Get Access Networks: 4th International Conference, AccessNets PDF

By Xiao Jun Hei, Lawrence Cheung

ISBN-10: 3642116639

ISBN-13: 9783642116636

This publication constitutes the completely refereed post-conference lawsuits of the Fourth foreign convention on entry Networks, AccessNets 2009, held in Hong Kong, China, in November 2009. The eleven revised complete papers offered including eight invited papers have been conscientiously reviewed and chosen. The papers current unique and basic study advances within the zone of entry networks, reminiscent of hybrid dynamic bandwidth and wavelength allocation set of rules, assorted purposes in EPON, unsolicited supply companies (UGS), cellular WiMAX community, FiWi networks, built-in PON-WiMAX networks, cognitive radio networks, effective and dynamic spectrum sharing, cross-layer routing procedure for SCTP, and vectored DSL.

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Extra resources for Access Networks: 4th International Conference, AccessNets 2009, Hong Kong, China, November 1-3, 2009, Revised Selected Papers (Lecture Notes of the Institute ... and Telecommunications Engineering, 37)

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Wong Exposed senders S3 and S4 in Fig. 1a are called exposed senders. Both are within their mutual carrier sensing range. Suppose S4 is transmitting. When S3 attempts to access the channel, it detects the channel busy and will defter its transmission. Although simultaneous transmissions from S3 and S4 will not interfere each other at their corresponding destinations, the protocol does not allow it. When S4 finishes its transmission, both S3 and S4 will compete for the channel in a fair manner. Thus fairness in the exposed sender case is not an issue.

MSs can dynamically join and leave the networks. For joining, in order for BS to admit a connection, the BS needs to verify if there are enough resources. 16e Mobile WiMAX Networks 43 MS may request to change its service on the fly. Therefore, the scheduler needs to be aware of the quality assurance of all currently accepted connections. In other words, there is an admission control mechanism. The BS can only admit a connection if and only if the sum of the total number of currently used resources per frame and the new demand divided by the deadline of the connection is less than the total available slots per frame for UGS.

2, SWIM algorithm is introduced. The SWIM algorithm basically can be divided into three basic steps that achieve optimal throughput while meeting the deadline, minimal delay jitter (in fact zero delay jitter), and minimal number of bursts. 16e scheduler, all allocations are integer number of slots. In this paper, the definition of resource is fixed in terms of the number of slots per uplink (or downlink) subframe. This is denoted by the variable #slots. The number of bytes corresponding to a slot depends upon the modulation and coding which can vary among users.

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Access Networks: 4th International Conference, AccessNets 2009, Hong Kong, China, November 1-3, 2009, Revised Selected Papers (Lecture Notes of the Institute ... and Telecommunications Engineering, 37) by Xiao Jun Hei, Lawrence Cheung


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