Resource allocation method for energy harvesting cooperative network based on information and energy transmission

Abstract

The invention belongs to the technical field of cooperative transmission, and discloses an energy collection network resource allocation method based on information and energy simultaneous transmission technology, which acquires channel state information on each subcarrier in a transmission time slot; calculates each subcarrier according to a resource allocation algorithm Optimal power allocation and determination of subcarrier allocation, incremental strategy, and optimal power split ratio; during useful data transmission, the source broadcasts data on each subcarrier with the calculated power in the first time slot, and the relay and destination When the relay forwarding strategy is adopted, part of the source sending power is used for the information transmission of this time slot, and the other part is collected by the relay for the information transmission of the next time slot, and the incremental strategy determines the transmission of the second time slot Strategy, that is, the relay forwards information to the destination with the calculated power, or the source sends new data to the destination with the calculated power. The invention improves the system capacity and frequency spectrum utilization rate while meeting the minimum requirement of each user's rate.

Description

technical field [0001] The invention belongs to the technical field of cooperative transmission, and in particular relates to an energy collection cooperative network resource allocation method based on simultaneous information and energy transmission (SWIPT) technology. Background technique [0002] At present, in the wireless transmission network that introduces SWIPT technology, the resource allocation scheme in the cooperative transmission mode has considered the power allocation and power division ratio (PS) on the multi-carrier in the single-user system, or the power allocation on the multi-carrier in the single-user system. Power allocation and time division ratio (TS), or multi-user systems in non-cooperative mode jointly consider power allocation, power division ratio and subcarrier allocation to achieve system energy efficiency or system capacity maximization, and the transmission technology scheme generally adopts PS protocol, TS protocol. In addition, most of th...

AI Technical Summary

Problems solved by technology

[0003] However, there are some problems in the existing technical solutions: there is a large gap between the establishment of a single-user model and the actual application, so it is necessary to consider a multi-user transmission system; a simple multi-user non-cooperative mode transmission system cannot effectively play multiple roles. The advantages of input multiple output (MIMO) technology, gain diversity and multiplexing gain; although some cooperative transmission considers the multi-user model, maximizes the user and rate, and obtains the optimal power division ratio and optimal power allocation, but The minimum rate constraint of each user is not considered, which makes the fairness between users cannot be guaranteed, resulting in users with good channel conditions getting higher transmission rates, and users with poor channel conditions may not be served

With the traditional forwarding protocol, due to the half-duplex characteristics of the relay, although the system performance is improved, the spectral efficiency will be halved

Images