CN101888701B - Method for avoiding uplink interference - Google Patents
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- CN101888701B CN101888701B CN 200910083785 CN200910083785A CN101888701B CN 101888701 B CN101888701 B CN 101888701B CN 200910083785 CN200910083785 CN 200910083785 CN 200910083785 A CN200910083785 A CN 200910083785A CN 101888701 B CN101888701 B CN 101888701B
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Abstract
The invention provides a method for avoiding uplink interference. The method comprises the following steps: a multi-hop base station outputs a first time-sharing scheduling instruction to a relay; the multi-hop base station outputs a second time-sharing scheduling instruction to a mobile terminal served by the base station, wherein, the second time-sharing scheduling instruction is generated according to the first time-sharing scheduling instruction and indicates the mobile terminal served by the base station to upload a data time slot; the relay outputs a third time-sharing scheduling instruction and control signaling to the mobile terminal served by the relay, wherein, the third time-sharing scheduling instruction is generated according to the first time-sharing scheduling instruction and indicates the mobile terminal served by the relay to upload the data time slot; and the multi-hop base station receives the data uploaded by the mobile terminal served by the base station at the uploading data time slot of the mobile terminal served by the base station, and receives the data uploaded by the mobile terminal served by the relay at different time slots through the relay. By adopting the method of the invention, the interference between the uplink of the mobile terminal served by the base station and the base and the uplink of the mobile terminal served by the relay and the relay is avoided.
Description
Technical field
The present invention relates to the communications field, particularly a kind of method of avoiding uplink channel interference.
Background technology
Long Term Evolution (Long Term Evolution, LTE) system supports Frequency Division Duplexing (FDD) (Frequency Division Duplex, FDD) and two kinds of different duplex modes of time division duplex (Time Division Duplex, TDD).FDD receives and sends at two symmetrical frequency channels that separate, and separates receiving and transmitting channel with the protection frequency range; FDD must adopt paired frequency, relies on frequency to come the differentiating uplink and downlink link, and this has just caused when supporting non-symmetrical service, and the availability of frequency spectrum will reduce greatly.TDD does not carry out separating on the carrier wave frequency range (Carrier Frequency) to up link and down link, but by different time slot (Time Slot) up link and down link is separated; In the mobile communication system of TDD mode, receive and send the different time-gap of the same frequency carrier of use as the carrying of channel, time resource distributes at both direction.
The TDD mode has than the FDD mode that spectrum disposition is flexible, the availability of frequency spectrum is high and the characteristics such as up-downgoing channel reciprocity, can satisfy the trend that next generation mobile communication system distributes scatteredization to requirement and the frequency of bandwidth, therefore, LTE TDD has very strong competitiveness in the communication system in future.
By between base station and terminal, introducing via node, form novel relaying cellular communication system, can effectively improve network coverage quality, capacity and improve resource utilization, wireless relaying technique provides a kind of solution with high performance-price ratio.Wireless relaying technique is introduced the LTE system, between the base station of LTE system and terminal, introduce via node, formed advanced (Long Term Evolution Advanced, the LTE-Advanced) system of Long Term Evolution.After introducing via node, the interference environment more complicated of LTE-Advanced TDD system, may exist the base station to base station, base station to relay station, base station to user, relay station to base station, relay station to relay station, relay station to user, user to base station, user to multiple interference modes such as relay station or user to users.
Fig. 1 is the structural representation of existing LTE-Advanced system, and this system comprises multi-hop base station (MR-BS), relay (RS), by the portable terminal of relay services (MS-R) and the portable terminal (MS-B) of being served by the base station; MR-BS is the node of finishing the wave point function, and RS expands the coverage area or node that network capacity is introduced, the mobile site of MS-R for serving within the RS coverage and by RS, the website of MS-B for not served by MR-BS within the RS coverage; MR-BS is called repeated link to the air interface links of RS, and the air interface links of MS-R to the air interface links of RS and MS-B to MR-BS is called access link.The LTE-Advanced system that is operated under the tdd mode is discontinuous transmission, all time slots are divided into respectively ascending time slot and descending time slot, have descending access link to the uplink access link of RS, RS to MS-R of the relay uplink of six kinds of different links: MR-BS to the downlink relay link of RS, RS to MR-BS, MS-R, the MS-B descending access link to the uplink access link of MR-BS and MR-BS to MS-B this moment in the system.LTE-Advanced TDD system distributes to above-mentioned six kinds of different links with the ascending time slot in the radio frames and descending time slot, carries out the transmission of data and signal.
Fig. 2 is the structural representation of existing LTE-Advanced TDD system wireless frame; as shown in Figure 2; the duration of a radio frames is 10 milliseconds; each radio frames is that 5 milliseconds field consists of by two duration; each field is that 1 millisecond subframe forms by 5 duration; 4 common subframes and 1 special subframe are wherein arranged, and special subframe is by ascending pilot frequency (UpPTS), and boundary belt (GP) and descending pilot frequency (DwPTS) form.If the current wireless frame is divided into a field and a+1 field, a field is current field, and the a+1 field is next field; The last radio frames of current wireless frame comprises b field and b+1 field, and the b+1 field of last radio frames is last field.To RS, RS exports the 3rd instruction to MS-R in the first subframe of next field to first instruction instruct MS-R at the 3rd subframe uploading data of next field, RS at the 4th subframe uploading data of next field to MR-BS.Second instruction instruct MS-B at the 3rd subframe uploading data of current field to MR-BS.The 3rd instruction instruct MS-R at the 3rd subframe uploading data of current field to RS.No matter adopt wireless frame structure shown in Figure 2, be MR-BS or RS, and the first subframe of current field is used for descending access zone, and MR-BS exports the second instruction to MS-B, and RS exports the 3rd instruction to MS-R; The second subframe of current field is a special subframe; The 3rd subframe of current field is used for up access zone, and MR-BS receives the data that MS-B uploads, and RS receives the data that MS-R uploads; The 4th subframe of current field is used for up Mixed Zone, RS at this subframe uploading data to MR-BS; The 5th subframe of current field is used for the down mixing zone, and MR-BS is used to indicate the first instruction of next field to RS in this subframe output; The first subframe to the five subframes of i+1 field repeat the process of the first subframe to the five subframes of i field, and wherein, the second subframe in the i+1 field is special subframe.
Because there are six kinds of links shown in Figure 1 in existing LTE-Advanced TDD system, this system is difficult to by wireless frame structure shown in Figure 2 above-mentioned six kinds of links to be carried out time domain and cuts apart, and namely MR-BS only carries out TDD to the access link of RS to the repeated link of MR-BS and MS-B to MR-BS and cuts apart.At this moment, the uplink access link of MS-R to the uplink access link of RS and MS-B to MR-BS be the incomplete quadrature of employed access link resource at a time, and MS-R in MS-B all in the 3rd subframe of current field by the uplink access link the transmission of data, this has just caused MS-R to the uplink access link of RS and MS-B to existence interference between the uplink access link of MR-BS.In addition, the broadcasting transmitting characteristics of radio communication so that the transmission of signal from the source to the destination can by around website listen to, based on this feature, RS can monitor the data of MS-B, when MS-B and MS-R used identical frequency resource, the monitor function of RS can aggravate MS-R to the uplink access link of RS and MS-B to the interference between the uplink access link of MR-BS.Interference problem between existing LTE-Advanced TDD system up-link has directly affected average throughput and the frequency efficiency of this system, has reduced the performance of system.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of avoiding uplink channel interference, and the method can be avoided the interference between up link.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of method of avoiding uplink channel interference, the method comprises:
A, multi-hop base station are exported the first timesharing dispatch command to relaying, and the portable terminal that the indication of described the first timesharing dispatch command is served by the portable terminal of relay services and by the base station is in the different time-gap uploading data;
B, multi-hop base station export the second timesharing dispatch command to served by the base station portable terminal, described the second timesharing dispatch command generates according to the first timesharing dispatch command, and also there is the time slot that stops to the multi-hop base station uploading data in the portable terminal uploading data time slot that exists indication to be served by the base station;
Relaying will generate according to the first timesharing dispatch command and indication is exported to by the portable terminal of relay services by the portable terminal uploading data time slot of relay services and the 3rd timesharing dispatch command and the control signal that stop the uploading data time slot;
The data that the portable terminal that C, multi-hop base station reception are served by the base station is uploaded at the time slot of the portable terminal uploading data of being served by the base station receive the data of being uploaded by relaying in different time-gap by the portable terminal of relay services.
In the said method, described the first timesharing dispatch command of steps A exports relaying at last field to by multi-hop base station;
Described the first timesharing dispatch command comprises: stopped uploading data to relaying by the portable terminal of relay services at the 3rd field of current field; By the portable terminal of relay services at the 5th subframe uploading data of current field to relaying; Relaying is exported the 3rd timesharing dispatch command extremely by the portable terminal of relay services in the first subframe of current field; Relaying adopts the mode of frequency division multiplexing in the 4th subframe of current field, export control signal to by the portable terminal of relay services in same subframe by the channel of different frequency, uploads the data of buffer memory to the multi-hop base station;
Described the second timesharing dispatch command comprises: to the multi-hop base station, the portable terminal of being served by the base station stops uploading data to the multi-hop base station in the 5th subframe of current field to the portable terminal of being served by the base station at the 3rd subframe of current field and the 4th subframe uploading data;
Described the 3rd timesharing dispatch command is for to be stopped uploading data to relaying by the portable terminal of relay services in the 3rd subframe of current field, at the 5th subframe uploading data of current field to relaying.
Described control signal is that relaying feeds back to the signaling that is indicated whether correctly to receive the data of being uploaded by the portable terminal of relay services by the portable terminal of relay services.
In the said method, the time slot of the described portable terminal uploading data of being served by the base station of step B comprises: the 3rd subframe of the current field of indication uploading data and the 5th subframe of the current field that indication stops uploading data;
The described time slot by the portable terminal uploading data of relay services of step B comprises: indication stop uploading data current field the 3rd subframe and indicate the 5th subframe uploading data of current field.
In the said method, the time slot of the described portable terminal uploading data of being served by the base station of step C comprises: the 3rd subframe of the current field of indication uploading data and the 5th subframe of the current field that indication stops uploading data;
The described different time-gap of step C comprises that indication is stopped the 3rd subframe of current field of uploading data and the 5th subframe of current field of indication uploading data by the portable terminal of relay services.
In the said method, described the first timesharing dispatch command further comprises: relaying is monitored the data that the portable terminal of being served by the base station is uploaded to multi-hop base station in the 3rd subframe of current field, and with the data buffer storage monitored in relaying.
Preferably, multi-hop base station receive that relaying uploads in the data of monitoring time slot and obtaining, described relaying is monitored the data that the portable terminal of being served by the base station is uploaded to multi-hop base station monitoring time slot to monitor data that time slot obtains be relaying.
In the said method, the time slot of the described portable terminal uploading data of being served by the base station of step B comprises: the 3rd subframe of the current field of indication uploading data and the 5th subframe of the current field that indication stops uploading data;
The described time slot by the portable terminal uploading data of relay services of step B comprises: indication stop uploading data current field the 3rd subframe and indicate the 5th subframe uploading data of current field.
In the said method, the time slot of the described portable terminal uploading data of being served by the base station of step C comprises: the 3rd subframe of the current field of indication uploading data and the 5th subframe of the current field that indication stops uploading data;
The described different time-gap of step C comprises that indication is stopped the 3rd subframe of current field of uploading data and the 5th subframe of the current field that indication stops uploading data by the portable terminal of relay services;
The described monitoring time slot of step C is monitored the 3rd subframe of the current field of the portable terminal of being served by the base station for being used for relaying.
In the said method, the described different time-gap of steps A comprises: indication stopped uploading data by the portable terminal of relay services and the 3rd subframe of the current field of the portable terminal uploading data of being served by the base station and indication by the portable terminal uploading data of relay services and stopped the 5th subframe of uploading data by the portable terminal that the base station is served.
In the said method, described relaying is in the 4th subframe of current field and the working method of the 5th subframe employing frequency division multiplexing;
Described multi-hop base station adopts the working method of frequency division multiplexing in the 4th subframe of current field.
As seen from the above technical solutions, the invention provides a kind of method of avoiding uplink channel interference, multi-hop base station is exported the first timesharing dispatch command to relaying, and the portable terminal that the indication of described the first timesharing dispatch command is served by the portable terminal of relay services and by the base station is in the different time-gap uploading data; That multi-hop base station will generate according to the first timesharing dispatch command and indication is exported to the portable terminal of being served by the base station by the second timesharing dispatch command of the portable terminal uploading data time slot that the base station is served; Relaying will generate according to the first timesharing dispatch command and indication is exported to by the portable terminal of relay services by the 3rd timesharing dispatch command of the portable terminal uploading data time slot of relay services and control signal; The data that the portable terminal that the multi-hop base station reception is served by the base station is uploaded at the time slot of the portable terminal uploading data of being served by the base station receive the data of being uploaded by relaying in different time-gap by the portable terminal of relay services.Adopt method of the present invention, the portable terminal of being served by the base station can not occur in same field and by the portable terminal of the relay services situation of uploading data simultaneously, the portable terminal of being served by the base station among the present invention is during to the multi-hop base station uploading data, stopped to the relaying uploading data by the portable terminal of relay services, when the portable terminal of being served by the base station stops uploading data to multi-hop base station, by the portable terminal of relay services to the relaying uploading data, the portable terminal of being served by the base station with by the different time-gap uploading data of the portable terminal of relay services at same field, this just avoided since the portable terminal of being served by the base station with the up link of the portable terminal of being served by the base station that is caused by the portable terminal of relay services while uploading data and base station with by the interference problem between the up link of the portable terminal of relay services and relaying.
Description of drawings
Fig. 1 is the structural representation of existing LTE TDD system.
Fig. 2 is the wireless frame structure schematic diagram of existing LTE-Advanced TDD system.
Fig. 3 is the wireless frame structure schematic diagram of LTE-Advanced TDD of the present invention system.
Fig. 4 is the method flow diagram that the present invention avoids uplink channel interference the first preferred embodiment.
Fig. 5 is the method flow diagram that the present invention avoids uplink channel interference the second preferred embodiment.
Embodiment
For make purpose of the present invention, technical scheme, and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The invention provides a kind of method of avoiding uplink interference, the method comprises: multi-hop base station output indicating mobile terminal is in the first timesharing dispatch command of different time-gap uploading data to relaying; That multi-hop base station will generate according to the first timesharing dispatch command and indication is exported to the portable terminal of being served by the base station by the second timesharing dispatch command of the portable terminal uploading data time slot that the base station is served; Relaying will generate according to the first timesharing dispatch command and indication is exported to by the portable terminal of relay services by the 3rd timesharing dispatch command of the portable terminal uploading data time slot of relay services and control signal; The data that the portable terminal that the multi-hop base station reception is served by the base station is uploaded receive the data of being uploaded by relaying in different time-gap by the portable terminal of relay services.
Fig. 3 is the wireless frame structure schematic diagram of LTE-Advanced TDD of the present invention system, and is existing in conjunction with Fig. 3, and the wireless frame structure of LTE-Advanced TDD of the present invention system is described.
The radio frames of LTE-Advanced TDD of the present invention system adopts in the LTE TDD system take 10 milliseconds of wireless frame structures as the cycle, each radio frames is that 5 milliseconds field consists of by two duration, each field is that 1 millisecond subframe consists of by 5 duration, and each subframe comprises 2 time slots.In the present embodiment, the current wireless frame is divided into i field and i+1 field, the i+1 field has identical structure with the i field; The last radio frames of current wireless frame has identical structure with the current wireless frame, establishes last radio frames and is divided into j field and j+1 field, and j field and j+1 field have identical structure with the i field.The i field that the present embodiment is established the current wireless frame is current field, take the j+1 field of last radio frames as last field, take the i+1 field as next field.The below is take the current wireless frame as example, and the radio frames of MR-BS and RS is described, and is specific as follows:
For MR-BS, MR-BS generates the second timesharing dispatch command according to the first timesharing dispatch command of last field the 5th subframe output, sends to MS-B at current field.
The first timesharing dispatch command comprises: MS-R stops uploading data to RS in the 3rd subframe of current field; MS-R at the 5th subframe uploading data of current field to RS; RS exports the 3rd timesharing dispatch command to MS-R in the first subframe of current field; RS adopts the mode of frequency division multiplexing in the 4th subframe of current field, export control signal to MS-R in same subframe by the channel of different frequency, uploads the data of buffer memory to MR-BS.When RS has monitor function and supports cooperative communication, the first timesharing dispatch command comprises that also RS monitors the data that MS-B is uploaded to MR-BS in the 3rd subframe of current field, and with the data buffer storage monitored in RS.
The second timesharing dispatch command comprises: to MR-BS, MS-B stops uploading data to MR-BS in the 5th subframe of current field to MS-B at the 3rd subframe of current field and the 4th subframe uploading data.
For MR-BS, the first subframe of the current field of MR-BS is used for output the second timesharing dispatch command to MS-B; The second subframe of current field is special subframe; The 3rd subframe of current field is used for receiving the data that MS-B uploads; The 4th subframe of the current field of MR-BS adopts the mode of frequency division multiplexing, adopts the channel of different frequency to receive respectively the data that MS-B and RS upload in same subframe; The first timesharing dispatch command of next field of the 5th subframe output indication of the current field of MR-BS is to RS.
In the wireless frame structure of the present invention, the first subframe of MR-BS is used for descending access zone, and the second subframe is a special subframe, and the 3rd subframe is used for up access zone, and the 4th subframe is used for up hybrid domain and the 5th subframe is used for the downlink relay zone.For MR-BS, the descending access link of descending access area domain representation MR-BS to MS-B, the uplink access link of up access area domain representation MS-B to MR-BS, up hybrid domain represents the relay uplink of uplink access link and the RS to MR-BS of MS-B to MR-BS, the downlink relay link of downlink relay domain representation MR-BS to RS.
For RS, RS generates the 3rd timesharing dispatch command and control signal according to the first timesharing dispatch command that obtains from MR-BS.The 3rd timesharing dispatch command is that MS-R stops uploading data to RS in the 3rd subframe of current field, at the 5th subframe uploading data of current field to RS.Control signal is that RS feeds back to the signaling that MS-R indicates whether correctly to receive the data that MS-R uploads, this control signal comprises the signaling (ACK/NACK) that mixed automatic retransfer (HARQ) is relevant, correctly whether instruct MS-R receive data, if correctly receive the data that MS-R uploads, issue the indication of ACK signaling and received uploading data, otherwise, issuing the indication of NACK signaling and do not receive data, MS-R is at the 5th subframe data retransmission of current field.
The first subframe of the current field of RS is used for output the 3rd timesharing dispatch command to MS-R; The second subframe of current field is special subframe; The 4th subframe of current field adopts the mode of frequency division multiplexing, exports control signal to MS-R in same subframe by the channel of different frequency, uploads the data of buffer memory to MR-BS; The multiplexing mode of the 5th subframe proportion of current field at the first timesharing dispatch command of same subframe by next field of indication of the channel reception MR-BS output of different frequency, receives the data that MS-R uploads in current field.If RS has monitor function and supports cooperative communication, the 3rd subframe of the current field of RS is monitored the data that MS-B is uploaded to MR-BS, and the data that buffer memory is monitored are in RS; If RS does not have monitor function and do not support cooperative communication, the 3rd subframe of the current field of RS is idle.RS can receive by the 5th subframe of current field the data of MR-BS output.
In the wireless frame structure of the present invention, the first subframe of RS is used for descending access zone, the second subframe is a special subframe, and the 3rd subframe is used for cooperating up access zone, and the 4th subframe is used for up-downgoing mixed transport territory and the 5th subframe is used for up-downgoing mixing acceptance domain.For RS, the descending access link of descending access area domain representation RS to MS-R, the relay uplink of up-downgoing mixed transport domain representation RS to MR-BS and the descending access link of RS to MS-R, up-downgoing mixing acceptance domain represents the downlink relay link of MR-BS to RS and the uplink access link of MS-R to RS, cooperates the shared frequency resource of RS monitoring MS-B uploading data that up access area domain representation has monitor function.
At the RS place, up-downgoing occurs simultaneously, and namely uplink access link and downlink relay link can be undertaken by frequency division multiplexing simultaneously, or descending access link and relay uplink can be undertaken by frequency division multiplexing simultaneously, and above-mentioned link is the up-downgoing compounded link.
Fig. 4 is the method flow diagram that the present invention avoids uplink channel interference the first preferred embodiment, and in the present invention's the first preferred embodiment, RS does not have monitor function and do not support cooperative communication, and MS-B transmits direct uploading data to MR-BS without RS.Now in conjunction with Fig. 3 and Fig. 4, the method flow of the present invention's the first preferred embodiment is described, specific as follows:
Step 401: multi-hop base station is exported the first timesharing dispatch command to relaying;
MR-BS exports the first timesharing dispatch command to RS in the 5th subframe of last field.
The first timesharing dispatch command comprises: MS-R stops uploading data to RS at the 3rd field of current field; MS-R at the 5th subframe uploading data of current field to RS; RS exports the 3rd timesharing dispatch command to MS-R in the first subframe of current field; RS adopts the mode of frequency division multiplexing in the 4th subframe of current field, export control signal to MS-R in same subframe by the channel of different frequency, uploads the data of buffer memory to MR-BS.
Step 402: multi-hop base station is exported the second timesharing dispatch command to MS-B, and relaying is exported the 3rd timesharing dispatch command MS-R;
MR-BS generates the second timesharing dispatch command according to the first timesharing dispatch command; The second timesharing dispatch command comprises: to MR-BS, MS-B stops uploading data to MR-BS in the 5th subframe of current field to MS-B at the 3rd subframe of current field and the 4th subframe uploading data.
RS generates the 3rd timesharing dispatch command according to the first timesharing dispatch command; The 3rd timesharing dispatch command is that MS-R stops uploading data to RS in the 3rd subframe of current field, at the 5th subframe uploading data of current field to RS.
RS generates control signal according to the first timesharing dispatch command; Control signal is that relaying feeds back to the signaling that is indicated whether correct receive data by the portable terminal of relay services.
MR-BS exports the second timesharing dispatch command to MS-B in the first subframe of current field; RS exports the 3rd timesharing dispatch command to MS-R in the first subframe of current field.
Step 403: multi-hop base station receives the data that MS-B uploads, and RS does not obtain any data;
MS-B is according to the second timesharing dispatch command, in the 3rd subframe of current field and the 4th subframe uploading data to MR-BS; Simultaneously, MS-R is according to the 3rd timesharing dispatch command, stops uploading data to RS in the 3rd subframe of current field.
Step 404: it is data cached to the multi-hop base station that relaying adopts frequency division multiplexing to upload, and the output control signal is to MS-R;
In the present embodiment, do not have the data that monitor function and not supporting stores last field among the RS of cooperative communication the 5th subframe is uploaded; RS adopts the mode of frequency division multiplexing in the 4th subframe of current field, will store data upload to MR-BS in same subframe by different frequency channels, exports control signal to MS-R.RS adopts the mode of frequency division multiplexing in the 4th subframe of current field, both effectively utilized frequency resource, has avoided again the interference that produces between the down link of the up link of RS and MR-BS and RS and MS-R.
MR-BS adopts the mode of frequency division multiplexing in the 4th subframe of current field, receive the data that MS-B and RS upload in same subframe by different frequency channels; MR-BS adopts the mode of frequency division multiplexing, has both effectively utilized frequency resource, has avoided again the interference that produces between the up link of the up link of MS-B and MR-BS and RS and MR-BS.
Step 405: relaying adopts frequency division multiplexing to receive the data that MS-R uploads, and receives the first timesharing dispatch command of multi-hop base station output;
RS adopts the method for frequency division multiplexing in the 5th subframe of current field, receive the data that MS-R uploads in same subframe by different frequency channels, receives the first timesharing dispatch command of MR-BS output.RS adopts the mode of frequency division multiplexing in the 5th subframe of current field, both effectively utilized frequency resource, has avoided again the interference that produces between the up link of the down link of MR-BS and RS and MS-R and RS.
The first timesharing dispatch command that RS obtains in the 5th subframe of current field is identical with the first timesharing dispatch command in the step 401.
If MR-BS, RS, MS-B and MS-R proceed data and command, then repeated execution of steps 401 is to step 405.
Step 406: finish.
Fig. 5 is the method flow diagram that the present invention avoids uplink channel interference the second preferred embodiment, and in the second preferred embodiment of the present invention, RS has monitor function and supports cooperative communication, and MS-B can transmit partial data to MR-BS by RS.Now in conjunction with Fig. 3 and Fig. 5, the method flow of the present invention's the second preferred embodiment is described, specific as follows:
Step 501: multi-hop base station is exported the first timesharing dispatch command to relaying;
MR-BS exports the first timesharing dispatch command to RS in the 5th subframe of last field.
The first timesharing dispatch command comprises: MS-R stops uploading data to RS at the 3rd field of current field; MS-R at the 5th subframe uploading data of current field to RS; RS exports the 3rd timesharing dispatch command to MS-R in the first subframe of current field; RS adopts the mode of frequency division multiplexing in the 4th subframe of current field, export control signal to MS-R in same subframe by the channel of different frequency, uploads the data of buffer memory to MR-BS; RS monitors the data that MS-B is uploaded to MR-BS in the 3rd subframe of current field, and with the data buffer storage monitored in RS.
Step 502: multi-hop base station is exported the second timesharing dispatch command to MS-B, and relaying is exported the 3rd timesharing dispatch command to MS-R;
MR-BS generates the second timesharing dispatch command according to the first timesharing dispatch command; The second timesharing dispatch command comprises: to MR-BS, MS-B stops uploading data to MR-BS in the 5th subframe of current field to MS-B at the 3rd subframe of current field and the 4th subframe uploading data.
RS generates the 3rd timesharing dispatch command according to the first timesharing dispatch command; The 3rd timesharing dispatch command is that MS-R stops uploading data to RS in the 3rd subframe of current field, transfers data to RS in the 5th subframe of current field.
RS generates control signal according to the first timesharing dispatch command; Control signal is that relaying feeds back to the signaling that is indicated whether correct receive data by the portable terminal of relay services.
MR-BS exports the second timesharing dispatch command to MS-B in the first subframe of current field; RS exports the 3rd timesharing dispatch command to MS-R in the first subframe of current field.
Step 503: multi-hop base station receives the data that MS-B uploads, and relaying is monitored the data that MS-B is uploaded to multi-hop base station;
MS-B is according to the second timesharing dispatch command, at the 3rd subframe uploading data of current field to MR-BS; RS monitors the data that MS-B is uploaded to MR-BS according to the first timesharing dispatch command in the 3rd subframe of current field, will monitor the data buffer storage of acquisition in RS.
In the 3rd subframe of current field, MS-R stops uploading data to RS according to the 3rd timesharing dispatch command, and therefore, but the RS interference-free is monitored the data from MS-B; If the monitoring of relaying success data, relaying can be with the data that monitor to obtain as the data upload of supplementary to MR-BS, strengthen the reliability of MS-B transfer of data and improve the availability of frequency spectrum.The data of this supplementary can be encoded to mixed self-adapting according to Trunk Characteristics and retransmit a class, two classes or three classes (being HARQ I, II or III) data block.
Step 504: it is data cached to the multi-hop base station that relaying adopts frequency division multiplexing to upload, and exports the 4th time-division dispatch command to MS-R;
In the present embodiment, have data and current field the 3rd subframe that monitor function and support stores last field among the RS of cooperative communication the 5th subframe uploads and monitor the data that MS-B obtains; RS adopts the mode of frequency division multiplexing in the 4th subframe of current field, will store data upload to MR-BS in same subframe by different frequency channels, exports control signal to MS-R.RS adopts the mode of frequency division multiplexing in the 4th subframe of current field, both effectively utilized frequency resource, has avoided again the interference that produces between the down link of the up link of RS and MR-BS and RS and MS-R.
MR-BS adopts the mode of frequency division multiplexing in the 4th subframe of current field, receive the data that MS-B and RS upload in same subframe by different frequency channels; MR-BS adopts the mode of frequency division multiplexing, has both effectively utilized frequency resource, has avoided again the interference that produces between the up link of the up link of MS-B and MR-BS and RS and MR-BS.
Step 505: relaying adopts frequency division multiplexing to receive the data that MS-R uploads, and receives the first timesharing dispatch command of multi-hop base station output;
RS adopts the method for frequency division multiplexing in the 5th subframe of current field, receive the data that MS-R uploads in same subframe by different frequency channels, receives the first timesharing dispatch command of MR-BS output.RS adopts the mode of frequency division multiplexing in the 5th subframe of current field, both effectively utilized frequency resource, has avoided again the interference that produces between the up link of the down link of MR-BS and RS and MS-R and RS.
The first timesharing dispatch command that RS obtains in the 5th subframe of current field is identical with the first timesharing dispatch command in the step 501.
If MR-BS, RS, MS-B and MS-R proceed data and command, then repeated execution of steps 501 is to step 505.
Step 506: finish.
In above-mentioned the first preferred embodiment and the second preferred embodiment, if MR-BS to the RS the transmission of data, then MR-BS can export data and the first timesharing dispatch command to RS in the 5th subframe of each field.
In above-mentioned the first preferred embodiment and the second preferred embodiment, in same field, can not exist MS-B and MS-R in MS-R that same subframe uploading data causes to RS uplink access link and MS-B to the uplink interference problem between the uplink access link of MR-BS.In the embodiment of the invention, MS-B according to the second timesharing dispatch command at the 3rd subframe uploading data of current field to MR-BS, this moment, MS-R stopped to transfer data to RS according to the 3rd timesharing dispatch command in the 3rd subframe of current field; MS-B stops uploading data to MR-BS according to the second timesharing dispatch command in the 5th subframe of current field, this moment MS-R according to the 3rd timesharing dispatch command at the 5th subframe uploading data of current field to RS; The described method of the present embodiment avoided MS-B and MS-R at MS-R that same subframe uploading data causes to the uplink access link of RS and MS-B to the interference between the uplink access link of MR-BS.
In above-mentioned the first preferred embodiment and the second preferred embodiment, control signal comprises the relevant signaling (ACK/NACK) of mixed automatic retransfer (HARQ), be used for whether correctly receive data of RS instruct MS-R, if receive data, issue the indication of ACK signaling and received uploading data, otherwise, issue the indication of NACK signaling and do not receive data.What comprise in this control signal is a small amount of control information; In system, exist some Resource Block that split can transmit these control informations, thus guarantee not exist MS-B to the uplink access link of MR-BS to the interference between the descending access link that is relayed to MS-R.The in good time transmission of this control signal in the 4th subframe of current field is conducive to shorten Time Delay of Systems.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of avoiding uplink channel interference is characterized in that, the method comprises:
A, multi-hop base station are exported the first timesharing dispatch command to relaying, and the portable terminal that the indication of described the first timesharing dispatch command is served by the portable terminal of relay services and by the base station is in the different time-gap uploading data;
B, multi-hop base station export the second timesharing dispatch command to served by the base station portable terminal, described the second timesharing dispatch command generates according to the first timesharing dispatch command, and also there is the time slot that stops to the multi-hop base station uploading data in the portable terminal uploading data time slot that exists indication to be served by the base station;
Relaying will generate according to the first timesharing dispatch command and indication is exported to by the portable terminal of relay services by the portable terminal uploading data time slot of relay services and the 3rd timesharing dispatch command and the control signal that stop the uploading data time slot;
The data that the portable terminal that C, multi-hop base station reception are served by the base station is uploaded at the time slot of the portable terminal uploading data of being served by the base station receive the data of being uploaded by relaying in different time-gap by the portable terminal of relay services.
2. method according to claim 1 is characterized in that,
Described the first timesharing dispatch command of steps A exports relaying at last field to by multi-hop base station;
Described the first timesharing dispatch command comprises: stopped uploading data to relaying by the portable terminal of relay services in the 3rd subframe of current field; By the portable terminal of relay services at the 5th subframe uploading data of current field to relaying; Relaying is exported the 3rd timesharing dispatch command extremely by the portable terminal of relay services in the first subframe of current field; Relaying adopts the mode of frequency division multiplexing in the 4th subframe of current field, export control signal to by the portable terminal of relay services in same subframe by the channel of different frequency, uploads the data of buffer memory to the multi-hop base station;
Described the second timesharing dispatch command comprises: to the multi-hop base station, the portable terminal of being served by the base station stops uploading data to the multi-hop base station in the 5th subframe of current field to the portable terminal of being served by the base station at the 3rd subframe of current field and the 4th subframe uploading data;
Described the 3rd timesharing dispatch command is for to be stopped uploading data to relaying by the portable terminal of relay services in the 3rd subframe of current field, at the 5th subframe uploading data of current field to relaying.
Described control signal is that relaying feeds back to the signaling that is indicated whether correctly to receive the data of being uploaded by the portable terminal of relay services by the portable terminal of relay services.
3. method according to claim 2 is characterized in that,
The time slot of the described portable terminal uploading data of being served by the base station of step B comprises: the 3rd subframe of the current field of indication uploading data and the 5th subframe of the current field that indication stops uploading data;
The described time slot by the portable terminal uploading data of relay services of step B comprises: indication stop uploading data current field the 3rd subframe and indicate the 5th subframe uploading data of current field.
4. method according to claim 2 is characterized in that,
The time slot of the described portable terminal uploading data of being served by the base station of step C comprises: the 3rd subframe of the current field of indication uploading data and the 5th subframe of the current field that indication stops uploading data;
The described different time-gap of step C comprises that indication is stopped the 3rd subframe of current field of uploading data and the 5th subframe of current field of indication uploading data by the portable terminal of relay services.
5. method according to claim 2, it is characterized in that, described the first timesharing dispatch command further comprises: relaying is monitored the data that the portable terminal of being served by the base station is uploaded to multi-hop base station in the 3rd subframe of current field, and with the data buffer storage monitored in relaying.
6. method according to claim 5 is characterized in that, step C further comprises:
Multi-hop base station receive that relaying uploads in the data of monitoring time slot and obtaining, described relaying is monitored the data that the portable terminal of being served by the base station is uploaded to multi-hop base station monitoring time slot to monitor data that time slot obtains be relaying.
7. method according to claim 6 is characterized in that,
The time slot of the described portable terminal uploading data of being served by the base station of step B comprises: the 3rd subframe of the current field of indication uploading data and the 5th subframe of the current field that indication stops uploading data;
The described time slot by the portable terminal uploading data of relay services of step B comprises: indication stop uploading data current field the 3rd subframe and indicate the 5th subframe uploading data of current field.
8. method according to claim 6 is characterized in that, step C comprises:
The time slot of the described portable terminal uploading data of being served by the base station of step C comprises: the 3rd subframe of the current field of indication uploading data and the 5th subframe of the current field that indication stops uploading data;
The described different time-gap of step C comprises that indication is stopped the 3rd subframe of current field of uploading data and the 5th subframe of the current field that indication stops uploading data by the portable terminal of relay services;
The described monitoring time slot of step C is monitored the 3rd subframe of the current field of the portable terminal of being served by the base station for being used for relaying.
9. according to claim 1,2 or 5 described methods, it is characterized in that,
The described different time-gap of steps A comprises: indication stopped uploading data by the portable terminal of relay services and the 3rd subframe of the current field of the portable terminal uploading data of being served by the base station and indication by the portable terminal uploading data of relay services and stopped the 5th subframe of uploading data by the portable terminal that the base station is served.
10. according to claim 1,2 or 5 described methods, it is characterized in that,
Described relaying is in the 4th subframe of current field and the working method of the 5th subframe employing frequency division multiplexing;
Described multi-hop base station adopts the working method of frequency division multiplexing in the 4th subframe of current field.
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| JP2000286775A (en) * | 1999-03-30 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Direct communication method between mobile stations in radio communication system and mobile station using the communication method |
| CN101106807A (en) * | 2006-07-12 | 2008-01-16 | 株式会社Ntt都科摩 | A cellular network based on relay and space division duplex communication method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000286775A (en) * | 1999-03-30 | 2000-10-13 | Matsushita Electric Ind Co Ltd | Direct communication method between mobile stations in radio communication system and mobile station using the communication method |
| CN101106807A (en) * | 2006-07-12 | 2008-01-16 | 株式会社Ntt都科摩 | A cellular network based on relay and space division duplex communication method |
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