Voice transport, capacity and signaling improvements for integrated wireless personal communications over metropolitan area networks

Christopher M. Cobbold
Networks for Personal Communication Services (PCS) are currently being deployed in various parts of the world. A wide range of wireless voice and data service offerings is promised, and consumer participation is expected to be high. The IEEE 802.6 Metropolitan Area Network (MAN) has previously been proposed to provide for the distributed control of such networks. This work continues investigations in call transport on the MAN using pre-arbitrated (PA) bandwidth, and for signaling using queue
more » ... itrated (QA) bandwidth. A scheme for the transport of low bit-rate encoded voice, which is characteristic of mobile voice coders, is proposed that attempts to balance packetization delay with network complexity. Capacity gains are realized with PA access by locating a gateway, which provides interconnection to the Public Switched Telephone Network (PSTN), at the Head of Bus (HOB) in a closed-bus MAN. A two-dimensional Markov Chain and resulting blocking probabilities are derived which result in the determination of the Erlang and subscriber capacity of a Personal Communications Network (PCN) based on a single MAN. This provides the basis for extracting reductions in signaling delays on the MAN by applying the Preemptive Priority Mechanism (PPM), a recently proposed improvement to the MAN media access control protocol. In summary, improvements to the PA and QA transport mechanisms, as applied to PCNs, are developed and assessed. Architectures of single and multiple MAN-based PCNs are presented in the context of the Intelligent Network (IN). The IEEE 802.6 MAN is viewed as being an evolutionary step towards the introduction of the Broadband Integrated Services Digital Network (B-ISDN). Issues arising from the migration of such architectures towards Asynchronous Transfer Mode (ATM) networks are considered in depth.
doi:10.14288/1.0065115 fatcat:ii2dub5ykzdehkddec4rhmdbhi