CN101841920B - 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 relatedrelay 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
Develop rapidly along with express network technology and 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 higher, radio wave is faster with range attenuation, so high operate frequency will cause the coverage of base station in network very limited, for this point, prior art has added radio repeater station in network, the scope that covers with the increase system.
Radio repeater station communicates by air interface and base station, and forwards 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 less than building the base station, and more can save the laying time.Therefore, use relay station to obtain larger 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 in prior art, there are the following problems at least: 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 base station.
Just control simply the data between relay station transfer mobile terminal and base station in a lot of situations, and along with the develop rapidly of wireless network, the complexity of wireless network is also more and more higher, data volume mutual between network also increases day by day, and how utilizing radio repeater station reasonably to dispatch wireless network resource becomes the problem of needing at present solution badly.
Summary of the invention
In view of this, the embodiment of the present 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 present invention is achieved in that
A kind of wireless relay system comprises the radio resource control RRC layer, and described rrc layer comprises the first control device that communicates be used to coordinating described radio repeater station and user equipment (UE), base station;
Wherein, described first control device comprises any one or the combination in any in the following functions unit:
Functional network topology selected cell: be used for carrying 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 for request 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 configure respectively DRX/DTX;
Access control function: be used for determining whether to accept the access request of described UE according to the loading condition of access link and repeated link when receiving the access request of UE;
Resource Block RB sets up the unit: be used for repeated link complete 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.
The embodiment of the present 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;
Wherein, described Coordination Treatment comprises any one or the combination in any in 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;
Request 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 receiving the access request of UE, determine whether to accept the access request of described UE according to the congestion situation of access link and repeated link;
Repeated link complete 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.
Prior art is compared, the technical scheme that the embodiment of the present invention provides has the following advantages and characteristics: the embodiment of the present invention is by the be correlated with configuration of relay function of 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 is controlled, 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 present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the protocol stack architecture figure that prior art comprises the air interface of relay function;
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 present 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 present 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 present 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 present 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 present invention;
Fig. 7 is that the disclosed embodiment of the present invention of the embodiment of the present invention is disclosed based on carrying out functional network topology selection flow chart in the communication means of above-mentioned wireless relay system;
Fig. 8 is that the disclosed embodiment of the present invention of the embodiment of the present invention is disclosed based on carrying out the flow chart of resource request and distribution in the communication means of above-mentioned wireless relay system;
Fig. 9 is that the disclosed embodiment of the present invention of the embodiment of the present invention is disclosed based on carrying out the flow chart of Route Selection in the communication means of above-mentioned wireless relay system;
Figure 10 accesses the flow chart of congestion control in the disclosed communication means based on above-mentioned wireless relay system of the disclosed embodiment of the present invention of the embodiment of the present invention;
Figure 11 is the flow chart that the disclosed radio bearer based on carrying out repeated link and access link in the communication means of above-mentioned wireless relay system of the disclosed embodiment of the present invention of the embodiment of the present invention is set up;
Figure 12 is the disclosed flow chart 1 based on carrying out middle realization feedback relay function in the communication means of above-mentioned wireless relay system of the disclosed embodiment of the present invention of the embodiment of the present invention;
Figure 13 is the disclosed flow chart 2 based on carrying out middle realization feedback relay function in the communication means of above-mentioned wireless relay system of the disclosed embodiment of the present invention of the embodiment of the present invention;
Figure 14 be the disclosed embodiment of the present invention of the embodiment of the present invention disclosed based on UE in the communication means of above-mentioned wireless relay system based on non-competing random access procedure figure.
Embodiment
For quote and know for the purpose of, the technical term that hereinafter uses, 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 repeat request;
LTE-A:Long Term Evolution-Advanced, that is: advanced Long Term Evolution;
MAC:Medium Access Control, that is: media 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 is controlled;
RRC:Radio Resource Control, that is: Radio Resource is controlled;
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 access.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the protocol stack architecture figure of present air interface, can be obtained by Fig. 1, aloft in the protocol stack of the interface framework, comprise physics (PHY) layer, media access control (MAC) layer, Radio Link control (RLC) layer, PDCP (PDCP) layer and Radio Resource and control (RRC) layer.Wherein, the PHY layer has the functions such as modulating-coding, spread spectrum, the transmission channel of completing channel be multiplexing; The MAC layer mainly contains functions such as completing access control, logic channel road transmission channel mapping, scheduling of resource, mixing re-transmission; Rlc layer mainly contains completes retransmission mode selection, the functions such as HARQ, encryption; The PDCP layer mainly contains the function that the packet of completing different-format converges conversion; Rrc layer mainly contains the function of completing RRM.
The disclosed wireless relay system of the embodiment of the present invention is 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 functions 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 after topology of networks, if it is P2P that eNB selects topology of networks, described RS initiates to connect to adjacent R S the request of foundation.
Resource request and allocation units 22 are used for: request base station assigns resource, and be this UE Resources allocation according to the UE request; Specifically, take semi-persistent scheduling as 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 is dynamically described UE dynamic assignment upstream or downstream resource according to the resource request message of UE, and replys UE by resource allocation message.
DRX/DTX dispensing unit 23 is used for: for repeated link and access link configure respectively DRX/DTX; DRX/DTX dispensing unit 23 can be comprised of DRX/DTX-u and DRX/DTX-e two parts, wherein DRX/DTX-e is responsible for the configuration of access link, for example, only configure DTX between RS and UE, and in MAC master's configuration information element the configuration its begin the parameters such as side-play amount, cycle, DRX/DTX-u is responsible for the configuration of repeated link, for example only configures DRX between RS and eNB, and in MAC master's configuration information element the configuration its begin the 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 by DRX/DTX-u after receiving the relevant parameter that eNB sends, initiatively carry out the configuration of the relevant sleep parameters of UE.
RB sets up unit 25, is used for: repeated link complete 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, first carry out access control by access control unit 24, then set up unit 25 by RB and carry out RB and set up process, set up in process at this, the RB that UE initiates sets up in request can carry resource allocation request, so, can complete resource request and batch operation by resource request and allocation units 22, after resource request and batch operation are completed, carry out Route Selection by Route Selection unit 26.
In addition, carrying out during RB sets up process, RB sets up unit 25 and initiates radio bearer foundation request to eNB, and the radio bearer that reception eNB returns is set up the response message of request, 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 to UE by the DRX/DTX-u in DRX/DTX dispensing unit 23, at this moment, need not to set up at RB and carry out after completing, can to set up process separate with RB.
This embodiment only rrc layer in LTE is example, in other similar network, also can use the present invention to realize similar functions.In the disclosed wireless relay system of other embodiment, be provided with second control device in the MAC layer, as shown in Figure 3, described second control device can comprise any one or the combination in any in the following functions unit:
The first relay function unit 31 is used for: after receiving the downlink data that the base station sends, carry out forward process, downlink data after processing is sent to UE, and, after the upstream data that receives the UE transmission, carry out forward process, the upstream data after processing is sent to described base station;
The first two-way RACH unit 32 is used for: issues non-competing access lead to UE, and processes RACH access and the feedback contention-based solution information of described UE, and, send random access guiding message to the base station, and reply according to the base station and send the scheduled transmission parameter.
Need to prove, when described second control device comprises the 31 and first two-way RACH unit 32, the first relay function unit simultaneously, first the RACH by the first two-way RACH unit 32 described UE of processing accesses and feedback contention-based solution information, and after reply sending the scheduled transmission parameter according to the base station, carry out work by the first relay function unit 31.
need to prove, another version of second control device as shown in Figure 4, comprise the 41 and second two-way RACH unit 42, the second relay function unit, 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 for making radio repeater station: after receiving the downlink data that the base station sends, carry out forward process, downlink data after processing is sent to UE, and return information is given described base station, and, after the upstream data that receives the UE transmission, carry out forward process, upstream data after processing 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 functions unit, the below only introduces the 3rd control device that comprises all functions unit, as shown in Figure 5, comprising:
The 3rd relay function unit 51, be used for: after the downlink data that receives the base station transmission, carry out forward process, and the downlink data after processing sends to UE, and return information gives described base station, and, after the upstream data that receives the UE transmission, carry out forward process, and the upstream data after processing 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 functions unit, the below only introduces the 4th control device that comprises all functions unit, as shown in Figure 6, comprising:
The 4th relay function unit 61 is used for carrying out forward process after receiving the downlink data that the base station sends, and the downlink data after processing sends to UE, and, after receiving the upstream data that UE sends, carry out forward process, and the upstream data after processing sends to described base station.
Enhancement mode ciphering unit 62 is used for adopting the enhancement mode cryptographic algorithm that the interactive information between described radio repeater station and base station is encrypted.
Need to prove, above-mentioned first control device, second control device, the 3rd control device and/or the 4th control device can be integrated in same entity, such as, can be arranged in radio repeater station, can certainly be separate.
Meanwhile, the embodiment of the present invention also provides a kind of communication means based on above-mentioned wireless relay system, and the method is mainly by arranging 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 following operation:
The radio bearer of network topology selection, resource request and distribution, Route Selection, DRX/DTX configuration, congestion control and repeated link and access link is set up.
Below above-mentioned each operation is described in detail respectively:
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:
(eNB) sends network topology selection request to step 701:RS1 to the base station;
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, 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 from different network nodes.
2, resource request and distribution
Fig. 8 is 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 come to eNB application Radio Resource with the situation of Radio Resource according to the Radio Resource operating position of self and quantity and each UE of its lower UE.
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 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 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 to eNB application resource according to the operating position of its lower UE resource.
3, Route Selection
UE and eNB between when carrying out the transmission of data, can complete by direct link, also can carry out by radio repeater station the forwarding of data, and select any bar link actually, generally that signal quality according to each link decides, the specific embodiment of the invention is by configuring routing function in the trunk module of rrc layer, this function can be measured to the signal quality of repeated link RS, and measurement result is 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 the flow chart of realizing 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, can be also that UE measures relevant link and reports prior to RS, 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, the transfer of data between eNB and UE will be carried out relaying by RS, when if the direct link signal quality is better than repeated link and access link, can directly carries out the transmission of data between eNB and 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 configuring 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 being responsible for the configuration of access link, for example can only configure DTX between RS and UE, and in MAC master's configuration information element the configuration its begin the parameters such as amount of bias, cycle; And DRX/DTX-e is mainly used in being responsible for the configuration of repeated link, for example can only configure DRX between RS and base station, and configures the 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 receiving the access request of UE, whether allow this UE access according to the loading condition decision of access link and repeated link at that time, Figure 10 is the flow chart that RS carries out access control, and 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, determines whether to permit this UE access according to monitoring result;
In this step, if RS monitors access link or the arbitrary link load of repeated link is overweight, to refuse the access request of this UE.Wherein, the access link of RS monitoring and the loading condition of repeated link, it can be specifically the up link that monitoring UE arrives RS, be that uplink access link and RS are to the up link of base station, be relay uplink, loading condition, wherein, the loading condition of the uplink access link of RS monitoring specifically can be detected by this RS and obtains; The loading condition of the relay uplink of RS monitoring 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, i.e. 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 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 at rrc layer the configuration that radio bearer (RB) is set up function, the function that the radio bearer that can make RS have processing repeated link and access link is set up, Figure 11 is that RS carries out the flow chart that radio bearer is set up, 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 the response message of request; 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 afterwards carrying out the DRX/DTX configuration 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 of RRM and scheduling aspect, 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 respectively different separately use 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 various functions in the wireless network data transmitting procedure, 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 completing different-format converges conversion; be added into trunk module at this layer; except realizing the basic relay function of radio repeater station; embodiment provided by the present invention has also configured 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 eNB; therefore need higher Information Security; so configured the enhancement mode encryption function in the PDCP layer after, can effectively protect the safety of transfer of data between RS and eNB.
In addition, the major function for lower one deck (being rlc layer) of PDCP is to complete retransmission mode selection, automatic repeat request and encryption etc.The optional feedback relay function of configuration in this layer can make RS send the confirmation 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 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 forward process;
Step 1203:RS sends to eNB and confirms feedback message, with the state notifying eNB of received downlink data;
Step 1204:RS will be through the data distributing of forward process to UE.
So far, RS has completed 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 forward process;
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 the data of forward process.
So far, RS has completed 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, due to the generation that the network equipment breaks down or network produces the situation such as congested, can produce makeing mistakes or losing of data message, so just need the recipient in the situation that confirmation has message make mistakes or lose, the message that retransfers and make mistakes or lose to the transmit leg request.The specific embodiment of the invention has just configured automatic repeat request (ARQ) switching function in rlc layer, this function makes RS when transfer up-downgoing data, have the automatic repeat request function, namely RS can ask transmit leg to resend the message of makeing mistakes after receiving error message.simultaneously, the number of times that retransmits in order to reduce message, improve the efficient in data transfer procedure, if there are a plurality of repeated links between the one piece of data link, can also adopt automatic repeat request (HARQ) mode of mixing between each jumping of repeated link, be that between each of repeated link jumped, the mistake of transfer of data surpasses when setting scope, just carry out the re-transmission of error message, but the final jump at whole repeated link, the RS of this final jump need to open the ARQ function, to realize that whole repeated link has the ARQ function, like this, both improved the efficient of transfer of data, do not affect the accuracy of transfer of data yet.
The major function of lower one deck of rlc layer (MAC layer) is to complete access control, realize that logic channel is to the mapping of transmission channel, wireless resource scheduling etc.The specific embodiment of the invention configures 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 configured 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 being responsible for the access of UE, as shown in figure 14, this figure is UE based on non-competing random access procedure figure:
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 accesses at random;
Step 1403:RS issues random access to UE and replys message, carries the contents such as random access guiding sign, time adjustment information, the distribution of initial uplink resource in this message.
Correspondingly, RACH-e is mainly used in being responsible for access 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 is all to add corresponding functional module in each layer of protocol stack of the interface aloft, make radio repeater station except the 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, its encryption function of adding also can further improve the fail safe of transfer of data.
It will be understood by those skilled in the art that and to represent information, message and signal with many different techniques and any one in technology.For example, the message of mentioning in 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, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or combination both, for the interchangeability of hardware and software clearly is described, composition and the step of each example described in general manner according to function in the above description.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, 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 both combination is implemented.Software module can be placed in 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 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 apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (13)
1. a wireless relay system, is characterized in that, the rrc layer of described wireless relay system comprises the first control device that communicates for coordinating radio repeater station and user equipment (UE), base station;
Wherein, described first control device comprises any one or the combination in any in the following functions unit:
Functional network topology selected cell: be used for carrying 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 for request 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 configure respectively DRX/DTX;
Access control function: be used for determining whether to accept the access request of described UE according to the loading condition of access link and repeated link when receiving the access request of UE;
Resource Block RB sets up the unit: be used for repeated link complete 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.
2. the system as claimed in claim 1, is characterized in that, the MAC layer in described system comprises second control device, and described second control device comprises any one or the combination in any in the following functions unit:
The first relay function unit is used for: after receiving the downlink data that the base station sends, carry out forward process, downlink data after processing is sent to UE, and, after the upstream data that receives the UE transmission, carry out forward process, the upstream data after processing is sent to described base station;
The first two-way RACH unit is used for: issues non-competing access lead to UE, and processes RACH access and the feedback contention-based solution information of described UE, and, send random access guiding message to the base station, and reply according to the base station and send the scheduled transmission parameter.
3. the system as claimed in claim 1, is characterized in that, the MAC layer in described system comprises second control device, and described second control device comprises any one or the combination in any in the following functions unit:
The second relay function unit, be used for: after the downlink data that receives the base station transmission, carry out forward process, downlink data after processing is sent to UE, and return information gives described base station, and, after the upstream data that receives the UE transmission, carry out forward process, the upstream data after processing 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 to UE, and processes RACH access and the feedback contention-based solution information of described UE, and, send random access guiding message to the base station, and reply according to the base station and send the scheduled transmission parameter.
4. the system as claimed in claim 1, is characterized in that, the rlc layer in described system comprises the 3rd control device, and described the 3rd control device comprises any one or the combination in any in the following functions unit:
The 3rd relay function unit, be used for: after the downlink data that receives the base station transmission, carry out forward process, and the downlink data after processing sends to UE, and return information gives described base station, and, after the upstream data that receives the UE transmission, carry out forward process, and the upstream data after processing 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.
5. the system as claimed in claim 1, is characterized in that, the PDCP layer in described system comprises the 4th control device, and described the 4th control device comprises any one or the combination in any in the following functions unit:
The 4th relay function unit is used for carrying out forward process after receiving the downlink data that the base station sends, and the downlink data after processing sends to UE, and, after receiving the upstream data that UE sends, carry out forward process, and the upstream data after processing sends to described base station;
The enhancement mode ciphering unit is used for adopting the enhancement mode cryptographic algorithm that the interactive information between described radio repeater station and base station is encrypted.
6. as the described system of claim 1-5 any one, it is characterized in that, described first control device, second control device, the 3rd control device and/or the 4th control device set are in same entity.
7. 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;
Wherein, described Coordination Treatment comprises any one or the combination in any in 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;
Request 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 receiving the access request of UE, determine whether to accept the access request of described UE according to the congestion situation of access link and repeated link;
Repeated link complete 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.
8. method as claimed in claim 7, is characterized in that, comprises that also the relay function by the MAC layer in system or rlc layer carries out optional relaying feedback, specifically comprises:
After the downlink data that receives the base station transmission, carry out forward process, the downlink data after processing is sent to UE; And,
After the upstream data that receives the UE transmission, carry out forward process, the upstream data after processing is sent to described base station.
9. method as claimed in claim 8, is characterized in that, the downlink data after processing also comprises after sending to UE: return information is given described base station; After upstream data after processing sent to described base station, return information was given described UE.
10. method as claimed in claim 7, is characterized in that, also comprises by the RACH function of the MAC layer in system carrying out the RACH access procedure, specifically comprises:
Issue non-competing access lead to UE, and process 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.
11. method as claimed in claim 7 is characterized in that, comprises that also the ARQ switching function by the rlc layer in 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.
12. method as claimed in claim 7 is characterized in that, comprises that also the relay function by the PDCP layer in system carries out the relaying feedback, specifically comprises:
After the downlink data that receives the base station transmission, carry out forward process, and the downlink data after processing sends to UE; And,
After the upstream data that receives the UE transmission, carry out forward process, and the upstream data after processing sends to described base station.
13. method as claimed in claim 7 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 base station is encrypted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN101841920B (en) | 2013-06-05 |
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| JP4932933B2 (en) * | 2010-10-06 | 2012-05-16 | 株式会社エヌ・ティ・ティ・ドコモ | Relay station and relay method for relaying wireless communication |
| CN102811497A (en) * | 2011-06-03 | 2012-12-05 | 中国移动通信集团公司 | Method, terminal and system for accessing network |
| JP6055627B2 (en) * | 2012-08-14 | 2016-12-27 | 株式会社Ｎｔｔドコモ | Mobile communication method and mobile station |
| WO2014110726A1 (en) | 2013-01-16 | 2014-07-24 | 华为技术有限公司 | Method for network access of mobile terminal, and mobile terminal |
| CN106454995B (en) * | 2015-08-10 | 2021-06-04 | 上海诺基亚贝尔股份有限公司 | Method for configuring relay discovery message transmission resources, corresponding relay terminal device and remote terminal device |
| CN108432338A (en) * | 2016-02-04 | 2018-08-21 | 华为技术有限公司 | A kind of data transmission system, method and apparatus |
| CN109328479B (en) * | 2016-06-17 | 2023-09-15 | 索尼集团公司 | Method for allocating radio resources, relay device and wireless communication system |
| WO2018027821A1 (en) * | 2016-08-11 | 2018-02-15 | 华为技术有限公司 | Communication method, related device, and system |
| CN108307486A (en) * | 2016-08-11 | 2018-07-20 | 索尼公司 | Electronic equipment and method for network-control end and network node |
| CN106688255A (en) * | 2016-11-14 | 2017-05-17 | 北京小米移动软件有限公司 | Communication method and apparatus |
| CN107148058B (en) * | 2017-05-12 | 2020-10-30 | 合肥东芯通信股份有限公司 | Radio resource control protocol stack system |
| ES2928151T3 (en) * | 2018-01-09 | 2022-11-15 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Relay network duplex coordination method and relay node device |
| US11622411B2 (en) | 2019-12-13 | 2023-04-04 | Qualcomm Incorporated | Sidelink communication using a cellular discontinuous reception configuration |
| US20210227620A1 (en) * | 2020-01-21 | 2021-07-22 | Asustek Computer Inc. | Method and apparatus for configuring sidelink discontinuous reception in a wireless communication system |
| CN116419289A (en) * | 2020-02-21 | 2023-07-11 | 维沃移动通信有限公司 | Discontinuous transmission configuration method and user equipment |
| JP7413507B2 (en) * | 2020-03-26 | 2024-01-15 | 京セラ株式会社 | Communication control method |
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| WO2004059927A1 (en) * | 2002-12-27 | 2004-07-15 | Telefonaktiebolaget Lm Ericsson (Publ). | Tunnelling tdm traffic over mpls |
| CN100411375C (en) * | 2005-03-30 | 2008-08-13 | 华为技术有限公司 | Method for controlling terminal access network |
| KR100810201B1 (en) * | 2005-06-18 | 2008-03-06 | 삼성전자주식회사 | Apparatus and method for routing in a multi-hop relay cellular network |
| CN1905728A (en) * | 2005-07-29 | 2007-01-31 | 西门子（中国）有限公司 | Method for network reconfiguration in multihop wireless mobile communication network |
| CN101137204B (en) * | 2006-08-30 | 2011-04-27 | 华为技术有限公司 | Mobile communication system and mobile communication method |
| CN101166055B (en) * | 2006-10-18 | 2011-06-01 | 华为技术有限公司 | Multi-hop relay method and multi-hop relay system |
| KR101466897B1 (en) * | 2007-07-09 | 2014-12-02 | 삼성전자주식회사 | Method and apparatus for supporting connectivity management for peer to peer in wirless commumication system |
| CN101384020B (en) * | 2007-09-05 | 2012-07-04 | 中兴通讯股份有限公司 | Wireless relay system and data transmission method |
| CN101159751B (en) * | 2007-11-14 | 2011-10-26 | 中兴通讯股份有限公司 | Method and device of transmitting time division multiplex service through IP switch network |
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| WO2010105532A1 (en) | 2010-09-23 |
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