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Effect of Head of the Line Blocking on Session Initiation Protocol Session Establishment Delays
Camarillo, Gonzalo,Schulzrinne, Henning,Loreto, Salvatore,Hautakorpi, Jani The Korea Institute of Information and Commucation 2009 Journal of communications and networks Vol.11 No.1
We have studied the effect of head of the line blocking (HOLB) on session initiation protocol (SIP) session establishment delays. Our results are based on experiments performed in a test bed and on the public Internet. We used the stream control transmission protocol (SCTP) as a transport for SIP because SCTP can be configured to suffer or to avoid HOLB. Our experiments show that the effect of HOLB on session establishment delays generally starts to be significant starting at fairly low packet loss rates. However, there are scenarios where network conditions are good enough to make the effect of HOLB insignificant.
Scaling Network Information Services to Support HetNets and Dynamic Spectrum Access
Piri, Esa,Schulzrinne, Henning The Korea Institute of Information and Commucation 2014 Journal of communications and networks Vol.16 No.2
Wireless network information services allow end systems to discover heterogeneous networks and spectrum available for secondary use at or near their current location, helping them to cope with increasing traffic and finite spectrum resources. We propose a unified architecture that allows end systems to find nearby base stations that are using either licensed, shared or unlicensed spectrum across multiple network operators. Our study evaluates the performance and scalability of spatial databases storing base station coverage area geometries. The measurement results indicate that the current spatial databases perform well even when the number of coverage areas is very large. A single logical spatial database would likely be able to satisfy the query load for a large national cellular network. We also observe that coarse geographic divisions can significantly improve query performance.
Scaling Network Information Services to Support HetNets and Dynamic Spectrum Access
Esa Piri,Henning Schulzrinne 한국통신학회 2014 Journal of communications and networks Vol.16 No.2
Wireless network information services allow end systemsto discover heterogeneous networks and spectrumavailable for secondaryuse at or near their current location, helping them to copewith increasing traffic and finite spectrum resources. We propose aunified architecture that allows end systems to find nearby base stationsthat are using either licensed, shared or unlicensed spectrumacross multiple network operators. Our study evaluates the performanceand scalability of spatial databases storing base stationcoverage area geometries. The measurement results indicate thatthe current spatial databases perform well even when the numberof coverage areas is very large. A single logical spatial databasewould likely be able to satisfy the query load for a large nationalcellular network. We also observe that coarse geographic divisionscan significantly improve query performance.
Effect of Head of the Line Blocking on Session Initiation Protocol Session Establishment Delays
Gonzalo Camarillo,Henning Schulzrinne,Salvatore Loreto,Jani Hautakorpi 한국통신학회 2009 Journal of communications and networks Vol.11 No.1
We have studied the effect of head of the line blocking (HOLB) on session initiation protocol (SIP) session establishment delays. Our results are based on experiments performed in a test bed and on the public Internet. We used the stream control transmission protocol (SCTP) as a transport for SIP because SCTP can be configured to suffer or to avoid HOLB. Our experiments show that the effect of HOLB on session establishment delays generally starts to be significant starting at fairly low packet loss rates. However, there are scenarios where network conditions are good enough to make the effect of HOLB insignificant.