公开(公告)号：US20190174549A1

公开(公告)日：2019-06-06

申请号：US15752890

申请日：2016-07-12

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Fangli XU ,  Jianhua LIU ,  Xinyu LI

IPC: H04W74/08 ,  H04W4/70

Abstract: The present invention provides an MTC UE random access method and device. The method comprises: receiving indication information sent by a network side, the indication information being used for indicating at least one coverage enhancement level (CE LEVEL) and a physical random access channel (PRACH) resource corresponding thereto; selecting one CE LEVEL from a CE LEVEL of an MTC UE and the CE LEVEL indicated by the network side, and determining a PRACH resource corresponding to the CE LEVEL; and carrying out random access on the PRACH resource corresponding to the selected CE LEVEL. The present invention provides a mechanism of how to select a PRACH resource when a network side triggers an MTC UE to initiate a contention-free random access (CFRA) process.

公开(公告)号：US20160323719A1

公开(公告)日：2016-11-03

申请号：US15105644

申请日：2014-12-24

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Ying WANG ,  Jianhua LIU ,  Yali ZHAO

IPC: H04W4/08 ,  H04W72/14 ,  H04W56/00 ,  H04W76/04 ,  H04W72/04 ,  H04W72/12 ,  H04W76/00

CPC classification number: H04W4/08 ,  H04L12/189 ,  H04W56/0015 ,  H04W72/042 ,  H04W72/121 ,  H04W72/14 ,  H04W76/25 ,  H04W76/40 ,  H04W88/16

Abstract: Disclosed are a method, device and system for maintaining the continuity of a group communication service, for solving the problem in the prior art that the service continuity requirement of group communication may not be satisfied due to the switching of network service from multicast transmission to unicast transmission in an MBSFN domain. The method comprises: when determining that group communication service needs to be switched from multicast transmission to unicast transmission, a GCSE-AS notifies a terminal served by the GCSE-AS that the GCSE-AS is going to switch the group communication service from multicast transmission to unicast transmission; and after receiving a first notification message transmitted by the terminal, the GCSE-AS transmits the group communication service over a unicast carrier established by the terminal for unicast transmission, and stops transmitting the communication service in multicast mode. The terminal has already established a unicast carrier for unicast transmission before the GCSE-AS switches the group communication service from multicast transmission to unicast transmission, thus ensuring the continuity of the group communication service.

Abstract translation: 公开了一种用于维持组通信业务的连续性的方法，设备和系统，为了解决现有技术中的问题，由于从多播传输到单播的网络服务的转换，组通信的业务连续性要求可能不能满足 传输在MBSFN域。 该方法包括：当确定组通信业务需要从组播传输切换到单播传输时，GCSE-AS通知GCSE-AS所服务的终端GCSE-AS将从组播传输切换组通信业务 单播传输; 在接收到终端发送的第一通知消息之后，GCSE-AS通过单播建立的单播载波发送组播通信业务，进行单播传输，并以多播方式停止发送通信业务。 在GCSE-AS将群组通信业务从组播传输切换到单播传输之前，终端已经建立了用于单播传输的单播载波，从而保证了组通信业务的连续性。

公开(公告)号：US20150304821A1

公开(公告)日：2015-10-22

申请号：US14439666

申请日：2013-07-31

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Jianhua LIU ,  Dong CHEN

IPC: H04W4/06 ,  H04W72/12 ,  H04W72/00

CPC classification number: H04W4/06 ,  H04W16/14 ,  H04W72/005 ,  H04W72/1278

Abstract: The embodiments of the present application relate to the technical field of wireless communications, and in particular, to a method, system and device for transmitting data, so as to solve the problems existing in the prior art that a multicast message cannot be sent due to FACH limitation in a UMTS system, and a relatively large influence will be brought to the current system information scheduling mechanism if multicast data is issued through system information in an LTE system. The method of the embodiments of the present application comprises: a wireless access network receiving data of at least one group of user equipment from a core network, and the wireless access network transmitting data of a corresponding group to the user equipment in the group through user plane shared resource transmission. Due to this mode of adopting a shared channel to bear multicast data, the current relatively limited FACH resource in a UMTS system is thereby released, and the adoption of a shared channel can enable transfer of multicast data more rapidly and promptly. An LTE adopts a user plane to transmit multicast data, avoiding influence on the system information.

Abstract translation: 本申请的实施例涉及无线通信的技术领域，特别是涉及用于发送数据的方法，系统和设备，以便解决现有技术中存在的多播消息不能由于 如果通过LTE系统中的系统信息发出组播数据，则UMTS系统中的FACH限制以及相对较大的影响将被带到当前的系统信息调度机制。 本申请的实施例的方法包括：无线接入网络，从核心网接收至少一组用户设备的数据，无线接入网络通过用户向组内的用户设备发送对应组的数据 平面共享资源传输。 由于采用共享信道承载多播数据的这种模式，因此UMTS系统中当前相对有限的FACH资源被释放，并且共享信道的采用可以使得多播数据更快速和迅速地传送。 LTE采用用户平面传输组播数据，避免对系统信息的影响。