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A dynamic k-step user location update method for low-orbit satellite systems

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

Active Publication Date: 2020-08-11
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 to user characteristics and user priority, dynamically adjust the length of the visiting location register update pointer chain, which not only reduces the total location management overhead, but also ensures the different needs of various users, and improves the overall QoS of users

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  • A dynamic k-step user location update method for low-orbit satellite systems
  • A dynamic k-step user location update method for low-orbit satellite systems
  • A dynamic k-step user location update method for low-orbit satellite systems

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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 present invention has disclosed the dynamic K -step user position update method for the low -orbit satellite system. First, the user terminal is turned on, registered operation, and registered with the VLR in the Xinguan station in the current location area.VLR randomly distributes a temporary user ID number for users to determine the satellite identity certification number, determine the identity certification number of the satellite beam, until the current VLR sends the user registered information to the attribution register.Register the user's initial information, fill in the user's identity authentication number UID, and the user's visit location register number VID.The present invention can solve the problem of complex position management of the low -orbit satellite system and a large position update overhead. At the same time, according to the speed of different users, whether it is frequent to cross the district, and other users, and for different users of the priority, the value of K is not only to dynamically change the value of K.Further optimized the overhead of the location update, and took into account the needs of Qos of different users, and improved the overall QOS.

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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Patent Type & Authority Patents(China)
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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