公开(公告)号：WO1996013912A1

公开(公告)日：1996-05-09

申请号：PCT/US1995013767

申请日：1995-10-25

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  SHAUGHNESSY, Mark ,  MCDONALD, Daniel ,  SASUTA, Michael

IPC: H04B07/20

CPC classification number: H04W4/08 ,  H04W4/06 ,  H04W60/00

Abstract: The present invention encompasses a method of facilitating talkgroup communications across a multiple-system communication network (100). A typical multisystem network (100) includes a plurality of communication units (122), a plurality of communication location areas (117-119), and a plurality of system controllers (100, 116). Upon migration of a communication unit (122) from one communication system to another, the communication unit (122) sends a registration request to the system controller (116) at the new communication system (102). The system controller (116) determines whether the talkgroup of the migrating communication unit (122) is registered with the new communication system (102). If the talkgroup is not registered with the new system (102), a database (120) is updated with the new talkgroup information, thereby facilitating talkgroup communication involving members of the talkgroup.

Abstract translation: 本发明包括一种促进跨多系统通信网络（100）的通话组通信的方法。 典型的多系统网络（100）包括多个通信单元（122），多个通信位置区域（117-119）和多个系统控制器（100,116）。 通信单元（122）在将通信单元（122）从一个通信系统迁移到另一个通信单元（122）时，在新的通信系统（102）向系统控制器（116）发送注册请求。 系统控制器（116）确定迁移通信单元（122）的通话组是否向新的通信系统（102）注册。 如果通话组没有向新系统（102）注册，则用新的对话组信息更新数据库（120），从而便于涉及话音组成员的通话组通信。

公开(公告)号：EP1108302B1

公开(公告)日：2008-07-30

申请号：EP99942434.4

申请日：1999-08-24

Applicant: MOTOROLA, INC.

Inventor： SHAUGHNESSY, Mark ,  MATHIS, James, E. ,  KUMAR, Surender ,  PATEL, Bhavesh, G. ,  DERANGO, Mario, F.

IPC: H04J3/12

CPC classification number: H04W84/08

Abstract: A wireless communication system (200) comprises a connectionless packet network (201) coupled to a plurality of sites (203-208) that are in wireless communication with a plurality of subscriber units (210-217) logically arranged into a plurality of talk groups having corresponding talk group identifications. In one embodiment, each site maintains mappings (220-225) of at least one multicast address to at least one talk group identification. In another embodiment, individual subscriber units maintain such mappings (320). When a subscriber unit affiliates with a given site and talk group (501, 601), the site identifies a multicast address corresponding to the talk group. Based on the multicast address, the site can participate in traffic targeted for the multicast address and, consequently, for the talk group. In this manner, mobility processing is decentralized, system scalability is improved and call setup delays are minimized.

公开(公告)号：EP1108302A1

公开(公告)日：2001-06-20

申请号：EP99942434.4

申请日：1999-08-24

Applicant: MOTOROLA, INC.

Inventor： SHAUGHNESSY, Mark ,  MATHIS, James, E. ,  KUMAR, Surender ,  PATEL, Bhavesh, G. ,  DERANGO, Mario, F.

IPC: H04J3/12

CPC classification number: H04W84/08

Abstract: A wireless communication system (200) comprises a connectionless packet network (201) coupled to a plurality of sites (203-208) that are in wireless communication with a plurality of subscriber units (210-217) logically arranged into a plurality of talk groups having corresponding talk group identifications. In one embodiment, each site maintains mappings (220-225) of at least one multicast address to at least one talk group identification. In another embodiment, individual subscriber units maintain such mappings (320). When a subscriber unit affiliates with a given site and talk group (501, 601), the site identifies a multicast address corresponding to the talk group. Based on the multicast address, the site can participate in traffic targeted for the multicast address and, consequently, for the talk group. In this manner, mobility processing is decentralized, system scalability is improved and call setup delays are minimized.