Scalable, hierarchical, all-optical WDM networks for processor interconnection in multiprocessor systems have been recently considered. The principal objective of this paper is to introduce an access protocol for this type of network which supports a distributed shared memory (DSM) environment. The objectives of the protocol are reduced averagelatency per packet, support of broadcast/multicast,...

Designing a medium access control (MAC) protocol is a key for implementing any practical wireless network. In general, a MAC protocol is responsible for coordinating users in accessing spectrum resources. Given that a user in cognitive radio(CR) networks do not have priority in accessing spectrum resources, MAC protocols have to perform dynamic spectrum access (DSA) functions, including spectru...

Simultaneous random access of massive machine type communications (MTC) devices are expected to cause congestion in the radio access network. Not only the performance of MTC, but the coexisting human to human (H2H) communications would also degrade dramatically without an appropriate medium access control (MAC) protocol. However, most existing solutions focus on the random access procedure with...

The Enhanced UMTS Radio Access Network Extensions (EURANE) provided UMTS and HSDPA support in the Network Simulator (NS-2). The main components of EURANE include the Radio Link Control (RLC) layer with the Acknowledged and Unacknowledged Modes, MAC layer for the main UMTS and HSDPA transport channels and a physical-layer simulation tool for simulating the fast channel variations in HSDPA. Altho...

Wireless mesh networks are a cost-efficient means to provide ubiquitous Internet access. Large-scale wireless mesh networks may use multiple access networks. Depending on the routing protocol, a node may not know over which of these access networks it is communicating. In this paper, we propose a routing protocol-independent method that allows nodes to (i) determine when they are switching the ...

This document describes a set of Layer 2 Tunneling Protocol (L2TP) Attribute Value Pair (AVP) extensions designed to carry the subscriber Access Line identification and characterization information that arrives at the Broadband Remote Access Server (BRAS) with L2TP Access Concentrator (LAC) functionality. It also describes a mechanism to report connection speed changes, after the initial connec...

This document defines an abstract architecture for Direct Data Placement (DDP) and Remote Direct Memory Access (RDMA) protocols to run on Internet Protocol-suite transports. This architecture does not necessarily reflect the proper way to implement such protocols, but is, rather, a descriptive tool for defining and understanding the protocols. DDP allows the efficient placement of data into buf...

In this chapter, we continue the discussion on medium access control protocols designed for wireless sensor networks. This builds upon the background material and protocols presented in Chapter 4. We first present protocols that are based on random access techniques such as Carrier Sense Multiple Access. These include the Sift protocol, the T-MAC protocol and other protocols. The second set of ...

Wireless Networking is one of the fastest growing areas in the network industry today. Wireless Local Area Networks (WLANs) are gaining special interest as they provide flexibility of location along with low infrastructural and maintenance costs. The hidden terminal problem is unique to wireless networks that decrease the performance of the network. In this paper we propose a new MAC protocol t...

Many medium access control protocols have been proposed for optical wavelength division multiplexing local area networks with a star topology. These protocols range from those based on the concept of fixed-assignment of communication subchannels, such as TDMA (Time Division Multiple Access); random-access to communication subchannels, such as DTWDMA (Dynamic Time-Wavelength Division Multiple Ac...