Reliability detection of channel quality indicator (CQI) and application to outer loop power control

• US 8,010,053 B2
• Filed: 05/12/2009
• Issued: 08/30/2011
• Est. Priority Date: 12/04/2002
• Status: Expired due to Fees

• Current Assignee: Pantech Wireless, LLC (Ideahub, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Rudolf, Marian, Dick, Stephen G., Miller, James M.
• Primary Examiner(s): Dao, Minh D
• Application Number:
  US12/464,312
• Publication Number:
  US 20090221329A1
• Time in Patent Office: 840 Days
• Field of Search: 455/69, 455/562.1, 455/561, 370/335, 370/342, 370/328, 370/329
• US Class Current: 455/69
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0033 arrangements specific to the transmitter
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04W 28/24 Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
• 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 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/20 using error rate
• CPC Class Codes: H04W 52/262 taking into account adaptive modulation and coding [AMC] scheme AMC per se H04L1/0001
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for determining a channel quality in wireless communications includes receiving a high speed shared control channel (HS-SICH) transmission. An expected number of HS-SICH transmissions and a number of unsuccessful HS-SICH transmissions are counted. The number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions. The expected number of HS-SICH transmissions and the number of unsuccessful HS-SICH transmissions over a fixed time period are periodically reported, whereby the reporting is an indication of the channel quality.

Claims

1. A method for determining a channel quality in wireless communications, comprising:

receiving a high speed shared control channel (HS-SICH) transmission;

counting an expected number of HS-SICH transmissions;

counting a number of unsuccessful HS-SICH transmissions, wherein the number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions; and

periodically reporting the expected number of HS-SICH transmissions and the number of unsuccessful HS-SICH transmissions over a fixed time period, whereby the reporting is an indication of the channel quality.

2. A base station configured to determine a channel quality, comprising:

a receiver configured to receive a high speed shared control channel (HS-SICH) transmission;

a counter configured to count an expected number of HS-SICH transmissions and a number of unsuccessful HS-SICH transmissions, wherein the number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions; and

a reporting device configured to periodically report the expected number of HS-SICH transmissions and the number of unsuccessful HS-SICH transmissions over a fixed time period, whereby the report is an indication of the channel quality.

3. A base station configured to determine a channel quality, comprising:

a receiver configured to receive a high speed shared control channel (HS-SICH) transmission;

a first counter configured to count an expected number of HS-SICH transmissions;

a second counter configured to count a number of unsuccessful HS-SICH transmissions, wherein the number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions; and

a reporting device configured to periodically report the values of said first counter and said second counter over a fixed time period, whereby the report is an indication of the channel quality.

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

a transmitter configured to transmit a plurality of high speed shared control channel (HS-SICH) transmissions;

a receiver configured to receive a power control command, the power control command being derived by;

counting an expected number of HS-SICH transmissions;

counting a number of unsuccessful HS-SICH transmissions, wherein the number of unsuccessful HS-SICH transmissions includes a number of failed HS-SICH transmissions and a number of missed HS-SICH transmissions; and

comparing the counted values to a predetermined threshold; and

a transmission power adjusting device configured to adjust an uplink transmission power of the WTRU based on the power control command.