Dynamic capacity allocation for multimedia services in TDMA/CDMA cellular networks

2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications

2006

Outage probability has been commonly used as the primal metric to investigate system capacity of cellular networks. Outage probability is a system-level metric that lacks key information with regards to outage performance within the lifetime of a particular session. Analysis based on the satisfieduser criteria has been recently recommended by universal mobile telecommunication systems (UMTS) where the outage percentage for each individual session is computed for a more genuine estimate of system capacity. In this paper, the session outage performance is modeled as an alternating renewal process with exponential holding times (ARP/E). Estimation of satisfied-user probability resolves to derivation of the total downtime (bad-time) percentage of an ARP/E. An exact formula for the satisfied-user probability is derived for speech services. The ARP/E analysis developed for speech is also employed as an approximation for the satisfied-user probability of WWW browsing users.

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Section: B Www Browsing Servicementioning

confidence: 99%

“…An exact formula for the satisfieduser probability is derived for speech services. For WWW browsing, the error-free download time follows a Weibull distribution [11]. The ARP/E analysis developed for speech is employed as an approximation for the corresponding satisfied-user probability of WWW browsing users.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Percentage of Outage for Multimedia Services in Cellular Networks

2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications

2006

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“…This is superior in terms of signaling cost and reliability to other adaptive schemes that rely on the receiver reporting its BER state or asking for a resource re-assignment when packet loss occurs [11,12]. To address the limitations of the distributed MIP, we propose the minimum sum of path-loss ratios (MS-PLR) algorithm [18]. The scheme functions in a distributed processing structure with global interference information.…”

Section: Introductionmentioning

confidence: 99%

Radio resource management for downlink multimedia services in TDMA/CDMA interference-limited cellular networks

2007

Wireless Pers Commun

This paper addresses the radio resource management (RRM) structure and efficient dynamic capacity allocation techniques for hybrid TDMA/ CDMA mobile cellular networks to support downlink multimedia services with different quality-of-service (QoS) requirements in an interference-limited environment. Various burst-driven timeslot-code assignment algorithms suitable for distributed processing are proposed to achieve high system capacity in terms of b/s/ Hz/cell while maintaining a required percentage of satisfied users. Simulation results for various traffic scenarios are used for performance evaluation and comparison. The impacts of bursty WWW traffic on speech performance are also examined. It is shown that interference information can be used in timeslot-code assignment to significantly improve the system performance. Based on the received interference information, the minimum instantaneous power (MIP) algorithm aims to assign timeslot-codes that minimize the required transmitted power to maintain a target SINR. The MIP can provide an increase of 23% in system capacity. By considering to reduce both potentially received and ge-

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WWW browsing performance within a mixed speech environment of future cellular networks

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.

2005