# US 7,610,059 B2 · Method and system wherein timeslots allocated for common control channels may be reused for user traffic

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- Number: US 7,610,059 B2
- Document ID: US7610059B2
- Status: Granted
- Kind: B2
- Application number: 12/260,338
- Filed: 2008-10-29
- Published: 2009-02-26
- Granted: 2009-10-27
- Earliest claimed: 2003-07-09
- Assignees: InterDigital Technology Corporation
- Inventors: Vincent Roy; Paul Marinier
- Web page: https://patentgrep.com/patent/US7610059B2

## CPC

- H04J 11/005: {of intercell interference}
- H04W 16/02: Resource partitioning among network components, e.g. reuse partitioning
- H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/0473: {the resource being transmission power}
- H04W 72/20: Control channels or signalling for resource management
- H04W 72/30: Resource management for broadcast services
- H04W 16/06: Hybrid resource partitioning, e.g. channel borrowing
- H04W 28/16: Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W 72/541: using the level of interference
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method and system is disclosed wherein timeslots designated in a wireless communication system as Common Physical Channel (CPCH) timeslots may be reused for user traffic. A CPCH timeslot used in a first cell may be reused by a second cell, assuming the first and second cells transmit control information in different CPCH timeslots, for user traffic. The second cell is permitted to reuse the timeslot in which the first cell is transmitting control information so long as the second cell's reuse of that timeslot does not degrade reception of control information in the first cell.

## Claims

### Claim 1

A base station, including a processor, the processor configured to receive a quality metric reported from at least one wireless transmit/receive unit (WTRU) on a time slot designated for control information, transmit control information in a time slot designated specifically for the base station, wherein a neighboring base station uses a different time slot for transmission of control information relating to the neighboring base station, and adjust a maximum power limit for transmission within the cell associated with the base station; and
whereby the base station may transmit traffic data to the WTRU on the time slot designated for control information within the assigned maximum limit.

### Claim 2 (depends on 1)

The base station of claim 1 wherein the quality metric is specific to a primary common control physical channel (PCCPCH).

### Claim 3 (depends on 2)

The base station of claim 2 wherein the quality metric is measured by at least one of a broadcast channel (BCH) reading time and a signal-to-interference ratio (SIR) perceived on the PCCPCH.

### Claim 4 (depends on 1)

The base station of claim 1 wherein the quality metric is specific to a secondary common control physical channel (SCCPCH).

### Claim 5 (depends on 4)

The base station of claim 4 wherein the quality metric is measured by at least one of a fast access channel (FACH) block error rate, an FACH bit error rate, and a signal-to-interference ratio (SIR) perceived on the SCCPCH.

### Claim 6

A wireless transmit/receive unit (WTRU), the WTRU including a processor, the processor configured to transmit a quality metric on a time slot designated for control information, receive a maximum power limit adjustment signal, and adjust its transmission power in accordance with the received maximum power limit adjustment signal; and
whereby the WTRU may receive traffic data from a base station on the time slot designated for control information within the assigned maximum limit.

### Claim 7 (depends on 6)

The WTRU of claim 6 wherein the quality metric is specific to a primary common control physical channel (PCCPCH).

### Claim 8 (depends on 7)

The WTRU of claim 7 wherein the quality metric is measured by at least one of a broadcast channel (BCH) reading time and a signal-to-interference ratio (SIR) perceived on the PCCPCH.

### Claim 9 (depends on 6)

The WTRU of claim 6 wherein the quality metric is specific to a secondary common control physical channel (SCCPCH).

### Claim 10 (depends on 9)

The WTRU of claim 9 wherein the quality metric is measured by at least one of a fast access channel (FACH) block error rate, an FACH bit error rate, and a signal-to-interference ratio (SIR) perceived on the SCCPCH.

### Claim 11 (depends on 6)

The WTRU of claim 6 wherein the quality metric measured by the WTRU is associated with a location of the WTRU.

### Claim 12 (depends on 11)

The WTRU of claim 11 wherein the location of the WTRU is measured by at least one of a global positioning system (GPS) and triangulation techniques.