDSCH 需 要参考的第一同步信息; 以及
所述发送单元用于将第一同步信息发送给用户设备, 使得用户设备 根据所述第一同步信息确定所需使用的同步来从所述 PDSCH接收数据。
34. 根据权利要求 32或 33所述的基站, 其特征在于,
所述确定单元用于确定用户设备发送上行信号时需要参考的第二同 步信息;
所述发送单元用于将所述第二同步信息发送给用户设备, 使得用户 设备能够根据所述第二同步信息来确定发送上行信号的传输时刻。
35. 根据权利要求 33所述的基站, 其特征在于, 还包括:
通知单元, 用于通知用户设备是否需要对上行定时提前进行偏差补 偿, 使得用户设备能够根据所述第二同步变化前后的定时偏差来确定上 行传输时刻。
36. 根据权利要求 32所述的基站, 其特征在于, 还包括:
通知单元,用于通知用户设备主同步信号和 /或辅同步信号 PSS/SSS , 以使用户设备根据所述主同步信号和 /或辅同步信号建立初始同步。
37. 一种用户设备, 其特征在于, 包括:
接收单元,用于接收至少一个参考信号 RS资源组或端口组的配置信 息; 以及
同步单元,用于根据所述配置信息基于每一个所述 RS资源组或端口 组分别建立同步。
38. 根据权利要求 37所述的用户设备, 其特征在于, 还包括确定单 元:
所述接收单元用于接收 PD S C Η对应的第一同步信息; 以及
所述确定单元用于根据所述第一同步信息确定所需使用的同步来从 所述 PDSCH接收数据。
39. 根据权利要求 37所述的用户设备, 其特征在于, 还包括确定单 元:
所述接收单元用于接收发送上行信号时需要参考的第二同步信息; 以及
所述确定单元用于根据所述第二同步信息来确定发送信号的传输时 刻。
40. 根据权利要求 38所述的用户设备, 其特征在于,
所述接收单元用于接收发送上行信号时需要参考的第二同步信息; 以及
所述确定单元用于根据所述第二同步信息来确定发送信号的传输时 刻。
41 . 根据权利要求 39或 40所述的用户设备, 其特征在于,
所述接收单元用于接收是否需要对上行定时提前进行偏差补偿的信 令; 以及
所述确定单元用于根据所述第二同步变化前后的定时偏差来确定上 行传输时刻。
42. 根据权利要求 39或 40所述的用户设备, 其特征在于, 还包括调 整单元,
所述确定单元用于确定第二同步的变化是否超过预先确定的阔值; 所述调整单元用于当超过预先确定的阔值时, 根据第二同步所变化 的定时偏差来调整第二同步的定时。
43. 根据权利要求 37所述的用户设备, 其特征在于, 所述同步单元 还用于根据预定义的或基站配置的主同步信号和 /或辅同步信号 PSS/SSS 来建立初始同步。
PCT/CN2013/072804 2012-03-16 2013-03-18 小区配置方法和同步方法,用户设备和基站 Ceased WO2013135210A1 (zh)

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