WO2011029386A1 - Procédé adapté pour indiquer une allocation de ressources d'une liaison relais, et procédé et dispositif adaptés pour obtenir des informations d'allocation de ressources - Google Patents

Procédé adapté pour indiquer une allocation de ressources d'une liaison relais, et procédé et dispositif adaptés pour obtenir des informations d'allocation de ressources Download PDF

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Publication number
WO2011029386A1
WO2011029386A1 PCT/CN2010/076708 CN2010076708W WO2011029386A1 WO 2011029386 A1 WO2011029386 A1 WO 2011029386A1 CN 2010076708 W CN2010076708 W CN 2010076708W WO 2011029386 A1 WO2011029386 A1 WO 2011029386A1
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WO
WIPO (PCT)
Prior art keywords
pdcch
pdsch
symbols occupied
ofdm symbol
ofdm symbols
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PCT/CN2010/076708
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English (en)
Chinese (zh)
Inventor
李晏
龚政委
孙晓婷
尚政
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华为技术有限公司
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Publication of WO2011029386A1 publication Critical patent/WO2011029386A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • Resource allocation indication method of relay link, method and device for obtaining distribution information The application is submitted to the Chinese Patent Office on September 10, 2009, and the application number is 200910174724. 7.
  • the invention name is "resource allocation indication of the relay link"
  • the priority of the method, the method and the device for obtaining the information is disclosed in the Chinese Patent Application, the entire contents of which are incorporated herein by reference.
  • IP Internet Protocol
  • eNB evolved Node B
  • the relay technology is to set a relay node (RN) between the eNB and the user terminal, so that the RN transmits the signal sent by the eNB to a further user equipment (UE), and sends a signal sent by the farther UE to the UE.
  • RN relay node
  • the eNB, the RN, and the UE form a relay network.
  • a link between an eNB and an RN is called a relay link or a backhaul link
  • a link between the RN and the UE is called an access link
  • a link between the eNB and the UE is called a link.
  • Direct link In the cell to which the RN is attached, the trunk is divided into an in-band relay and an out-of-band relay according to whether the link between the network side to the RN and the network side to the UE share the same frequency band resource.
  • the resource allocation method of the downlink relay link is as shown in FIG. 1 , and different frequency band resources are allocated to different RNs, and within the frequency band resources of each RN, the relay link control channel and the medium are There are three ways to allocate resources along the link data channel: time division multiplexing (TDM), frequency division multiplexing (FDM), and TDM/FDM mixing.
  • TDM time division multiplexing
  • FDM frequency division multiplexing
  • TDM/FDM mixing TDM/FDM mixing
  • the embodiment of the invention provides a resource allocation indication method for a relay link, and a method and device for obtaining allocation information.
  • An embodiment of the present invention provides a resource allocation indication method for a relay link, including:
  • the embodiment of the invention further provides a method for obtaining shared channel resource allocation information, including:
  • the embodiment of the invention further provides a base station, including:
  • a sending module configured to send the start OFDM symbol position information of the R-PDSCH to each relay node; or send the number of OFDM symbols occupied by the R-PDCCH and the number of OFDM symbols occupied by the PDCCH of the base station to the UE to each a relay node, such that each of the relay nodes determines a starting OFDM symbol position of the R-PDSCH.
  • the embodiment of the invention further provides a relay node device, including:
  • a receiving module configured to receive initial OFDM symbol position information of the R-PDSCH, or receive the number of OFDM symbols occupied by the R-PDCCH and the number of OFDM symbols occupied by the PDCCH of the base station to the UE;
  • a start symbol obtaining module configured to learn, according to the starting OFDM symbol position information of the R-PDSCH, a starting OFDM symbol position of the R-PDSCH, or according to the OFDM symbol number occupied by the R-PDCCH and a base station to The number of OFDM symbols occupied by the PDCCH of the UE obtains the starting OFDM symbol position of the R-PDSCH.
  • the RN is informed of the number of OFDM symbols occupied by the R-PDCCH and the number of OFDM symbols occupied by the PDCCH of the base station to the UE, so that the RN can learn the resource allocation information of the eNB side, thereby correctly receiving the data in the R-PDSCH.
  • FIG. 2 is a flowchart of a resource allocation indication method for a relay link according to an embodiment of the present invention
  • FIG. 3B is a schematic diagram of another centralized resource mapping of a downlink relay link control channel in a resource allocation indication method for a relay link according to an embodiment of the present invention
  • 3C is a schematic diagram of distributed resource mapping of a downlink relay link control channel in a resource allocation indication method of a relay link according to an embodiment of the present invention
  • FIG. 4 is a flowchart of another resource allocation indication method for a relay link according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a method for obtaining shared channel resource allocation information according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a relay node apparatus according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of another relay node device according to an embodiment of the present invention. detailed description
  • the R-PDSCH can be determined according to the number of OFDM symbols occupied by the Physical Downlink Control Channel (PDCCH) and the Relay Link Physical Downl Control Channel (R-PDCCH).
  • An initial OFDM symbol the starting OFDM symbol of the R-PDSCH is located before or after the OFDM symbol occupied by the R-PDCCH; the initial OFDM symbol of the R-PDCCH is fixed;
  • the above steps 21 and 22 can be performed by a base station such as an eNB.
  • the start position of the R-PDCCH is fixed after the symbol occupied by the PDCCH, in order to avoid the transmission and reception switching to the relay link physical control format indicator channel (R_PCFICH),
  • the downlink relay link control channel such as the relay link physical hybrid-ARQ indicator channel (R_PHICH) and the R-PDCCH, affects the downlink relay link control channel, and downlinks the R_PCFICH, R-PHICH, and R-PDCCH.
  • the link control channel is sent as far as possible on the symbol resource after the RN completes the transceiving conversion.
  • the symbol resource after the RN completes transceiving and transforming does not include symbol resources for transceiving and translating.
  • the control channel start symbol of the RN may be placed.
  • the downlink relay link control channel must be placed on the symbol resource after the PDCCH of the direct link, and the number of PDCCHs of the direct link varies with the system bandwidth, it can occupy up to 3 and 4 symbol resources respectively.
  • the R-PDSCH may be required by the eNB according to various control channels including the relay link and the direct link in the relay subframe. The number of OFDM symbols occupied, dynamically determined
  • the starting symbol of R-PDSCH effectively improves resource utilization.
  • the eNB determines the start symbol position of the R-PDSCH resource mapping according to the OFDM symbol number PDCCH occupied by the control channel PDCCH of the UE covered by the eNB, and according to the number of OFDM symbols N R- H occupied by the control channel R-PDCCH to the RN. . Specifically, the eNB removes the OFDM symbol position occupied by the PDCCH transmitted to the lower UE and the R-PDCCH transmitted to the RN, and allocates the OFDM symbol that the RN considers to be the earliest to start receiving to the R-PDSCH, that is, allocates resources for the R-PDSCH. .
  • FIG. 3A is a schematic diagram of centralized resource mapping of a downlink relay link control channel in a resource allocation indication method of a relay link according to an embodiment of the present invention.
  • all R-PDSCHs are within the range of the relay control channel band.
  • Figure 3B is a Another centralized resource mapping diagram of the downlink relay link control channel in the resource allocation indication method of the relay link provided by the embodiment.
  • Figure 3B some R-PDSCHs are outside the range of the relay control channel band.
  • FIG. 3C is a schematic diagram of distributed resource mapping of a downlink relay link control channel in a resource allocation indication method of a relay link according to an embodiment of the present invention.
  • 31 is the PCFICH, PHICH, and PDCCH from the eNB to the UE
  • 32 is the PCFICH, PHICH, and PDCCH from the RN to the UE
  • 33 is the PDSCH from the eNB to the UE
  • 34 is from the RN to
  • 35 is the R-PCFICH, R-PHICH, and R-PDCCH from the eNB to the RN
  • 36 is that the RN receives the R_PCFICH, the R-PHICH, the R_PDCCH, and the R-PDSCH from the eNB
  • 37 is the R- from the eNB to the RN.
  • PDSCH, 38 is the conversion band sent to the receiver.
  • the subframe N is a relay subframe.
  • the eNB can semi-statically configure a frequency band of BW R for transmitting downlinks such as R-PCFICH, R-PHICH, and R-PDCCH by considering the channel conditions and traffic of each RN relay link.
  • Relay link control channel The band resource having the width BW R may be a centralized type as shown in FIG. 3A and FIG. 3B, or may be distributed as shown in FIG. 3C.
  • the starting symbols of the R_PCFICH, the R-PHICH, and the R-PDCCH are fixed, that is, when
  • the R-PDSCH resource mapping start symbol set in the same frequency band as the relay control channel is set. As shown in Table 1.
  • the frequency resource occupied by the R-PDSCH of the RN is as shown in FIG. 3B and FIG. 3C, the frequency resource occupied by the R-PDSCH is in the downlink relay chain outside the frequency resource range occupied by the downlink relay link control channel.
  • the R-PDSCH resource mapping start symbol setting of the RN outside the frequency resource range occupied by the path control channel is as shown in Table 2. Table 2
  • the eNB need some mechanism message indicating R-PDSCH OFDM symbols to start the RN, for example: by a group R-PCFICH source information will be occupied by the R-PDCCH OFDM
  • the number of symbols is sent to each RN; another set of source information of the two sets of source information is used to start OFDM symbol position information of the R-PDSCH or OFDM symbols occupied by the PDCCH of the base station to the UE Sent to the RNs.
  • the resource allocation method of the relay link may further include : transmitting the number of OFDM symbols occupied by the R-PDCCH to the RNs. In this way, each RN can calculate the starting OFDM symbol of the R-PDSCH based on the offset value and the number of OFDM symbols occupied by the R-PDCCH.
  • the source information of the 4-bit (bit) R-PCFICH may be divided into two groups, each group including 2 bits of relay link control format indication (R-CFI) source information, which are respectively used to indicate the R-PDCCH station.
  • R-CFI relay link control format indication
  • the number of symbols and the R-PDSCH starting OFDM symbol, SP, and the number of OFDM symbols occupied by the R-PDCCH and the R-PDSCH starting OFDM symbol position information are transmitted to the RNs.
  • the R-PDSCH starting OFDM symbol position information is a deviation value of the R-PDSCH from the starting OFDM symbol of the R-PDCCH, and is used to indicate a set of R-CFI source information and R- of the R-PDSCH starting OFDM symbol.
  • PDSCH starting OFDM The correspondence between the deviation values of the symbols is shown in Table 3.
  • Each group of source information is encoded using the existing PCFICH (32, 2) encoding.
  • Each group of source information is encoded and modulated to obtain 16 symbols, which constitutes 8 R-PCFICH quaternions (a group of 4 symbols), which can be mapped to 8 resource element groups (Resource Element Group, REG).
  • the mapping method of the eight REGs is: Sorting the subcarriers occupied by all the relay control channels from the low frequency to the top, that is, ⁇ ' ⁇ '...' ⁇ 7 ⁇ , and then calculating each REG according to the following formula Mapping the starting position, thereby finding the corresponding relay subcarrier ⁇ to start mapping:
  • the method provided in this embodiment fixes the initial OFDM symbol of the R-PDCCH, so that the R-PDCCH is not affected by the transmission and reception conversion, and can obtain the frequency diversity gain in a large frequency band, thereby ensuring the relay link control information.
  • the R-PDSCH is placed before the R-PDCCH, and the time-frequency resources of the relay link are fully utilized.
  • the eNB side allocates resources, it is not necessary to know the number of OFDM symbols occupied by the PDCCH of the RN to the UE, which saves a certain signaling overhead and avoids early scheduling.
  • the eNB semi-statically configures a frequency band of BW R for transmitting a downlink relay link control channel such as R-PCFICH, R_PHICH, and R-PDCCH.
  • the band width is BW R resources may FIG. 3A, FIG 3B, the centralized type, may be distributed as shown in FIG. 3C.
  • R-PDSCH start symbol I ⁇ 10 > 10
  • FIG. 5 is a flowchart of a method for obtaining shared channel resource allocation information according to an embodiment of the present invention. This embodiment corresponds to the foregoing method embodiment, and specifically includes:
  • Step 51 Receive initial OFDM symbol position information of the R-PDSCH, where the starting OFDM symbol position of the R-PDSCH is determined according to the number of OFDM symbols occupied by the PDCCH of the eNB to the UE and the number of OFDM symbols occupied by the R-PDCCH; The starting OFDM symbol of the R-PDSCH is located before or after the OFDM symbol occupied by the R-PDCCH; the starting OFDM symbol of the R-PDCCH is fixed;
  • the starting OFDM symbol of the R-PDSCH is determined according to the number of OFDM symbols occupied by the eNB to the PDCCH of the UE and the number of OFDM symbols occupied by the R-PDCCH; the starting OFDM symbol of the R-PDSCH is located in the Before or after the OFDM symbol occupied by the R-PDCCH; the starting OFDM symbol of the R-PDCCH is fixed; for details, refer to the description of the above step 21 and FIG. 3A, FIG. 3B, and FIG. 3C.
  • the RN receives the R_PDSCH from the initial OFDM symbol of the R-PDSCH calculated in the above step 62.
  • the RN calculates the starting OFDM symbol of the R-PDSCH according to the number of OFDM symbols occupied by the eNB to the UE transmitted by the eNB, and the starting OFDM symbol allocated by the R-PDSCH is based on the starting OFDM.
  • the symbol-fixed R-PDCCH is obtained, so that the RN receives the R-PDSCH from the calculated initial OFDM symbol. The conversion effect is affected, and the correct reception of the data information is guaranteed.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station can be an eNB, including a determining module 71 and a transmitting module 72.
  • the determining module 71 is configured to determine a starting OFDM symbol position of the R-PDSCH according to the number of OFDM symbols occupied by the PDCCH and the R-PDCCH; the starting OFDM symbol of the R-PDSCH is located before the OFDM symbol occupied by the R-PDCCH or Thereafter; the starting OFDM symbol of the R-PDCCH is fixed.
  • the RN can learn the resource allocation information of the base station side, thereby correctly receiving the data in the R-PDSCH.
  • the DCI format added in the R-PDCCH or by increasing the number of bits in the DCI format, receiving the start OFDM symbol position information of the R-PDSCH or the number of OFDM symbols occupied by the PDCCH of the base station to the UE, or The number of OFDM symbols occupied by the high layer signaling or the R-PDCCH is received.
  • the RN can receive the R-PDSCH accurately by receiving the initial OFDM symbol position information of the R-PDSCH, and the initial OFDM symbol allocated by the R-PDSCH is obtained according to the fixed R-PDCCH of the initial 0FDM symbol, thereby obtaining Make The RN receives the R-PDSCH from the transmission and reception conversion, and ensures the correct reception of the data information.
  • the calculating module 92 is configured to calculate, according to the OFDM symbol number occupied by the PDCCH, a starting OFDM symbol of the R-PDSCH, and the starting OFDM symbol of the R-PDSCH according to the OFDM symbol number occupied by the eNB to the UE and the R Determining the number of OFDM symbols occupied by the PDCCH; the starting OFDM symbol of the R-PDSCH is located before or after the OFDM symbol occupied by the R-PDCCH; and the starting OFDM symbol of the R-PDCCH is fixed.
  • the R-PDSCH receiving module 93 is configured to receive the R_PDSCH according to a starting OFDM symbol of the R-PDSCH.
  • the starting positions of the downlink relay link control channels R_PCFICH, R-PHICH, and R-PDCCH are fixed, which avoids the downlink relay link control channel from being affected by the transmission and reception conversion, and can be obtained in a larger frequency band.
  • the frequency diversity gain ensures correct reception of relay link control information.
  • the PDCCH of the eNB to the UE occupies a small number of OFDM symbols
  • the R-PDSCH is placed before the R-PDCCH, and the time-frequency resources of the relay link are fully utilized.
  • the eNB side resources are mapped, it is not necessary to know the number of OFDM symbols occupied by the PDCCH of the RN to the UE, which saves a certain signaling overhead and avoids early scheduling.
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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

Abstract

La présente invention se rapporte à un procédé adapté pour indiquer une allocation de ressources d'une liaison relais. Elle se rapporte également à un procédé et à un dispositif adaptés pour obtenir des informations d'allocation de ressources. Le procédé selon l'invention, adapté pour indiquer une allocation de ressources, consiste : à déterminer la position du symbole de multiplexage par répartition orthogonale de la fréquence (OFDM) initial du canal physique partagé sur la liaison descendante de la liaison relais (R-PDSCH); à informer chaque nœud relais (RN) des informations de position du symbole OFDM initial dudit R-PDSCH; ou à informer chaque RN du nombre des symboles OFDM occupés par le canal de contrôle physique sur la liaison descendante de la liaison relais (R-PDCCH) et du nombre des symboles OFDM occupés par le canal de contrôle physique sur la liaison descendante (PDCCH), de la station de base à l'équipement d'utilisateur (EU), afin que chacun desdits RN puisse déterminer la position du symbole OFDM initial dudit R-PDSCH. Les modes de réalisation de la présente invention permettent à des RN d'obtenir des informations d'allocation de ressources du côté de la station de base et de recevoir ainsi les données correctement dans le R-PDSCH.
PCT/CN2010/076708 2009-09-10 2010-09-08 Procédé adapté pour indiquer une allocation de ressources d'une liaison relais, et procédé et dispositif adaptés pour obtenir des informations d'allocation de ressources WO2011029386A1 (fr)

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CN200910174724.7 2009-09-10

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CN103491556A (zh) * 2012-06-13 2014-01-01 华为技术服务有限公司 一种网络调整的方法及装置
WO2016074250A1 (fr) * 2014-11-15 2016-05-19 Panasonic Intellectual Property Corporation Of America Procédé de planification de ressources, nœud b évolué, équipement utilisateur et procédé de détermination de ressources
EP3236611A1 (fr) * 2011-05-02 2017-10-25 NTT DoCoMo, Inc. Appareil de terminal d'utilisateur, appareil de station de base et procédé de communication radio
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TWI769324B (zh) * 2017-09-29 2022-07-01 大陸商Ｏｐｐｏ廣東移動通信有限公司 傳輸資料的方法、終端設備和網路設備

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WO2013009145A2 (fr) * 2011-07-14 2013-01-17 엘지전자 주식회사 Procédé et dispositif permettant de définir un canal de commande et un canal de données dans un système de communication sans fil
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EP3236611A1 (fr) * 2011-05-02 2017-10-25 NTT DoCoMo, Inc. Appareil de terminal d'utilisateur, appareil de station de base et procédé de communication radio
CN103491556A (zh) * 2012-06-13 2014-01-01 华为技术服务有限公司 一种网络调整的方法及装置
WO2016074250A1 (fr) * 2014-11-15 2016-05-19 Panasonic Intellectual Property Corporation Of America Procédé de planification de ressources, nœud b évolué, équipement utilisateur et procédé de détermination de ressources
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TWI769324B (zh) * 2017-09-29 2022-07-01 大陸商Ｏｐｐｏ廣東移動通信有限公司 傳輸資料的方法、終端設備和網路設備
CN113115593A (zh) * 2018-11-12 2021-07-13 Oppo广东移动通信有限公司 装置及用于装置的非连续接收的方法
CN113115593B (zh) * 2018-11-12 2023-05-09 Oppo广东移动通信有限公司 装置及用于装置的非连续接收的方法

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