CN101826908A - Data transmission method of relay system and uplink relay subframe - Google Patents
Data transmission method of relay system and uplink relay subframe Download PDFInfo
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- CN101826908A CN101826908A CN200910126256A CN200910126256A CN101826908A CN 101826908 A CN101826908 A CN 101826908A CN 200910126256 A CN200910126256 A CN 200910126256A CN 200910126256 A CN200910126256 A CN 200910126256A CN 101826908 A CN101826908 A CN 101826908A
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Abstract
The invention provides a data transmission method of a relay system. A relay station sends downlink control information to the user device at the first n OFDM marks of an uplink relay subframe and sends uplink data to a base station at a physical uplink relay channel consisting of m OFDM marks in the uplink relay subframe. N and m are integer. The invention further provides an uplink relay subframe. The invention realizes the effective uplink data transmission from the relay station to the base station when ensuring the compatibility of the low-version user.
Description
Technical field
The invention belongs to moving communicating field, relate in particular to a kind of relay system data transmission method and uplink relay subframe.
Background technology
Relaying (Relay) technology has caused attention more and more widely as a kind of emerging technology, is regarded as the key technology of B3G/4G.Because following radio communication or cellular system require to improve the network coverage, support the higher rate transmission, this has proposed new challenge to wireless communication technology.Simultaneously, the cost issues of system building and maintenance is more outstanding.Along with the increase of transmission rate and communication distance, it is outstanding that the energy consumption issues of battery also becomes, and following radio communication will adopt higher frequency, and the pathloss attenuation that causes thus is more serious.By relaying technique, traditional one hop link can be divided into a plurality of multi-hop links, because distance shortens, this will greatly reduce path loss, help to improve transmission quality, enlarge communication range, thereby provide quicker better service for the user.
Introducing relay station (Relay Station, RS) in the network, link in the network between base station and relay station is called repeated link, relay station and subscriber equipment (User Equipment, UE) link is called access link (Access Link) between, need carry out certain resource division configuration between relay station and base station and UE, be used for wherein on the repeated link that the subframe of message transmission is called relay sub-frame between base station and relay station, be used on the access link the shared subframe of message transmission between relay station and UE to be different from, because relay station can not receive in same frequency range and transmit simultaneously, and can not be simultaneously (this paper is not under the special note to base station and user, the user refers under RS to accept the UE of service) send signal or from base station and user's received signal, and the configuration of relay sub-frame need be considered the compatibility issue to the lowest version user.
Relay sub-frame configuration is used for relay station and inter base station communication, the restriction that receives/transmit according to above-mentioned relay station, between UE on the relay sub-frame and relay station, do not carry out business data transmission, but because the control informations such as feedback message of HARQ process have certain set time relation, for keeping the backwards compatibility of system, though therefore RS does not carry out business data transmission with UE in relay sub-frame, need carry out necessary Downlink Control Information transmission.
At present in the agreement of LTE, two kinds of channels that are used for uplink: Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel) and Physical Uplink Control Channel (PUCCH, Physical Uplink Control Channel) standard is: occupy the whole OFDM symbols in the subframe on the plurality of sub carrier wave that is distributed, be used for transmission of uplink data.On uplink relay subframe, because RS need send certain control information to UE, then RS can't use interior all the OFDM symbols of subframe to carry out uplink to the base station, be that RS can not use existing PUCCH of LTE and PUSCH channel, can not carry out transmission of uplink data according to existing up channel form of agreement and base station.
Each subframe is made of some OFDM symbols in the frame structure of LTE at present, in order to reduce intersymbol interference, in each OFDM symbol, add certain Cyclic Prefix (cyclic prefix, CP), under the situation of 15KHz subcarrier spacing, have two kinds of CP, be respectively common CP (Normal cyclic prefix) and expansion CP (Extended cyclic prefix).The length of wherein expanding CP is longer than the length of common CP, so in a subframe, if be configured to expand the CP structure, then have 12 OFDM symbols on a subframe, if be configured to common CP, then have 14 OFDM symbols on a subframe, the subframe structure under these two kinds of CP configurations as shown in Figure 1.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of relay system data transmission method and a kind of uplink relay subframe, solves the problem that relay uplink can't be used original physical uplink channel format, realizes the effective uplink between relay station and base station.
In order to address the above problem, the invention provides data transmission method in a kind of relay system, relay station is that the OFDM symbol sends Downlink Control Information to subscriber equipment at preceding n OFDM symbol of uplink relay subframe, send upstream data to the base station on the physical uplink trunk channel that is made of m OFDM symbol in this uplink relay subframe, described n and m are integer.
Further, said method also can have following characteristics, and described n is 1 or 2.
Further, said method also can have following characteristics, between described n OFDM symbol and this m OFDM symbol is set a time interval, a time interval is set between described m OFDM symbol and next subframe or does not set interval.
Further, said method also can have following characteristics, and described m OFDM symbol refers on this uplink relay subframe except that this n OFDM symbol and the residue OFDM symbol the described time interval.
Further, said method also can have following characteristics, and described upstream data is uplink business data and/or ascending control information.
Further, said method also can have following characteristics, and when described n OFDM symbol adopted general cyclic prefix, the m of described physical uplink trunk channel OFDM symbol adopted general cyclic prefix or extended cyclic prefix.
Further, said method also can have following characteristics, and when described n OFDM symbol adopted extended cyclic prefix, the m of described physical uplink trunk channel OFDM symbol adopted general cyclic prefix or extended cyclic prefix.
The present invention also proposes a kind of uplink relay subframe, preceding n OFDM symbol of described uplink relay subframe is used for the Downlink Control Information that the transmission trunking station sends to subscriber equipment, the physical uplink trunk channel that is made of the m on this uplink relay subframe OFDM symbol is used for the upstream data that the transmission trunking station sends to the base station, and described n and m are integer.
Further, above-mentioned uplink relay subframe also can have following characteristics, and described n is 1 or 2.
Further, above-mentioned uplink relay subframe also can have following characteristics, between described n OFDM symbol and described m OFDM symbol is set a time interval, a time interval is set between described m OFDM symbol and next subframe or does not set interval.
Relay system data transmission method of the present invention and uplink relay subframe when ensureing lowest version user compatibility, have realized the effective uplink between relay station and base station.
Description of drawings
Fig. 1 is a LTE system subframe structure schematic diagram;
Fig. 2 is example one a uplink relay subframe schematic diagram of the present invention;
Fig. 3 is example two uplink relay subframe schematic diagrames of the present invention;
Fig. 4 is example three uplink relay subframe schematic diagrames of the present invention;
Fig. 5 is example four uplink relay subframe schematic diagrames of the present invention;
Fig. 6 is example five uplink relay subframe schematic diagrames of the present invention;
Fig. 7 is example six uplink relay subframe schematic diagrames of the present invention;
Fig. 8 is example seven uplink relay subframe schematic diagrames of the present invention;
Fig. 9 is example eight uplink relay subframe schematic diagrames of the present invention.
Embodiment
The present invention proposes a kind of uplink relay subframe, preceding n OFDM symbol in this uplink relay subframe is used for RS and sends Downlink Control Information to UE, sends upstream data to the base station on the m in this uplink relay subframe the OFDM symbol, and n and m are integer.Described upstream data comprises uplink business data and/or ascending control information.
Described m 0FDM symbol constitutes physical uplink trunk channel (PURCH).
Wherein, between this n OFDM symbol and this m OFDM symbol, be set a time interval (Gap).Gap is set between this m OFDM symbol and next subframe or Gap is not set.
Wherein, the n value is 1 or 2.
Wherein, this m OFDM symbol refers to the residue OFDM symbol except that this n OFDM symbol and Gap on this uplink relay subframe.
In the uplink relay subframe, when being used to carry preceding n OFDM symbol that RS gives the Downlink Control Information of UE and adopting the common CP structure, PURCH can be made of an integer OFDM symbol that adopts common CP or expand CP.
In the uplink relay subframe, when being used to carry preceding n OFDM symbol that RS gives the Downlink Control Information of UE and adopting expansion CP structure, PURCH can be made of an integer OFDM symbol that adopts common CP or expand CP.
The present invention proposes a kind of relay system data transmission method, relay station sends Downlink Control Information to subscriber equipment on preceding n OFDM symbol of uplink relay subframe, send upstream data to the base station on PURCH, upstream data comprises uplink business data and/or ascending control information.
In the LTE system, every subframe is made up of several OFDM symbols, and in same subframe, the symbol of the symbol of bearing downlink control information and bearer service data can adopt dissimilar CP, is given in the embodiment of PURCH under the different situations here.
Embodiment one:
Be located on the uplink relay subframe of system configuration, carrying RS adopts normal CP for the symbol of the Downlink Control Information of UE.Carry the Downlink Control Information of giving UE on first OFDM symbol when RS is configured in as required, and adopt normal CP on PURCH, behind process Gap, also configurable 12 the OFDM symbols with normal CP of uplink relay subframe constitute PURCH.Carrying is to the Downlink Control Information of UE on preceding two symbols when RS is configured in, and behind process Gap, uplink relay subframe can also dispose 11 OFDM symbols with normal CP and constitute PURCH.RS is the uplink business data and/or the ascending control information of repeated link, as the HARQ feedback information etc., is carried on PURCH and goes up and carry out up emission to the base station.
Embodiment two:
Be located on the uplink relay subframe of system configuration, carrying RS adopts normal CP for the symbol of the Downlink Control Information of UE.When being configured in as required, RS carries the Downlink Control Information of giving UE on first OFDM symbol, and on PURCH, adopt extend CP, behind process Gap, also configurable 10 the OFDM symbols with extend CP of uplink relay subframe, then PURCH is made of the OFDM symbol of 10 extend CP.Carrying is to the Downlink Control Information of UE on preceding two symbols when RS is configured in, and behind process Gap, uplink relay subframe can also dispose 10 OFDM symbols with extend CP and constitute PURCH.RS is the uplink business data and/or the ascending control information of repeated link, as the HARQ feedback information etc., is carried on PURCH and goes up and carry out up emission to the base station.
Embodiment three:
Be located on the uplink relay subframe of system configuration, carrying RS adopts extend CP for the symbol of the Downlink Control Information of UE.Carry the Downlink Control Information of giving UE on first OFDM symbol when RS is configured in as required, and adopt normal CP on PURCH, behind process Gap, also configurable 12 the OFDM symbols with normal CP of uplink relay subframe constitute PURCH.Carrying is to the Downlink Control Information of UE on preceding two symbols when RS is configured in, and behind process Gap, uplink relay subframe can also dispose 11 OFDM symbols with normal CP and constitute PURCH.RS is the uplink business data and/or the ascending control information of repeated link, as the HARQ feedback information etc., is carried on PURCH and goes up and carry out up emission to the base station.
Embodiment four:
Be located on the uplink relay subframe of system configuration, carrying RS adopts extend CP for the symbol of the Downlink Control Information of UE.Carry the Downlink Control Information of giving UE on first OFDM symbol when RS is configured in as required, and adopt extend CP on PURCH, behind process Gap, also configurable 10 the OFDM symbols with extend CP of uplink relay subframe constitute PURCH.Carrying is to the Downlink Control Information of UE on preceding two symbols when RS is configured in, and behind process Gap, uplink relay subframe can also dispose 9 OFDM symbols with extend CP and constitute PURCH.RS with the uplink business data of repeated link and or ascending control information, as the HARQ feedback information etc., be carried on PURCH and go up and carry out up emission to the base station.
Embodiment five:
Be located on the uplink relay subframe of system configuration, carrying RS adopts normal CP for the symbol of the Downlink Control Information of UE.When being configured in as required, RS carries the Downlink Control Information of giving UE on first OFDM symbol, and on PURCH, adopt normal CP, behind process Gap, also configurable 12 the OFDM symbols with normal CP of uplink relay subframe constitute PURCH, and certain Gap is set behind PURCH.Carrying is to the Downlink Control Information of UE on preceding two symbols when RS is configured in, and behind process Gap, uplink relay subframe can also dispose 11 OFDM symbols with normal CP and constitute PURCH, and certain Gap is set behind PURCH.RS is the uplink business data and/or the ascending control information of repeated link, as the HARQ feedback information etc., is carried on PURCH and goes up and carry out up emission to the base station, carries out the signal transmitting and receiving of next son frame after adjusting through Gap.
Embodiment six:
Be located on the uplink relay subframe of system configuration, carrying RS adopts normal CP for the symbol of the Downlink Control Information of UE.When being configured in as required, RS carries the Downlink Control Information of giving UE on first OFDM symbol, and on PURCH, adopt extend CP, behind process Gap, also configurable 10 the OFDM symbols of uplink relay subframe with extend CP, then PURCH is made of the OFDM symbol of 10 extend CP, and certain Gap is set behind PURCH.Carrying is to the Downlink Control Information of UE on preceding two symbols when RS is configured in, and behind process Gap, uplink relay subframe can also dispose 10 OFDM symbols with extend CP and constitute PURCH, and certain Gap is set behind PURCH.RS is the uplink business data and/or the ascending control information of repeated link, as the HARQ feedback information etc., is carried on PURCH and goes up and carry out up emission to the base station, carries out the signal transmitting and receiving of next son frame after adjusting through Gap.
Embodiment seven:
Be located on the uplink relay subframe of system configuration, carrying RS adopts extend CP for the symbol of the Downlink Control Information of UE.When being configured in as required, RS carries the Downlink Control Information of giving UE on first OFDM symbol, and on PURCH, adopt normal CP, behind process Gap, also configurable 12 the OFDM symbols with normal CP of uplink relay subframe constitute PURCH, and certain Gap is set behind PURCH.Carrying is to the Downlink Control Information of UE on preceding two symbols when RS is configured in, and behind process Gap, uplink relay subframe can also dispose 11 OFDM symbols with normal CP and constitute PURCH, and certain Gap is set behind PURCH.RS is the uplink business data and/or the ascending control information of repeated link, as the HARQ feedback information etc., is carried on PURCH and goes up and carry out up emission to the base station, carries out the signal transmitting and receiving of next son frame after adjusting through Gap.
Embodiment eight:
Be located on the uplink relay subframe of system configuration, carrying RS adopts extend CP for the symbol of the Downlink Control Information of UE.When being configured in as required, RS carries the Downlink Control Information of giving UE on first OFDM symbol, and on PURCH, adopt extend CP, behind process Gap, also configurable 10 the OFDM symbols with extend CP of uplink relay subframe constitute PURCH, and certain Gap is set behind PURCH.Carrying is to the Downlink Control Information of UE on preceding two symbols when RS is configured in, and behind process Gap, uplink relay subframe can also dispose 9 OFDM symbols with extend CP and constitute PURCH, and certain Gap is set behind PURCH.RS is the uplink business data and/or the ascending control information of repeated link, as the HARQ feedback information etc., is carried on PURCH and goes up and carry out up emission to the base station, carries out the signal transmitting and receiving of next son frame after adjusting through Gap.
Claims (10)
1. data transmission method in the relay system, it is characterized in that, relay station is that the OFDM symbol sends Downlink Control Information to subscriber equipment at preceding n OFDM symbol of uplink relay subframe, send upstream data to the base station on the physical uplink trunk channel that is made of m OFDM symbol in this uplink relay subframe, described n and m are integer.
2. the method for claim 1 is characterized in that, described n is 1 or 2.
3. the method for claim 1 is characterized in that, between described n OFDM symbol and this m OFDM symbol is set a time interval, a time interval is set between described m OFDM symbol and next subframe or does not set interval.
4. the method for claim 1 is characterized in that, described m OFDM symbol refers on this uplink relay subframe except that this n OFDM symbol and the residue OFDM symbol the described time interval.
5. the method for claim 1 is characterized in that, described upstream data is uplink business data and/or ascending control information.
6. as the arbitrary described method of claim 1 to 5, it is characterized in that when described n OFDM symbol adopted general cyclic prefix, the m of described physical uplink trunk channel OFDM symbol adopted general cyclic prefix or extended cyclic prefix.
7. as the arbitrary described method of claim 1 to 5, it is characterized in that when described n OFDM symbol adopted extended cyclic prefix, the m of described physical uplink trunk channel OFDM symbol adopted general cyclic prefix or extended cyclic prefix.
8. uplink relay subframe, it is characterized in that, preceding n OFDM symbol of described uplink relay subframe is used for the Downlink Control Information that the transmission trunking station sends to subscriber equipment, the physical uplink trunk channel that is made of the m on this uplink relay subframe OFDM symbol is used for the upstream data that the transmission trunking station sends to the base station, and described n and m are integer.
9. uplink relay subframe as claimed in claim 8 is characterized in that, described n is 1 or 2.
10. uplink relay subframe as claimed in claim 8 or 9, it is characterized in that, between described n OFDM symbol and described m OFDM symbol, be set a time interval, a time interval is set between described m OFDM symbol and next subframe or does not set interval.
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| CN200910126256.6A CN101826908B (en) | 2009-03-06 | 2009-03-06 | Data transmission method of relay system |
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| CN200910126256.6A CN101826908B (en) | 2009-03-06 | 2009-03-06 | Data transmission method of relay system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017066967A1 (en) * | 2015-10-22 | 2017-04-27 | 华为技术有限公司 | Method and apparatus for sending downlink control information (dci) |
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| KR20070001791A (en) * | 2005-06-29 | 2007-01-04 | 이시동 | Adaptive gps tdd repeater and method |
| CN101166055B (en) * | 2006-10-18 | 2011-06-01 | 华为技术有限公司 | Multi-hop relay method and multi-hop relay system |
| KR100855004B1 (en) * | 2007-03-12 | 2008-08-28 | 삼성탈레스 주식회사 | Method for communicating in mmr system using frame structure for transparent relay station |
| CN101374015B (en) * | 2007-08-20 | 2014-12-10 | 中兴通讯股份有限公司 | Wireless transmission method supporting relay mode and physical layer frame structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017066967A1 (en) * | 2015-10-22 | 2017-04-27 | 华为技术有限公司 | Method and apparatus for sending downlink control information (dci) |
| US10973012B2 (en) | 2015-10-22 | 2021-04-06 | Huawei Technologies Co, Ltd. | Downlink control information DCI sending method and apparatus |
| US11497013B2 (en) | 2015-10-22 | 2022-11-08 | Huawei Technologies Co., Ltd. | Downlink control information DCI sending method and apparatus |
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