HANDOVER MANAGEMENT USING A BROADCAST CHANNEL IN A NETWORK HAVING SYNCHRONIZED BASE STATIONS
First Claim
1. A communication network comprising:
- a source base station providing wireless communication service to a mobile wireless communication device;
a target base station time synchronized to the source base station and broadcasting, to the mobile wireless communication device, handover information over a broadcast channel shared by the source base station and the target base station, the handover information necessary for the mobile wireless communication device to perform a handover from the source base station to the target base station; and
a position monitor providing position information related to a position of the mobile wireless communication device, the target base station broadcasting the handover information at a time at least partially based on the position information.
1 Assignment
0 Petitions
Accused Products
Abstract
Handovers of mobile wireless communications device from a source base station to a target base station are managed by transmitting handover information over a shared broadcast channel The handover information required by a mobile wireless communication device for performing a handover may be transmitted within a Multicast Broadcast Multimedia Services (MBfviS) Single Frequency Network (M8SFN) subframe in some circumstances. In one example, the handover information includes Uplink (UL) allocation information, timing advance (TA) information, and a Cell Radio Network Temporary Identifier (C-RNTI), The synchronization between base stations of the MBMS system allows for the elimination of some messaging required in conventional systems for synchronization between the mobile wireless communication service and a target base station. As a result the time for performing a handover is reduced.
-
Citations
23 Claims
-
1. A communication network comprising:
-
a source base station providing wireless communication service to a mobile wireless communication device; a target base station time synchronized to the source base station and broadcasting, to the mobile wireless communication device, handover information over a broadcast channel shared by the source base station and the target base station, the handover information necessary for the mobile wireless communication device to perform a handover from the source base station to the target base station; and a position monitor providing position information related to a position of the mobile wireless communication device, the target base station broadcasting the handover information at a time at least partially based on the position information. - View Dependent Claims (8, 9, 10, 11, 13, 14, 15)
-
- 2. The communication network of claim wherein the handover information is broadcast within a Multicast Broadcast Multimedia Services (MBMS) Single Frequency Network (MBSFN) subframe.
-
12. The communication network of c aim 11, wherein the handover request message comprises:
a C-RNTI of the mobile wireless communication device;
-
16. A mobile wireless communication device:
a receiver configured to receive a Multicast Broadcast Multimedia Services (MBMS) Single Frequency Network (MBSFN) subframe comprising handover information necessary for the wireless communication device to perform a handover to a base station from another base station, the MBMS MBSFN subframe broadcasted at a time at least partially based on a position of the mobile wireless communication device. - View Dependent Claims (17, 18, 19, 20, 21, 22)
-
23. A base station comprising:
a transmitter configured to transmit a Multicast Broadcast Multimedia Services (MBMS) Single Frequency Network (MBSFN) subframe comprising handover information necessary for a wireless communication device to perform a handover to the base station from another base station, the transmitter configured to transmit the MBMS MBSFN subframe at a time at least partially based on a position of the wireless communication device.
Specification