Energy acquisition cooperative network resource distribution method based on information and energy transmission

Abstract

The invention belongs to the field of cooperative transmission technology, and discloses an energy acquisition cooperative network resource distribution method based on simultaneous transmission of information and energy. The method comprises the steps of acquiring channel state information on each sub-carrier in a transmission time slot; according to a resource distribution algorithm, calculating optimal power distribution on each sub-carrier and determining sub-carrier distribution, increment strategy and optimal power splitting ratio; in a first time slot in a useful data transmission process, broadcasting data in each sub-carrier according to a calculated power, receiving by a relay and a target end; wherein a relay forwarding strategy is utilized, one part of the source transmitting power is used for information transmission of the time slot, and the other part is acquired by the relay for information transmission of a next time slot; and the increment strategy determines a transmission strategy of the second time slot, namely the relay forwards the information to a target end according to the calculated power or transmits new data to the target end according to the power which is obtained through calculation. The energy acquisition cooperative network resource distribution method improves system capacity and spectrum utilization rate on the condition that a requirement for lowest rate of each user is satisfied.

Description

technical field [0001] The invention belongs to the technical field of cooperative transmission, and in particular relates to a resource allocation method for an energy harvesting cooperative network based on the simultaneous information and energy transmission (SWIPT) technology. Background technique [0002] At present, in the wireless transmission network with the introduction of 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 multi-carrier in the single-user system. Power allocation and time division ratio (TS), or the multi-user system in non-cooperative mode jointly considers power allocation, power division ratio and subcarrier allocation to achieve system energy efficiency or maximize system capacity. The transmission technology scheme generally adopts PS protocol, TS protocol. In addition, most of the establi...

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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

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