CN102438323B - Radio communication device - Google Patents
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- CN102438323B CN102438323B CN201110225162.1A CN201110225162A CN102438323B CN 102438323 B CN102438323 B CN 102438323B CN 201110225162 A CN201110225162 A CN 201110225162A CN 102438323 B CN102438323 B CN 102438323B
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Abstract
The invention provides a radio communication device higher throughput per hour, which comprises a transmission path information acquiring unit and a scheduling unit. The transmission path information acquiring unit acquires interference power value from more than one antenna remote base station. The scheduling unit divides the plurality of antenna remote base stations into several groups according to the acquired interference power value. The time difference between a first timing scheduled during a first period and a second timing scheduled during a second period is determined to be above a third period. The first period is a communication period within the subdistrict of a first group, while the second period is a communication period within the subdistrict of a second group. The third period comprises a period obtaining the interference power value from the remote base station of the subdistrict of the second group.
Description
Technical field
The present invention relates to radio communication.
Background technology
In cellular system, there are radio section and baseband portion from, the scattering device type base station that multiple radio sections is connected by 1 base band part.For example, in the scheduling (user selects and channel allocation) of multiple communities of initial scattering device type base station, imagination is implemented the scheduling of multiple one-piece type base stations in the past simultaneously., implement the scheduling of adjacent multiple communities with same timing.
Patent documentation 1: TOHKEMY 2009-206945 communique
But, between neighbor cell, implement scheduling if use the channel information that can be utilized by existing cellular system simultaneously, in the situation that the timing of implementing is the while in multiple neighbor cells, become the distribution of mutual selfdiscipline channel, the much free time which community all be there is no to the waste of allocated channel occurs.In addition, because the user terminal that mutually brings interference is likely selected simultaneously in neighbor cell, so become the scheduling result that efficiency of frequency employment is lower.
Summary of the invention
The object of a certain viewpoint of the present invention is to provide a kind of radio communication device that can realize higher throughput.
In order to address the above problem, about the radio communication device of a technical scheme of the present invention comprises transmission path information obtaining section and scheduling portion.Transmission path information obtaining section obtains the interference performance number of the interference state that represents transmission path from multiple remote base stations that comprise more than 1 antenna.Scheduling portion is according to interfering performance number, what multiple remote base stations were formed respectively littlely divides into multiple groups, by carry out first period scheduling first timing with this first timing after, carrying out time difference between the second timing of scheduling of the second phase determines as more than between the third phase, above-mentioned first period be in the first Zu community belonging in above-mentioned group, can communicate by letter during, the above-mentioned second phase be in the second Zu community belonging in above-mentioned group, can communicate by letter during, during comprising between the above-mentioned third phase that forming the remote base station that belongs to this second Zu community obtains above-mentioned interference performance number, from being present between user's selecting period of the user who selects allocated channel among more than 1 user terminal in community and will having selected user's result to being assigned with between the notice day of user notification of above-mentioned channel.
Brief description of the drawings
Fig. 1 is the piece figure representing about the radio communication device of execution mode.
Fig. 2 is the piece figure representing about the physical layer signal handling part of execution mode.
Fig. 3 is the figure that represents an example of the scheduling timing of the carrier sense result that uses up link.
Fig. 4 is the figure that represents an example of the scheduling timing of the received power measurement result that uses down link.
Fig. 5 is the figure that represents an example of the scheduling timing of each cell set.
Fig. 6 is the figure that represents an example of the interference coverage area of base station and user terminal.
Fig. 7 is the figure that represents another example of the scheduling timing of each cell set.
Fig. 8 is the figure that represents an example of analog result.
Embodiment
Below, with reference to accompanying drawing, the radio communication device about embodiments of the present invention is explained.In addition, in the following embodiments, be made as and carry out same action about the part of having given identical label, and the repetitive description thereof will be omitted.
In addition, in the present embodiment, imagine single carrier transmission and describe, but for OFDM (Orthogonal Frequency Division Multiplexing, Orthodoxy Frequency Division Multiplex transmission) for the multicarrier transmission of representative, use this OFDM that user terminal multiplexed system on frequency direction and time orientation also can be adopted equally in addition.In addition, be not particularly limited about the multichannel multiplexing method of upper and lower link, can be used in TDD (Time Division Duplex: time division duplex) or FDD (Frequency Division Duplex: Frequency Division Duplexing (FDD)).
With reference to Fig. 1, the radio communication device about present embodiment is described.
About the radio communication device 100 of present embodiment comprises multiple remote base stations (Zhang り goes out base station) 150 and central control unit 101.Remote base station 150 comprises 1 above antenna 151 and simulation part 152.Central control unit 101 comprises physical layer signal handling part 102, scheduling portion 103 and network interface portion 104.In the example of Fig. 1, from remote base station 150-1 till remote base station 150-N (N is more than 2 natural number), N remote base station 150 is connected on central control unit 101.
1 above antenna 151 is connected on 1 remote base station 150, and in the example of Fig. 1, from antenna 151-1 till antenna 151-M (M is more than 2 natural number), M antenna is connected on 1 remote base station 150.
Simulation part 152 corresponds respectively to multiple antennas 151 and exists and antenna 151 equal numbers, in the example of Fig. 1, has from simulation part 152-1 till the M of a simulation part 152-M simulation part 152.
Simulation part 152 when signal sends, from physical layer signal handling part 102 receiving digital signals described later, is analog signal by digital signal conversion, and analog signal is sent to outside via antenna 151.The digital-to-analog of the simulation part 152 when transmission is processed and is used the general structure that comprises digital simulation (D/A) converter and local oscillator circuit, frequency changer, band pass filter, power amplifier to carry out general processing, so omit detailed explanation here.
Simulation part 152 when signal receives receives analog signal via antenna 151, and analog signal is transformed to after digital signal, and digital signal is sent to physical layer signal handling part 102.The analog to digital of the simulation part 152 when reception is processed to use and is comprised that the general structure of band pass filter, power amplifier, local oscillator circuit, frequency changer, analog digital (A/D) converter carries out general processing, so omit detailed explanation here.
Physical layer signal handling part 102 corresponds respectively to multiple remote base stations 150 and has equal number, in the example of Fig. 1, has from physical layer signal handling part 102-1 till N the physical layer signal handling part 102 of physical layer signal handling part 102-N.In addition, also multiple physical layer signal handling parts 102 physically can be installed to same DSP (Digital Signal Processor: digital signal processor) and above carry out processing separately.Details about physical layer signal handling part 102 is narrated in the back with reference to Fig. 2.
Scheduling portion 103 receives and interferes performance numbers and removed about the information bit after the information of physical layer signal processing from physical layer signal handling part 102, and this interference performance number is to represent and the information of the interference state of the transport path of user terminal.Scheduling portion 103 is according to interfering performance number to be divided into groups, so that does not interfere mutually the community being formed by remote base station 150 in the time communicating, generates 1 above cell set.Then scheduling portion 103 determines scheduling timing according to each cell set.So-called scheduling timing, refers to the timing that the result by base station scheduling is started to action to each user notification, each user according to this scheduling result.Interfering performance number as long as calculating the value of degree of interference of transmission path, is that what kind of value can.For example, be to represent that the power measurement result of the up link of each remote base station 150 is the information of the received power measurement result of carrier sense result or the down link that represents each user terminal.
As the information of received power measurement result that represents down link, in XGP (eXtended Global Platform) system, be for example to represent whether the received power of down link exceedes the information of the threshold value of regulation, in IEEE802.16m, be the information that represents CINR (Carrier to Interference plus Noise Ratio: carrier power is to interaction noise power ratio).In addition, in 3GPP LTE, by the information of the MCS from user terminal requests (Modulation and Coding Scheme: Modulation and Coding Scheme) index etc.By these information, can infer the degree that interfere minizone.In addition, in other wireless communication systems, also as long as inferring that the minizone of the channel that carries out data transmission interferes the information of degree of power just passable, it with what kind of form is notified can.
Network interface portion 104 carries out whole control about the data that send according to each user terminal.For example, network interface portion 104 generates the data of each user terminal, or monitors data traffic.
Then, with reference to Fig. 2, physical layer signal handling part 102 is at length described.
Physical layer signal handling part 102 comprises digital signal reception handling part 201, Data Detection portion 202, transmission path information obtaining section 203, data generating unit 204 and digital signal transmission processing portion 205.
Digital signal reception handling part 201 comprises propagation path equalizer, de-mapping device, decoder, comprises as required serial/parallel converter, FFT (Fast Fourier Transform: fast Fourier transform) arithmetic unit, parallel/serial converters, receives weighting multiplier, descrambler, solution bit interleaver etc.Digital signal reception handling part 201 is from simulation part 152 receiving digital signals of remote base station 150, decodes, descrambling, solution bit interleave, demodulation, serial/parallel conversion, FFT, parallel/serial converted etc., and information extraction position.
Data Detection portion 202 receives information bit from digital signal reception handling part 201, will remove about the information of physical layer information processing.The data processing is here owing to carrying out general processing, so omit detailed explanation.
Transmission path information obtaining section 203 receives information bit from digital signal reception handling part 201, calculates the interference performance number of each remote base station 150.In addition, transmission path information obtaining section 203 also can be by the information bit receiving from digital signal reception handling part 201, obtains the information of the received power measurement result of the down link that represents the each user terminal in community.
Data generating unit 204 receives the signal bit sequence of user data or expression control information, the additional information bit about physical layer signal processing from scheduling portion 103.The data processing is here owing to carrying out general processing, so omit detailed explanation.
Digital signal transmission processing portion 205 has mapper, encoder, comprises as required scrambler, bit interleaver, serial/parallel converter, IFFT (Inverse Fast Fourier Transform: high speed inverse Fourier transform) arithmetic unit, parallel/serial converters, sends weighting multiplier.And digital signal transmission processing portion 205 receives signal bit sequence from data generating unit 204, encode, scrambling, bit interleave, modulation, serial/parallel conversion, at a high speed contrary FFT, parallel/serial converted etc., generating digital signal.
In addition, have more than two antenna number at remote base station 150, digital signal reception handling part 201 or digital signal transmission processing portion 205 also can comprise AAA weighted calculation portion and the multiplier for using AAA (Adaptive Array Antenna: adaptive array antenna) to process.AAA processes as long as make the high specific of desired wave maximizes power synthetic (MRC:Maximum Ratio Combining: maximum ratio is synthetic) or make to interfere the zero general method such as sunken of minimum power just passable, so omit detailed explanation here, no matter but be what kind of method, can both not bring impact ground to be used to present embodiment.
Then, with reference to Fig. 3 and Fig. 4, the scheduling of being set by scheduling portion 103 is described.Fig. 3 represents the situation that uses the carrier sense result of up link to dispatch, and Fig. 4 represents the situation that uses the information of the received power measurement result that represents down link to dispatch.
The scheduling of each community is, carrier sense result based on up link, if the interference performance number of the carrier sense result of the up link of certain channel is more than the threshold value of regulation, to not distributing user terminal of this channel, in the case of interfering performance number to communicate less than distributing user terminal the threshold value of regulation.
Now, the size of the communication request that the system of selection of the user terminal to channel allocation also can be based on user terminal is carried out, and also can consider fairness and provide equably communication opportunity to whole user terminals.In addition,, the information of received power measurement result that has obtained the down link that represents each user terminal in transmission path information obtaining section 203, also can use this information to be implemented with the specification of not selecting the user terminal more by amount of interference.User choosing method in the scheduling of each community, as long as using like this one or both in the information that represents the carrier sense result of up link and the received power measurement result of down link to avoid the specification of the interference of minizone, is that what kind of method can.
Scheduling portion 103 is divided into first to N remote base station 150 K the group of first to K (K is the integer below N and more than 2), generates cell set.The scheduling timing of the community that belongs to same cell set is set as the identical moment by scheduling portion 103.Scheduling portion 103 distributes the scheduling timing different according to cell set.In the example of Fig. 3, represent the scheduling timing 301 of (k-1) individual cell set to be set as the different moment from the scheduling timing 302 of k cell set.
The carrier sense of the up link of k cell set starts after the scheduling timing 301 of (k-1) individual cell set.Therefore, will be from the scheduling timing 301 of (k-1) individual cell set till the time difference 314 (Δ t_k) of the scheduling timing 302 of k cell set use formula (1) expression.
[numerical expression 1]
Δt_k≥l_ulcs_k+l_us_k+l_ntf_k (1)
Here, l_ulcs_k belongs to during the carrier sense of up link of the community of k cell set 311, l_us_k is from being present between user's selecting period of selecting the user who communicates among more than 1 user terminal in community 312, and l_ntf_k is between the scheduling result notice day of the result to the scheduling of user terminal notice 313.In addition, preferably the interval of the scheduling timing of different districts group is guaranteed for the time difference is more than 314.
In addition, as shown in Figure 4, the in the situation that of down link, also same with the situation of up link, the scheduling timing 401 of (k-1) individual cell set is set as to the different moment from the scheduling timing 402 of k cell set.Will be from the scheduling timing 401 of (k-1) individual cell set till the time difference 415 (Δ t_k) of the scheduling timing 402 of k cell set use formula (2) expression.
[numerical expression 2]
Δt_k≥l_dlcs_k+l_fb_k+l_us_k+l_ntf_k (2)
Here, l_dlcs_k is during the received power of measuring the received power of the down link of user terminal is measured 411, and l_fb_k is that the received power measurement result of user terminal is to during the feedback of base station feedback 412.In addition, in the case of using the received power measurement result of down link, too, preferably the interval of the scheduling timing of different districts group is guaranteed for the time difference is more than 415.
In addition, the information that represents the carrier sense result of up link and the received power measurement result of down link in the case of using is implemented, scheduling, to meet the relation of formula (3).
[numerical expression 3]
Δt_k≥max(l_ulcs_k，l_dlcs_k+l_fb_k)+l_us_k+l_ntf_k (3)
In the case, depend on during the carrier sense of up link 311 or received power measure during 411 and feedback during in 412 during long side decide the time difference.
Then, describe with reference to an example of the group technology of Tu5Dui community and the scheduling timing of each cell set.
As shown in Figure 5, according to each cell set, in same cell set with from scheduling timing arbitrarily till the set time interval 521 (below also referred to as scheduling interval) of next scheduling timing periodically implement scheduling.In addition, implement scheduling with the reiteration of the first cell set to K.If the time difference 522-1 of Δ t_1 is made as from the scheduling timing 501-K of K cell set till the time of the scheduling timing 501-1 of first cell set, the satisfied following formula (4) of scheduling interval 521 needs.
[numerical expression 4]
In addition, the carrier sense result of line link is implemented in the situation of system of scheduling in the use, if the needed time is respectively l_ulcs, l_us and l_ntf during establishing the carrier sense of up link of whole communities, between user's selecting period and between scheduling result notice day, cell set is counted K and is represented like that suc as formula (5).
[numerical expression 5]
K≤T/(l_ulcs+l_us+l_ntf) (5)
Equally, implement the system of scheduling in the case of using the information of the received power measurement result that represents down link, if establish the received power of whole user terminals measure during and the feedback of the measurement result of received power be respectively l_dlcs_k and l_fb_k during needed, cell set is counted K and is represented like that suc as formula (6).
[numerical expression 6]
K≤T/(l_dlcs+l_fb+l_us+l_ntf) (6)
And then, represent that in the case of using the information of the carrier sense result of up link and the received power measurement result of down link is implemented, scheduling, to represent like that suc as formula (7).
[numerical expression 7]
K≤T/{max(l_ulcs，l_dlcs+l_fb)+l_us+l_ntf} (7)
In addition, the system of measuring in the received power by start down link from the instruction of base station, the base station that belongs to k cell set need to be measured in the received power that the later suitable moment of the scheduling timing of (k-1) individual cell set makes user terminal start down link.If the user terminal requests of establishing the community to belonging to k cell set is by the measurement result of the received power of the down link from base station, to base station, the needed time of reception & disposal that send, request signal is l_rx_k, and the base station of k cell set need to send request signal than the moment of the time T inst shown in the forward formula of the scheduling timing of k cell set (8).
[numerical expression 8]
T
inst=l_rx_k+l_dlcs_k+l_fb_k+l_us_k+l_ntf_k (8)
Then, the group technology of community is described.
Being grouped into of community, if the impact of the interference of minizone be threshold value above; make it belong to different groups.Now, preferably, the degree of the interference of minizone more preferentially makes these communities belong to different groups more greatly.The determination methods of the interference of minizone particularly, both can be used the result of field survey to judge the interference degrees of minizone, can be also to belong to number of users in community to be judged as more at most the impact of interference more.In addition can be also that the nearlyer impact that is judged as interference of remote base station 150 distance is each other larger.And then, also can be by the transfer resume with reference to user terminal, the number of times of transfer is more, and the region overlapping in minizone is more, so it is larger to be judged as the impact of interference.By such determination methods, make each larger community of impact of interfering belong to different groups.
About this grouping, can be used as map colouring problem and processed, can adopt with known frequency and distribute same algorithm.In addition, this packet transaction does not need to carry out continually, as long as in new while laying base station, the time of change, also have and occur to implement larger conversion just passable in transmission environment because of the construction of mansion etc.
Then, with reference to Fig. 6 and Fig. 7, the example about the action of the radio communication device of present embodiment is described.Fig. 6 represents the interference coverage area of down link or the interference coverage area of the up link that user terminal forms that base station forms.Fig. 7 represents an example of the scheduling timing of each cell set.
As shown in Figure 6, base station A, B, C are set respectively, according to formation community, each base station.In addition, interference coverage area 601A, 601B, the 602C of the down link of each base station are represented with solid line.On the other hand, user terminal a, b1, b2, c belong to each base station.Particularly, user terminal a belongs to the community A that base station A forms, and user terminal b1, b2 belong to the community B that base station B forms, and user terminal c belongs to the community C that base station C forms.In addition, interference coverage area 602a, 602b-1,602b-2, the 602c of the up link of each user terminal are dotted.
It is that 3, community A, B, C belong to respectively the different cell set A situation to C that imagination cell set is counted K.
Then, with reference to Fig. 7, the allocation situation of the channel about present embodiment is described.Here, be set as, all cell set is implemented scheduling with identical scheduling interval 731, but the scheduling timing difference of each cell set.
Cell set A scheduling timing 701A, 702A ..., 707A, use the scheduling result tightly implemented at it above, whether decision communicates channel allocation to user terminal.Equally, for cell set B and C, also scheduling timing 701B, 702B ..., 707B, scheduling timing 701C, 702C ..., 707C, use respectively the scheduling result of tightly implementing at it above, determine whether channel allocation is communicated to user terminal.
As shown in Figure 7, imagination belongs to the situation of the data communication 711 of the user terminal a of community A at first at moment 701A.Imagination is during this data communication 711 in process, and user terminal b1 and c have carried out communication request.Now, in community B and community C, in the carrier sense of the up link of implementing respectively in during moment 701A-701B and in during moment 701B-701C, the interference power that user terminal a detected is threshold value above (carrier sense result 721 and 722).Thus, can not allocated channel at cell set B and C scheduling timing 701B and 701C separately.
Here, if the communication of user terminal a finishes at moment 702A, during moment 702A-702B in, in the carrier sense of up link of base station B and the downlink received power of user terminal b1 are measured, can't detect other interference.Thus, user terminal b1 allocated channel is carried out to data communication 712.In addition, in during moment 701B-701C, in the carrier sense of the up link of base station C, can't detect the interference of user terminal b1, in measuring, the downlink received power of user terminal c also can't detect the interference of base station B, so user terminal c allocated channel is carried out to data communication 713 at the scheduling timing 702C of community C.
Here during moment 702A-702B, be the idle period of time which user terminal all be there is no to allocated channel.In method in the past, for example in the case of whole scheduling timings of communities be simultaneously, idle period of time is scheduling interval T, and in the present embodiment, can make idle period of time become shorter than T between schedule periods during.In the scheduling of present embodiment, meet formula (5) by setting and count K to the maximum cell set of the condition of formula (7), can make idle period of time become required Min..
Then, during moment 701B-701C in, although there is the communication request of user terminal a, because user terminal b1 during moment 702C-703A and user terminal c communicate, so interference power more than threshold value detected.Thus, after the data communication 712 and 713 of user terminal b1 and user terminal c finishes respectively, to user terminal a allocated channel, start data communication 714 at scheduling timing 704A.
In addition, sent communication request from user terminal b2 in supposing during moment 703C-704A, and sent communication request from user terminal c in during moment 704A-704B.Now, in community B and community C, in the carrier sense of the up link of implementing respectively in during moment 704A-704B and in during moment 704B-704C, detect that it is threshold value above (carrier sense result 725 and 726) that user terminal a carries out the interference power that data communication 714 brings.Thus, can not allocated channel at each scheduling timing 704B and 704C.
So if the data communication 714 of user terminal a finishes at moment 705A, whichever cell set does not communicate during moment 705A-705B, so select user terminal b2 at scheduling timing 705B, carry out data communication 715.Now, during moment 705B-705C, the interference (carrier sense result 727) of user terminal b2 detected by base station C.Thus, can not select user terminal c at scheduling timing 705C, after the data communication 715 of moment 706B user terminal b2 finishes, to user terminal c allocated channel, carry out data communication 716 at scheduling timing 706C.
In addition, in the case of as method in the past, all the scheduling timing of communities be simultaneously, all identical with cell set A, the initial scheduling timing 706A becoming after the sign off moment of user terminal a 705A selects user terminal b2 and user terminal c simultaneously.In the case, the position relationship in mutual detection interference due to user terminal b2 and base station C, so communication quality variation.On the other hand, in the dispatching method about present embodiment, owing to being provided with skew in the community B of the relation in neighbor cell and the scheduling timing of community C, so can not select mutually to bring user terminal that minizone interferes each other, the communication of each user terminal can maintain higher communication quality simultaneously.
In addition, in the example of Fig. 7, represented in the situation that cell set A has carried out communication, from scheduling timing 701A till during next scheduling timing 702A (scheduling interval) continue example of communication, but to meet scheduling interval, also can send pseudo-data etc. until reach scheduling interval in the data deficiencies that should communicate by letter.
In addition, also can other cell set communicate based on scheduling timing to meet scheduling interval in the data deficiencies that should communicate by letter.For example, in Fig. 7, imagination is from moment 701A till the situation of the sign off of cell set A in during 701B.In the case, according to from moment 701B till the carrier sense result of cell set C in during 701C, which cell set does not all communicate, so cell set C also can carry out at scheduling timing 701C the distribution of channel.
One example of the analog result with reference to Fig. 8 to the radio communication device about present embodiment describes.
The regular hexagon community that imagination is 200m by radius of society configures the model that disposes evenly distributedly 8 user terminals in 27Ge community, Ge community in the plane.Channel model is ITU-R Pedestrian A (3km/h), and the user in scheduling selects to carry out with Proportional Fairness specification.The antenna number of remote base station is 4, and the antenna number of user terminal is 1, carries out zero of MMSE (Minimum Mean Square Error: minimum mean square error criterion) specification and fall in AAA.The transmitted power of base station and user terminal is distributed as 43dBm and 23dBm.
Previous methods is that whole communities are suitable for scheduling result with every 3 frames of identical scheduling timing, with respect to this, in the dispatching method about present embodiment, be divided into 3 cell set so that neighbor cell is not identical cell set each other, be provided with the skew of 1 frame for the scheduling timing between cell set.Wherein, the carrier sense of up link and the received power of down link are measured 1 frame before scheduling timing and are carried out, and do not consider to use Fig. 3 and Fig. 4 to carry out above-mentioned other and process the needed time.
As shown in Figure 8, by the user of down link CDF (Cumulative Distribution Function: cumulative distribution function) expression for SINR.Curve 801 is previous methods, and curve 802 is the dispatching methods about present embodiment.If comparison curves 801 and curve 802, curve 802 user SINR compared with curve 801 has improved about 1.5dB.In addition, the throughput of community entirety improves 11.4%.
According to the present embodiment shown in above, the degree of interfering according to minizone by the community that base station is formed is grouped into multiple cell set, set different scheduling timings according to each cell set, the free time that can cut the waste thus, and effectively carry out the avoiding interference of minizone, can improve efficiency of frequency employment, realize higher throughput.
Some embodiments of the present invention have been described, but these execution modes point out as an example, and do not mean that restriction scope of invention.These new execution modes can be implemented with other various forms, can carry out various omissions, substitute, change in the scope of purport that does not depart from invention.These execution modes and distortion thereof are included in scope of invention and purport, and are included in the invention and its scope being equal to described in claims.
Label declaration
100 radio communication devices, 101 central control units, 102 physical layer signal handling parts, 103 scheduling portions, 104 network interface portions, 150 remote base stations, 151 antennas, 152 simulation parts, 201 digital signal reception handling parts, 202 Data Detection portions, 203 transmission path information obtaining sections, 204 data generating units, 205 digital signal transmission processing portions, 301, 302, 401, 402, 501, 701A～C, 702A～C, 703A～C, 704A～C, 705A～C, 706A～C scheduling timing (moment), during 311 carrier senses, between 312 user's selecting periods, between 313 scheduling result notice daies, 314, 415, 522 time differences, during 411 received powers are measured, during 412 feedbacks, 521, 731 scheduling intervals, 601A, 601B, 601C base station, 602A, 602B, 602C, 604a, 604b, 604c interferes coverage area, 603a, 603b-1, 603b-2, 603c user terminal, 711～716 data communication, 721～727 carrier sense results, 801, 802 curves.
Claims (10)
1. a radio communication device, is characterized in that,
Possess:
Transmission path information obtaining section, obtains the interference performance number of the interference state that represents transmission path from multiple remote base stations that comprise more than 1 antenna; And
Scheduling portion, according to above-mentioned interference performance number, what above-mentioned multiple remote base stations were formed respectively littlely divides into multiple groups, and the first timing of scheduling and the second timing of scheduling after this first timing, that carry out the second phase of first period are carried out in decision, above-mentioned first period be in the first Zu community belonging in above-mentioned group, can communicate by letter during, the above-mentioned second phase be in the second Zu community belonging in above-mentioned group, can communicate by letter during;
Time difference between above-mentioned the first timing and above-mentioned the second timing be between the third phase more than, between the above-mentioned third phase, comprise form the remote base station that belongs to this second Zu community obtain interfere performance number during, from being present between user's selecting period of the user who selects allocated channel among more than 1 user terminal in community and will having selected user's result to being assigned with between the notice day of user notification of above-mentioned channel.
2. radio communication device as claimed in claim 1, is characterized in that, above-mentioned scheduling portion in the case of the interference performance number between the first community and the second community be more than threshold value, make above-mentioned the first community and above-mentioned the second community belong to different groups.
3. radio communication device as claimed in claim 1, it is characterized in that, above-mentioned scheduling portion in the case of the distance between the first remote base station and the second remote base station be below threshold value, the first community that makes to belong to above-mentioned the first remote base station and the second community that belongs to the second remote base station belong to different groups.
4. radio communication device as claimed in claim 1, it is characterized in that, above-mentioned scheduling portion in the case of transfer from the first community to the second community or from above-mentioned the second community to the user of above-mentioned the first community number of times be more than threshold value, make above-mentioned the first community and above-mentioned the second community belong to different groups.
5. radio communication device as claimed in claim 1, is characterized in that,
The scheduling interval of above-mentioned first group equates with the scheduling interval of above-mentioned second group;
Below the value of this constant when above-mentioned scheduling portion is set as by the quantity of group that the time after multiplication by constants doubly becomes below above-mentioned scheduling interval between the above-mentioned third phase.
6. radio communication device as claimed in claim 1, it is characterized in that, between the above-mentioned third phase, comprise, remote base station obtain interfere during performance number be in this remote base station of up link, measure the carrier sense of received power during, above-mentioned up link represents the link from user to this remote base station.
7. radio communication device as claimed in claim 1, it is characterized in that, between the above-mentioned third phase, comprise, remote base station obtain the measurement of interfering the received power that comprises the down link that represents the link from remote base station to user during performance number during and by the measured value of this received power during the feedback from above-mentioned user to above-mentioned remote base station feedback.
8. radio communication device as claimed in claim 1, is characterized in that,
In the remote base station of up link, measure during the carrier sense of received power than during the measurement of the received power of down link with the feedback from above-mentioned user to above-mentioned remote base station feedback by the measured value of this received power during the long situation of sum, sum during comprising above-mentioned measurement between the above-mentioned third phase and during above-mentioned feedback, above-mentioned up link represents the link from user to this remote base station, and above-mentioned down link represents the link from above-mentioned remote base station to user;
During being above-mentioned measurement during above-mentioned carrier sense with above-mentioned feedback during below sum in the situation that, during comprising above-mentioned carrier sense between the above-mentioned third phase.
9. radio communication device as claimed in claim 7 or 8, it is characterized in that, above-mentioned scheduling portion than above-mentioned the first timing forward be added with the needed time of user's reception & disposal request signal between by the above-mentioned third phase after during more than moment, send above-mentioned request signal, this request signal is for asking belonging to the user that can communicate by letter in above-mentioned the first Zu Nei community and send to remote base station the measurement result of received power.
10. a radio communication device, possesses multiple remote base stations and the control part of communicating by letter of controlling above-mentioned multiple remote base stations that comprise 1 above antenna, it is characterized in that,
Above-mentioned control part possesses:
Transmission path information obtaining section, obtains the interference performance number of interference state that represents transmission path from multiple remote base stations; And
Scheduling portion, according to above-mentioned interference performance number, what above-mentioned multiple remote base stations were formed respectively littlely divides into multiple groups, and the first timing of scheduling and the second timing of scheduling after this first timing, that carry out the second phase of first period are carried out in decision, above-mentioned first period be in the first Zu community belonging in above-mentioned group, can communicate by letter during, the above-mentioned second phase be in the second Zu community belonging in above-mentioned group, can communicate by letter during;
Time difference between above-mentioned the first timing and above-mentioned the second timing be between the third phase more than, between the above-mentioned third phase, comprise during forming the remote base station that belongs to this second Zu community obtains above-mentioned interference performance number, from being present between user's selecting period of the user who selects allocated channel among more than 1 user terminal in community and will having selected user's result to being assigned with between the notice day of user notification of above-mentioned channel.
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| JP2010206003A JP5060605B2 (en) | 2010-09-14 | 2010-09-14 | Wireless communication device |
| JP206003/2010 | 2010-09-14 |
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| CN102438323A CN102438323A (en) | 2012-05-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1910949A (en) * | 2003-12-11 | 2007-02-07 | 高通股份有限公司 | Method and apparatus for conveying sector load information to mobile stations |
| CN101499829A (en) * | 2008-01-30 | 2009-08-05 | 普天信息技术研究院有限公司 | Data transmitting method and system under high-speed mobile environment |
| WO2010025286A3 (en) * | 2008-08-28 | 2010-09-02 | Qualcomm Incorporated | DISTRIBUTED DOWNLINK COORDINATED MULTI-POINT (CoMP) FRAMEWORK |
| JP2010200311A (en) * | 2009-02-26 | 2010-09-09 | Mitsubishi Electric Research Laboratories Inc | Method for allocating resource block in orthogonal frequency-division multiple-access network |
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| JP2000253444A (en) * | 1999-02-25 | 2000-09-14 | Nippon Telegr & Teleph Corp <Ntt> | Base station equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1910949A (en) * | 2003-12-11 | 2007-02-07 | 高通股份有限公司 | Method and apparatus for conveying sector load information to mobile stations |
| CN101499829A (en) * | 2008-01-30 | 2009-08-05 | 普天信息技术研究院有限公司 | Data transmitting method and system under high-speed mobile environment |
| WO2010025286A3 (en) * | 2008-08-28 | 2010-09-02 | Qualcomm Incorporated | DISTRIBUTED DOWNLINK COORDINATED MULTI-POINT (CoMP) FRAMEWORK |
| JP2010200311A (en) * | 2009-02-26 | 2010-09-09 | Mitsubishi Electric Research Laboratories Inc | Method for allocating resource block in orthogonal frequency-division multiple-access network |
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| CN102438323A (en) | 2012-05-02 |
| JP5060605B2 (en) | 2012-10-31 |
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