Alpaslan G Savas

7808952, Oct 5, 2010

Jun 10, 2004

10/865154

Long L. Duan - San Diego CA, US
Rath Vannithamby - San Diego CA, US
Wanshi Chen - San Diego CA, US
Reza Shahidi - Stockholm, SE
Alpaslan Gence Savas - San Diego CA, US
Joakim Hulten - San Diego CA, US

Telefonaktiebolaget LM Ericsson (publ) - Stockholm

H04B 7/216

370335, 370468, 370319, 370329, 4554521, 4554522, 455450

A wireless communication network manages variable data rate communication channels using both short-term data rate adaptation and longer-term resource allocation adjustment. For example, an exemplary base station system may track the actual transmit power being used to transmit a given communication channel on a per frame basis, or faster, and use that tracked value to infer changing channel conditions, e. g. , for a given current data rate, higher power indicates poorer channel conditions and lower power indicates better channel conditions. Additionally, or alternatively, channel quality information reported by a receiving mobile station can be used. Regardless, relatively fast data rate changes can be made responsive to monitoring the channel conditions, while retaining the communication resource allocation for the channel. Over the longer term, however, the allocation itself can be changed, e. g. , increased or decreased, depending on whether the channel is being efficiently utilized.

20020147025, Oct 10, 2002

Apr 5, 2001

09/828362

Alpaslan Savas - San Diego CA, US

Telefonaktiebolaget LM Ericsson

H04B007/00

455/522000, 455/511000, 455/561000

A power control system for controlling the transmission power of a Base Station (BS) transmitter in a wireless radio network is provided. The BS transmitter transmits a signal to a Mobile Station (MS) in the wireless radio network, wherein the signal is divided into frames, each frame being further divided into Link Transmission Units (LTUs). In an exemplary embodiment the wireless radio network may be a CDMA cellular communication system. The power control systems measures the Frame Error Rate (FER) and the Eb/Nt (energy per bit to total noise density) of the signal received by the MS. In addition, the power control system measures the number of LTU errors in a frame of the signal received by the MS. The power control system then transmits a power control command from the MS to the BS transmitter based on the measured FER, number of LTU errors and Eb/Nt, instructing the BS transmitter to either increase or decrease its transmission power by a certain amount.

20040120290, Jun 24, 2004

Dec 24, 2002

10/328833

Mahesh Makhijani - San Diego CA, US
Todd Ruth - Valley Center CA, US
Alpaslan Savas - San Diego CA, US

H04B007/216

370/335000, 370/342000, 370/230000

Admission control in a wireless communication network considers power and spreading code resources as part of its admission control operations. In an exemplary embodiment, an admission controller admits new users in a manner that balances forward link transmit power and spreading code usage. More generally, network admission control maintains a desired relationship between power and code use as new users are admitted. Such control increases forward link capacity by avoiding premature exhaustion of either power or code resources. Thus, in operation, the admission controller chooses either a power-efficient or a code-efficient configuration for admitting new users, depending on the relative availability of power and code resources. Such power and code resource assessment may consider a particular communication channel, e.g., a CDMA channel, in a particular radio service area, or may consider the relative power/code usage balance among channels in multiple service areas.

20050113104, May 26, 2005

Nov 25, 2003

10/721951

Wanshi Chen - San Diego CA, US
Reza Shahidi - Kista, SE
Alpaslan Savas - San Diego CA, US
Long Duan - San Diego CA, US
Joakim Hulten - San Diego CA, US

H04Q007/20

455452200, 455450000, 455452100

A radio base station (RBS) provides dynamic rate adaptation for rate-adjustable communication channels used to transmit information to remote mobile stations based on monitoring transmit power information associated with those channels. For a given channel, the RBS tracks an average channel power on a per transmit frame basis and compares the average to first and second rate adjustment thresholds, which comparisons trigger downward or upward rate adjustments. Similar operation also may be based on averaging the power control commands returned by the mobile station, which indicate whether the channel's power as received by the mobile station is or is not sufficient with respect to a desired signal quality. This method thus provides a mechanism for rapid rate adaptation without requiring explicit rate control signaling from the mobile stations.

20050164646, Jul 28, 2005

Dec 23, 2004

11/020706

Wanshi Chen - San Diego CA, US
Alpaslan Savas - San Diego CA, US
Shiau-He Tsai - San Diego CA, US
Tao Wu - Carlsbad CA, US

H04Q007/20

455069000, 455522000

Outer loop power control (OLPC) for the reverse link considers frame information associated with at least two reverse link traffic channels, the transmit power of which is referenced to the transmit power of a reverse link pilot channel R-PICH. A traffic OLPC setpoint is determined based on information such as target frame error rate (FER) and actual frame errors associated with each traffic channel, and the traffic OLPC setpoint is converted to a R-PICH OLPC setpoint. The traffic OLPC setpoint may be calculated from weighted frame information generated by combining the received frame information. Alternatively, a traffic channel OLPC setpoint may be determined for each channel, and a weighted traffic OLPC setpoint calculated from the individual traffic channel OLPC setpoint. The setpoint adjustment may depend on received frame errors, where the power up step size is a multiple of the power down step size, the multiple calculated from target FERs.

20060233271, Oct 19, 2006

Dec 29, 2005

11/321647

Alpaslan Savas - San Diego CA, US
Wanshi Chen - San Diego CA, US
Anthony Soong - Superior CO, US
Shiau-He Tsai - San Diego CA, US

H04K 1/10

375260000

A distributed transmit diversity system based on OFDM signaling transmits a broadcast/multicast service signal from one or more first base stations and from one or more second base stations, wherein the first and second base stations transmit orthogonalized pilots. Correspondingly, a remote receiver, e.g., a mobile station, resolves the orthogonal pilots and makes independent channel estimates relative to the first and second base stations for improved diversity reception. Pilots are orthogonalized between the first and second base stations by using orthogonal space-time or space-frequency block coding. For example, in one embodiment, a first pilot tone pair is interleaved with data tones in the OFDM data blocks being transmitted from the first base stations, while an orthogonal second pilot tone pair is interleaved with data tones in the same OFDM data blocks being synchronously transmitted from the second base stations.

20060234777, Oct 19, 2006

Apr 18, 2005

11/108323

Rath Vannithamby - San Diego CA, US
Alpaslan Savas - San Diego CA, US
Young Yoon - San Diego CA, US

H04M 1/00

455562100, 455561000

A radio access network having multiple sectors comprises two or more sector transmitters serving respective sectors for transmitting data to mobile stations; a plurality of antennas, each antenna assigned to a respective sector transmitter; and a antenna management processor controlling sector antenna assignments and operative to dynamically reassign a sector antenna associated with a sector transmitter in a first sector to a sector transmitter in a second sector.

20080020790, Jan 24, 2008

Dec 20, 2006

11/613680

Wanshi Chen - San Diego CA, US
Alpaslan Savas - San Diego CA, US
Rath Vannithamby - Portland OR, US

Telefonaktiebolaget LM Ericsson (publ) - Stockholm

H04B 7/26

455503000

A method of allocating diversity codes to sectors in a mobile communication network achieves a favorable code balance for all mobile terminals a predetermined percentage of the time. The method comprises allocating diversity codes to each sector in a cluster of sectors for a first time period according to a diversity code pattern, rotating said diversity code pattern relative to said cluster, and allocating diversity codes to each sector in said cluster for a second time period according to said rotated diversity code pattern.