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Enhanced ECCLM & EGSRDM: SWG23 Status

Enhanced ECCLM & EGSRDM: SWG23 Status. Ragulan Sinnarajah Chair, SWG23 Qualcomm Incorporated ragulans@qualcomm.com 1/11/05. Introduction. Various proposals received in SWG23 to enhance current ECCLM & EGSRM procedures

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Enhanced ECCLM & EGSRDM: SWG23 Status

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  1. Enhanced ECCLM & EGSRDM:SWG23 Status Ragulan Sinnarajah Chair, SWG23 Qualcomm Incorporated ragulans@qualcomm.com 1/11/05 1

  2. Introduction • Various proposals received in SWG23 to enhance current ECCLM & EGSRM procedures • Enhanced mechanisms to selectively distribute mobiles to different band/frequency, without performance degradation • See last slide for contribution list • Multi-band/band subclass deployments may become more common place • New mobiles support multiple bands/band subclasses 2

  3. Current Mechanism • Paging channel assignment • Can be used to direct an MS to a paging channel on a different band/frequency • Limitations: Has to be done individually for each MS • Traffic channel assignment • Can be used to assign an MS to a traffic channel on a different band/frequency • Limitations: Has to be done individually for each MS • Extended CDMA Channel List Message (ECCLM) • Broadcast message used to distribute mobiles across different frequencies within same band based on limited set of MS capabilities • Limitations: only intra-band, limited controls, only uniform distribution • Extended Global Service Redirection Message (EGSRDM) • Broadcast message used to redirect mobiles to different frequency/band based on limited set of MS capabilities • Limitations: only single redirection, limited controls, must go through system determination (delay) 3

  4. Proposed Enhancements to ECCLM • Allow non-uniform distribution: Weight-based hashing • In ECCLM, optionally add a new parameter “frequency weight” for each frequency to indicate the weight associated with that frequency • These weights are taken into account when hashing: larger weight  higher probability of hashing to that frequency • Allow Inter-band hashing • In ECCLM, optionally add band class & band subclass parameter to each frequency listed • MS can hash to a frequency on different band subclass or bandclass • Allow MS to go directly to idle state • Reduces number of hops to idle in new band/frequency 4

  5. Proposed Enhancements to ECCLM .. • Allow Inter-band hashing .. • Issue: MS may not support all bands or band subclass included in ECCLM. MS needs to skip over these to pick a frequency. How does BS know which ones MS skipped over? • In each registration, MS includes list of all bands/band subclasses support • same logic as QPCH/RC/TD support • BS signals in overhead which bands/band subclass deployed in that sector. In each registration, MS indicates which ones out the BS list the MS supports • Network queries the band/band subclass capability info rec via status request and MSC passes that info down to each BSC when sending a message to MS • Keep the current requirement that MS must register (power up registration) whenever it changes band or band subclass 5

  6. Proposed Enhancements to EGSRDM • Allow multiple redirection records in EGSRDM • Multiple redirections can be performed in parallel • Need to define rule for MS action • Ex. Act upon the first applicable record • Allow MS to go directly to Idle State on redirected band/frequency • Same as in Enhanced ECCLM • Allow MS to remain in current freq if MS does not support any of the bands in EGSRDM • Based on a flag; otherwise, MS must leave and look for another system • Bug in current standard? • Allow MS to ignore EGSRDM for a specified duration if MS couldn’t acquire the band being re-directed 6

  7. Next steps • Decide which enhancements group wants to make in Rev D Addendum • Assignment to companies to write stage 3 text for agreed upon enhancements 7

  8. Contribution List • C23-20040823-009 --- Enhancement to Inter-Band Registration Procedures, Lucent • C23-20041018-002 --- Inter-Band Load Balancing, Lucent/Nortel • C23-20041018-013 --- Clarification of Zone Based Registration fields in Mobile Station Registered Message, Lucent • C23-20041018-014 --- Service Redirection Loop in Multi-Band Network through Soft Redirection, Lucent • C23-20041018-014A --- Soft Service Redirection Techniques, Lucent • C23-20041018-015 --- Support for ALT_BAND_CLASS_SUP in RGM and RCNM, Lucent • C23-20041206-006 --- Responses to Questions on Inter-Band Hashing and Soft Redirection, Lucent • C23-20041206-007 --- Support for Band Class Bitmap in RGM and RCNM, Lucent • C23-20041206-008 --- “Service Redirection Bug Fix”, Motorola 8

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