WO2013010408A1 - Procédé et appareil de transmission de données de symbole phich - Google Patents

Procédé et appareil de transmission de données de symbole phich Download PDF

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Publication number
WO2013010408A1
WO2013010408A1 PCT/CN2012/076303 CN2012076303W WO2013010408A1 WO 2013010408 A1 WO2013010408 A1 WO 2013010408A1 CN 2012076303 W CN2012076303 W CN 2012076303W WO 2013010408 A1 WO2013010408 A1 WO 2013010408A1
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WO
WIPO (PCT)
Prior art keywords
phich
symbol data
network side
resource
receiving side
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PCT/CN2012/076303
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English (en)
Chinese (zh)
Inventor
郭森宝
孙云锋
戴博
陈艺戬
Original Assignee
中兴通讯股份有限公司
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Publication of WO2013010408A1 publication Critical patent/WO2013010408A1/fr

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Classifications

    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK

Definitions

  • the present invention relates to an information transmission technology of a Long Term Evolution Advanced System (LTE-Advanced) system, and more particularly to a method and device for transmitting physical physical hybrid retransmission request face indication channel (PHICH) symbol data in LTE-Advanced .
  • LTE-Advanced Long Term Evolution Advanced System
  • PHICH physical hybrid retransmission request face indication channel
  • a common reference signal (CRS, Common Reference Signal) is designed to measure the quality of the channel and demodulate the received data symbols.
  • the user equipment UE, User Equipment
  • the measurement of the quality channel is performed, thereby determining that the UE performs cell reselection and handover to the target cell.
  • the physical layer may disconnect through the high-level related radio link connection failure signaling.
  • LTE R10 in order to further improve the average spectrum utilization of the cell and the spectrum utilization of the cell edge and the throughput rate of each UE, two reference signals are respectively defined: a channel information reference signal (CSI-RS) and a demodulation reference signal (DMRS).
  • CSI-RS channel information reference signal
  • DMRS demodulation reference signal
  • the CSI-RS is used for the measurement of the channel.
  • the measurement of the CSI-RS can be used to calculate the Precoding Matrix Indicator (PMI) that the UE needs to feed back to the eNB.
  • PMI Precoding Matrix Indicator
  • CQI Channel Quality
  • RI rank indicator
  • DMRS is used for demodulation of the downlink shared channel.
  • the DMRS demodulation can reduce the interference between different receiving sides and different cells by using the beam method, and can reduce the performance degradation caused by the codebook granularity, and because the physical downlink control channel is not used.
  • the symbol overhead of the additional PMI reduces the overhead of downlink control signaling to a certain extent.
  • the physical downlink control channel (PDCCH) is mainly distributed in the first 1 or 2 or 3 orthogonal frequency division multiplexing (OFDM) symbols of one subframe, and the specific distribution needs to be according to different subframe types and
  • the number of ports of the CRS is configured as shown in Table 1, and Table 1 shows The number of downlink resource blocks configured according to different subframe types and the number of ports of the CRS (the number of OFDM symbols of the PDCCH of 10 and not more than 10).
  • Each receiving side needs to perform blind detection on the first three symbols of the downlink control information, and the starting position of the blind detection and the number of elements of the control channel are related to the temporary identification of the wireless network allocated to the receiving side and different control information.
  • the control information can generally be divided into public control information and proprietary control information.
  • the public control information is generally placed in the common search space of the physical downlink control channel, and the proprietary control information can be placed in the common search space and the dedicated search space.
  • the receiving side determines whether there is common control information, downlink scheduling, or uplink scheduling information in the current subframe. Since the downlink control information does not have a hybrid retransmission request ( HARQ ) feedback, it is necessary to ensure that the detected bit error rate is as low as possible.
  • HARQ hybrid retransmission request
  • the specific resource silence method may be divided into a subframe-based muting method, for example, an ABS method, a resource element-based method, and the resource element-based method such as CRS muting. method.
  • the resource quieting method not only increases the waste of resources, but also imposes a great limitation on scheduling. Especially when considering the ABS configuration of the Macro eNodeB, if the Pico is distributed more, the Macro eNodeB configures more ABSs. It will have a greater impact on the Macro eNodeB, which will increase resource waste and increase scheduling delay. Moreover, the control channel can reduce the interference of different control channel data resources under the ABS, but cannot solve the interference problem of the CRS resource and the data resource, and the method for the silent CRS cannot solve the interference between the data resources, and the method is backward compatible. Poor sex, while increasing access latency, may require more standardization efforts.
  • the LTE R11 phase more users may be introduced to transmit on the multicast multicast single frequency network (MBSFN) subframe, which will result in insufficient capacity of the PDCCH that the MBSFN can configure to carry 2 OFDM symbols, in order to guarantee the R8.
  • MBSFN multicast multicast single frequency network
  • the backward compatibility of R9 R10 users requires the development of new transmission control information resources on the Physical Downlink Shared Channel (PDSCH) resources, and the introduction of Multipoint Cooperative Transmission (COMP) technology in the R11 phase.
  • PDSCH Physical Downlink Shared Channel
  • the method of splitting solves the interference problem between different types of cells, and saves resource overhead, avoids waste of resources caused by silence, and reduces restrictions on scheduling.
  • the main object of the present invention is to provide a transmission side of PHICH symbol data.
  • the method and the device can expand the capacity of the PHICH resource, and avoid the problem that the PHICH resource is insufficient when the downlink control information is sent on the PDSCH resource.
  • a method for transmitting PHICH symbol data includes: the network side allocates PHICH resources for each receiving side in a frequency domain and/or a time domain PDSCH region; when the network side sends PHICH symbol data, Performing interleaving processing on the PHICH symbol data after transmitting the diversity precoding;
  • the network side maps the interleaved PHICH symbol data to the PHICH resource of each receiving side for transmission.
  • the network side allocates PHICH resources to each receiving side in the frequency domain and/or the time domain PDSCH area: the network side sets each receiving side by using radio resource control (RRC) signaling and/or PDCCH signaling.
  • RRC radio resource control
  • the PHICH resource notifies each receiving side of the number and/or location of resource blocks (RBs) in the frequency domain PDSCH region, and/or notifies each receiving side of the location occupied by the PHICH resources of each receiving side in the time domain PDSCH region.
  • the location occupied by the PDSCH region in the time domain is occupied by the first time slot or occupying the second time slot or occupying one subframe in the time domain PDSCH region.
  • the PDCCH signaling uses a Control Channel Element (CCE) as an allocation unit, and the network side places the PDCCH signaling into a last M CCEs of a PDCCH region, or the network side is configured according to a subframe number. And the radio frame number and the cell identity information allocate the CCE location of the PDCCH signaling in the PDCCH region.
  • CCE Control Channel Element
  • the network side when the network side transmits the PHICH symbol data, the network side performs interleaving processing on the PHICH symbol data after the transmit diversity precoding:
  • the network side When transmitting the PHICH symbol data, the network side allocates PHICH symbol data of the transmit diversity precoding to the PHICH resources of the receiving side by using a resource element group (REG) or an enhanced resource element group (eREG) as a basic unit, and the network PHICH will be on the different receiving side
  • the source is grouped.
  • Each PHICH group occupies 3 REGs or eREGs.
  • the same REG or eREG in the PHICH group is multiplexed by different PHICH resources in code division multiplexing (CDM) mode.
  • CDM code division multiplexing
  • the PHICH group is connected, and the PHICH symbol data of the PHICH resource allocated to each receiving side is added and combined according to the PHICH group, and the added PHICH symbol data is interleaved by using REG or eREG as an interleaving unit.
  • the method further includes:
  • the receiving side receives PHICH symbol data sent by the network side on the PHICH resource
  • the receiving side de-interleaves the received PHICH symbol data and performs de-interleaving processing to recover the PHICH symbol data after the transmit diversity pre-coding on the network side, and according to the recovered PHICH symbol data after the transmit diversity pre-coding on the network side. Obtain PHICH symbol data sent by the network side.
  • the PHICH symbol data sent by the receiving side to the PHICH resource on the receiving side is:
  • the receiving side determines whether the PHICH resource is in the frequency domain PDSCH region by using blind detection or receiving RRC signaling and/or PDCCH signaling sent by the network side.
  • the number and/or location of occupied RBs, and/or determining the location occupied by the PHICH resources in the time domain PDSCH region, according to the number and/or location of RBs occupied by the PHICH resources in the frequency domain PDSCH region, and/or the PHICH resources at the time receives PHICH symbol data.
  • the RRC signaling and/or PDCCH signaling sent by the blind detection network side is: the receiving side obtains the CCE location of the PDCCH region where the PDCCH signaling is located according to the subframe number, the radio frame number, and the cell identifier information. Performing blind detection on the CCE location to obtain the PDCCH signaling; or, receiving, by the receiving side, the last M CCEs of the blind detection PDCCH region to obtain the PDCCH signaling, where M is a non-negative integer.
  • the determining the number and/or location of the RBs occupied by the PHICH resource in the frequency domain PDSCH region is: the wireless network temporary identification identifier of the receiving side using the PHICH (PHICH-RNTI)
  • PHICH-RNTI the wireless network temporary identification identifier of the receiving side using the PHICH
  • a method for receiving PHICH symbol data includes: receiving, by a receiving side, PHICH symbol data sent by a network side at a PHICH resource;
  • the receiving side performs de-interleaving on the received PHICH symbol data, and recovers the PHICH symbol data after the transmit diversity pre-coding on the network side, according to the recovered PHICH after the transmit diversity pre-coding on the network side.
  • Symbol data is sent by the network side
  • the PHICH symbol data sent by the receiving side to the PHICH resource on the receiving side is:
  • the receiving side determines whether the PHICH resource is in the frequency domain PDSCH region by using blind detection or receiving RRC signaling and/or PDCCH signaling sent by the network side.
  • the number and/or location of occupied RBs, and/or determining the location occupied by the PHICH resources in the time domain PDSCH region, according to the number and/or location of RBs occupied by the PHICH resources in the frequency domain PDSCH region, and/or the PHICH resources at the time receives PHICH symbol data.
  • the network side of the present invention provides a network side for transmitting PHICH symbol data, where the network side includes: a distribution unit, a PHICH processing unit, and a sending unit;
  • An allocation unit configured to allocate PHICH resources for each receiving side in a frequency domain and/or a time domain PDSCH region
  • a PHICH processing unit configured to perform interleaving processing on the PHICH symbol data that has been subjected to transmit diversity precoding when transmitting PHICH symbol data;
  • a sending unit configured to map the interleaved PHICH symbol data to the PHICH resource of each receiving side for transmission.
  • the allocating unit is specifically configured to notify, by using RRC signaling and/or PDCCH signaling, the number and/or location of the PHICH resources of each receiving side in the frequency domain PDSCH area to each receiving side, and/or Or the PHICH resources of each receiving side are occupied in the time domain PDSCH area. The location is notified to each receiving side.
  • the present invention provides a receiving side that receives PHICH symbol data, and the receiving side includes: a receiving unit and a data recovery unit;
  • a receiving unit configured to receive PHICH symbol data sent by the network side in the PHICH resource
  • a data recovery unit configured to perform de-interleaving processing on the received PHICH symbol data, and recover the pre-coded pre-coded by the network side
  • the PHICH symbol data obtains PHICH symbol data transmitted by the network side according to the recovered PHICH symbol data that is subjected to transmit diversity precoding on the network side.
  • the receiving unit is specifically configured to determine the number and/or location of RBs occupied by the PHICH resource in the frequency domain PDSCH region by using blind signaling or receiving RRC signaling and/or PDCCH signaling sent by the network side. / or determining the location occupied by the PHICH resource in the time domain PDSCH region, receiving PHICH symbol data according to the number and/or location of the RBs occupied by the PHICH resource in the frequency domain PDSCH region, and/or the location occupied by the PHICH resource in the time domain PDSCH region.
  • the present invention provides a method and apparatus for transmitting PHICH symbol data.
  • the network side allocates PHICH resources for each receiving side in the frequency domain and/or time domain PDSCH region; when the network side transmits PHICH symbol data, it will undergo transmit diversity pre-
  • the encoded PHICH symbol data is interleaved; the network side maps the interleaved PHICH symbol data to the PHICH resource of each receiving side for transmission; thus, the capacity of the PHICH resource can be expanded to avoid transmitting downlink control information on the PDSCH resource.
  • PHICH resources are not enough.
  • FIG. 1 is a schematic flowchart of a method for transmitting PHICH symbol data according to the present invention
  • FIG. 2 is a schematic diagram of a position of a PHSR symbol data transmitted in a first time slot of a normal cyclic prefix in a time domain PDSCH region according to the present invention
  • 3 is a schematic diagram of a location of a first subframe in which a normal cyclic prefix of a PHSCH region of the present invention is transmitted in a time domain PDSCH region;
  • 4 is a schematic diagram of a position where a PHICH symbol data of the present invention is transmitted in a second time slot of a normal cyclic prefix of a time domain PDSCH region;
  • FIG. 5 is a schematic diagram of a location where PHICH symbol data of the present invention is transmitted in a first time slot of an extended cyclic prefix of a time domain PDSCH region;
  • FIG. 6 is a schematic diagram of a location of transmission of PHICH symbol data in a first subframe of an extended cyclic prefix of a time domain PDSCH region according to the present invention
  • FIG. 7 is a schematic diagram of a location of PHICH symbol data transmitted in a second time slot of an extended cyclic prefix of a time domain PDSCH region according to the present invention.
  • FIG. 8 is a schematic flowchart of a method for receiving PHICH symbol data according to the present invention
  • FIG. 9 is a schematic structural diagram of a network side for transmitting PHICH symbol data according to the present invention
  • FIG. 10 is a schematic diagram of receiving PHICH symbol data according to the present invention. Schematic diagram of the structure on the receiving side. detailed description
  • the basic idea of the present invention is: the network side allocates PHICH resources for each receiving side in the frequency domain and/or the time domain PDSCH region; when the network side transmits the PHICH symbol data, the PHICH symbol data after the transmit diversity precoding is interleaved. Processing: The network side maps the interleaved PHICH symbol data to the PHICH resource of each receiving side for transmission.
  • the present invention implements a method for transmitting PHICH symbol data. As shown in FIG. 1, the method includes the following steps:
  • Step 101 The network side allocates PHICH resources to each receiving side in the frequency domain and/or the time domain PDSCH area.
  • the network side notifies, by the RRC signaling and/or the PDCCH signaling, the number and/or location of the PHICH resources in the frequency domain PDSCH area to the receiving side, and/or the receiving side.
  • the location where the PHICH resource is occupied in the time domain PDSCH region is notified to each receiving side; the location occupied by the time domain PDSCH region may be the first in the time domain PDSCH region.
  • the time slot either occupies the second time slot or occupies one subframe.
  • the PDCCH signaling may be a CCE as an allocation unit, and the network side may place the PDCCH signaling into the last CCEs of the PDCCH area, or the network side allocates the according to the subframe number, the radio frame number, and the cell identifier information.
  • the PDCCH signaling is at the CCE location of the PDCCH region.
  • Step 102 When transmitting PHICH symbol data, the network side performs interleaving processing on the PHICH symbol data that has been subjected to transmit diversity precoding.
  • the PHICH symbol data that is pre-coded by the transmit diversity is allocated to the PHICH resource of each receiving side by using the REG or the eREG as a basic unit, that is, each PHICH resource occupies 3 REGs or eREG, the network side groups the PHICH resources of different receiving sides, each PHICH group occupies 3 REGs or eREGs, and the same REG or eREG in the PHICH group is multiplexed by different PHICH resources in CDM mode, and the network side follows the PHICH group.
  • the PHICH symbol data of the PHICH resource allocated to each receiving side is added and combined according to the PHICH group, that is, the PHICH symbol data of the same PHICH group is added and combined, and the sum is added.
  • the combined PHICH symbol data is interleaved by using an REG or eREG as an interleaving unit, where the REG or eREG is four modulation symbols after the PHICH symbol data is subjected to transmit diversity precoding.
  • the step further includes: when transmitting the PHICH symbol data, the network side copies the PHICH symbol data sent to each receiving side three times, performs BPSK modulation on each PHICH symbol data, and scrambles and expands the modulated PHICH symbol data.
  • Frequency processing wherein, in the spread spectrum processing, for a normal cyclic prefix and an extended cyclic prefix, a spreading code of a different length or a spreading code of the same length may be used, and the ordinary cyclic prefix may use a spreading factor of 4 times.
  • the extended cyclic prefix may be spread by 2 times.
  • each PHICH symbol data after the spread spectrum needs to be complemented by zero to form four PHICH symbol data.
  • the OFDM symbol occupied by the PDCCH is indicated by a slanted box, and the grid box represents the OFDM symbol occupied by the PHICH symbol data.
  • the PHICH symbol data occupies four OFDM symbols of the PDSCH region; when the PHICH symbol data is transmitted in the first subframe of the normal cyclic prefix of the time domain PDSCH region, as shown in FIG. 3 As shown, after the PDCCH occupies the first three OFDM symbols, the PHICH symbol data occupies all OFDM symbols of the PDSCH region;
  • the PHICH symbol data When the PHICH symbol data is transmitted in the first time slot of the extended cyclic prefix of the time domain PDSCH region, as shown in FIG. 5, after the first three OFDM symbols are occupied by the PDCCH, the PHICH symbol data occupies three OFDM symbols of the PDSCH region;
  • the PHICH symbol data When the PHICH symbol data is transmitted in the first subframe of the extended cyclic prefix of the time domain PDSCH region, as shown in FIG. 6, after the first three OFDM symbols are occupied by the PDCCH, the PHICH symbol data occupies all the OFDM symbols of the PDSCH region;
  • the PHICH symbol data is transmitted in the second slot of the extended cyclic prefix of the time domain PDSCH region, as shown in FIG. 7, after the PDCCH occupies the first three OFDM symbols of the first slot of the extended cyclic prefix, the PHICH symbol data is occupied. All OFDM symbols of the PDSCH region of the second slot of the cyclic prefix are extended.
  • Step 103 The network side maps the interlaced PHICH symbol data to the PHICH resource of each receiving side for transmission.
  • the network side maps the interlaced PHICH symbol data to the PHICH resource of each receiving side according to the mapping order of the pre-frequency domain and the time domain.
  • the above method further includes a method for receiving PHICH symbol data. As shown in FIG. 8, the method includes the following steps:
  • Step 201 The receiving side receives the PHICH symbol data sent by the network side on the PHICH resource. Specifically, the receiving side determines whether the PHICH resource is occupied in the frequency domain PDSCH region by using blind detection or receiving RRC signaling and/or PDCCH signaling sent by the network side. Number and/or location of RBs, and/or determining the location of PHICH resources occupied in the time domain PDSCH region, the number and/or location of RBs occupied in the frequency domain PDSCH region according to PHICH resources, and/or PHICH resources in the time domain The location occupied by the PDSCH region receives PHICH symbol data.
  • the receiving side may obtain the CCE location of the PDCCH region where the PDCCH signaling is located according to the subframe number, the radio frame number, and the cell identifier information, and perform blind detection on the CCE location to obtain the PDCCH signaling; or, the receiving side The last M CCEs of the PDCCH region are fixedly blinded to obtain the PDCCH signaling.
  • the receiving side may use the PHICH-RNTI to perform blind detection on the reserved RB, and determine the number and/or location of the RBs occupied by the PHICH resource in the frequency domain PDSCH region, where the PHICH-RNTI may utilize the unused RNTI in the R10.
  • Step 202 The receiving side performs de-interleaving on the received PHICH symbol data, and recovers the PHICH symbol data after the transmit diversity pre-coding on the network side, according to the recovered network-side transmit diversity pre-coded.
  • the PHICH symbol data obtains PHICH symbol data sent by the network side;
  • the receiving side demaps the received PHICH symbol data to obtain a precoding modulation symbol sequence, and performs deinterleaving on the obtained precoding modulation symbol sequence according to REG or eREG, and restores the sequence according to the PHICH group.
  • the transmit diversity pre-coded PHICH symbol data is obtained according to the PHICH resource number and/or location, the pilot sequence index, the subframe type, the PHICH group number, and the length of the spreading code used by the PHICH resource to obtain transmit diversity precoding.
  • the PHICH group index and the PHICH group index where the PHICH symbol data is located According to the PHICH group index and the PHICH group index, corresponding data extraction, diversity reception, and multi-antenna detection processing are performed to obtain PHICH symbol data transmitted by the network side.
  • the present invention further provides a network side for transmitting PHICH symbol data.
  • the network side includes: an allocating unit 31, a PHICH processing unit 32, and a sending unit 33;
  • An allocating unit 31 configured to allocate a PHICH resource for each receiving side in a frequency domain and/or a time domain PDSCH region;
  • the PHICH processing unit 32 is configured to perform interleaving processing on the PHICH symbol data that has undergone the transmit diversity precoding when the PHICH symbol data is sent;
  • the sending unit 33 is configured to map the interleaved PHICH symbol data to the PHICH resource of each receiving side for transmission.
  • the allocating unit 31 is configured to notify, by using RRC signaling and/or PDCCH signaling, the number and/or location of the PHICH resources of each receiving side in the frequency domain PDSCH area to each receiving side, and/or each The PHICH resource on the receiving side is notified to each receiving side at the location occupied by the time domain PDSCH region.
  • the PHICH processing unit 32 is specifically configured to allocate, by using the REG or the eREG as a basic unit, the PHICH symbol data that has been subjected to the transmit diversity precoding to the PHICH resource of each receiving side, and group the PHICH resources of different receiving sides.
  • the PHICH group occupies 3 REGs or eREGs.
  • the same REG or eREG in the PHICH group is multiplexed by different PHICH resources in CDM mode.
  • Different PHICH groups are connected according to the PHICH group order, and are allocated to each receiving side.
  • the PHICH symbol data of the PHICH resource is added and combined according to the PHICH group, and the added and combined PHICH symbol data is interleaved by using REG or eREG as an interleaving unit.
  • the PHICH processing unit 32 is further configured to copy PHICH symbol data sent to each receiving side three times, perform BPSK modulation on each PHICH symbol data, and modulate the modulated
  • the PHICH symbol data is subjected to scrambling and spreading processing, and performs layer mapping and transmission diversity precoding on the scrambled and spread-processed PHICH symbol data.
  • the present invention further provides a receiving side that receives PHICH symbol data.
  • the receiving side includes: a receiving unit 41 and a data restoring unit 42.
  • the receiving unit 41 is configured to receive the network side.
  • the data recovery unit 42 is configured to perform de-interleaving on the received PHICH symbol data, and recover the PHICH symbol data after the transmit diversity pre-coding on the network side, according to the recovered
  • the PHICH symbol data sent by the network side is obtained by transmitting the diversity precoded PHICH symbol data on the network side.
  • the receiving unit 41 is specifically configured to determine the number and/or location of the RBs occupied by the PHICH resources in the frequency domain PDSCH region by using blind detection or receiving RRC signaling and/or PDCCH signaling sent by the network side, and/or determining The PHICH resource is occupied by the time domain PDSCH region, and receives PHICH symbol data according to the number and/or location of the RBs occupied by the PHICH resource in the frequency domain PDSCH region, and/or the PHICH resource occupied at the time domain PDSCH region.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the network side of the present embodiment notifies the PHICH resources of each receiving side of the number and/or location of the occupied RBs in the frequency domain PDSCH area to each receiving side through RRC signaling, and/or the PHICH resources of each receiving side are in the time domain PDSCH.
  • the location occupied by the area is notified to each receiving side.
  • the network side transmits the PHICH symbol data
  • the network side copies the PHICH symbol data sent to each receiving side three times, performs BPSK modulation on each PHICH symbol data, and modulates the PHICH.
  • the symbol data is subjected to scrambling and spreading processing, wherein, in the spread spectrum processing, 4 times spread spectrum can be used for the normal cyclic prefix and the normal cyclic prefix, and the extended cyclic prefix can use 2 times spread spectrum, when extended When the cyclic prefix uses 2 times spread spectrum, the number of every two PHICH symbols after spreading According to the need of zero-padding processing, four PHICH symbol data are complemented, and the PHICH symbol data after scrambling and spreading processing is subjected to layer mapping and transmit diversity precoding, and the PHICH symbol data of each antenna port pre-coded by the transmit diversity is transmitted.
  • the PHICH resource is allocated to each receiving side by using the REG or eREG as the basic unit, and the PHICH resources of different receiving sides are grouped by the network side.
  • Each PHICH group occupies 3 REGs or eREGs, and the same REG or eREG in the PHICH group is different.
  • the PHICH resources are multiplexed in a CDM manner, and the network side is connected according to the PHICH group's sequence of 4 different PHICH groups, and the PHICH symbol data allocated to the PHICH resources of each receiving side is added and combined according to the PHICH group, that is, The PHICH symbol data of the same PHICH group is added and combined; the network side adds the combined PHICH symbol data to the interleaving unit by using the REG or the eREG as an interleaving unit, where the REG or the eREG is the PHICH symbol data and is subjected to the transmit diversity pre-
  • the encoded four modulation symbols, that is, every four precoded modulation symbols are one interleaving unit, and transmit diversity precoding on one antenna port
  • the PHICH symbol data may be divided into a plurality of interleaving units, and the interleaving processing is performed on the multiple interleaving units; the network side maps the interleaved PHICH symbol data to each
  • the receiving side of the present embodiment determines, by using the RRC signaling sent by the blind detection network side, the number and/or location of the RBs occupied by the PHICH resource in the frequency domain PDSCH region, and/or determines the location occupied by the PHICH resource in the time domain PDSCH region.
  • the receiving side demaps the received PHICH symbol data to obtain precoding a sequence of modulation symbols, deinterleaving the obtained precoding modulation symbol sequence according to REG or eREG as an interleaving unit, and recovering PHICH symbol data after transmission diversity precoding according to the order of the PHICH group, according to the number of PHICH resources and/or Or the location, the pilot sequence index, the subframe type, the number of PHICH groups, and the length of the spreading code used by the PHICH resource, and obtain the PHICH group index and PHICH where the PHICH symbol data after the transmit diversity precoding is obtained.
  • the intra-group index is obtained by performing corresponding data extraction, diversity reception, and multi-antenna detection processing according to the PHICH group index and the PHICH group index,
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the network side of the present embodiment notifies the receiving side of the number and location of the RBs reserved by the PHICH resources of the receiving side in the frequency domain PDSCH area by using RRC signaling; the network side sends each PHICH symbol data to each receiving side.
  • the PHICH symbol data on the receiving side is copied three times, BPSK modulation is performed on each PHICH symbol data, and the modulated PHICH symbol data is scrambled and spread-processed, wherein, in the spread spectrum processing, for the normal cyclic prefix and the extended cyclic prefix
  • the spreading code of different lengths may be used or the spreading code of the same length may be used.
  • the common cyclic prefix may use 4 times spread spectrum
  • the extended cyclic prefix may use 2 times spread spectrum, when the extended cyclic prefix is used.
  • each PHICH symbol data after the spread spectrum needs to be complemented by zeros to complement the four PHICH symbol data, and the layered and transmitted diversity of the PHICH symbol data after scrambling and spreading processing is performed.
  • the PHICH symbol data of each antenna port pre-coded by the transmit diversity is allocated to the PHICH resource of each receiving side as a basic unit of REG or eREG, the network
  • the PHICH resources of different receiving sides are grouped. Each PHICH group occupies 3 REGs or eREGs.
  • the same REG or eREG in the PHICH group is multiplexed by different PHICH resources in CDM mode.
  • the network side is different according to the PHICH group order.
  • the PHICH group is connected, and the PHICH symbol data of the PHICH resource allocated to each receiving side is added and combined according to the PHICH group, that is, the PHICH symbol data of the same PHICH group is added and combined; the network side will be added and combined.
  • the PHICH symbol data is interleaved by using an REG or an eREG as an interleaving unit, where the REG or the eREG is four modulation symbols after the PHICH symbol data is subjected to transmit diversity precoding, that is, every four precoded modulation symbols are one interlace.
  • the unit, the transmit diversity pre-coded PHICH symbol data on one antenna port may be divided into multiple interleaving units, and the multiple interleaving units are interleaved; the network side interleaves the processed data.
  • the PHICH symbol data is mapped to the PHICH resource of each receiving side according to the mapping order of the pre-frequency domain and the time domain.
  • the receiving side of the present embodiment determines the number and location of the RBs reserved by the PHICH resource in the frequency domain PDSCH region by using the RRC signaling sent by the blind detection network side, and the number and location of the RBs reserved in the frequency domain PDSCH region according to the PHICH resource.
  • the number and location of RBs is the number and location of RBs.
  • the receiving side demaps the received PHICH symbol data to obtain a precoding modulation symbol sequence, and performs deinterleaving on the obtained precoding modulation symbol sequence according to REG or eREG, and recovers the transmission diversity arranged in the order of the PHICH group.
  • the pre-coded PHICH symbol data is obtained according to the PHICH resource number and location, the pilot sequence index, the subframe type, the PHICH group number, and the length of the spreading code used by the PHICH resource to obtain the PHICH symbol data after the transmit diversity precoding.
  • the PHICH group index and the PHICH group index are respectively subjected to corresponding data extraction, diversity reception, and multi-antenna detection processing according to the PHICH group index and the PHICH group index, and the PHICH symbol data transmitted by the network side is obtained.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the network side of the present embodiment notifies the PHICH resource of each receiving side of the number and/or location of the occupied RBs in the frequency domain PDSCH area to each receiving side by using PDCCH signaling, and/or the PHICH resources of each receiving side are in the time domain PDSCH.
  • the location of the area is notified to each receiving side; the PDCCH signaling may be a CCE as an allocation unit, and the network side may place the PDCCH signaling into the last M (M>1) CCEs of the PDCCH area, or the network side.
  • the frequency code the common cyclic prefix may use 4 times spread spectrum
  • the extended cyclic prefix may use 2 times spread spectrum
  • each of the two PHICH symbols after spreading The data needs to be complemented by zeros to complement the four PHICH symbol data, and the PHICH symbol data after scrambling and spreading processing is subjected to layer mapping and transmit diversity precoding, and the PHICH symbol data of each antenna port precoded by the transmit diversity is transmitted.
  • the PHICH resource is allocated to each receiving side by using the REG or eREG as the basic unit.
  • the network side groups the PHICH resources of different receiving sides. Each PHICH group occupies 3 REGs or eREGs, and the same REG or eREG in the PHICH group is different.
  • the PHICH resources are multiplexed in a CDM manner, and the network side is connected according to the PHICH group's sequence of 4 different PHICH groups, and the PHICH symbol data allocated to the PHICH resources of each receiving side is added and combined according to the PHICH group, that is, The PHICH symbol data of the same PHICH group is added and combined; the network side adds the combined PHICH symbol data to the interleaving unit by using REG or eREG as an interleaving unit, where The REG or the eREG is four modulation symbols after the PHICH symbol data is subjected to transmit diversity precoding, that is, every four precoded modulation symbols are one interleaving unit, and the transmit diversity precoded PHICH symbol data on one antenna port may be
  • the method is divided into a plurality of interleaving units, and the interleaving processing is performed on the plurality of interleaving units.
  • the network side maps the interleaved PHICH symbol data to the
  • the receiving side of the present embodiment obtains the CCE location of the PDCCH region where the PDCCH signaling is located by blindly detecting the last M CCEs of the PDCCH region or according to the subframe number, the radio frame number, and the cell identifier information, and performs blind detection at the CCE location.
  • the number and/or location of the RBs occupied by the area, and/or the PHICH resource receives the PHICH symbol data at the location occupied by the time domain PDSCH area; the PHICH symbol to be received by the receiving side No.
  • the data is demapped to obtain a precoding modulation symbol sequence, and the obtained precoding modulation symbol sequence is deinterleaved according to REG or eREG as an interleaving unit, and the PHICH symbol pre-coded by the transmit diversity pre-arranged in the order of the PHICH group is recovered.
  • Data according to the PHICH resource number and/or location, the pilot sequence index, the subframe type, the PHICH group number, and the length of the spreading code used by the PHICH resource, obtain the PHICH group index of the PHICH symbol data after the transmit diversity precoding.
  • the PHICH group index according to the PHICH group index and the PHICH group index to perform corresponding data extraction, diversity reception, and multi-antenna detection processing, and the PHICH symbol data sent by the network side is obtained.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the network side of the present embodiment notifies the receiving side of the number and location of the RBs reserved by the PHICH resources of the receiving side in the frequency domain PDSCH area by using the PDCCH signaling; the PDCCH signaling may use CCE as an allocation unit, and the network side
  • the PDCCH signaling may be placed in the last M (M>1) CCEs of the PDCCH region, or the network side allocates the CCE location of the PDCCH signaling in the PDCCH region according to the subframe number, the radio frame number, and the cell identity information.
  • the network side When the network side transmits the PHICH symbol data, the network side copies the PHICH symbol data sent to each receiving side three times, performs BPS modulation on each PHICH symbol data, and performs scrambling and spreading processing on the modulated PHICH symbol data.
  • the normal cyclic prefix may use 4 times spread spectrum for the normal cyclic prefix
  • the extended cyclic prefix may use 2 times spread spectrum, when the extended cyclic prefix adopts the 2 times spread spectrum method.
  • PHICH symbol data after the spread spectrum For each of the two PHICH symbol data after the spread spectrum, zero PHICH symbol data is required to be complemented, and the PHICH symbol data after scrambling and spreading processing is layer mapped and The diversity precoding is performed, and the PHICH symbol data of each antenna port pre-coded by the transmit diversity is allocated to the PHICH resource of each receiving side in units of REG or eREG, and the network side groups the PHICH resources of different receiving sides.
  • PHICH groups occupy 3 REGs or eREGs, and the same REG or eREG in the PHICH group is Different PHICH resources are multiplexed in the CDM mode, and the network side connects according to the PHICH group's sequence of 4 different PHICH groups, and the PHICH symbol data allocated to the PHICH resources of each receiving side is added and combined according to the PHICH group. That is, the PHICH symbol data of the same PHICH group is added and combined; the network side adds the combined PHICH symbol data to the interleaving unit by using REG or eREG as an interleaving unit, where the REG or eREG is PHICH symbol data through transmit diversity.
  • the pre-coded four modulation symbols that is, every four pre-coded modulation symbols are one interleaving unit, and the transmit diversity pre-coded PHICH symbol data on one antenna port may be divided into multiple interleaving units, for the multiple The interleaving unit performs interleaving processing; the network side transmits the PHICH resource on the opposite side.
  • the receiving side of the present embodiment obtains the CCE location of the PDCCH region where the PDCCH signaling is located by blindly detecting the last M CCEs of the PDCCH region or according to the subframe number, the radio frame number, and the cell identifier information, and performs blind detection at the CCE location.
  • the PDCCH signaling determining, according to the PDCCH signaling, the number and location of the RBs reserved by the PHICH resource in the frequency domain PDSCH region, and receiving the PHICH symbol data according to the number and location of the RBs occupied by the PHICH resource in the frequency domain PDSCH region;
  • the receiving side performs blind detection from the low frequency RB to the high frequency RB by using the PHICH-RNTI according to the reserved RB number and location notified by the PDCCH signaling, and determines the number and location of the RB reserved by the PHICH resource in the frequency domain PDSCH region.
  • the receiving side demaps the received PHICH symbol data to obtain a precoding modulation symbol sequence, and performs deinterleaving on the obtained precoding modulation symbol sequence according to REG or eREG, and recovers the transmission diversity arranged in the order of the PHICH group.
  • the pre-coded PHICH symbol data is obtained according to the PHICH resource number and location, the pilot sequence index, the subframe type, the PHICH group number, and the length of the spreading code used by the PHICH resource to obtain the PHICH symbol data after the transmit diversity precoding.
  • the PHICH group index and the PHICH group index are respectively subjected to corresponding data extraction, diversity reception, and multi-antenna detection processing according to the PHICH group index and the PHICH group index, and the network side transmission is obtained.
  • PHICH symbol data is obtained.
  • the present invention amplifies the capacity of the PHICH resource by performing interleaving processing on the PHICH symbol data pre-coded by the transmit diversity, and avoids the problem that the PHICH resource is insufficient when the downlink control information is transmitted on the PDSCH resource.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé de transmission de données de symbole de canal d'indicateur HARQ physique (PHICH). Le côté réseau attribue la ressource PHICH pour chaque côté réception dans la zone de canal partagé de liaison descendante physique (PDSCH) dans le domaine fréquentiel et/ou le domaine temporel, met en œuvre l'entrelacement des données de symbole PHICH après qu'elles ont été soumises à un pré-codage de diversité d'émission lorsque le côté réseau transmet les données de symbole PHICH, et mappe les données de symbole PHICH entrelacées à la ressource PHICH de chaque côté réception afin de les transmettre. Un procédé de réception des données de symbole PHICH, le côté réseau et le côté réception sont également décrits selon l'invention. La capacité de ressource PHICH peut être étendue, ce qui évite le problème d'insuffisance de ressource PHICH disponible durant la transmission des informations de commande de liaison descendante dans la ressource PDSCH.
PCT/CN2012/076303 2011-07-20 2012-05-30 Procédé et appareil de transmission de données de symbole phich WO2013010408A1 (fr)

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