Dynamic k step user position updating method facing low earth orbit satellite system

A low-orbit satellite and update method technology, applied in the field of satellite communications, can solve the problems of large location management overhead, reduce location management overhead, and low QoS, and achieve the effects of improving user QoS and optimizing overhead.

Active Publication Date: 2017-05-24
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Aiming at the disadvantages of the existing LEO satellite system, such as high cost of location management, low overall QoS of users when multiple types of users exist at the same time, a dynamic k-step user location update strategy for LEO satellite systems is proposed. According

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  • Dynamic k step user position updating method facing low earth orbit satellite system
  • Dynamic k step user position updating method facing low earth orbit satellite system
  • Dynamic k step user position updating method facing low earth orbit satellite system

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Embodiment Construction

[0028] The present invention is described in further detail now in conjunction with accompanying drawing.

[0029] About location area selection:

[0030] For the division of LEO satellite location areas, it is mainly divided into static location areas and dynamic location areas. The static location area selection mainly includes four methods: division by user's geographical location, division by satellite coverage area, division by gateway station coverage area, and division by combination of gateway station and satellite coverage area. Dynamic location area division mainly includes location area division based on movement, location area division based on time, location area division based on the combination of movement and time, and location area division based on distance.

[0031] The present invention is mainly aimed at optimizing the location update strategy in the location management of the low-orbit satellite system. Since the dynamic location area requires the user t...

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Abstract

The invention discloses a dynamic k step user position updating method facing a low earth orbit satellite system. A user terminal is turned on for registration operation, and is used for registration in a VLR of a gateway station, to which a current position area belongs. The VLR is used to allocate a temporary user identity number to a user randomly, and an identity identification number of a satellite is determined, and an identity identification number of a satellite wave beam is determined, until the current VLR is used to transmit the information of the user registration to a home location register. The home location register is used for the registration of the user initial information after the receiving of the information, and the user identity number UID and the visitor location register identity number VID of the user are written. The dynamic k step user position updating method is advantageous in that problems of low earth orbit satellite systems such as complicated management and large position updating costs are solved; and at the same time, the value of K is changed dynamically by aiming at the users having different priorities according to the speeds of the different users and characteristics like frequent handover, and therefore the position updating costs are further optimized, the QoS requirements of the different users are considered, and the total QoS is improved.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and relates to a dynamic k-step user position updating method applied to a low-orbit satellite system. Background technique [0002] Compared with the medium-orbit satellite system, the low-orbit satellite system has its own advantages: small transmission delay, low transmission loss, more comprehensive coverage, etc. However, due to the fast running speed of the satellites in the low-orbit satellite system, the user's visibility time is short, and the user is also moving, which makes the location management very complicated and the overhead of location management increases. On the other hand, due to the increase in the types of users of the LEO satellite system, the requirements of various users are different, and the traditional single location management strategy has been unable to meet the QoS (Quality of Service, Quality of Service) of various users. Therefore, how to reduce...

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Application Information

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IPC IPC(8): H04W8/02H04W8/16H04W24/02
CPCH04W8/02H04W8/16H04W24/02
Inventor 孙力娟朱琦周剑韩崇王娟郭剑肖甫王汝传
Owner NANJING UNIV OF POSTS & TELECOMM
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