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Switching method of multi-carrier OFDM systems

A multi-carrier, wireless technology, applied in the direction of wireless communication, electrical components, etc., can solve the problem of difficult 100bps/Hz transmission spectrum efficiency, etc., to achieve good throughput and reduce the effect of impact

Active Publication Date: 2014-04-16
MEDIATEK INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current transmission technology is difficult to effectively achieve the transmission spectrum efficiency of 100bps / Hz

Method used

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  • Switching method of multi-carrier OFDM systems
  • Switching method of multi-carrier OFDM systems
  • Switching method of multi-carrier OFDM systems

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0032] The following is a detailed description of the embodiments of the present invention according to several figures.

[0033] figure 2A schematic diagram of carrier pre-assignment for multi-carrier handover in a wireless multi-carrier OFDM network 20 according to one novel aspect. The multi-carrier OFDM network 20 includes a serving base station SBS 21 , a target base station TBS 22 and a mobile station MS 23 . The mobile station MS23 is connected to the serving base station SBS21 via a primary carrier and one or more secondary carriers. When the mobile station MS23 moves away from the serving base station SBS21, the signal quality of the connection starts to degrade. Then the serving base station SBS21 or the mobile station MS23 starts the multi-carrier handover operation, so that the mobile station MS23 is handed over to the target base station TBS22. In a novel aspect, serving base station SBS21 determines (or upon request by mobile station MS23) that mobile station...

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Abstract

Carrier pre-assignment is applied in multi-carrier handover operation to mitigate the impact to the user experience during handover and to achieve various objectives of call admission control in wireless multi-carrier OFDM networks. With carrier pre-assignment, a mobile station communicates its multi-carrier information to a target base station. The target base station pre-assigns secondary carriers to fulfill the requirements of the mobile station. In a first embodiment, a break-before-entry (BBE) multi-carrier handover procedure with carrier pre-assignment is provided. In a second embodiment, an entry-before-break (EBB) multi-carrier handover procedures for both inter-FA and intra-FA with carrier pre-assignment are provided. The multi-carrier handover procedures with carrier pre-assignment may be applied to 2-to-2 or N-to-N carriers handover situation. Because target secondary carriers are pre-assigned before handoff, the mobile station is ready for data transmission over multiple carriers after handover without additional carrier assignment procedure.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under Section 119 of the U.S. Patent Act to U.S. Provisional Patent Application No. 61 / 172,344, filed April 24, 2009, entitled "Capability Negotiation Method Supporting Priority Carrier Designation in an OFDM Multi-Carrier System" rights, this patent application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to wireless network communications, and more particularly to handover operations in multi-carrier wireless systems. Background technique [0004] In current wireless communication systems, a radio bandwidth of 5MHz-20MHz is usually used to achieve a peak transmission rate of 100Mbps. However, higher peak transmission rates are required in next-generation wireless systems. For example, ITU-R requires a peak transmission rate of 1 Gbps for advanced IMT systems, such as the fourth generation mobile communication system (ie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00
CPCH04W36/0072
Inventor 卢晓珍汤智翔林圣崴廖婉君傅宜康周照钦
Owner MEDIATEK INC