公开(公告)号：US09826419B2

公开(公告)日：2017-11-21

申请号：US14685347

申请日：2015-04-13

Applicant: QUALCOMM Incorporated

Inventor： Pratik Kotkar ,  Alexei Yurievitch Gorokhov ,  Sachin Saraswat ,  Ning Yin ,  Srinivasan Rajagopalan ,  Muralidharan Murugan ,  Santosh Kumar Rongala

IPC: H04W24/02 ,  H04L5/14 ,  H04L1/18 ,  H04L29/06 ,  H04W48/16 ,  H04W84/04 ,  H04W52/02

CPC classification number: H04W24/02 ,  H04L1/1812 ,  H04L5/14 ,  H04L65/4076 ,  H04W48/16 ,  H04W52/0219 ,  H04W52/0229 ,  H04W84/045 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/164

Abstract: Techniques for optimized cell acquisition for long term evolution (LTE) time division duplex (TDD) systems or closed subscriber group (CSG)/evolved Multicast Broadcast Multimedia Service (eMBMS) capable user equipments (UEs) are disclosed. A UE obtains configuration information, CSG capability information, and/or eMBMS capability information for a cell. The UE also stores the obtained information for the cell in a cell information database. In some aspects, the UE may employ the CSG and/or eMBMS capability information to select a weaker cell, during initial frequency scan at power up of the UE, based on cell capability. Additionally or alternatively, the UE may employ the configuration information to determine an initial mutual information (Mi) hypothesis value for physical hybrid-automatic repeat request (HART) indicator channel (PHICH) group mapping of the cell. Additionally or alternative, radio link failures and/or out of synch events may be predicted and proactive responses employed based on previously obtained solutions.

公开(公告)号：US11357015B2

公开(公告)日：2022-06-07

申请号：US16228200

申请日：2018-12-20

Applicant: QUALCOMM Incorporated

Inventor： Cheol Hee Park ,  Ashish Shankar Iyer ,  Arvind Vardarajan Santhanam ,  Hongsan Sheng ,  Subramanya Rao ,  Feng Lu ,  Santosh Kumar Rongala ,  Li Sheng ,  Yuanbo Wang

IPC: H04W72/08 ,  H04W24/08 ,  H04W4/40 ,  H04L43/16 ,  H04B17/318 ,  H04W72/04

Abstract: Aspects of the present disclosure implement techniques that allow a vehicle performing V2X communications to provide more accurate S-RSSI measurements and CBR calculations for use in channel selection and congestion control. Techniques may include measuring a sidelink received signal strength indicator (S-RSSI) for each of a plurality of sub-channels, determining one or more signal impairment adjustment factors based on the S-RSSI for each of the plurality of sub-channels, calculating a channel busy ratio (CBR) for the plurality of sub-channels based on the one or more signal impairment adjustment factors, and initiating communication with at least one of the plurality of sub-channels based on at least the CBR.

公开(公告)号：US20150296391A1

公开(公告)日：2015-10-15

申请号：US14685347

申请日：2015-04-13

Applicant: QUALCOMM Incorporated

Inventor： Pratik Kotkar ,  Alexei Yurievitch Gorokhov ,  Sachin Saraswat ,  Ning Yin ,  Srinivasan Rajagopalan ,  Muralidharan Murugan ,  Santosh Kumar Rongala

IPC: H04W24/02 ,  H04L1/18 ,  H04L29/06 ,  H04L5/14

CPC classification number: H04W24/02 ,  H04L1/1812 ,  H04L5/14 ,  H04L65/4076 ,  H04W48/16 ,  H04W52/0219 ,  H04W52/0229 ,  H04W84/045 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/164

Abstract: Techniques for optimized cell acquisition for long term evolution (LTE) time division duplex (TDD) systems or closed subscriber group (CSG)/evolved Multicast Broadcast Multimedia Service (eMBMS) capable user equipments (UEs) are disclosed. A UE obtains configuration information, CSG capability information, and/or eMBMS capability information for a cell. The UE also stores the obtained information for the cell in a cell information database. In some aspects, the UE may employ the CSG and/or eMBMS capability information to select a weaker cell, during initial frequency scan at power up of the UE, based on cell capability. Additionally or alternatively, the UE may employ the configuration information to determine an initial mutual information (Mi) hypothesis value for physical hybrid-automatic repeat request (HART) indicator channel (PHICH) group mapping of the cell. Additionally or alternative, radio link failures and/or out of synch events may be predicted and proactive responses employed based on previously obtained solutions.

Abstract translation: 公开了用于长期演进（LTE）时分双工（TDD）系统或封闭用户组（CSG）/演进的组播广播多媒体业务（eMBMS）能力用户设备（UE）的优化小区采集技术。 UE获取小区的配置信息，CSG能力信息和/或eMBMS能力信息。 UE还将获得的小区信息存储在小区信息数据库中。 在一些方面，UE可以在基于小区能力的UE上电期间的初始频率扫描期间采用CSG和/或eMBMS能力信息来选择较弱的小区。 附加地或替代地，UE可以采用配置信息来确定用于小区的物理混合自动重传请求（HART）指示符信道（PHICH）组映射的初始互信息（Mi）假设值。 另外或替代地，可以基于先前获得的解决方案来预测和主动响应无线电链路故障和/或不同步事件。