News Column

"Radio Communication System, Base Station, and Radio Communication Method" in Patent Application Approval Process

August 26, 2014



By a News Reporter-Staff News Editor at China Weekly News -- A patent application by the inventor EZAKI, Takato (Yokohama, JP), filed on April 10, 2014, was made available online on August 14, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to Fujitsu Limited.

The following quote was obtained by the news editors from the background information supplied by the inventors: "With the development of radio communication technology, a changeover has been made to a radio communication network with higher communication speed. For example, a migration from a third generation (3G) network to a long term evolution (LTE) network has been rapidly implemented in recent years. The LTE performs resource assignment by time sharing. This may result in narrow coverage (communicable range) of voice calling as compared with a system in which resources are uniformly assigned over time, such as wideband code division multiple access (W-CDMA). To solve this disadvantage, the LTE employs transmission time interval (TTI) bundling. The TTI bundling regards a plurality of successive TTIs used in transmission of audio data as a single TTI to increase energy density and enables coverage equivalent to the W-CDMA. Patent Document 1: Japanese Laid-open Patent Publication No. 2007-151146 Patent Document 2: Japanese Laid-open Patent Publication No. 2011-049987 Patent Document 3: International Publication Pamphlet No. WO 2006/085359 Patent Document 4: Japanese National Publication of International Patent Application No. 2010-534997 Non Patent Document 1: R1-074990, On the Need for VoIP Coverage Enhancement for the E-UTRA UL, Alcatel-Lucent Non patent Document 2: TS36.213, Evolved Universal Terrestrial Radio Access (EUTRA); 'Physical layer procedures', 3GPP Non patent Document 3: TS36.321, Evolved Universal Terrestrial Radio Access (EUTRA); 'Medium Access Control (MAC) protocol specification', 3GPP

"The TTI bundling, however, has the following disadvantages. The use of the TTI bundling increases transmission opportunities of audio data to a base station from a mobile station positioned at the edge of the cell of the base station. The transmission power of the mobile station causes interference to neighboring other cells. This interference is typically prominent at a cell edge where the transmission power of the mobile station is large. As a result, the interference in a radio communication system to which the TTI bundling is applied increases particularly at a cell edge as compared with the case where no TTI bundling is applied. This reduces the capacity efficiency of the whole system and the throughput between the base station and the mobile station."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventor's summary information for this patent application: "To solve the above problem and attain the object, a radio communication system disclosed in this application, according to an aspect, includes a first base station that communicates with a mobile station and a second base station. The first base station includes a transmitting unit. The transmitting unit transmits a result of resource assignment relative to the mobile station to the second base station. The second base station includes a receiving unit and a controller. The receiving unit receives the result of the resource assignment performed by the first base station and transmitted by the transmitting unit. The controller identifies a resource suffering interference from the mobile station among resources assignable by the second base station based on the result of the resource assignment and stops assignment of the resource relative to the mobile station.

"The object and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the claims.

"It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention.

BRIEF DESCRIPTION OF DRAWINGS

"FIG. 1 is a schematic illustrating the configuration of a radio communication system;

"FIG. 2 is a block diagram illustrating the functional configuration of base stations 10, 20 according to first and second embodiments;

"FIG. 3 is a block diagram illustrating the hardware configuration of the base stations 10, 20;

"FIG. 4 is a flowchart for explaining cell edge determination processing executed by the base station 10;

"FIG. 5 is a flowchart for explaining the operation of the base station 10;

"FIG. 6 is a graph illustrating the state of radio resources allocated by audio scheduling processing;

"FIG. 7 is a flowchart for explaining the audio scheduling processing executed by the base station 10 according to the first embodiment;

"FIG. 8 is a table listing an example of the execution result of the audio scheduling processing;

"FIG. 9 is a flowchart for explaining radio resource allocation processing executed by the base station 20 according to the first embodiment;

"FIG. 10 is a flowchart for explaining base station determination processing for interference reduction, executed by the base station 10 according to a first modification;

"FIG. 11 is a flowchart for explaining interference reduction feasibility determination processing executed by the base station 20 according to a second modification;

"FIG. 12 is a flowchart for explaining marking processing of a target resource for interference reduction, executed by the base station 20 according to the second embodiment;

"FIG. 13 is a flowchart for explaining assignment processing of the target resource for interference reduction to another mobile station, executed by the base station 20 according to the second embodiment;

"FIG. 14 is a block diagram illustrating the functional configuration of the base station 10 according to a third embodiment;

"FIG. 15 is a block diagram illustrating the configuration of a decoding unit of the base station 10 according to the third embodiment; and

"FIG. 16 is a graph illustrating a situation in which the reception timings of demodulated signals delay, in the base station 10 according to the third embodiment."

URL and more information on this patent application, see: EZAKI, Takato. Radio Communication System, Base Station, and Radio Communication Method. Filed April 10, 2014 and posted August 14, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=2629&p=53&f=G&l=50&d=PG01&S1=20140807.PD.&OS=PD/20140807&RS=PD/20140807

Keywords for this news article include: Asia, Fujitsu Limited.

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: China Weekly News


Story Tools






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