JPH0380716A - Satellite communication control system - Google Patents

Abstract

PURPOSE:To improve the throughput and to improve the circuit use efficiency of a whole system by taking statistics of the satellite circuit use frequency of each slave station, and allocating preferentially a frequency allocation request data transmitting slot to the slave station whose use frequency is high. CONSTITUTION:A reference station statistic data processing part 5 counts a satellite circuit use frequency of each slave station, generates statistic information extending over a prescribed period, and sends the slave station number whose use frequency is high to a reference station circuit control part 4. A slave station circuit control part 12, etc., confirm whether master station and slave station numbers are contained in a reference station TDM burst or not, and when the master station transmits circuit control information of a frequency allocation request, etc., a transmission control is executed so that it is positioned in the burst of the reference station TDM burst containing the master station and slave station numbers. The slave station in which the master station and slave station numbers are not contained in any reference station TDM burst transmits circuit control information of the master station to a random access burst position.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a satellite communication system consisting of a reference station and a plurality of slave stations.
This invention relates to a satellite communication control method for canceling.

[Conventional technology]

Conventionally, in this type of satellite line frequency allocation/cancellation, frequency allocation request data by slave stations is transmitted randomly, or the transmission timing of each slave station is determined in advance.

[Problem to be solved by the invention]

The conventional satellite line frequency allocation/cancellation described above uses a method in which slave stations randomly transmit frequency allocation request data, resulting in low throughput, and a method in which the transmission timing of each slave station is determined in advance. So,
Although it increased throughput compared to the random method, it had the disadvantage of not increasing the efficiency of satellite line usage.

[Means to solve the problem]

The satellite communication control method of the present invention is characterized by the frequency allocation and
In satellite communication, which consists of a reference station that manages cancellation and the operational status of the entire system, and a plurality of slave stations that receive frequency assignment and perform actual communication, the reference station collects statistics on the usage frequency of the satellite line of each of the slave stations, and It has a statistical data processing unit that allocates frequency allocation request data transmission slots to frequently used slave stations.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a system configuration diagram of an embodiment of the present invention, and FIGS. 2 to 4 are explanatory diagrams showing the timing on the satellite of the line control information transmitted by the reference station and slave station.

In Figure 1, 1 is a communication satellite, 2 is a reference station antenna section,
3 is a reference station radio section, 4 is a reference station line control section, 5 is a statistical data processing section, 6 is an emergency operation section, 7 is a line control line, 1
0.20 to NO are slave station antenna sections, 11.21 to N1 are slave station radio sections, 12, 22 to N2 are slave station line control sections, 13.
23 to N3 are slave station terminal units, 100 is a reference station TDM burst, 101 is a slave station random access burst, 110 to
112 is a reference station TDM burst containing reservation allocation information, 1
20 to 122 are slave station reservation bursts, 210 to 212 are reference station TDM bursts including emergency reservation allocation information, 220
.about.222 is an emergency subordinate station reservation burst.

In this system, the reference station and slave stations use the same satellite line.

Immediately after the start of operation of this system, since there is little statistical data on the frequency of use of satellite lines by each slave station, each slave station performs line control using a random access method, as shown in FIG. In this first step, the base station statistical data processing unit 5 counts the satellite line usage frequency of each slave station, creates statistical information over a certain period, and assigns frequently used slave station numbers to the base station line control unit 5.
send to The reference station line control unit 4 transmits reservation assignment information including the slave station number in the format shown in FIG. The slave station line control unit 12 and the like check whether the base station slave station number is included in the base station TDM burst, and when the base station transmits line control information such as a frequency allocation request, the slave station TDM burst that includes the base station slave station number is Transmission control is performed so that the position is in the next burst. A slave station whose slave station number is not included in any of the reference station TDM bursts transmits its own line control information to the random access burst position.

During the operation of this system, if it becomes necessary for an emergency operation to allocate a line preferentially to a specific slave station, burst transmission in the format shown in FIG. 4 will be used. That is, the base station line control unit 4 transmits the slave station number inputted from the base station operation unit 6 as the base station TDM bursts 21'O to 212. The slave station whose own station slave station number is designated in the reference station TDM burst transmits its own station burst to the positions of the emergency slave station reserved bursts 220 to 222.

In this way, by collecting statistics on the satellite line usage frequency of each slave station and preferentially allocating frequency allocation request data transmission slots to frequently used slave stations, throughput is improved, while random access slots are allocated to other slave stations. In addition to allocating , the line usage efficiency of the entire system can be improved.

〔Effect of the invention〕

As explained above, the present invention improves throughput by collecting statistics on the satellite line usage frequency of each slave station and preferentially allocating frequency allocation request data transmission slots to frequently used slave stations. In combination with allocating random access slots to slave stations, this has the effect of improving the line usage efficiency of the entire system.

[Brief explanation of drawings]

Figure 1 is a system configuration diagram of an embodiment of the present invention, Figures 2-
FIG. 4 is an explanatory diagram showing the timing on the satellite of the line control information transmitted by the reference station and the slave station. 1... Communication satellite, 2... Reference station antenna section, 3...
Reference station radio section, 4... Reference station line control section, 5... Statistical data processing section, 6... Emergency operation section, 7... Line control line, 10.20~No.... Slave station antenna section , 11
゜21~N1...Slave station radio section, 12.22~N2...
・Slave station line control unit, 13.23 to N3...Slave station terminal unit, 100...Base station TDM burst, 101...Slave station undam access burst, 110 to 112...Base station TDM burst including reservation allocation information , 120-12
2...Slave station reservation burst, 210-212...Reference station TDM burst including emergency reservation allocation information, 220-
222...Emergency subordinate station reservation burst.

Claims (1)

[Claims] In satellite communication, which consists of a reference station that manages the allocation and release of frequencies to be used and the operational status of the entire system, and multiple slave stations that receive frequency assignment and perform actual communication, the reference station determines the frequency of use of the satellite line of each slave station. 1. A satellite communication control system, comprising: a statistical data processing unit that calculates statistics of the frequency allocation request data transmission slot to the frequently used slave station.