HP Labs Technical Reports

Dynamic Reconfiguration & Efficient Resource Allocation for Indoor Broadband Wireless Networks

Farnham, Tim; Foxon, Brian

HPL-98-123

Keyword(s): broadband; medium access control; self organisation

Abstract: A combined Frequency and Time Division Multiple Access (FDMA/TDMA) mechanism for implementing an indoor broadband radio access system at 5GHz is described in [1] and [2]. The main feature of this approach is that real-time co-ordinated prioritised time slot assignments are performed in clusters of Access Points (AP's), which share the same carrier frequency. Re-use partitioning is performed in time by simultaneously assigning time slots within a cluster of AP's based on the expected level of interference and in frequency by allowing the carriers to be re-used by clusters of AP's that are sufficiently isolated. The AP cluster configuration is important for efficient utilisation of the scarce radio resources. If the clusters remain fixed then the system can support uneven load distributions within each cluster, but is not able to adapt to supporting load distributions which are unevenly distributed between clusters or to interference from other systems. In this paper a method of dynamically reconfiguring the clusters to support changes in the geographic load distribution over time and external interference is investigated. The performance in the presence of small scale signal fading is obtained and compared.

5 Pages

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