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Method for supporting high-speed mobility in wireless communication system

A wireless communication system and high-speed mobile technology, applied in the field of supporting high-speed mobility, can solve problems such as not being able to support high-speed mobility

Inactive Publication Date: 2012-07-18
辛美丽
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a method for supporting high-speed mobility in a wireless communication system, which solves the problem that traditional broadband wireless access systems cannot support high-speed mobility

Method used

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  • Method for supporting high-speed mobility in wireless communication system
  • Method for supporting high-speed mobility in wireless communication system
  • Method for supporting high-speed mobility in wireless communication system

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Embodiment Construction

[0020] Aiming at the channel characteristics in the high-speed mobile scene, the present invention proposes to use a longer CP configuration than in the traditional system to support the wireless communication requirements of high-speed mobile users.

[0021] The present invention will be further described in detail below with reference to the drawings and embodiments, taking a broadband cellular wireless communication system as an example.

[0022] As shown in Figure 1, it is the composition schematic diagram of OFDM symbol among the present invention, OFDM symbol comprises useful symbol 101 and cyclic prefix 102 among Fig. 1 (a), and the length of cyclic prefix 102 is 1 / 2 of useful symbol 101 length. In FIG. 1( b ), the length of the cyclic prefix 104 is 2 / 3 of the length of the useful symbol 103 . In FIG. 1( c ), the length of the cyclic prefix 106 is 3 / 4 of the length of the useful symbol 105 . Here, by setting a longer cyclic prefix, the inter-carrier interference in the...

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Abstract

The invention discloses a method for supporting high-speed mobility in a wireless communication system, comprising the following steps of arranging the circular prefixal length for the sub-frame moving at high speed and arranging the region information of the sub-frame (moving at high speed) of the uplink and downlink at the base station; wherein the region information is used for specifying the position of the sub-frame moving at high speed in the frame structure; the base station broadcast sends the region information of the sub-frame moving at high speed and the length of the circular prefix; each mobile station of the base station receives and memorizes the region information in the broadcast control message and the length of the circular prefix; the base station deploys the data of the user moving at high speed into the region information of the sub-frame moving at high speed; and the mobile station moving at high speed sends or receives the data in the sub-frame (moving at high speed) of the uplink and downlink through the arranged length of the circular prefix. The method arranges longer circular prefix in the region of the sub-frame moving at high speed and greatly reducesthe effects of the carrier wave interference at low complexity.

Description

technical field [0001] The invention relates to a mobile communication technology, in particular to a method for supporting high-speed mobility in a wireless communication system. Background technique [0002] Next-generation broadband mobile communication systems such as Mobile WiMAX (Worldwide Interoperability for Microwave Access, UMB (Ultra Mobile Broadband, Ultra Mobile Broadband) and LTE (3GPP Long Term Evolution, 3GPP Long Term Evolution) all use OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access) multiple access mode. OFDM (Orthogonal Frequency Division Multiple, Orthogonal Frequency Division Multiplexing) symbols include useful symbols and CP (Cyclic Prefix). The cyclic prefix copies the latter part of the useful symbol to the front of the symbol as a guard interval to overcome inter-carrier interference. The interference between carriers is mainly due to the influence of multipath propagation. In the case of high-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/02H04L1/00H04L12/28
Inventor 方惠英
Owner 辛美丽
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