Method for combining with power controlling based on HARQ of IEEE802.16e

Abstract

The invention relates to a method for combining HARQ with power control based on IEEE802.16e. By introducing the parameter of 'the proportion of repeat request users', the method realizes the compromise of power and delay in a multi-carrier system, by fully utilizing the repeat request combination gain of an HARQ mechanism during the power control process, the method effectively reduces the total transmission power and meets the certain requirements of signal to interference and noise ratio and delay and respectively provides simple and easy combination strategies aiming at two sub-channel dividing mechanisms in a protocol. As for a non-real-time system, if the objective frame error rate and the total transmission power restriction of each user are given, the strategy can meet the frame error rate and the power restriction required by the system by the selection of a proper repeat request user proportion and at the cost of certain delay; or when the objective frame error rate and the tolerable maximum delay of the system of each user are given, the strategy can select the corresponding repeat request user proportion to realize the minimum total transmission power.

Description

technical field [0001] The invention relates to the field of digital broadband mobile wireless communication, in particular to a method combining HARQ and power control based on IEEE802.16e. Background technique [0002] Power control is a radio resource management technology. From the service point of view, it minimizes the total transmission power on the premise of meeting the service quality requirements. Power control is very important for the efficiency of WIMAX system. The power level must be effectively managed to ensure stable communication and reduce potential interference, especially in non-line-of-sight (NLOS, Non Line OfSight) transmission. Power control is to achieve link optimization important functions. NLOS means that the antenna can be located in or on the customer's set-top box, without having to install and locate an outdoor antenna, and its wireless channel environment is therefore much more complicated than that of line-of-sight (LOS, Line Of Sight) tra...

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Problems solved by technology

However, this is only applicable to CDMA systems, and is limited to the case of a single user. When there are multiple users, the decrement mode will use the HARQ mechanism for all users, without further research on the balance of power and delay.

In addition, a large number of literatures study the power allocation problem in the system, all of which aim at maximizing the system capacity, and do not consider the role of HARQ. At present, there is no literature that jointly considers power control and power control in the system, but as two Mutually independent technologies, the power control process does not use the retransmission and codeword combination gain brought by HARQ, which will inevitably result in waste of power

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