CN102316593A - Downlink resource allocation method and base station - Google Patents
Downlink resource allocation method and base station Download PDFInfo
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- CN102316593A CN102316593A CN201010231521XA CN201010231521A CN102316593A CN 102316593 A CN102316593 A CN 102316593A CN 201010231521X A CN201010231521X A CN 201010231521XA CN 201010231521 A CN201010231521 A CN 201010231521A CN 102316593 A CN102316593 A CN 102316593A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
Abstract
The invention discloses a downlink resource allocation method and a base station, wherein the downlink resource allocation method comprises the steps: the base station judges a frequency interference level of a terminal according to parameter information reported by the terminal, wherein the parameter information comprises CINR (carrier interference-to-noise ratio), RSSI (Received Signal Strength Indicator) and strength of a signal received by the terminal from a neighbor cell; and the base station allocates downlink resource to the terminal according to a preset policy in accordance with the frequency interference level of the terminal, wherein the preset policy comprises that the downlink resources allocated to the terminal with the maximum frequency interference level under different sectors of the base station are multiplexed. According to the invention, the interference of the terminal in a cell boundary by the neighbor cell can be avoided, and user experience can be enhanced.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of descending resource allocation method and base station.
Background technology
OFDM (Orthogonal Frequency Division Multiplexing; Abbreviating OFDM as) technology is a kind of multi-carrier transmission technology; It is the high speed transmission technology under a kind of wireless environment by multi-carrier modulation (Multi-Carrier Modulation abbreviates MCM as) development.The frequency response curve of wireless channel is non-flat forms mostly, and the OFDM technology is in frequency domain, given channel to be divided into many orthogonal sub-channels, on each subchannel, each subcarrier is modulated, and each subcarrier carries out parallel transmission.
Micro-wave access to global intercommunication (World Interoperability for MicrowaveAccess; Abbreviate WiMAX as) the employing OFDM of system technology; Frame structure such as Fig. 1 of its time division multiplexing (TimeDivision Duplex abbreviates TDD as) pattern are said, and this frame structure is a two-dimensional structure; Transverse axis is made up of the symbol (Symbol) of time domain; The longitudinal axis is that the subcarrier of frequency domain is formed, and transmission/reception transmission intercal (Transmit/Receive TransitionGap abbreviates TTG as) is descending sub frame and the adjacent interpulse interval of uplink burst.As shown in Figure 1, descending sub frame is beginning with leading (Preamble), leadingly is mainly used in physical layer synchronization and equilibrium.After leading is frame control head (Frame Control Header abbreviates FCH as).In addition, if also have a descending mapping (DL-MAP) message in the present frame, the burst (Burst) of then carrying DL-MAP message is FCH and then.And, if this downlink frame also need be transmitted up mapping (UL-MAP) message, then also and then DL-MAP message appearance of UL-MAP message.Subsequent frame partly is used for transmitting data, and this part is made up of a plurality of bursts.
Because frequency resource is a kind of non-renewable rare and expensive resource, therefore, need effectively utilize frequency resource.The channeling technology is a kind of networking technology that proposes in order to improve the availability of frequency spectrum and expanding system capacity.Traditional channeling technology can be divided into alien frequencies multiplex technique and same multiplex technique frequently.Can accomplish that with the frequency multiplex technique frequency duplex factor as one is 1, i.e. the identical frequency band of the use of sub-district in the whole system coverage is the user's service in this sub-district.The alien frequencies multiplex technique is formed a multiplexing cluster with the sub-district of several use different frequency bands in the system, and the frequency band that takies in this multiplexing cluster is all frequency bands that system allows use, and whole system then is made up of a plurality of multiplexing cluster.
Because the multiplexing factor is merely 1, therefore have the very high availability of frequency spectrum and power system capacity with the frequency multiplex technique.Yet because identical frequency band is used in all sub-districts, the same frequency that edge customer can receive from other neighbor cells disturbs, and communication quality is had a strong impact on, thereby in the cellular system of reality, seldom uses.The alien frequencies multiplex technique since the co-frequency cell physical location be separated by far away, can good restraining with disturbing frequently.Yet along with increasing day by day of wireless user, the power system capacity of alien frequencies multiplex system receives very big test.
For fear of disturbing with frequency between the base station, it is the mode of 1 * 3Segment (section) * 3 that WiMAX operator possibly adopt networking mode C * N * S, the base station number during wherein C is every bunch; N is total channel (or channel group) number of channeling; S is every sector of base station number, under this networking mode, can obtain better inhibited with disturbing frequently between the base station; But it is very low that the availability of frequency spectrum becomes, and throughput is difficult to guarantee.
When WiMAX operator frequency resource is not enriched; In wireless communication network planning, will adopt identical networking mode C * N * S is 1 * 1 * 3 mode; Base station number during wherein C is every bunch, N are total channel (or channel group) numbers of channeling, and S is every sector of base station number.At present, in this networking mode, because base station transmitting downstream signal on its each sector uses carrier frequency all identical, therefore, the interference that the user at the cell boarder place receives the adjacent area is bigger, thereby has reduced the user experience of boundary.C * N * S is the mode of 1 * 3Segment (section) * 3 though adopt networking mode, can obtain better inhibited with disturbing frequently between the base station, and it is very low that the availability of frequency spectrum becomes, and throughput is difficult to guarantee.More than some traditional frequency reuse approach, the terminal can not obtain required bandwidth resources to greatest extent.
Summary of the invention
Main purpose of the present invention is to provide a kind of descending resource allocation method and base station, is 1 * 1 * 3 o'clock to solve in the identical networking mode at least, and the user at cell boarder place receives the bigger problem of interference of adjacent area.
According to an aspect of the present invention; A kind of descending resource allocation method is provided; Comprise: the base station is according to the frequency interferences grade at this terminal of parameter information judgement of terminal to report, and wherein, parameter information comprises: CINR, RSSI and this terminal receive the signal strength signal intensity of adjacent area; The base station is this terminal distribution downlink resource according to the frequency interferences grade at terminal according to preset strategy, and wherein, this preset strategy comprises: for the downlink resource of the terminal distribution of the peak frequency level of interference under the different sectors of base station does not carry out multiplexing.
According to a further aspect in the invention; A kind of base station is provided, has comprised: judging module is used for the frequency interferences grade according to this terminal of parameter information judgement of terminal to report; Wherein, parameter information comprises: CINR, RSSI and this terminal receive the signal strength signal intensity of adjacent area; Distribution module is used for being this terminal distribution downlink resource according to the frequency interferences grade at this terminal according to preset strategy, and wherein, preset strategy comprises: for the downlink resource of the terminal distribution of the peak frequency level of interference under the different sectors of this base station does not carry out multiplexing.
Through the present invention; The base station is when being the terminal distribution downlink resource; Frequency interferences grade through judging this terminal is this terminal distribution downlink resource; Wherein, the base station is not carried out multiplexing for the downlink resource of terminal (promptly being in the terminal of the cell boarder) distribution of the peak frequency level of interference under its different sectors.In the present invention, owing to, disturb, improved user experience thereby avoided being in the adjacent area that the terminal of cell boarder receives for the downlink resource at terminal that is in the different districts border does not carry out multiplexingly.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the downstream physical frame under the tdd mode in the existing WiMAX system;
Fig. 2 is the structural representation according to the base station of the embodiment of the invention one;
Fig. 3 is the structural representation according to the preferred base station of the embodiment of the invention one;
Fig. 4 is the flow chart according to the descending resource allocation method of the embodiment of the invention two;
Fig. 5 is the scene sketch map of 3 sector networkings and N=3 in the embodiment of the invention three;
Fig. 6 is the structural representation of the downlink frame of 3 sector networkings and N=3 in the embodiment of the invention three;
Fig. 7 is the scene sketch map of 3 sector networkings and N=2 in the embodiment of the invention three;
Fig. 8 is the structural representation of the downlink frame of 3 sector networkings and N=2 in the embodiment of the invention three;
Fig. 9 is the networking mode sketch map in the embodiment of the invention five;
Figure 10 is the structural representation of downlink frame in the embodiment of the invention five;
Figure 11 is that the base station is the flow chart that handle at the terminal of different frequency level of interference in the embodiment of the invention five;
Figure 12 is to the terminal of the different frequency level of interference flow chart by the bandwidth resource allocation of frame scheduling in the embodiment of the invention five.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Embodiment one
Fig. 2 is the structural representation according to the base station of the embodiment of the invention one; This base station comprises: judging module 10; Be used for judging the frequency interferences grade at this terminal according to the parameter information of terminal to report; Wherein, Above-mentioned parameter information comprises: carrier-in-interference noise ratio (Carrier toInterference plus Noise Ratio abbreviates CINR as), reception signal strength signal intensity indication (Received Signal Strength Indicator abbreviates RSSI as) and said terminal receive the signal strength signal intensity of adjacent area; Distribution module 20; The frequency interferences grade that is used for according to this terminal is said terminal distribution downlink resource according to preset strategy; Wherein, this preset strategy comprises: for the downlink resource of the terminal distribution of the peak frequency level of interference under the different sectors of base station does not carry out multiplexing.
In the above-mentioned base station that the embodiment of the invention one provides; The interference of the adjacent area that receives for fear of the terminal that is in cell boarder; Distribution module 20 for different sectors down to receive the adjacent area to disturb the downlink resource of maximum terminal (being the terminal of cell edge) distribution not carry out multiplexing, thereby can avoid being in the interference between the terminal of terminal and other sub-districts of cell boarder.
Fig. 3 is the structural representation of a kind of preferred base station of the embodiment of the invention one; The difference of this preferred base station and base station shown in Figure 2 is that this preferred base station can also comprise configuration module 30, is used for according to the signal strength signal intensity of CINR, RSSI and adjacent area N frequency interferences grade being set; And the downlink resource of each sector of base station is divided into N resource area from frequency domain and time domain; Dispose the corresponding resource area of each frequency interferences grade, and the frequency of the resource area of the peak frequency level of interference of each sector correspondence is different, wherein; The frequency interferences grade is big more; The corresponding terminal of this frequency interferences grade receives the interference of adjacent area big more, and wherein, N is smaller or equal to the total number of users under arbitrary sector more than or equal to 2.Judging module 10 receives the signal strength signal intensity of adjacent area according to CINR, RSSI and this terminal of terminal to report; N the frequency interferences grade that query configuration module 30 is provided with; Can confirm the frequency interferences grade at this terminal; And distribution module 20 is according to the frequency interferences grade at this terminal, and the resource area corresponding with this frequency interferences grade of query configuration module 30 configurations is this terminal distribution corresponding downstream resource.Particularly; Distribution module 20 can the frequency interferences grade at this terminal is corresponding resource area as the downlink resource at this terminal; Perhaps; If it is idle that the frequency interferences grade corresponding resource area higher than this frequency interferences grade exists, this terminal is given in the resource allocation that then distribution module 20 also can be idle with this part.According to this preferred base station, can improve the efficient that downlink resource distributes.
Need to prove; Though above-mentioned preferred base station is that example describes with the corresponding relation of configuration module 30 preset configuration frequency interferences grades, resource area and frequency interferences grade and resource area; But be not limited to this; In the practical application, also can, judging module 10 carry out the distribution of downlink resource after confirming the frequency interferences grade at terminal according to the preset strategy that is provided with.
Preferably, configuration module 30 also is used to the corresponding transmitting power of each frequency interferences grade configuration, and wherein, the frequency interferences grade is more little, and the transmitting power of this frequency interferences grade correspondence is more little.Promptly in embodiments of the present invention, reduce transmitting power, thereby can dwindle coverage, the further interference of minizone the low portable terminal of frequency interferences grade.
Preferably; In embodiments of the present invention; The base station can partial frequency multiplexing (FFR; Fractional Frequency Reuse) technology is distributed the downlink resource at the corresponding terminal of each frequency interferences grade, promptly for the junior terminal of frequency interferences (terminal of this grade generally is positioned at center of housing estate, channel condition better, the terminal little to the interference of other sub-districts) to be distributed in frequency duplex factor as one be on 1 the reuse set; (terminal of this grade generally is positioned at cell edge for the higher terminal of frequency interferences grade; Because it is distant from base station distance; Channel condition is poor, and the terminal of other sub-districts between interference ratio bigger); Therefore, the terminal distribution with this part grade is on the reuse set of n (n >=2) at frequency duplex factor as one.So promptly can reduce interference, also can improve the utilance of downstream spectrum.
Embodiment two
Fig. 4 is the flow chart according to the descending resource allocation method of the embodiment of the invention two, and this method mainly may further comprise the steps:
Step S402, the base station is according to the frequency interferences grade at this terminal of parameter information judgement of terminal to report, and wherein, this parameter information comprises: CINR, RSSI and terminal receive the signal strength signal intensity of adjacent area;
For example, the terminal reports above-mentioned parameter information to the base station when networking, and the base station is judged according to this parameter information, perhaps, triggers or Event triggered (for example, the signal at terminal changes) base station repetition S402 in the cycle, up to terminal exiting network.
Particularly, the base station can be confirmed that this terminal receives the disturbed condition that signal of base station is strong and weak and receive the adjacent area, thereby confirm the frequency interferences grade at this terminal according to the signal strength signal intensity of CINR, RSSI and the reception adjacent area, this terminal at this terminal of terminal to report.
For example, the frequency interferences grade can comprise N grade: UserType
1, UserType
2, UserType
3..., UserType
N, the value of N is for more than or equal to 2 and be less than the total number of users that equals under arbitrary sector.UserType
1The terminal receive the interference of adjacent area minimum, UserType
2Take second place ..., and UserType
NThe terminal receive the interference maximum (being the outer shroud user) at adjacent station, promptly the frequency interferences grade is big more, the corresponding terminal of this frequency interferences grade is increased by the disturbed condition of adjacent area gradually.
Step S404, the base station is this terminal distribution downlink resource according to the frequency interferences grade at this terminal according to preset strategy, wherein, preset strategy comprises: for the frequency of the downlink resource of the terminal distribution of the peak frequency level of interference under the different sectors of base station inequality.
For example, the base station can be formulated for N part from frequency domain and time domain with bandwidth, represents different resources zone: BW
1... BW
n... BW
N, BW wherein
nBe meant UserType
nThe bandwidth used of terminal, the corresponding corresponding bandwidth of different frequency interferences grades, the base station is when be the terminal distribution downlink resource, allocated bandwidth that will be corresponding with the frequency interferences grade at terminal is to this terminal.In general disturbed few more user's available resources many more, disturbed more user's available resources few more, for the usable bandwidth resources size at the terminal of n frequency interferences grade can for
UserType
1The terminal can use all bandwidth promptly
And UserType
NThe user can only use size to be BW
NBandwidth.
In order to guarantee to cover, because UserType
NDisturbed by the adjacent area maximum at terminal (also can be called the outer shroud user), UserType between the adjacent area
NThe bandwidth used of terminal inequality, that is to say that under 1 * 1 * S the outer shroud user of S sector can not use identical bandwidth.
For example; Situation for N=3; The frequency interferences grade at terminal can comprise: senior frequency interferences (also can be called the outer shroud user), intermediate frequency interferences (ring user in also can being called) and rudimentary frequency interferences (ring user in also can being called); The base station can be with the symbol of downlink frame according to the time domain separated into two parts: a preceding part is the inner and outer ring resource of dividing on the frequency domain, and a back part is the total symbolic number of middle ring resource.Then the subchannel of inner and outer ring intersection is divided according to the ratio of the frequency resource of inner and outer ring; Be divided into 2 subchannel collection: ring channel set, outer shroud set of sub-channels in being respectively; Wherein, Preferably, the outer shroud set of sub-channels is used 1/3 subchannel, and interior ring channel set uses 2/3 remaining subchannel.Middle ring user uses whole subchannels.The principle of resource allocation: the outer shroud user can only use the outer shroud resource; Encircle resource during middle ring user at first uses, can continue to use the outer shroud resource; Ring resource in interior ring user at first uses is encircled resource in can continuing to use.So just effectively raise the degree of reusing of outer shroud sub channel resource, reduced the waste of band resource.
For the situation of N=2, promptly be interior ring user when interior ring user all being adjudicated for middle ring user or with the whole judgements of middle ring user.When having only outer shroud and middle ring user, be about to outer in the ring resource carry out the division on the time domain, can the same frequency that the outer shroud bandwidth resources are suffered be disturbed this moment drop to minimum.When middle ring user judgement during for interior ring user, when promptly having only outer shroud and interior ring user, is promptly only carried out the division of frequency domain with the inner and outer ring user, can obtain higher spectrum efficiency this moment but more serious with interference frequently.
When middle ring user exists, can be with the same value of the fixing employing of the middle ring number of symbols of all sectors.Interference in further reducing between ring resource and the inner and outer ring resource.
The base station during allocation of downlink resource, is divided into N Region according to frequency division and time-division with descending resource with downlink frame earlier in a downlink frame; The base station is UserType then
NTerminal distribution Region
NBandwidth, intact or the terminal of this grade does not have demand up to allocated bandwidth; Be UserType then
N-1The user distribute Region
N-1Bandwidth and Region
NUntapped bandwidth is up to allocated bandwidth is intact or the terminal does not have demand; Continue as UserType again
N-2The user distribute Region
N-2Bandwidth and Region
N-1And Region
NUntapped bandwidth is up to allocated bandwidth is intact or the terminal does not have demand; In like manner analogize and be UserType
N-3... UserType
2The terminal distribution bandwidth, intact or the terminal does not have demand up to allocated bandwidth; Be UserType at last
1The terminal distribution resource, can know UserType according to top flow process
1The user can use the unallocated resource of whole frame, up to allocated bandwidth is intact or the terminal does not have demand, resource allocation finishes.
Preferably, the base station also will be the corresponding transmitting power of each frequency interferences grade configuration when disposing the resource area corresponding with the frequency interferences grade, and wherein, the frequency interferences grade is more little, and the transmitting power of this frequency interferences grade correspondence is more little; For example, for the situation of above-mentioned N=3, the relation of the transmitting power of outer shroud, middle ring, interior ring resource size is P
Outward＞P
In＞P
InThen the base station adopts the transmitting power corresponding with the frequency interferences grade at this terminal to send signal when signal is sent at the terminal, promptly reduces the internally transmitting power at ring terminal, reduces covering, thereby further avoids interference.
The said method that provides according to the embodiment of the invention two; Can decide the multiplexed situation of frequency according to the actual interference situation at terminal; Can reach the multiplexing factor in interference is 1 more after a little while; When disturbing greatly, thereby reduce the transmission quality that multiplexing number of resources can guarantee the terminal, can also improve the availability of frequency spectrum and throughput of system.
Embodiment three
The embodiment of the invention three is that to be example to the downlink resource of the embodiment of the invention distribute the N=3 grade describes with 3 sectors (S=3) networking mode commonly used and frequency interferences grade.
Fig. 5 is the scene sketch map of 3 sector networkings and N=3, and according to the frequency interferences grade, in the embodiment of the invention three, the terminal under sector is divided into: interior ring user, middle ring user and outer shroud user.Interior ring user generally is in the main lobe position of antenna, and leaving from station closer, path loss is less, receives the interference of adjacent area also smaller simultaneously, and therefore, this type of user promptly uses very little power to send downstream signal, also has preferable quality to end side; In the ring user comparatively speaking than interior ring user is leaving from station will be a little further, path loss is with disturb will be more comparatively speaking, therefore, in order to guarantee certain signal quality, the base station is bigger than interior ring user to the middle transmitting power of encircling the user; And the outer shroud user is divided into two kinds: a kind of is leaving from station very near but be in the position of antenna sidelobe; Although signal strength signal intensity is big, owing to the range difference of the antenna that leaves two Segment is few, the interference strength that receives is also very big; A kind of in addition is to be in cell edge; Farthest leaving from station, path loss is maximum, receives the interference of adjacent area also the most serious.
Characteristics and terminal distribution situation and networking situation according to above-mentioned 3 frequency interferences grade terminals; The downlink frame of 3 Segment under the base station is divided into endocyclic area (InnerRegion), the individual part of outer region (Outer Region) and territory, Central District (Median Region 3), as shown in Figure 6.
Wherein, ring resource in interior ring user mainly uses has in middle ring and outer shroud resource and to encircle and the outer shroud resource in also can using under the idle situation.Interior ring user uses low power transmissions, to reduce the interference to the adjacent area outer shroud.
Encircle resource during middle ring user mainly uses, have under the idle situation in the outer shroud resource and also can use the outer shroud resource.Middle ring user uses the lower-wattage emission, reduces and disturbs the while also will guarantee certain signal quality.
The outer shroud user receives the interference of adjacent area bigger, and the interference to the adjacent area simultaneously is also bigger, therefore can only use the outer shroud resource, uses higher power emission to guarantee covering.
Can know that by Fig. 6 the middle ring of 3 Segment under the same base station staggers with outer shroud, interior ring on time domain, use identical frequency resource; The outer shroud of 3 Segment is a frequency division, does not disturb between the outer shroud; And interior ring just is to use all frequency resources outside middle ring and the outer shroud frequency resource, between the interior ring and interior ring of 3 Segment, between interior ring and the outer shroud frequency overlap is arranged.
Between 3 sectors, exist between middle ring and the middle ring and disturb, therefore, middle ring user's needs are controlled the carrier transmit power in territory, descending Central District, and the interference that reduces the adjacent area guarantees certain signal quality simultaneously.Also exist between the interior ring of 3 Segment and the interior ring and disturb, but the carrier wave of interior ring will keep lower transmitting power, and can know that from Fig. 5 distance is far away between the interior ring, therefore, interior ring and the interference between the interior ring between the sector are very little, can ignore.Meanwhile, exist between the inner and outer ring of 3 Segment and disturb, but owing to the general power of outer shroud in the embodiment of the invention is all higher, and inner loop power is low, and coverage is little, and therefore, the interior ring user of current sector can not interfere with the outer shroud of another sector.In addition, owing to be that the fabulous user of channel condition just can advance interior ring generally,, encircle the user in also can not having if there is not the user to arrive the condition of interior ring.And between the middle ring of 3 Segment and the outer shroud owing to be the time-division, do not have interference.
Embodiment four
The embodiment of the invention four is that to be example to the downlink resource of the embodiment of the invention distribute the N=2 grade describes with 3 sectors (S=3) networking mode commonly used and frequency interferences grade.
Work as S=3, during N=2, just the user only is divided into outer shroud and interior ring user, and as shown in Figure 7, the scene when this scene and N=3 is similar, and frame structure also has some variations, and bandwidth resources only are divided into 2 parts, and frame structure is as shown in Figure 8.
The base station is judged according to the downstream signal situation.After the terminal networks; The signal power that receives adjacent station at descending CINR, RSSI information and the terminal of this base station according to the terminal judges that the terminal is which the frequency interferences grade that is in basic, normal, high, carries out transmitting power control and allocation of downlink bandwidth resources according to the frequency interferences grade at this terminal according to above-mentioned strategy again.
Embodiment five
The present invention implements five with S=3, N=3 under the Wimax, and promptly the networking mode of 3 sector networkings, 3 quefrency level of interference is that example describes.Fig. 9 is the networking mode sketch map in the present embodiment, owing to divide the user of 3 quefrency level of interference, therefore, downlink resource also is divided into 3 types, and the downlink frame structure is shown in figure 10.
Figure 11 mainly may further comprise the steps for base station in the present embodiment is the flow chart that handle at the terminal of different frequency level of interference:
Step 1101, the terminal networks;
Step 1102, the base station is interior ring, middle ring or outer shroud user according to the RST judgement user at the received adjacent station of downstream signal situation and terminal at terminal;
Step 1103: the base station is implemented different power control strategies and is implemented different downlink bandwidth distribution mechanisms the terminal according to the user type at terminal;
Step 1104: whether the signal at terminal changes or the cycle of judgement again at terminal arrives, and is then to go to step 1102, otherwise goes to step 1105;
Step 1105: whether the terminal moves back net, is that then flow process finishes, otherwise goes to step 1104;
Figure 12 is S=3 under the Wimax, among the N=3 terminal of different frequency level of interference is pressed the flow chart of the bandwidth resource allocation of frame scheduling, mainly may further comprise the steps:
Step 1201, the bandwidth resources of distributing outer shroud for the outer shroud user;
Whether step 1202 has not had outer shroud user's demand or the outer shroud resource distributes, and is then to go to step 1203, otherwise goes to step 1201;
Step 1203 is the bandwidth resources of ring in the middle ring user distribution and the bandwidth resources that outer shroud does not also have distribution;
Step 1204, whether in not had ring user's demand or middle ring resource and outer shroud resource do not distribute, and are then to go to step 1205, otherwise go to step 1203;
Step 1205 is for interior ring user distributes the bandwidth resources of interior ring and the bandwidth resources that outer, middle ring does not also have distribution;
Step 1206 so whether in having had ring user's demand or available resources do not distribute, is that then flow process finishes, otherwise goes to step 1205.
From above description, can find out, in embodiments of the present invention; Identical networking mode C * N * S is under the mode of 1 * 1 * S (S is every sector of base station number), through the frame structure of planning downlink frame and the frequency band of S Segment use under the same station, and through controlling the transmitting power of base station; Can adjust multiplexing frequency according to disturbed condition, frequency duplex factor as one can reach 1 when best; Improving the availability of frequency spectrum and expanding system capacity simultaneously; Also reduce interference, improved cell-edge performance, promoted the total throughout of whole sub-district; Help operator to solve under the frequency resource condition of limited, the covering of cellular network and throughput performance can effectively improve.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
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 (12)
1. a descending resource allocation method is characterized in that, comprising:
The frequency interferences grade at said terminal is judged according to the parameter information of terminal to report in the base station, and wherein, said parameter information comprises: carrier-in-interference noise ratio CINR, receive the signal strength signal intensity that signal strength signal intensity indication RSSI and said terminal receive the adjacent area;
Said base station is said terminal distribution downlink resource according to the frequency interferences grade at said terminal according to preset strategy; Wherein, said preset strategy comprises: for the downlink resource of the terminal distribution of the peak frequency level of interference under the different sectors of said base station does not carry out multiplexing.
2. method according to claim 1 is characterized in that, before the frequency interferences grade at the said terminal of said base station judges, said method also comprises:
Said base station is provided with N frequency interferences grade according to the signal strength signal intensity of CINR, RSSI and adjacent area; Wherein, the frequency interferences grade is big more, and the corresponding terminal of this frequency interferences grade receives the interference of adjacent area big more; Wherein, N is smaller or equal to the total number of users under arbitrary said sector more than or equal to 2;
Said base station is divided into N resource area with the downlink resource of each sector under it from frequency domain and time domain; Dispose the corresponding resource area of each frequency interferences grade; And the frequency of the resource area that the peak frequency level of interference of each sector is corresponding is different.
3. method according to claim 2; It is characterized in that said base station is that said terminal distribution downlink resource comprises according to the frequency interferences grade at said terminal according to preset strategy: said base station is the said terminal distribution resource area corresponding with the frequency interferences grade at said terminal.
4. method according to claim 3; It is characterized in that; If it is idle that the frequency interferences grade corresponding resource area higher than the frequency interferences grade at said terminal exists, the downlink resource that then said base station is said terminal distribution also comprises the said high corresponding resource area of frequency interferences grade.
5. according to each described method in the claim 2 to 4, it is characterized in that, said N=3, said N frequency interferences grade is: senior frequency interferences, intermediate frequency interferences and rudimentary frequency interferences; Said base station with its down the downlink resource of each sector be divided into N resource area from frequency domain and time domain and comprise:
Said base station with the symbol of the descending sub frame of each sector according to the time domain separated into two parts; Wherein, A back part all symbols on whole frequency resource are second resource area, and said second resource area is corresponding with intermediate frequency interferences, and all symbols on the whole frequency resource of a preceding part are divided into first resource area and information resources zone on frequency domain; Said first resource area is corresponding with rudimentary frequency interferences, and the information resources zone is corresponding with senior frequency interferences grade.
6. method according to claim 5 is characterized in that, said first resource area accounts for 2/3 of frequency resource on frequency domain, and said information resources zone accounts for 1/3 of frequency resource on frequency domain.
7. according to each described method in the claim 2 to 4, it is characterized in that, said N=2, said N frequency interferences grade is: senior frequency interferences and intermediate frequency interferences; Said base station with its down the downlink resource of each sector be divided into N resource area from frequency domain and time domain and comprise:
Said base station with the symbol of the descending sub frame of each sector according to the time domain separated into two parts; Wherein, A back part all symbols on whole frequency resource are second resource area; Said second resource is corresponding with senior frequency interferences, and a preceding part all symbols on whole frequency resource are first resource area, and said first area is corresponding with said intermediate frequency interferences.
8. according to each described method in the claim 2 to 4, it is characterized in that, said N=2, said N frequency interferences grade is: senior frequency interferences and rudimentary frequency interferences; Said base station with its down the downlink resource of each sector be divided into N resource area from frequency domain and time domain and comprise:
Said base station is divided into two zones with the symbol of the descending sub frame of each sector according to frequency domain, and is corresponding with senior frequency interferences and rudimentary frequency interferences respectively.
9. according to each described method in the claim 2 to 4, it is characterized in that said base station is when disposing the resource area corresponding with the frequency interferences grade, said method also comprises:
Said base station is the corresponding transmitting power of each frequency interferences grade configuration, and wherein, the frequency interferences grade is more little, and the transmitting power of this frequency interferences grade correspondence is more little;
When said base station was said terminal distribution downlink resource according to the frequency interferences grade at said terminal according to preset strategy, said method also comprised:
Said base station obtains the transmitting power corresponding with the frequency interferences grade at said terminal, with this transmitting power as sending the power that signal uses to said terminal.
10. a base station is characterized in that, comprising:
Judging module is used for judging according to the parameter information of terminal to report the frequency interferences grade at said terminal, and wherein, said parameter information comprises: carrier-in-interference noise ratio CINR, receive the signal strength signal intensity that signal strength signal intensity indication RSSI and said terminal receive the adjacent area;
Distribution module; The frequency interferences grade that is used for according to said terminal is said terminal distribution downlink resource according to preset strategy; Wherein, said preset strategy comprises: for the downlink resource of the terminal distribution of the peak frequency level of interference under the different sectors of said base station does not carry out multiplexing.
11. base station according to claim 10 is characterized in that, said base station also comprises: configuration module; Be used for N frequency interferences grade being set, and the downlink resource of each sector of said base station is divided into N resource area from frequency domain and time domain, dispose the corresponding resource area of each frequency interferences grade according to the signal strength signal intensity of CINR, RSSI and adjacent area; And the frequency of the resource area that the peak frequency level of interference of each sector is corresponding is different; Wherein, the frequency interferences grade is big more, and the corresponding terminal of this frequency interferences grade receives the interference of adjacent area big more; Wherein, N is smaller or equal to the total number of users under arbitrary said sector more than or equal to 2.
12. base station according to claim 11 is characterized in that, said configuration module also is used to the corresponding transmitting power of each frequency interferences grade configuration, and wherein, the frequency interferences grade is more little, and the transmitting power of this frequency interferences grade correspondence is more little.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010231521XA CN102316593A (en) | 2010-07-09 | 2010-07-09 | Downlink resource allocation method and base station |
| PCT/CN2010/079520 WO2012003695A1 (en) | 2010-07-09 | 2010-12-07 | Method for allocating downlink resources and base station |
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| CN201010231521XA CN102316593A (en) | 2010-07-09 | 2010-07-09 | Downlink resource allocation method and base station |
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| CN114900844A (en) * | 2022-05-17 | 2022-08-12 | 中国联合网络通信集团有限公司 | Frequency reduction network quitting method and device based on mobile wireless network |
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| CN109511125B (en) * | 2018-11-15 | 2021-12-03 | 中国科学院上海微系统与信息技术研究所 | Method for identifying adjacent cell interference and different system interference in wireless network |
| CN111405570B (en) * | 2018-12-14 | 2023-09-08 | 中国移动通信集团河南有限公司 | Network resource allocation method and device |
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| WO2012003695A1 (en) | 2012-01-12 |
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