U.S. Patent Nos.
7,349,540
United States Patent 7,349,540

Dick , et al. March 25, 2008
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Generation of user equipment identification specific scrambling code for high speed shared control channel
Abstract
A user equipment is used in a code division multiple access communication system. The user equipment comprises circuitry configured to process a user equipment identification (UE ID) by 1/2 rate convolutionally encoding the UE ID to produce a code. The code is used by the user equipment for descrambling a high speed shared control channel (HS-SCCH). The user equipment comprises circuitry configured to receive payload data over a high speed physical downlink shared channel (HS-PDSCH) associated with the HS-SCCH.
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Inventors: Dick; Stephen G. (Nesconset, NY), Bolourchi; Nader (Larchmont, NY), Shin; Sung-Hyuk (Northvale, NJ)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 10/779,431
Filed: February 13, 2004

7,502,406
United States Patent 7,502,406

Lomp , et al. March 10, 2009
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Automatic power control system for a code division multiple access (CDMA) communications system
Abstract
A receiver receives signals and noise over a frequency spectrum of a desired received signal. The desired received signal is spread using code division multiple access. The received signals and noise are demodulated to produce a demodulated signal. The demodulated signal is despread using a code uncorrelated with a code associated with the desired received signal. A power level of the despread demodulated signal is measured as an estimate of the noise level of the frequency spectrum.
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Inventors: Lomp; Gary (Centerport, NY), Ozluturk; Fatih (Port Washington, NY), Kowalski; John (Hempstead, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 10/084,007
Filed: February 27, 2002

7,536,013
United States Patent 7,536,013

Dick , et al. May 19, 2009
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User equipment identification specific scrambling
Abstract
A base station for use in a code division multiple access communication system comprises circuitry configured to process a user equipment identification (UE ID) by 1/2 rate convolutionally encoding the UE ID to produce a code. The code is used by the base station for scrambling a high speed shared control channel (HS-SCCH). The base station is configured to transmit a wireless signal. The wireless signal provides the user equipment with payload data carried on a high speed physical downlink shared channel (HS-PDSCH). The HS-PDSCH is associated with the HS-SCCH.
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Inventors: Dick; Stephen G. (Nesconset, NY), Bolourchi; Nader (Larchmont, NY), Shin; Sung-Hyuk (Northvale, NJ)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/796,534
Filed: April 24, 2007

7,616,970
United States Patent 7,616,970

Gorsuch November 10, 2009
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Dual mode unit for short range, high rate and long range, lower rate data communications
Abstract
A technique for communicating with a local area network (LAN) via a wireless connection determines whether a first short-range, high-speed, wireless communication path is available and connects to the LAN using a longer range, lower speed wireless communication path if the short-range, high-speed wireless communication path is not available. The low-range, high-speed wireless communication path is a wireless LAN connection such as an IEEE 802.11-compliant wireless LAN and the long-range, low-speed wireless communication mode is a cellular CDMA-type connection. Determining whether the first IEEE 802.11 mode is available can be done by detecting a beacon signal, or by transmitting a probe request message and detecting a probe response message in response to the probe request, indicating the presence or availability of the short-range, high-speed wireless communication path. Alternatively, the availability of short-range, high-speed wireless communication path can be detected by simply detecting activity on it.
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Inventors: Gorsuch; Thomas E. (Indialantic, FL)
Assignee: IPR Licensing, Inc. (Wilmington, DE)
Appl. No.: 11/326,809
Filed: January 6, 2006

7,706,332
United States Patent 7,706,332

Ozluturk , et al. April 27, 2010
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Method and subscriber unit for performing power control
Abstract
A system for rapidly acquiring a spreading code, used in a code division multiple access (CDMA) system, comprises a generator for generating a first long code and a second long code, with each long code having a length of N chips. The first long code is different from the second long code. A transmitter transmits the first long code and the second long code at a first phase angle and at a second phase angle, respectively, on a carrier signal over a communications channel using radio waves. The first long code and the second long code may be transmitted at an in-phase (I) angle and at a quadrature-phase (Q) angle, respectively, on the carrier signal. From the communications channel, an I acquisition circuit and a Q acquisition circuit may acquire, in parallel, the first long code and the second long code from the I angle and the Q angle, respectively, of the carrier signal by searching, in parallel, N/2 chips of the first long code and the second long code.
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Inventors: Ozluturk; Fatih (Port Washington, NY), Lomp; Gary (Centerport, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/181,450
Filed: July 14, 2005

7,706,830
United States Patent 7,706,830

Ozluturk , et al. April 27, 2010
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Method and subscriber unit for performing an access procedure
Abstract
A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.
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Inventors: Ozluturk; Fatih M. (Port Washington, NY), Lomp; Gary R. (Centerport, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 12/116,263
Filed: May 7, 2008

7,970,127
United States Patent 7,970,127

Dick , et al. June 28, 2011
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User equipment identification specific scrambling
Abstract
A base station for use in a code division multiple access communication system comprises circuitry configured to process a user equipment identification (UE ID) by 1/2 rate convolutionally encoding the UE ID to produce a code. The code is used by the base station for scrambling a high speed shared control channel (HS-SCCH). The base station is configured to transmit a wireless signal. The wireless signal provides the user equipment with payload data carried on a high speed physical downlink shared channel (HS-PDSCH). The HS-PDSCH is associated with the HS-SCCH.