Handover and new call admission policy optimization for G3G systems
Wireless Networks
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
Code Placement and Replacement Strategies for Wideband CDMA OVSF Code Tree Management
IEEE Transactions on Mobile Computing
Handoff with Dynamic Guard Channels in ATM-Based Mobile Networks
ICOIN '98 Proceedings of the 13th International Conference on Information Networking
Multi-level dynamic guard channels for priority access in cellular systems
NETWORKING'05 Proceedings of the 4th IFIP-TC6 international conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication Systems
IEEE Transactions on Wireless Communications
Dynamic assignment of orthogonal variable-spreading-factor codes in W-CDMA
IEEE Journal on Selected Areas in Communications
Reducing CQI signalling overhead in HSPA
Research Letters in Communications - Regular issue
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In this paper, we propose a prioritization of handover (HO) calls over new calls in WCDMA systems employing orthogonal variable spreading factor (OVSF) codes as channelization codes. The code occupancy of the system is modeled by a Markov chain and the differentiation between HO and new call is performed at the code level by introducing a "guard code" scheme. The scheme belongs to the well known family of guard channel schemes and reserves some code capacity to favor the continuation of HO calls over the new calls. As the management of the general case is intractable, we solve certain numerical instances of the problem and manage to calculate several popular performance metrics like new call blocking and HO failure probabilities and code utilization.