CN105407506A - RRU uplink data receiving and processing method and apparatus - Google Patents
RRU uplink data receiving and processing method and apparatus Download PDFInfo
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Abstract
The application discloses an RRU uplink data receiving and processing method comprising the steps in which, an RRU is configured into a plurality of equivalent RRUs for covering different regions; each equivalent RRU receives uplink data transmitted by users, a first layer of the RRU processes the received data by each equivalent RRU and reports to a second layer of the RRU, and the second layer selects the equivalent RRU of the highest receiving signal strength from the equivalent RRUs receiving data from the same user as the target RRU of the same user and transmits the selection result to the first layer; and the first layer transmits the transmitted PUSCH/PUCCH data of the same user by the target RRU to the second layer. The application can be used for expanding the coverage and receiving and processing data reasonably.
Description
Technical field
The application relates to the Remote Radio Technique in communication system, particularly the upstream data receiving handling method of a kind of Remote Radio Unit (RRU) and device.
Background technology
In current wireless access system, usually the Base Band Unit of base station is separated with radio frequency unit, Base Band Unit is fixed on base station site, be called BBU, radio frequency unit is covered comparatively far region by the mode zoomed out, the radio frequency unit zoomed out is called RRU.BBU is responsible for carrying out Base-Band Processing, and and transmission base band between RRU.In the downstream direction, the baseband signal being received from BBU is converted to intermediate frequency by RRU, is converted to radio frequency again, after radio frequency processing, sends to mobile terminal by antenna after carrying out intermediate frequency process; In the upstream direction, the upward signal of the mobile terminal received is carried out radio frequency and intermediate frequency process etc. by RRU, sends to BBU after converting baseband signal to.
Under normal circumstances, a corresponding community of RRU, such cell coverage area is more limited.For expanding the coverage area, introducing the structure that RRU cascade remerges, being linked togather formation community by multiple RRU level, thus expand cell coverage area.But the networking mode of RRU cascade, need multiple RRU, hardware cost is higher.
For reducing networking cost, someone proposes use RRU, carries out path division and the process merged, can reach multiple RRU cascade and merge identical coverage effect, can save hardware cost again simultaneously.The equivalent RRU being split into two 2T2R for the RRU of one 44 receipts (4T4R) remerges, as shown in Figure 1, be the antenna (configuration by antenna port) of two 2T2R by all 4T4R antenna configurations in the RRU of a 4T4R, and be respectively used to cover different regions, such as different floors or line style overlay area, an equivalent RRU is regarded in the covering of each 2T2R as, two cell combining covered by the equivalent RRU of two 2T2R are again a 4T4R community, this process are called merging mode in RRU.Utilize and first divide the process remerged like this, the covering of zones of different can be realized on the one hand by division, increase area coverage; Then can reduce presence of intercell interference by merging on the other hand, reducing the switching of minizone.But corresponding multiple community carried out the PATH division of RRU by above-mentioned process after, becomes a community by cell combining again, in such community, how carrying out data receiver is a problem demanding prompt solution.
Summary of the invention
The application provides upstream data receiving handling method and the device of a kind of RRU, rationally carries out the reception process of upstream data in RRU after can merging.
For achieving the above object, the application adopts following technical scheme:
A upstream data receiving handling method of RRU, comprising:
A RRU is configured to multiple equivalent RRU, for covering zones of different;
Each equivalent RRU receives the upstream data that user sends respectively, the reception data of layer 1 to each equivalent RRU of a described RRU process respectively and report the layer 2 of a described RRU, described layer 2 is in each the equivalent RRU of data receiving same user, select the highest equivalent RRU of received signal strength as the target RRU of described same user, and selection result is sent to described layer 1;
The PUSCH/PUCCH data of the described same user that target RRU sends by described layer 1 send to described layer 2.
Preferably, the Random Access Channel PRACH testing result of each equivalent RRU that reports according to layer 1 of described layer 2 and/or the measurement result of detection reference signal SRS carry out the selection of target RRU.
Preferably, described layer 2 comprises according to the mode of PRACH testing result select target RRU:
Described layer 1 carries out PRACH detection respectively according to the reception data of each equivalent RRU, and when user being detected by an equivalent RRU access, calculate this access user return time delay value or signal energy reports layer 2; Described layer 2 is detecting in each equivalent RRU that same user accesses, and selects to return time delay value is minimum or signal energy the is maximum equivalent RRU target RRU as this access user.
Preferably, described layer 2 comprises according to the mode of the measurement result select target RRU of SRS:
The SRS that described layer 1 receives according to each equivalent RRU, determines the average SINR of full bandwidth that each equivalent RRU is corresponding, and reports described layer 2;
Every the time of setting, described layer 2, in each equivalent RRU of SRS receiving same user, selects the equivalent RRU of full bandwidth average SINR optimum, as the target RRU that described same user is up-to-date.
Preferably, the equivalent RRU that described layer 2 selects full bandwidth average SINR optimum comprises as the target RRU that described same user is up-to-date:
Receive SRS at each equivalent RRU, after layer 1 reports the average SINR of full bandwidth that equivalent RRU is corresponding, described layer 2, in each equivalent RRU of SRS receiving same user, selects the equivalent RRU that the average SINR of current full bandwidth is maximum, line item of going forward side by side; After the detection reference signal of described same user reports number of times to reach the number of times of setting, described layer 2 by being selected a maximum equivalent RRU of number of times, as the target RRU that described same user is up-to-date.
Preferably, when described to be selected the maximum equivalent RRU of number of times be multiple time, the equivalent RRU that the average SINR of full bandwidth selected after being reported by the last SRS is maximum, as the target RRU that described same user is up-to-date.
Preferably, described layer 1 carries out process respectively to the upstream data that each equivalent RRU receives and comprises: the data received each equivalent RRU carry out PRACH detection respectively, antenna channels imbalance detects, DMRS and SRS measures, PUSCH/PUCCH data demodulates.
A upstream data receiving and processing device of RRU, comprising: dispensing unit, data receiver and processing unit, target RRU selected cell.
Described dispensing unit, for being configured to multiple equivalent RRU, for covering zones of different by a RRU;
Described data receiver and processing unit, process for the upstream data received respectively each equivalent RRU, and report target RRU selected cell; PUSCH/PUCCH data also for the target RRU selected by described target RRU selected cell carry out upper strata process.
Described target selection unit, in each the equivalent RRU of data receiving same user, selects the highest equivalent RRU of received signal strength as the target RRU of described same user, and selection result is sent to described data receiver and processing unit.
As seen from the above technical solution, in the application, each equivalent RRU receives the upstream data of user respectively, and the strongest equivalent RRU of the data select signal that layer 2 receives according to each equivalent RRU is as target RRU, and the PUSCH/PUCCH data of target RRU only send to layer 2 to process by layer 1.Like this, one side achieves quorum sensing inhibitor in larger scope by equivalent RRU, simultaneously, on the other hand, selected by the target RRU of layer 2, only subsequent treatment is carried out to the PUSCH/PUCCH data of the strongest target RRU of signal, thus achieve rational data receiver and select process.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the RRU of the previous 4T4R of order is configured to the RRU of two equivalent 2T2R;
Fig. 2 is the basic procedure schematic diagram of upstream data receiving handling method in the application;
Fig. 3 is the schematic diagram that the RRU of a 4T4R in the application carries out upstream data reception;
Fig. 4 is the basic structure schematic diagram of upstream data receiving and processing device in the application.
Embodiment
In order to make the object of the application, technological means and advantage clearly understand, below in conjunction with accompanying drawing, the application is described in further details.
Fig. 2 is the basic procedure schematic diagram of the upstream data receiving handling method of RRU in the application.As shown in Figure 2, the method comprises:
Step 201, is configured to multiple equivalent RRU, for covering zones of different by a RRU.
The process of this step is identical with the existing process that a RRU is carried out PATH division, just repeats no more here.
Step 202, the upstream data that each equivalent RRU carries out user respectively receives.
By the configuration of step 201, each equivalent RRU is distributed in different geographical position by antenna, and the upward signal of UE arrives equivalent RRU through different multipaths.The upstream data that each equivalent RRU carries out user separately receives.
Step 203, the reception data of layer 1 to each equivalent RRU of RRU process respectively and report layer 2, and layer 2, in each equivalent RRU of data receiving same user A, selects the highest equivalent RRU of signal strength signal intensity as the target RRU of user A.
Each equivalent RRU receives upstream data respectively, and layer 1 to receiving data with equivalent RRU for unit processes, and reports layer 2.Particularly, after each antenna receives user uplink data, layer 1 separates different equivalent RRU according to the configuring area of step 201, and the data of each equivalent RRU is carried out combining receiving and demodulating.Such as, the equivalent RRU of two 2T2R that the RRU for 4T4R is equivalent to, be designated as RRU1 and RRU2 respectively, as shown in Figure 3, when carrying out data receiver, two reception antennas (2R) of equivalence RRU1 carry out the reception of all user uplink datas, and two reception antennas (2R) of equivalent RRU2 also carry out the reception of all user uplink datas; Layer 1 is when carrying out reception process, the 2R of equivalent RRU1 is received data carry out combining receiving and demodulating, obtain a demodulation result, the 2R of equivalent RRU2 is received data carry out combining receiving and demodulating, obtain another demodulation result, again two demodulation result are all reported the layer 2 of the RRU of 4T4R, and the equivalent RRU that corresponding mark two demodulation result are corresponding respectively.
Although each equivalent RRU receives the upward signal of UE, but in practice, the UE quality of uplink signal generally only having indivedual equivalent RRU to receive is higher, the signal strength signal intensity that other equivalent RRU receive is more weak, based on this, the equivalent RRU that in the application, selection signal strength signal intensity is the highest is used as the RRU of uplink demodulation, rationally to carry out the process of uplink receiving data.Particularly, layer 2 is in each the equivalent RRU of data receiving same user (such as user A), select the highest equivalent RRU of received signal strength as the target RRU of user A, in the process of subsequent step 204, layer 1 only needs that the PUSCH/PUCCH data of the user A of target RRU institute demodulation are reported layer 2 and processes.
Step 204, layer 2 is by the selection result of target RRU notice layer 1, and the PUSCH/PUCCH data of the user A that target RRU sends by layer 1 send to layer 2 to process.
By the process of step 203, layer 2 selects target RRU in equivalent RRU, notice layer 1, and carries user ID corresponding to this target RRU.Because target RRU receives the strongest equivalent RRU of this subscriber signal, therefore the data demodulates result received by this equivalent RRU should be comparatively accurately, therefore, the PUSCH/PUCCH demodulating data of relative users on target RRU is sent to layer 2 by layer 1, layer 2 is just in the receiving demodulation data of each equivalent RRU, have received demodulation result comparatively accurately, subsequent treatment can be carried out accordingly, the accuracy of data processing can be improved.
So far, the basic skills flow process that the upstream data in the application receives process terminates.By above-mentioned process, equivalence RRU covers different regions respectively by antenna pulling away, the reception data receiver demodulation of layer 1 to up each equivalent RRU, layer 2 carries out the selection of target RRU and inform layer 1, layer 1 reports the demodulation result only reporting target RRU during demodulation result, to improve the accuracy of signal transacting, and then improve systematic function.
In addition, in above-mentioned upstream data receiving handling method, during the layer 2 select target RRU of step 203, can select according to the measurement result of the testing result of Physical Random Access Channel (PRACH) and/or detection reference signal (SRS).Describe in detail respectively below.
1, according to the mode of PRACH testing result select target RRU:
When user initially accesses, layer 1 carries out PRACH detection respectively according to the Received signal strength of each equivalent RRU, and testing result is reported layer 2 respectively.Particularly, as long as layer 1 detects Preamble sequence according to the Received signal strength of certain equivalent RRU, then think and detect that a user is by this equivalent RRU access, then layer 1 calculates the energy returning time delay value or access signal of access user, and reports layer 2.Layer 2, in each the equivalent RRU same user (same Preamble sequence namely being detected) being detected, is selected to return the equivalent RRU that time delay value RTD is minimum or access signal energy is maximum, as target RRU.
2, according to the mode of the measurement result select target RRU of SRS:
After each SRS reports, the SRS that layer 1 receives according to each equivalent RRU, determines the average SINR of full bandwidth that each equivalent RRU is corresponding, and reports layer 2.Every the time (when such as SRS reports number of times to reach set point number) of setting, layer 2 is in each equivalent RRU of SRS receiving same user (such as user A), select the equivalent RRU of full bandwidth average SINR optimum, as the target RRU that user A is up-to-date.Wherein, the determination mode of the equivalent RRU of full bandwidth average SINR optimum can be: receive SRS at each equivalent RRU, after layer 1 reports the average SINR of full bandwidth that equivalent RRU is corresponding, layer 2 is in each equivalent RRU of SRS receiving same user (such as user A), select the equivalent RRU that the average SINR of current full bandwidth is maximum, line item of going forward side by side; After the SRS of user A reports number of times to reach the number of times of setting, layer 2 by being selected a maximum equivalent RRU of number of times, as the equivalent RRU of full bandwidth average SINR optimum.If it is multiple for being selected the maximum equivalent RRU of number of times, preferably, the equivalent RRU that the average SINR of full bandwidth selected after the last SRS can being reported is maximum, as target RRU.
In addition, report because SRS carries out periodicity, meanwhile, user may move at any time, and the distance between each equivalent RRU may change, therefore, during according to SRS measurement result select target RRU, front and back selection result repeatedly may be different, therefore, when selecting a target RRU at every turn, the target RRU selected before all utilizing its renewal.
The mode of above-mentioned two kinds of select target RRU can independently use, and also can combine use.Preferably, when user initially accesses, the target RRU of user can be selected by PRACH testing result; Then, at set intervals, the target RRU of user is upgraded according to SRS measurement result.
The above-mentioned specific implementation being upstream data receiving handling method in the application.In the above-mentioned methods, each equivalent RRU carries out the relevant treatment of up direction respectively, specifically comprises PRACH detection, antenna channels imbalance detects, DMRS and SRS measures, PUSCH/PUCCH data demodulates.Layer 1 is all measured and demodulation the upward signal of each equivalent RRU and channel, and the target RRU that then layer 1 indicates according to layer 2 reports PUSCH/PUCCH demodulating data.In this way, the RRU upstream data reasonably realized in RRU under merging mode receives and process.
Present invention also provides the upstream data receiving and processing device of a kind of RRU, may be used for the upstream data receiving handling method implementing above-mentioned the application.Fig. 4 is the basic structure schematic diagram of upstream data receiving and processing device in the application.As shown in Figure 4, this device comprises: dispensing unit, data receiver and processing unit, target RRU selected cell.
Dispensing unit, for being configured to multiple equivalent RRU, for covering zones of different by a RRU;
Data receiver and processing unit, process for the upstream data received respectively each equivalent RRU, and report target RRU selected cell; PUSCH/PUCCH data also for the target RRU selected by target RRU selected cell carry out upper strata process.
Target RRU selected cell, in each the equivalent RRU of data receiving same user, selects the highest equivalent RRU of received signal strength as the target RRU of same user, and selection result is sent to data receiver and processing unit.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (8)
1. a upstream data receiving handling method of RRU, is characterized in that, comprising:
A RRU is configured to multiple equivalent RRU, for covering zones of different;
Each equivalent RRU receives the upstream data that user sends respectively, the reception data of layer 1 to each equivalent RRU of a described RRU process respectively and report the layer 2 of a described RRU, described layer 2 is in each the equivalent RRU of data receiving same user, select the highest equivalent RRU of received signal strength as the target RRU of described same user, and selection result is sent to described layer 1;
The PUSCH/PUCCH data of the described same user that target RRU sends by described layer 1 send to described layer 2.
2. method according to claim 1, is characterized in that, the Random Access Channel PRACH testing result of each equivalent RRU that described layer 2 reports according to layer 1 and/or the measurement result of detection reference signal SRS carry out the selection of target RRU.
3. method according to claim 2, is characterized in that, described layer 2 comprises according to the mode of PRACH testing result select target RRU:
Described layer 1 carries out PRACH detection respectively according to the reception data of each equivalent RRU, and when user being detected by an equivalent RRU access, calculate this access user return time delay value or signal energy reports layer 2; Described layer 2 is detecting in each equivalent RRU that same user accesses, and selects to return time delay value is minimum or signal energy the is maximum equivalent RRU target RRU as this access user.
4. method according to claim 2, is characterized in that, described layer 2 comprises according to the mode of the measurement result select target RRU of SRS:
The SRS that described layer 1 receives according to each equivalent RRU, determines the average SINR of full bandwidth that each equivalent RRU is corresponding, and reports described layer 2;
Every the time of setting, described layer 2, in each equivalent RRU of SRS receiving same user, selects the equivalent RRU of full bandwidth average SINR optimum, as the target RRU that described same user is up-to-date.
5. method according to claim 4, is characterized in that, the equivalent RRU that described layer 2 selects full bandwidth average SINR optimum comprises as the target RRU that described same user is up-to-date:
Receive SRS at each equivalent RRU, after layer 1 reports the average SINR of full bandwidth that equivalent RRU is corresponding, described layer 2, in each equivalent RRU of SRS receiving same user, selects the equivalent RRU that the average SINR of current full bandwidth is maximum, line item of going forward side by side; After the detection reference signal of described same user reports number of times to reach the number of times of setting, described layer 2 by being selected a maximum equivalent RRU of number of times, as the target RRU that described same user is up-to-date.
6. method according to claim 5, is characterized in that, when described to be selected the maximum equivalent RRU of number of times be multiple time, the equivalent RRU that the average SINR of full bandwidth selected after being reported by the last SRS is maximum, as the target RRU that described same user is up-to-date.
7. according to described method arbitrary in claim 1 to 6, it is characterized in that, described layer 1 carries out process respectively to the upstream data that each equivalent RRU receives and comprises: the data received each equivalent RRU carry out PRACH detection respectively, antenna channels imbalance detects, DMRS and SRS measures, PUSCH/PUCCH data demodulates.
8. a upstream data receiving and processing device of RRU, is characterized in that, comprising: dispensing unit, data receiver and processing unit, target RRU selected cell.
Described dispensing unit, for being configured to multiple equivalent RRU, for covering zones of different by a RRU;
Described data receiver and processing unit, process for the upstream data received respectively each equivalent RRU, and report target RRU selected cell; PUSCH/PUCCH data also for the target RRU selected by described target RRU selected cell carry out upper strata process.
Described target selection unit, in each the equivalent RRU of data receiving same user, selects the highest equivalent RRU of received signal strength as the target RRU of described same user, and selection result is sent to described data receiver and processing unit.
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