CN101826908B - Data transmission method of relay system - Google Patents
Data transmission method of relay system Download PDFInfo
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- CN101826908B CN101826908B CN200910126256.6A CN200910126256A CN101826908B CN 101826908 B CN101826908 B CN 101826908B CN 200910126256 A CN200910126256 A CN 200910126256A CN 101826908 B CN101826908 B CN 101826908B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 title claims abstract description 18
- 125000004122 cyclic group Chemical group 0.000 claims description 16
- 230000001174 ascending effect Effects 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 7
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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 data transmission method of relay system.
Background technology
Relaying (Relay) technology as a kind of emerging technology, has caused more and more widely and has noted, has been regarded as the key technology of B3G/4G.Because future wireless system or cellular system require to improve the network coverage, support higher rate transmission, this has proposed new challenge to wireless communication technology.Meanwhile, 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 causing is thus more serious.By relaying technique, traditional one hop link can be divided into a plurality of multi-hop links, due to Distance Shortened, this will greatly reduce path loss, contribute to improve transmission quality, expand communication range, thereby provide quicker better service for user.
Introducing relay station (Relay Station, RS) in network, link in network between base station and relay station is called repeated link, relay station and subscriber equipment (User Equipment, UE) between, link is called access link (Access Link), between relay station and base station and UE, need to carry out certain resource division configuration, wherein the subframe for communication between base station on repeated link and relay station is called relay sub-frame, to be different from for the shared subframe of communication between relay station on access link and UE, because relay station can not receive and transmit in same frequency range simultaneously, and can not be simultaneously to base station and user (herein not under special note, user refers under RS to accept the UE of service) transmitted signal or receive signal from base station and user, and the configuration of relay sub-frame need be considered the compatibility issue to lowest version user.
Relay sub-frame configuration is for relay station and inter base station communication, the restriction that receives/transmit according to above-mentioned relay station, in relay sub-frame, between UE 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, backwards compatibility for keeping system, although therefore RS does not carry out business data transmission with UE in relay sub-frame, need to carry out necessary Downlink Control Information transmission.
At present in the agreement of LTE, two kinds of channels for uplink: Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel) and Physical Uplink Control Channel (PUCCH, Physical Uplink Control Channel) standard is: on distributed some subcarriers, occupy the whole OFDM symbols in subframe, for the transmission of upstream data.In uplink relay subframe, because RS need to send certain control information to UE, RS cannot be used all OFDM symbols in subframe to base station, to carry out uplink, be that RS can not be used oneself PUCCH and PUSCH channel of having of LTE, the transmission of upstream data is carried out in up channel form and base station that can not according to agreement, oneself has.
In the frame structure of LTE, each subframe consists of some OFDM symbols at present, in order to reduce intersymbol interference, in each OFDM symbol, add certain Cyclic Prefix (cyclic prefix, CP), the in the situation that 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 Length Ratio common CP of wherein expanding CP is long, so in a subframe, if be configured to expand CP structure, in a subframe, have 12 OFDM symbols, if be configured to common CP, in a subframe, have 14 OFDM symbols, 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 data transmission method of relay system, solves the problem that relay uplink cannot be used original physical uplink channel form, 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 OFDM symbol sends Downlink Control Information to subscriber equipment at front n OFDM symbol of uplink relay subframe, on the physical uplink trunk channel consisting of m OFDM symbol in this uplink relay subframe, to base station, send upstream data, described n and m are integer; Between described n OFDM symbol and this m OFDM symbol, be set a time interval, a time interval be set between described m OFDM symbol and next subframe or do not set interval; Described m OFDM symbol refers in this uplink relay subframe except this n OFDM symbol and the residue OFDM symbol the described time interval.
Further, said method also can have following characteristics, and described n is 1 or 2.
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 adopts general cyclic prefix, the m of described physical uplink trunk channel OFDM symbol adopts general cyclic prefix or extended cyclic prefix.
Further, said method also can have following characteristics, and when described n OFDM symbol adopts extended cyclic prefix, the m of described physical uplink trunk channel OFDM symbol adopts general cyclic prefix or extended cyclic prefix.
Data transmission method of relay system of the present invention, when ensureing lowest version user compatibility, has realized the effective uplink between relay station and base station.
Accompanying drawing explanation
Fig. 1 is LTE system subframe structure schematic diagram;
Fig. 2 is example one 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, front n OFDM symbol in this uplink relay subframe sends Downlink Control Information for RS to UE, sends upstream data on the m in this uplink relay subframe OFDM symbol to base station, and n and m are integer.Described upstream data comprises uplink business data and/or ascending control information.
Described m OFDM symbol forms physics uplink relay 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, n value is 1 or 2.
Wherein, this m OFDM symbol refers to the residue OFDM symbol except this n OFDM symbol and Gap in this uplink relay subframe.
In uplink relay subframe, while adopting common CP structure for carrying RS to front n OFDM symbol of the Downlink Control Information of UE, PURCH can be by adopting an integer OFDM symbol of common CP or expansion CP to form.
In uplink relay subframe, while expanding CP structure for carrying RS to front n OFDM symbol employing of the Downlink Control Information of UE, PURCH can be by adopting an integer OFDM symbol of common CP or expansion CP to form.
The present invention proposes a kind of data transmission method of relay system, relay station sends Downlink Control Information to subscriber equipment on front n OFDM symbol of uplink relay subframe, on PURCH, to base station, send upstream data, upstream data comprises uplink business data and/or ascending control information.
In LTE system, every subframe is comprised 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 different situations here.
Embodiment mono-:
Be located in the uplink relay subframe of system configuration, carrying RS adopts normal CP to the symbol of the Downlink Control Information of UE.When RS is configured on first OFDM symbol carrying as required to the Downlink Control Information of UE, and on PURCH, adopt normal CP, after Gap, uplink relay subframe also configurable 12 OFDM symbols with normal CP forms PURCH.When RS is configured in, on the first two symbol, carrying is to the Downlink Control Information of UE, and after Gap, uplink relay subframe can also configure 11 OFDM symbols with normal CP and form PURCH.RS is the uplink business data of repeated link and/or ascending control information, as HARQ feedback information etc., is carried on that PURCH is upper carries out up transmitting to base station.
Embodiment bis-:
Be located in the uplink relay subframe of system configuration, carrying RS adopts normal CP to the symbol of the Downlink Control Information of UE.When RS is configured on first OFDM symbol carrying as required to the Downlink Control Information of UE, and on PURCH, adopt extend CP, after Gap, uplink relay subframe is configurable 10 OFDM symbols with extend CP also, and PURCH consists of the OFDM symbol of 10 extend CP.When RS is configured in, on the first two symbol, carrying is to the Downlink Control Information of UE, and after Gap, uplink relay subframe can also configure 10 OFDM symbols with extend CP and form PURCH.RS is the uplink business data of repeated link and/or ascending control information, as HARQ feedback information etc., is carried on that PURCH is upper carries out up transmitting to base station.
Embodiment tri-:
Be located in the uplink relay subframe of system configuration, carrying RS adopts extend CP to the symbol of the Downlink Control Information of UE.When RS is configured on first OFDM symbol carrying as required to the Downlink Control Information of UE, and on PURCH, adopt normal CP, after Gap, uplink relay subframe also configurable 12 OFDM symbols with normal CP forms PURCH.When RS is configured in, on the first two symbol, carrying is to the Downlink Control Information of UE, and after Gap, uplink relay subframe can also configure 11 OFDM symbols with normal CP and form PURCH.RS is the uplink business data of repeated link and/or ascending control information, as HARQ feedback information etc., is carried on that PURCH is upper carries out up transmitting to base station.
Embodiment tetra-:
Be located in the uplink relay subframe of system configuration, carrying RS adopts extend CP to the symbol of the Downlink Control Information of UE.When RS is configured on first OFDM symbol carrying as required to the Downlink Control Information of UE, and on PURCH, adopt extend CP, after Gap, uplink relay subframe also configurable 10 OFDM symbols with extend CP forms PURCH.When RS is configured in, on the first two symbol, carrying is to the Downlink Control Information of UE, and after Gap, uplink relay subframe can also configure 9 OFDM symbols with extend CP and form PURCH.RS by the uplink business data of repeated link and or ascending control information, as HARQ feedback information etc., be carried on that PURCH is upper carries out up transmitting to base station.
Embodiment five:
Be located in the uplink relay subframe of system configuration, carrying RS adopts normal CP to the symbol of the Downlink Control Information of UE.When RS is configured on first OFDM symbol carrying as required to the Downlink Control Information of UE, and on PURCH, adopt normal CP, after Gap, uplink relay subframe also configurable 12 OFDM symbols with normal CP forms PURCH, and certain Gap is set after PURCH.When RS is configured in, on the first two symbol, carrying is to the Downlink Control Information of UE, and after Gap, uplink relay subframe can also configure 11 OFDM symbols with normal CP and form PURCH, and certain Gap is set after PURCH.RS is the uplink business data of repeated link and/or ascending control information, as HARQ feedback information etc., is carried on that PURCH is upper carries out up transmitting to base station, carries out the signal transmitting and receiving of next son frame after Gap adjusts.
Embodiment six:
Be located in the uplink relay subframe of system configuration, carrying RS adopts normal CP to the symbol of the Downlink Control Information of UE.When RS is configured on first OFDM symbol carrying as required to the Downlink Control Information of UE, and on PURCH, adopt extend CP, after Gap, uplink relay subframe is configurable 10 OFDM symbols with extend CP also, PURCH consists of the OFDM symbol of 10 extend CP, and certain Gap is set after PURCH.When RS is configured in, on the first two symbol, carrying is to the Downlink Control Information of UE, and after Gap, uplink relay subframe can also configure 10 OFDM symbols with extend CP and form PURCH, and certain Gap is set after PURCH.RS is the uplink business data of repeated link and/or ascending control information, as HARQ feedback information etc., is carried on that PURCH is upper carries out up transmitting to base station, carries out the signal transmitting and receiving of next son frame after Gap adjusts.
Embodiment seven:
Be located in the uplink relay subframe of system configuration, carrying RS adopts extend CP to the symbol of the Downlink Control Information of UE.When RS is configured on first OFDM symbol carrying as required to the Downlink Control Information of UE, and on PURCH, adopt normal CP, after Gap, uplink relay subframe also configurable 12 OFDM symbols with normal CP forms PURCH, and certain Gap is set after PURCH.When RS is configured in, on the first two symbol, carrying is to the Downlink Control Information of UE, and after Gap, uplink relay subframe can also configure 11 OFDM symbols with normal CP and form PURCH, and certain Gap is set after PURCH.RS is the uplink business data of repeated link and/or ascending control information, as HARQ feedback information etc., is carried on that PURCH is upper carries out up transmitting to base station, carries out the signal transmitting and receiving of next son frame after Gap adjusts.
Embodiment eight:
Be located in the uplink relay subframe of system configuration, carrying RS adopts extend CP to the symbol of the Downlink Control Information of UE.When RS is configured on first OFDM symbol carrying as required to the Downlink Control Information of UE, and on PURCH, adopt extend CP, after Gap, uplink relay subframe also configurable 10 OFDM symbols with extend CP forms PURCH, and certain Gap is set after PURCH.When RS is configured in, on the first two symbol, carrying is to the Downlink Control Information of UE, and after Gap, uplink relay subframe can also configure 9 OFDM symbols with extend CP and form PURCH, and certain Gap is set after PURCH.RS is the uplink business data of repeated link and/or ascending control information, as HARQ feedback information etc., is carried on that PURCH is upper carries out up transmitting to base station, carries out the signal transmitting and receiving of next son frame after Gap adjusts.
Claims (5)
1. data transmission method in a relay system, it is characterized in that, relay station is that OFDM symbol sends Downlink Control Information to subscriber equipment at front n OFDM symbol of uplink relay subframe, on the physical uplink trunk channel consisting of m OFDM symbol in this uplink relay subframe, to base station, send upstream data, described n and m are integer; Between described n OFDM symbol and this m OFDM symbol, be set a time interval, a time interval be set between described m OFDM symbol and next subframe or do not set interval; Described m OFDM symbol refers in this uplink relay subframe that, except this n OFDM symbol and the residue OFDM symbol the described time interval, 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, described upstream data is uplink business data and/or ascending control information.
4. the method as described in as arbitrary in claims 1 to 3, is characterized in that, when described n OFDM symbol adopts general cyclic prefix, and the m of described physical uplink trunk channel OFDM symbol employing general cyclic prefix or extended cyclic prefix.
5. the method as described in as arbitrary in claims 1 to 3, is characterized in that, when described n OFDM symbol adopts extended cyclic prefix, and the m of described physical uplink trunk channel OFDM symbol employing general cyclic prefix or extended cyclic prefix.
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| CN200910126256.6A CN101826908B (en) | 2009-03-06 | 2009-03-06 | Data transmission method of relay system |
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| CN101826908B true CN101826908B (en) | 2014-02-26 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070001791A (en) * | 2005-06-29 | 2007-01-04 | 이시동 | Adaptive gps tdd repeater and method |
| CN101166055A (en) * | 2006-10-18 | 2008-04-23 | 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 |
| CN101374015A (en) * | 2007-08-20 | 2009-02-25 | 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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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070001791A (en) * | 2005-06-29 | 2007-01-04 | 이시동 | Adaptive gps tdd repeater and method |
| CN101166055A (en) * | 2006-10-18 | 2008-04-23 | 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 |
| CN101374015A (en) * | 2007-08-20 | 2009-02-25 | 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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