Threshold priority policy for channel assignment in cellular networks

Numerical Approach to Performance Analysis of Multi-Parametric CAC in Multi-Service Wireless Networks

“…Note that in special case r o =0 the proposed CAC coincides with the one investigated in [9]. It is evident from derived formulas that in case approximate calculation of QoS metrics we www.intechopen.com Numerical Approach to Performance Analysis of Multi-Parametric CAC in Multi-Service Wireless Networks 185 don't have to generate the entire state space of the initial model and calculate its stationary distribution in order to calculate the QoS metrics of the CAC based on individual pools for heterogeneous calls.…”

“…In such networks real time voice calls (v-calls) are more susceptible to possible losses and delays than non-real time data (original or handover) call (d-calls). That is why a number of different CAC strategies for prioritization of v-calls are suggested in various works, mostly implying use of guard channels (or cutoff strategy) for high priority calls [7], [8] and/or threshold strategies [9] which restrict the number of low priority calls in channels. In this paper we introduce a unified approach to approximate performance analysis of two multi-parametric CAC in a single cell of un-buffered integrated voice/data CWN which differs from known works in this area.…”

Radio resource reservation for heterogeneous traffic in cellular networks with spectrum leasing

“…Due to the gain of resource sharing [10], the two reservations can be implicitly combined into a reservation pool [11]. However, the optimal reservation in the pool is not the sum of the two optimal reservations in [7,8], which reasons are as follows. First, the optimal reservation in [8] is found in cells with fixed channels, but the cells considered herein have variable channels due to channel leasing and withdrawal, which complicates the channel reservation for inter-cell hand-off calls.…”

“…However, the optimal reservation in the pool is not the sum of the two optimal reservations in [7,8], which reasons are as follows. First, the optimal reservation in [8] is found in cells with fixed channels, but the cells considered herein have variable channels due to channel leasing and withdrawal, which complicates the channel reservation for inter-cell hand-off calls. Second, the optimal reservation in [7] is found in an environment without inter-cell hand-off call arrivals, but the cellular network herein includes the intercell hand-off arrivals, which worsens the negative effect of channel withdrawal.…”

“…From the viewpoint of mobile users, the inter-cell hand-off dropping probability should be as low as possible. To provide mobile users with low inter-cell hand-off dropping probability, threshold based channel reservation schemes have been presented in [8,9].…”