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Power control method of TD-LTE (TD-SCDMA Long Term Evolution) system

A technology of power control and transmit power, applied in the field of broadband mobile communication systems, which can solve the problems of information exchange between cells cannot be reflected in time, real-time resource scheduling interference, and inter-cell interference is not well solved, etc.

Inactive Publication Date: 2010-10-27
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem of inter-cell interference in the same-frequency networking of the TD-LTE system has not been well resolved, and the technical advantages based on the TDD duplex method (symmetry of the frequency response of the uplink and downlink channels) have not been fully reflected.
[0019] In the 3GPP standardization scheme, the inter-cell power control mainly notifies adjacent cells to adjust the configuration parameters through inter-cell overload indication. However, since inter-cell information interaction cannot timely reflect the interference caused by real-time is a passive form

Method used

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  • Power control method of TD-LTE (TD-SCDMA Long Term Evolution) system
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  • Power control method of TD-LTE (TD-SCDMA Long Term Evolution) system

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Embodiment Construction

[0034] Below with reference to accompanying drawing, the present invention is further described

[0035] The power control scheme proposed in this patent utilizes the characteristics of the reciprocity of the uplink and downlink channel responses of the TD-LTE system, and through the downlink measurement of the current cell and the adjacent cell by the user terminal, it describes the impact that will be generated on the adjacent cell after the resource scheduling of the serving cell. Interference situation, and adjust the transmit power of the user according to the interference situation.

[0036] Program realization

[0037] The implementation of the new solution can be divided into three stages: user terminal downlink measurement, non-serving cell uplink interference prediction and comparison with the interference setting threshold, user terminal power adjustment according to whether the interference to the non-serving cell exceeds the threshold, and the solution The impl...

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Abstract

The invention relates to a power control method of a TD-LTE system. In the method, a user forecasts the up interference of an adjacent base station on a corresponding cell by estimating the down channel of the adjacent base station by utilizing the channel reciprocity of the uplink and the downlink of the TD-LTE system; on the basis of interference forecast, the user can actively regulate transmitting power per se so as to reduce the interference to an adjacent cell. The invention does not need to change the current power control flow and signalling, has good compatibility, can effectively reduce intracell interference level and improves the cell edge user throughput and system throughput.

Description

technical field [0001] The present invention relates to a broadband mobile communication system, in particular to a TD-LTE (TD-SCDMA Long Term Evolution, referring to the long-term evolution of TD-SCDMA) system power control method. Background technique [0002] OFDM / OFDMA (Orthogonal Frequency Division Multiplexing / Orthogonal Frequency Division Multiple Access) is the core transmission technology of the next-generation broadband mobile communication system and has higher spectral efficiency. In the 3GPP LTE standardization process, my country's leading TD-LTE (TD-SCDMA Long Term Evolution, refers to the long-term evolution of TD-SCDMA) standard is the evolution of TD-SCDMA, which will guarantee The healthy development of TD-SCDMA industry. However, the problem of inter-cell interference in the same-frequency networking of the TD-LTE system has not been well resolved, and the technical advantages based on the TDD duplex method (symmetry of the frequency response of the uplin...

Claims

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Application Information

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IPC IPC(8): H04W52/24H04W52/26
CPCY02B60/50
Inventor 王江徐景
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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