News Column

Researchers Submit Patent Application, "Apparatus and Method for Early Decoding of Tfci in Umts", for Approval

July 9, 2014



By a News Reporter-Staff News Editor at Telecommunications Weekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors CHIZGI, Nate (Sunnyvale, CA); Sripathi, Prashant Udupa (San Jose, CA); Saladi, Valibabu (San Diego, CA); Matin, Sharif A. (San Diego, CA); Zhang, Yi (San Diego, CA), filed on October 25, 2013, was made available online on June 26, 2014.

The patent's assignee is QUALCOMM Incorporated.

News editors obtained the following quote from the background information supplied by the inventors: "Wireless communication networks are widely deployed to provide various communication services such as telephony, video, data, messaging, broadcasts, and so on. Such networks, which are usually multiple access networks, support communications for multiple users by sharing the available network resources. One example of such a network is the UMTS Terrestrial Radio Access Network (UTRAN). The UTRAN is the radio access network (RAN) defined as a part of the Universal Mobile Telecommunications System (UMTS), a third generation (3G) mobile phone technology supported by the 3rd Generation Partnership Project (3GPP). The UMTS, which is the successor to Global System for Mobile Communications (GSM) technologies, currently supports various air interface standards, such as Wideband-Code Division Multiple Access (WCDMA), Time Division-Code Division Multiple Access (TD-CDMA), and Time Division-Synchronous Code Division Multiple Access (TD-SCDMA). The UMTS also supports enhanced 3G data communications protocols, such as High Speed Packet Access (HSPA), which provides higher data transfer speeds and capacity to associated UMTS networks. High Speed Downlink Packet Access (HSDPA) is a data service offered on the downlink of WCDMA networks.

"UMTS-based systems use various physical channels, such as a Dedicated Physical Channel (DPCH) or a Secondary Common Control Physical Channel (SCCPCH) to transport various service-related information to UEs, such as pilot signals used for channel synchronization between the base station and UEs, transmit power control (TPC) commands used by UEs to adjust its transmitter power, feedback information (FBI) used for closed loop transmission diversity, and transport format combination indicator (TFCI) that contains information about data rates, spreading factors, and other information used by UEs to decode a dedicated control channel (DCCH) and dedicated data channel (DDCH). Early and reliable decoding of the TFCI is highly desirable because it translates directly to overall DPCH BLER, and incorrect decoding of the TFCI may lead to incorrect decoding and demodulation of the DCCH and DDCH."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "The following presents a simplified summary of one or more aspects of mechanisms for performing early decoding of TFCI. This summary is not an extensive overview of all contemplated aspects of the invention, and is intended to neither identify key or critical elements of the invention nor delineate the scope of any or all aspects thereof. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

"In one aspect, a method for early decoding of TFCI in UMTS includes receiving coded TFCI bit sequence on a physical channel, determining a range of TFCI bits that contain information, performing early decoding of the received TFCI bit sequence, and limiting the search set of decoded TFCI bits to the determined range of TFCI bits.

"In one aspect, the range of TFCI bits that contain information may be determined from a code book.

"In another aspect, the range of TFCI bits that contain information is determined based on one of a communication protocol used on the physical channel, a data encoding scheme used on the physical channel, and call types including different numbers of transport channels.

"In another aspect, early decoding of the TFCI bit sequence includes performing Fast Hadamard Transform (FHT) on the coded TFCI bit sequence.

"In another aspect, the method further includes determining whether the TFCI bit sequence is correctly decoded and, when the TFCI bit sequence is correctly decoded, performing early decoding of the physical channel.

"In another example aspect, the method further includes determining whether the TFCI bit sequence is correctly decoded and, when the TFCI bit sequence is correctly decoded, entering a low power mode by a user equipment without decoding the physical channel.

"In one example aspect, the physical channel includes one of a dedicated physical channel (DPCH) or a Secondary Common Control Physical Channel (SCCPCH).

"In one example aspect, an apparatus for early decoding of TFCI in UMTS includes at least one processor configured to receive coded TFCI bit sequence on a physical channel, determine a range of TFCI bits that contain information, perform early decoding of the received TFCI bit sequence, and limit a search set of decoded TFCI bits to the determined range of TFCI bits.

"In one aspect, a method for early decoding of TFCI in UMTS includes receiving coded TFCI bit sequence on a physical channel, performing early decoding of the received TFCI bit sequence, sorting the decoded TFCI bit sequences based on strength of the decoded TFCI bit sequence, and selecting one or more strongest TFCI bit sequences as early decoded TFCI candidates.

"In one example aspect, an apparatus for early decoding of TFCI in UMTS includes at least one processor configured to receive coded TFCI bit sequence on a physical channel, perform early decoding of the received TFCI bit sequence, sort the decoded TFCI bit sequences based on strength of the decoded TFCI bit sequence, and select one or more strongest TFCI bit sequences as early decoded TFCI candidates.

"To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS

"The disclosed aspects will hereinafter be described in conjunction with the appended drawings, provided to illustrate and not to limit the disclosed aspects, wherein like designations denote like elements, and in which:

"FIG. 1 illustrates one example implementation of a WCDMA UMTS receiver.

"FIG. 2 illustrates one example implementation of an early TFCI decoding module of the WCDMA receiver.

"FIGS. 3A and 3B are example methodologies of early TFCI decoding according to different aspects.

"FIG. 4 is a block diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.

"FIG. 5 is a block diagram conceptually illustrating an example of a telecommunications system.

"FIG. 6 is a conceptual diagram illustrating an example of an access network.

"FIG. 7 is a block diagram conceptually illustrating an example of a Node B in communication with a UE in a telecommunications system."

For additional information on this patent application, see: CHIZGI, Nate; Sripathi, Prashant Udupa; Saladi, Valibabu; Matin, Sharif A.; Zhang, Yi. Apparatus and Method for Early Decoding of Tfci in Umts. Filed October 25, 2013 and posted June 26, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4525&p=91&f=G&l=50&d=PG01&S1=20140619.PD.&OS=PD/20140619&RS=PD/20140619

Keywords for this news article include: Telecommunications, QUALCOMM Incorporated.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Telecommunications Weekly


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters