CN102387489A - Method for judging affiliation space of terminal and device thereof - Google Patents

Method for judging affiliation space of terminal and device thereof Download PDF

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Publication number
CN102387489A
CN102387489A CN2010102731037A CN201010273103A CN102387489A CN 102387489 A CN102387489 A CN 102387489A CN 2010102731037 A CN2010102731037 A CN 2010102731037A CN 201010273103 A CN201010273103 A CN 201010273103A CN 102387489 A CN102387489 A CN 102387489A
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rru
terminal
bbu
sequence
value
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CN102387489B (en
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李晓皎
张健飞
索士强
韩波
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Abstract

The embodiment of the invention discloses a method for judging an affiliation space of a terminal and a device thereof, relating to the technical field of wireless communication, and reducing the complexity of performing the radio remote unit (RRU) affiliation judgement. In the invention, the terminal RRU affiliation judgement is carried out according to the lead code preamble sequence sent in the process of accessing terminal at random or the reference signal RS sent in the process of dispatching the terminal, and therefore the complexity of terminal RRU affiliation judgement is largely reduced.

Description

Terminal attaching space decision method and equipment
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of terminal attaching space decision method and equipment.
Background technology
The space division multiplexing technology can be widely used in the indoor and outdoors scene, both can be used to promote capacity, message transmission rate and the system spectrum utilance of sub-district, also can be used to improve the covering performance of special screne.For example can make the identical resource of terminal multiplexing of a plurality of floors in the indoor space division multiplexing of carrying out floor gap, thereby significantly improve power system capacity, switch the sub-district when having reduced the terminal cross floor simultaneously.Again such as, outdoor, space division multiplexing is applied to the covering of high-speed railway, can reduce the terminal since in the short time that high-speed mobile causes frequent sub-district switch, effectively improved system's covering performance.
Base station equipment (eNB) is a distributed apparatus, and it is that (Building Base bandUnit, BBU) (Radio Remote Unit, RRU) equipment constitutes, and is a kind of base station combination of can the flexible distributed formula installing for equipment, RF remote unit by indoor Base Band Unit.In essence, code division multiple access (SDMA) technology is exactly to utilize the spatial separation between the different RRUs to realize space division multiplexing, is the identical running time-frequency resource of terminal distribution of ownership different RRUs, thereby reaches the effect that promotes the availability of frequency spectrum and throughput of system.In the ideal case, throughput of system can constantly increase with the growth of multiplexing tuple, and its upper limit only depends on the actual treatment ability of BBU.The realization of SDMA technology needs different RRUs to satisfy certain insulated degree requirement; Mainly realize isolating for indoor SDMA through the penetration loss of floor gap; Outdoorly then can pass through directional antenna and physical distance, for example street covering, cross or T-shaped road junction, high-speed railway etc. are realized isolating.
BBU is a part of being responsible for data processing in the base station, determines the transmission data on each RRU.RRU is the radio-frequency transmissions part of base station; The corresponding RRU of each separate space; A RRU can support the data of one or more passages to send, and each passage can connect one or more antennas, but the data on a plurality of antennas on the same passage are to merge transmission.Port number in each separate space is arranged net relevantly with actual, when being configured to single channel in each separate space, can only adopt the single port transmission, and when being configured to multichannel in each separate space, then can adopt multiport mode transfer such as 2 ports, 4 ports.Link together through optical fiber between BBU and the RRU, a BBU can handle the data on a plurality of RRU simultaneously, and the BBU disposal ability is relevant with number with the integrated circuit board disposal ability among the BBU, and its disposal ability has determined a RRU number that BBU can connect.
The signal processing model of BBU and RRU is referring to Fig. 1; Wherein each RRU can receive the transmission signal at terminal; Measurement module among the BBU is through comparing the reception signal strength signal intensity on each RRU; RRU ownership to the terminal is adjudicated, and promptly judges terminal attaching in which RRU, and submits attaching information to scheduler module.Scheduler module is carried out time-frequency resource allocating to each terminal; For matching at the terminal that can carry out SDMA on the ownership different RRUs; For the identical running time-frequency resource of pairing terminal distribution, send unpaired message and schedule information to measurement module and data reception module simultaneously, be used for next signal and receive.Measurement module is delivered to data reception module according to previous unpaired message with corresponding measurement data, is used for terminal data and detects.Scheduler module is sent to data transmission blocks with this schedule information simultaneously, is used for confirming the transmission data on each RRU.
It is thus clear that for SDM system, the RRU at terminal ownership judgement is the key of multiple terminals scheduling in the system, reasonably belonging to decision algorithm can provide accurate foundation for scheduling, and the interference value of pairing terminal room is reduced in the controlled scope.
The high-speed packet of existing network inserts and uses the shape-endowing weight value algorithm to carry out the judgement of terminal RRU ownership in (HSPA) system at present; Be the base station pass through on each RRU of shape-endowing weight value (EBB) algorithm computation weights as the judgement foundation; When weights during greater than threshold value; Judge this RRU of terminal attaching, otherwise judge that the terminal does not belong to this RRU, a terminal can belong to a plurality of RRU.Concrete:
At first, use channel estimation method obtain the up channel impulse response h of each subcarrier of certain terminal (k, n); What wherein k represented is terminal serial number, and n representes the subcarrier sequence number, h (k; N) be the matrix of a Nrx*Ntx, Nrx is the terminal number of transmit antennas, and Ntx is the number of RRU;
Then, utilize the EBB algorithm to obtain the shape-endowing weight value on each antenna, method is following:
Channel correlation matrix h to each subcarrier H K, nh K, nAsk the channel correlation matrix R that on average obtains the terminal kThereby the dominant eigenvalue characteristic of correspondence vector of obtaining each terminal is figuration vector V k=eig (R k), (k ka) is the forming coefficient of each RRU to each element w of figuration vector;
At last, judge according to the size of forming coefficient whether the terminal belongs to certain RRU, if | w (k, ka) | 2Greater than threshold value г, then terminal k belongs to antenna ka (being the RRU that terminal k belongs to antenna ka place), otherwise does not belong to antenna ka.
Physical Random Access Channel (PRACH) is the physical channel that use when inserting at random at the terminal, for each sub-district all is assigned 64 lead codes (preamble). sequence, these 64 preamble sequences are produced through cyclic shift by one or more ZC root sequences.When the terminal is inserted at random; Will select the preamble sequence of current area to initiate to insert at random at random; Sequence is relevant through each root sequence is carried out, antenna data merges and peak value detects for base station end; Confirm employed preamble sequence in terminal and received power thereof size, and calculating noise power, whether successfully confirm this time to insert at random through collision detection and the validity judge again.
Demodulated reference signal (DMRS) is a terminal upstream data demodulated reference signal; Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH) all have the demodulated reference signal of oneself; DMRS is made up of the ZC sequence spreading, and sequence length is corresponding with the bandwidth of its respective channels.The known ZC sequence spreading that send through sense terminals the base station obtains terminal channel information.
In realizing process of the present invention, the inventor finds the following technical problem in village in the prior art:
Use the shape-endowing weight value algorithm to carry out the judgement of terminal RRU ownership at present; The defective of this algorithm is that computation complexity is higher, adopts the absolute door limit value to adjudicate the RRU ownership in addition in this algorithm, and confirming of threshold value is comparatively crucial; Too high possibly causing of threshold value can produce than strong jamming its adjacent R RU a little less than the RRU signal of threshold value; Threshold value is crossed to hang down and possibly caused a plurality of RRU of most of terminal attaching, and ownership is judged inaccurate, influences the total capacity of system.
Summary of the invention
The embodiment of the invention provides a kind of terminal attaching space decision method and equipment, is used to reduce the complexity of carrying out the judgement of terminal RRU ownership.
A kind of terminal attaching space decision method, this method comprises:
BBU receives the preamble sequence that a plurality of RRU send; For the preamble sequence that each RRU sends, this preamble sequence is carried out root sequence correlation computations, obtain the corresponding related power sequence of this RRU;
BBU carries out the preamble window with this related power sequence and gets the window operation for the corresponding related power sequence of each RRU that obtains, and the position greater than the performance number of setting threshold value in the preamble window is recorded in this RRU corresponding position information set;
BBU is according to each related power sequence of obtaining, confirms the position of power peak in the corresponding Preamble window of employed Preamble sequence when the terminal is inserted at random;
BBU gathers for each RRU corresponding position information, the position of in this positional information set, searching said power peak, and confirm that when finding the corresponding RRU of this positional information set is the RRU of said terminal attaching.
A kind of terminal attaching space judgment device, this device comprises:
Root sequence correlation unit is used to receive the preamble sequence that a plurality of RRU send, and for the preamble sequence that each RRU sends, this preamble sequence is carried out root sequence correlation computations, obtains the corresponding related power sequence of this RRU;
The thresholding record cell; Be used for for the corresponding related power sequence of each RRU that obtains; This related power sequence is carried out the preamble window get the window operation, and the position greater than the performance number of setting threshold value in the preamble window is recorded in this RRU corresponding position information set;
The peak records unit is used for according to each related power sequence of obtaining, confirms the position of power peak in the corresponding Preamble window of employed Preamble sequence when the terminal is inserted at random;
The ownership identifying unit is used for for each RRU corresponding position information set, the position of in this positional information set, searching said power peak, and confirm that when finding the corresponding RRU of this positional information set is the RRU of said terminal attaching.
A kind of BBU equipment, this equipment comprise above-mentioned terminal attaching space judgment device.
In this programme; The preamble sequence that BBU sends in random access procedure according to the terminal is carried out the judgement of terminal RRU ownership; Carrying out the judgement of terminal RRU ownership with available technology adopting shape-endowing weight value algorithm compares; Need not carry out complex calculation such as matrix exgenvalue decomposition in this programme, greatly reduce the complexity of terminal RRU ownership judgement.
A kind of terminal attaching space decision method, this method comprises:
BBU receives the RS that a plurality of RRU send;
The RS that BBU sends for each RRU carries out uplink channel estimation according to this RS, obtains the up RS measured value of this RRU;
BBU confirms the RRU that the terminal belongs to according to the up RS measured value that obtains.
A kind of terminal attaching space judgment device, this device comprises:
Receiving element is used to receive the reference signal RS that a plurality of RRU send;
The measured value computing unit is used for the RS that sends for each RRU, carries out uplink channel estimation according to this RS, obtains the up RS measured value of this RRU;
The ownership identifying unit is used for confirming the RRU that the terminal belongs to according to the up RS measured value that obtains.
A kind of BBU equipment, this equipment comprise above-mentioned terminal attaching space judgment device.
In this programme; The RS that BBU sends according to the terminal carries out the judgement of terminal RRU ownership; Carry out the judgement of terminal RRU ownership with available technology adopting shape-endowing weight value algorithm and compare, need not carry out complex calculation such as matrix exgenvalue decomposition in this programme, greatly reduce the complexity of terminal RRU ownership judgement.
Description of drawings
Fig. 1 is an eNB signal processing model sketch map of the prior art;
The method flow sketch map that Fig. 2 provides for the embodiment of the invention;
Another method schematic flow sheet that Fig. 3 provides for the embodiment of the invention;
Fig. 4 is the algorithm principle sketch map of the embodiment of the invention one;
The device structure sketch map that Fig. 5 provides for the embodiment of the invention;
Another device structure sketch map that Fig. 6 provides for the embodiment of the invention.
Embodiment
In order to reduce the complexity of carrying out the judgement of terminal RRU ownership, the embodiment of the invention provides a kind of terminal attaching space decision method, in this method, through the preamble sequence that PRACH sends, carries out the judgement of terminal RRU ownership according to the terminal.
Referring to Fig. 2, the terminal attaching space decision method that the embodiment of the invention provides specifically may further comprise the steps:
Step 20:BBU receives the preamble sequence that a plurality of RRU send; For the preamble sequence that each RRU sends, this preamble sequence is carried out root sequence correlation computations, obtain the corresponding related power sequence of this RRU;
Here, the preamble sequence is carried out root sequence correlation computations, is meant preamble sequence and ZC root sequence are carried out the circular convolution computing, the related power sequence that obtains after the circular convolution computing be one with the identical power sequence of ZC root sequence length.
Step 21:BBU is for the corresponding related power sequence of each RRU that obtains; This related power sequence is carried out the preamble window get the window operation; And with in the preamble window greater than the position of the performance number of setting threshold value, be recorded in this RRU corresponding position information set; This position can be the position of performance number in this preamble window, also can be the position in this related power sequence;
Here; Get window when operation the related power sequence being carried out the preamble. window, can be carry out 64 preamble windows get the window operation, mutually deserved; Be with in 64 preamble windows greater than the position of the performance number of setting threshold value, be recorded in this RRU corresponding position information set.
The related power sequence is carried out the preamble window get the window operation, be meant the partial sequence of taking out this related power sequence, the length of this partial sequence is N Cs, N CsBe cyclic shift value, by cell parameter configuration decision, the original position of this partial sequence is by the original position decision of this preamble window, and the end position of this partial sequence is by the end position decision of this preamble window, K PreambleThe original position of individual detection window is:
Start(K preamble)＝mod(N zc-K preamble*N cs，N zc)；
K PreambleThe end position of individual detection window is:
end(K preamble)＝mod(N zc-(K preamble-1)*N cs-1，N zc)；
Wherein, N ZcBe the length of the corresponding preamble sequence of preamble window, K PreambleBe the index of preamble sequence, K Preamble0 and N vValue between-1, N vBe the number of the root sequence preamble sequence of deriving out, support 64 preamble sequences in the sub-district, these sequences can be derived out by one or several root sequence.
The PRACH parameter of current area is depended in the position of 64 preamble windows, does not have overlapping between each preamble window.Under the same ZC root sequence, each preamble window position is continuous, and the original position of first preamble window is the original position of related power sequence, if the element of the related power sequence of whether using, this element all is in after first detection window.
Step 22:BBU is according to each related power sequence of obtaining, confirms the position of power peak in the corresponding preamble window of employed preamble sequence when the terminal is inserted at random; This position can be the position of this power performance number in this preamble window, also can be the position in the related power sequence;
Concrete, each related power sequence that BBU at first will obtain superposes, and then the related power sequence after the stack is carried out the preamble window and get the window operation, and the power peak in definite each preamble window and the position of this power peak; Carry out noise power then and estimate, employed preamble sequence when confirming that according to noise power estimated value and each power peak the terminal is inserted at random, and confirm the position of power peak in the corresponding preamble window of this preamble sequence.
Here, each related power sequence that obtains is superposeed, be meant performance number addition, the performance number of addition result as corresponding position in the related power sequence after superposeing with same position place in each related power sequence.For example, two related power sequences be respectively a1, a2, a3}, b1, b2, b3}, then the related power sequence after the stack is { a1+b1, a2+b2, a3+b3}.Related power sequence after superposeing being carried out the preamble window get the window operation, can be that the window of getting that carries out 64 preamble windows is operated, corresponding, also is the interior power peak of definite 64 preamble windows and the position of this power peak.The method of employed preamble sequence is when confirming that according to noise power estimated value and each power peak the terminal is inserted at random: for the power peak in each preamble window of confirming; Whether the ratio of judging this power peak and noise power estimated value is greater than predefined threshold value; If confirm that then the corresponding pairing preamble sequence of preamble window of this power peak is terminal employed preamble sequence when inserting at random.
Step 23:BBU gathers for each RRU corresponding position information, the position of in this positional information set, searching said power peak, and confirm that when finding the corresponding RRU of this positional information set is the RRU of said terminal attaching.
The preamble sequence that the preamble sequence that BBU receives in the step 20 can be used in initial random access procedure for the terminal.Concrete, BBU receives before the lead code preamble sequence that a plurality of RRU send in step 20, and the request of access at random of carrying the preamble sequence is sent through PRACH in the terminal in initial random access procedure; A plurality of RRU obtain the preamble sequence through demodulation PRACH, and this preamble sequence is sent to BBU, and BBU receives the preamble sequence that a plurality of RRU send.
The preamble sequence that BBU receives in the step 20 can also be that network side needs dispatch terminal and indicating terminal initiation random access procedure, the preamble sequence of using in the random access procedure of terminal according to this indication initiation.Concrete, BBU receives before the lead code preamble sequence that a plurality of RRU send in step 20, and BBU need to confirm dispatch terminal, and indicating terminal is initiated random access procedure; After the terminal receives the indication of BBU, send the request of access at random of carrying the preamble sequence through PRACH; A plurality of RRU obtain the preamble sequence through demodulation PRACH, and this preamble sequence is sent to BBU, and BBU receives the preamble sequence that a plurality of RRU send.
Preferable, above-mentioned after BBU need to confirm the said terminal of scheduling and before the indicating terminal initiation random access procedure, BBU can confirm whether the RRU attaching information at the terminal of the last time record lost efficacy; Lost efficacy if confirm the RRU attaching information at the terminal of the last record, then indicating terminal is initiated random access procedure; Otherwise indicating terminal is not initiated random access procedure.
Above-mentioned BBU confirms whether the RRU attaching information at the terminal of the last record lost efficacy, and its concrete grammar can be following:
BBU confirms whether the current time and the time difference of the time decision of the RRU attaching information at the terminal of the last record surpass predefined time gate limit value; If; The RRU attaching information of then confirming the terminal of the last record lost efficacy; Otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.Perhaps, confirm whether the timer of behind the RRU attaching information at the last time record terminal, opening is overtime, if, confirm that then the RRU attaching information at the terminal of the last record lost efficacy, otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.
Preferable, after step 23, if the RRU attaching information and the time decision at terminal are then write down in the access at random at terminal success, this time decision is for confirming the time of the RRU that the terminal is belonged to.
Setting threshold value in the step 21 is: performance number; Perhaps, the ratio of the power peak in current power value and the current related power sequence; Perhaps, n performance number after each performance number in the current related power sequence sorted according to size order, n is for greater than 0 and less than the integer of the number of current related power performance number that sequence comprises.The current power value is meant current and the performance number of setting in the related power sequence that threshold value compares, and this related power sequence is current related power sequence.
Here, can confirm that concrete emulation mode is following through emulation as the performance number of setting threshold value:
Confirm the covering radius of each RRU according to actual scene, the SRS that simulates then at the terminal of the overlapping region of a plurality of adjacent R RU sends and RRU reception measuring process.Repeatedly spread a little at the terminal, the minimum value of a statistical measures after at every turn spreading (can be the performance number that receives SRS).The minimum value that statistics is obtained is as setting threshold value.
Above-mentioned emulation mode is because there is error in following the example of of overlapping region; The setting threshold value that obtains possibly not be an optimum; Can finely tune according to other a kind of emulation mode; Method is to get the threshold value that above-mentioned emulation obtains setting the both sides of threshold value at certain intervals, and the emulation statistics is set the throughput of SDM system under the threshold value of threshold value and both sides, and the threshold value of throughput maximum is confirmed as final setting threshold value.The setting threshold value that obtains like emulation is 2, and as 0.2 to be the interval, then emulation statistics threshold value is the throughput of 1.8,2,2.2 times SDM systems, then makes the maximum threshold value of throughput confirm as final threshold value.
Referring to Fig. 3, the embodiment of the invention also provides a kind of terminal attaching space decision method, specifically may further comprise the steps:
Step 30:BBU receives the reference signal (RS) that a plurality of RRU send;
The RS that step 31:BBU sends for each RRU carries out uplink channel estimation according to this RS, obtains the up RS measured value of this RRU;
Step 32:BBU confirms the RRU that the terminal belongs to according to the up RS measured value that obtains.
In the step 32, the up RS measured value of each BBU that BBU can measure according to the last time is confirmed the RRU that the terminal belongs to, and its concrete realization can be adopted following three kinds of methods:
First kind; The up RS measured value of each RRU that the last time is obtained sorts from big to small; First up RS measured value after ordering begins; Calculate the ratio (ratio of last up RS measured value and back one up RS measured value in two adjacent up RS measured values) of two adjacent up RS measured values one by one; If this ratio greater than predefined first threshold value, then with the corresponding RRU of each up RS measured value before the back one up RS measured value in two adjacent up RS measured values, is confirmed as the RRU that the terminal belongs to;
Second kind; The up RS measured value of each RRU that obtains for the last time; Peaked ratio in each the up RS measured value that calculates the up RS measured value of this RRU and obtain is if this ratio, confirms then that this RRU is the RRU that the terminal belonged to greater than predefined second threshold value;
The third, whether the up RS measured value of each RRU that obtains for the last time, the up RS measured value of confirming this RRU be greater than predefined the 3rd threshold value, if confirm that then this RRU is the RRU that the terminal belonged to.
In the step 32, BBU can confirm the RRU that the terminal belongs to according to the up RS measured value of each BBU that repeatedly measures, and its concrete realization can be adopted following three kinds of methods:
First kind, for each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; Each mean value that obtains is sorted from big to small; First mean value after ordering begins; Calculate the ratio (ratio of last mean value and back one mean value in two adjacent flat averages) of two adjacent flat averages one by one; If this ratio greater than predefined first threshold value, then with the corresponding RRU of each mean value before back one mean value in two adjacent flat averages, is confirmed as the RRU that the terminal belongs to;
Second kind, for each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; For each mean value that obtains, calculate the peaked ratio in this mean value and each mean value of obtaining, if this ratio, confirms then that the corresponding RRU of this mean value is the RRU that said terminal belonged to greater than predefined second threshold value;
The third, is for each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; For each mean value that obtains, whether confirm this mean value greater than predefined threshold value, if confirm that then the corresponding RRU of this mean value is the RRU that said terminal belonged to.
If do not determine the RRU of terminal attaching, then confirm terminal attaching each RRU in a plurality of RRU according to above-mentioned the whole bag of tricks.
Above-mentioned first threshold value can confirm that a kind of emulation mode is to confirm the covering radius of each RRU according to actual scene through emulation, and the SRS that simulates then at the terminal of the overlapping region of a plurality of adjacent R RU sends and RRU reception measuring process.Repeatedly spread a little at the terminal; After spreading some the measured value on each RRU (can be the performance number that receives SRS) is sorted from big to small at every turn; First measured value after ordering begins, the ratio of two adjacent measured values of statistics (ratio of last measured value and back one measured value in two adjacent measured values).The maximum that statistics is obtained is as being first threshold value.Here, following the example of of overlapping region can respectively get 10% in regional intersection both sides, and 10% is for example here, is not must be 10%, can change according to actual scene, and the number of adjacent space determines according to actual scene.
Above-mentioned emulation mode is because there is error in following the example of of overlapping region; The threshold value that obtains possibly not be an optimum; Can finely tune according to other a kind of emulation mode; Method is to get the threshold value that above-mentioned emulation obtains the both sides of first threshold value at certain intervals, and the throughput of SDM system under the threshold value of first threshold value and both sides is added up in emulation, and the threshold value that throughput is maximum is confirmed as the first final threshold value.First threshold value that obtains like emulation is 2, and as 0.2 to be the interval, then emulation statistics threshold value is the throughput of 1.8,2,2.2 times SDM systems, then makes the maximum threshold value of throughput confirm as final threshold value.
Above-mentioned second threshold value can confirm that a kind of emulation mode is to confirm the covering radius of each RRU according to actual scene through emulation, and the SRS that simulates then at the terminal of the overlapping region of a plurality of adjacent R RU sends and RRU reception measuring process.Repeatedly spread a little at the terminal, the maximum of a statistical measures after at every turn spreading (can be the performance number that receives SRS) and the ratio of minimum value.The maximum that statistics is obtained is as second threshold value.
Above-mentioned emulation mode is because there is error in following the example of of overlapping region; The threshold value that obtains possibly not be an optimum; Can finely tune according to other a kind of emulation mode; Method is to get the threshold value that above-mentioned emulation obtains the both sides of second threshold value at certain intervals, and the throughput of SDM system under the threshold value of second threshold value and both sides is added up in emulation, and the threshold value that throughput is maximum is confirmed as the second final threshold value.Second threshold value that obtains like emulation is 2, and as 0.2 to be the interval, then emulation statistics threshold value is the throughput of 1.8,2,2.2 times SDM systems, then makes the maximum threshold value of throughput confirm as final threshold value.
Above-mentioned the 3rd threshold value can confirm that a kind of emulation mode is to confirm the covering radius of each RRU according to actual scene through emulation, and the SRS that simulates then at the terminal of the overlapping region of a plurality of adjacent R RU sends and RRU reception measuring process.Repeatedly spread a little at the terminal, the minimum value of a statistical measures after at every turn spreading (can be the performance number that receives SRS).The minimum value that statistics is obtained is as the 3rd threshold value.
Above-mentioned emulation mode is because there is error in following the example of of overlapping region; The threshold value that obtains possibly not be an optimum; Can finely tune according to other a kind of emulation mode; Method is to get the threshold value that above-mentioned emulation obtains the both sides of the 3rd threshold value at certain intervals, and the throughput of SDM system under the threshold value of the 3rd threshold value and both sides is added up in emulation, and the threshold value that throughput is maximum is confirmed as the 3rd final threshold value.The 3rd threshold value that obtains like emulation is 2, and as 0.2 to be the interval, then emulation statistics threshold value is the throughput of 1.8,2,2.2 times SDM systems, then makes the maximum threshold value of throughput confirm as final threshold value.
After above-mentioned first threshold value, second threshold value and the 3rd threshold value are confirmed, can measure according to actual scene this value is adjusted.
The RS that BBU receives in the step 30 can be that network side needs dispatch terminal and indicating terminal transmission RS, the RS that send according to this indication at the terminal.Concrete, BBU receives before the RS that a plurality of RRU send in step 30, and BBU need to confirm dispatch terminal, indicates this terminal to send RS; RS is sent after receiving the indication of BBU in the terminal; A plurality of RRU receive said RS, and this RS is sent to BBU, and BBU receives the RS that a plurality of RRU send.
Preferable, after BBU confirms to need dispatch terminal and before the indicating terminal transmission RS, BBU can confirm whether the RRU attaching information at the terminal of the last time record lost efficacy; BBU was if confirming the RRU attaching information at the terminal of the last record lost efficacy, and then indicating terminal sends RS; Otherwise indicating terminal does not send RS.
Above-mentioned BBU confirms whether the RRU attaching information at the terminal of the last record lost efficacy, and its concrete time limit can be following:
BBU confirms whether the current time and the time difference of the time decision of the RRU attaching information at the terminal of the last record surpass predefined time gate limit value; If; The RRU attaching information of then confirming the terminal of the last record lost efficacy; Otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.Perhaps, confirm whether the timer of behind the RRU attaching information at the last time record terminal, opening is overtime, if, confirm that then the RRU attaching information at the terminal of the last record lost efficacy, otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.
Preferable, after step 32, the RRU attaching information and the time decision at record terminal, this time decision is for confirming the time of the RRU that the terminal is belonged to.
In this method, the frequency domain average channel response value that up RS measured value is RS received power value, RS or uplink signal-channel quality indication (CQI) value etc.RS is demodulated reference signal (DMRS) or Sounding Reference Signal (SRS) etc.
The present invention will be described below in conjunction with specific embodiment:
In the terminal attaching space decision method of trigger-type provided by the invention; The validity time of attaching information is confirmed in the base station according to actual scene; As the judgement foundation, the terminal is inserted or when needing dispatch terminal, is triggered decision mechanism initial based on PRACH and RS; When angelica information lost efficacy, open the space ownership judgement flow process at terminal.Therefore different channels exists difference because transmit mechanism is different with reception processing operation on the decision algorithm flow process.Facing terminal initial access and two kinds of situation of dispatch terminal down describes respectively:
PRACH all can be sent in each terminal when initial the access, therefore the PRACH when inserting has at random triggered the space decision mechanism at terminal, and as shown in Figure 4, base station end is following according to the flow process that PRACH adjudicates:
Step 1: the terminal initiates to insert at random, and each RRU carries out demodulation to PRACH and obtains the preamble sequence, and the preamble sequence is sent to BBU;
Step 2: to the preamble sequence that each RRU sends, BBU carries out root sequence correlation computations with this preamble sequence, obtains the related power sequence of this RRU;
Related power sequence to each RRU; BBU operates the window of getting that this preamble sequence is carried out 64 preamble windows; 64 preamble windows are carried out threshold detection respectively, the position greater than the performance number of a certain threshold value in 64 preamble windows is recorded in the positional information set of this RRU.
The related power sequence of each RRU that step 3: BBU will obtain superposes; The power sequence that obtains after the stack is carried out the window of getting of 64 preamble windows and operate, 64 preamble windows are carried out peak power detection respectively, the power peak in 64 preamble windows that record obtains and the position of this power peak.
Step 4: power peak and the noise power estimated value of utilizing step 3 to obtain are carried out preamble access the validity judge; The record judgement is the position of effective preamble sequence; Positional information set on each RRU that obtains in the search step two; If comprise this position in a certain positional information set, then the corresponding RRU of this positional information set confirms as the RRU of terminal attaching.
Step 5: if high level is terminal distribution RNTI success, then the RRU attaching information and the time decision at this terminal are inserted space ownership table,, then delete the PRACH received power information of storage if this inserts not success at random.
After terminal initial inserts at random; The terminal attaching space can be adjudicated according to the RS of its transmission; Its attaching information only needs to upgrade when having service needed to be scheduled for each terminal, so the terminal all possibly trigger the home space judgement in the subframe that is scheduled, and flow process is following:
Step 1: BBU confirms according to the time decision of current time with the RRU attaching information at the terminal of the last record whether the RRU attaching information at this terminal lost efficacy;
Step 2: if BBU confirm to lose efficacy, then indicating terminal sends RS, whole RS of sending of RRU receiving terminals, and the RS that receives sent to BBU; BBU obtains the up RS measured value on each RRU through uplink channel estimation; RS comprises up DMRS and SRS; Up RS measured value includes but not limited to: RS received power value, up CQI value etc.;
Step 3: the mean value of up RS measured value that the base station received according to the last time or the up RS measured value that repeatedly receives carries out the judgement of RRU ownership, and method is following:
Method 1: the measured value of terminal on each RRU sorted from big to small; Begin from first element of formation, calculate the ratio of adjacent two elements one by one; If ratio is greater than certain threshold value, this terminal attaching pairing RRU of each element before a back element then, otherwise terminal attaching all RRU in formation;
Method 2: calculate the ratio of the maximum in measured value and the measured value on each RRU respectively, if ratio greater than certain threshold value, then terminal attaching is in this RRU;
Method 3: travel through all RRU, when the measured value on certain RRU during greater than certain threshold value, then terminal attaching is in this RRU;
Step 4: the base station is the RRU attaching information and the time decision of new terminal more, the judgement when being used for dispatching next time.
Embodiment one:
Step 1: initial random access procedure is initiated through PRACH in the terminal;
Step 2: a plurality of RRU obtain the preamble sequence through demodulation PRACH, and this preamble sequence is sent to BBU;
Step 3:BBU receives the preamble sequence that a plurality of RRU send, and confirms the RRU that the terminal belongs to according to the preamble sequence that receives.The concrete realization of this step can be referring to above-mentioned steps 20-step 23.
After step 3, can also may further comprise the steps:
Step 4: if the RRU attaching information and the time decision at terminal are then write down in the access at random at terminal success.
Embodiment two:
After step 1:BBU confirms to need dispatch terminal, judge whether the RRU attaching information at the terminal of the last record lost efficacy, if then arrive next step; Otherwise this flow process finishes;
Step 2:BBU indicating terminal is initiated random access procedure;
Step 3: the terminal is initiated random access procedure according to the indication of BBU through PRACH;
Step 4: a plurality of RRU obtain the preamble sequence through demodulation PRACH, and this preamble sequence is sent to BBU;
Step 5:BBU receives the preamble sequence that a plurality of RRU send, and confirms the RRU that the terminal belongs to according to the preamble sequence that receives.The concrete realization of this step can be referring to above-mentioned steps 20-step 23.
After step 5, can also may further comprise the steps:
Step 6: if the RRU attaching information and the time decision at terminal are then write down in the access at random at terminal success.
Embodiment three:
After step l:BBU confirms to need dispatch terminal, judge whether the RRU attaching information at the terminal of the last record lost efficacy, if then arrive next step; Otherwise this flow process finishes;
Step 2:BBU indicating terminal sends RS;
Step 3: RS is sent according to the indication of BBU in the terminal;
Step 4: a plurality of RRU receive the RS that send at the terminal, and this RS is sent to BBU;
Step 5:BBU receives the RS that a plurality of RRU send, and confirms the RRU that the terminal belongs to according to the RS that receives.The concrete realization of this step can be referring to above-mentioned steps 30-step 32.
After step 5, can also may further comprise the steps:
Step 6: the RRU attaching information and the time decision at record terminal.
The present invention has extensive applicability, can be used for any SDM system, scene separate space ownership judgement (indoor or outdoors) arbitrarily, duplex system (TDD system or FDD system) arbitrarily.
Referring to Fig. 5, the embodiment of the invention also provides a kind of terminal attaching space judgment device, and this device comprises:
Sequential reception unit 50 is used to receive the preamble sequence that a plurality of RRU send;
Root sequence correlation unit 51 is used for the preamble sequence sent for each RRU that receives, and this preamble sequence is carried out root sequence correlation computations, obtains the corresponding related power sequence of this RRU;
Thresholding record cell 52; Be used for for the corresponding related power sequence of each RRU that obtains; This related power sequence is carried out the preamble window get the window operation, and the position greater than the performance number of setting threshold value in the preamble window is recorded in this RRU corresponding position information set;
Peak records unit 53 is used for according to each related power sequence of obtaining, confirms the position of power peak in the corresponding Preamble window of employed Preamble sequence when the terminal is inserted at random;
Ownership identifying unit 54 is used for for each RRU corresponding position information set, the position of in this positional information set, searching said power peak, and confirm that when finding the corresponding RRU of this positional information set is the RRU of said terminal attaching.
Said peak records unit 53 is used for:
When confirming that according to each related power sequence that obtains the terminal is inserted at random in the corresponding Preamble window of employed Preamble sequence the position of power peak comprise:
Each related power sequence that obtains is superposeed, the related power sequence after the stack is carried out the preamble window get the window operation, and the power peak in definite Preamble window and the position of this power peak;
Carry out noise power and estimate, employed Preamble sequence when confirming that according to noise power estimated value and said power peak the terminal is inserted at random, and confirm the position of power peak in the corresponding Preamble window of this Preamble sequence.
Said sequential reception unit 50 is used for:
Receive the lead code preamble sequence that a plurality of RRU send, this lead code preamble sequence is terminal employed preamble sequence in the initial random access procedure of initiating through Physical Random Access Channel PRACH.
This device also comprises:
Insert indicating member 55 at random, be used for when the said terminal of definite needs scheduling, indicating said terminal to initiate random access procedure;
Said sequential reception unit 50 is used for:
Receive the lead code preamble sequence that a plurality of RRU send, this preamble sequence is said terminal employed preamble sequence in receiving the random access procedure of initiating through PRACH said indication back.
This device also comprises:
Validity judging unit 56 is used for indicating before said terminal initiates random access procedure at the said indicating member that inserts at random, confirms whether the RRU attaching information at the terminal of the last record lost efficacy;
The said indicating member 55 that inserts at random is used for:
When said validity judging unit confirms that the RRU attaching information at the terminal of the last record lost efficacy, indicate said terminal to initiate random access procedure.
Said validity judging unit 56 is used for:
Confirm whether the current time and the time difference of the time decision of the RRU attaching information at the terminal of the last record surpass predefined time gate limit value; If; The RRU attaching information of then confirming the terminal of the last record lost efficacy; Otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.
This device also comprises:
Information recording unit 57 is used for after the success of access at random at said terminal, writing down the RRU attaching information and the time decision at the definite terminal of said ownership identifying unit; This time decision is the current time.
Said setting threshold value is: performance number; Perhaps, the ratio of the power peak in current power value and the current related power sequence; Perhaps, n performance number after each performance number in the current related power sequence sorted according to size order, n is for greater than 0 and less than the integer of the number of current related power performance number that sequence comprises.
The embodiment of the invention also provides a kind of BBU equipment, and this equipment comprises a unit or the combination of any a plurality of unit in the terminal attaching space judgment device shown in Figure 5.
Referring to Fig. 6, the embodiment of the invention also provides a kind of terminal attaching space judgment device, and this device comprises:
Signal receiving unit 60 is used to receive the RS that a plurality of RRU send;
Measured value computing unit 61 is used for the RS that sends for each RRU, carries out uplink channel estimation according to this RS, obtains the up RS measured value of this RRU;
Ownership identifying unit 62 is used for confirming the RRU that the terminal belongs to according to the up RS measured value that obtains.
Said ownership identifying unit 62 is used for:
The up RS measured value of each RRU that the last time is obtained sorts from big to small; First up RS measured value after ordering begins; Calculate the ratio of two adjacent up RS measured values one by one; If this ratio greater than predefined threshold value, then with the corresponding RRU of each up RS measured value before the back one up RS measured value in two adjacent up RS measured values, is confirmed as the RRU that said terminal belongs to; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; Each mean value that obtains is sorted from big to small; First mean value after ordering begins; Calculate the ratio of two adjacent flat averages one by one; If this ratio greater than predefined threshold value, then with the corresponding RRU of each mean value before back one mean value in two adjacent article averages, is confirmed as the RRU that said terminal belongs to; Perhaps,
The up RS measured value of each RRU that obtains for the last time; Peaked ratio in each the up RS measured value that calculates the up RS measured value of this RRU and obtain; If this ratio, confirms then that this RRU is the RRU that said terminal belonged to greater than predefined threshold value; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; For each mean value that obtains, calculate the peaked ratio in this mean value and each mean value of obtaining, if this ratio, confirms then that the corresponding RRU of this mean value is the RRU that said terminal belonged to greater than predefined threshold value; Perhaps,
Whether the up RS measured value of each RRU that obtains for the last time, the up RS measured value of confirming this RRU be greater than predefined threshold value, if confirm that then this RRU is the RRU that said terminal belonged to; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; For each mean value that obtains, whether confirm this mean value greater than predefined threshold value, if confirm that then the corresponding RRU of this mean value is the RRU that said terminal belonged to.
This device also comprises:
Information recording unit 63 is used to write down the RRU attaching information and the time decision at the definite terminal of said ownership identifying unit, and this time decision is the current time.
This device also comprises:
Indicating member 64 is used for when the said terminal of definite needs scheduling, indicating said terminal to send RS;
Said signal receiving unit 60 is used for:
Receive the RS that a plurality of RRU send, this RS is that said terminal is receiving the RS that send said indication back.
This device also comprises:
Validity judging unit 65 is used for before said indicating member is indicated said terminal transmission RS, confirming whether the RRU attaching information at the terminal of the last record lost efficacy;
Said indicating member 64 is used for:
When said validity judging unit confirms that the RRU attaching information at the terminal of the last record lost efficacy, indicate said terminal to send RS.
Said validity judging unit 65 is used for:
Confirm whether the current time and the time difference of the time decision of the RRU attaching information at the terminal of the last record surpass predefined time gate limit value; If; The RRU attaching information of then confirming the terminal of the last record lost efficacy; Otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.
Said up RS measured value is: RS received power, or the frequency domain average channel response of RS, or uplink signal-channel quality indication CQI value.Said RS is: demodulated reference signal DMRS or SRS.
The embodiment of the invention also provides a kind of BBU equipment, and this equipment comprises a unit or the combination of any a plurality of unit in the terminal attaching space judgment device shown in Figure 6.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the invention provides, BBU receives the lead code preamble sequence that a plurality of RRU send, and for the preamble sequence that each RRU sends, this preamble sequence is carried out root sequence correlation computations, obtains the corresponding related power sequence of this RRU; For the corresponding related power sequence of each RRU that obtains, this related power sequence is carried out the preamble window get the window operation, and the position greater than the performance number of setting threshold value in the preamble window is recorded in this RRU corresponding position information set; According to each related power sequence that obtains, confirm the position of power peak in the corresponding preamble window of employed preamble sequence when the terminal is inserted at random; For each RRU corresponding position information set, the position of in this positional information set, searching said power peak, and confirm that when finding the corresponding RRU of this positional information set is the RRU of said terminal attaching.It is thus clear that; The preamble sequence that this programme sends in random access procedure according to the terminal is carried out the judgement of terminal RRU ownership; Carrying out the judgement of terminal RRU ownership with available technology adopting shape-endowing weight value algorithm compares; Need not carry out complex calculation such as matrix exgenvalue decomposition in this programme, greatly reduce the complexity of terminal RRU ownership judgement.
In the scheme that the embodiment of the invention provides, BBU receives the RS that a plurality of RRU send, and the RS for each RRU sends carries out uplink channel estimation according to this RS, obtains the up RS measured value of this RRU; According to the up RS measured value that obtains, confirm the RRU that the terminal belongs to.It is thus clear that; The RS that this programme sends according to the terminal carries out the judgement of terminal RRU ownership; Carry out the judgement of terminal RRU ownership with available technology adopting shape-endowing weight value algorithm and compare, need not carry out complex calculation such as matrix exgenvalue decomposition in this programme, greatly reduce the complexity of terminal RRU ownership judgement.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims (31)

1. terminal attaching space decision method is characterized in that this method comprises:
Indoor Base Band Unit BBU receives the lead code preamble sequence that a plurality of RF remote unit RRU send; For the preamble sequence that each RRU sends, this preamble sequence is carried out root sequence correlation computations, obtain the corresponding related power sequence of this RRU;
BBU carries out the preamble window with this related power sequence and gets the window operation for the corresponding related power sequence of each RRU, and the position greater than the performance number of setting threshold value in the preamble window is recorded in this RRU corresponding position information set;
BBU is according to each related power sequence, confirms the position of power peak in the corresponding Preamble window of employed preamble sequence when the terminal is inserted at random;
BBU gathers for each RRU corresponding position information, the position of in this positional information set, searching said power peak, and confirm that when finding the corresponding RRU of this positional information set is the RRU of said terminal attaching.
2. the method for claim 1 is characterized in that, said BBU is according to each related power sequence, confirms that the position of power peak in the corresponding preamble window of employed preamble sequence when the terminal is inserted at random comprises:
Each related power sequence that BBU will obtain superposes, and the related power sequence after the stack is carried out the preamble window get the window operation, and the power peak in definite preamble window and the position of this power peak;
BBU carries out noise power and estimates, employed preamble sequence when confirming that according to noise power estimated value and each power peak the terminal is inserted at random, and confirm the position of power peak in the corresponding preamble window of this preamble sequence.
3. the method for claim 1 is characterized in that, before BBU received the lead code preamble sequence that a plurality of RRU send, this method further comprised:
The request of access at random of carrying the preamble sequence is sent through Physical Random Access Channel PRACH in said terminal in initial random access procedure;
Said a plurality of RRU obtains the preamble sequence through demodulation PRACH, and this preamble sequence is sent to BBU.
4. the method for claim 1 is characterized in that, before BBU received the lead code preamble sequence that a plurality of RRU send, this method further comprised:
BBU need to confirm the said terminal of scheduling, indicates said terminal to initiate random access procedure;
After said terminal receives the indication of BBU, send the request of access at random of carrying the preamble sequence through PRACH;
Said a plurality of RRU obtains the preamble sequence through demodulation PRACH, and this preamble sequence is sent to BBU.
5. method as claimed in claim 4 is characterized in that, after BBU confirm to need the said terminal of scheduling and indicate before said terminal initiates random access procedure, this method further comprises:
BBU confirms whether the RRU attaching information at the terminal of the last record lost efficacy;
The said terminal of said indication is initiated random access procedure and is comprised:
When the RRU attaching information of BBU at the terminal of confirming the last record lost efficacy, indicate said terminal to initiate random access procedure.
6. method as claimed in claim 5 is characterized in that, whether the RRU attaching information at the terminal of the definite the last record of said BBU lost efficacy and comprise:
BBU confirms whether the current time and the time difference of the time decision of the RRU attaching information at the terminal of the last record surpass predefined time gate limit value; If; The RRU attaching information of then confirming the terminal of the last record lost efficacy; Otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.
7. the method for claim 1; It is characterized in that; Gather for each RRU corresponding position information at BBU; The position of in the set of this positional information, searching said power peak, and confirm that when finding the corresponding RRU of this positional information set is after the RRU of said terminal attaching, this method further comprises:
After the success of access at random at said terminal, write down the RRU attaching information and the time decision at said terminal, this time decision is for confirming the time of the RRU that the terminal is belonged to.
8. like arbitrary described method among the claim 1-7, it is characterized in that said setting threshold value is:
Reception is positioned at the minimum received power value of the reference signal of the terminal of overlapping region of the overlay area of a plurality of adjacent R RU repeatedly sending; Perhaps,
The ratio of the power peak in current power value and the current related power sequence; Perhaps,
N performance number after each performance number in the current related power sequence sorted according to size order, n is for greater than 0 and less than the integer of the number of current related power performance number that sequence comprises.
9. terminal attaching space decision method is characterized in that this method comprises:
Indoor Base Band Unit BBU receives the reference signal RS that a plurality of RF remote unit RRU send;
The RS that BBU sends for each RRU carries out uplink channel estimation according to this RS, obtains the up RS measured value of this RRU;
BBU confirms the RRU that the terminal belongs to according to the up RS measured value that obtains.
10. method as claimed in claim 9 is characterized in that, said BBU confirms that according to the up RS measured value that obtains the RRU that the terminal belongs to comprises:
The up RS measured value of each RRU that the last time is obtained sorts from big to small; First up RS measured value after ordering begins; Calculate the ratio of two adjacent up RS measured values one by one; If this ratio greater than predefined threshold value, then with the corresponding RRU of each up RS measured value before the back one up RS measured value in two adjacent up RS measured values, is confirmed as the RRU that said terminal belongs to; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; Each mean value that obtains is sorted from big to small; First mean value after ordering begins; Calculate the ratio of two adjacent flat averages one by one; If this ratio greater than predefined threshold value, then with the corresponding RRU of each mean value before back one mean value in two adjacent article averages, is confirmed as the RRU that said terminal belongs to; Perhaps,
The up RS measured value of each RRU that obtains for the last time; Peaked ratio in each the up RS measured value that calculates the up RS measured value of this RRU and obtain; If this ratio, confirms then that this RRU is the RRU that said terminal belonged to greater than predefined threshold value; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; For each mean value that obtains, calculate the peaked ratio in this mean value and each mean value of obtaining, if this ratio, confirms then that the corresponding RRU of this mean value is the RRU that said terminal belonged to greater than predefined threshold value; Perhaps,
Whether the up RS measured value of each RRU that obtains for the last time, the up RS measured value of confirming this RRU be greater than predefined threshold value, if confirm that then this RRU is the RRU that said terminal belonged to; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; For each mean value that obtains, whether confirm this mean value greater than predefined threshold value, if confirm that then the corresponding RRU of this mean value is the RRU that said terminal belonged to.
11. method as claimed in claim 9 is characterized in that, before BBU received the reference signal RS that a plurality of RRU send, this method further comprised:
BBU need to confirm the said terminal of scheduling, indicates said terminal to send RS;
RS is sent after receiving the indication of BBU in said terminal;
Said a plurality of RRU receives said RS, and this RS is sent to BBU.
12. method as claimed in claim 11 is characterized in that, after BBU confirm to need the said terminal of scheduling and indicate before said terminal sends RS, this method further comprises:
BBU confirms whether the RRU attaching information at the terminal of the last record lost efficacy;
The said terminal of said indication is sent RS and is comprised:
When the RRU attaching information of BBU at the terminal of confirming the last record lost efficacy, indicate said terminal to send RS.
13. method as claimed in claim 12 is characterized in that, whether the RRU attaching information at the terminal of the definite the last record of said BBU lost efficacy and comprised:
BBU confirms whether current time and the time difference of the time of the RRU attaching information at the last record terminal surpass predefined time gate limit value; If; The RRU attaching information of then confirming the terminal of the last record lost efficacy; Otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.
14. method as claimed in claim 9 is characterized in that, after confirming the RRU that the terminal is belonged to, this method further comprises:
Write down the RRU attaching information and the current time at said terminal.
15., it is characterized in that said up RS measured value is like arbitrary described method among the claim 9-14:
RS received power value, or the frequency domain average channel response value of RS, or uplink signal-channel quality indication CQI value.
16., it is characterized in that said RS is like arbitrary described method among the claim 9-14:
Demodulated reference signal DMRS or Sounding Reference Signal SRS.
17. a terminal attaching space judgment device is characterized in that this device comprises:
Root sequence correlation unit; Be used to receive the lead code preamble sequence that a plurality of RF remote unit RRU send; For the preamble sequence that each RRU sends, this preamble sequence is carried out root sequence correlation computations, obtain the corresponding related power sequence of this RRU;
The thresholding record cell; Be used for for the corresponding related power sequence of each RRU that obtains; This related power sequence is carried out the preamble window get the window operation, and the position greater than the performance number of setting threshold value in the preamble window is recorded in this RRU corresponding position information set;
The peak records unit is used for according to each related power sequence of obtaining, confirms the position of power peak in the corresponding preamble window of employed preamble sequence when the terminal is inserted at random;
The ownership identifying unit is used for for each RRU corresponding position information set, the position of in this positional information set, searching said power peak, and confirm that when finding the corresponding RRU of this positional information set is the RRU of said terminal attaching.
18. device as claimed in claim 17 is characterized in that, said peak records unit specifically is used for:
Each related power sequence that obtains is superposeed, the related power sequence after the stack is carried out the preamble window get the window operation, and the power peak in definite preamble window and the position of this power peak;
Carry out noise power and estimate, employed preamble sequence when confirming that according to noise power estimated value and each power peak the terminal is inserted at random, and confirm the position of power peak in the corresponding preamble window of this preamble sequence.
19. device as claimed in claim 17 is characterized in that, said sequence correlation unit specifically is used for:
Receive the lead code preamble sequence that a plurality of RRU send, this lead code preamble sequence is terminal employed preamble sequence in the initial random access procedure of initiating through Physical Random Access Channel PRACH.
20. device as claimed in claim 17 is characterized in that, this device also comprises:
Insert indicating member at random, be used for when the said terminal of definite needs scheduling, indicating said terminal to initiate random access procedure;
Said sequence correlation unit specifically is used for:
Receive the lead code preamble sequence that a plurality of RRU send, this preamble sequence is said terminal employed preamble sequence in receiving the random access procedure of initiating through PRACH said indication back.
21. device as claimed in claim 20 is characterized in that, this device also comprises:
The validity judging unit is used for indicating before said terminal initiates random access procedure at the said indicating member that inserts at random, confirms whether the RRU attaching information at the terminal of the last record lost efficacy;
The said indicating member that inserts at random specifically is used for:
When said validity judging unit confirms that the RRU attaching information at the terminal of the last record lost efficacy, indicate said terminal to initiate random access procedure.
22. device as claimed in claim 21 is characterized in that, said validity judging unit specifically is used for:
Confirm whether the current time and the time difference of the time decision of the RRU attaching information at the terminal of the last record surpass predefined time gate limit value; If; The RRU attaching information of then confirming the terminal of the last record lost efficacy; Otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.
23., it is characterized in that this device also comprises like arbitrary described device among the claim 17-22:
Information recording unit is used for after the success of access at random at said terminal, writing down the RRU attaching information and the time decision at the definite terminal of said ownership identifying unit, and this time decision is for confirming the time of the RRU that the terminal is belonged to.
24. a terminal attaching space judgment device is characterized in that this device comprises:
Receiving element is used to receive the reference signal RS that a plurality of RF remote unit RRU send;
The measured value computing unit is used for the RS that sends for each RRU, carries out uplink channel estimation according to this RS, obtains the up RS measured value of this RRU;
The ownership identifying unit is used for confirming the RRU that the terminal belongs to according to the up RS measured value that obtains.
25. device as claimed in claim 24 is characterized in that, said ownership identifying unit specifically is used for:
The up RS measured value of each RRU that the last time is obtained sorts from big to small; First up RS measured value after ordering begins; Calculate the ratio of two adjacent up RS measured values one by one; If this ratio greater than predefined threshold value, then with the corresponding RRU of each up RS measured value before the back one up RS measured value in two adjacent up RS measured values, is confirmed as the RRU that said terminal belongs to; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; Each mean value that obtains is sorted from big to small; First mean value after ordering begins; Calculate the ratio of two adjacent flat averages one by one; If this ratio greater than predefined threshold value, then with the corresponding RRU of each mean value before back one mean value in two adjacent article averages, is confirmed as the RRU that said terminal belongs to; Perhaps,
The up RS measured value of each RRU that obtains for the last time; Peaked ratio in each the up RS measured value that calculates the up RS measured value of this RRU and obtain; If this ratio, confirms then that this RRU is the RRU that said terminal belonged to greater than predefined threshold value; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; For each mean value that obtains, calculate the peaked ratio in this mean value and each mean value of obtaining, if this ratio, confirms then that the corresponding RRU of this mean value is the RRU that said terminal belonged to greater than predefined threshold value; Perhaps,
Whether the up RS measured value of each RRU that obtains for the last time, the up RS measured value of confirming this RRU be greater than predefined threshold value, if confirm that then this RRU is the RRU that said terminal belonged to; Perhaps,
For each RRU, the mean value of the up RS measured value of definite this RRU that repeatedly obtains; For each mean value that obtains, whether confirm this mean value greater than predefined threshold value, if confirm that then the corresponding RRU of this mean value is the RRU that said terminal belonged to.
26. device as claimed in claim 24 is characterized in that, this device also comprises:
Information recording unit is used to write down the RRU attaching information and the time decision at the definite terminal of said ownership identifying unit, and this time decision is the current time.
27. device as claimed in claim 24 is characterized in that, this device also comprises:
Indicating member is used for when the said terminal of definite needs scheduling, indicating said terminal to send RS;
Said receiving element specifically is used for:
Receive the RS that a plurality of RRU send, this RS is that said terminal is receiving the RS that send said indication back.
28. device as claimed in claim 27 is characterized in that, this device also comprises:
The validity judging unit is used for before said indicating member is indicated said terminal transmission RS, confirming whether the RRU attaching information at the terminal of the last record lost efficacy;
Said indicating member specifically is used for:
When said validity judging unit confirms that the RRU attaching information at the terminal of the last record lost efficacy, indicate said terminal to send RS.
29. device as claimed in claim 28 is characterized in that, said validity judging unit specifically is used for:
Confirm whether the current time and the time difference of the time decision of the RRU attaching information at the terminal of the last record surpass predefined time gate limit value; If; The RRU attaching information of then confirming the terminal of the last record lost efficacy; Otherwise, confirm that the RRU attaching information at the terminal of the last record did not lose efficacy.
30. an indoor Base Band Unit BBU equipment is characterized in that this equipment comprises arbitrary described device among the claim 17-23.
31. an indoor Base Band Unit BBU equipment is characterized in that this equipment comprises arbitrary described device among the claim 24-29.
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CN103841596A (en) * 2012-11-22 2014-06-04 中兴通讯股份有限公司 Method and apparatus for determining UE ownership AP
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CN108462966B (en) * 2017-02-21 2021-06-15 中国移动通信集团浙江有限公司 2G network-based high-speed rail cell RRU positioning and identifying method and system
CN116133000A (en) * 2022-12-24 2023-05-16 深圳金信诺高新技术股份有限公司 Space division multiplexing method, apparatus, computer device and storage medium
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