CN101841920A - Radio relay system and communication method for radio relay system - Google Patents
Radio relay system and communication method for radio relay system Download PDFInfo
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Abstract
The embodiment of the invention discloses a radio relay system. The system comprises a radio resource control (RRC) layer having a first control device used for coordinating a radio relay station to communicate with user equipment (UE) and a base station. The embodiment of the invention also provides a communication method based on the system at the same time. Through the configuration of related relay functions in the RRC layer of an air interface protocol stack in the embodiment of the invention, radio relay stations can control and regulate radio resources according to the network status while transferring uplink and downlink data so as to rationally utilize the radio network resources and improve the efficiency of data transmission. Meanwhile, the embodiment of the invention also discloses the radio relay system which is also used for realizing the technical effect.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly, relate to the communication means of a kind of wireless relay system and wireless relay system.
Background technology
Along with express network technology and development of multimedia technology, undergoing an unusual development of wireless network is swift and violent, in wireless network, realize that the transmission medium of terminal room communication mainly contains radio wave, infrared ray etc., because there is decay in radio wave, and frequency is high more, radio wave is fast more with range attenuation, so the high workload frequency will cause the coverage of base station in the network very limited, at this point, prior art has added radio repeater station in network, with the scope of increase system covering.
Radio repeater station communicates by air interface and base station, and transmits the data of terminal.Its maximum characteristics are that it does not need cable to be connected with network, therefore the flexibility of its laying is greater than the traditional base station, so under identical systematic function requires, as the coverage of system and throughput etc., the cost of building relay station is littler than building the base station, and more can save the laying time.Therefore, use relay station to obtain bigger covering with lower cost, these advantages also will enlarge the market demand of radio bandwidth access network.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: the wireless network such as LTE can't be supported relay function, and existing radio repeater station is applied in this class network, can't coordinate the communication between terminal and the base station.
Just control the data between relay station transfer portable terminal and the base station under a lot of situations simply, and along with the develop rapidly of wireless network, the complexity of wireless network is also more and more higher, interactive data quantity also increases day by day between network, and how utilizing radio repeater station reasonably to dispatch wireless network resource becomes the problem of needing solution at present badly.
Summary of the invention
In view of this, the embodiment of the invention provides the communication means of a kind of wireless relay system and wireless relay system, makes radio repeater station can dispatch wireless network resource.
The embodiment of the invention is achieved in that
A kind of wireless relay system comprises the radio resource control RRC layer, and described rrc layer comprises and is used to coordinate the first control device that described radio repeater station and user equipment (UE), base station communicate.
The embodiment of the invention also provides a kind of communication means of wireless relay system simultaneously, comprising: described wireless relay stands under the Coordination Treatment of rrc layer and communicates with terminal, base station.
Prior art is compared, the technical scheme that the embodiment of the invention provides has the following advantages and characteristics: the embodiment of the invention is carried out the configuration of relevant relay function by the radio resource control layer of protocol stack of the interface aloft, make the radio repeater station can be under the coordination of rrc layer control, Radio Resource is controlled and adjusted, realize communicating by letter with terminal and base station.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 comprises the protocol stack architecture figure of the air interface of relay function for prior art;
Fig. 2 is the structural representation of the first control device of the disclosed a kind of wireless relay system of the embodiment of the invention;
Fig. 3 is a kind of structural representation of the second control device of the disclosed a kind of wireless relay system of the embodiment of the invention;
Fig. 4 is the another kind of structural representation of the second control device of the disclosed a kind of wireless relay system of the embodiment of the invention;
Fig. 5 is the structural representation of the 3rd control device of the disclosed a kind of wireless relay system of the embodiment of the invention;
Fig. 6 is the structural representation of the 4th control device of the disclosed a kind of wireless relay system of the embodiment of the invention;
Fig. 7 selects flow chart for the disclosed embodiment of the invention of the embodiment of the invention is disclosed based on carrying out functional network topology in the communication means of above-mentioned wireless relay system;
Fig. 8 is disclosed based on the flow chart that carries out resource request and distribution in the communication means of above-mentioned wireless relay system for the disclosed embodiment of the invention of the embodiment of the invention;
Fig. 9 is disclosed based on the flow chart that carries out Route Selection in the communication means of above-mentioned wireless relay system for the disclosed embodiment of the invention of the embodiment of the invention;
Figure 10 is for inserting the flow chart of congested control in the disclosed communication means based on above-mentioned wireless relay system of the disclosed embodiment of the invention of the embodiment of the invention;
Figure 11 is the disclosed flow chart of setting up based on the radio bearer that carries out repeated link and access link in the communication means of above-mentioned wireless relay system of the disclosed embodiment of the invention of the embodiment of the invention;
Figure 12 is disclosed based on the flow chart 1 of realizing the feedback relay function in carrying out in the communication means of above-mentioned wireless relay system for the disclosed embodiment of the invention of the embodiment of the invention;
Figure 13 is disclosed based on the flow chart 2 of realizing the feedback relay function in carrying out in the communication means of above-mentioned wireless relay system for the disclosed embodiment of the invention of the embodiment of the invention;
Figure 14 be the disclosed embodiment of the invention of the embodiment of the invention disclosed based on UE in the communication means of above-mentioned wireless relay system based on the non-competing figure of access process at random.
Embodiment
For quote and know for the purpose of, hereinafter the technical term of Shi Yonging, write a Chinese character in simplified form or abridge and be summarized as follows:
CQI:Channel Quality Indicator, that is: CQI;
CN:Core Network, that is: core net;
C-RNTI:Cell Radio Network Temporary Identifier, that is: cell-level Radio Network Temporary Identifier;
DRX:Discontinuous Reception, that is: discontinuous reception;
DTX:Discontinuous Transmission, that is: discontinuous transmission;
GSM:Global System for Mobile communications, that is: global system for mobile communications;
ARQ:Automatic Error Request, that is: automatic request retransmission;
LTE-A:Long Term Evolution-Advanced, that is: advanced Long Term Evolution;
MAC:Medium Access Control, that is: medium access control;
PDCP:Packet Data Convergence Protocol, that is: PDCP;
RACH:Random Access Channel, that is: Random Access Channel;
RAN:Radio Access Network, that is: Radio Access Network;
RB:Radio Bearer, that is: radio bearer;
RLC:Radio Link Protocol, that is: Radio Link control;
RRC:Radio Resource Control, that is: Radio Resource control;
SNR:Signal Noise Ratio, that is: signal to noise ratio;
SINR:Signal-to-Interference-and-Noise Ratio, that is: Signal to Interference plus Noise Ratio;
SNDR:Signal to Noise-plus-Distortion Ratio, that is: signal and noise distortion ratio;
TA:Time Alignment, that is: time adjustment;
UE:User Equipment, that is: subscriber equipment;
WCDMA:Wideband Code Division Multiple Access, that is: Wide band Code Division Multiple Access inserts.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 1 is the protocol stack architecture figure of present air interface, can obtain by Fig. 1, in the protocol stack of the interface framework, comprise physics (PHY) layer, medium access control (MAC) layer, Radio Link control (RLC) layer, PDCP (PDCP) layer and Radio Resource control (RRC) layer aloft.Wherein, the PHY layer has functions such as modulating-coding, spread spectrum, the transmission channel of finishing channel be multiplexing; The MAC layer mainly contains functions such as finishing access control, the transmission channel mapping of logic channel road, scheduling of resource, mixing re-transmission; Rlc layer mainly contains finishes the re-transmission model selection, automatically functions such as repeat requests, encryption; The PDCP layer mainly contains the function that the packet of finishing different-format converges conversion; Rrc layer then mainly contains the function of finishing RRM.
The disclosed wireless relay system of the embodiment of the invention is a sandwich construction, comprise PHY layer, MAC layer, rlc layer, PDCP layer and rrc layer, as Fig. 2, wherein, rrc layer comprises first control device, and this first control device can comprise any one or the combination in any in the following functional unit:
Network topology selected cell 21 is used for: carry out network topology and select, and determine whether to connect with the adjacent radio repeater station of described radio repeater station according to selection result; After being provided with network topology selected cell 21, place RS can initiate network topology to eNB and select message, receive eNB and select acknowledge message in the network topology of selecting to return behind the topology of networks, if it is P2P that eNB selects topology of networks, then described RS initiates to connect the request of foundation to adjacent R S.
Resource request and allocation units 22 are used for: ask the base station assigns resource, and be this UE Resources allocation according to the UE request; Specifically, with the semi-persistent scheduling is example, after the RS at resource request and allocation units 22 places and eNB connect, initiate resource request message to described eNB, described eNB is used for the communication of access link for this RS distributes a fixed resource piece, and informing described RS by resource allocation message, described RS be described UE dynamic assignment upstream or downstream resource dynamically according to the resource request message of UE, and by resource allocation message answer UE.
DRX/DTX dispensing unit 23 is used for: for repeated link and access link dispose DRX/DTX respectively; DRX/DTX dispensing unit 23 can be made up of DRX/DTX-u and DRX/DTX-e two parts, wherein DRX/DTX-e is responsible for the configuration of access link, for example, between RS and UE, only dispose DTX, and in MAC master's configuration information element the configuration its begin parameters such as side-play amount, cycle, DRX/DTX-u is responsible for the configuration of repeated link, for example only disposes DRX between RS and eNB, and in MAC master's configuration information element the configuration its begin parameters such as side-play amount, cycle.
In addition, can also tell this DRX/DTX dispensing unit 23 by eNB, DRX/DTX-e unit wherein carries out the relevant configuration of RN and/or UE, can also initiatively carry out the configuration of the relevant sleep parameters of UE by DRX/DTX-u after receiving the relevant parameter that eNB sends.
Access control unit 24 is used for: when the access request that receives UE, determine whether to accept the access request of described UE according to the loading condition of access link and repeated link; After being provided with access control unit 24, if wherein arbitrary link congestion, then RS can insert request by this unit refusal UE, and replys to connect and set up refuse information; If all links are not congested, then RS can accept the access request of described UE by this unit.
RB sets up unit 25, is used for: repeated link finish and the base station between RB set up, initiate RB at access link to UE and set up request;
Need to prove, a kind of concrete form of first control device can be to comprise above all unit, wherein, earlier carry out access control, set up unit 25 by RB then and carry out RB and set up process by access control unit 24, set up in the process at this, the RB that UE initiates sets up in the request can carry resource allocation request, so, can finish resource request and batch operation by resource request and allocation units 22, after resource request and batch operation are finished, carry out Route Selection by Route Selection unit 26.
In addition, set up in the process carrying out RB, RB sets up unit 25 and initiates radio bearer foundation request to eNB, and the radio bearer that reception eNB returns is set up request responding message, carry the DRX/DTX configuration parameter in this response message, afterwards, DRX/DTX dispensing unit 23 can be configured according to this configuration parameter.Certainly, also can initiate configuration, at this moment, then need not to set up and carry out after finishing at RB by the DRX/DTX-u in the DRX/DTX dispensing unit 23 to UE, can to set up process separate with RB.
This embodiment only rrc layer among the LTE is an example, in other similar network, also can use the present invention to realize similar functions.In the disclosed wireless relay system of other embodiment, in the MAC layer, be provided with second control device, as shown in Figure 3, described second control device can comprise any one or the combination in any in the following functional unit:
The first relay function unit 31 is used for: behind the downlink data that receives the base station transmission, transmit processing, downlink data after handling is sent to UE, and, behind the upstream data that receives the UE transmission, transmit processing, the upstream data after handling is sent to described base station;
The first two-way RACH unit 32 is used for: issues non-competing access lead and gives UE, and handle RACH access and the feedback contention-based solution information of described UE, and, send random access guiding message to the base station, and send the scheduled transmission parameter according to the base station answer.
Need to prove, when described second control device comprises the first relay function unit 31 and the first two-way RACH unit 32 simultaneously, handle RACH access and the feedback contention-based solution information of described UE earlier by the first two-way RACH unit 32, and, carry out work by the first relay function unit 31 according to after the base station answer transmission scheduled transmission parameter.
Need to prove, another version of second control device as shown in Figure 4, comprise the second relay function unit 41 and the second two-way RACH unit 42, the function of the function of the second two-way RACH unit 42 and the first two-way RACH unit 32 is basic identical, the second relay function unit 41 is used to make radio repeater station: behind the downlink data that receives the base station transmission, transmit processing, downlink data after handling is sent to UE, and return information is given described base station, and, behind the upstream data that receives the UE transmission, transmit processing, upstream data after handling is sent to described base station, and return information is given described UE.
In addition, in the disclosed wireless relay system of other embodiment, be provided with the 3rd control device at rlc layer, described the 3rd control device comprises any one or the combination in any in the following functional unit, only introduce the 3rd control device that comprises all functions unit below, as shown in Figure 5, comprising:
The 3rd relay function unit 51, be used for: behind the downlink data that receives the base station transmission, transmit processing, and the downlink data after will handling sends to UE, and return information gives described base station, and, behind the upstream data that receives the UE transmission, transmit processing, and the upstream data after will handling sends to described base station, and return information is given described UE.
In addition, in the disclosed wireless relay system of other embodiment, comprise the 4th control device at described PDCP layer, described the 4th control device comprises any one or the combination in any in the following functional unit, only introduce the 4th control device that comprises all functions unit below, as shown in Figure 6, comprising:
The 4th relay function unit 61 is used for transmitting processing behind the downlink data that receives the base station transmission, and the downlink data after will handling sends to UE, and, after receiving the upstream data that UE sends, transmit processing, and the upstream data after will handling sends to described base station.
Enhancement mode ciphering unit 62 is used to adopt the enhancement mode cryptographic algorithm that the interactive information between described radio repeater station and the base station is encrypted.
Need to prove that above-mentioned first control device, second control device, the 3rd control device and/or the 4th control device can be integrated in the same entity, such as, can be arranged in radio repeater station, can certainly be separate.
Meanwhile, the embodiment of the invention also provides a kind of communication means based on above-mentioned wireless relay system, and this method is mainly by being provided with new function at existing rrc layer, to coordinate communicating by letter between radio repeater station and terminal, base station.
Described Coordination Treatment comprises any one or the combination in any in the following operation:
The radio bearer of network topology selection, resource request and distribution, Route Selection, DRX/DTX configuration, congested control and repeated link and access link is set up.
Bottom describes in detail respectively to above-mentioned each operation:
1, network topology is selected
Fig. 7 shows radio repeater station and carries out the flow chart that network topology is selected, and concrete steps are as follows:
Step 701:RS1 sends network topology to base station (eNB) and selects request;
In this step, because this relay station disposes peer-entities communication (P2P) function, therefore network topology structure to be selected is tree type or P2P structure, and RS1 sends to eNB with network topology structure to be selected, is made a choice by eNB.
Step 702:eNB selects acknowledge message to be back to RS1 network topology;
If the network topology that RS1 receives selects confirmation to represent that it is the P2P type that eNB selects topology of networks, then RS1 just can initiate to connect the request of foundation to its neighbors RS2.
Above-mentioned illustrated embodiment is that radio repeater station carries out a kind of situation that network topology is selected, and correspondingly, according to different network topology structures, radio repeater station will connect with different network nodes.
2, resource request and distribution
Fig. 8 is a radio repeater station to the base station requests resource and to the flow chart of UE Resources allocation, and concrete steps are as follows:
Step 801:RS sends resource request message to eNB;
In this step, RS can the quantity of UE and the situation that each UE uses Radio Resource be come to eNB application Radio Resource down according to self radio resource operating position and its.
The resource request message that step 802:eNB sends according to RS is that RS distributes a fixed resource piece, is used for the communication of access link, and to RS down distributing resource assignment messages;
UE under the step 803:RS sends resource request message to RS;
Step 804:RS dynamically is UE distribution upstream or downstream resource from the fixed resource piece that distribution obtains, and resource allocation message is returned to UE.
Above illustrated embodiment is that RS adopts semi-static mode to carry out resource request and configuration, meanwhile, RS also can adopt dynamic mode to carry out the request and the configuration of resource fully, be that RS needn't apply for a fixing Resource Block to eNB, but can dynamically also further distribute to needed UE according to the operating position of UE resource under it to eNB application resource.
3, Route Selection
UE and eNB between when carrying out the transmission of data, can finish by direct link, also can carry out forwarding of data by radio repeater station, select any bar link and study carefully election contest, generally be that signal quality according to each bar link decides, the specific embodiment of the invention is by disposing routing function in the trunk module of rrc layer, this function can be measured RS to the signal quality of repeated link, and measurement result reported eNB, simultaneously, UE measures the signal quality of the direct link of access link, and with the measurement result reporting base station, Route Selection is carried out according to these two measurement results in the base station.Fig. 9 is for realizing the flow chart of routing function, and concrete steps are as follows:
Step 901:RS measures the signal quality of repeated link;
Measurement result after step 902:RS will measure the signal quality of repeated link reports eNB;
Step 903:UE measures the signal quality of access link and direct link;
Measurement result after step 904:UE will measure the signal quality of access link and direct link reports eNB;
In above-mentioned several steps, also can be that UE measures relevant link prior to RS and reports, perhaps both measure simultaneously and report, and do not have clear and definite restriction here.
Step 905:eNB carries out Route Selection according to the reported result of RS and the reported result of UE according to certain algorithm;
In this step, when the signal quality of relaying link and access link is better than direct link, then the transfer of data between eNB and the UE will be carried out relaying by RS, when if the direct link signal quality is better than repeated link and access link, then can directly carries out the transmission of data between eNB and the UE and need not through RS.
Step 906: RS and UE are handed down to the result of Route Selection in the base station.
4, DRX/DTX configuration
Rrc layer in above protocol stack of the interface aloft carries out simultaneously, also can disposing the DRX/DTX function on this basis about the functional configuration to the management of Radio Resource and scheduling:
Wherein, the DRX/DTX configuration feature is embodied by DRX/DTX-u and DRX/DTX-e two parts functional entity, RS uses different DRX/DTX configurations at repeated link and access link, be exactly specifically, DRX/DTX-u is mainly used in the configuration of being responsible for access link, for example between RS and UE, can only dispose DTX, and in MAC master's configuration information element the configuration its begin parameters such as amount of bias, cycle; And DRX/DTX-e is mainly used in the configuration of being responsible for repeated link, for example can only dispose DRX between RS and base station, and disposes parameters such as its amount of bias, cycle in MAC master's configuration information element.
5, access control
The specific embodiment of the invention is further carried out the configuration of access control function at rrc layer, this function makes RS after the access request of receiving UE, whether allow this UE to insert according to the loading condition decision of access link and repeated link at that time, the flow chart that Figure 10 carries out access control for RS, concrete steps are as follows:
The request message that step 1001:UE connects to the RS initiation;
Step 1002:RS monitors the loading condition of access link and repeated link, and whether fair this UE inserts according to the monitoring result decision;
In this step,, then to refuse the access request of this UE if RS monitors access link or the arbitrary link load of repeated link is overweight.Wherein, the access link of RS monitoring and the loading condition of repeated link, it specifically can be the up link that monitoring UE arrives RS, it is up access link and RS up link to the base station, be relay uplink, loading condition, wherein, the loading condition of the up access link of RS monitoring specifically can be detected by this RS and obtains; The loading condition of the relay uplink of RS monitoring then can be to send to RS by the base station.
RS can also monitoring base station to the down link of RS, i.e. downlink relay link, and RS is to the down link of UE, promptly descending access link, loading condition, wherein, the loading condition of downlink relay link can be obtained by the RS detection; The loading condition of descending access link then can be informed RS by UE.
Step 1003:RS issues the determination result that whether allows its access to UE.
6, the radio bearer of repeated link and access link is set up
Carry out the configuration that radio bearer (RB) is set up function at rrc layer, the function that the radio bearer that then can make RS have processing repeated link and access link is set up, Figure 11 carries out the flow chart that radio bearer is set up for RS, and concrete steps are as follows:
Step 1101:RS initiates radio bearer to eNB and sets up request, and the radio bearer that reception eNB returns is set up request responding message; Carry the DRX/DTX configuration parameter in this response message, the functional unit (as the DRX/DTX dispensing unit of above-mentioned components of system as directed) of being responsible for carrying out the DRX/DTX configuration afterwards can be configured according to this configuration parameter, perhaps initiates configuration to UE by the DRX/DTX-u in the DRX/DTX dispensing unit.
Step 1102:RS initiates radio bearer to UE and sets up request, and receives the response message that radio bearer that UE returns is set up request message.
Above functional configuration is all carried out in rrc layer, and purpose is in order to improve RS in the function aspect RRM and the scheduling, to make whole system can more reasonably utilize wireless network resource in data transmission procedure, improving the efficient of transfer of data.Simultaneously, each layer of other of air interface protocols plays different separately use respectively in whole data transmission procedure, therefore in other corresponding which floor be correlated with configurations of relay function, can further improve wireless relay and stand in every function in the wireless network data transmission course, thereby reach efficient and the fail safe that improves the wireless network data transmission.
Wherein, for the PDCP layer; the front had been done simple the introduction; the major function of this layer is that the datagram of finishing different-format converges conversion; be added into trunk module at this layer; except that realizing the basic relay function of radio repeater station; embodiment provided by the present invention has also disposed the enhancement mode encryption function in the PDCP layer; because RS is responsible for the transfer work of data between all UE under it and the eNB; therefore need the higher data fail safe; so after in the PDCP layer, having disposed the enhancement mode encryption function, can effectively protect data transmission safety between RS and the eNB.
In addition, the major function for following one deck (being rlc layer) of PDCP is to finish to retransmit model selection, repetitive requests and encryption etc. automatically.The optional feedback relay function of configuration in this layer can make RS send the affirmation feedback message to base station and UE simultaneously in the process of interim data, makes base station and UE can know the state that has transmitted data.Figure 12 is RS realizes the feedback relay function in the process of interim data a flow chart, and concrete steps are as follows:
Step 1201:eNB issues data by down link to RS;
The down link data that step 1202:RS reception eNB issues is also done to transmit and is handled;
Step 1203:RS sends to eNB and confirms feedback message, with the state notifying eNB of received downlink data;
Step 1204:RS will give UE through transmitting the data distributing of handling.
So far, RS has finished once the transfer to down link data, and sends to eNB in the transfer process and confirm feedback message, makes eNB can in time understand the state of the data of sending, so that follow-up associative operation; When RS needed the data of transfer up link, flow process was similar, as shown in figure 13, comprising:
Step 1305:UE sends data by up link to RS;
Step 1306:RS receives the uplink data of UE transmission and does to transmit and handle;
Step 1307:RS sends to UE and confirms feedback message, with the state notifying UE of received upstream data;
Step 1308:RS will send to the base station through transmitting the data of handling.
So far, RS has finished once the transfer to uplink data, and sends to UE in the transfer process and confirm feedback message, makes UE can in time understand the state of the data of sending, so that follow-up associative operation.
In data transmission procedure, because the generation that the network equipment breaks down or network produces situation such as congested, can produce makeing mistakes or losing of data message, so just need the recipient affirmation have message make mistakes or the situation of losing under, the message that retransfers and make mistakes or lose to the transmit leg request.The specific embodiment of the invention has just disposed automatic request retransmission (ARQ) switching function in rlc layer, this function makes RS when transfer up-downgoing data, have automatic request retransmission function, promptly RS can ask transmit leg to resend the message of makeing mistakes after receiving error message.Simultaneously, in order to reduce the number of times that message retransmits, improve the efficient in the data transfer procedure, if there are a plurality of repeated links between the one piece of data link, can also adopt automatic request retransmission (HARQ) mode of mixing between then each of repeated link jumped, be that the mistake of transfer of data surpassed when setting scope between each of repeated link jumped, just carry out the re-transmission of error message, but final jump at whole repeated link, the RS of this final jump need open the ARQ function, has the ARQ function to realize whole repeated link, like this, both improve the efficient of transfer of data, also do not influenced the accuracy of transfer of data.
The major function of following one deck of rlc layer (MAC layer) is to finish access control, realize that logic channel is to the mapping of transmission channel, wireless resource scheduling etc.The specific embodiment of the invention disposes optional feedback relay function in this layer, make RS simultaneously can send feedback message to transmitting terminal in the process of transfer up-downgoing data, and this transmitting terminal can be UE, base station or adjacent RS etc.Basic procedure is here just no longer done and is given unnecessary details with shown in Figure 12 identical.
Simultaneously, the specific embodiment of the invention has also disposed random two-way access channel (RACH) function in the MAC layer, this functional module comprises RACH-u and RACH-e two parts, wherein, RACH-u is mainly used in the access of being responsible for UE, as shown in figure 14, this figure is UE based on the non-competing figure of access process at random:
Step 1401:RS issues a non-competing random access guiding to UE;
The non-competing random access guiding that step 1402:UE uses RS to issue inserts at random;
Step 1403:RS issues to insert at random to UE and replys message, carries contents such as random access guiding sign, time adjustment information, initial uplink resource allocation in this message.
Correspondingly, RACH-e is mainly used in and is responsible for inserting eNB, for example, can choose 5 bit random numbers and send random access guiding message to eNB in access procedure, sends RRC connection request message or RRC switch acknowledgment message etc.
Above illustrated embodiment all is to add corresponding functional modules in each layer of protocol stack of the interface aloft, make radio repeater station except function with transfer up-downgoing data, simultaneously can be according to the situation scheduling wireless network resource of network, rationally utilize Internet resources, improve the efficient of transfer of data, in addition, the encryption function that it added also can further improve safety of data transmission.
It will be understood by those skilled in the art that and to use many different technologies and in the technology any one to come expression information, message and signal.For example, the message of mentioning in the above-mentioned explanation, information can be expressed as voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or above combination in any.
The professional can also further recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (15)
1. a wireless relay system is characterized in that, the rrc layer of described wireless relay system comprises and is used to coordinate the first control device that radio repeater station and user equipment (UE), base station communicate.
2. the system as claimed in claim 1 is characterized in that, described first control device comprises any one or the combination in any in the following functional unit:
Functional network topology selected cell: be used to carry out network topology and select, and determine whether to connect with the adjacent radio repeater station of described radio repeater station according to selection result;
Resource request and allocation units: be used to ask the base station assigns resource, and be this UE Resources allocation according to the UE request;
The discontinuous transmission of discontinuous reception DRX/ DTX dispensing unit: be used to repeated link and access link to dispose DRX/DTX respectively;
Access control function: be used for when the access request that receives UE, determining whether to accept the access request of described UE according to the loading condition of access link and repeated link;
Resource Block RB sets up the unit: be used for repeated link finish and the base station between RB set up, initiate RB at access link to UE and set up request;
The Route Selection unit: be used for the signal quality of access link and repeated link is measured, and measurement result is sent to the base station, described measurement result is the foundation that the Route Selection of transfer of data is carried out in described base station.
3. the system as claimed in claim 1 is characterized in that, the MAC layer in the described system comprises second control device, and described second control device comprises any one or the combination in any in the following functional unit:
The first relay function unit is used for: behind the downlink data that receives the base station transmission, transmit processing, downlink data after handling is sent to UE, and, behind the upstream data that receives the UE transmission, transmit processing, the upstream data after handling is sent to described base station;
The first two-way RACH unit is used for: issues non-competing access lead and gives UE, and handle RACH access and the feedback contention-based solution information of described UE, and, send random access guiding message to the base station, and send the scheduled transmission parameter according to the base station answer.
4. the system as claimed in claim 1 is characterized in that, the MAC layer in the described system comprises second control device, and described second control device comprises any one or the combination in any in the following functional unit:
The second relay function unit, be used for: behind the downlink data that receives the base station transmission, transmit processing, downlink data after handling is sent to UE, and return information gives described base station, and, behind the upstream data that receives the UE transmission, transmit processing, the upstream data after handling is sent to described base station, and return information is given described UE;
The second two-way RACH unit is used for: issues non-competing access lead and gives UE, and handle RACH access and the feedback contention-based solution information of described UE, and, send random access guiding message to the base station, and send the scheduled transmission parameter according to the base station answer.
5. the system as claimed in claim 1 is characterized in that, the rlc layer in the described system comprises the 3rd control device, and described the 3rd control device comprises any one or the combination in any in the following functional unit:
The 3rd relay function unit, be used for: behind the downlink data that receives the base station transmission, transmit processing, and the downlink data after will handling sends to UE, and return information gives described base station, and, behind the upstream data that receives the UE transmission, transmit processing, and the upstream data after will handling sends to described base station, and return information is given described UE;
The ARQ switch element is used for closing the ARQ function when described radio repeater station is the intermediate node of repeated link, when described radio repeater station is the endpoint node of repeated link, opens the ARQ function.
6. the system as claimed in claim 1 is characterized in that, the PDCP layer in the described system comprises the 4th control device, and described the 4th control device comprises any one or the combination in any in the following functional unit:
The 4th relay function unit is used for transmitting processing behind the downlink data that receives the base station transmission, and the downlink data after will handling sends to UE, and, after receiving the upstream data that UE sends, transmit processing, and the upstream data after will handling sends to described base station;
The enhancement mode ciphering unit is used to adopt the enhancement mode cryptographic algorithm that the interactive information between described radio repeater station and the base station is encrypted.
7. as any described system of claim 1-6, it is characterized in that described first control device, second control device, the 3rd control device and/or the 4th control device are gathered in same entity.
8. the communication means of a wireless relay system is characterized in that, comprising:
Described wireless relay stands under the Coordination Treatment of rrc layer of wireless relay system and communicates with terminal, base station.
9. method as claimed in claim 8 is characterized in that, described Coordination Treatment comprises any one or the combination in any in the following operation:
Carry out network topology and select, and determine whether to connect with the adjacent radio repeater station of described radio repeater station according to selection result;
Ask the base station assigns resource, and be this UE Resources allocation according to the UE request;
Be repeated link and access link configuration DRX/DTX;
When the access request that receives UE, determine whether to accept the access request of described UE according to the congestion situation of access link and repeated link;
Repeated link finish and the base station between RB set up, initiate RB at access link to UE and set up request;
Signal quality to access link and repeated link is measured, and measurement result is sent to the base station, and described measurement result is the foundation that the Route Selection of transfer of data is carried out in described base station.
10. method as claimed in claim 8 is characterized in that, comprises that also the relay function by MAC layer in the system or rlc layer carries out optional relaying feedback, specifically comprises:
Behind the downlink data that receives the base station transmission, transmit processing, the downlink data after handling is sent to UE; And,
Behind the upstream data that receives the UE transmission, transmit processing, the upstream data after handling is sent to described base station.
11. method as claimed in claim 10 is characterized in that, the downlink data after will handling also comprises after sending to UE: return information is given described base station; After upstream data after will handling sent to described base station, return information was given described UE.
12. method as claimed in claim 8 is characterized in that, also comprises by the RACH function of the MAC layer in the system carrying out the RACH access procedure, specifically comprises:
Issue non-competing access lead and give UE, and handle RACH access and feedback response and the competition solution information of described UE; And,
Send random access guiding message to the base station, send RRC connection request or RRC switch acknowledgment message.
13. method as claimed in claim 8 is characterized in that, comprises that also the ARQ switching function by the rlc layer in the system carries out the control of ARQ switch, specifically comprises:
When described radio repeater station is the intermediate node of repeated link, close the ARQ function, when described radio repeater station is the endpoint node of repeated link, open the ARQ function.
14. method as claimed in claim 8 is characterized in that, comprises that also the relay function by the PDCP layer in the system carries out the relaying feedback, specifically comprises:
Behind the downlink data that receives the base station transmission, transmit processing, and the downlink data after will handling sends to UE; And,
Behind the upstream data that receives the UE transmission, transmit processing, and the upstream data after will handling sends to described base station.
15. method as claimed in claim 8 is characterized in that, also comprises by the enhancement mode encryption function carrying out the enhancement mode ciphering process, is specially: adopt the enhancement mode cryptographic algorithm that the interactive information between described radio repeater station and the base station is encrypted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910129608.3A CN101841920B (en) | 2009-03-17 | 2009-03-17 | Radio relay system and communication method for radio relay system |
| PCT/CN2010/070977 WO2010105532A1 (en) | 2009-03-17 | 2010-03-11 | Radio relay system and communication method for radio relay system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910129608.3A CN101841920B (en) | 2009-03-17 | 2009-03-17 | Radio relay system and communication method for radio relay system |
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| CN101841920B CN101841920B (en) | 2013-06-05 |
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| WO (1) | WO2010105532A1 (en) |
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| WO2010105532A1 (en) | 2010-09-23 |
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