多业务环境下切换优先算法的改进

切换是移动通信中充分利用有限频谱的一项关键技术。本文提出了在数据业务和话音业务环境下,基于混合信道分配(HCA)方案上的双先进先出(FIFO)排队算法:系统分别为切换语音呼叫和初始语音呼叫与数据呼叫分配了大小为Nh和No的排队空间,两队列均遵从FIFO法则;同时,为切换语音呼叫预留了可根据当前业务量调整数目的Cr个信道。通过与单FIFO排队算法和基于HCA的单FIFO排队算法的比较,可以看到本算法改善了系统的性能,更能适应高业务量小区的需要。

Improvement in the priority handoff scheme for multi-service cellular mobile communication systems

Service handoff is the key technique in achieving more efficient use of the finite spectrums allocated to the mobile communication system. In this paper, it is introduced a new handoff scheme, the dual-queue FIFO algorithm based on HCA (Hybrid Channel Assignment) for data and voice call services. Queue lengths Nh and No are assigned respectively to handoff voice calls and initial voice calls and data calls, both queues following the FIFO discipline. At the same time, the adaptive number of Cr channels are reserved for handoff voice calls. It can be seen through comparison with the single FIFO queuing scheme and the HCA-based single FIFO queuing scheme that the service handoff priority scheme improves the system performance and better suits the needs of intense communication.