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Method and system for uplink power control in time division duplex feedback enhanced system

A system enhancement, time division duplex technology, applied in duplex signal operation, transmission control/equalization, error prevention/detection using return channel, etc., can solve the problem that power control, scheduling and other performance cannot adapt to rapid changes in channel and interference , The power control period cannot be less than a frame period, and the system throughput and dynamic performance are limited, so as to improve the throughput and dynamic performance, suppress the interference of adjacent cells, and improve the uplink capacity.

Inactive Publication Date: 2008-07-02
ZTE CORP
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Problems solved by technology

[0006] The transmission of the existing power control feedback signal is limited by the wireless frame structure of the TDD system, and the power control period cannot be less than one frame period, making power control, scheduling and other performance unable to adapt to the rapid changes in channel and interference, which limits the system throughput and dynamic performance further improvement of

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  • Method and system for uplink power control in time division duplex feedback enhanced system

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[0038] The implementation process of the present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

[0039] The TDD feedback enhancement system involved in the present invention includes at least one base station and at least one terminal. In addition to sending uplink signals on the basic working frequency spectrum of the TDD system (that is, the unpaired frequency spectrum used in both directions), the TDD feedback enhancement system also receives feedback signals from the base station from another frequency spectrum in a time-division manner. That is, on the basis of using the two-way spectrum, part of the spectrum used for downlink transmission (herein referred to as downlink unidirectional spectrum) is used. The base station uses the two-way frequency spectrum to realize data transmission and reception in a time-division manner and realizes the transmission of feedback signals in the one-way frequency spectrum. ...

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Abstract

The invention discloses a method and a system thereof for realizing uplink power control in a feedback enhancement system of time division duplex, which applies a bidirectional spectrum and comprises the following processes: a base station alternatively distributes uplink time slots in a wireless frame of the bidirectional spectrum to different terminals or different terminal groups; each terminal or each terminal group obtains the uplink time slots with the same interval; the base station chooses a unidirectional spectrum of a downlink to transfer a feedback signal of power control to the terminals; a wireless frame on the unidirectional spectrum and that on the bidirectional spectrum keep synchronous; the terminals transfer uplink signals within the distributed uplink time slots to the base station; the base station finishes parameter estimation within a specific delay and transfers a feedback signal of power control to the terminals by adopting the unidirectional spectrum; the terminals receive the feedback signal of power control on the unidirectional spectrum and regulate power control of terminals, thus preparing for transferring the uplink signals within downlink-uplink time slots distributed for the terminals within the same wireless frame. The invention realizes sending down the feedback signal of power control with high frequency of which the period is shorter than the length of the frame; besides, the feedback delay is small, and the system throughput is increased.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and system for realizing uplink power control in a TDD feedback enhancement system. Background technique [0002] Existing TDD systems use unpaired spectrum 101 for uplink and downlink two-way communication in a time-division manner. FIG. The spectrum 101 of the row is a bidirectional spectrum. In this non-paired frequency spectrum 101, the public broadcasting signal, control signal, and service signal of the system all work alternately with a radio frame as a cycle. The baseband and channel resources of the TDD system are designed to support uplink and downlink at each frequency point. [0003] The period of the wireless frame is generally 10ms or 5ms. The period of the wireless frame is further subdivided into two types of uplink and downlink time slots. The uplink time slots include synchronization time slots and business time slots, while the downlink time slo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04L1/18H04L5/14
Inventor 刁心玺
Owner ZTE CORP
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