CN103906069B - Channel method - Google Patents
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- CN103906069B CN103906069B CN201410065352.5A CN201410065352A CN103906069B CN 103906069 B CN103906069 B CN 103906069B CN 201410065352 A CN201410065352 A CN 201410065352A CN 103906069 B CN103906069 B CN 103906069B
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Abstract
The present invention provides a kind of channel method, the described method comprises the following steps: S1: the vacant channel number and channel reservation number of statistics current edge wave beam, and judges the position of the relatively described current edge wave beam of user currently newly accessed;S2: according to the vacant channel number and channel reservation number of the current edge wave beam, preferentially distributing to the user for channel reservation, if the current edge wave beam distributes to the user without channel reservation, by the vacant channel of the current edge wave beam；S3: if without vacant channel in the current edge wave beam, channel is carried out according to the position of the relatively described current edge wave beam of the user；S4: it is periodically executed step S1 to S3.The present invention utilizes this identical feature of each edge Beam resources of satellite communication system, and issuable co-channel interference situation is optimized when being directed to channel, and then improves channel utilization.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of channel methods.
Background technique
It is graduallyd mature as land honeycomb 3G technology is commercial, 4G technology is expected to come into operation comprehensively in the recent period.And with land
Corresponding ground cell mobile communication systems are to solve the problems, such as that the next-generation broadband mobile of terrestrial cellular system coverage area is defended
Star communication system also becomes research hotspot.Next-generation Wide-Band Satellite Mobile system is intended to provide wider region covering
With higher transmission rate.Main purpose is that the LTE system related key technical of ground maturation is introduced to satellite system, such as more
Input multi output (Multiple-Input Multiple-Out-put, MIMO), orthogonal frequency division multiple access (OrthogonalFreq
UencyDivisionMultiplexing, OFDM).Wherein, with the increase of mobile service amount, in short supply this of frequency spectrum resource is asked
The importance of topic is just increasingly prominent.
Channel allocation technique is broadly divided into fixed channel assignment (Fixed Channel Allocation) and dynamic channel
It distributes (Dynamic Channel Allocation).As the improvement of fixed channel assignment, channel (Channel
Borrowing) technology proposes the case where burst communication occur to solve some cell in the last century 90's.It is mainly thought
Want to borrow channel to the cell of light load around in the case where user volume surge occurs in some cell so that user connects
Enter.Channel is according to whether limitation peripheral cell is divided into two classes: Channel Borrowing using the frequency borrowed
With Locking and Channel Borrowing Without Locking.The former thinking is notified after borrowing channel
Adjacent cell cannot use the channel to avoid co-channel interference；The thinking of the latter is the hair by reducing this cell on borrowed channel
Power is penetrated to reduce the influence of co-channel interference.Therefore, Channel Borrowing With Locking technology reduces periphery
The number of available channels of cell, and Channel Borrowing Without Locking technology is for this cell, due to drop
Low transmission power, so performance can not reach best.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is a kind of channel method is provided, to overcome channel benefit in the prior art
With the not high defect of rate.
(2) technical solution
In order to solve the above technical problems, the described method comprises the following steps the present invention provides a kind of channel method:
S1: the vacant channel number and channel reservation number of statistics current edge wave beam, and judge the user's phase currently newly accessed
To the position of the current edge wave beam;
S2: according to the vacant channel number and channel reservation number of the current edge wave beam, preferentially channel reservation is distributed
To the user, if the current edge wave beam distributes to the vacant channel of the current edge wave beam without channel reservation
The user；
S3: if without vacant channel in the current edge wave beam, according to the relatively described current edge wave beam of the user
Position carry out channel；
S4: it is periodically executed step S1 to S3.
Further, step S2 is specifically included:
The channel reservation number of current edge wave beam is counted, channel reservation, then distribute to the use for channel reservation if it exists
Family uses；If without channel reservation, and there are vacant channels for the current edge wave beam, then distribute vacant channel makes to the user
With if the vacant channel of the distribution does not cause co-channel interference, in corresponding edge, wave beam reserves corresponding channel, the correspondence
Edge wave beam is the edge wave beam with one beam position of the current edge beam separation.
Further, when the user terminates communication, the channel behaviour in service of the corresponding edge wave beam is counted, if institute
It states corresponding channel and is in idle state, then discharge the vacant channel for distributing and obtaining, and release corresponding channel
Reservation state；If corresponding channel is in occupied state, the vacant channel that the distribution obtains is converted to reserved
State.
Further, step S3 is specifically included:
If the region that the user is in the current edge wave beam and central beam collectively covers, the current edge
Wave beam gives the user, and the channel locks that will be borrowed in central beam to central beam borrow channel distribution, when described
User terminates after returning to central beam using and by the channel that is borrowed, releases the locking of borrowed channel；
If the user is in the region that the current edge wave beam and adjacent area edge wave beam collectively cover, to adjacent area side
Edge wave beam borrows channel, if the channel borrowed does not generate co-channel interference, the channel distribution borrowed is made to the user
With；If causing co-channel interference, i.e., borrowed channel is used there are other user for current edge wave beam, then described current
Edge wave beam and adjacent area edge wave beam are by borrowed channel, using different time-gap as differentiation, the respectively described user and
The other user transmits data；
If the user is in the central area of current edge wave cover, phase is found in the neighbouring region of the user
Adjacent user so that the user and the neighboring user share channel, and transmits data by different time-gap respectively.
Further, if the user is in the central area of current edge wave cover, preferential find is being communicated
Neighboring user so that the user and the obtained neighboring user found share channel, and pass through different time-gap biography respectively
Transmission of data.
Further, if the user is in the region that the current edge wave beam and adjacent area edge wave beam collectively cover,
And edge wave beam in adjacent area is without vacant channel, then the user and adjacent and communicating user sharing channel, and passes through difference
Slot transmission data.
(3) beneficial effect
The present invention utilizes this identical feature of each edge Beam resources of satellite communication system, and is directed to possible when channel
The co-channel interference situation of generation is optimized, and then improves channel utilization.
Detailed description of the invention
Fig. 1 is a kind of flow chart for channel method that embodiment of the present invention provides；
Fig. 2 is the flow chart for another channel method that embodiment of the present invention provides；
Fig. 3 is the schematic diagram that the cell pattern that embodiment of the present invention provides uses edge wave beam.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Fig. 1 is a kind of flow chart for channel method that embodiment of the present invention provides, comprising the following steps:
S1: the vacant channel number and channel reservation number of statistics current edge wave beam, and judge the user's phase currently newly accessed
To the position of the current edge wave beam;
S2: according to the vacant channel number and channel reservation number of the current edge wave beam, preferentially channel reservation is distributed
To the user, if the current edge wave beam distributes to the vacant channel of the current edge wave beam without channel reservation
The user；
S3: if without vacant channel in the current edge wave beam, according to the relatively described current edge wave beam of the user
Position carry out channel；
S4: it is periodically executed step S1 to S3.
Wherein, step S2 is specifically included:
The channel reservation number of current edge wave beam is counted, channel reservation, then distribute to the use for channel reservation if it exists
Family uses；If without channel reservation, and there are vacant channels for the current edge wave beam, then distribute vacant channel makes to the user
With if the vacant channel of the distribution does not cause co-channel interference, in corresponding edge, wave beam reserves corresponding channel, the correspondence
Edge wave beam is the edge wave beam with one beam position of the current edge beam separation.
Wherein, when the user terminates communication, the channel behaviour in service of the corresponding edge wave beam is counted, if the phase
The channel answered is in idle state, then discharges the vacant channel for distributing and obtaining, and release the pre- of corresponding channel
Stay state；If corresponding channel is in occupied state, the obtained vacant channel that distributes is converted into reservation state.
Wherein, step S3 is specifically included:
If the region that the user is in the current edge wave beam and central beam collectively covers, the current edge
Wave beam gives the user, and the channel locks that will be borrowed in central beam to central beam borrow channel distribution, when described
User terminates after returning to central beam using and by the channel that is borrowed, releases the locking of borrowed channel.
If the user is in the region that the current edge wave beam and adjacent area edge wave beam collectively cover, to adjacent area side
Edge wave beam borrows channel, if the channel borrowed does not generate co-channel interference, the channel distribution borrowed is made to the user
With；If causing co-channel interference, i.e., borrowed channel is used there are other user for current edge wave beam, then described current
Edge wave beam and adjacent area edge wave beam are by borrowed channel, using different time-gap as differentiation, the respectively described user and
The other user transmits data.
If the user is in the central area of current edge wave cover, phase is found in the neighbouring region of the user
Adjacent user so that the user and the neighboring user share channel, and transmits data by different time-gap respectively.
Wherein, if the user is in the central area of current edge wave cover, communicating phase is preferentially found
Adjacent user so that the user and the obtained neighboring user of finding share channel, and transmits number by different time-gap respectively
According to.
Wherein, if the user is in the region that the current edge wave beam and adjacent area edge wave beam collectively cover, and it is adjacent
Area edge wave beam is without vacant channel, then the user and adjacent and communicating user sharing channel, and passes through different time-gap
Transmit data.
In addition, the step of channel method of embodiment of the present invention, can also be as shown in Figure 2.
Wherein, the case where user new for synchronous satellite edge wave beam accesses.As shown in figure 3, edge wave beam a has one at this time
A new user attempts access, and edge wave beam a still has vacant channel.The remaining channel conditions for primarily looking at wave beam a at this time, if depositing
In channel reservation f1, then channel reservation is distributed into new user；If edge wave beam a distributes a vacant channel f without channel reservation2
To new user, it is assumed that channel f2Co-channel interference will not be caused to periphery user, then new user uses channel f2It is communicated, and
Channel reservation f in edge wave beam c, e2, after preferentially use channel reservation f after new user accesses edge wave beam c, e2。
The case where communication release channel is terminated for synchronous satellite edge wave beam user.In cell pattern shown in Fig. 3,
Edge wave beam a has a user to terminate to communicate at this time, channel f to be discharged1.Channel f in wave beam c, e is primarily looked at this time1Use feelings
Condition, if channel f in wave beam c, e1It is in idle condition (i.e. channel f1Still in reservation state, there is no user's access at this moment
Using), then wave beam a, c, e discharges channel f simultaneously1, waiting redistributes；If at least there is a wave beam in wave beam c, e
Use channel f1, then user is released in wave beam a to channel f1Occupancy after, channel f1Reservation state is still kept, when new user connects
After entering edge wave beam a, channel f is preferentially used1。
The case where user new for synchronous satellite edge wave beam accesses.User is more at this time by edge wave beam a, edge wave beam a
Channel resource be all assigned, still there is user to attempt access, the geographical location according to wave beam a in edge to be accessed is true at this time
Determine channel and shared rule.
If new user is located at edge wave beam a and central beam is overlapping covered, it is assumed that central beam there are vacant channel,
Then at this time edge wave beam a to central beam borrow channel f1And it distributes to new user and uses (because of central beam and edge wave beam
Using different frequency ranges, therefore do not consider interference effect).When user terminates to communicate, then channel f is discharged1And return to central beam.
If new user is located at edge wave beam a and edge wave beam b is overlapping covered.Assuming that edge wave beam b accessing user's ratio
Less, there are vacant channels, then at this time edge wave beam a to wave beam b borrow channel f1If channel f1For the UE around new user
Co-channel interference is not caused, then by channel f1It is distributed directly to new user to use, channel f is discharged after sign off1And return to edge
Wave beam b；If channel f1To the UE near new user1Cause co-channel interference, i.e., UE at this time1Occupying the channel f in wave beam a1It carries out
Communication.At this point, edge wave beam a and edge wave beam b use channel f1Cooperation is new user and UE1Communication, i.e., new user and UE1
Data are received in different time-gap respectively, the influence of co-channel interference bring can be reduced in this way, and improve frequency spectrum to a certain extent
Utilization rate.
If new user is located at the central area of edge wave beam a.It can be geographical location that a UE(is then found around new user
On the UE nearest apart from the new user), it is assumed that find obtained UE1Just in busy channel f1It is communicated, at this point, edge wave
Shu Liyong channel f1, transmit new user and UE respectively by different time-gap1Data information, on the basis of reducing co-channel interference
Communication channel is provided for two users.Wherein, the central area of edge wave beam be the edge wave beam not with the covering of other wave beams
The mutually duplicate region in region.
The channel method that embodiment of the present invention provides, according to Channel Sharing principle, adjacent area wave beam passes through identical letter
Road, according to different time-gap to the UE cooperation transmission data of shared channel, without reducing this cell using the function on borrowed channel
Rate, limitation peripheral cell can effectively avoid problem of co-channel interference using borrowed channel.In addition, the present invention utilizes satellite communication
This identical feature of each edge Beam resources of system, and when being directed to channel issuable co-channel interference situation carried out it is excellent
Change, and then improve channel utilization, making the frequency duplex factor as one of whole system is approximately 1.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (5)
1. a kind of channel method, which is characterized in that the described method comprises the following steps:
S1: the vacant channel number and channel reservation number of statistics current edge wave beam, and judge the user currently newly accessed with respect to institute
State the position of current edge wave beam；
S2: according to the vacant channel number and channel reservation number of the current edge wave beam, channel reservation is preferentially distributed into institute
User is stated, if the current edge wave beam is distributed to the vacant channel of the current edge wave beam described without channel reservation
User；
S3: if without vacant channel in the current edge wave beam, according to the position of the relatively described current edge wave beam of the user
Set carry out channel；
S4: it is periodically executed step S1 to S3；
Wherein, step S3 is specifically included:
If the region that the user is in the current edge wave beam and central beam collectively covers, the current edge wave beam
The user, and the channel locks that will be borrowed in central beam are given to central beam borrow channel distribution, as the user
After terminating using and the channel borrowed being returned to central beam, the locking of borrowed channel is released；
If the user is in the region that the current edge wave beam and adjacent area edge wave beam collectively cover, to adjacent area edge wave
Beam borrows channel, if the channel borrowed does not generate co-channel interference, the channel distribution borrowed is used to the user；If
Cause co-channel interference, i.e. borrowed channel is used there are other user for current edge wave beam, then the current edge
Wave beam and adjacent area edge wave beam are by borrowed channel, using different time-gap as differentiation, the respectively described user and described
Other user transmits data；
If the user is in the central area of current edge wave cover, adjacent use is found in the neighbouring region of the user
Data so that the user and the neighboring user share channel, and are transmitted by different time-gap respectively in family.
2. a kind of channel method according to claim 1, which is characterized in that step S2 is specifically included:
The channel reservation number of current edge wave beam is counted, if it exists channel reservation, then channel reservation is distributed to the user makes
With；If without channel reservation, and there are vacant channels for the current edge wave beam, then distributes vacant channel and is used to the user,
If the vacant channel of the distribution does not cause co-channel interference, in corresponding edge, wave beam reserves corresponding channel, the corresponding sides
Edge wave beam is the edge wave beam with one beam position of the current edge beam separation.
3. a kind of channel method according to claim 2, which is characterized in that when the user terminates communication, system
The channel behaviour in service of the corresponding edge wave beam is counted, if corresponding channel is in idle state, release is described to divide
With obtained vacant channel, and release the reservation state of corresponding channel；If corresponding channel is in occupied state,
The obtained vacant channel that distributes then is converted into reservation state.
4. a kind of channel method according to claim 3, which is characterized in that if the user is in current edge wave
The central area of beam covering, then preferentially find communicating neighboring user, so that the user and the phase found and obtained
Adjacent user sharing channel, and data are transmitted by different time-gap respectively.
5. a kind of channel method according to claim 3, which is characterized in that if the user, which is in described, works as front
The region that edge wave beam and adjacent area edge wave beam collectively cover, and edge wave beam in adjacent area is without vacant channel, then the user with it is adjacent
And communicating user sharing channel, and data are transmitted by different time-gap.
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| CN201410065352.5A CN103906069B (en) | 2014-02-25 | 2014-02-25 | Channel method |
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| CN111726183B (en) * | 2020-06-29 | 2021-07-06 | 南方电网数字电网研究院有限公司 | Channel allocation method and device for sensor communication and computer equipment |
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| WO2009070930A1 (en) * | 2007-12-05 | 2009-06-11 | Zte Corporation | System and method for implementing uplink transmission by borrowing or sharing spectrums and channel resources of neighbor cells |
| CN101998650A (en) * | 2009-08-31 | 2011-03-30 | 上海交通大学 | Channel allocation method and system in wireless communication system |
| CN103052163A (en) * | 2012-12-07 | 2013-04-17 | 北京邮电大学 | Channel borrowing method |
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- 2014-02-25 CN CN201410065352.5A patent/CN103906069B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009070930A1 (en) * | 2007-12-05 | 2009-06-11 | Zte Corporation | System and method for implementing uplink transmission by borrowing or sharing spectrums and channel resources of neighbor cells |
| CN101998650A (en) * | 2009-08-31 | 2011-03-30 | 上海交通大学 | Channel allocation method and system in wireless communication system |
| CN103052163A (en) * | 2012-12-07 | 2013-04-17 | 北京邮电大学 | Channel borrowing method |
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