CN102316525A - Channel resource allocation method for reticular satellite communication system - Google Patents
Channel resource allocation method for reticular satellite communication system Download PDFInfo
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Abstract
The invention relates to a channel resource allocation method for a reticular satellite communication system, which has the main idea that a management terminal station receives the service request information of a terminal station, whether the terminal station is distributed with the carrier wave channel or not is judged according to the carrier wave channel marks in the request information, and then, the carrier wave channels are allocated to the terminal station which are not allocated with the carrier wave channels; the management terminal station carries out resource allocation in each carrier wave channel, and the resource allocation is directly carried out when the current carrier wave channel is greater than or equal to the request band width of the terminal station in the channel resource allocation process; and the terminal station is regulated into other carrier wave channels with the most band width resources for carrying out the channel resource allocation according to requirements when the available band width of the current carrier wave channel is smaller than the request width of the terminal station. In the method, as the mode of allocating the carrier wave channel marks, the carrier wave channel regulation and the signal resources according to the requirements is adopted, the system channel resources can be utilized to a furthest degree during the channel resource allocation of the reticular satellite communication system, and the resource utilization rate of the system and the reliability of the system are improved.
Description
Technical field
The present invention relates to a kind of netted satellite communication system channel resource allocation method, belong to the communications field.
Background technology
The satellite communication management system that communication satellite system is made up of ground based terminal, overhead satellites processing and crosspoint, network management control center together.Important effect is being brought into play in multimedia service fields such as, remote teaching interconnected at DTV, digital broadcasting, wide area, tele-medicine, video conference, video request program.As shown in Figure 1, netted satellite communication system is new broadband VSAT network technology system, and it is a kind of VSAT satellite communication system of not having main website; The at present main MF-TDMA technology that adopts, the shortcoming of big, the maneuverability property difference of earth station when having overcome traditional TDMA system and using has been used for reference the design philosophy of FDMA; FDMA and TDMA are merged; Use carrier jumping frequency in the system, reduce burst rate, reach the purpose that reduces antenna size, reduces radio-frequency power, extended network scale.Netted satellite communication system is the of paramount importance developing direction of current satellite communication, has wide market application prospect, and is significant to the development of China's satellite communication.
Up link is made up of a plurality of carrier channels in the netted satellite communication system, and each carrier channel is subdivided into several slots (as shown in Figure 2) again, is used to guarantee the flexibility of multi-user, multi-service access, improves the satellite system utilization ratio of wireless resources.In the service access stage, to QoS request in the channel architecture of complicacy, the carrying out resource allocation of each connection.Because the satellite lease is by the bandwidth calculation expense; Therefore under the situation of limited channel resource; Be faced with great challenge in multi-user, the management of multiservice environment lower channel resources effective, the efficient channel resource allocation methods becomes the difficult point of netted satellite communication system technology.
Existing satellite channel resource is distributed in the distribution method, and commonplace mainly containing directly carried out distribution method and had the distribution method of channel reservation.Directly distribution method is not taked any allocation strategy, directly carries out channel resource allocation, can produce more channel resource fragment like this, causes the wasting of resources, reduces system effectiveness.The reservation method for channel allocation is introduced the allocation strategy of channel reservation, under the MF-TDMA mode of operation, carries out channel resource allocation according to the channel reservation strategy.But the reservation channel method is certain channel carrier wave of terminal station fixed allocation of initial network entry; Carrier number is often less than the terminal station number in the practical application; So can occur the corresponding carrier wave in a terminal station hardly, some the terminal station traffic carrying capacity on a certain carrier wave is bigger, causes current carrier load to increase the weight of; And the relatively idle situation of all the other carrier waves causes the efficient of channel resource to reduce.
Summary of the invention
The object of the invention is: the deficiency that overcomes prior art; A kind of netted satellite communication system channel resource allocation method is provided; This method comprises the mode that carrier channel sign and channel resource distribution according to need and station, office terminal carry out channel adjustment according to carrier channel available channel resources situation when adopting the terminal station service request; Through this method of operation in the station, office terminal, thereby realize netted satellite communication system finite bandwidth resource lower channel resource dynamic distribution according to need.
Technical solution of the present invention is:
A kind of netted satellite communication system channel resource allocation method is applicable to the netted satellite communication system based on TDMA or MF-TDMA, comprises station, office terminal and a plurality of terminal station in the said netted satellite communication system, and step is following:
(1) station, office terminal receives the service requesting information in a plurality of terminal stations, gets into step (2) afterwards; If comprise in the said service requesting information and treat bandwidth on demand and carrier channel sign, if carrier channel sign 1, then carrier channel has been distributed in the terminal station, if carrier channel sign 0, the then unallocated carrier channel in terminal station;
(2) station, office terminal judges according to the carrier channel sign in the service requesting information of receiving whether this terminal station has distributed carrier channel, as if distributing carrier wave channel, then gets into step (3); If unallocated, then get into step (4);
(3) station, office terminal judge the carrier channel that said terminal station has been distributed remaining bandwidth whether greater than the bandwidth on demand of treating in the service requesting information in this terminal station; If more than or equal to; Then in said carrier channel according to this terminal station treat the request bandwidth allocation resource, get into step (5) afterwards; If less than; Then that the current time load is minimum carrier channel is distributed to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is more than or equal to the bandwidth on demand of treating in this terminal station, then in the minimum carrier channel of said load, treat the request bandwidth allocation resource according to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is less than the bandwidth on demand of treating in this terminal station; The remaining bandwidth of then that said load is minimum carrier channel is distributed to this terminal station; With the treating that bandwidth on demand is stayed in the next assignment period with the difference of the bandwidth of in the minimum carrier channel of said load, distributing and distribute of this terminal station, get into step (5) afterwards;
(4) if current time has idle carrier channel; Then the carrier channel of said free time is distributed to this terminal station; And in the carrier channel of said free time according to this terminal station treat the request bandwidth allocation resource, simultaneously the carrier channel sign is changed to 1, get into step (5) afterwards;
If there is not idle carrier channel; Then that the current time load is minimum carrier channel is distributed to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is more than or equal to the bandwidth on demand of treating in this terminal station, then in the minimum carrier channel of said load, treat the request bandwidth allocation resource according to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is less than the bandwidth on demand of treating in this terminal station; The remaining bandwidth of then that said load is minimum carrier channel is distributed to this terminal station; With the treating that bandwidth on demand is stayed in the next assignment period with the difference of the bandwidth of in the minimum carrier channel of said load, distributing and distribute of this terminal station, get into step (5) afterwards;
(5), then return step (2) and continue to distribute if also have the service requesting information in terminal station not to be assigned with bandwidth; If the service requesting information in all terminal stations all had been assigned with bandwidth, then return step (1), get into the service requesting information that next assignment period continues the processing terminal station.
The minimum carrier channel of said load is meant the carrier channel that employable remaining bandwidth is maximum.
The carrier channel of said free time is that all bandwidth resources of this carrier channel are all unoccupied.
The beneficial effect that the present invention compared with prior art brings is:
(1) the present invention adopts the carrier channel label manner, compares with current direct distribution method and can reduce the channel resource fragment, improves utilization rate of channel resources;
(2) among the present invention according to carrier channel available bandwidth resources situation, carry out the carrier channel adjustment in terminal station, make between each carrier channel load more balanced.
Description of drawings
Fig. 1 is netted satellite communication system sketch map;
Fig. 2 is the channel architecture sketch map;
Fig. 3 is a method flow diagram of the present invention.
Embodiment
The present invention is applicable to based on the netted satellite communication system of TDMA or MF-TDMA technology, in the channel resource management process, carries out channel resource allocation with the superframe in traditional TDMA resource allocation process as an assignment period.
Main thought of the present invention: at first, whether the service requesting information at receiving terminal station, station, office terminal judges terminal station distributing carrier wave channel according to the carrier channel sign in the solicited message, gives the terminal station distributing carrier wave channel of unallocated carrier channel; Secondly, the office terminal stands in carries out resource allocation in each carrier channel, in resource allocation process, if current carrier channel is then directly carried out resource allocation more than or equal to the bandwidth on demand in terminal station; If the available bandwidth resources of current carrier channel less than the bandwidth on demand in terminal station, is then adjusted to this terminal station and is carried out channel resource distribution according to need in the maximum carrier channel of other available bandwidth resources.
Specify practical implementation step of the present invention below in conjunction with accompanying drawing 3, comprise station, office terminal and a plurality of terminal station in the said netted satellite communication system, implementation step is following:
(1) station, office terminal receives the service requesting information in a plurality of terminal stations, gets into step (2) afterwards; If comprise in the said service requesting information and treat bandwidth on demand and carrier channel sign, if carrier channel sign 1, then carrier channel has been distributed in the terminal station, if carrier channel sign 0, the then unallocated carrier channel in terminal station;
(2) station, office terminal judges according to the carrier channel sign in the service requesting information of receiving whether this terminal station has distributed carrier channel, as if distributing carrier wave channel, then gets into step (3); If unallocated, then get into step (4);
(3) station, office terminal judge the carrier channel that said terminal station has been distributed remaining bandwidth whether greater than the bandwidth on demand of treating in the service requesting information in this terminal station; If more than or equal to; Then in said carrier channel according to this terminal station treat the request bandwidth allocation resource, get into step (5) afterwards; If less than; Then that the current time load is minimum carrier channel is distributed to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is more than or equal to the bandwidth on demand of treating in this terminal station, then in the minimum carrier channel of said load, treat the request bandwidth allocation resource according to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is less than the bandwidth on demand of treating in this terminal station; The remaining bandwidth of then that said load is minimum carrier channel is distributed to this terminal station; With the treating that bandwidth on demand is stayed in the next assignment period with the difference of the bandwidth of in the minimum carrier channel of said load, distributing and distribute of this terminal station, get into step (5) afterwards;
(4) if current time has idle carrier channel; Then the carrier channel of said free time is distributed to this terminal station; And in the carrier channel of said free time according to this terminal station treat the request bandwidth allocation resource, simultaneously the carrier channel sign is changed to 1, get into step (5) afterwards;
If there is not idle carrier channel; Then that the current time load is minimum carrier channel is distributed to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is more than or equal to the bandwidth on demand of treating in this terminal station, then in the minimum carrier channel of said load, treat the request bandwidth allocation resource according to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is less than the bandwidth on demand of treating in this terminal station; The remaining bandwidth of then that said load is minimum carrier channel is distributed to this terminal station; With the treating that bandwidth on demand is stayed in the next assignment period with the difference of the bandwidth of in the minimum carrier channel of said load, distributing and distribute of this terminal station, get into step (5) afterwards;
(5), then return step (2) and continue to distribute if also have the service requesting information in terminal station not to be assigned with bandwidth; If the service requesting information in all terminal stations all had been assigned with bandwidth, then return step (1), get into the service requesting information that next assignment period continues the processing terminal station.
Below in conjunction with instantiation implementation of the present invention is described.Suppose currently to have four carrier channels and be respectively carrier channel 0,1,2 and No. 3, each carrier channel is 1000kbps in bandwidth, the dedicated bandwidth resource be respectively 400,500,600,900kbps; The bandwidth on demand in a certain terminal station is 700kbps, and carrier identification is No. 3 carrier waves in the service requesting information in this terminal station; When the service resources solicited message in this terminal station is received at the station, office terminal, at first on No. 3 carrier waves, attempt carrying out resource allocation according to its carrier identification; The station, office terminal is according to No. 3 carrier channel usable bandwidth resources situation, and current carrier channel can not satisfy the resource request in this terminal station; The station, office terminal is adjusted to this terminal station in No. 0 maximum carrier wave of available channel resources; Since in the current assignment period No. 0 carrier wave can with bandwidth be 600kbps, so distribute current available bandwidth resources, will remain unappropriated 100kbps and in next assignment period, carry out resource allocation.
Claims (3)
1. a netted satellite communication system channel resource allocation method is applicable to the netted satellite communication system based on TDMA or M F-TDMA, comprises station, office terminal and a plurality of terminal station in the said netted satellite communication system, it is characterized in that step is following:
(1) station, office terminal receives the service requesting information in a plurality of terminal stations, gets into step (2) afterwards; If comprise in the said service requesting information and treat bandwidth on demand and carrier channel sign, if carrier channel sign 1, then carrier channel has been distributed in the terminal station, if carrier channel sign 0, the then unallocated carrier channel in terminal station;
(2) station, office terminal judges according to the carrier channel sign in the service requesting information of receiving whether this terminal station has distributed carrier channel, as if distributing carrier wave channel, then gets into step (3); If unallocated, then get into step (4);
(3) station, office terminal judge the carrier channel that said terminal station has been distributed remaining bandwidth whether greater than the bandwidth on demand of treating in the service requesting information in this terminal station; If more than or equal to; Then in said carrier channel according to this terminal station treat the request bandwidth allocation resource, get into step (5) afterwards; If less than; Then that the current time load is minimum carrier channel is distributed to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is more than or equal to the bandwidth on demand of treating in this terminal station, then in the minimum carrier channel of said load, treat the request bandwidth allocation resource according to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is less than the bandwidth on demand of treating in this terminal station; The remaining bandwidth of then that said load is minimum carrier channel is distributed to this terminal station; With the treating that bandwidth on demand is stayed in the next assignment period with the difference of the bandwidth of in the minimum carrier channel of said load, distributing and distribute of this terminal station, get into step (5) afterwards;
(4) if current time has idle carrier channel; Then the carrier channel of said free time is distributed to this terminal station; And in the carrier channel of said free time according to this terminal station treat the request bandwidth allocation resource, simultaneously the carrier channel sign is changed to 1, get into step (5) afterwards;
If there is not idle carrier channel; Then that the current time load is minimum carrier channel is distributed to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is more than or equal to the bandwidth on demand of treating in this terminal station, then in the minimum carrier channel of said load, treat the request bandwidth allocation resource according to this terminal station; If the remaining bandwidth of the carrier channel that said load is minimum is less than the bandwidth on demand of treating in this terminal station; The remaining bandwidth of then that said load is minimum carrier channel is distributed to this terminal station; With the treating that bandwidth on demand is stayed in the next assignment period with the difference of the bandwidth of in the minimum carrier channel of said load, distributing and distribute of this terminal station, get into step (5) afterwards;
(5), then return step (2) and continue to distribute if also have the service requesting information in terminal station not to be assigned with bandwidth; If the service requesting information in all terminal stations all had been assigned with bandwidth, then return step (1), get into the service requesting information that next assignment period continues the processing terminal station.
2. a kind of netted satellite communication system channel resource allocation method according to claim 1 is characterized in that: the minimum carrier channel of said load is meant the carrier channel that employable remaining bandwidth is maximum.
3. a kind of netted satellite communication system channel resource allocation method according to claim 1 is characterized in that: the carrier channel of said free time is all unoccupied for all bandwidth resources of this carrier channel.
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Cited By (8)
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| CN102665278A (en) * | 2012-04-06 | 2012-09-12 | 航天恒星科技有限公司 | Satellite communication mesh network terminal station |
| CN102752800A (en) * | 2012-06-28 | 2012-10-24 | 重庆大学 | Carrier channel selection method for multi-frequency-time division multiple access (MF-TDMA) satellite system |
| CN103686826A (en) * | 2012-09-18 | 2014-03-26 | 普天信息技术研究院有限公司 | Admission control method of carrier aggregation system |
| CN103338480B (en) * | 2013-06-03 | 2015-09-16 | 林星石 | Satellite communication earth station, ground receiving system and communication means |
| CN104967996A (en) * | 2015-07-08 | 2015-10-07 | 国家电网公司 | Network access authentication method and system of satellite communication network |
| WO2018082594A1 (en) * | 2016-11-07 | 2018-05-11 | 中兴通讯股份有限公司 | Method and device for accessing satellite communications network |
| CN109756949A (en) * | 2017-08-22 | 2019-05-14 | 大唐移动通信设备有限公司 | A kind of resource allocation methods and device |
| CN110932772A (en) * | 2019-11-25 | 2020-03-27 | 上海欧科微航天科技有限公司 | Satellite-based data communication system and method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102665278A (en) * | 2012-04-06 | 2012-09-12 | 航天恒星科技有限公司 | Satellite communication mesh network terminal station |
| CN102665278B (en) * | 2012-04-06 | 2015-09-23 | 航天恒星科技有限公司 | A kind of satellite communication mesh network terminal station |
| CN102752800A (en) * | 2012-06-28 | 2012-10-24 | 重庆大学 | Carrier channel selection method for multi-frequency-time division multiple access (MF-TDMA) satellite system |
| CN103686826A (en) * | 2012-09-18 | 2014-03-26 | 普天信息技术研究院有限公司 | Admission control method of carrier aggregation system |
| CN103686826B (en) * | 2012-09-18 | 2016-09-21 | 普天信息技术研究院有限公司 | A kind of acceptance controlling method in carrier aggregation system |
| CN103338480B (en) * | 2013-06-03 | 2015-09-16 | 林星石 | Satellite communication earth station, ground receiving system and communication means |
| CN104967996A (en) * | 2015-07-08 | 2015-10-07 | 国家电网公司 | Network access authentication method and system of satellite communication network |
| WO2018082594A1 (en) * | 2016-11-07 | 2018-05-11 | 中兴通讯股份有限公司 | Method and device for accessing satellite communications network |
| CN109756949A (en) * | 2017-08-22 | 2019-05-14 | 大唐移动通信设备有限公司 | A kind of resource allocation methods and device |
| CN109756949B (en) * | 2017-08-22 | 2021-01-22 | 大唐移动通信设备有限公司 | Resource allocation method and device |
| CN110932772A (en) * | 2019-11-25 | 2020-03-27 | 上海欧科微航天科技有限公司 | Satellite-based data communication system and method |
| CN110932772B (en) * | 2019-11-25 | 2022-02-11 | 上海欧科微航天科技有限公司 | Satellite-based data communication system and method |
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