Priority Level Configuration for Signaling Service Class

Signaling service class configuration is essential for efficiency of standardized Next Generation Network (NGN) approaches for Quality of Service (QoS) control. Signaling service class should be configured to assure the target values for IP Packet Transfer Delay (IPTD) and IP Packet Loss Ratio (IPLR) as defined in International Telecommunication Union - Telecommunication Sector (ITU-T) Recommendation Y.1541: the upper bound on IPTD below 100 ms and the upper bound on IPLR below 1×10^-3. Although there are several approaches to configuring the Signaling service class, none is sufficient to completely address the issues of assuring target values regardless of the network conditions. Therefore, a novel approach was proposed in our previous work. The novel approach is based on using priority queuing system to give the Signaling service class absolute preferential treatment over all other User service classes. This paper elaborates the novel approach and confirms our previous research findings. The paper presents a continuation of our previous work, providing results that further highlight the identified issues and difference between approaches to priority level configuration for Signaling service class. Summarizing our research results, several issues are identified for future work.