Global Standard and Strategy Lab. 3GPP2 Signaling subpart Enhanced Reduced Slot Cycle Mode NoticeSamsung Electronics grants a free, irrevocable license to 3GPP2 and its Organizational Partners to incorporate text or other copyrightable material contained in the contribution and any modifications thereof in the creation of 3GPP2 publications; to copyright and sell in Organizational Partner's name any Organizational Partner's standards publication even though it may include all or portions of this contribution; and at the Organizational Partner's sole discretion to permit others to reproduce in whole or in part such contribution or the resulting Organizational Partner's standards publication. Samsung Electronics is also willing to grant licenses under such contributor copyrights to third parties on reasonable, non-discriminatory terms and conditions for purpose of practicing an Organizational Partner’s standard which incorporates this contribution.This document has been prepared by Samsung Electronics to assist the development of specifications by 3GPP2. It is proposed to the Committee as a basis for discussion and is not to be construed as a binding proposal on Samsung Electronics. Samsung Electronics specifically reserves the right to amend or modify the material contained herein and to any intellectual property of Samsung lectronics other than provided in the copyright statement above. Yuchul Kim, Purva R. Rajkotia, Jungsoo Jung, B. S. Bae, Daegyun Kim, {yuchul.kim, jungsoo, bsbae, jungsoo, bsbae, Samsung Electronics Co., Ltd. Tel: Mobile: Abstract: This contribution introduces a method for enhancing reduced slot cycle mode

Copyright © SAMSUNG Electronics Co., Ltd SAMSUNG Proprietary Confidential Background Cdma2000 Rev.D support RSC mode for fast call setup.Cdma2000 Rev.D support RSC mode for fast call setup. RSC modeRSC mode –When call is released, MS or BS can initiate the RSC mode through Release Order, ERM, ERRM. –If MS and BS agree to operate in RSC mode, they start to operate with Reduced Slot Cycle Index (RSCI) for a predefined time (RSC_END_TIME). – If the RSC timer expires, MS and BS returns to regular slotted mode, in which MS and BS operates, in the normal Slot Cycle Index (SCI)

Copyright © SAMSUNG Electronics Co., Ltd SAMSUNG Proprietary Confidential Motivation for Enhanced RSC mode However, call arrival characteristics tells that the call inter-arrival time has exponential distribution (Poisson arrival).However, call arrival characteristics tells that the call inter-arrival time has exponential distribution (Poisson arrival). But current RSC mode does not take into account such characteristics.But current RSC mode does not take into account such characteristics. Hence, the RSC need to be fixed to operate based on call arrival characteristics for reduced paging delay and power efficient operation.Hence, the RSC need to be fixed to operate based on call arrival characteristics for reduced paging delay and power efficient operation. We propose an new slot cycle mode can achieve both the short paging delay as well as long battery life.We propose an new slot cycle mode can achieve both the short paging delay as well as long battery life. ERSC mode increases the frequency of paging channel monitoring period slowly as the call arrival rate decreases.ERSC mode increases the frequency of paging channel monitoring period slowly as the call arrival rate decreases.

Copyright © SAMSUNG Electronics Co., Ltd SAMSUNG Proprietary Confidential Enhanced RSC mode The negotiation policy between MS and BS are the same as current RSC mode.The negotiation policy between MS and BS are the same as current RSC mode. If MS and BS agrees to operate in ERSC mode with {RSCI, Normal SCI, t}, they begin operates in ERSC mode with RSCI.If MS and BS agrees to operate in ERSC mode with {RSCI, Normal SCI, t}, they begin operates in ERSC mode with RSCI. The SCI is increased by one at every time t.The SCI is increased by one at every time t. The total operation time of ERSC mode is determined as t*(Normal SCI- RSCI).The total operation time of ERSC mode is determined as t*(Normal SCI- RSCI).

Copyright © SAMSUNG Electronics Co., Ltd SAMSUNG Proprietary Confidential Benefits of ERSC mode Reduced Paging DelayReduced Paging Delay –The paging delay is reduced because ERSC always starts to operate based on call arrival characteristics, the call arrival characteristics is reflected operation time t. –If call arrival rate is low, large value of t is used. –If call arrival rate is high, small value of t is used. –Ex If call arrival rate is given as A, the pdf of call inter-arrival time is given as A*exp(-At). Then, t can be determined as the function of A such that t=f(A). Increased Battery LifeIncreased Battery Life –When the same amount of energy is used for RSC and ERSC mode, the gradual increase of channel monitoring frequency extends the extended operation time of ERSC mode, which eventually increase the battery life of the MS.

Copyright © SAMSUNG Electronics Co., Ltd SAMSUNG Proprietary Confidential Reduced Paging Delay and Increased Battery Life The paging delay and battery life of MS when ERSC and RSC starts with the same RSCI value. Lamda is the call arrival rate.

Copyright © SAMSUNG Electronics Co., Ltd SAMSUNG Proprietary Confidential References Basic operationBasic operation –C SAM_Rev.D_bug_14.doc Comparison of ERSC modeComparison of ERSC mode –C R1-SAM_Comparison of ERSC modes.xls Performance of ERSC mode (Paging Delay)Performance of ERSC mode (Paging Delay) –C R2_SAM_performance of ERSC.doc Performance of ERSC mode (Battery Life and Paging Delay)Performance of ERSC mode (Battery Life and Paging Delay) –C _Samsung_SAM_performance _of_ERSC_pr(PD_and_Battery_Life).doc