The website dispatching method of wireless S2S communication system
Technical field
The invention belongs to wireless communication technology field, in particular to the website scheduling mechanism scheme of wireless S2S communication system.
Background technique
With the popularization of intelligent terminals with the explosive growth of network capacity, the evolution towards the 5th third-generation mobile communication (5G)
Demand seems more urgent.Communication pattern abundant and the thus promotion of bring terminal experience will be one considerable
Evolution tendency.As a candidate technologies towards 5G, site-to-site (Station-to-Station, S2S) communication has
It is potential to improve network performance, promote the advantage of website experience, therefore receive significant attention.
S2S communication is terminal direct connection technology, allows adjoining website directly to carry out data communication, needs not move through center
Control the forwarding of access point.It can resource in multiplexed network, increase the spectrum efficiency of entire communication system, can be in certain journey
Wireless communication system frequency spectrum resource shortage is solved the problems, such as on degree.Simultaneously as S2S communication distance is relatively short, channel quality
Preferably, higher transmission rate, shorter time delay and lower power consumption be can be realized.
However, if the resource of cell where S2S communication multiplexing other websites may interfere cell, cell other
Site communication may also can communicate S2S and interfere, in addition, multiple S2S communication may also be interfered with each other between.Currently,
Realize that the key technology of S2S efficient communication is power control and interference coordination.Existing research primarily focuses on logical in given S2S
Believe clock synchronization, guarantees network communication quality by reducing effective distribution of power and running time-frequency resource, and for how in cell
In effectively dispatch S2S communication to then rare research.
Summary of the invention
Goal of the invention: in order to make up for the deficiencies of the prior art, the present invention proposes the website dispatching party of wireless S2S communication system
Method is dispatched multiple websites by base station centralized distribution to S2S communication is executed simultaneously, can reduced again while promoting network throughput dry
It disturbs.
Technical solution: the purpose in order to realize foregoing invention, the present invention propose the website dispatcher of wireless S2S communication system
Scheme processed, specifically comprises the following steps:
The website dispatching method of wireless S2S communication system, which is characterized in that specifically comprise the following steps:
Step 1: website knows sector ID and received signal quality locating for it by sector-level scanning, and feeds back its institute
In sector number ID and received signal quality Ii,ID, and adjacent sector numberWith corresponding received signal qualityWherein website institute
Place's sector ID is the corresponding scanning sector number of scan phase optimum receiving signal quality.In feedback procedure, if website is sector side
Edge website then directly feeds back its adjacent sector numberWith corresponding received signal qualityIf not sector-edge website, then will
Its adjacent sector numberWith corresponding received signal qualityIt empties.
Determine that website is sector-edge website method particularly includes: if the adjacent sector downlink signal quality that receives of website with
Its locating sector downlink signal quality is close, then determines that the website for sector-edge website, that is, meets
Wherein, ε (ε >=0) is edge site decision threshold, and i is site index number, and ID is the sector number where website i,For the adjacent sector number of website i, Ii,IDFor the received signal quality of base station website i when sector ID emits signal,For base
It stands in sectorThe received signal quality of website i when emitting signal.
Step 2: according to website feedback information, determine whether the website can establish S2S mechanism, method particularly includes:
(1) website i and website j are in same sector ID, can be divided into three kinds of situations:
Situation 1:, can be with when meeting condition 1 and 2 simultaneously if website i and website j are not the edge site of sector ID
Establish S2S direct communication;
The down receiving signal quality of 1: two website of condition should approach, that is, meet
|Ii,ID-Ij,ID|≤α (2)
Wherein, Ii,IDFor the received signal quality of base station website i when sector ID emits signal, Ij,IDIt is base station in sector
The received signal quality of website j when ID emits signal, α are two website S2S communication thresholds;
Condition 2:S2S should avoid the interference to other active stations in sector as far as possible when communicating, i.e. do not deposit around two websites
In neighbouring active stations, meet
|Ii,ID-Ik,ID| >=β and | Ij,ID-Ik,ID|≥β,k∈ΩIDAnd k ≠ i, j (3)
Wherein, Ii,IDFor the received signal quality of base station website i when sector ID emits signal, Ij,IDIt is base station in sector
The received signal quality of website j, site k (k ∈ Ω when ID emits signalID) be sector ID in active stations, Ik,IDFor base station
The received signal quality of site k when sector ID emits signal, β indicate the interference threshold to other active stations.
Situation 2: a website i is the edge site of sector ID if it exists, and the adjacent sector number of website i isIt is then full simultaneously
When sufficient condition 1,2 and 3, S2S direct communication can establish;
Condition 3: the interference to its adjacent sector-edge active stations should be avoided in sector-edge website, that is, meets
|Ii,ID-Im,ID|≥β (4)
Wherein, Ii,IDFor the received signal quality of base station website i when sector ID emits signal, websiteFor
SectorIn edge active stations, Im,IDIndicate the received signal quality of website m when base station emits signal by sector ID, β
Indicate the interference threshold to other active stations.
Situation 3: if website i and website j are the edge site of sector ID, the adjacent sector number of website i isWebsite j's
Adjacent sector number isWhen then meeting condition 1,2,3 and 4 simultaneously, S2S direct communication can establish;
The adjacent sector number of 4: two sector-edge website of condition is identical, that is, meets
(2) website i and website j are in different sectors:
Situation 4: if website i is the edge site of sector ID, adjacent sector isWebsite j is sectorEdge station
Point, adjacent sector are that ID can establish S2S mechanism when then meeting condition 5 and 6 simultaneously;
The down receiving signal quality of 5: two sector-edge website of condition should approach, that is, meet
Wherein, Ii,IDFor the received signal quality of base station website i when sector ID emits signal,It is base station in sectorThe received signal quality of website j when emitting signal, α are two website S2S communication thresholds;
There is no neighbouring active stations around 6: two sector-edge website of condition, that is, meet
Wherein, Ii,IDFor the received signal quality website of base station website i when sector ID emits signal, k (k ∈ ΩID) be
Active stations in sector ID, Ik,IDFor base station sector ID emit signal when site k received signal quality,For base station
In sectorThe received signal quality of website j when emitting signal,For sectorIn edge active stations,Indicate that base station passes through sectorThe received signal quality of website m when emitting signal, β indicate the interference to other active stations
Threshold value.
Step 3: while multiple websites pair that can establish S2S mechanism are dispatched, it sends broadcast singal and informs that it establishes S2S machine
System;
Step 4: after website receives the S2S scheduling information of broadcast, establishing S2S link;
Step 5: each S2S communication with low-power to directly being carried out data transmission.
The utility model has the advantages that compared with prior art, the invention has the following advantages that the website obtained according to the sector scanning stage
Grouping information considers that the two edges website of two websites and adjacent sectors in same sector can establish S2S mechanism, simplifies
The selection of S2S website pair;The interference to other neighbouring active stations is avoided by condition judgement in selection S2S website clock synchronization;
S2S communication is carried out simultaneously to low-power by the multiple websites of base station centralized dispatching, improves the performance of whole network.
Detailed description of the invention
Fig. 1 is that site sector is grouped schematic diagram in cell in the embodiment of the present invention;
Specific embodiment
Combined with specific embodiments below, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limit the scope of the invention, after the present invention has been read, those skilled in the art are to various equivalences of the invention
The modification of form falls within the application range as defined in the appended claims.
The embodiment of the invention provides a kind of website dispatching methods of wireless S2S communication system, are scanned by sector-level true
Determine sector locating for user and received signal quality, website is grouped situation as shown in Figure 1, considering in same sector in cell
Two websites and two edges website in adjacent sectors can establish S2S mechanism in the case where meeting certain condition, by base station set
Dispatch multiple S2S websites to and meanwhile communicate.Specifically include following process:
Step 1: website knows sector ID and received signal quality locating for it by sector-level scanning, and feeds back its institute
In sector number ID and received signal quality Ii,ID, and adjacent sector numberWith corresponding received signal qualityWherein website institute
Place's sector ID is the corresponding scanning sector number of scan phase optimum receiving signal quality.In feedback procedure, if website is sector side
Edge website then directly feeds back its adjacent sector numberWith corresponding received signal qualityIf not sector-edge website, then will
Its adjacent sector numberWith corresponding received signal qualityIt empties.
Determine that website is sector-edge website method particularly includes: if the adjacent sector downlink signal quality that receives of website with
Its locating sector downlink signal quality is close, then determines that the website for sector-edge website, that is, meets
Wherein, ε (ε >=0) is edge site decision threshold, and i is site index number, and ID is the sector number where website i,For the adjacent sector number of website i, Ii,IDFor the received signal quality of base station website i when sector ID emits signal,For base station
In sectorThe received signal quality of website i when emitting signal.
Step 2: according to website feedback information, determine whether the website can establish S2S mechanism, method particularly includes:
(1) website i and website j are in same sector ID, can be divided into three kinds of situations:
Situation 1:, can be with when meeting condition 1 and 2 simultaneously if website i and website j are not the edge site of sector ID
Establish S2S direct communication;
The down receiving signal quality of 1: two website of condition should approach, that is, meet
|Ii,ID-Ij,ID|≤α (2)
Wherein, Ii,IDFor the received signal quality of base station website i when sector ID emits signal, Ij,IDIt is base station in sector
The received signal quality of website j when ID emits signal, α are two website S2S communication thresholds;
Condition 2:S2S should avoid the interference to other active stations in sector as far as possible when communicating, i.e. do not deposit around two websites
In neighbouring active stations, meet
|Ii,ID-Ik,ID| >=β and | Ij,ID-Ik,ID|≥β,k∈ΩIDAnd k ≠ i, j (3)
Wherein, Ii,IDFor the received signal quality of base station website i when sector ID emits signal, Ij,IDIt is base station in sector
The received signal quality of website j, site k (k ∈ Ω when ID emits signalID) be sector ID in active stations, Ik,IDFor base station
The received signal quality of site k when sector ID emits signal, β indicate the interference threshold to other active stations.
Situation 2: a website i is the edge site of sector ID if it exists, and the adjacent sector number of website i isIt is then full simultaneously
When sufficient condition 1,2 and 3, S2S direct communication can establish;
Condition 3: the interference to its adjacent sector-edge active stations should be avoided in sector-edge website, that is, meets
|Ii,ID-Im,ID|≥β (4)
Wherein, Ii,IDFor the received signal quality of base station website i when sector ID emits signal, websiteFor
SectorIn edge active stations, Im,IDIndicate the received signal quality of website m when base station emits signal by sector ID, β
Indicate the interference threshold to other active stations.
Situation 3: if website i and website j are the edge site of sector ID, the adjacent sector number of website i isWebsite j's
Adjacent sector number isWhen then meeting condition 1,2,3 and 4 simultaneously, S2S direct communication can establish;
The adjacent sector number of 4: two sector-edge website of condition is identical, that is, meets
(2) website i and website j are in different sectors:
Situation 4: if website i is the edge site of sector ID, adjacent sector isWebsite j is sectorEdge station
Point, adjacent sector are that ID can establish S2S mechanism when then meeting condition 5 and 6 simultaneously;
The down receiving signal quality of 5: two sector-edge website of condition should approach, that is, meet
Wherein, Ii,IDFor the received signal quality of base station website i when sector ID emits signal,It is base station in sectorThe received signal quality of website j when emitting signal, α are two website S2S communication thresholds;
There is no neighbouring active stations around 6: two sector-edge website of condition, that is, meet
Wherein, Ii,IDFor the received signal quality website of base station website i when sector ID emits signal, k (k ∈ ΩID) be
Active stations in sector ID, Ik,IDFor base station sector ID emit signal when site k received signal quality,For base station
In sectorThe received signal quality of website j when emitting signal,For sectorIn edge active stations,Indicate that base station passes through sectorThe received signal quality of website m when emitting signal, β indicate the interference to other active stations
Threshold value.
Step 3: while multiple websites pair that can establish S2S mechanism are dispatched, it sends broadcast singal and informs that it establishes S2S machine
System;
Step 4: after website receives the S2S scheduling information of broadcast, establishing S2S link;
Step 5: each S2S communication with low-power to directly being carried out data transmission.