CN102474388A - Method and equipment for cooperative relaying used in wireless communication system - Google Patents

Method and equipment for cooperative relaying used in wireless communication system Download PDF

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Publication number
CN102474388A
CN102474388A CN2009801598683A CN200980159868A CN102474388A CN 102474388 A CN102474388 A CN 102474388A CN 2009801598683 A CN2009801598683 A CN 2009801598683A CN 200980159868 A CN200980159868 A CN 200980159868A CN 102474388 A CN102474388 A CN 102474388A
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China
Prior art keywords
access link
packet
receiving device
trunk desk
link
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CN2009801598683A
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CN102474388B (en
Inventor
陈继明
冷晓冰
刘继民
张凯宾
金珊
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Nokia Shanghai Bell Co Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0076—Distributed coding, e.g. network coding, involving channel coding
    • H04L1/0077—Cooperative coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0637—Properties of the code
    • H04L1/0668—Orthogonal systems, e.g. using Alamouti codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays

Abstract

The present application discloses a method and equipment for cooperative relaying used in wireless communications systems, wherein the method includes: receiving the data packets sent by the sending device via relay links; adaptively adjusting the format of the data packets to be sent to the receiving device via access links according to the power difference between the cooperative relay stations, in order to combine in the receiving device the data packets received from a sending device via a direct link and the data packets received from a cooperative relay station with low access link power via an access link, and to achieve spatial diversity between the cooperative relay stations; and sending the data packets to the receiving device via access links. The method and equipment of the present invention eliminate or reduce the power imbalance of the access links existing in the cooperative relay and maximize the diversity gain, thus improving wireless communications system performance.

Description

Method and equipment for cooperative relaying used in wireless communication system
Method and apparatus branch art field for cooperating relay in wireless communication system
Present invention relates in general to wireless communication system, more particularly, the present invention relate to the method and apparatus of cooperating relay in a wireless communication system.Background technology
In multi-hop wireless communication system, cooperating relay is the effective physical-layer techniques for obtaining diversity gain in a distributed way.The main thought of cooperating relay is that via node is considered as into Virtual intends antenna, so as to help lend some impetus to the radio communication of single source-destination pair by implementing two key characters of wireless medium.Two key characters of the wireless medium are its broadcast nature and obtain space diversity or the ability of spatial reuse.By in base station（BS cooperating relay technology) and/or between trunk desk (RS) is introduced, the performance of wireless communication system can be improved further.
Currently, cooperating relay solution common in multi-hop wireless communication system is that distributed space time block coding is used in cooperating relay（) and distributed spatial reuse STBC（SM ) .Because distributed STBC and SM transmits the data of set form, receiving terminal only needs to utilize channel information（The channel information transmits known reference signal by transmitting terminal and obtained）To be demodulated, and transmitting terminal is not need channel information, therefore they do not need feeding back channel state information（), CSI systematic function can thus be effectively improved without extra signaling consumption.
In order to make it easy to understand, Fig. 1 draws the illustrative example of the downlink spatial diversity of above-mentioned cooperating relay, wherein trunk desk RS1 and RS2 via equipment BS to RS1 and RS2 repeated link is sent by receiving packet（ S2, Si), and receiving device mobile station（MS) by receiving packet respectively via from RS1 and RS2 to MS access link
( -S2*, Si) and S2), so as to realize distributed STBC.Thus, it is possible to obtain array gain and cooperative reception diversity gain, and it is possible thereby to improve the transmission quality of access link. However, due to the difference of locus residing for base station and trunk desk, the multiple signals for being sent to mobile station from base station or multiple trunk desks will undergo different path losses, and this will cause the unbalanced power of reception signal at mobile station（That is, it is unequal）.Although suitable trunk desk can be selected to carry out relay transmission, remain difficult to avoid such situation from occurring.The unbalanced power of the reception signal will have influence on the acquisition of space diversity gain, especially when the unbalanced power for receiving signal reaches to a certain degree, possibly can not realize space diversity gain.
For example, in typical mobile environment, when path loss index is 4, distance is separated by two kilometers of MS and BS and distance is separated by between one kilometer of MS and RS, and the difference of access link power path loss is up to 12dB.When carrying out collaborative process between BS and RS, space diversity gain will almost completely lose, or even performance may further deteriorate.
Fig. 2 is emulated when signal to noise ratio SN is 4dB, and the diagram of influence of the unbalanced power to throughput performance tells the data rate that the amount of gulping down refers to transmit under cell frequency here
( bps/Hz ).It is can be seen that by the figure when the unbalanced power on two access link（Namely difference power）When reaching 12dB, it is about 83% to tell the amount of gulping down loss, and this is almost identical with the multi-hop relay without cooperation.
The unbalanced influence of Wei Minus small-powers, has to select suitable via node according to existing technical scheme, i.e. selection has to the node of MS same distances to realize collaborative process, and this will greatly limit the application scenarios of cooperating relay technology.
Therefore, need a kind of method and apparatus for cooperating relay in wireless communication system, the unbalanced power on the access link in the presence of cooperating relay can be reduced or eliminated in it, and substantially realizes diversity gain, so as to improve the performance of wireless communication system.The content of the invention
In view of there is above mentioned problem in prior art, it is specific as follows the invention provides new solution：
It is used for the method for cooperating relay in wireless communication system there is provided a kind of according to an aspect of the present invention, methods described includes：Received via repeated link from the packet for sending equipment transmission；Difference power between the trunk desk of root Ju cooperation, is adaptively adjusted via access chain Road is sent to the data packet format of receiving device, to merge the packet received via direct road power relay platform at receiving device, and realizes the space diversity between the trunk desk of cooperation；And send the packets to receiving device via access link.
It is used for the trunk desk of cooperating relay in wireless communication system there is provided a kind of according to another aspect of the present invention, the trunk desk includes：Reception device, for being received via repeated link from the packet for sending equipment transmission；Adjusting apparatus, for the difference power between the trunk desk according to cooperation, it is adaptively adjusted and merges the packet group that receiving device is sent to via access link with the packet received via access link from the low access link power relay platform cooperated, and realizes the space diversity between the trunk desk of cooperation；Dispensing device, for sending the packets to receiving device via access link.
It is used for the method for cooperating relay in wireless communication system there is provided a kind of according to another aspect of the present invention, methods described includes：Received via direct link from the packet for sending equipment transmission and the packet sent from the trunk desk of cooperation is received via access link；The packet received via direct link is merged with the packet received via access link from the low access link power relay platform cooperated, the trunk desk wherein cooperated is according to mutual difference power, the data of receiving device will be sent to according to another aspect of the present invention via access link by being adaptively adjusted, a kind of receiving device for cooperating relay in wireless communication system is provided, the receiving device includes：Reception device, for being received via direct link from the packet for sending equipment transmission and receiving the packet sent from the trunk desk of cooperation via access link；Merge device, for the packet received via direct link to be merged with the packet received via access link from the low access link power relay platform cooperated, the trunk desk wherein cooperated is adaptively adjusted the space diversity between the trunk desk by the data packet format of receiving device is sent to via access link to realize the merging and cooperation according to mutual difference power.
According to another aspect of the invention there is provided a kind of wireless communication system of use cooperating relay, including：Equipment is sent, for sending packet to receiving device via direct link With via repeated link packet is sent to trunk desk；The trunk desk of cooperation, for being received via repeated link from the difference power sent between the packet of equipment and the trunk desk according to cooperation, the data packet format by receiving device is sent to via access link is adaptively adjusted, to realize the packet merging at receiving device and the space diversity of the trunk desk cooperated；Receiving device, for the Shuo Ju Fen Group received via direct link and the number Ju packet received from the low access link power relay platform that cooperates to be merged so that reed obtains identical access link power between access link.
By implementing method provided by the present invention, trunk desk, receiving device and wireless communication system, the unbalanced power on the access link in the presence of cooperating relay can be reduced or eliminated, and diversity gain is substantially realized, so as to improve the performance of wireless communication system.Brief description of the drawings
The following detailed description to non-limiting example is read by referring to accompanying drawing, other features, objects and advantages of the invention will become more apparent upon.In the accompanying drawings, identical and similar reference represents same or analogous device or method step, wherein：
Fig. 1 is the diagram of the example for the downlink spatial diversity for schematically showing cooperating relay；Fig. 2 is the diagram for the influence for schematically showing the unbalanced power of access link in cooperating relay to throughput performance；
Fig. 3 is to show to be used for the flow chart of the method for cooperating relay in wireless communication system according to one embodiment of the present invention；
Fig. 4 is to show to be used for the block diagram of the trunk desk of cooperating relay in wireless communication system according to one embodiment of the present invention；
Fig. 5 is to show to be used for the flow chart of the method for cooperating relay in wireless communication system according to one embodiment of the present invention；
Fig. 6 is to show to be used for the block diagram of the receiving device of cooperating relay in wireless communication system according to one embodiment of the present invention；
Fig. 7 is the detail flowchart for schematically showing adaptive cooperation relay transmission in the downlink according to an embodiment of the invention；
Fig. 8 be show according to adaptive STBC collaboration method proposed by the present invention with without cooperating The Packet Error Ratio of multi-hop relay and distribution STBC（BLER) the diagram of performance comparision；Fig. 9 is to show to encode (SFBC) and the diagram of distribution SFBC BLER performance comparisions according to the adaptive space frequency chunks of another embodiment of the invention；
Figure 10 is the simulation deployment figure for showing to be encoded according to the adaptive space frequency chunks of another embodiment of the invention；And
Fig. 11 is to show that the systematic function based on distributed SFBC methods and adaptive cooperation trunking method proposed by the invention compares figure.Embodiment
Embodiments of the present invention are described in detail below in conjunction with accompanying drawing.
With reference first to Fig. 3, it shows to be used for the flow chart of the method for cooperating relay in wireless communication system according to one embodiment of the present invention.As shown in FIG., in step 301, received via repeated link from the packet for sending equipment transmission.In step 302, according to the difference power between the trunk desk of cooperation, it is adaptively adjusted the data packet format by receiving device is sent to via access link, to be merged at receiving device via direct link from the packet for sending equipment reception with the packet received via access link from the low access link power relay platform cooperated, and realize the space diversity between the trunk desk of cooperation.And in step 303, Shuo Ju Fen Group are sent to the receiving device via access link.
Fig. 4 is to show to be used for the block diagram of the trunk desk of cooperating relay in wireless communication system according to one embodiment of the present invention.The trunk desk includes reception device 401, adjusting apparatus 402 and dispensing device 403.Wherein, reception device 401 is used to receive from the Shuo Ju Fen Group for sending equipment transmission via repeated link.The difference power that adjusting apparatus 402 is used between the trunk desk according to cooperation, it is adaptively adjusted the data packet format by receiving device is sent to via access link, to merge at receiving device via direct link from the packet row for sending equipment reception, and realize the space diversity between the trunk desk of cooperation.Dispensing device 403 is used to Shuo Ju Fen Group are sent into the receiving device via access link.
Fig. 5 is to show to be used for the flow chart of the method for cooperating relay in wireless communication system according to one embodiment of the present invention.As shown in FIG., in step 501, via direct chain Road receives from the packet for sending equipment transmission and the packet sent from the trunk desk of cooperation is received via access link.Then, in step 502, the packet that receipts are received via direct link is entered into ^ to merge.' wherein, the trunk desk of cooperation is adaptively adjusted the space diversity between the trunk desk by the data packet format of receiving device is sent to via access link to realize the merging and cooperation according to mutual difference power.
Fig. 6 is to show to be used for the block diagram of the receiving device of cooperating relay in wireless communication system according to one embodiment of the present invention.As shown in FIG., the reception, which is set, includes reception device 601 and merging device 602.Wherein, reception device 601 is used to receive from the packet for sending equipment transmission via direct link and receive the packet sent from the trunk desk of cooperation via access link.Merging device 602 is used to merge the data received via direct link point.Wherein, the trunk desk of cooperation is adaptively adjusted the space diversity between the trunk desk by the data packet format of receiving device is sent to via access link to realize the merging and cooperation according to mutual difference power.
According to above-mentioned multiple embodiments of the present invention, while there is provided a kind of wireless communication system of use cooperating relay, its functional block diagram is similar to shown in Fig. 1, therefore is omitted herein, and the wireless communication system includes：Equipment is sent, for sending packet to trunk desk to receiving device transmission packet and via repeated link via direct link.The trunk desk of cooperation, for being received via repeated link from the difference power sent between the packet of equipment and the trunk desk according to cooperation, the data packet format by receiving device is sent to via access link is adaptively adjusted, to realize the Shuo Ju Fen Group merging at receiving device and the space diversity of the trunk desk cooperated；And receiving device, merge to obtain identical access link power between access link for the number Ju packet by the packet received via direct link and from the low access link power relay platform reception cooperated.
Fig. 7 is the detail flowchart for schematically showing adaptive cooperation relay transmission in the downlink according to an embodiment of the invention；
In Bu Sudden 70, equipment BS is sent by repeated link to trunk desk RS1 and the RS2 broadcast data packets being related in collaborative process（ S2,S!) and receiving device MS pass through it is straight Chain link road is received and storage comes from BS these packets without these packets are entered with Chu equilibrium and decoding process.
Then, in step 71 and 72, the channel quality feedback information of its access link between RS1 and RS2 is sent to RS1 and RS2 by MS respectively, and the channel quality feedback information is estimated according to from RS1 and RS2 previously received signal.Received signal refers to MS in the reference signal received by previous time slot or former frame herein before, by forgive channel information that reference signal estimates can as this time slot channel information, because in the environment that communication channel Slow changes slowly, adjacent time-slots may be considered constant.Simultaneously in above-mentioned steps, RS1 and RS2 are to being demodulated and decoding from the BS data-signals received.
In step 73 and 74, RS1 and RS2 determine respective channel link qualities situation according to channel quality feedback information mentioned above respectively（I.e. respective access link power level）, and its Shuo Ju Fen Group form that will be transmitted to MS will be determined adaptively as follows.I.e., when there is difference power between R_S1 and RS2 access link, the RS of low access link power transmits the number with the packet same format for being sent to MS on direct link with BS according to a point Group in step 75 or 77 to MS, i.e. packet（S^S^ o and there is the RS of high access link power to transmit identical data content to MS in step 76 or 78 for another, but the data packet format is adaptively changed（Symbol and conjugater transformation）, i.e. Shuo Ju Fen Group（ S^-S^ ) .So as to which the data packet format of the transmission from RS1 and RS2, which will be formed, meets the code word of space diversity coding childbirth then.Preferably, the code word of STBC/SFBC coding rules is met.
Finally, at step 79, MS is received after RS1 and RS2 packet from access link, and the existing STBC/SFBC detection schemes moved by using plan and control micromodification are (that is, in following formula（7) item is added in）, by the packet received from the low RS of access link power with previously being merged through direct link from the BS packets received（Preferably, maximum-ratio combing）, thus the relatively low RS of power access power is compensated, so as to substantially obtain the diversity gain of the STBC/SFBC on repeated link, then improves the performance of wireless communication system.
Here need to be that the method for being pointed out that the present invention is suggested above is not limited to use in two Cooperating relay is realized after platform RS, it can be extended to the cooperation between BS and RS, or for the cooperation between up-link or multiple transmitting stations of downlink.For example, when carrying out cooperating relay in the uplink direction, it is MS to send equipment, and receiving device is the technology of changing, and is also strengthened existing distributed STBC.
Fig. 7 embodiment is further described in the way of being expressed below by formulation.Because Alamouti codes are widely used STBC in wireless communication system, therefore perform between RS1 and RS2 Alamouti codes.
According to Fig. 7, after its packet is sent to MS by BS via direct link, received signal can be expressed as below：
1 1 1 (1)
y2 = h2s2 + n2
Wherein A and be packet in continuous two time slots sent, and A2It is the respective channel status information from B S to MS, and ^ and be the additive white Gaussian noise received twice.Without loss of generality, equation（1) it can be written as：
V Λ
+ (2)
、 0 —h2* one is enteredS. 2 n2
Here " * " represents conjugater transformation.When selecting RS1 and RS2 or BS and RS to send packet to cooperate with to obtain diversity gain, improved Alamouti codes will be used,
Alamouti codes.Existing Alamouti is the coding based on direction in space for two antenna STBC codings, i.e. the 1st antenna is sent（S1 ;-S2*) the 2nd antenna transmission（S2, S^), different from the existing Alamouti coding methods based on direction in space, after the data format sent on direct link is considered, improved Alamouti codes proposed by the invention are in the 1st antenna（That is at RS1）Send packet（ S S2) and in the 2nd antenna（That is at RS2）Send（ ), i.e., based on time orientation come coded data packet.As can be seen that it is assumed herein that RS1 access link power is relatively low, thus maintain and BS identical data packet formats.So as to which the signal received by MS from access link can be written as：
(3) Wherein A and be from the channel condition information on RSI and RS2 to MS access link respectively, it is assumed here that there is difference power therebetween in RS1 and RS2, and RS1 to MS access link power is low, therefore it sends signal, s respectively in continuous two time slots2 ) aRS2 to MS access link power is high, therefore it sends signal Jing Guo format conversion correspondingly respectively in continuous two time slots, equation（3) it can be expressed as below：
Merge equation（2) and（4), it can obtain
Equation（5) it can be represented with following matrix form：
y =hs+n (6)
From equation（5) as can be seen that channel state information matrix h reaches the diversity gain of three ranks, and in the existing system shown in Fig. 1, distributed STBC is only capable of obtaining the diversity gain of two ranks, and this increased first order gains comes from equation（2) merge with the RS1 data diversities transmitted, such as maximum-ratio combing（MRC ) .By increasing the power of this low access link of diversity order gain improving to eliminate unbalanced power.Similar to what is be previously mentioned in STBC algorithms, it is assumed that channel is constant between corresponding two continuous slots on direct link, utilizes existing STBC detection algorithms, peer-to-peer（6) h* is multiplied by, the packet of transmission can recover as follows.
Due to using the signal sent on direct link, passing through maximum-ratio combing（MRC the time diversity gain) obtained compensates for the RS with low access power, so that the power of the equal power of RS arrival or substantial equilibrium, it is possible thereby to substantially obtain the diversity gain between the STBC on repeated link.
Due to consideration that MRC, RS or BS with low access link power send the packet with coded format identical with the BS on direct link.Therefore, as receiving device MS The channel quality information of two access link is fed back to RS（Such as signal to noise ratio snr) when, RS1 and RS2 itself will adaptively determine STBC coded formats, i.e., RS with low access link power is sent in the continuous slot of access link and another RS with high access link power sends (- ^, ^ in the continuous slot of access link.
Use analysis above, emulation can be made to the performance of adaptive cooperation relay transmission scheme, and for comparison purposes, to also being emulated without cooperation multi-hop relay and distribution STBC based on OFDM downlink systems, wherein in the simulation, cooperation is performed between BS and RS.Table 1 gives the parameter setting of emulation.
Fig. 8 simulation result is illustrated in the case of above-mentioned three kinds, Packet Error Ratio（BLER) the comparison of performance.As is expected, when path loss index is 4, difference power is about 13dB.Due to the poor direct link from BS to MS, the performance that distributed STBC will deteriorate in low SNR regions, but in high SNR regions, distributed STBC can obtain part diversity gain, therefore be compared to as BLER=l x l 0-3When multi-hop relay, its performance can be enhanced about ldB.Due to adaptively compensating for imbalance power by using time diversity gain, difference power is reduced.Therefore, it is compared to as BLER=l x l (T3When distributed STBC performance, the performance of method proposed by the invention can improve about 3.8dB.
Adaptive cooperation scheme proposed by the invention can be extended in the cooperating relay wireless communication system based on SFBC. Similar to the description of the embodiment for STBC, the use of method proposed by the invention in the cooperating relay based on SFBC is described below by the mode of formulation expression.Similarly, after BS sends its packet on direct link, the packet that MS is received can be expressed as below for： γ^ + \) = + \)3^ + ή + η^ + ί) (8)Wherein k represents the subcarrier in ofdm system, and s2 t+L) it is the packet that sends in two continuous subcarrier k and k+1,；^^ and ^^+) be direct link from BS to MS respective channel status information, and The additive white Gaussian noise of secondary reception.Without loss of generality, equation（8) it can be written as：
Wherein " * " represents conjugater transformation.Packet is sent when two RS or BS and RS are chosen so as to collaboration, so that when obtaining diversity gain.Similar to the description in above distribution STBC, improved Alamouti codes can also be used, the method proposed is based on frequency direction rather than direction in space come coded data packet, i.e. signal received from two subcarriers of the access link of cooperation MS is
y3(k) = hll(k)sl(k)-hl2(k 2(k+l)+n}(k)
(10) wherein ku(k) it is from the trunk desks of two cooperations to MS channel condition information respectively with W on the access link sub-carriers k cooperated.Assuming that the channel condition information of continuous two subcarriers is constant, i.e. hl(k) = h2(k+l),hu(k)=hl](k + i),hl2(k) = hll(k+l), then equation
(10) it can be expressed as below：
Similarly, the SFBC data sent on access link are merged to the data received on direct link,
Similar to what is derived above, equation（12) matrix form that can be expressed as: y = hs + n (13)
Based on reverting to：
Cooperating relay based on SFBC is emulated.The parameter setting of emulation goes out as given in table 1.As can be seen from Figure 9, as BLER=2xl (T3When, by compensating unbalanced power, distributed SFBC is compared to, performance about improves 4.0dB.
In order to verify proposed scheme, systematic function is also emulated.Figure 10 depicts the simulation deployment figure of system.The network of sectorized cells is formed with 7 cells and each cell includes 3 sectors.In each sector, two trunk desks apart from the radius of societies of BS 2/3 are deployed with.Simulation parameter is shown in table 2.
Table 2
Figure 11 shows simulation result.It can be seen that in distributed SFBC systems 40 % MS Signal to Interference plus Noise Ratio（SINR) it is 15dB, and the % of method 40 proposed by the invention MS SINR reaches 18dB, this explanation performance gain is about 3dB, because mobile subscriber is located at different positions, path-loss difference statically changes, but in each position, adaptively power back-off provides improved SINR gains, therefore the performance of system will be enhanced.
Multiple embodiments of the present invention are described above in association with accompanying drawing.It should be noted that in order that the present invention is easier to understand, it is more specifically some ins and outs that are known and being likely necessary for realization of the invention for those skilled in the art that above description, which is eliminated,.
The present invention can take complete hardware to realize, complete software is realized or include the form of the realization of hardware cell and software unit simultaneously.In a preferred embodiment, the present invention is implemented in software, and the software includes but is not limited to firmware, resident software, microcode etc..
The purpose for providing the specification of the present invention is in order to illustrate and describe, rather than for exhaustive or limit the invention to disclosed form.For one of ordinary skill in the art, many modifications and changes will be apparent from.
Therefore; select and describe embodiment be in order to preferably explain the present invention principle and its practical application; and understand those of ordinary skill in the art; on the premise of essence of the present invention is not departed from, all modifications and change are each fallen within protection scope of the present invention defined by the claims.

Claims (17)

  1. Claims
    1. a kind of be used for the method for cooperating relay in wireless communication system, methods described includes：Received via repeated link from the packet for sending equipment transmission；
    According to the difference power between the trunk desk of cooperation, it is adaptively adjusted the data packet format by receiving device is sent to via access link, to be merged at receiving device via the direct link from the packet for sending equipment reception with the packet received via the access link from the low access link power relay platform cooperated, and realize the space diversity between the trunk desk of cooperation；And
    Shuo Ju Fen Group are sent to the receiving device via access link.
    2. according to the method described in claim 1, wherein determining the high access link power relay platform and low access link power relay platform that there is difference power according to the channel quality feedback information received from receiving device.
    3. according to the method described in claim 1, it is wherein described to be adaptively adjusted including keeping the low access link power relay platform constant from the data packet format of the transmission equipment reception via repeated link, and adaptively change the data packet format that high access link power relay platform is received via repeated link from the transmission equipment, to be sent to the criterion that the data packet format of the receiving device meets space diversity coding from the trunk desk of cooperation.
    4. method according to claim 3, wherein space diversity coding is space-time block coding or Space Frequency Block Coding.
    5. method according to claim 4, wherein the space-time block coding or the Space Frequency Block Coding are the requirements for meeting the data packet format sent via access link
    Alamouti codes.
    6. a kind of be used for the trunk desk of cooperating relay in wireless communication system, the trunk desk includes：
    Reception device, for being received via repeated link from the packet for sending equipment transmission；Adjusting apparatus, for the difference power between the trunk desk according to cooperation, is adaptively adjusted the data packet format by receiving device is sent to via access link, so as at receiving device The packet that receives of low access link power relay platform merge, and realize the space diversity between the trunk desk of cooperation；And
    Dispensing device, for sending the packets to the receiving device via access link.
    7. trunk desk according to claim 6, wherein the adjusting apparatus determines the high access link power relay platform and low access link power relay platform that there is difference power according to the channel quality feedback information received from receiving device.
    8. trunk desk according to claim 6, the data packet format that wherein described adjusting apparatus is used to keep the low access link power relay platform to receive from the transmission equipment via repeated link is constant, and adaptively change the data packet format that high access link power relay platform is received via repeated link from the transmission equipment, to be sent to the criterion that the data packet format of the receiving device meets space diversity coding from the trunk desk of cooperation.
    9. trunk desk according to claim 8, wherein space diversity coding is space-time block coding or Space Frequency Block Coding.
    10. trunk desk according to claim 9, wherein the space-time block coding or the Space Frequency Block Coding are the requirements for meeting the data packet format sent via access link
    Alamouti codes.
    A kind of 1 1. methods for cooperating relay in wireless communication system, methods described includes：Receive the packet sent from the trunk desk of cooperation；
    The packet received via direct link is merged with the packet received via access link from the low access link power relay platform cooperated, the trunk desk wherein cooperated is according to mutual difference power, and the solidifying of receiving device will be sent to via access link by being adaptively adjusted
    12. method according to claim 11, wherein there is identical number Ju packet format from the Shuo Ju Fen Group for sending the equipment packet received and being received from low access link power relay platform, and the packet received from high access link power relay platform has the data format for adaptively changing through the trunk desk and encoding criterion so as to the space diversity for the trunk desk for meeting cooperation.
    13. method according to claim 11, wherein described merge using maximum-ratio combing to the number received via direct link according to point Group and merged via the packet of low-power access link reception.
    14. a kind of be used for the receiving device of cooperating relay in wireless communication system, the receiving device includes：
    Reception device, for being received via direct link from the Shuo Ju Fen Group for sending equipment transmission and receiving the packet sent from the trunk desk of cooperation via access link；
    Merge device, for the packet received via direct link to be merged with the packet received via access link from the low access link power relay platform cooperated, the trunk desk wherein cooperated is adaptively adjusted the space diversity between access chain platform according to mutual difference power.
    15. receiving device according to claim 14, the number evidence that wherein described reception device is received from the packet of transmission equipment reception and from low access link power relay platform divides a Group to have identical data packet format, and has the data format for adaptively changing through the trunk desk and encoding criterion so as to the space diversity for the trunk desk for meeting cooperation from the packet of high access link power relay platform reception.
    16. receiving device according to claim 14, merge the packet that device received using maximum-ratio combing to the packet that is received via direct link and via low-power access link wherein described and merge.
    17. a kind of wireless communication system of use cooperating relay, including：
    Equipment is sent, for sending packet to trunk desk to receiving device transmission packet and via repeated link via direct link；
    The trunk desk of cooperation, for being received via repeated link from the difference power sent between the packet of equipment and the trunk desk according to cooperation, the Shuo Ju Fen Group forms by receiving device is sent to via access link are adaptively adjusted, to realize the packet merging at receiving device and the space diversity of the trunk desk cooperated；And
    Receiving device, for by the packet that is received via direct link with from cooperating Between identical access link power.
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Publication number Priority date Publication date Assignee Title
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CN106603431B (en) * 2016-12-15 2020-09-04 中国科学院沈阳自动化研究所 Industrial wireless network data scheduling method and device based on mixed key tasks

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