WO2011137754A1 - 一种信号的传输方法、装置和系统 - Google Patents

一种信号的传输方法、装置和系统 Download PDF

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Publication number
WO2011137754A1
WO2011137754A1 PCT/CN2011/073734 CN2011073734W WO2011137754A1 WO 2011137754 A1 WO2011137754 A1 WO 2011137754A1 CN 2011073734 W CN2011073734 W CN 2011073734W WO 2011137754 A1 WO2011137754 A1 WO 2011137754A1
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WIPO (PCT)
Prior art keywords
transmitted
signal
cell
multiplexing
local cell
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Ceased
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PCT/CN2011/073734
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English (en)
French (fr)
Inventor
孙立新
万蕾
薛丽霞
冯心睿
余政
马莎
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP11777175.8A priority Critical patent/EP2568717B1/en
Publication of WO2011137754A1 publication Critical patent/WO2011137754A1/zh
Priority to US13/671,283 priority patent/US9363706B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13098—Mobile subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13109—Initializing, personal profile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13292—Time division multiplexing, TDM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery

Definitions

  • Co eNodeB, Home eNodeB, Re lay eNodeB, RRH, etc. acces s po int which can enhance hot spot coverage, indoor blind spot coverage, macro base station cell edge coverage, and improve cell average throughput and cell edge within the coverage of the macro base station Throughput, uplink/downlink spectrum utilization of the cell, etc.
  • the low power base station (or the user equipment served by the low power base station) and the macro base station (or the user equipment served by the macro base station) may be subjected to (complete or partial) spectrum multiplexing. Since the low-power base station (or the user equipment served by the low-power base station) uses the same carrier resource as the macro base station (or the user equipment served by the macro base station), the low-power base station (or the user equipment served by the low-power base station) and the macro base station (or user equipment served by the macro base station) may generate co-channel (or co-channel) interference with each other.
  • Interference can affect the reliability of detection of low power base stations (or user equipment served by low power base stations) and macro base stations (or user equipment served by macro base stations) (including control channels and data channels).
  • frequency domain or time domain avoidance methods are mainly used to reduce or eliminate interference between cells due to frequency reuse.
  • the inventors have found that in the prior art, when the frequency domain multiplexing method is used, the inter-cell interference is large when the frequency domain avoiding method is used, and the system complexity is high when the time domain avoiding method is used.
  • Embodiments of the present invention provide a signal transmission method, apparatus, and system for reducing inter-cell interference and reducing system complexity.
  • a selection module configured to select a multiplexing mode of the signal to be transmitted according to the interference intensity received by the cell, and/or the interference intensity received by the neighboring cell;
  • the notification module is configured to notify the receiving end of the multiplexing mode of the to-be-transmitted signal of the local cell
  • the transmitting module is configured to transmit the to-be-transmitted signal of the local cell according to the multiplexing manner of the to-be-transmitted signal of the local cell.
  • the acquiring module is configured to obtain a multiplexing manner of the to-be-transmitted signal of the local cell that is transmitted by the transmitting end, and the receiving module receives the to-be-transmitted signal of the local cell according to the multiplexing manner of the to-be-transmitted signal of the local cell.
  • a method, device and system for transmitting signals according to embodiments of the present invention adaptively select a multiplexing mode according to interference strength, thereby reducing inter-cell interference, improving channel detection reliability, reducing system complexity, and saving cost. .
  • BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.
  • FIG. 1 is a schematic diagram of a signal transmission method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a signal configuration resource region in which a cell and a neighboring cell negotiate to transmit a C picture multiplexing mode
  • FIG. 3 is a schematic diagram of another resource region configured by a cell in a C picture multiplexing mode by negotiating with a neighboring cell;
  • 4 is a schematic diagram of codeword resources available for signal configuration of two macro cells and their coverage areas for negotiating for CDM multiplexing mode transmission;
  • FIG. 5 is a schematic diagram of a macro base station Macro eNB1 and a Macro eNB2 transmitting signals to be transmitted by the UE1 in accordance with a CDM multiplexing manner;
  • FIG. 6 is a schematic diagram of another transmission method of a signal according to an embodiment of the present invention.
  • Figure ⁇ is a schematic diagram of a signal transmission device according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of another transmission device of a signal according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a signal transmission method according to an embodiment of the present invention.
  • This embodiment includes: Step 101: According to the interference strength received by the local cell, and/or the interference received by the neighboring cell The interference strength is used to select a multiplexing mode of the signal to be transmitted in the cell.
  • Step 104 notify the receiving end of the multiplexing mode of the to-be-transmitted signal of the local cell.
  • Step 105 The cell is transmitted according to the multiplexing mode of the to-be-transmitted signal of the local cell. Transmission signal.
  • the executor of the embodiment of the present invention is a transmitting end.
  • the sending end may be a base station, or a macro base station, or a Re yy node, or a Pi co base station, or a home base station, or a user equipment UE.
  • the transmitting end first selects a multiplexing mode of the to-be-transmitted signal of the local cell according to the interference strength received by the current cell and/or the interference strength received by the neighboring cell. In this way, when the interference strength of the local cell or the neighboring cell is strong, the multiplexing mode with strong anti-interference ability is selected, and when the interference intensity of the cell or the neighboring cell is low, the anti-interference ability is weak. The way to reuse. After the multiplexing mode is selected for the signal to be transmitted in the cell, the transmitting end needs to notify the receiving end of the selected multiplexing mode, so that the receiving end can receive the signal to be transmitted in the cell by using the correct multiplexing mode. Finally, the transmitting end transmits the to-be-transmitted signal of the cell to the receiving end according to the selected multiplexing mode.
  • the interference strength of the local cell in the embodiment of the present invention may be that the transmitting end or the receiving end in the cell obtains the interference strength on the physical resource of the local cell based on the pilot measurement, and/or the physical resource of the local cell reported by the receiving end.
  • the physical resource or physical resource of the local cell in the embodiment of the present invention may be a time domain resource, or a frequency domain resource, or a combination of a time domain resource and a frequency domain resource; the physical resource of the cell may be a single The physical resources occupied by the transmission signals on the downlink, and/or the physical resources occupied by the transmission signals on a single uplink, and/or the physical resources occupied by the transmission signals on multiple downlinks, and/or Is the physical resource occupied by the transmission signals on multiple uplinks.
  • the cell determines the neighboring cell according to the neighboring cell signal measurement, and/or the user equipment reporting information, and/or the network setting information; the neighboring cell may be a single cell, or may be a set of multiple cells;
  • the interference strength has a similar definition of the interference strength received by the above-mentioned cell, and will not be described here.
  • the cell may transmit or interact with the neighboring cell through the X2 interface, or the airborne wireless interface, or interfere with the interference strength or interference strength identification signal received by the local cell and the neighboring cell. Interest.
  • the signal to be transmitted in the cell in the embodiment of the present invention refers to: a signal waiting to be transmitted within the coverage of the cell; the signal waiting to be transmitted may be a transmission signal on a single downlink, and/or a single uplink. Transmission signals on the road, and/or transmission signals on multiple downlinks, and/or transmission signals on multiple uplinks.
  • the multiplexing manner of the to-be-transmitted signal of the local cell may include: if the interference strength received by the cell, and/or The interference strength of the neighboring cell is greater than or equal to the first threshold.
  • the cell to be transmitted in the cell selects a code division multiplexing C picture multiplexing mode. Otherwise, the cell to be transmitted in the cell selects the second multiplexing mode.
  • the second multiplexing mode is orthogonal frequency division multiplexing
  • the foregoing first threshold may be based on the interference strength received by the local cell, and/or the interference strength received by the neighboring cell, and/or the transmission performance of the transmitted signal of the local cell, and/or the service type of the signal to be transmitted in the local cell. Need to determine.
  • the interference strength received by the cell, and/or the interference strength received by the neighboring cell is greater than or equal to the first threshold, the interference strength is considered to be large, so that the C-picture multiplexing method with strong anti-interference capability is selected. If the value is smaller than the first threshold, the interference strength is considered to be small, so that the second multiplexing mode with weak anti-interference ability can be selected.
  • the transmitting end a If the receiving end UEa of the transmitting end a service adopts the multiplexing mode of the SC-F MN in the uplink PUSCH transmission, if the transmitting end a detects that the interference strength of the uplink PUSCH transmission of the UEa is greater than or equal to the first threshold, The transmitting end a configures the UEa to transmit the PUSCH in the C picture multiplexing manner; if the strong interference signal received by the UEA previously using the SC-FDMA multiplexing mode is transmitted in the C picture multiplexing mode, the transmitting end a takes precedence over the above The physical resources of the strong interference signal are configured to transmit the PUSCH by using the C picture multiplexing mode.
  • Step 1 02 Configure a resource area for the signal transmitted by the C picture multiplexing mode, or negotiate a resource allocation area for the signal transmitted by the C picture multiplexing mode with the neighboring cell.
  • the sender can be based on one of the following Or a plurality of combinations to allocate a resource region for a signal transmitted by the C picture multiplexing mode: according to the interference distribution received by the cell, and/or the transmission performance distribution of the current cell, and/or the load status of the cell is a C picture multiplexing mode
  • the transmitted signal configuration resource region; the interference distribution according to the current cell and the neighboring cell, and/or the transmission performance distribution of the local cell and the neighboring cell, and/or the load status of the local cell and the neighboring cell, and the neighboring cell Configuring a CDM resource region for the signal transmitted by the C picture multiplexing mode; according to the PUCCH resource allocation information of the neighboring cell, the signal transmitted by the C multiplex mode on the overlapping resource of the PUSCH resource of the local cell and the PUCCH
  • the overlapping resource of the PUSCH resource of the local cell and the PUCCH resource of the neighboring cell refers to a resource overlapping part of the PUSCH configuration resource of the local cell and the PUCCH configuration resource of the neighboring cell.
  • the above resource area may be determined by C drawing resource configuration information.
  • the CDM resource configuration information includes one or any combination of the following: a size of a configured or negotiated configured physical resource, and a location of a physical resource.
  • the size of the physical resource may include one or any combination of the following: physical resource number of blocks, number of subcarriers.
  • the location of the physical resource may include one or any combination of the following: the location of the subcarrier, the location of the physical resource block, the location of the subband, the subframe location of the physical resource transmission, the period of physical resource configuration, and the frequency hopping pattern of the physical resource.
  • FIG. 2 is a schematic diagram of a resource allocation resource region negotiated between the cell (cell 1) and the neighboring cell (cell 2) for transmission in the C picture multiplexing mode.
  • the local cell based on the interference distribution received by the local cell and the neighboring cell, and the load status of the local cell and the neighboring cell, the local cell negotiates with the neighboring cell to configure the physical resource block PRB2 and the physical resource block PRB3 as C pictures.
  • the transmitting end uses the C picture multiplexing mode for data transmission in the resource area, and correspondingly, if the receiving end is scheduled by the data in the resource area, the receiving end is in the foregoing
  • the data is interpreted in the resource area according to the C-picture multiplexing method.
  • FIG. 3 is a schematic diagram of another resource region configured by the cell and the neighboring cell to negotiate a signal transmitted by the C picture multiplexing mode.
  • the local cell (Cell 2) negotiates with the neighboring cell (Cell 1) to configure the overlapping resource of the PUSCH resource of the local cell and the PUCCH resource of the neighboring cell as the C reusing side.
  • the uplink data may also be spread according to the LTE system uplink ACK/NACK time-frequency two-dimensional spread spectrum, and the same physicality as PUCCH forma t 1/ la/lb
  • the C picture is multiplexed and transmitted on the resource.
  • Step 103 Transmit C-picture resource configuration information in an implicit manner or an explicit manner.
  • the location of the physical resource in the C resource configuration information, and/or the physical resource size may be known in advance by the transmitting end and the receiving end, or may be explicitly indicated by the transmitting end by using a bit or a field.
  • the location and size of the physical resource may be a continuous resource allocation manner of the LTE system, or a non-contiguous resource allocation. The way, or according to the allocation of bi tmap is determined by the bit or field explicit indication.
  • the C-resource resource configuration information may be transmitted in an implicit manner; if the content of the C-picture resource configuration information is explicitly indicated by the sender through a bit or a field
  • the C-picture resource configuration information may be explicitly transmitted by a physical broadcast PBCH channel, or a dynamic broadcast DBCH channel, or an RRC dedicated signaling, or a physical layer control channel; to save signaling overhead, when the cell needs a CDM complex
  • the transmitting end may transmit the configuration information of the C-resource by means of broadcast.
  • the transmitting end may adopt a proprietary signaling manner. Transfer C picture resource configuration information.
  • Step 104 Notify the receiving end of the multiplexing mode of the to-be-transmitted signal of the local cell; and notify the receiving end that the multiplexing mode of the to-be-transmitted signal of the local cell may include the following manners:
  • one bit can be added to the information carried in the PDCCH to indicate whether the PDSCH or PUSCH transmission adopts the C picture multiplexing mode or the second multiplexing mode. If the state of the added one bit is 0, it indicates that the PDSCH or PUSCH transmission adopts the C picture multiplexing mode; if the state of the added one bit is 1, it indicates that the PDSCH or the PUSCH transmission adopts the second multiplexing mode; It is also possible to use the redundancy field or the redundancy status in the PDCCH bearer information to indicate whether the PDSCH or PUSCH transmission adopts the C picture multiplexing mode or the second multiplexing mode.
  • padding bits padding b i t s in the PDCCH for uplink scheduling there are redundant padding bits padding b i t s in the PDCCH for uplink scheduling, and these padding bits can be used to indicate whether the PUSCH transmission adopts the C multiplex mode or the second multiplex mode. For example, if there is a padding bit, when the state of the padding bit is 0, it indicates that the PUSCH transmission adopts the C multiplex mode; when the state of the padding bit is 1, it indicates that the PUSCH transmission adopts the second multiplexing mode. .
  • the frequency hopping transmission of the PUSCH is disabled to disable the di s ab ed state; therefore, the frequency hopping transmission indication bit hopp ng bit can be used to indicate that the PUSCH transmission is a C-picture complex.
  • the mode of use is still the second multiplexing mode.
  • the information carried by the PDCCH includes a carrier index indication (CIF, Carrier Index Indi ca tor) field, the redundancy state or redundant bits of the CIF field may be used to indicate that the PDSCH or PUSCH transmission is performed.
  • the CDM multiplexing method is also the second multiplexing method.
  • the length of the CIF field is 3 bits, and the number of carriers in the carrier set configured by the transmitting end for the receiving end is less than or equal to 4, then 2 bits in the CIF are still used to indicate the carrier index, and another 1 bit in the CIF is used. It is indicated whether the PDSCH or the PUSCH adopts a C multiplex mode or a second multiplex mode.
  • the PDSCH or PUSCH transmission adopts the C picture multiplexing mode; if the receiving end correctly detects the physical downlink control channel by using the scrambling code 2, it is considered that the PDSCH or the PUSCH transmission adopts the second multiplexing side.
  • the multiplexing mode of the to-be-transmitted signal of the local cell may be implicitly notified according to the information of the resource area of the signal to be transmitted in the local cell; for example, when the transmitting end broadcasts the C-picture resource configuration information, and the transmitting end is the PDSCH of a certain receiving end.
  • the scheduling resource of the PUSCH is included in the C-picture resource area indicated by the C-picture resource configuration information of the broadcast, the receiving end considers that the transmission of the PDSCH or the PUSCH is a C-picture multiplexing method.
  • a new information element (information a t i on e lement ) to the RRC dedicated signaling, and use the information element to indicate whether the PDSCH or PUSCH transmission adopts a C multiplex mode or a second multiplex mode.
  • Ref. 18 Ref. * • * Ref. 19 Ref. * • * Ref. 20 Ref. 6 Ref. 18
  • This embodiment can also include the following steps:
  • Step 106 Configure a codeword for spreading the signal transmitted by the C picture multiplexing mode, or configure a codeword for spreading the signal transmitted by the C picture multiplexing mode by negotiating with the neighboring cell, or negotiate with the neighboring cell as C
  • the signal transmitted in the multiplexing mode configures the codeword resources available to the cell and the neighboring cell.
  • the codeword index index here may be a codeword index of a set of spreading codewords of the spreading codeword available at the transmitting end, or a cyclic shift value of a certain spreading sequence, or indicating a certain spreading sequence.
  • the index of the cyclic shift value, or other index capable of indicating the spreading sequence may be a codeword index of a set of spreading codewords of the spreading codeword available at the transmitting end, or a cyclic shift value of a certain spreading sequence, or indicating a certain spreading sequence.
  • the index of the cyclic shift value, or other index capable of indicating the spreading sequence When performing C-picture multiplex transmission on the same physical resource, different data streams are spread-modulated by different spreading codewords or spreading sequences, and the receiving end needs to know when the transmitting end transmits to the receiving end C multiplex mode. The codeword index used, so that the receiving end performs correct data detection.
  • the sender may determine the length of the codeword used by the C-picture multiplexing mode of the cell according to the autocorrelation and cross-correlation characteristics of the spreading codeword and the codeword resources available in the cell, and the interference strength of the cell. Codeword index; Considering interference coordination between cells, the sender may also negotiate with the neighboring cell to configure a codeword for spreading in the C-multiplex mode, or negotiate with the neighboring cell to transmit in C-picture multiplexing mode.
  • the signal is used to configure the codeword resources available to the cell and the neighboring cell, so that the codeword used by the cell to transmit the C-multiplexed signal is orthogonal to the codeword used by the neighboring cell to use the C-multiplexed transmission signal. Low cross-correlation properties, thereby suppressing interference between cells.
  • FIG. 4 is a schematic diagram showing the codeword resources available for the signal configuration of the two macro cells Macro ee l 1 and its coverage area Pi co ce ll negotiated for CDM multiplexing transmission.
  • the codeword resource used by Macrocell 1 can be orthogonal (or quasi-orthogonal) to the codeword resources of the Pico cell under Macro eel 12 and/or Macro cell 1.
  • the codeword resource coordination information is transmitted between different cells through an X2 interface or an air interface, and the codeword resource coordination information includes a configurable codeword or codeword index set, and/or a configured codeword or codeword index set, and/or The unconfigured codeword or codeword index set, and/or the spread codeword length information, and/or the characteristics of the spread codeword including information such as the type of the spread codeword, the base sequence of the spread codeword, and the like.
  • the spread codeword index is configured by the RRC dedicated signaling, or the information field in the PDCCH, to indicate the signal transmitted for the C-multiplex mode.
  • a new information element may be added to the RRC dedicated signaling to indicate the codeword index used by the downlink PDSCH or the uplink PUSCH in the CDM multiplexing mode. For example, if the uplink PUSCH data transmission uses the CAZAC sequence for spread spectrum modulation, and different receiving ends in one cell can be multiplexed and transmitted on the same physical resource, the spreading sequences of the different receiving ends are determined by the same CAZAC sequence. Different cyclic shifts are generated.
  • the sender may configure a codeword index for the uplink PUSCH C picture multiplexing for the receiving end in the RRC dedicated signaling, and may also add a new field in the PDCCH to indicate the code word used for the uplink PUSCH C picture multiplexing. index.
  • Step 107 Determine, by using an index of the configured spreading codeword, a physical hybrid indicator channel PHICH channel index corresponding to the physical uplink shared channel PUSCH transmitted by the C picture.
  • PHICH channel index C or (“OT ZH") is determined by:
  • PHICH L PRB RA 1 v PHICH n DMRS 1 v
  • SF the index group number parameter, which is the index number parameter
  • ⁇ the spreading factor, which is the minimum PRB occupied by the uplink data transmission block transmission.
  • the index of the label n is the value of the n-picture RS, which is the number of PHICH groups reserved for the uplink carrier with the downlink carrier associated with the current uplink carrier, and the IH is configured with 0 and 5th in the uplink and downlink subframe of the TDD system. Set to 1 when transmitting the upstream data block in the 10th subframe, and set to 0 in other cases.
  • the sender needs to set different values of the n-picture RS so that the PHICH indexes of the receivers multiplexed on the same resource are different.
  • setting different n-picture RS values does not completely avoid collision of PHICH index. Therefore, for PHICH mapping with greater degrees of freedom, the index cw of the configured CDM codeword can be introduced into the determination of the PHICH index as follows.
  • the transmitting the to-be-transmitted signal of the cell to be transmitted according to the multiplexing mode of the to-be-transmitted signal of the cell may include: according to the multiplexing mode of the to-be-transmitted signal of the local cell, the cell and the neighboring cell jointly transmit and transmit the signal to be transmitted by the cell.
  • the cell and the neighboring cell may also perform joint spread spectrum data transmission for the data of the same receiving end.
  • the macro base station Macro eNB1 (the local cell) and the Macro eNB2 (the neighboring cell) jointly perform the spread spectrum data transmission for the data of the receiving end UE1 (the signal to be transmitted by the local cell), that is, the Macro eNB1 and the Macro eNB 2
  • the same data stream of the UE 1 is spread with different codewords respectively, and the UE 1 simultaneously receives data transmitted by the Macro eNB1 and the Macro eNB 2 to improve the reliability of data transmission.
  • Macro eNB1 and Macro eNB2 can respectively spread different data streams of UE1 with different codewords, and UE1 simultaneously receives data transmitted by Macro eNB1 and Macro eNB2 to improve data transmission rate.
  • transmitting the to-be-transmitted signal of the local cell according to the multiplexing manner of the to-be-transmitted signal of the local cell may further include performing data transmission by using a C-picture multiplexing manner on the Backhaul link. If the channel quality of the Backhaul link is good, in order to improve the transmission capacity of the Backhaul link, you can use the C-multiplex mode for data transmission on the Backhau l link.
  • the c-picture multiplexing mode used indicates that the resource area determination, the codeword resource configuration, and the codeword index indication in the c-picture multiplexing mode can be determined according to the above steps.
  • a signal transmission method provided by an embodiment of the present invention can adaptively select a multiplexing mode according to interference intensity, thereby reducing inter-cell interference, improving channel detection reliability, reducing system complexity, and saving cost. It is also possible to make the process of adaptive selection more flexible through configuration steps and notification steps. It is also possible to improve the reliability of data reception by joint spread spectrum transmission and improve resource reuse efficiency.
  • FIG. 6 is a schematic diagram of another transmission method of a signal according to an embodiment of the present invention. The embodiment includes: Step 601: Acquire a multiplexing mode of the to-be-transmitted signal of the local cell that is transmitted by the sending end. Step 602: Receive a to-be-transmitted signal of the cell according to the multiplexing mode of the to-be-transmitted signal of the local cell.
  • the executor of the embodiment of the present invention is a receiving end, for example, may be a base station, or a macro base station, or a Re yy node, or a P i co base station, or a home base station, or a user equipment UE.
  • the embodiments of the present invention are used in conjunction with the transmitting end described in the embodiment of FIG. 1.
  • the receiving end first acquires a multiplexing manner of the to-be-transmitted signal of the local cell that is transmitted by the transmitting end.
  • the anti-interference multiplexing mode can be selected according to the indication when the interference intensity is strong, and the multiplexing method with weak anti-interference ability is selected when the interference intensity is low.
  • the receiving end can receive the signal to be transmitted according to the multiplexing mode.
  • Obtaining a multiplexing manner of the to-be-transmitted signal of the local cell that is transmitted by the transmitting end may include the following:
  • step 603 the C-picture resource configuration information is obtained, and the resource area transmitted by the C-picture multiplexing mode is determined according to the acquired C-picture resource configuration information.
  • a signal transmission method provided by an embodiment of the present invention can perform signal transmission according to a multiplexing mode selected by a transmitting end, thereby reducing inter-cell interference, improving channel detection reliability, reducing system complexity, and saving cost.
  • FIG. 7 is a schematic diagram of a signal transmission device according to an embodiment of the present invention.
  • the embodiment includes: a selection module 701, configured to select a multiplexing mode of the to-be-transmitted signal according to the interference strength received by the current cell, and/or the interference strength received by the neighboring cell; the notification module 702, configured to notify The multiplexing mode of the to-be-transmitted signal of the local cell is received by the receiving end; the transmitting module 703 is configured to transmit the to-be-transmitted signal of the local cell according to the multiplexing mode of the to-be-transmitted signal of the local cell.
  • the cell to be transmitted selects a code division multiplexing C picture multiplexing mode, otherwise, the cell is to be transmitted.
  • the signal selects the second multiplexing mode.
  • the second multiplexing mode is a multiplexing mode of orthogonal frequency division multiplexing OF picture, or a multiplexing mode of single carrier frequency division multiplexing SC-F drawing A, or a multiplexing mode of frequency division multiplexing F picture, Or time division multiplexing of T picture multiplexing.
  • the notification module can be used to:
  • the multiplexing mode of the to-be-transmitted signal of the local cell is notified by using the MCS field.
  • the configuration module 704 may further include a configuration module 704, configured to allocate a resource region for the signal transmitted by the C-picture multiplexing mode, or negotiate a resource configuration area for the signal transmitted by the C-multiplex mode.
  • the embodiment may further include an indication module 705, configured to transmit C-picture resource configuration information in an implicit manner or an explicit manner.
  • the embodiment may further include a codeword configuration module 706, configured to configure a coded codeword for a signal transmitted by the C picture multiplexing mode, or negotiate with a neighboring cell to configure a spread spectrum signal for the C multiplex mode transmission signal.
  • the codeword, or the signal transmitted by the neighboring cell for the C-multiplex mode configures the codeword resources available to the cell and the neighboring cell.
  • the determining module 707 is further configured to determine, by using an index of the configured spreading codeword, a physical hybrid indicator channel PHICH channel index corresponding to the physical uplink shared channel PUSCH transmitted by the C picture.
  • the transmission module can be used to:
  • a signal transmission device provided by an embodiment of the present invention can adaptively select a multiplexing mode according to an interference strength, thereby reducing inter-cell interference, improving channel detection reliability, reducing system complexity, and saving cost. It is also possible to make the process of adaptive selection more flexible by configuring modules and indicating modules. It is also possible to improve the reliability of data reception by joint spread spectrum transmission and improve resource reuse efficiency.
  • FIG. 8 is a schematic diagram of another transmission device of a signal according to an embodiment of the present invention.
  • the embodiment includes: an obtaining module 801, which acquires a multiplexing mode of the to-be-transmitted signal of the local cell that is transmitted by the transmitting end, and a receiving module 802, which is configured to receive the cell to be transmitted according to the multiplexing mode of the to-be-transmitted signal of the local cell. Lose signal.
  • This embodiment is used to complete the method described in FIG. 6, and details are not described herein again.
  • the resource configuration information obtaining module 803 is configured to obtain the C-resource resource configuration information, and determine the resource region to be transmitted by using the C-picture multiplexing mode according to the acquired C-picture resource configuration information.
  • a signal transmission device provided by an embodiment of the present invention can perform signal transmission according to a multiplexing mode selected by a transmitting end, thereby reducing inter-cell interference, improving channel detection reliability, reducing system complexity, and saving cost.
  • 9 is a schematic diagram of a system of signals in accordance with an embodiment of the present invention. The embodiment includes: a transmitting end 901 as described in the embodiment; a receiving end 902 as described in the embodiment of FIG.
  • the embodiments of the present invention are used to implement the method described in the embodiment of FIG. 1 and the embodiment of FIG. 5, and are not described herein.
  • a signal transmission system provided by an embodiment of the present invention can adaptively select a multiplexing mode according to an interference strength, thereby reducing inter-cell interference, improving channel detection reliability, reducing system complexity, and saving cost.
  • the invention can be implemented by means of software plus the necessary general hardware, and of course also by hardware, but in many cases the former is a better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. , a hard disk or an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the above-described methods of various embodiments of the present invention.

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Description

一种信号的传输方法、 装置和系统
本申请要求于 2010 年 5 月 7 日提交中国专利局、 申请号为 201010172893.X, 发明名称为 "一种信号的传输方法、 装置和系统" 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， 尤其涉及一种信号的传输方法、装置和系 统。 发明背景 为了满足新一代通信系统的性能需求， 通过在同构网络（homogeneous network)系统中的宏基站（Macro eNodeB)覆盖范围内部署低功率的基站或 发射 /接收节点 (如 mi cro eNodeB, i co eNodeB, Home eNodeB, Re lay eNodeB, RRH等 acces s po int)， 可以增强宏基站覆盖范围内的热点区域覆盖、 室内 盲点覆盖、 宏基站的小区边缘覆盖， 并提升小区平均吞吐量、 小区边缘吞 吐量、 小区的上行 /下行频谱利用率等。
为了提高系统的频谱利用效率， 可以使得低功率基站（或低功率基站服 务的用户设备）和宏基站（或宏基站服务的用户设备）进行（完全或部分）频 谱复用。 由于低功率基站（或低功率基站服务的用户设备)使用了和宏基站 (或宏基站服务的用户设备)相同的载波资源， 因此低功率基站（或低功率基 站服务的用户设备）和宏基站（或宏基站服务的用户设备）彼此之间会产生 同道 (或同频）干扰。 干扰会影响低功率基站（或低功率基站服务的用户设备) 及宏基站（或宏基站服务的用户设备)信道（包括控制信道及数据信道)检测 的可靠性。 目前主要采用频率域或时间域规避的方法降低或消除小区间因 为频率复用而产生的干扰。 发明人发现， 现有技术在进行频谱复用时， 使用频率域规避方法时小 区间干扰较大， 使用时间域规避方法时系统复杂度较高。 发明内容 本发明实施例提供了一种信号的传输方法、 装置和系统， 用以降低小 区间干扰， 以及降低系统复杂度。
本发明实施例提供的一种信号的传输方法包括：
根据本小区所受到的干扰强度， 和 /或相邻小区所受到的干扰强度选择 本小区待传输信号的复用方式；
通知接收端所述本小区待传输信号的复用方式；
按照所述本小区待传输信号的复用方式传输本小区待传输信号。
本发明实施例提供的一种信号的传输方法包括：
获取发送端传输的所述本小区待传输信号的复用方式；
按照所述本小区待传输信号的复用方式接收本小区待传输信号。
本发明实施例提供的一种信号的传输设备包括：
选择模块， 用于根据本小区所受到的干扰强度， 和 /或相邻小区所受到 的干扰强度选择本'■!、区待传输信号的复用方式；
通知模块， 用于通知接收端所述本小区待传输信号的复用方式； 传输模块， 用于按照所述本小区待传输信号的复用方式传输本小区待 传输信号。
本发明实施例提供的一种信号的传输设备包括：
获取模块， 获取发送端传输的所述本小区待传输信号的复用方式； 接收模块， 按照所述本小区待传输信号的复用方式接收本小区待传输 信号。
本发明实施例提供的一种信号的传输系统包括：
上述一种信号的传输设备的发送端；
上述一种信号的传输设备的接收端。 本发明实施例提供的一种信号的传输方法、 装置和系统， 根据干扰强 度， 自适应选择复用方式， 从而降低了小区间干扰， 提高信道检测的可靠 性， 以及降低系统复杂度， 节省成本。 附图简要说明 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 实施例或现有技术描述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为本发明实施例信号的传输方法的示意图；
图 2为本小区与相邻小区协商为 C画复用方式传输的信号配置资源区 域示意图；
图 3为本小区与相邻小区协商为 C画复用方式传输的信号配置另一资 源区域示意图；
图 4为两个宏小区及其覆盖范围内的微小区协商为 CDM复用方式传输 的信号配置可用的码字资源示意图；
图 5为宏基站 Macro eNBl和 Macro eNB2为 UE1按照 CDM复用方式联 合扩频传输本小区待传输信号示意图；
图 6为本发明实施例信号的另一种传输方法的示意图；
图 Ί为本发明实施例信号的传输设备的示意图；
图 8为本发明实施例信号的另一种传输设备的示意图；
图 9为本发明实施例信号的系统的示意图。 实施本发明的方式 图 1为本发明实施例信号的传输方法的示意图。 本实施例包括： 步骤 101， 根据本小区所受到的干扰强度， 和 /或相邻小区所受到的干 扰强度选择本小区待传输信号的复用方式； 步骤 104， 通知接收端所述本小区待传输信号的复用方式； 步骤 105，按照所述本小区待传输信号的复用方式传输本小区待传输信 号。
本发明实施例的执行主体为发送端， 例如， 发送端可以为基站， 或宏 基站， 或 Re l ay节点， 或 Pi co基站， 或家庭基站， 或用户设备 UE。
本发明实施例步骤 101 中发送端首先根据本小区所受到的干扰强度， 和 /或相邻小区所受到的干扰强度， 选择本小区待传输信号的复用方式。 这 样可以在本小区或相邻小区所受干扰强度较强的时候选择抗干扰能力较强 的复用方式， 而在本小区或相邻小区所受干扰强度较低的时候选择抗干扰 能力较弱的复用方式。 在为本小区待传输信号选择复用方式之后， 发送端 需要将选择的复用方式通知接收端， 以使得接收端可以使用正确的复用方 式接收本小区待传输信号。 最后发送端按照选择的复用方式将本小区待传 输信号传输给接收端。
本发明实施例中所述本小区所受到的干扰强度可以为本小区内的发送 端或接收端基于导频测量获得本小区物理资源上的干扰强度， 和 /或接收端 上报的本小区物理资源上的干扰强度； 本发明实施例中所述本小区物理资 源或物理资源可以是时间域资源， 或频率域资源， 或时间域资源与频率域 资源组合构成的资源； 本小区物理资源可以是单个下行链路上的传输信号 占用的物理资源， 和 /或是单个上行链路上的传输信号占用的物理资源， 和 /或是多个下行链路上的传输信号占用的物理资源， 和 /或是多个上行链路 上的传输信号占用的物理资源。
本小区根据邻区信号测量， 和 /或用户设备上报信息， 和 /或网络设置 信息确定相邻小区； 相邻小区可以是单个小区， 也可以是多个小区的集合； 相邻小区所受到的干扰强度具有上述本小区所受到的干扰强度类似的定 义， 这里不再赘述。 本小区可以与相邻小区通过 X2接口， 或空中无线接口 传递或者交互本小区及相邻小区所受到的干扰强度或者干扰强度标识信 息。
本发明实施例中所述本小区待传输信号是指： 在本小区覆盖范围内等 待被传输的信号； 等待被传输的信号可以是单个下行链路上的传输信号， 和 /或是单个上行链路上的传输信号， 和 /或是多个下行链路上的传输信号， 和 /或是多个上行链路上的传输信号。
本发明实施例中根据本小区所受到的干扰强度， 和 /或相邻小区所受到 的干扰强度选择本小区待传输信号的复用方式可以包括： 若本小区所受到的干扰强度， 和 /或相邻小区所受到的干扰强度大于或 等于第一阀值， 本小区待传输信号选择码分复用 C画复用方式， 否则， 本 小区待传输信号选择第二复用方式。 所述第二复用方式为正交频分复用
OF画的复用方式，或单载波频分复用 SC-F画 A的复用方式，或频分复用 F丽 的复用方式， 或时分复用 T画 的复用方式。 上述第一阀值可以根据本小区 所受到的干扰强度， 和 /或相邻小区所受到的干扰强度， 和 /或本小区已传 输信号的传输性能， 和 /或本小区待传输信号的业务类型需求来确定。
若本小区所受到的干扰强度， 和 /或相邻小区所受到的干扰强度大于或 等于第一阀值， 则认为干扰强度较大， 因此选择抗干扰能力较强的 C画复 用方式， 如果小于第一阀值， 则认为干扰强度较小， 因此可以选择抗干扰 能力较弱的第二复用方式。
如一个发送端 a服务的接收端 UEa在上行 PUSCH传输采用 SC-F丽 A的 复用方式时， 若发送端 a检测到 UEa的上行 PUSCH传输所受到的干扰强度 大于或等于第一阀值， 则发送端 a配置 UEa用 C画复用方式传输 PUSCH; 若 UEa先前采用 SC-FDMA复用方式的 PUSCH传输所受到的强干扰信号是采用 C画复用方式传输， 则发送端 a优先在上述强干扰信号的物理资源上配置 UEa采用 C画复用方式传输 PUSCH。
本实施例还可以包括以下步骤：
步骤 1 02， 为 C画复用方式传输的信号配置资源区域， 或与相邻小区协 商为 C画复用方式传输的信号配置资源区域。 发送端可以根据以下的一种 或多种组合为 C画复用方式传输的信号配置资源区域： 根据本小区上所受到的干扰分布， 和 /或本小区的传输性能分布， 和 / 或本小区负载状况为 C画复用方式传输的信号配置资源区域； 根据本小区 及相邻小区所受到的干扰分布， 和 /或本小区及相邻小区的传输性能分布， 和 /或本小区及相邻小区负载状况， 与相邻小区协商为 C画复用方式传输的 信号配置 CDM资源区域； 根据相邻小区的 PUCCH资源分配信息， 在本小区 PUSCH资源与相邻小区 PUCCH资源的交叠资源上为 C丽复用方式传输的信号 配置资源区域。
上述本小区 PUSCH资源与相邻小区 PUCCH资源的交叠资源是指本小区 的 PUSCH配置资源与相邻小区的 PUCCH配置资源的资源重叠部分。 上述资源区域可以由 C画资源配置信息确定。 所述 CDM资源配置信息 包括以下一项或任意项组合： 配置的或协商配置的物理资源的大小， 物理 资源的位置。 物理资源的大小可以包括以下一项或任意项组合： 物理资源 块的数量， 子载波的数量。 物理资源的位置可以包括以下一项或任意项组 合： 子载波的位置， 物理资源块的位置， 子带位置、 物理资源传输的子帧 位置， 物理资源配置的周期， 物理资源的跳频图样。
图 2为本小区（小区 1)和相邻小区（小区 2)之间协商为 C画复用方式传 输的信号配置资源区域示意图。 如图 2 所示， 基于本小区及相邻小区所受 到的干扰分布， 和本小区及相邻小区负载状况， 本小区与相邻小区协商将 物理资源块 PRB2和物理资源块 PRB3配置成为 C画复用方式传输的信号的 C画资源区域； 发送端在上述资源区域内采用 C画复用方式进行数据传输， 相应地， 若接收端在上述资源区域内被数据调度， 则该接收端在上述资源 区域内按照 C画复用方式解译数据。
图 3为本小区和相邻小区之间协商为 C画复用方式传输的信号配置另 一资源区域示意图。 如图 3所示， 本小区（小区 2)与相邻小区（小区 1)协商 将本小区 PUSCH资源与相邻小区 PUCCH资源的交叠资源配置为 C丽复用方 式传输的资源区域； 当 PUSCH在上述交叠资源上采用 C画复用方式传输时， 上行数据被长度为 12 的 CAZAC 序列扩频调制后， 可以和 PUCCH forma t 2/2a/2b在相同的物理资源上进行 C画复用传输； 类似的， 上行数据也可以 按照 LTE 系统上行 ACK/NACK 时频两维扩频的方式进行扩频， 并和 PUCCH forma t 1/ la/lb在相同的物理资源上进行 C画复用传输。
本实施例还可以包括以下步骤：
步骤 103， 通过隐式方式或者显式方式传输 C画资源配置信息。
C画资源配置信息中的物理资源的位置， 和 /或物理资源大小可以是发 送端和接收端预先共知的， 也可以由发送端通过比特或字段来显式指示。 当采用显式的方式指示 C画资源配置信息中的物理资源的位置， 和 /或物理 资源大小时， 上述物理资源的位置、 大小可以采用 LTE 系统的连续资源分 配的方式、 或者非连续资源分配的方式， 或者按照 b i tmap的分配方式由比 特或字段显式指示确定。
若 CDM资源配置信息的内容是发送端和接收端预先共知的， 则 C丽资 源配置信息可以通过隐式方式传输； 若 C画资源配置信息的内容是由发送 端通过比特或者字段显式指示时，则 C画资源配置信息可以由物理广播 PBCH 信道， 或动态广播 DBCH信道， 或 RRC专用信令， 或物理层控制信道等显式 方式传输； 为了节省信令开销， 当本小区需要 CDM复用方式传输的信号数 量较多时， 发送端可以通过广播的方式传输 C丽 资源配置信息， 当本小区 需要 C画复用方式传输的信号数量较少时， 发送端可以通过专有信令的方 式传输 C画资源配置信息。
本实施例还包括以下步骤： 步骤 104， 通知接收端所述本小区待传输信号的复用方式； 通知接收端 所述本小区待传输信号的复用方式可以包括以下方式：
在物理下行控制信道 PDCCH上通知所述本小区待传输信号的复用方式； 或根据 PDCCH 的循环冗余校验比特的不同加扰码字， 或所述本小区待传输 信号的资源区域的信息隐式通知所述本小区待传输信号的复用方式； 或在 无线资源控制 RRC信令上通知所述本小区待传输信号的复用方式； 或通过 MCS字段通知所述本小区待传输信号的复用方式。
如可以在 PDCCH ^ 载的信息中增加 1个比特用于指示 PDSCH或者 PUSCH 传输采用的是 C画复用方式还是第二复用方式。 若上述增加的 1个比特的 状态为 0时， 表示 PDSCH或者 PUSCH传输采用 C画复用方式； 若上述增加 的 1个比特的状态为 1时， 表示 PDSCH或者 PUSCH传输采用第二复用方式； 还可以利用 PDCCH承载信息中的冗余字段或者冗余状态来指示 PDSCH或者 PUSCH传输采用的是 C画复用方式还是第二复用方式。 例如在 FDD系统中， 用于上行调度的 PDCCH中有冗余的填充比特 padding b i t s , 可以利用这些 填充比特来指示 PUSCH传输采用的是 C丽复用方式还是第二复用方式。 比 如有 1位填充比特， 当该填充比特的状态是 0时， 表示 PUSCH传输采用的 是 C丽复用方式； 当该填充比特的状态是 1时， 表示 PUSCH传输采用的是 第二复用方式。再例如规定 PUSCH传输采用非连续资源分配时， PUSCH的跳 频传输 hopp ing为禁用 di s ab l ed状态； 因此跳频传输指示位 hopp i ng b i t 可以用来指示 PUSCH传输采用的是 C画复用方式还是第二复用方式。 另外， 例如若 PDCCH 承载的信息中包含了载波索引指示 （CIF，， Car r i er Index Indi ca tor)字段，则可以利用 CIF字段的冗余状态或冗余比特来指示 PDSCH 或者 PUSCH传输采用的是 CDM复用方式还是第二复用方式。 如 CIF字段的 长度是 3比特，且发送端为接收端配置的载波集合中的载波数目小于等于 4 时， 则仍使用 CIF中的 2个比特指示载波索引， 而使用 CIF中的另外 1个 比特指示 PDSCH或者 PUSCH采用的是 C丽复用方式还是第二复用方式。
还可以通过隐性信息指示 PDSCH或者 PUSCH传输采用的是 C画复用方 式还是第二复用方式。 例如可以根据 PDCCH 的循环冗余校验比特的不同加 扰码字来指示 PDSCH或者 PUSCH传输采用的是 C画复用方式还是第二复用 方式。 如， 接收端用扰码 1 正确检测物理下行控制信道， 则该接收端认为
PDSCH或者 PUSCH传输采用的是 C画复用方式；若该接收端用扰码 2正确检 测物理下行控制信道， 则认为 PDSCH或者 PUSCH传输采用的是第二复用方 式。 例如还可以根据本小区待传输信号的资源区域的信息隐性通知所述本 小区待传输信号的复用方式； 如当发送端广播了 C画资源配置信息，且发送 端为某个接收端的 PDSCH或者 PUSCH的调度资源被包含在上述广播的 C画 资源配置信息指示的 C画资源区域内时， 该接收端认为 PDSCH或者 PUSCH 的传输采用的是 C画复用方式。
还可以在 RRC专有信令中增添新的信息元素 （ informa t i on e lement )， 用该信息元素指示 PDSCH或者 PUSCH传输采用的是 C丽复用方式还是第二 复用方式。
还可以利用调制编码方法 MCS (modu l a t i on and coding s cheme)字段中 的某些状态来指示 PDSCH或者 PUSCH传输采用的是 C丽复用方式还是第二 复用方式。 如表 1所示， 当调制编码方法索引 Imcs属于集合 {3， 8， 18， 19}时， 则指示采用 C画复用方式。 若接收端的 PDCCH中的 MCS字段指示的 Imcs属于上述 {3， 8， 18， 19}集合时， 则接收端就获知了下行的 PDSCH传 输或者上行的 PUSCH传输是采用 C画复用方式。 需要指出的是上述用于指 示 C画复用方式时的 Imcs集合只是出于示意， 实际上发送端可以配置任意 的 Imcs集合用于指示 C画复用方式的传输。
表 1 : 利用 MCS的状态指示 C画复用方式
Figure imgf000011_0001
參 8 參 * 參 * 參 • 參 • 參 .
參 參 參 .
參 . 參 參 .
參 18 參 * • * 參 19 參 * • * 參 20 參 6 參 18 本实施例还可以包括以下步骤：
步骤 106， 为 C画复用方式传输的信号配置扩频的码字， 或与相邻小区 协商为 C画复用方式传输的信号配置扩频的码字，或与相邻小区协商为 C丽 复用方式传输的信号配置本小区及相邻小区可用的码字资源。
这里的码字索引 index可以是一个扩频码字在发送端可用的扩频码字 集合中的码字索引， 或是某一个扩频序列的循环移位值， 或是指示某一个 扩频序列的循环移位值的索引， 或是其它能够指示扩频序列的索引等。 当 在同一物理资源上进行 C画复用传输时， 不同的数据流被不同的扩频码字 或扩频序列进行扩频调制， 接收端需要知道发送端给接收端 C丽复用方式 传输时所用的码字索引， 从而使接收端进行正确的数据检测。 发送端可以 根据扩频码字的自相关和互相关特性， 以及本小区可用的码字资源， 本小 区所受干扰强度决定本小区采用 C画复用方式的待传输信号所用的码字长 度及码字索引； 考虑到小区间的干扰协调， 发送端也可以与相邻小区协商 为 C丽复用方式传输的信号配置扩频的码字， 或与相邻小区协商为 C画复 用方式传输的信号配置本小区及相邻小区可用的码字资源， 以使本小区采 用 C丽复用传输的信号所用的码字与相邻小区采用 C丽复用传输信号所用 的码字正交或者具有低的互相关特性， 从而抑制小区间的干扰。
图 4示意了两个宏小区 Macro ee l 1及其覆盖范围内的 小区 Pi co ce l l 协商为 CDM复用方式传输的信号配置可用的码字资源示意图。 为了降低小 区间的干扰， Macro cell 1使用的码字资源可以与 Macro eel 12和 /或 Macro cell 1下的 Pico cell的码字资源保持正交（或准正交）。 不同小区之间通 过 X2接口或者空口传递码字资源协调信息， 码字资源协调信息包括可配置 的码字或码字索引集合， 和 /或已配置的码字或码字索引集合， 和 /或未配 置的码字或码字索引集合， 和 /或扩频码字长度信息， 和 /或包括扩频码字 的类型、 扩频码字的基序列等信息的扩频码字的特性。
通过 RRC专用信令、 或 PDCCH中的信息字段指示所述为 C丽复用方式 传输的信号配置扩频的码字索引。 可以在 RRC专有信令中增添新的信息元 素（information element)来指示下行的 PDSCH或者上行 PUSCH采用 CDM复 用方式时使用的码字索引。 如， 若上行 PUSCH数据传输采用 CAZAC序列进 行扩频调制， 且一个小区内的不同接收端在相同的物理资源上可以 C画复 用传输， 上述不同接收端的扩频序列是由同一个 CAZAC序列根据不同的循 环移位生成。 因此， 发送端可以在 RRC专有信令中为接收端配置上行 PUSCH C画复用所用的码字索引， 还可以在 PDCCH 中增添新的字段用于指示上行 PUSCH C画复用所用的码字索引。
本实施例还可以包括以下步骤：
步骤 107，通过配置的扩频码字的索引确定 C画传输的物理上行共享信 道 PUSCH对应的物理混合指示信道 PHICH信道索引。
现有技术中 PHICH 信道索引 C, 或者（" OT ZH)由下式确 定：
y. gro p _ / τ lowest index 、 nc\ AfgrOUp 4- T ]J g醒 P
"PHICH _ 2 PRB RA nDMRS ) PHICH 1 PHICH 1 V PHICH
= Λ j lowest Jndex , ^ group | )mod27V T PHICH
"PHICH L PRB RA 1 v PHICH nDMRS ) 1 v , SF 这里， "S 为索引组号参数， 为索引序号参数， Γ"为扩频因子， 是上行数据传输块传输时所占用的 PRB 的最小标号索引， n画为 n-画 RS的数值， 是与当前上行载波相关联的下行载波为该上行载波预 留的 PHICH组数， I H在 TDD系统的上下行子帧配置 0且第 5个或第 10个 子帧中传输上行数据块时设置为 1， 其它情况下设置为 0。 若一个小区内的不同接收端在相同的上行物理资源上 CDM复用时， 不 同接收端的 T— '^Τ是相同的。 因此发送端需要设置不同的 n-画 RS的数值以 使在相同资源上 C画复用的接收端的 PHICH index不相同。 实际上， 设置 不同的 n-画 RS值并不能完全避免 PHICH index的碰撞。 因此， 为了更大自 由度的进行 PHICH映射， 可以如下式， 将配置的 CDM码字的 index cw引 入到 PHICH index的确定中。
"PHICH yy1 PRB RA ^ ) inuu VJ ivu T "DMRS ) muu v PHICH τ ι PHICHi pR
r PHICH n?H1CH = (L(C + cw)聽 NPRB I N ^H■ SF 这里 cw为配置的 C画码字的 index; NPRB为传输当前上行数据传输块 的上行载波上的所有 PRB的总数目。 按照所述本小区待传输信号的复用方式传输本小区待传输信号可以包 括按照所述本小区待传输信号的复用方式， 本小区和相邻小区联合扩频传 输本小区待传输信号。
为了提高接收端信号的传输可靠性和提高接收端的数据传输速率， 本 小区和相邻小区还可以为同一个接收端的数据进行联合扩频数据传输。 如 图 5所示， 宏基站 Macro eNBl (本小区 )和 Macro eNB2 (相邻小区 )联合 为接收端 UE1的数据（本小区待传输信号）进行扩频数据传输，即 Macro eNBl 和 Ma c r o eNB 2分别用不同的码字对 UE 1的同一数据流进行扩频， UE 1同时 接收 Macro eNBl和 Macro eNB 2传输的数据， 以提高数据传输的可靠性。 当然 Macro eNBl和 Macro eNB2可以分别用不同的码字对 UE1的不同数据 流进行扩频， UE1同时接收 Macro eNBl和 Macro eNB2传输的数据， 以提高 数据传输速率。
此外， 按照所述本小区待传输信号的复用方式传输本小区待传输信号 还可以包括在 Backhaul链路采用 C画复用方式进行数据传输。若 Backhaul 链路的信道质量比较好时， 为了提升 Backhaul 链路的传输容量， 可以在 Backhau l链路上采用 C丽复用方式进行数据传输， 且 C画复用方式传输时 所用的 c画复用方式指示， c画复用方式时的资源区域确定，码字资源配置、 码字索引指示都可以按照上述步骤确定。
本发明实施例提供的一种信号的传输方法， 可以根据干扰强度， 自适 应选择复用方式， 从而降低了小区间干扰， 提高信道检测的可靠性， 以及 降低系统复杂度， 节省成本。 还可以通过配置步骤以及通知步骤， 使得自 适应选择的过程更加灵活。 还可以通过联合扩频传输提高数据接收的可靠 性， 并且提高资源复用效率。 图 6为本发明实施例信号的另一种传输方法的示意图。 本实施例包括： 步骤 601， 获取发送端传输的所述本小区待传输信号的复用方式； 步骤 602，按照所述本小区待传输信号的复用方式接收本小区待传输信 号。
本发明实施例的执行主体为接收端， 例如， 可以为基站， 或宏基站， 或 Re l ay节点， 或 P i co基站， 或家庭基站， 或用户设备 UE。 本发明实施例 用来与图 1实施例描述的发送端配合使用。
本发明实施例中接收端首先获取发送端传输的所述本小区待传输信号 的复用方式。 这样可以在干扰强度较强的时候根据指示选择抗干扰的复用 方式， 而在干扰强度较低的时候选择抗干扰能力较弱的复用方式。 在获取 复用方式之后， 接收端即可按照这一复用方式接收待传输的信号。
获取发送端传输的所述本小区待传输信号的复用方式可以包括以下方 式：
在物理下行控制信道 PDCCH上接收所述本小区待传输信号的复用方式； 或
根据 PDCCH 的循环冗余校验比特的不同加扰码字， 或所述本小区待传 输信号的资源区域的信息隐式获取所述本小区待传输信号的复用方式； 或 在无线资源控制 RRC信令上接收所述本小区待传输信号的复用方式； 或 通过 MCS字段获取所述本小区待传输信号的复用方式。
本发明实施例还包括以下步骤：
步骤 603， 获取 C画资源配置信息，根据获取的 C画资源配置信息确定 采用 C画复用方式传输的资源区域。
本发明实施例提供的一种信号的传输方法， 可以根据发送端选择的复 用方式进行信号传输， 从而降低了小区间干扰， 提高信道检测的可靠性， 以及降低系统复杂度， 节省成本。 图 7为本发明实施例信号的传输设备的示意图。 本实施例包括： 选择模块 701， 用于根据本小区所受到的干扰强度， 和 /或相邻小区所 受到的干扰强度选择本 、区待传输信号的复用方式； 通知模块 702， 用于通知接收端所述本小区待传输信号的复用方式； 传输模块 703，用于按照所述本小区待传输信号的复用方式传输本小区 待传输信号。
本实施例用于完成图 1描述的方法。 在这里不再赘述。
本实施例中选择模块可以用于：
若本小区所受到的干扰强度， 和 /或相邻小区所受到的干扰强度大于或 等于第一阀值， 本小区待传输信号选择码分复用 C画复用方式， 否则， 本 小区待传输信号选择第二复用方式。 所述第二复用方式为正交频分复用 OF画的复用方式，或单载波频分复用 SC-F画 A的复用方式，或频分复用 F画 的复用方式， 或时分复用 T画的复用方式。
本实施例中通知模块可以用于：
在物理下行控制信道 PDCCH上通知所述本小区待传输信号的复用方式； 或
根据 PDCCH 的循环冗余校验比特的不同加扰码字， 或所述本小区待传 输信号的资源区域的信息隐性通知所述本小区待传输信号的复用方式； 或 在无线资源控制 RRC信令上通知所述本小区待传输信号的复用方式； 或
通过 MCS字段通知所述本小区待传输信号的复用方式。
本实施例中还可以包括配置模块 704，用于为 C画复用方式传输的信号 配置资源区域， 或与相邻小区协商为 C丽复用方式传输的信号配置资源区 域。
本实施例中还可以包括指示模块 705，用于通过隐式方式或者显式方式 传输 C画资源配置信息。
本实施例中还可以包括码字配置模块 706，用于为 C画复用方式传输的 信号配置扩频的码字， 或与相邻小区协商为 C丽复用方式传输的信号配置 扩频的码字， 或与相邻小区协商为 C丽复用方式传输的信号配置本小区及 相邻小区可用的码字资源。
本实施例中还可以包括确定模块 707，用于通过配置的扩频码字的索引 确定 C画传输的物理上行共享信道 PUSCH对应的物理混合指示信道 PHICH 信道索引。
本实施例中传输模块可以用于：
按照所述本小区待传输信号的复用方式联合扩频传输本小区待传输信 号。
本发明实施例提供的一种信号的传输设备， 可以根据干扰强度， 自适 应选择复用方式， 从而降低了小区间干扰， 提高信道检测的可靠性， 以及 降低系统复杂度， 节省成本。 还可以通过配置模块以及指示模块， 使得自 适应选择的过程更加灵活。 还可以通过联合扩频传输提高数据接收的可靠 性， 并且提高资源复用效率。 图 8为本发明实施例信号的另一种传输设备的示意图。 本实施例包括: 获取模块 801， 获取发送端传输的所述本小区待传输信号的复用方式； 接收模块 802，按照所述本小区待传输信号的复用方式接收本小区待传 输信号。
本实施例用于完成图 6所描述的方法， 在这里不再赘述。
本实施例中获取模块可以用于：
在物理下行控制信道 PDCCH上接收所述本小区待传输信号的复用方式； 或
根据 PDCCH 的循环冗余校验比特的不同加扰码字， 或所述本小区待传 输信号的资源区域的信息隐式获取所述本小区待传输信号的复用方式； 或 在无线资源控制 RRC信令上接收所述本小区待传输信号的复用方式； 或
通过 MCS字段获取所述本小区待传输信号的复用方式。
本实施例中还可以包括：
资源配置信息获取模块 803， 用于获取 C丽资源配置信息， 并根据获取 的 C画资源配置信息确定采用 C画复用方式传输的资源区域。
本发明实施例提供的一种信号的传输设备， 可以根据发送端选择的复 用方式进行信号传输， 从而降低了小区间干扰， 提高信道检测的可靠性， 以及降低系统复杂度， 节省成本。 图 9为本发明实施例信号的系统的示意图。 本实施例包括： 如图 Ί实施例中描述的发送端 901 ; 如图 8实施例中描述的接收端 902。
本发明实施例用于实现图 1 实施例和图 5实施例中描述的方法， 在这 里不在赘述。
本发明实施例提供的一种信号的传输系统， 可以根据干扰强度， 自适 应选择复用方式， 从而降低了小区间干扰， 提高信道检测的可靠性， 以及 降低系统复杂度， 节省成本。 通过以上的实施方式的描述， 所属领域的技术人员可以清楚地了解到 本发明可借助软件加必需的通用硬件的方式来实现， 当然也可以通过硬件， 但很多情况下前者是更佳的实施方式。 基于这样的理解， 本发明的技术方 案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出 来， 该计算机软件产品存储在可读取的存储介质中， 如计算机的软盘， 硬 盘或光盘等， 包括若干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网络设备等）执行本发明各个实施例上述的方法。
以上上述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限 于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻 易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明 的保护范围应上述以权利要求的保护范围为准。

Claims

权利要求
1. 一种信号的传输方法， 其特征在于， 包括： 发送端根据本小区所受到的干扰强度， 和 /或相邻小区所受到的干扰强 度选择本小区待传输信号的复用方式； 所述发送端通知接收端所述本小区待传输信号的复用方式；
所述发送端按照所述本小区待传输信号的复用方式传输本小区待传输 信号。
2. 如权利要求 1所述的方法， 其特征在于， 所述根据本小区所受到的 干扰强度， 和 /或相邻小区所受到的干扰强度选择本小区待传输信号的复用 方式包括：
若本小区所受到的干扰强度， 和 /或相邻小区所受到的干扰强度大于或 等于第一阀值， 所述发送端选择码分复用 C画复用方式， 否则， 所述发送 端选择第二复用方式；所述第二复用方式为正交频分复用 OF画的复用方式， 或单载波频分复用 SC-F画 A的复用方式， 或频分复用 F画的复用方式， 或 时分复用 T画的复用方式。
3. 如权利要求 1、 2所述的方法， 其特征在于， 还包括为 C丽复用方 式传输的信号配置资源区域， 或与相邻小区协商为 C画复用方式传输的信 号配置资源区域。
4. 如权利要求 3所述的方法， 其特征在于， 所述为 C画复用方式传输 的信号配置资源区域， 或与相邻小区协商为 C丽复用方式传输的信号配置 资源区域包括以下的一种或多种组合： 所述发送端根据本小区上所受到的干扰分布， 和 /或本小区的传输性能 分布，和 /或本小区负载状况为所述 C画复用方式传输的信号配置资源区域； 所述发送端根据本小区及相邻小区所受到的干扰分布， 和 /或本小区及 相邻小区的传输性能分布， 和 /或本小区及相邻小区负载状况， 与相邻小区 协商为所述 c画复用方式传输的信号配置 C画资源区域；
所述发送端才艮据相邻小区的 PUCCH资源分配信息， 在本小区 PUSCH资 源与相邻小区 PUCCH资源的交叠资源上为所述 C画复用方式传输的信号配 置资源区域。
5. 如权利要求 1、 2 所述的方法， 其特征在于， 所述通知接收端所述 本小区待传输信号的复用方式包括：
所述发送端在物理下行控制信道 PDCCH上通知所述本小区待传输信号 的复用方式； 或
所述发送端根据 PDCCH 的循环冗余校验比特的不同加扰码字， 或所述 本小区待传输信号的资源区域的信息隐式通知所述本小区待传输信号的复 用方式； 或
所述发送端在无线资源控制 RRC信令上通知所述本小区待传输信号的 复用方式； 或
所述发送端通过 MCS字段通知所述本小区待传输信号的复用方式。
6. 如权利要求 1、 2所述的方法， 其特征在于， 还包括：
所述发送端为 C丽复用方式传输的信号配置扩频的码字， 或 所述发送端与相邻小区协商为 c画复用方式传输的信号配置扩频的码 字， 或
所述发送端与相邻小区协商为 c画复用方式传输的信号配置本小区及 相邻小区可用的码字资源。
7. 如权利要求 6所述的方法， 其特征在于， 还包括： 所述发送端通过配置的扩频码字的索引确定所述 C画复用方式传输的 PUSCH信道所对应的物理混合指示信道 PHICH信道索引。
8. 如权利要求 1、 2所述的方法， 其特征在于， 若选择 C画复用方式 传输本小区待传输信号， 所述按照 C丽复用方式传输本小区待传输信号包 括：
本小区和相邻小区按照所述 C丽复用方式联合扩频传输本小区待传输 信号。
9. 一种信号的传输方法， 其特征在于， 包括： 获取发送端传输的所述本小区待传输信号的复用方式；
按照所述本小区待传输信号的复用方式接收上述本小区待传输信号。
1 0. 如权利要求 9所述的方法， 其特征在于， 所述获取发送端传输的 所述本小区待传输信号的复用方式包括：
在物理下行控制信道 PDCCH上接收所述本小区待传输信号的复用方式； 或
根据 PDCCH 的循环冗余校验比特的不同加扰码字， 或所述本小区待传 输信号的资源区域的信息隐式获取所述本小区待传输信号的复用方式； 或 在无线资源控制 RRC信令上接收所述本小区待传输信号的复用方式； 或
通过 MCS字段获取所述本小区待传输信号的复用方式。
1 1. 一种信号的传输设备， 其特征在于， 包括：
选择模块， 用于根据本小区所受到的干扰强度， 和 /或相邻小区所受到 的干扰强度选择本'■!、区待传输信号的复用方式；
通知模块， 用于通知接收端所述本小区待传输信号的复用方式； 传输模块， 用于按照所述本小区待传输信号的复用方式传输本小区待 传输信号。
12. 如权利要求 1 1所述的设备， 其特征在于， 所述选择模块用于： 若本小区所受到的干扰强度， 和 /或相邻小区所受到的干扰强度大于或 等于第一阀值， 选择码分复用 C画复用方式， 否则， 选择第二复用方式。 所述第二复用方式为正交频分复用 OF丽 的复用方式， 或单载波频分复用 SC-F画 A的复用方式， 或频分复用 F画的复用方式， 或时分复用 ΠΜ的复用 方式。
1 3. 如权利要求 1 1、 12所述的设备， 其特征在于， 还包括配置模块， 用于为 C丽复用方式传输的信号配置资源区域， 或与相邻小区协商为 C丽 复用方式传输的信号配置资源区域。
14. 如权利要求 1 3所述的设备， 其特征在于， 所述配置模块用于： 根据本小区上所受到的干扰分布， 和 /或本小区的传输性能分布， 和 / 或本小区负载状况为所述 C画复用方式传输的信号配置资源区域； 和 /或 根据本小区及相邻小区所受到的干扰分布， 和 /或本小区及相邻小区的 传输性能分布， 和 /或本小区及相邻小区负载状况， 与相邻小区协商为所述 C画复用方式传输的信号配置 C画资源区域； 和 /或 才艮据相邻小区的 PUCCH资源分配信息， 在本小区 PUSCH资源与相邻小 区 PUCCH资源的交叠资源上为所述 C画复用方式传输的信号配置资源区域。
15. 如权利要求 1 1、 12所述的设备， 其特征在于， 所述通知模块用于： 在物理下行控制信道 PDCCH上通知所述本小区待传输信号的复用方式； 或
根据 PDCCH 的循环冗余校验比特的不同加扰码字， 或所述本小区待传 输信号的资源区域的信息隐式通知所述本小区待传输信号的复用方式； 或 在无线资源控制 RRC信令上通知所述本小区待传输信号的复用方式； 或
通过 MCS字段通知所述本小区待传输信号的复用方式。
16. 如权利要求 1 1、 12所述的设备， 其特征在于， 还包括: 码字配置模块， 用于为 c画复用方式传输的信号配置扩频的码字， 或 与相邻小区协商为 C画复用方式传输的信号配置扩频的码字， 或 与相邻小区协商为 C画复用方式传输的信号配置本小区及相邻小区可 用的码字资源。
17. 如权利要求 16所述的设备， 其特征在于， 还包括： 确定模块， 用于通过配置的扩频码字的索引确定所述 CDM复用方式传 输的 PUSCH信道所对应的物理混合指示信道 PHICH信道索引。
18. 如权利要求 11、 12所述的设备， 其特征在于， 若选择 C画复用方 式传输本小区待传输信号， 所述传输模块用于：
本小区和相邻小区按照所述 C丽复用方式联合扩频传输本小区待传输 信号。
19. 一种信号的传输设备， 其特征在于， 包括： 获取模块， 获取发送端传输的所述本小区待传输信号的复用方式； 接收模块， 按照所述本小区待传输信号的复用方式接收本小区待传输 信号。
20. 如权利要求 19所述的设备， 其特征在于， 所述获取模块用于： 在物理下行控制信道 PDCCH上接收所述本小区待传输信号的复用方式； 或
根据 PDCCH 的循环冗余校验比特的不同加扰码字， 或所述本小区待传 输信号的资源区域的信息隐式获取所述本小区待传输信号的复用方式； 或 在无线资源控制 RRC信令上接收所述本小区待传输信号的复用方式； 或
通过 MCS字段获取所述本小区待传输信号的复用方式。
21. —种信号的传输系统， 其特征在于， 包括： 如权利要求 11至 18任意一项所述的发送端； 如权利要求 19至 20任意一项所述的接收端。
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