WO2014086203A1 - 一种协同小区的探测参考信号资源配置方法及装置 - Google Patents
一种协同小区的探测参考信号资源配置方法及装置 Download PDFInfo
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- WO2014086203A1 WO2014086203A1 PCT/CN2013/085126 CN2013085126W WO2014086203A1 WO 2014086203 A1 WO2014086203 A1 WO 2014086203A1 CN 2013085126 W CN2013085126 W CN 2013085126W WO 2014086203 A1 WO2014086203 A1 WO 2014086203A1
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- srs
- cell
- user terminal
- resources
- time domain
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010586 diagram Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000013468 resource allocation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000010267 cellular communication Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- 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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- 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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
-
- 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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/008—Timing of allocation once only, on installation
Definitions
- the present invention relates to the field of mobile communication technologies, and in particular, to a method and a device for configuring a Sounding Reference Signal (SRS) resource of a coordinated cell.
- SRS Sounding Reference Signal
- the International Telecommunications Union puts very stringent requirements on the performance of next-generation mobile communication systems (ie, the International Mobile Telecommunications-Advancd ( ⁇ - ⁇ ) system), for example, maximum system transmission.
- the bandwidth reaches 100MHz, and the peak rate of uplink and downlink data transmission needs to reach 1G bps and 500M bps; and the system average spectral efficiency, especially the edge spectrum efficiency, is very high.
- the 3rd Generation Partnership Project In order to meet the requirements of the new IMT-Advanced system, the 3rd Generation Partnership Project (3GPP, The 3rd Generation Partnership Project) is in its next-generation mobile cellular communication system (ie, Long Term Evolution Advanced (LTE-A) system)
- the CoMP (Co-ordinated Multi-Point) transmission technology is proposed to improve the performance of the system.
- the CoMP transmission technology is a geographically separated plurality of transmission points, which cooperate to participate in data transmission of one terminal or jointly receive data transmitted by one terminal. Multiple transmission points participating in a collaboration generally refer to base stations of different cells.
- the Sounding Reference Signal is a user equipment (UE)
- the UE periodically transmits the SRS on the last symbol of the transmission subframe according to the parameters specified by the base station, such as the bandwidth, the frequency domain location, the sequence cyclic shift, the period, and the subframe offset.
- the eNB measures the channel state information of the UE uplink according to the received SRS, and performs frequency domain selective scheduling, closed loop power control, and the like according to the uplink channel quality.
- TDD Time Division Duplexing
- the cells participating in the cooperation need to obtain the channel from the terminal to the own cell. status information. Therefore, all coordinated cells need to correctly receive the SRS sent by the UE. Therefore, how to allocate SRS resources reasonably makes it very important to minimize SRS interference between cells.
- the embodiments of the present invention provide a method and a device for configuring a sounding reference signal resource of a coordinated cell, which are used to solve the problem that the SRS between the cells in the related art has serious interference.
- the embodiment of the invention provides a method for configuring a sounding reference signal SRS resource of a coordinated cell, which includes:
- all cells are divided into different cell groups, including:
- determining a time domain resource configuration order of the start of the SRS of each cell group including: collecting, according to the SRS subframe configuration, the number of SRS symbols in a predetermined reference time to obtain the number of SRS symbols N;
- each cell group is allocated a time domain resource starting from the SRS, and the time domain resource configuration order of the SRS starting of each cell group is determined.
- determining a SRS resource grouping policy of the cell according to the status information of the user terminal including:
- the status information of the user terminal includes X types
- configuring SRS resources for accessing user terminals in each cell includes:
- the time domain resource configuration order starting from the SRS corresponding to the cell to which the user terminal belongs, and the start of GroupAO> GroupAi > Group A2 > ... > GroupA(Xl)
- the frequency domain resource sequence allocates initial SRS resources to user terminals.
- configuring SRS resources for accessing user terminals in each cell includes:
- the GroupAi resource corresponding to the user terminal is configured according to the latest state information i of the user terminal. If the GroupAi has no idle resources, the SRS resource is configured for the user terminal according to the priority order of the frequency domain resources.
- the method further includes: after configuring an SRS resource for accessing a user terminal in each cell,
- the number of user terminals accessing each cell is counted multiple times, and the average number of user terminals accessing each cell is obtained;
- the time domain resource configuration order according to the SRS is The allocated SRS resources are reconfigured.
- An embodiment of the present invention further provides a sounding reference signal SRS resource configuration apparatus of a coordinated cell, including:
- a grouping unit which is configured to: divide all cells into different cell groups
- a start time domain order determining unit configured to: determine a time domain resource configuration order of SRS starting of each cell group;
- An SRS resource grouping policy determining unit configured to: according to status information of the user terminal, SRS resource grouping strategy for a given cell;
- the SRS resource configuration unit is configured to: configure SRS resources for accessing user terminals in each cell according to the time domain resource configuration order and the SRS resource grouping policy initiated by the SRS.
- the grouping unit is configured to divide all cells into different cell groups in the following manner:
- the initial time domain order determining unit is configured to determine a time domain resource configuration order of SRS starting of each cell group in the following manner:
- the number of SRS symbols is counted in a predetermined reference time to obtain the number N of SRS symbols;
- each cell group is allocated a time domain resource starting from the SRS, and the time domain resource configuration order of the SRS starting of each cell group is determined.
- the SRS resource grouping policy determining unit is configured to determine a SRS resource grouping policy of the cell according to the state information of the user terminal in the following manner:
- Is ⁇ , where ⁇ D ⁇ ke Z, 0 ⁇ k ⁇ Sl , Z is an integer ⁇ ;
- the status information of the user terminal includes X types
- the SRS resource configuration unit is configured to configure SRS resources for accessing user terminals in each cell in the following manner:
- the time domain resource configuration sequence starting from the SRS corresponding to the cell to which the user terminal belongs, and the start of GroupAO > GroupAl > Group A2 > ... > GroupA (Xl)
- the frequency domain resource sequence allocates initial SRS resources to user terminals.
- the SRS resource configuration unit is configured to configure SRS resources for accessing user terminals in each cell in the following manner: After obtaining the status information of the user terminal, or after the status information of the user terminal is changed, acquiring the latest status information i of the user terminal;
- the GroupAi resource corresponding to the user terminal is configured according to the latest state information i of the user terminal. If the GroupAi has no idle resources, the SRS resource is configured for the user terminal according to the priority order of the frequency domain resources.
- the device further includes:
- the SRS resource reconfiguration unit is configured to: perform multiple statistics on the number of user terminals accessing each cell within a set time, and determine the average number of user terminals accessing each cell; and the average number of user terminals If the number of the largest orthogonal user terminals supported by the system is smaller, and the cells of the SRS resources allocated by the user terminal cannot be orthogonal, the allocated SRS resources are reconfigured according to the time domain resource configuration order initiated by the SRS. .
- the method and the device in the embodiment of the present invention can reduce signaling interaction of each coordinated cell in the CoMP, and have regularity in SRS resource allocation, which can effectively suppress interference between cells and small cells, and improve spectrum efficiency of the system. , in particular, to improve the spectrum efficiency of users at the edge of the cell.
- FIG. 1 is a flowchart of a method for configuring a sounding reference signal resource of a coordinated cell according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of a grouping in a system networking in an embodiment of the present invention
- FIG. 3 is a schematic diagram of a SRS time domain resource configuration in a cell according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of an SRS start symbol configuration of each cell group in the embodiment of the present invention
- FIG. 5 is a schematic diagram of initial resource configuration of a coordinated cell UE SRS according to an embodiment of the present invention
- FIG. 6 is a schematic diagram of a coordinated cell according to a UE according to an embodiment of the present invention
- the state information is a schematic diagram of the SRS resources reconfigured by the UE;
- FIG. 7 is a schematic diagram of allocation before adaptive adjustment of a UESRS resource of a coordinated cell according to an embodiment of the present invention
- FIG. 8 is a schematic diagram of allocation after adaptive adjustment of a coordinated cell UE SRS resource according to an embodiment of the present invention
- FIG. 9 is a schematic structural diagram of an apparatus for configuring a sounding reference signal resource of a coordinated cell according to an embodiment of the present invention.
- a method for configuring a sounding reference signal resource of a coordinated cell includes the following steps:
- Step S101 All cells are divided into different cell groups.
- all cells in the system are divided into multiple groups of different cell groups; the allocation method may be any method, but in order to more effectively suppress inter-cell interference, the neighboring cells are preferentially not in the same cell.
- Group principles are grouped. For example, as shown in FIG. 2, in FIG. 2, cell 0 is cell group 1, cell 1, 3, and 5 are one cell group 2, and cells 2, 4, and 6 are one cell group 3, and each cell group has the same Method of allocation.
- Step S102 Determine a time domain resource configuration order of starting SRS of each cell group.
- the SRS start time domain resources are allocated to the respective groups in the order of the SRS symbols (for example, by 0 N-1 ), and the SRS time domain resource order of each cell group is determined.
- the SRS start time domain resource corresponding to cell group 1 is symbol 0
- the SRS start time domain resource corresponding to cell group 2 is symbol 1
- the time division order of each cell group is:
- the time division order of cell group 1 is [0, 1, 2, ..., N-1]
- the time division order of cell group 2 is [1, 2, ... ... , ⁇ -1 , 0]
- the time division order of cell group 3 is [2, ...,
- Step S103 Determine, according to status information of the user terminal, a SRS resource grouping policy of the cell.
- the frequency domain resources of the SRS symbol are divided into M segments, that is, the M is obtained by dividing the cell SRS bandwidth by the UESRS bandwidth.
- the SRS resource grouping policy of the cell is determined according to the state information of the user terminal. If the status information of the user terminal includes X types, the status information of each type of user terminal corresponds to a code tree subset GroupAi, that is, the code tree subset assigned to a certain status information is marked as GroupAi.
- Grou Ai ⁇ k
- GroupA0 ⁇ k
- GroupAl ⁇ k
- GroupA2 ⁇ k
- GroupA3 ⁇ k
- Step S104 Configure SRS resources for accessing user terminals in each cell according to the time domain resource configuration order and the SRS resource grouping policy initiated by the SRS.
- the time domain resource according to the SRS corresponding to the cell to which the user terminal belongs is generated.
- the appropriate resource is allocated according to the latest user terminal status information:
- the user terminal After the initial connection is established by the RRC, the user terminal obtains the status information of the user terminal, or obtains multiple types of reporting information, such as the A3 event and the path loss status, and finds that the status information of the user terminal is changed from some status information to another.
- the GroupAi resource corresponding to the user terminal is configured according to the determined status information i of the latest user terminal; if the GroupAi has no idle resources, the SRS is configured for the user terminal according to the priority order of the frequency domain resources. Resources. example
- the order of the SRS resources is frequency division, Comb division, code division, and time division.
- the priority order of the frequency domain resources mentioned is only an example; in the actual process, it needs to be determined according to the predefined state information.
- the cell 0 obtains the UE as an edge user by measurement, and the power is not limited; the cell 1 obtains the UE as a central user by measurement, and the power is limited; The UE is a central user, and the power is not limited.
- the three cells need to reconfigure the SRS resources for the UE according to the obtained UE status information according to the following principles: For edge users whose user power is not limited, according to GroupAO > GroupAi > GroupAi > Group A3 is configured with SRS resources in sequence; for central users with unrestricted user power, edge users with limited user power, according to GroupA2 > GroupAO > GroupAO > The order of the GroupAl is configured with the SRS resource; and for the central user in the case of the user power limitation, the UE of the cell 0 is allocated the location of the GroupAO of the SRS symbol 0, the UE of the cell 1 is allocated the location of the Group A3 of the SRS symbol 1, and the UE of the cell 2 Assigned at the GroupAl position of SRS symbol 2, the allocation is as shown in FIG. 6.
- the method of the embodiment of the present invention further includes the step S105:
- Step S105 performing multiple statistics on the number of user terminals accessing each cell within a set time, and determining the average number of user terminals accessing each cell; when the average number of user terminals is less than the maximum orthogonal supported by the system If the number of user terminals is not orthogonal to the cells of the SRS resources allocated by the user terminal, the allocated SRS resources are reconfigured according to the time domain resource configuration order initiated by the SRS.
- the number of users accessed is counted. If the number of users counted in the continuous multiple statistics does not exceed the maximum number of orthogonal users, and the user has been allocated. The resources cannot be orthogonal to each other, and the allocated resources are re-adjusted to resources completely orthogonal to the neighboring cells. The adjustment strategy is allocated according to the frequency division, Comb score, code division, and time division in the same group. Resources. If the number of users counted each time exceeds the maximum number of orthogonal users, or the resources allocated by the user can ensure orthogonality between cells, no SRS resource adjustment is performed.
- the timer duration is 200s
- the number of statistics in the timer duration is 4, and the maximum number of orthogonal users supported by the system is 32.
- the average number of users in cell 0 is 4
- the number of users in cell 1 is 7
- the number of users in cell 2 is 2, and the number of access users in 3 cells is average.
- adaptive adjustment is needed in each cell to re-adjust the resource allocation of the SRS.
- the adjustment strategy is based on the internal frequency of the same group. Resources are allocated in the order of points, Comb points, code points, and time divisions, as shown in Figure 8.
- the order of allocation of the frequency division, the Comb division, and the code division is a recommended allocation sequence.
- the order of the frequency division, the Comb division, and the code division can be arbitrarily configured.
- the embodiment of the present invention further provides an SRS resource configuration apparatus for a coordinated cell that implements the foregoing method, including: a grouping unit 91, configured to divide all cells into different cell groups;
- a start time domain order determining unit 92 configured to determine a time domain resource configuration order of SRS start of each cell group
- An SRS resource grouping policy determining unit 93 configured to determine a cell SRS resource grouping policy according to status information of the user terminal;
- the SRS resource configuration unit 94 is configured to configure SRS resources for accessing user terminals in each cell according to the time domain resource configuration order and the SRS resource grouping policy initiated by the SRS.
- the grouping unit 91 is configured to divide all cells into different cell groups in the following manner: All cells are divided into different cell groups according to the principle that neighboring cells are not in the same cell group.
- the start time domain order determining unit 92 is a time domain resource configuration order for determining the SRS start of each cell group in the following manner:
- the number of SRS symbols is counted in a predetermined reference time to obtain the number N of SRS symbols;
- each cell group is allocated a time domain resource starting from the SRS, and the time domain resource configuration order of the SRS starting of each cell group is determined.
- the SRS resource grouping policy determining unit 93 is configured to determine a SRS resource grouping policy of the cell according to the state information of the user terminal in the following manner:
- Is ⁇ , where ⁇ D ⁇ ke Z, 0 ⁇ k ⁇ Sl , Z is an integer ⁇ ;
- the status information of the user terminal includes: a user attribute and a field strength information; wherein the user attribute includes a center user or an edge user; the field strength information includes the user power limited or unrestricted; and the corresponding code is determined according to the state information of the user terminal.
- Tree subset The code tree subset corresponding to the edge user in the case where the user terminal power is not limited is marked as GmupAO and the code tree subset corresponding to the center user is marked as GroupAi; the code corresponding to the edge user in the case where the user terminal power is limited The tree subset is marked as The code tree subset corresponding to GroupA2 and the central user is labeled GroupA3.
- the SRS resource configuration unit 94 is configured to configure SRS resources for accessing user terminals in each cell in the following manner:
- the time domain resource configuration sequence starting from the SRS corresponding to the cell to which the user terminal belongs, and the start of GroupAO > GroupAl > Group A2 > ... > GroupA (Xl)
- the frequency domain resource sequence allocates initial SRS resources to user terminals.
- the SRS resource configuration unit 204 is configured to configure SRS resources for accessing user terminals in each cell in the following manner:
- the group Ai resource corresponding to the user terminal is configured. If the group Ai has no idle resources, the SRS resource is configured for the user terminal according to the priority order of the frequency domain resources.
- the device further includes:
- the SRS resource reconfiguration unit 95 is configured to perform multiple statistics on the number of user terminals accessing each cell within a set time, and determine the average number of user terminals accessing each cell; If the SRS resource cells that are allocated by the user terminal cannot be orthogonal, the allocated SRS resources are reconfigured according to the time domain resource configuration sequence initiated by the SRS.
- the situation of each cell and its neighboring cells is comprehensively considered, so that different SRS symbols are occupied in the time domain when the SRS resources are allocated between adjacent cells, and are allocated through SRS.
- the adaptive adjustment ensures that the SRS between adjacent cells is completely orthogonal when the number of users is small.
- the users are grouped according to user attributes and user field strength information, thereby avoiding interference between users SRS in the cell. Therefore, the accuracy of the SRS measurement is greatly improved.
- the signaling interaction of each coordinated cell in the CoMP can be reduced, and the SRS resource allocation has regularity, which can effectively suppress inter-cell interference;
- the spectral efficiency of the system especially the spectral efficiency of the cell edge users.
- the method and the device in the embodiment of the present invention can reduce signaling interaction of each coordinated cell in the CoMP, and have regularity in SRS resource allocation, which can effectively suppress interference between cells and small cells, and improve spectrum efficiency of the system. , in particular, to improve the spectrum efficiency of users at the edge of the cell.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US14/649,767 US9814039B2 (en) | 2012-12-07 | 2013-10-12 | Method and apparatus for configuring SRS resource for cooperating cells |
EP13861118.1A EP2916479B1 (en) | 2012-12-07 | 2013-10-12 | Method and apparatus for configuring srs resource for cooperating cells |
JP2015545647A JP6050898B2 (ja) | 2012-12-07 | 2013-10-12 | 協調セルのサウンディング参照信号リソース設定方法及び装置 |
HK16100620.0A HK1212830A1 (zh) | 2012-12-07 | 2016-01-20 | 種協同小區的探測參考信號資源配置方法及裝置 |
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CN201210521505.3 | 2012-12-07 | ||
CN201210521505.3A CN103856309B (zh) | 2012-12-07 | 2012-12-07 | 一种协同小区的探测参考信号资源配置方法及装置 |
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US (1) | US9814039B2 (zh) |
EP (1) | EP2916479B1 (zh) |
JP (1) | JP6050898B2 (zh) |
CN (1) | CN103856309B (zh) |
HK (1) | HK1212830A1 (zh) |
WO (1) | WO2014086203A1 (zh) |
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2012
- 2012-12-07 CN CN201210521505.3A patent/CN103856309B/zh not_active Expired - Fee Related
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2013
- 2013-10-12 WO PCT/CN2013/085126 patent/WO2014086203A1/zh active Application Filing
- 2013-10-12 EP EP13861118.1A patent/EP2916479B1/en not_active Not-in-force
- 2013-10-12 US US14/649,767 patent/US9814039B2/en not_active Expired - Fee Related
- 2013-10-12 JP JP2015545647A patent/JP6050898B2/ja not_active Expired - Fee Related
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2016
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CN101867938A (zh) * | 2009-04-20 | 2010-10-20 | 大唐移动通信设备有限公司 | 一种用于多点协同传输的上行参考信号的配置方法和装置 |
US20100322115A1 (en) * | 2009-06-23 | 2010-12-23 | Motorola, Inc. | Reference Signal Sounding for Uplink Pilot Time Slot in Wireless Communication System |
CN101714897A (zh) * | 2009-11-12 | 2010-05-26 | 普天信息技术研究院有限公司 | 探测参考信号的配置方法 |
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Also Published As
Publication number | Publication date |
---|---|
US9814039B2 (en) | 2017-11-07 |
EP2916479B1 (en) | 2016-11-23 |
US20150305027A1 (en) | 2015-10-22 |
JP2015536628A (ja) | 2015-12-21 |
CN103856309A (zh) | 2014-06-11 |
HK1212830A1 (zh) | 2016-06-17 |
EP2916479A1 (en) | 2015-09-09 |
CN103856309B (zh) | 2017-05-10 |
EP2916479A4 (en) | 2015-11-04 |
JP6050898B2 (ja) | 2016-12-21 |
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