Interference-based channel assignment for DS-CDMA cellular systems

Shin, Seung Heon; Cho, Cheol-Hye; Sung, Dan Keun

doi:10.1109/25.740098

Cited by 91 publications

(53 citation statements)

References 14 publications

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“…If cell has a PCF , its mobiles' signal powers have increased by a factor of . Thus, the new relative average intercell interference of cell to cell becomes (10) As a result, the new intercell interference factor per user becomes . Thus, once the original intercell interference factors have been calculated (for PCFs equal to one), changing the PCFs for the cells does not require recalculation of the original since is linear in .…”

Section: Sensitivity Analysismentioning

confidence: 99%

Multicell CDMA network design

Akl

Hegde

Naraghi-Pour

et al. 2001

IEEE Trans. Veh. Technol.

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Abstract-Traditional design rules for cellular networks are not directly applicable to code division multiple access (CDMA) networks where intercell interference is not mitigated by cell placement and careful frequency planning. For transmission quality requirements, a minimum signal-to-interference ratio (SIR) must be achieved. The base-station location, its pilot-signal power (which determines the size of the cell), and the transmission power of the mobiles all affect the received SIR. In addition, because of the need for power control in CDMA networks, large cells can cause a lot of interference to adjacent small cells, posing another constraint to design. In order to maximize the network capacity associated with a design, we develop a methodology to calculate the sensitivity of capacity to base-station location, pilot-signal power, and transmission power of each mobile. To alleviate the problem caused by different cell sizes, we introduce the power compensation factor, by which the nominal power of the mobiles in every cell is adjusted. We then use the calculated sensitivities in an iterative algorithm to determine the optimal locations of the base stations, pilot-signal powers, and power compensation factors in order to maximize capacity. We show examples of how networks using these design techniques provide higher capacity than those designed using traditional techniques.

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Section: Sensitivity Analysismentioning

confidence: 99%

Multicell CDMA network design

Akl

Hegde

Naraghi-Pour

et al. 2001

IEEE Trans. Veh. Technol.

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“…In [6], [7], an adaptive channel assignment scheme was proposed, based on interference measurements rather than SIR measurements. The algorithm was evaluated for a fixed number of users in neighboring cells, while the impact of a new call on ongoing calls in adjacent cells was not considered.…”

Section: Review Of Cac Schemesmentioning

confidence: 99%

“…In this type of systems, the network capacity is limited by the uplink since the transmission onto this is asynchronous [4], [5], [6], [7]. Thus, in this work we restrict ourselves to CAC for the uplink of HAP W-CDMA systems, which is common practice for CDMA systems [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16]. The aim of CAC is to decide whether to accept or reject a new call.…”

Section: Introductionmentioning

confidence: 99%

Call admission control in multiservice high altitude platform (HAP) W-CDMA cellular systems

Karapantazis

Pavlidou

2007

Computer Networks

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“…A CAC scheme for homogeneous services is proposed in [15], where the admission decisions are determined by the interference level. An SIR-based CAC scheme is proposed in [16] for homogeneous services.…”

Section: Introductionmentioning

confidence: 99%

Radio resource management for cellular cdma systems supporting heterogeneous services

Zhao

Shen

Mark

2003

IEEE Trans. on Mobile Comput.

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Abstract-A novel radio resource management (RRM) scheme for the support of packet-switched transmission in cellular CDMA systems is proposed by jointly considering the physical, link, and network layer characteristics. The proposed resource management scheme is comprised of a combination of power distribution, rate allocation, service scheduling, and connection admission control. Power distribution allows individual connections to achieve their required signal-to-interference-plus-noise ratio, while rate allocation guarantees the required delay/jitter for real-time traffic and the minimum transmission rate requirement for non-real-time traffic. Efficient rate allocation is achieved by making use of the randomness and burstiness of the packet generation process. At the link layer, a packet scheduling scheme is developed based on information derived from power distribution and rate allocation to achieve quality of service (QoS) guarantee. Packet scheduling efficiently utilizes the system resources in every time slot and improves the packet throughput for non-real-time traffic. At the network layer, a connection admission control (CAC) scheme based on the lower layer resource allocation information is proposed. The CAC scheme makes use of user mobility information to reduce handoff connection dropping probability (HCDP). Theoretical analysis of the grade of service performance, in terms of new connection blocking probability, HCDP, and resource utilization, is given. Numerical results show that the proposed RRM scheme can achieve both effective QoS guarantee and efficient resource utilization.

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Interference-based channel assignment for DS-CDMA cellular systems

Cited by 91 publications

References 14 publications

Multicell CDMA network design

Multicell CDMA network design

Call admission control in multiservice high altitude platform (HAP) W-CDMA cellular systems

Radio resource management for cellular cdma systems supporting heterogeneous services

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