Point to multi-point services using shared channels in wireless communication systems

• US 20030228865A1
• Filed: 04/30/2003
• Published: 12/11/2003
• Est. Priority Date: 05/01/2002
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Terry, Stephen E.
• Granted Patent: US 8,995,991 B2
• Time in Patent Office: Days
• US Class Current: 455/422.1
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0634 Antenna weights or vector/matrix coefficients
• CPC Class Codes: H04L 12/185 with management of multicast group membership
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS

Abstract

Service data is transferred in a wireless communication system. A first service identification is synchronously transmitted for reception by a group of users of a cell in the system. The group of users does not include all of the users of the cell. Each of the group of users receives the service identification. Each of the group of users monitors for a second service identification being transmitted over a downlink shared channel. The service data is transmitted over the downlink shared channel with the second service identification. Each of the group of users detects the second service identification and receives the service data of the downlink shared channel.

Claims

1. A method for transferring service data in a wireless communication system, the method comprising:

simultaneously transmitting a service transmission indicator for reception by a group of users of a cell in the system, the group of users not including all of the users of the cell;

receiving by each of the group of users the service transmission indicator;

monitoring by each of the group of users for a service identification being transmitted over a downlink shared channel;

transmitting over the downlink shared channel the service data with the service identification; and

each of the group of users detecting the service identification and receiving the service data of the downlink shared channel.

2. The method of claim 1 wherein the service data is being sent to a plurality of user groups, each group being sent a different group identification, all the second group identifications sent in the downlink shared channel and all users of the plurality of user groups receiving the service data.

3. The method of claim 1 wherein each of the group of users has a unique downlink control channel on which the service transmission indication is sent.

4. The method of claim 3 wherein each of the group of users has a unique uplink control channel.

5. A Node-B comprising:

a user feedback receiver for receiving channel information from a plurality of users of a shared channel;

a downlink shared channel generator for producing data of a shared channel;

a power control device for determining a power level for each beam of the shared channel using the received channel information;

a beam steering controller for determining beams of the shared channel using the received channel information; and

an antenna array for transmitting the shared channel simultaneously over the determined beams at the determined power levels.

6. The Node-B of claim 5 wherein the channel information includes a pathloss estimate from each of the plurality of users.

7. The Node-B of claim 5 wherein the channel information includes an outer loop power command from each of the plurality of users.

8. The Node-B of claim 5 wherein the channel information includes an inner loop power command from each of the plurality of users.

9. The Node-B of claim 5 wherein the channel information includes a location for each of the plurality of users.

10. The Node-B of claim 5 wherein the power level for each beam is set at a power level for reception for a user having a worst channel quality based on the channel quality information.

11. A Node-B and radio network controller comprising:

a plurality of control channel generators for producing a plurality of control channels, each of the plurality of control channels having a service transmission identification sent simultaneously;

a measurement receiver for receiving measurements and information of transmission channel quality;

a power control device for determining a transmission power level for a shared channel using the received transmission channel quality measurements and information;

a shared channel data generator for producing data of the shared channel; and

an antenna for transmitting the produced shared channel data at the determined transmission power level.

12. A radio network controller comprising:

an input configured to receive data for point to point (PtP) and point to multi-point (PtM) services;

a scheduling mechanism for receiving the received data and scheduling the data for transmission as PtP and PtM transmissions on a transmission time interval (TTI) basis, the schedule for each TTI based on a quality of service requirement for the PtP and PtM data and power requirements of a cell associated with the PtP and PtM transmissions; and

a signaling device for signaling the data schedule to users.

13. The radio network controller of claim 12 wherein the schedule for each TTI is also based on beam steering information of users of the associated cell.

14. The radio network controller of claim 12 wherein the quality of service requirement includes a data latency requirement,

15. The radio network controller of claim 12 wherein the scheduling mechanism is capable of sending PtM transmission data as PtP transmissions.