CN101420257B - Method for multiple small station access in satellite communication system - Google Patents
Method for multiple small station access in satellite communication system Download PDFInfo
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- CN101420257B CN101420257B CN200810239748A CN200810239748A CN101420257B CN 101420257 B CN101420257 B CN 101420257B CN 200810239748 A CN200810239748 A CN 200810239748A CN 200810239748 A CN200810239748 A CN 200810239748A CN 101420257 B CN101420257 B CN 101420257B
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Abstract
The present invention provides a method for multiple small stations access method of a satellite communication system. The main station periodically inputs information such as a service table, a system state and the like which are needed by the system through a forward signaling broadcast small station; according to the number of synchronous idle time slots of a link, the system state is divided into three types that are an idle-free synchronous time slot state, an idle-enough synchronous time slot state and an idle-first synchronous time slot state; the small station divides the priority of the access system into a high priority and a common priority according to the service features; after receiving necessary access information such as the service table, the system state and the like, the small station compares the priority and the system state, and corresponding access operation is not adopted unless the system state allows access of the current small station; according to the present invention, conflict generated during the access of the system can be reduced effectively and the access speed can be improved.
Description
Technical field
The present invention relates to the method that the many small stations of satellite communication system are inserted, particularly relate to many small stations cut-in method of DVB-RCS system.
Background technology
Satellite communication does not receive the constraint of geographical environment and distance; It is put multiple spot, puts face ground covering advantage and flexible movement property; Make satellite communication that remarkable advantages arranged in the communications field, the DVB-RCS system that particularly has return path has shown the superiority of satellite communication more especially in current satellite communication applications.
In the DVB-RCS system, the small station connecting system mainly refers to after the small station receives the broadcast of main website, in the access slot that broadcast provides, sends the request of access.Access slot is quite limited on carrier wave in the DVB-RCS system; Normally only limited access slot will guarantee to be higher than the access in the small station of the access slot number order of magnitude far away; And the mode of general small station connecting system is the state that current system is not known in the small station; After each small station of preparing connecting system receives broadcast; All are prepared the small station of connecting system and just all in same access slot, send the request of access, and promptly a plurality of small stations remove to compete same access slot simultaneously, and the obvious like this small station that causes easily produces conflict when inserting.
The small station cut-in method is to guarantee under the prerequisite of the normal effectively connecting system in small station the conflict in the time of as far as possible reducing the small station access efficiently.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of satellite communication system method that many small stations are inserted is provided, can effectively reduce the conflict of small station when connecting system, accelerate the process of small station connecting system, and the load that can effectively alleviate network control software.
The object of the invention is achieved through following technical scheme:
The method that the many small stations of a kind of satellite communication system are inserted is characterized in that comprising the steps:
(1) carries out defining of system mode according to the synchronization slot situation of the free time in the current system; Be total N synchronization slot in the current system; Suppose only surplus m (m＜N in the system; The m value can be confirmed according to the actual conditions of system) be defined as preferential idle synchronization slot state during individual synchronization slot, be defined as no idle synchronization slot state when not remaining synchronization slot in the system, the system mode under all the other situation is defined as sufficient idle synchronization slot state; Simultaneously according to type of service priority classification is carried out in the small station in the system, the type of service of promptly handling according to the small station is divided into high priority and two kinds of ranks of normal priority with the small station;
(2) if receive the business information that the small station connecting system of broadcasting needs; And the connecting system operation is prepared to carry out in the small station; Just compare priority of oneself and current system mode in the small station; If the small station is normal priority, system mode then gets into step (4) when being in preferential idle synchronization slot; If the small station is normal priority, system mode then gets into step (3) when being in sufficient idle synchronization slot state; If the small station is high priority,, system mode then gets into step (3) when being in preferential idle synchronization slot state or sufficient idle synchronization slot state, when system mode during for no idle synchronization slot state, no matter the small station all gets into step (4) for which kind of priority;
(3) send landing request information, judge whether refusal login behind the feedback information of reception main website, then get into step (4) as being refused login by system by system, otherwise entering step (5);
(4) withdraw from this register;
(5) small station receives the synchronization slot information that main website distributes, and carries out simultaneous operation.
In the method that the many small stations of above-mentioned satellite communication system are inserted, simultaneous operation comprises the steps:
(1) Synchronization Status Message in small station is sent in the small station at synchronization slot;
(2) receive the synchronous adjustment information in small station that main website sends, and do the adjustment of respective synchronization state, and whether needs log off with system mode according to current small station, log off if desired, then get into step (3), otherwise entering step (1);
(3) log off.
The present invention's beneficial effect compared with prior art is described below:
Because technical scheme of the present invention is carried out classification according to idle synchronization slot in the current system to system mode: when not having idle synchronization slot in the system, sign is changed to " SYNC_NONE "; When sufficient idle synchronization slot is arranged in the system, sign is changed to " SYNC_ABUND "; In system, there is a certain amount of synchronization slot, but needs preferential the assurance to distribute to the high small station of priority, sign is changed to " SYNC_PRECED ".
The present invention simultaneously classifies according to the priority of connecting system to the small station; The type of service of promptly handling according to the small station is divided into high priority (being expressed as PRIOR) and two kinds of ranks of normal priority (being expressed as NORMAL) with the small station, and carries out the corresponding operation of small station connecting system according to priority in the small station during connecting system.
Carry out corresponding access operation according to small station priority and system mode: when business information and the system status information that the small station login of broadcasting needs received in the small station; The small station priority that just the following permission of the priority in small station and current system mode is inserted compares; If hope that the priority in the small station of connecting system reaches the requirement of current state; This small station is just sent the corresponding solicited message that inserts to main website and is carried out access operation; Otherwise just do not send the connecting system solicited message; Thereby effectively alleviated the small station that possibly occur in the common access way and do not known the state of current system, thus be hopeful connecting system the small station all remove to compete the probability that same access slot clashes at synchronization.
And general access way is to adopt the mode of random delay to handle conflict, the burden when this mode obviously can increase the weight of main website and inserts in the small station, and reduced the efficient of the access in small station, and can not guarantee that the small station of high priority preferentially inserts,
Description of drawings
Fig. 1 is the flow chart of many small stations of satellite communication system of the present invention cut-in method;
Embodiment
Specify the practical implementation step of the method that inserts in the many small stations of satellite communication system of the present invention below in conjunction with accompanying drawing:
(1) at first system carries out defining and identifying of system mode according to the idle synchronization slot of current link; Be total total N synchronization slot in the current system; Suppose only surplus m (m＜N in the system; The m value can be confirmed according to the actual conditions of system) be defined as preferential idle synchronization slot state (being expressed as the SYNC_PRECED state) during individual synchronization slot; Be defined as no idle synchronization slot state (being expressed as the SYNC_NONE state) when not remaining synchronization slot in the system, the system mode under all the other situation is defined as sufficient idle synchronization slot state (being expressed as the SYNC_ABUND state).
For example the road always has 16 synchronization slots in the current chain of system; And only the state of 2 synchronization slots of system residue is decided to be preferential idle synchronization slot state; And when remaining synchronization slot, system is decided to be sufficient idle synchronization slot state more than 2, when not having remaining synchronization slot in the system, system mode is decided to be no idle synchronization slot state;
Simultaneously according to type of service priority classification is carried out in the small station in the system, the type of service of promptly handling according to the small station is divided into high priority (being expressed as PRIOR) and two kinds of ranks of normal priority (being expressed as NORMAL) with the small station; For example the small station when pre-treatment be that VIP user's business is a high priority with this small station just, the small station of the business of processing domestic consumer is a normal priority.
(2) flow process of small station connecting system is as shown in Figure 1.At first the small station receives the necessary service information list of small station connecting system from main website broadcasting; Wherein comprise system's current state information; The small station judges according to system status information and small station priority whether the small station can send the connecting system solicit operation this moment, and concrete steps are then:
Priority of oneself and current system mode are compared in the small station, if the priority in small station is NORMAL, then get into step (4) when system mode is in SYNC_PRECED; If the priority in small station is NORMAL, when being in SYNC_ABUND, system mode then gets into step (3); If the priority in small station is PRIOR,, system mode then gets into step (3) when being in SYNC_PRECED state or SYNC_ABUN D state, when system mode is the SYNC_NONE state, no matter the small station all gets into step (4) for which kind of priority;
(3) send landing request information, judge whether refusal login behind the feedback information of reception main website, then get into step (4) as being refused login by system by system, otherwise entering step (5);
(4) withdraw from this register;
(5) small station receives the synchronization slot information that main website distributes, and gets into step (6).
(6) main website is given at the Synchronization Status Message that synchronization slot sends the small station in the small station, gets into step (7);
(7) receive the synchronous adjustment information in small station that main website sends; The adjustment of synchronous regime is carried out in the small station based on synchronous adjustment information; And judge based on current small station and system mode whether the small station initiatively logs off or logged off by system requirements, if just get into step (8), otherwise get into step (6);
(8) this small station logs off.
After the step of accomplishing above-mentioned (1)-(5), the interactive operation with the connecting system of main website has been accomplished in the small station, and follow-up (6)-(8) are business operation is carried out in the small station in system flow processs.
The present invention can support many small stations to insert satellite communication system fast; Main website carries out the broadcast system state according to the idle synchronization slot situation that exists in the current link, and the small station then judges under current system mode whether can carry out access operation according to self priority and system mode.This method obviously than defined in the puppy parc behind main website broadcasting access grant message, this mode that access operation can be carried out in all small stations more can reduce the conflict of small station when connecting system and take place.And also reduced the burden of main website to a certain extent.
The content of not doing to describe in detail in the specification of the present invention belongs to this area professional and technical personnel's known technology.
Claims (2)
1. the method that the many small stations of satellite communication system are inserted is characterized in that comprising the steps:
(1) carries out defining of system mode according to the synchronization slot situation of the free time in the current system; Be total N synchronization slot in the current system; Suppose being defined as preferential idle synchronization slot state in the system during only surplus m synchronization slot; Be defined as no idle synchronization slot state when not remaining synchronization slot in the system, the system mode under all the other situation is defined as sufficient idle synchronization slot state; Simultaneously according to type of service priority classification is carried out in the small station in the system, the type of service of promptly handling according to the small station is divided into high priority and two kinds of ranks of normal priority with the small station;
M＜N wherein, the m value is confirmed according to the actual conditions of system;
(2) if the small station receives the necessary business information of small station connecting system from main website broadcasting; And the connecting system operation is prepared to carry out in the small station; Priority of oneself and current system mode are compared in the small station; If the small station is normal priority, system mode then gets into step (4) when being in preferential idle synchronization slot; If the small station is normal priority, system mode then gets into step (3) when being in sufficient idle synchronization slot state; If the small station is high priority,, system mode then gets into step (3) when being in preferential idle synchronization slot state or sufficient idle synchronization slot state, when system mode during for no idle synchronization slot state, no matter the small station all gets into step (4) for which kind of priority;
(3) send landing request information, judge whether refusal login behind the feedback information of reception main website, then get into step (4) as being refused login by system by system, otherwise entering step (5);
(4) withdraw from this register;
(5) small station receives the synchronization slot information that main website distributes, and carries out simultaneous operation.
2. the cut-in method in the many small stations of a kind of satellite communication system according to claim 1 is characterized in that simultaneous operation comprises the steps: described in the step (5)
(6) Synchronization Status Message in small station is sent in the small station at synchronization slot;
(7) receive the synchronous adjustment information in small station that main website sends, and do the adjustment of respective synchronization state, and whether needs log off with system mode according to current small station, log off if desired, then get into step (8), otherwise entering step (6);
(8) log off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200810239748A CN101420257B (en) | 2008-12-17 | 2008-12-17 | Method for multiple small station access in satellite communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810239748A CN101420257B (en) | 2008-12-17 | 2008-12-17 | Method for multiple small station access in satellite communication system |
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| CN101420257A CN101420257A (en) | 2009-04-29 |
| CN101420257B true CN101420257B (en) | 2012-09-26 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115226228B (en) * | 2022-08-30 | 2022-11-22 | 成都星联芯通科技有限公司 | Time slot allocation method, time slot allocation device, master station equipment and storage medium |
| CN117200871B (en) * | 2023-11-06 | 2024-01-30 | 成都本原星通科技有限公司 | Satellite communication resource allocation method based on terminal position and service priority |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4513416A (en) * | 1982-03-10 | 1985-04-23 | Nippon Electric Co., Ltd. | System for adjusting a time axis by using a control and an adjustment time slot in a satellite station of a TDMA network |
| CN101115299A (en) * | 2007-07-25 | 2008-01-30 | 上海华为技术有限公司 | Method and apparatus for controlling user access |
| CN101179321A (en) * | 2007-12-13 | 2008-05-14 | 北京卫星信息工程研究所 | Method for implementing wireless resource management of satellite communication system |
| CN101193054A (en) * | 2006-11-28 | 2008-06-04 | 华为技术有限公司 | A method and system for data transmission and node devices and coordination device |
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2008
- 2008-12-17 CN CN200810239748A patent/CN101420257B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4513416A (en) * | 1982-03-10 | 1985-04-23 | Nippon Electric Co., Ltd. | System for adjusting a time axis by using a control and an adjustment time slot in a satellite station of a TDMA network |
| CN101193054A (en) * | 2006-11-28 | 2008-06-04 | 华为技术有限公司 | A method and system for data transmission and node devices and coordination device |
| CN101115299A (en) * | 2007-07-25 | 2008-01-30 | 上海华为技术有限公司 | Method and apparatus for controlling user access |
| CN101179321A (en) * | 2007-12-13 | 2008-05-14 | 北京卫星信息工程研究所 | Method for implementing wireless resource management of satellite communication system |
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