Qualcomm Incorporated

Other

Messay Amerga

Roland Reinhard Rick

Ivan Jesus Fernandez-Corbaton

Jeremy M Stein

Parvathanathan Subrahmanya

Bhupesh Manoharlal Umatt

Ashok Bhatia

Nitin Kasturi

Borislav Ristic

Brian Dong

Serguei A Glazko

Chih-Ping Hsu

Prashant Udupa Sripathi

Vineet Mittal

Xiaoming Zhu

Ravi Gopalan

Gurdeep Singh

Sudhir Halbhavi

Wei Zhang

Supratik Bhattacharjee

Sharif Ahsanul Matin

Ning He

Krishna Chaitanya Mukkera

Mohammad J Al-Saleh

Alexei Yurievitch Gorokhov

Iyab Issam Sakhnini

Raghu Narayan Challa

Brian Clarke Banister

Sitaramanjaneyulu Kanamarlapudi

Amir Aminzadeh Gohari

Edward Harrison Teague

Douglas Neal Rowitch

Je Woo Kim

Da-shan Shiu

James A Hutchison, Iv

Andrew Sendonaris

Christopher Patrick

Saed G Younis

Jeremy H Lin

Baaziz Achour

Thomas Wilborn

Christopher Cooper Riddle

Robbin D Hughes

Gwain Bayley

Abhay Arvind Joshi

Subramanya P Rao

Arthur James Neufeld

Parag Mohan Kanade

Alex Kuang-Hsuan Tu

Michael Kevin Spartz

Kiran Chikkappa

Vijay Marwah

Vivek Chawla

Anil Rao

Wen Jing New

Sagar Shah

Jiangxin Chen

Hyukjun Oh

Vikas Nagpal

Chalapathi Rao Emani

Thejaswi Bharadwaj Madapushi Sheshadri

Mark D Levin

Maheedhar Gollamudi

Venkata Srihari Inampudi

Deepali Garg

Thejaswi Bharadwaj Madapushi Shesha

Ivan Fernandez-Corbaton

Chandra Kumar

Sudarshan Keshava

Rohit Malhotra

Parvathanathan Subrahamanya

Roland c/o Qualcomm Inc Rick

Ivan J c/o Qualcomm Inc Fernandez-Corbaton

Aspects of the present disclosure provide apparatus and techniques that may be applied in systems that may help enable efficient communication between a base station (BS) and certain devices, such as wearable devices and/or machine type communication (MTC) user equipments (UEs), having a single receiver (RX) for long term evolution (LTE). An exemplary method, performed by a BS, generally includes receiving, from a UE, an indication of a category of the UE, wherein the category of the UE indicates at least one of: a maximum throughput supported by the UE or a number of layers supported by the UE; assuming a number of receivers at the UE based on the category of the UE; determining one or more transmit parameters based on the number of receivers of the UE; and communicating with the UE according to the one or more transmit parameters.

Link budget enhancements for single receiver devices

Methods and apparatus for processing data received at a user equipment comprises determining a protocol data unit (PDU)-specific Layer 1 decoding metric of a Layer 1 decoded PDU. The methods and apparatus further comprises determining whether to perform a Layer 2 decoding of the Layer 1 decoded PDU based on the PDU-specific Layer 1 decoding metric.

Apparatus and methods of processing a protocol data unit

Disclosed are methods and apparatus for rejecting unreliable downlink (DL) transmit power control (TPC) commands in windup mode. In one aspect, the method includes receiving by a user equipment (UE) a plurality of DLTPC commands from a base station, analyzing on one or more transmitted uplink (UL) TPC commands, detecting a windup mode based on the one or more DLTPC and ULTPC commands, and rejecting one or more DLTPC down commands in the windup mode.

Methods and apparatus for DLTPC rejection in downlink windup mode

Disclosed are methods and apparatus for rejecting unreliable downlink (DL) transmit power control (TPC) commands based on signal-to-interference-ratio estimates (SIRE). The method includes receiving by a user equipment (UE) a DL transmit power control (TPC) command from a base station; calculating a signal-to-interference ratio estimate (SIRE) for the DL channel; determining a scaling factor for a DLTPC rejection threshold based on the DL channel SIRE; adjusting the DLTPC rejection threshold based on the determined scaling factor; and rejecting or accepting the DLTPC command based on the adjusted DLTPC rejection threshold.

Methods and apparatus for sire-based DLTPC rejection

The disclosure is directed to techniques for performing service signal searches with reduced power consumption when a wireless communication device is operating out of service. The techniques include placing the wireless communication device in a 'deep sleep' mode when the wireless communication device is not in service. When operating in the deep sleep mode, the wireless communication device reduces power consumption by not looking for paging signals or searching for service signals. The wireless communication device then may periodically enter a wake-up period during which power consumption is increased to perform signal searches in one or more frequency bands. The wireless communication device returns to the deep sleep mode when the signal searches are unsuccessful.

Sleep mode for wireless communication device during out of service operation

A method and apparatus for reducing frequency space from code space search is disclosed in a wireless network. The method and apparatus reduces the frequency space without compromising the probability of detection, so that user equipment can expedite system acquisition and reduce power consumption. To reduce the frequency space, the described aspects note that the power spectral density of the WCDMA signal is essentially flat within the channel bandwidth. By capturing in-phase quadrature samples and doing frequency domain analysis of the signal in bandwidth around the center frequency, to the described aspects can eliminate some channels from the WCDMA code space search during frequency scan.

Method and apparatus for reducing frequency space from frequency search

Cell timing is detected by first trying to detect a target handover cell through detecting a primary synchronization channel (P-SCH) followed by a common pilot channel (CPICH). If that fails, N number of retrials is performed using a full-window search on the CPICH. The full-window CPICH search is performed blindly, without any slot timing information from the P-SCH. Performance is improved while maintaining the benefits of faster acquisition methods in good channel conditions. The full-window search is more time consuming, but takes advantage of the stronger CPICH transmission. In good channel conditions, a mobile device can proceed quickly with the normal method of timing acquisition. With failure, the mobile device can switch to the longer search which has a higher probability of successfully completing the hard handover procedure. The overall effect is a higher success rate of hard handovers without a uniform increase of time spent in cell timing acquisition.

Cell timing acquisition in a W-CDMA hard handover

A rake receiver finger assignor is configured to assign a rake receiver finger to a time offset between identified signal path time offsets in accordance with a concentration of identified signal paths from a transmitter to a rake receiver. In accordance with the exemplary embodiment, a number of identified signal paths having time offsets within a time window are observed to determine the concentration of signal paths identified by a path searcher. If the number of identified signal paths indicates a concentrated distribution of signal paths such as during a fat path condition, at least one rake finger is assigned between at a time offset between two identified signal paths.

Rake receiver finger assignment based on signal path concentration

Techniques for searching neighbor cells within a fixed time duration are disclosed. In one embodiment, cells in a monitored list are ranked. A first subset of the ranked cells are searched during each cycle in a series of cycles, and a subset of the remainder of ranked cells is searched in each cycle, the subset varying from cycle to cycle. In another embodiment, the ranking and searching of a subset of the ranked list of cells is performed when the number of monitored cells is greater than a pre-determined search number. In yet another embodiment, the complete list of monitored cells is searched when the number of monitored cells is less than or equal to a pre-determined search number. In various embodiments, the searching comprises one or more of intra-frequency, inter-frequency, or inter-RAT searching. Various other embodiments are also presented. Benefits include allowing prescribed levels of intra-frequency, inter-frequency and/or inter-RAT search to be performed allowing for improved base station selection and therefore improved performance and system capacity.

Intra-frequency, inter-frequency and inter-radio access technology searching for neighbor cells within a fixed time duration

Techniques for efficiently performing system search to obtain service from a wireless system as quickly as possible are described. A terminal initially looks for service from a first (e.g., W-CDMA) system. The terminal identifies network(s) in the first system from which service was received in the past and performs acquisition on each network to look for service. If service is not found for the first system, then the terminal performs a search for a second (e.g., GSM) system. If service is found on the second system, then the terminal obtains service from the second system and avoids a frequency scan for the first system. Otherwise, the terminal performs a frequency scan for the first system using the search results for the second system. The terminal may obtain a list of RF channels detected for the second system and may omit these RF channels and possibly some other RF channels around these RF channels from the frequency scan.

System search to detect for a wireless communication network in a crowded frequency band

A terminal communicates with a first wireless network and obtains a list of cells in a second wireless network to measure. The terminal operates in a compressed mode and receives multiple transmission gap pattern sequences for different measurement purposes, e.g., RSSI measurements, BSIC identification, and BSIC re-confirmation. The terminal utilizes each transmission gap for its designated purpose or an alternate purpose. For each transmission gap, the designated purpose for the transmission gap is ascertained, and whether the transmission gap is usable for an alternate purpose is also determined based on at least one criterion. The transmission gap is used for the alternate purpose if the at least one criterion is satisfied and is used for the designated purpose otherwise. For example, a transmission gap designated for RSSI measurement may be used for BSIC identification, a transmission gap designed for BSIC identification or BSIC re-confirmation may be used for RSSI measurement, and so on.

Efficient utilization of transmission gaps for cell measurements

Methods and apparatus for out of service processing with varied behaviors. In an aspect, a method is provided for service acquisition. The method includes determining one or more conditions, wherein each condition is associated with at least one weight, detecting whether an out-of-service event has occurred, and if an out-of-service event is detected: identifying selected conditions and associated weights, and processing the associated weights to determine service acquisition 'on' and 'off' times. In an aspect, an apparatus includes condition logic configured to determine one or more conditions, wherein each condition is associated with at least one weight, and processing logic configured to detect whether an out-of-service event has occurred, and if an out-of-service event is detected, to identify selected conditions and associated weights, and process the associated weights to determine service acquisition &#x201c;on&#x201d; and &#x201c;off&#x201d; times.

Methods and apparatus for out of service processing with varied behaviors

Techniques for intra-frequency searching in the presence of frequency gaps are disclosed. In one embodiment, a search is scheduled and frequency switches are suppressed during the scheduled search. In another embodiment, a search is scheduled in between anticipated frequency gaps. In yet another embodiment, a timer is deployed, the expiration of which indicates a search is to be scheduled. In yet another embodiment, a timer is deployed, the expiration of which indicates a search is to be scheduled and frequency switches are suppressed during the scheduled search. Various other embodiments are also presented. Benefits include allowing prescribed levels of intra-frequency and inter-frequency search to be performed which allows for improved base station selection and therefore improved performance and system capacity.

Intra-frequency searching in the presence of frequency gaps

A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements includes an earliest time of arrival, providing multiple independent measurements for each of the pilot signals. For each cellular base station, a representative measurement is calculated responsive to the independent measurements, which is used to determine position of the mobile station using an AFLT algorithm and/or in conjunction with a GPS algorithm. In some embodiments, the data measurements for each pilot signal further include an RMSE estimate and time of measurement for each time of arrival, and an energy measurement for all resolvable paths. If the mobile station comprises a cell phone, a cell search list and a GPS search list may be provided by a cell base station.

Position determination system that uses A cellular communication system

An access terminal () reacquires a system frame number (SFN) when a difference between a continuous counter elapsed time () and a calculated elapsed time () exceeds a threshold. The continuous counter elapsed time () is generated by a continuous counter () remaining active during a sleep state of the access terminal () and the calculated elapsed time () is based on a SFN derived from a counter value generated by a discontinuous counter () that is deactivated during the sleep state. In one aspect, the continuous counter () may be clocked by a continuous clock () during a sleep mode and the discontinuous counter () may be clocked by a faster clock () that is deactivated during the sleep mode. During reactivation after the sleep mode, the discontinuous counter () is set, at the counter set time, to a reset counter value () corresponding to an SFN indicated by the continuous counter ().

System frame number (SFN) evaluator

Growing community of inventors

San Diego, CA, United States of America

Messay Amerga