Power control of point to multipoint physical channels

• US 8,606,282 B2
• Filed: 04/12/2010
• Issued: 12/10/2013
• Est. Priority Date: 08/01/2002
• Status: Active Grant

• Current Assignee: Pantech Wireless, LLC (Ideahub, Inc.)
• Original Assignee: Signal Trust for Wireless Innovation (InterDigital, Inc.)
• Inventors: Terry, Stephen E.
• Primary Examiner(s): Nguyen, Tu X
• Application Number:
  US12/758,330
• Publication Number:
  US 20100197341A1
• Time in Patent Office: 1,338 Days
• Field of Search: 455/69, 455/522, 455/503, 455/504, 455/10, 455/63.1
• US Class Current: 455/450
• CPC Class Codes: H04W 52/06 TPC algorithms
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/28 using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
• CPC Class Codes: H04W 52/322 Power control of broadcast channels
• CPC Class Codes: H04W 52/327 Power control of multicast channels
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A method and apparatus are used to determine an efficient transmit power for point to multipoint (PtM) transmissions by maintaining a database at a base station which specifies which of a plurality of wireless transmit/receive units (WTRUs) are members of each PtM group. The transmit power of each WTRU'"'"'s downlink dedicated channel is adjusted to the minimum required power necessary and the PtM transmit power for each PtM group is set such that the PtM transmit power of a PtM group is equal to the greatest of a WTRU in the PtM group plus a PtM power offset.

Claims

1. A wireless transmit/receive unit (WTRU) comprising:

components configured to transmit using at least one uplink common channel;

the components are further configured to derive a physical layer control signal indicating whether the WTRU desires that a power level be increased; and

the components are further configured to access the at least one uplink common channel using a first access service class partition or a second access service class partition,

wherein the at least one uplink common channel is partitioned such that the first access service class partition is associated with transmission over the at least one uplink common channel with the physical layer control signal indicating whether the WTRU desires that the power level be increased and the second access service class partition is associated with transmission over the at least one uplink common channel without the physical layer control signal.

2. The WTRU of claim 1 wherein the at least one uplink common channel is associated with a forward access channel (EACH).

3. The WTRU of claim 1 wherein the components are further configured to receive a point to multipoint channel.

4. The WTRU of claim 1 wherein the components are further configured to receive a high speed shared channel.

5. The WTRU of claim 1 wherein the components are further configured in response to having dedicated resources to transmit the physical layer control signal on an uplink dedicated control channel instead of the uplink common channel.

6. A method comprising:

deriving, by a wireless transmit/receive unit (WTRU), a physical layer control signal indicating whether the WTRU desires that a power level be increased; and

transmitting, by the WTRU, at least one uplink common channel using a first access service class partition or a second access service class partition, wherein the at least one uplink common channel is partitioned such that the first access service class partition is associated with transmission over the at least one uplink common channel with the physical layer control signal indicating whether the WTRU desires that the power level be increased and the second access service class partition is associated with transmission over the at least one uplink common channel without the physical layer control signal.

7. The method of claim 6 wherein the at least one uplink common channel is associated with a forward access channel (FACH).

8. The method of claim 6 further comprising receiving, by the WTRU, a point to multipoint channel.

9. The method of claim 6 further comprising receiving, by the WTRU, a high speed shared channel.

10. The method of claim 6 further comprising:

in response to having dedicated resources, transmitting, by the WTRU, the physical layer control signal on an uplink dedicated control channel instead of the uplink common channel.