CN101803419B - System and method for implementing uplink transmission by borrowing or sharing spectrums and channel resources of neighbor cells - Google Patents
System and method for implementing uplink transmission by borrowing or sharing spectrums and channel resources of neighbor cells Download PDFInfo
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Abstract
A system and a method for implementing uplink transmission by borrowing or sharing the spectrum and channel resources of the neighbor cells are provided in the present invention. In the above system, one or more terminals located in the edge area of the serving cell share a set of spectrum resources with one or more terminals located in the edge area of the cells neighboring to the serving cell, wherein the set of spectrum resources are allocated to the edge area of the cells by the serving cell and the cells neighboring to the serving cell in a soft frequency multiplexing mode. With the invention, the inter-cell diversity receiving gain could be further achieved, and the area enabling the use of the spectrums of the several neighbor cells could be increased, therefore, the uplink transmission rate and the spectrum efficiency of the terminal within the edge area of the cell could be increased in a larger area.
Description
Technical field
The present invention relates to the communications field, particularly, relate to the uplink system and method for using or sharing adjacent cell spectrum resource and channel resource, it is through the frequency spectrum resource of the adjacent sub-district of using or sharing and the uplink business data that the channel resource receiving terminal sends.
Background technology
Inter-Cell Interference Coordination (Inter-cell Interference Coordination; Abbreviate ICIC as) key problem be to coordinate the use of Radio Resources in a plurality of minizones, need to pay close attention to cell edge (" thecell border requires special attention ") especially.ICIC coordinates space, time and frequency channels resource and power in a plurality of minizones, thereby reduces the interference of adjacent minizone.
The interference coordination technique of time-frequency domain can be divided into static state, time-frequency domain resources semi-static and dynamical fashion is coordinated.Static mode mainly is when carrying out plot planning, confirms through minizone planning.The coordination of resource can be made amendment according to the variation of minizone load and business characteristic, but the time cycle of this change is generally longer.For semi-static mode, the cycle of resource allocation is higher than static mode.For dynamic coordination mode, implement resource allocation with frequent.The gain that dynamical fashion can obtain is the highest, and still, the measurement and the information reporting expense that need are very big, and need frequently carry out real time communication in a plurality of minizones.
A kind of basic scheme that solves presence of intercell interference is " soft-frequency reuse " or " partial frequency multiplexing ".This technology is with OFDM (Orthogonal Frequency Division Multiple; OFDM) all subcarriers of system are divided into the m group; Different neighbor cell selects not on the same group subcarrier as boss's carrier wave of this sub-district; Other subcarriers are as the auxiliary son carrier waves of this sub-district; Boss's carrier wave and auxiliary son carrier waves to each sub-district is provided with the distinct transmit power threshold again, and the transmitting power thresholding of boss's carrier wave is higher than the transmitting power thresholding of auxiliary son carrier waves, and confirms cell boarder with the coverage of boss's carrier wave.What from the cell centre to the cell edge, distribute is boss's carrier wave, and it can cover the scope of whole sub-district; What white space distributed is auxiliary son carrier waves, the inside of its coverage cell.Like this, for inside, sub-district, mainly adopt the auxiliary son carrier waves transmission data of lower-wattage; Because it is closer from the base station; Therefore the terminal can receive this sub-district signal clearly, and because auxiliary son carrier waves power is less, so the interference between the neighbor cell is also smaller; And all adopt high power main carrier transmission data at each neighbor cell fringe region; What be in that the terminal of fringe region mainly receives is boss's carrier wave of different neighbor cells; Because boss's carrier wave non-overlapping of different neighbor cells and be quadrature, so the phase mutual interference will reduce greatly.It is the CN200510068133 one Chinese patent application of " through the power programming of OFDM GSM being coordinated the method for presence of intercell interference " that " soft-frequency reuse " or " partial frequency multiplexing " relevant patented technology has title, and title is the CN200610087983 one Chinese patent application of " uplink channel interference is coordinated in the SFN method, base station, terminal and network ".In the long evolving system standard of present 3G (Third Generation) Moblie this method is being discussed.
The defective of this technology is that the frequency resource of cell edge is restricted, and is difficult to support a large number of users and very high data rate.
For the problem that the frequency resource of alleviating the cell edge that " soft-frequency reuse " exist is restricted, a basic thinking is to improve the frequency reuse of cell edge, and that just breaks fringe region fixedly takes coefficient, the restriction as 1/3.Technology motion: 3GPP R1-051059 (Inter-cell interferencemitigation for EUTRA.Texas Instruments; 3GPP RAN WG1 #42bis, SanDiego, California; US; October 2005) thinking providing is exactly: when the load of adjacent sub-district was light, the frequency of using adjacent sub-district improved the transmission rate of the edge termination of this sub-district, and Fig. 1 shows the sketch map of this method.In the R1-051059 scheme, inside, sub-district is can subtract power to use whole frequency ranges, but cell edge no longer be fix 1/3, but adjust according to the difference of edge load between adjacent cell.When certain Cell Edge User more after a little while, its usable frequency will be less than 1/3, simultaneously, when its contiguous cell edge load was heavier, the edge usable frequency of adjacent cell will be above 1/3.If all Cell Edge User loads are all heavier, then the usable frequency of each cell edge all is 1/3.
With reference to Fig. 1, the method for the used frequency soft multiplexing in edge, minizone that the R1-051059 scheme provides is following: suppose that the edge load of sub-district 1 is heavier at first constantly; And the edge load of its 2,4,6 contiguous sub-districts is all lighter, and the edge load of 3,5,7 sub-districts is general, at this moment; 3,5,7 cell edges still take 1/3 frequency range; 2, the edge customer use that the next part frequency is given sub-district 1 is then economized in 4,6 sub-districts, and at this moment, the edge customer of sub-district 1 takies frequency range and surpasses 1/3.The edge load of sub-district 1 is general constantly to have supposed M, and the edge load of its 2,4,6 contiguous sub-districts is heavier; And 3, the edge load of 5,7 sub-districts is all lighter; Then according to this scheme, the 1st cell edge distributes 1/3 original available frequency band, and 3,5,7 sub-districts are then economized the next part frequency and used for 2,4,6 Cell Edge User; At this moment, 2,4,6 Cell Edge User usable frequencies surpass 1/3 original usable frequency.
But said method can not solve the problem that the frequency resource of the cell edge that exists in the soft-frequency reuse technology is restricted fully, therefore, needs a kind of new technical scheme.
Summary of the invention
Consider the soft-frequency reuse that exists in the correlation technique (or partial frequency multiplexing: be positioned at fractionalfrequency reuse) cell edge region the spendable spectral band width in terminal problem and the present invention is proposed; For this reason, the present invention aims to provide a kind of uplink technology of using or sharing adjacent cell spectrum resource and channel resource.
According to an aspect of the present invention, a kind of uplink system that uses or share adjacent cell spectrum resource and channel resource is provided.
This system comprises a plurality of adjacent or contiguous radio node and at least one terminal, and each radio node region covered is a sub-district, and the sub-district at place, terminal is a Serving cell.Wherein, the frequency spectrum resource of the fringe region of sub-district is distributed in one or more terminals and the adjacent sub-district of one or more terminals share Serving cells and the Serving cell of the fringe region of the adjacent sub-district that is positioned at Serving cell that is positioned at the fringe region of Serving cell with the soft-frequency reuse mode.
In said system, the mode of one group of frequency spectrum resource of terminals share has multiple, such as: (1) belongs between the terminal of different districts the mode with the time-division and shares one group of frequency spectrum resource; Wherein, the terminal uses the frequency spectrum resource of the fringe region that belongs to Serving cell and the frequency spectrum resource of the fringe region that belongs to adjacent sub-district to send signal simultaneously; (2) belong between the terminal of different districts mode and share one group of frequency spectrum resource with frequency hopping; Wherein, adopt mutually orthogonal frequency hopping pattern between the terminal of the fringe region of the terminal of the fringe region of Serving cell and adjacent sub-district; (3) belong to the mode of dividing with sky between the terminal of different districts and share one group of frequency spectrum resource.
Further, adjacent or contiguous radio node is with the mode of space diversity, receives the signal that send at the terminal in the fringe region of Serving cell and/or adjacent sub-district.
Preferably, the terminal can be sent business datum as follows: the continuous Resource Block on frequency domain belong to two or more radio nodes is used at the terminal, sends business datum with single carrier mode or OFDM mode; Wherein, two or more radio nodes are selected from the radio node of sub-district, place, terminal and the radio node of adjacent sub-district.Perhaps, business datum also can be sent as follows in the terminal: the discontinuous Resource Block on frequency domain that belongs to two or more radio nodes is used at the terminal, sends business datum with single carrier mode or OFDM mode; Wherein, two or more radio nodes are selected from the radio node of sub-district, place, terminal and the radio node of adjacent sub-district.
In addition, preferably, above-mentioned radio node comprises: the remote radio unit of base station, distributed base station independently; And the antenna of radio node comprises: be arranged in different sites antenna, be arranged in the antenna of the covering zones of different of same site; For the terminal; It comprises transmission channel, receive path, baseband processing unit; Wherein, The bandwidth of transmission channel covers the Serving cell at place, terminal and the part or all of working band of adjacent sub-district simultaneously, and transmission channel can use the frequency spectrum of two or more sub-districts to send signal simultaneously.
According to a further aspect in the invention, a kind of ascending transmission method of using or sharing adjacent cell spectrum resource and channel resource is provided, has been used to comprise a plurality of adjacent or contiguous radio nodes and the system at least one terminal.
Ascending transmission method according to the present invention comprises: the definite set that can participate in the preliminary election adjacent cell radio node of uplink; From the set of preliminary election adjacent cell radio node, select to participate in one or more work radio nodes of uplink; Frequency spectrum resource and occupation mode thereof that the operable one or more work radio nodes in terminal are belonged to the fringe region of sub-district send to the terminal.
The terminal comprises following several kinds to the occupation mode of the frequency spectrum resource of the fringe region of Serving cell and adjacent sub-district: (1) belongs between the terminal of different districts the mode with the time-division and shares one group of frequency spectrum resource; Wherein, the terminal uses the frequency spectrum resource of the fringe region that belongs to Serving cell and the frequency spectrum resource of the fringe region that belongs to adjacent sub-district to send signal simultaneously; (2) belong between the terminal of different districts mode and share one group of frequency spectrum resource with frequency hopping; Wherein, adopt mutually orthogonal frequency hopping pattern between the terminal of the fringe region of the terminal of the fringe region of Serving cell and adjacent sub-district; (3) belong to the mode of dividing with sky between the terminal of different districts and share one group of frequency spectrum resource.
Preferably, network is with the business datum of the mode receiving terminal transmission of grand branch collection.
Preferably, the operation of above-mentioned definite preliminary election adjacent cell radio node collection is specially: the detection collection that is made up of one group of adjacent cell distinguished symbol is sent to the terminal in the base station, wherein, surveys the signal that collection has been specified specific adjacent cell radio node emission; Terminal to report is to surveying the measurement result of the signal that collects appointment; Network side judges according to the measurement result of terminal to report whether the signal quality of respective cell reaches threshold value, and the radio node of sub-district that signal quality is reached threshold value is as the preliminary election adjacent cell radio node that can participate in uplink.
Preferably, the operation of a plurality of work radio nodes of above-mentioned selection is specially: for the corresponding adjacent cell of preliminary election adjacent cell radio node, judge whether to exist resources left according to its overload indication information; Each adjacent cell for there being resources left obtains resource residual amount respectively, and obtains the application resource borrowing amount of its adjacent cell to it; For removing the adjacent cell that the surplus yield of using after the resource still reaches threshold value, with its radio node as the work radio node.
Preferably, ascending transmission method according to the present invention further comprises: network sends to the terminal with resource location and the occupation mode that the terminal belongs to the sub-district; Network is with the signal of the mode receiving terminal transmission of grand branch collection.
Through above-mentioned at least one technical scheme of the present invention; Through not only using the frequency spectrum resource of adjacent cell; Also use its receive path resource; Can further obtain the diversity reception gain of minizone, and through combining the power control measure, can be under the controlled situation of the constant and adjacent area interference of holding frequency spatial reuse general layout; Improve the zone of the frequency spectrum of the operable a plurality of adjacent cells in terminal, thereby can in big zone, improve the uplink speed and the spectrum efficiency at terminal in the cell edge region.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the sketch map according to the minizone frequency borrowing method of correlation technique;
Fig. 2 is the sketch map of uplink system of using or share frequency spectrum resource and the channel resource of adjacent sub-district according to the embodiment of the invention;
Fig. 3 (a) is the sketch map of continuous Resource Block on frequency domain that uses between the terminal according to different districts edge in the instance 1 of the embodiment of the invention and the instance 2;
Fig. 3 (b) is the sketch map of discontinuous Resource Block on frequency domain that uses between the terminal according to different districts edge in the instance 3 of the embodiment of the invention;
Fig. 4 (a) is the flow chart of ascending transmission method of using or share frequency spectrum resource and the channel resource of adjacent sub-district according to the embodiment of the invention;
Fig. 4 (b) be according to the employing of the embodiment of the invention flow chart of using or share the ascending transmission method of adjacent cell spectrum of grand branch collection;
Fig. 5 is the sketch map according to the instance 1 of the ascending transmission method of the embodiment of the invention;
Fig. 6 is the sketch map according to the instance 2 of the ascending transmission method of the embodiment of the invention.
Embodiment
The embodiment of the invention has provided a kind of using or the frequency spectrum resource of shared adjacent sub-district and the scheme that channel resource carries out uplink.
The terminal of mentioning in embodiments of the present invention mainly is meant the terminal that is positioned at cell edge, but is not limited thereto, and the Resource Block of mentioning in the embodiment of the invention can be but be not limited to following any: the 1) frequency spectrum in the corresponding special time interval; 2) sub carrier group in the corresponding special time interval in the orthogonal frequency division multiplexed.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Embodiment one
According to the embodiment of the invention, a kind of uplink system that uses or share adjacent cell spectrum resource and channel resource is provided at first.
Fig. 2 has provided the sketch map according to the uplink system of the embodiment of the invention.As shown in Figure 2; This uplink system comprises that a plurality of adjacent or contiguous radio nodes (have illustrated seven radio node 201a～201g) and at least one terminal and (a terminal (User Equipment who is positioned at sub-district, radio node 201a place have been shown among Fig. 2 among Fig. 2; UE) 202; Wherein, the sub-district at place, terminal can become this sub-district or Serving cell, can be called adjacent sub-district with this sub-district or neighboring cell.Wherein, the Traffic Channel at 203 expression terminals, the Resource Block (BRB1～BRBn) form of its Resource Block (SRB) and other sub-districts of using by Serving cell.
In this system, one or more terminals and the said Serving cell of one or more terminals share of fringe region of the adjacent sub-district that is positioned at said Serving cell that is positioned at the fringe region of Serving cell distributed to one group of frequency spectrum resource of mutual exclusion on frequency domain of the fringe region of said Serving cell with the soft-frequency reuse mode.
Wherein, in said system, the mode of one group of frequency spectrum resource of terminals share has multiple, includes but not limited to following several kinds: (1) belongs between the terminal of different districts the one group of frequency spectrum resource that is shared in mutual exclusion on the frequency domain with the mode of time-division; Wherein, the terminal uses the frequency spectrum resource of the fringe region that belongs to Serving cell and the frequency spectrum resource of the fringe region that belongs to adjacent sub-district to send signal simultaneously; (2) belong between the terminal of different districts the one group of frequency spectrum resource that is shared in mutual exclusion on the frequency domain with the mode of frequency hopping; Wherein, adopt mutually orthogonal frequency hopping pattern between the terminal of the fringe region of the terminal of the fringe region of Serving cell and adjacent sub-district; (3) belong to the mode of dividing with sky between the terminal of different districts and be shared in one group of overlapping on frequency domain frequency spectrum resource.
For the realization of soft-frequency reuse mode, can understand from following two aspects.On the one hand, a sub-district with the soft-frequency reuse mode distribute to cell edge region frequency spectrum resource and adjacent sub-district distribute to frequency spectrum resource mutual exclusion on frequency domain of cell edge region with the soft-frequency reuse mode; On the other hand; The frequency spectrum resource of distributing to cell edge region with the soft-frequency reuse mode of a sub-district is that the loading condition with the center of housing estate zone changes; When the load in center of housing estate zone is light or non-loaded, can be most or all frequency spectrum resources of sub-district as the frequency spectrum resource of giving cell edge region.Under extreme case, when being zero such as the load when adjacent cell, most or all frequency spectrum resources of the sub-district (adjacent sub-district) adjacent with its sub-district, place are used at one or one group terminal that is positioned at this cell edge region.
Below will further describe working method through instance according to the uplink system of the embodiment of the invention.
Instance 1
Terminal 202 uses the continuous resource on frequency domain that belongs to two or more radio nodes (above-mentioned node is selected from the radio node (201b, 201g, 201f) of adjacent cell and the radio node 201 of sub-district, 202 place, terminal) to determine, and sends business datum with the single carrier mode.And the terminal 202b in the fringe region of terminal 202a and radio node 201g cell covered shares the frequency spectrum resource of the fringe region of radio node 201a, 201b, 201g, 201f with time division way.In a special time interval of 1 beginning constantly, terminal 202a uses the frequency spectrum of this sub-district and adjacent cell to send data, and in a special time interval of 2 beginnings constantly, terminal 202b uses the frequency spectrum of this sub-district and adjacent cell to send data.
Further; When 202a or terminal 202b send data at the terminal; The signal that network can use the receive path of above-mentioned radio node 201a, 201b, 201g, 201f to come receiving terminal to send with the mode of space diversity is to improve the spectrum efficiency of uplink.
Instance 2
The continuous resource piece on frequency domain that belongs to two or more radio nodes (above-mentioned node is selected from the radio node (201b, 201g, 201f) of adjacent cell and the radio node 201 of sub-district, 202 place, terminal) is used at terminal 202, sends business datum with OFDM (OFDM) mode.And the terminal 202b in the fringe region of terminal 202a and radio node 201g cell covered shares the frequency spectrum resource of the fringe region of radio node 201a, 201b, 201g, 201f with time division way.In a special time interval of 1 beginning constantly, terminal 202a uses the frequency spectrum of this sub-district and adjacent cell to send data, and in a special time interval of 2 beginnings constantly, terminal 202b uses the frequency spectrum of this sub-district and adjacent cell to send data.
Further; When 202a or terminal 202b send data at the terminal; The signal that network can use the receive path of above-mentioned radio node 201a, 201b, 201g, 201f to come receiving terminal to send with the mode of space diversity is to improve the spectrum efficiency of uplink.
Wherein, Fig. 3 (a) shows the Resource Block set of the fringe region of radio node 201a-201g coverage cell, and shown in Fig. 3 (a), RBa, RBb, RBf..., RBg are continuous.Particularly, in the moment 1, terminal 202a is used to send this sub-district of data and the frequency spectrum of adjacent cell is continuous, and in the moment 2, terminal 202b is used to send this sub-district of data and the frequency spectrum of adjacent cell also is continuous.
The discontinuous Resource Block on frequency domain that belongs to two or more radio nodes (above-mentioned node is selected from the radio node (201b, 201g, 201f) of adjacent cell and the radio node 201 of sub-district, 202 place, terminal) is used at terminal 202, perhaps sends business datum with the OFDM mode with the single carrier mode.
Wherein, Fig. 3 (b) shows the Resource Block set of the fringe region of radio node 201a-201g coverage cell.Shown in Fig. 3 (b), RBb, RBf..., RBg are discontinuous.At time interval 1: terminal 202a and 202b use a kind of Resource Block combination to realize that signal separately sends respectively; At time interval 2: terminal 202a and 202b use another kind of Resource Block combination to realize that signal separately sends respectively.
In the process of frequency hopping, network can use above-mentioned radio node to carry out space diversity reception, to improve the spectrum efficiency of uplink.
Preferably, in above-mentioned uplink system, can be independently base station (traditional base station that comprises radio frequency and Base-Band Processing) for radio node, also can be distributed base station remote radio unit (Remote Radio Unit, RRU); And the antenna of radio node can be the antenna that is arranged in different sites, also can be the antenna that is arranged in the covering zones of different (sector) of same site.
For the terminal; The terminal, it comprises transmission channel, receive path, baseband processing unit, wherein; The bandwidth of transmission channel covers the part or all of working band of sub-district, place, terminal and adjacent sub-district simultaneously, and transmission channel can use the frequency spectrum of two or more sub-districts to send signal simultaneously.In addition; The terminal is when network (through Control Node) reporting channel quality indication (CQI:Channel Quality Indication) data; Both report the channel quality indication (CQI) information on this sub-district radio node frequency spectrums of operation, also reported the channel quality indication (CQI) information on the radio node frequency spectrums of operation of adjacent sub-district.
Embodiment two
According to the embodiment of the invention, a kind of ascending transmission method of using or sharing adjacent cell spectrum resource and channel resource is provided, it can be applied to comprise a plurality of adjacent or contiguous radio nodes and the system at least one terminal.
Fig. 4 (a) has provided the flow chart according to the ascending transmission method of the embodiment of the invention.Shown in Fig. 4 (a), can comprise following processing:
Step S402, the definite set that can participate in the preliminary election adjacent cell radio node of uplink;
Step S404, one or more work radio nodes of from the set of preliminary election adjacent cell radio node, selecting to participate in uplink;
Step S406, frequency spectrum resource and occupation mode thereof that the operable one or more work radio nodes in terminal are belonged to the sub-district send to the terminal.
Fig. 4 (b) has provided according to the employing of the embodiment of the invention using of grand branch collection or has shared the flow chart of the ascending transmission method of adjacent cell spectrum resource and channel resource.Shown in Fig. 4 (b), can comprise following processing:
Step S402, the definite set that can participate in the preliminary election adjacent cell radio node of uplink;
Step S404, one or more work radio nodes of from the set of preliminary election adjacent cell radio node, selecting to participate in uplink;
Step S406, frequency spectrum resource and occupation mode thereof that the operable one or more work radio nodes in terminal are belonged to the sub-district send to the terminal;
Step S408, network is with the signal (business datum) of the mode receiving terminal transmission of grand branch collection.
Below will with Fig. 4 (b) illustrate according to the employing of the embodiment of the invention ascending transmission method of grand branch collection each treatment step of above-mentioned ascending transmission method is described in further detail.
(1) step S402
At first; The detection collection that is made up of one group of adjacent cell distinguished symbol is sent in the base station to the terminal; Wherein, survey the signal that collection has been specified specific adjacent cell radio node emission, like the characteristic parameter (like frequency, coded system, measurement window etc.) of pilot signal or synchronizing signal; Terminal to report is to surveying the measurement result of the signal that collects appointment; Network side judges according to the measurement result of terminal to report whether the signal quality of respective cell reaches (comprise and meeting or exceeding) threshold value, and the radio node of sub-district that signal quality is reached threshold value is as the preliminary election adjacent cell radio node of potential participated in uplink.
Also can discern the adjacent cell radio node of potential participated in uplink through the Reference Signal Received Power that is used to switch (Reference Symbol Received Power abbreviates RSRP as) of measuring this sub-district and adjacent sub-district.
(2) step S404
For the corresponding adjacent cell of preliminary election adjacent cell radio node, (Overload Indication OI) judges whether to exist resources left according to its overload indication information; There is not resources left in indication for OI, that is, the adjacent cell that has transshipped is abandoned its frequency is used.
For each adjacent cell that has resources left; Obtain its resource residual amount respectively; And obtain the application resource borrowing amount of its adjacent cell to it, for example, these data can be obtained by following dual mode: 1) for the adjacent cell that belongs to same distributed base station; Directly use baseband processing unit (BaseBand Unit, internal interface acquisition BBU); 2) for the adjacent cell that belongs to different base station (or different distributions formula base station), obtain through the X2 interface between base station and base station; And use the adjacent cell that surplus yield after the resource still reaches threshold value for removing application, with its radio node as the work radio node.
The resource borrowing of the adjacent minizone that has under its command for same distributed base station; Because baseband processing unit has real time record to the loading condition of each sub-district; Resource borrowing situation to adjacent minizone also has comprehensive grasp, therefore need not just can implement confirming above-mentioned working node through the X2 interface between the base station.
(3) step S406
The resource that can be in this step the terminal be belonged to the sub-district sends to the terminal.According to the resources left of each radio node of participating in uplink (comprising one or more work radio nodes of confirming among this sub-district radio node and the step S404) how much network or BBU; Confirm the resource borrowing amount (the Resource Block quantity of using) of each radio node and use mode (duration that comprises use moment to Resource Block, life cycle, use), and the position and the occupation mode of these resources sent to wireless terminal.
The terminal comprises following several kinds to the occupation mode of the frequency spectrum resource of the fringe region of Serving cell and adjacent sub-district: (1) belongs between the terminal of different districts the one group of frequency spectrum resource that is shared in mutual exclusion on the frequency domain with the mode of time-division; Wherein, the terminal uses the frequency spectrum resource of the fringe region that belongs to Serving cell and the frequency spectrum resource of the fringe region that belongs to adjacent sub-district to send signal simultaneously; (2) belong between the terminal of different districts the one group of frequency spectrum resource that is shared in mutual exclusion on the frequency domain with the mode of frequency hopping; Wherein, adopt mutually orthogonal frequency hopping pattern between the terminal of the fringe region of the terminal of the fringe region of Serving cell and adjacent sub-district; (3) belong to the mode of dividing with sky between the terminal of different districts and be shared in one group of overlapping on frequency domain frequency spectrum resource.
Further, in this step, the working method that network can designated terminal comprises single carrier mode, OFDM mode and code modulation mode etc.
(3) step S408
In this step, network (perhaps BBU) adopts a kind of of following signal that the signal from the different radio node is merged:
Select to merge: from several decentralized signals, choose a best conduct of signal to noise ratio and receive signal;
Equal gain combining: several decentralized signals are carried out direct addition with identical branch gain, and the signal after the addition is as receiving signal;
High specific merges: control respectively merges branch gain, and they are directly proportional with the signal to noise ratio of this branch road respectively, and then addition obtains to receive signal.
Below will further the present invention be described through instantiation.
Instance 1: the uplink business data transmission of using adjacent cell spectrum resource and channel resource between the distributed base station internal node
Fig. 5 is the wireless access network that distributed base station is formed; In this wireless access network; Be furnished with three RRU as radio node 201 (Remote Radio Unit, remote radio unit) on each site, each RRU covers different sub-district (sector) respectively; And each RRU uses different frequency bands or the different orthogonal sub carrier group in the same frequency band: RRU1 service band f1, coverage cell 1; RRU2 service band f2, coverage cell 2; RRU3 service band f3, coverage cell 3.Totally nine RRU on three above-mentioned sites of a BBU control and treatment, between each RRU with the mode networking of 1/3 channeling.In such distributed base station region covered; There are wireless terminal UE1 202a and UE2202b; Wherein, UE1 is covered by three RRU: RRU1 501a, RRU2 501b, RRU3 501c, RRU1 501a are the Control Node of wireless terminal 202a, and RRU1 501a transmits to wireless terminal through the control channel between itself and the wireless terminal and implements the needed control command of uplink.
BBU502 realizes the uplink between network and wireless terminal through above-mentioned ascending transmission method according to the embodiment of the invention:
At first; The measuring amount that BBU502 reports according to wireless terminal 202a to the Reference Signal Received Power (RSRP:Reference symbol received power) of the RRU around it; Determine RRU2501b, RRU3 501c and be the potential node of participating in uplink (that is, above-mentioned preliminary election adjacent cell radio node);
Then, (like this cell load of, OI indication is not 0 to BBU502 according to there not being the such fact in the terminal of using resource in RRU2 501b, the RRU3 501c cell covered.Implementing between the distributed base station internal zone under the situation of uplink; BBU has the loading condition of its each RRU that has under its command; Need not to obtain the loading condition of its each RRU that has under its command through the external interface of BBU), further confirm as the working node that carries out uplink to the terminal to RRU2 501b, RRU3 501c;
Secondly; BBU502 is according to the available resources situation of RRU2 501b, RRU3 501c; And the effect of consideration of power governing factor; Confirm to distribute the continuous Resource Block of frequency domain according to the resource block assignments mode shown in Fig. 3 (a) to wireless terminal between RRU2 501a, RRU2 501b, the RRU3 501c, and the indication wireless terminal sends data to network according to the mode of single carrier on Resource Block;
At last, BBU502 uses receive path and the frequency spectrum of RRU2 501a, RRU2 501b, RRU3 501c, and the mode that merges with high specific receives data from wireless terminal.
Instance 2: the uplink business data transmission of using adjacent cell spectrum resource and channel resource between distributed base station
The wireless access network that Fig. 6 is made up of three distributed base stations (forming like Fig. 1 of each distributed base station); In this wireless access network; There is wireless terminal UE2 202b; UE2 is covered by three RRU: RRU1 601a, RRU2 601b, RRU3 601c, RRU2 501b are the Control Node of wireless terminal 202b, and RRU2 501b transmits to wireless terminal through the control channel between itself and the wireless terminal and implements the needed control command of uplink.
BBU3 602c realizes the uplink between network and wireless terminal through above-mentioned ascending transmission method according to the embodiment of the invention:
At first; The measuring amount that BBU3 602c reports according to wireless terminal 202b to the Reference Signal Received Power (RSRP:Reference symbol received power) of the RRU around it; Confirm that RRU1601a, RRU3 601c are the potential node of participating in uplink (that is, above-mentioned preliminary election adjacent cell radio node);
Then; BBU3 602c according to the load of RRU1 601a, RRU3 601c cell covered indication (as; The OI indication of transmitting from BBU2 through X2 interface), further confirms as RRU1 601a, RRU3 601c the working node of reception uplink business data from the terminal with the situation (BBU2 sends the indication that resource is used by application through X2 interface to BBU3) that the resource of RRU1 601a, RRU3 601c is used by application;
Secondly; BBU3 602c confirms the operable Resource Block situation in terminal such as Fig. 3 (a) according to the resources left situation of RRU1 601a, RRU3 601c; Then, BBU3 602c sends to BBU2 such as RRU1 601a and required Resource Block of bearing of RRU3601c and receiving slot etc. through X2 interface.
At last, under BBU2 control, RRU1 601a and RRU3 601c and RRU2 501b receive the data that wireless terminal transmits respectively on the Resource Block of appointment.RRU1 601a and RRU3 601c send to BBU3 to the data that receive through X2 interface, and the data that RRU1 601a and RRU3 601c and RRU2 501b received by BBU3 are implemented grand branch and gathered also.
As stated; By means of the present invention; Through not only using the frequency spectrum resource of adjacent cell, also use its receive path resource, can further obtain the diversity reception gain of minizone; And through combining the power control measure; Can under the controlled situation of the constant and adjacent area interference of holding frequency spatial reuse form, improve the zone of the frequency spectrum of the operable a plurality of adjacent cells in terminal, thereby can in big zone, improve the uplink speed and the spectrum efficiency at terminal in the cell edge region.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a uplink system that uses or share adjacent cell spectrum resource and channel resource comprises a plurality of adjacent or contiguous radio node and at least one terminal, and the sub-district at place, terminal is a Serving cell, it is characterized in that,
One group of frequency spectrum resource of the fringe region of sub-district is distributed in the one or more terminals and the adjacent sub-district of the said Serving cell of one or more terminals share and the Serving cell of the fringe region of the adjacent sub-district that is positioned at said Serving cell that are positioned at the fringe region of Serving cell with the soft-frequency reuse mode;
Belong between the terminal of different districts with time-division or frequency hopping or empty mode of dividing and share said one group of frequency spectrum resource.
2. uplink according to claim 1 system is characterized in that, said terminal uses the frequency spectrum resource of the fringe region that belongs to said Serving cell and the frequency spectrum resource of the fringe region that belongs to said adjacent sub-district to send signal simultaneously.
3. uplink according to claim 1 system is characterized in that, adopts mutually orthogonal frequency hopping pattern between the terminal of the terminal of the fringe region of said Serving cell and the fringe region of said adjacent sub-district.
4. according to each described uplink system in the claim 1 to 3, it is characterized in that said terminal any in as follows sends signal:
The continuous Resource Block on frequency domain that belongs to two or more radio nodes is used at said terminal, sends signal with single carrier mode or OFDM mode; Wherein, said two or more radio node is selected from the radio node of said Serving cell and the radio node of said adjacent sub-district; Perhaps
The discontinuous Resource Block on frequency domain that belongs to two or more radio nodes is used at said terminal, sends signal with single carrier mode or OFDM mode; Wherein, said two or more radio node is selected from the radio node of said Serving cell and the radio node of said adjacent sub-district.
5. uplink according to claim 4 system is characterized in that, said adjacent or contiguous radio node receives the signal that send at the terminal in the fringe region of fringe region and/or said adjacent sub-district of said Serving cell with the mode of space diversity.
6. according to each described uplink system in the claim 1 to 3, it is characterized in that,
Said radio node comprises: the remote radio unit of base station, distributed base station independently; The antenna of said radio node comprises: be arranged in different sites antenna, be arranged in the antenna of the covering zones of different of same site;
Said terminal comprises transmission channel, receive path, baseband processing unit; Wherein, The bandwidth of said transmission channel covers the part or all of working band of said Serving cell and said adjacent sub-district simultaneously, and said transmission channel can use the frequency spectrum of two or more sub-districts to send signal simultaneously.
7. the ascending transmission method using or share adjacent cell spectrum resource and channel resource is used to comprise a plurality of adjacent or contiguous radio nodes and the system at least one terminal, it is characterized in that, comprising:
The definite set that can participate in the preliminary election adjacent cell radio node of uplink;
From the set of said preliminary election adjacent cell radio node, select to participate in one or more work radio nodes of uplink;
Frequency spectrum resource and occupation mode thereof that the operable said one or more work radio nodes in terminal are belonged to the fringe region of sub-district send to said terminal;
Be positioned at Serving cell fringe region one or more terminals and the fringe region of the adjacent sub-district that is positioned at said Serving cell the said Serving cell of one or more terminals share and the adjacent sub-district of Serving cell distribute to one group of frequency spectrum resource of the fringe region of sub-district with the soft-frequency reuse mode;
Belong between the terminal of different districts with time-division or frequency hopping or empty mode of dividing and share said one group of frequency spectrum resource.
8. ascending transmission method according to claim 7 is characterized in that,
The operation of said definite said preliminary election adjacent cell radio node collection is specially:
The detection collection that is made up of one group of adjacent cell distinguished symbol is sent to said terminal in the base station, and wherein, said detection collection has been specified the signal of specific adjacent cell radio node emission;
Said terminal to report is to the measurement result of the signal of said detection collection appointment;
Network side judges according to the said measurement result of said terminal to report whether the signal quality of respective cell reaches threshold value, and the radio node of sub-district that signal quality is reached threshold value is as the preliminary election adjacent cell radio node that can participate in uplink;
The operation of the said a plurality of work radio nodes of said selection is specially:
For the corresponding adjacent cell of said preliminary election adjacent cell radio node, judge whether to exist resources left according to its overload indication information;
Each adjacent cell for there being resources left obtains resource residual amount respectively, and obtains the application resource borrowing amount of its adjacent cell to it;
For removing the adjacent cell that the surplus yield of using after the resource still reaches threshold value, with its radio node as said work radio node.
9. ascending transmission method according to claim 7 is characterized in that, the occupation mode of said frequency spectrum resource comprise following any:
Said terminal uses the frequency spectrum resource of the fringe region that belongs to said Serving cell and the frequency spectrum resource of the fringe region that belongs to said adjacent sub-district to send signal simultaneously;
Adopt mutually orthogonal frequency hopping pattern between the terminal of the terminal of the fringe region of said Serving cell and the fringe region of said adjacent sub-district.
10. ascending transmission method according to claim 7 is characterized in that, said method further comprises:
Network sends to said terminal with the resource location and the occupation mode thereof of sub-district, place, said terminal;
Said network receives the signal that send at said terminal with the mode of grand branch collection.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2007/003453 WO2009070930A1 (en) | 2007-12-05 | 2007-12-05 | System and method for implementing uplink transmission by borrowing or sharing spectrums and channel resources of neighbor cells |
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| CN101998650B (en) * | 2009-08-31 | 2014-11-05 | 上海交通大学 | Channel allocation method and system in wireless communication system |
| CN102170688B (en) * | 2011-05-26 | 2014-06-25 | 中国科学技术大学 | Load-based power configuration method and device capable of reducing energy consumption of base station |
| CN103906069B (en) * | 2014-02-25 | 2019-07-09 | 北京邮电大学 | Channel method |
| CN109219140B (en) * | 2017-07-06 | 2022-07-05 | 中兴通讯股份有限公司 | Frequency domain bandwidth resource allocation method, terminal and computer readable storage medium |
| CN113346976B (en) * | 2020-03-02 | 2024-04-12 | 华为技术有限公司 | Method, network equipment and system for configuring spectrum resources |
| US11917668B2 (en) * | 2022-01-03 | 2024-02-27 | Qualcomm Incorporated | Signaling for inter-base station interference estimation |
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| EP1653762A2 (en) * | 2004-10-28 | 2006-05-03 | Samsung Electronics Co., Ltd. | Apparatus and method for dynamically allocating resources in an OFDM communication system |
| CN1783861A (en) * | 2004-12-01 | 2006-06-07 | 华为技术有限公司 | Method for realizing frequency soft multiplexing in radio communication system |
| CN101039160A (en) * | 2006-03-17 | 2007-09-19 | 华为技术有限公司 | Multiplexing system, method for sharing control channel resource and reception equipment thereof |
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| CN101009541B (en) * | 2006-01-23 | 2011-04-20 | 华为技术有限公司 | Disturbance coordination method and device of OFDMA system |
| CN101146343B (en) * | 2006-09-13 | 2010-05-19 | 联想(北京)有限公司 | A bandwidth resource allocation method and device in mobile communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1653762A2 (en) * | 2004-10-28 | 2006-05-03 | Samsung Electronics Co., Ltd. | Apparatus and method for dynamically allocating resources in an OFDM communication system |
| CN1783861A (en) * | 2004-12-01 | 2006-06-07 | 华为技术有限公司 | Method for realizing frequency soft multiplexing in radio communication system |
| CN101039160A (en) * | 2006-03-17 | 2007-09-19 | 华为技术有限公司 | Multiplexing system, method for sharing control channel resource and reception equipment thereof |
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| CN101803419A (en) | 2010-08-11 |
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