公开(公告)号：US07013146B2

公开(公告)日：2006-03-14

申请号：US10481981

申请日：2001-06-27

Applicant: Yan Wang ,  Suli Zhao ,  Hao Guan

Inventor： Yan Wang ,  Suli Zhao ,  Hao Guan

IPC: H04Q7/20

CPC classification number: H04W74/008 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0025 ,  H04W40/00 ,  H04W52/262 ,  H04W52/36 ,  H04W52/48 ,  H04W52/50 ,  H04W74/0833

Abstract: The present invention provides a method to enhance the RACH message transmission of a wireless communication systems. Therefore the known RACH procedure for uplink transmission is extended by additional steps in order to allow the usage of adaptive transmission parameters for uplink transmissions, preferably the usage of adaptive modulation and coding (AMC). This is advantageous because studies in high-speed downlink packet access show the possibility to increase the data rate of a downlink shared channel. The method according to the invention introduces a new RACH message preamble and enables the base station to estimate suitable adaptive transmission parameters like an AMC setting according to the current transmission conditions which are used during the RACH message transmission.

Abstract translation: 本发明提供一种增强无线通信系统的RACH消息传输的方法。 因此，用于上行链路传输的已知的RACH过程通过附加步骤来扩展，以便允许使用用于上行链路传输的自适应传输参数，优选地使用自适应调制和编码（AMC）。 这是有利的，因为在高速下行链路分组接入中的研究表明提高下行链路共享信道的数据速率的可能性。 根据本发明的方法引入了新的RACH消息前同步码，并且使得基站能够根据在RACH消息传输期间使用的当前传输条件来估计合适的自适应传输参数，如AMC设置。

公开(公告)号：US20120320733A1

公开(公告)日：2012-12-20

申请号：US13460788

申请日：2012-04-30

Applicant: Suli Zhao ,  Ajith Tom Payyappilly ,  Jinghui Yang ,  Sidharth D. Chitnis ,  Shrawan Kumar Khatri

Inventor： Suli Zhao ,  Ajith Tom Payyappilly ,  Jinghui Yang ,  Sidharth D. Chitnis ,  Shrawan Kumar Khatri

IPC: H04W24/00 ,  H04W36/00

CPC classification number: H04W76/20 ,  H04W36/0011

Abstract: During inter-radio access technology (IRAT) handover between LTE and eHRPD technologies, Internet protocol (IP) service continuity at a user equipment (UE) may be maintained. Thus, a method, an apparatus, and a computer program product are provided for maintaining the IP service continuity during IRAT handover from an SRAT to a TRAT within an evolved packet core (EPC)—capable region. The apparatus attempts to transfer an EPC context to a TRAT, determines that a failure occurs when attempting to transfer the EPC context to the TRAT, and attempts to maintain at least one IP service continuity within the EPC context according to the failure. The attempt to maintain may include an attempt to maintain an entire EPC context or a set of parameters including at least one of an IP address, a domain name system (DNS) address, a proxy call session control function (P-CSCF) address, or a quality of service (QoS).

Abstract translation: 在LTE和eHRPD技术之间的无线间接入技术（IRAT）切换期间，可以维护用户设备（UE）处的因特网协议（IP）业务连续性。 因此，提供了一种方法，装置和计算机程序产品，用于在演进的分组核心（EPC）能力区域内的SRAT到SRAT之间的TRAT切换期间维持IP服务连续性。 该设备尝试将EPC上下文传送到TRAT，确定在尝试将EPC上下文传送到TRAT时发生故障，并尝试根据故障在EPC上下文内保持至少一个IP服务连续性。 维护的尝试可以包括维护整个EPC上下文或一组参数的尝试，包括IP地址，域名系统（DNS）地址，代理呼叫会话控制功能（P-CSCF）地址， 或服务质量（QoS）。