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为了能够更加高效地使用无线资源,提出了一种跨层资源分配方案。该方案由调度过程和子载波与功率分配过程两部分组成。在调度过程中,引入了考虑QoS要求的“等效带宽”,以用户的等效带宽和信道增益为依据进行调度;在子载波与功率分配过程中,是以用户在调度后的数据速率和信道增益为依据进行分配。仿真结果表明,这种分配方案能够有效地降低系统的发射功率。
In order to be able to use wireless resources more efficiently, a cross-layer resource allocation scheme is proposed. The scheme consists of two parts: the scheduling process and the subcarrier and power allocation process. In the scheduling process, the “equivalent bandwidth” considering the QoS requirements is introduced to schedule based on the user’s equivalent bandwidth and channel gain. In the process of subcarrier and power allocation, the data rate after the user is scheduled and Channel gain is based on the allocation. Simulation results show that this allocation scheme can effectively reduce the transmission power of the system.