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High-speed network of independently linked nodes

Patent Number: RE43163
Publication Date: 2012-02-07
Inventors: Andrews, Jock; Christensen, Richard H.; Miller, Craig A.; Peppin, Kevin J.; Pugina, Marcio; Anderson, Keith R.; Veech, Jason S.; Erdman, Larry G.

A method of operating a network is beneficially conducted on a municipality or neighborhood level. The method in disclosed embodiments comprises installing a digital communications network within a limited selected geographical region. The network is formed from a high speed backbone and a plurality of nodes branching outward from the high speed backbone. A plurality of communicating stations are connected to the network and users at each communicating station subscribe to communicate over ...

Acknowledging data transmissions in the presence of multiple shared-communications channels

Patent Number: RE43151
Publication Date: 2012-01-31
Inventors: Fischer, Michael Andrew; Wentink, Maarten Menzo

A technique is disclosed that improves the efficiency of transmitting data over multiple shared-communications channels without some of the costs and disadvantages associated with techniques in the prior art. In particular, and in accordance with the illustrative embodiment of the present invention, a data frame is simultaneously transmitted across a plurality of channels, but the acknowledgment frame to the data frame is not. Instead, a plurality of redundant acknowledgment frames are ...

Method for transmitting data packets on carrier frequency with linear variation and transmitter implementing this method

Patent Number: RE43128
Publication Date: 2012-01-24
Inventors: Hethuin, Serge; Ramel, Louis

A method for transmitting data packets having a heading followed by a data field. The data of the field is transmitted by groups of symbols. According to the OFDM technique, subcarriers modulated by the groups are generated. A frequency modulation of a carrier signal delivered by a linear ramp generator is produced with a set of modulated subcarriers. When the signal is received, mixing with a linear ramp results in subcarriers which are separated and then demodulated for supplying data. ...

Event-based multichannel direct link

Patent Number: RE43127
Publication Date: 2012-01-24
Inventor: Wentink, Menzo

Disclosed herein are exemplary techniques for the communication of information in a wireless system by using multiple wireless channels. A direct link between two or more wireless devices may be established by performing a direct link setup between two or more wireless devices using an access point, where the direct link setup is conducted over a base channel and the direct link is established on a parallel channel. The two or more wireless devices may switch to the parallel channel and use ...

Pipelined maximal-sized matching cell dispatch scheduling

Patent Number: RE43110
Publication Date: 2012-01-17
Inventors: Oki, Eiji; Rojas-Cessa, Roberto; Chao, Hung-Hsiang Jonathan

A Pipelined-based Maximal-sized Matching (PMM) scheduling approach for input-buffered switches relaxes the timing constraint for arbitration with a maximal matching scheme. In the PMM approach, arbitration may operate in a pipelined manner. Each subscheduler is allowed to take more than one time slot for its matching. Every time slot, one of them provides the matching result. The subscheduler can adopt a pre-existing efficient maximal matching algorithm such as iSLIP and DRRM. PMM maximizes ...

Method to negotiate consumed power versus medium occupancy time in MIMO based WLAN systems using admission control

Patent Number: RE43109
Publication Date: 2012-01-17
Inventors: Kowalski, John M.; Kandala, Srinivas

A method of selectively providing MIMO transmission/reception in a WLAN system includes using a TSPEC reservation and signaling mechanism to instantiate and tear down, dynamically, multi-channel operation in a WLAN; providing an inference algorithm to determine the minimum number of channels required to establish a TSPEC using a MIMO WLAN system; providing specific channel parameters as parameters to be negotiated in the TSPEC; providing frame exchange sequences to be used in Enhanced ...

Transmission method for packet data and a network element

Patent Number: RE43108
Publication Date: 2012-01-17
Inventors: Sarkkinen, Sinikka; Isokangas, Jari; Virtanen, Jukka

In packet data transmission method, a packet data connection is indicated with a connection identifier and the destination of the packet data connection is indicated with a destination identifier. A destination identifier is involved in the initialization of a transmission queue, at least one connection identifier is related to each transmission queue, and a set of proper connection identifiers is the union of the connection identifiers related to the initialized transmission queues. A data ...

Method of allocating transmission channels to a mobile station, in particular in duplex mode, in a mobile packet-mode telecommunications network

Patent Number: RE43107
Publication Date: 2012-01-17
Inventor: Dupuy, Pierre

A method of allocating data transmission channels to a mobile station, in particular in half-duplex mode, in a mobile telecommunications network of the type using packet mode and having multiple access by multiplexing transmission channels, in which method the transmission channels allocated to a mobile station, respectively in a “down” direction from the network to the mobile station, and in an “up” direction from the mobile station to the network, can change at each “allocation ...

Multiplexing apparatus and method

Patent Number: 8111721
Publication Date: 2012-02-07
Inventor: Aoki, Keisuke

A multiplexing system (10) is provided which includes a plurality of encoders (12-15) which generates elementary streams, respectively, CPU (16), multiplexer (17), instruction memory (18), and a data memory (19) which stores a plurality of elementary data to be multiplexed. Each of the encoders (12-15) divides elementary data into units, and stores the data into the data memory (19). The CPU (16) generates, for ...

Method and apparatus to indicate maximum scheduling delay for jitter buffer implementations

Patent Number: 8111720
Publication Date: 2012-02-07
Inventor: Synnergren, Per

In VoIP systems, there is a tradeoff between reducing number of lost packets and end-to-end delay when dealing with jitters. Increasing the jitter buffer space on a mobile wireless terminal reduces the likelihood of lost packets but increases the end-to-end delay. Decreasing the jitter buffer space shortens the end-to-end delay, but there is a greater likelihood of retransmissions and dropped packets. Optimum solution can be arrived at if the jitter buffer space on the mobile wireless ...

Transmission system

Patent Number: 8111719
Publication Date: 2012-02-07
Inventor: Asano, Hiroyuki

A transmission system includes: a transmission-side device that has a transmission-side clock generation unit that generates a first clock signal on the basis of a reference clock signal; a clock extraction unit that removes a data clock signal superimposed with transmission data to a reception-side device; a clock difference acquisition unit that determines a difference between the first clock signal and the data clock signal; and a packet generation unit that packetizes the information on ...

Communication system and method that reduces interference

Patent Number: 8111718
Publication Date: 2012-02-07
Inventors: Habib, Ahsan; Sankaranaraynan, Pallavur

A method of operating a communication system is disclosed. The method comprises acquiring a first frequency band for a first device to wireles sly communicate a first data stream. The center frequency of the first frequency band is f₁. A second frequency band for a second device to wirelessly communicate a second data stream is acquired. The center frequency of the second frequency band is f₂. A third frequency band that is below the first frequency band and is ...

Flexible tributary interface

Patent Number: 8111717
Publication Date: 2012-02-07
Inventor: Giannakopoulos, Dimitrios

A system and method are provided for transporting Plesiochronous Digital Hierarchy (PDH) tributaries. The method accepts a plurality of PDH tributaries; generates a serial data stream of interleaved PDH tributaries; generates a serial control stream of signals for recovering the PDH tributaries; and, generates a clock signal for timing the data and control streams. The serial data stream of interleaved PDH tributaries is loaded into the payload of a data frame structure. Likewise, the ...

Method and apparatus for formatting data signals in a digital audio broadcasting system

Patent Number: 8111716
Publication Date: 2012-02-07
Inventors: Iannuzzelli, Russell; Mattson, Stephen Douglas

A data unit for transmitting data in a digital broadcasting system includes a first payload field, and a first byte code field having a value indicating an offset of data in the first payload field with respect to an absent value. A method for formatting the data unit includes: providing data for a payload field for a data unit, wherein the data includes an absent byte value, determining an offset between an absent byte value and other data in the payload field, shifting the data in the ...

Method and apparatus for transferring a frame of data from a first network to a second network

Patent Number: 8111715
Publication Date: 2012-02-07
Inventors: Meyouhas, Yosef; Mondaeev, Maxim; Pannell, Donald

A method and apparatus for transferring a frame of data from a first network to a second network. The method includes adding a first steering header to a frame of data received by a first port that is destined for the second network. The method further includes selecting a first receive queue of a plurality of receive queues based on one or more of (i) a database number, (ii) a priority bit, and (iii) a source port identifier of the first steering header; loading the frame of data into the ...

Method and arrangement relating to admission control of broadband services

Patent Number: 8111714
Publication Date: 2012-02-07
Inventors: Melsen, Torben; Forsman, Mats; Thyni, Tomas

A broadband access node and method for controlling access by end users to services over communication channels. A resource admission control mechanism includes a first memory for storing information about a currently available transmission capacity on an uplink channel, a second memory for storing information about a currently available transmission capacity on a downlink subscriber line; and a third memory for storing information about a currently available maximum performance of the ...

Telecommunication and multimedia management method and apparatus

Patent Number: 8111713
Publication Date: 2012-02-07
Inventors: Katis, Thomas E.; Panttaja, James T.; Panttaja, Mary G.; Ranney, Matthew J.

An improved communication apparatus for transmitting media between a sending node and a receiving node during a conversation. When network bandwidth is insufficient to transmit a full bit rate representation of time-sensitive media, the sending node generates and transmits a reduced bit rate representation of the media for the purpose of increasing the ability of the recipient to review the media upon receipt and continue the conversation in the real-time mode when the bandwidth on the ...

Apparatus, method, system and program for communication

Patent Number: 8111712
Publication Date: 2012-02-07
Inventors: Mutikainen, Jari; Poikselkä, Miikka Juhana

Embodiments provide an apparatus, method, and storage medium wherein a communication identifier of a session or part of a session is provided in a package or added to a message. An apparatus may check, based on the communication identifier of package or the received communication identifier, whether or not a service indicated by the communication identifier is supported. A decision of transferring the service may be based on the communication ...

Multi-channel ranging for a cable modem

Patent Number: 8111711
Publication Date: 2012-02-07
Inventors: Sowinski, Pawel; Li, DeFu; Goguen, Robert; Liu, Tong; Bernstein, Alon

In one example, a Cable Modem Termination System (CMTS) sends first bandwidth allocation messages to a first upstream transmit interface on a cable modem and send second bandwidth allocation messages to a second upstream transmit interface on the cable modem. The bandwidth allocation messages indicate transmit windows for the cable modem to range over the interfaces. The transmit windows included in the first bandwidth allocation messages are spaced based on receipt of ranging requests from ...

Method and apparatus for receiving feedback corresponding to multicast broadcast service

Patent Number: 8111710
Publication Date: 2012-02-07
Inventor: Cheng, Ray-Guang

The invention is directed to a method for receiving a feedback for at least a multicast broadcast service flow transmitting to a plurality of subscriber stations. The method comprises steps of assigning a plurality of code division multiple access (CDMA) codes to a feedback corresponding to the multicast broadcast service flow and then performing an allocation process for allocating a feedback channel for the subscriber stations. Thereafter, an announcement process is performed to announce ...

MIMO wireless communication system

Patent Number: 8111709
Publication Date: 2012-02-07
Inventors: Hunukumbure, Mythri; Hart, Michael John Beems

A wireless communication method in a MIMO OFDMA system in which users in each of multiple adjacent cells are served by a base station of the cell, the base station having a transmission link to each user in the cell on a respective MIMO channel. The method involves the base station (BS_A) of a first cell carrying out the following steps: receiving, from a base station (BS_B) or user (B) of another cell, one or more requests for reduction of interference which it is ...

Distributed processing system, method of distributed processing, terminals and storage media

Patent Number: 8111708
Publication Date: 2012-02-07
Inventor: Omino, Takayuki

A distributed processing system includes a first information processing device, two or more second information processing devices connected with the first information processing device via a first network, and the second information processing devices being connected with each other via a second network, wherein the first information processing device includes an input division unit that generates divided input data pieces by dividing an input data set, and a divided input distribution unit ...

Compression mechanisms for control plane—data plane processing architectures

Patent Number: 8111707
Publication Date: 2012-02-07
Inventors: Okholm, Jon Eric; Riddle, Guy

Methods, apparatuses, and systems directed to efficient compression processing in system architectures including a control plane and a data plane. Particular implementations feature integration of compression operations and mode selection with a beltway mechanism that takes advantage of atomic locking mechanisms supported by certain classes of hardware processors to handle the tasks that require atomic access to data structures while also reducing the overhead associated with these atomic ...

Premises gateway device

Patent Number: 8111706
Publication Date: 2012-02-07
Inventors: Hasegawa, Makoto; Otani, Atsushi; Tsuzuki, Hisa

In a premises gateway device that performs encryption or decryption under the IPsec, the throughput of a processor is varied depending on a type of data to be treated in order to realize reduction in power consumption. In the premises gateway device to which a telephone, PCs, and a home appliance that are pieces of home network equipment are connected and which transmits or receives data using an ISP and an IPsec tunnel via an ONU, an OLT, and a carrier network, relevant home network ...

Providing access-network information to an IP-core portion of a wireless telecommunication network

Patent Number: 8111705
Publication Date: 2012-02-07
Inventors: Bartlett, Roger Danforth; Mabee, Kent DeLancy; Hayne, Kristen Ann

Systems, products, and methods are disclosed for enabling an action to take place based on data-usage characteristics associated with a mobile device. This can include receiving a request from the mobile device to receive an IP address (which request is communicated through a base transceiver station), adding to the registration request an identifier that identifies the BTS, and communicating the modified registration request to an IP-address-allocation device that reserves the IP address ...

Multiple compression techniques for packetized information

Patent Number: 8111704
Publication Date: 2012-02-07
Inventors: Palomino, Jesus; Sharma, Debendra Das; Singhal, Abhishek; Rubio, Mario A.

In one embodiment, the present invention includes a method for comparing a packet header to a stored packet header, generating a comparison vector based on the comparison, and transmitting the packet from the transmitter without the packet header if the packet header and the stored packet header match. A data portion of the packet may be compressed and transmitted using a different compression technique. Other embodiments are described and ...

IP telephone repeater, IP telephone repeating system and IP telephone repeating method

Patent Number: 8111703
Publication Date: 2012-02-07
Inventor: Nemoto, Hiroyuki

An IP telephone repeater includes a first communication portion connected to an internet IP telephone network, a second communication portion connected to a local area IP telephone network, and a call controller which supplies, upon receipt of an incoming call via the first communication portion from the internet IP telephone network, a jingle signal to the incoming call and to a plurality of terminals connected to the second communication portion, and which supplies a holding tone to the ...

Configuring route properties for use in transport tree building

Patent Number: 8111702
Publication Date: 2012-02-07
Inventors: Eckert, Toerless; Wijnands, Ijsbrand; Boers, Arjen; Previdi, Stefano

A mechanism is provided by which a transport tree identifier can be generated comprising both an opaque field, containing information that cannot be interpreted by core routers, and a non-opaque field, containing information that can be interpreted by core routers. The transport tree identifier is then used in the process of building a transport tree across a transport network. A transport network egress router can receive a request to join a multicast datastream from a downstream node ...

System and method for prioritizing and providing credits for data packet communication over a packet network

Patent Number: 8111701
Publication Date: 2012-02-07
Inventors: Wiley, William L.; Bugenhagen, Michael K.

A system and method for prioritizing data packets being communicated over a packet network may include receiving a data packet at a network node. The data packet may include an origination network address, a destination network address, and a data field. A determination may be made as to whether at least one of the origination and destination network addresses is a priority network address. The data field of the data packet may be set to a priority value if at least one of the origination ...

Computer-readable recording medium storing packet identification program, packet identification method, and packet identification device

Patent Number: 8111700
Publication Date: 2012-02-07
Inventors: Iwakura, Hirokazu; Yokoyama, Ken

A packet identification device has a reception unit that successively receives packets. The device has an obtaining unit that obtains, every time a packet is received, an interval of reception times between the received packet and a packet received immediately before the received packet, in the same connection as that of the received packet. The device has an identification unit that identifies the received packet as a packet containing a forefront segment of a plurality of segments ...

Base station access system and base station data transmission method

Patent Number: 8111699
Publication Date: 2012-02-07
Inventor: Hu, Qiang

A base station access system and a base station data transmission method. The system includes a base station and a broadband access point. An embodiment of base station data transmission method includes: a base station assigns sequence number identifications to uplink data packets, the base station sends the uplink data packets with the sequence number identifications out via multiple xDSL links; by the broadband access point arranges the uplink data packets according to the sequence number ...

Method of performing a layer operation in a communications network

Patent Number: 8111698
Publication Date: 2012-02-07
Inventors: Narlikar, Girija; Bosch, Peter; Mullender, Sape

In an embodiment of the present invention, a scheduling operation is performed at a lower layer based on upper layer information. In another embodiment of the present invention, an action is performed at an upper layer based on received lower layer information. Also, a scheduling operation may be performed on at least one upper layer data packet at a lower layer based on a lower layer analysis of the upper layer data ...

Methods and apparatus for packet classification based on multiple conditions

Patent Number: 8111697
Publication Date: 2012-02-07
Inventors: Panwar, Ramesh; Huang, Jianhui; Goel, Deepak; Jagannadhan, Srinivasan

In one embodiment, a method includes classifying a data packet received at a switch fabric, selecting an action descriptor in response to the classifying, and processing an action defined in the action descriptor. The classifying is based on a primary classification condition and first portion of the data packet. The action descriptor is associated with the primary classification condition. The processing includes determining whether a secondary classification condition is satisfied by a ...

Method to improve the performance of a computer network

Patent Number: 8111696
Publication Date: 2012-02-07
Inventors: Lemire, Steven Gerard; Nguyen, Vuong Cao; Oteyza, Raul Bersamin; Zheng, Jeff Junwei

A method is disclosed for indicating a status of a transfer of data from a first device to a second device over a network. In one embodiment, the data includes one or more data frames. Each frame includes a header having one or more bits. The method includes setting a last bit of the one or more bits in the header of a last frame of the one or more data frames to a first value if the status of the transfer of data is good and setting the value of the last bit of the last data frame to a ...

Resource admission control for customer triggered and network triggered reservation requests

Patent Number: 8111695
Publication Date: 2012-02-07
Inventors: De Cnodder, Stefaan Jozef; Van Ewijk, Adrianus Johannes

Customer triggered resource reservation requests (131) are granted or refused in an access node (104) on the basis of available resources on downlinks (102) between the access node (104) and customer premises, and eventually uplinks (105) between the access node (104) and an aggregation network (106). Network triggered resource reservation requests (121) are granted or refused in a central resource admission control device (108) ...

Implicit signaling for split-toi for service guide

Patent Number: 8111694
Publication Date: 2012-02-07
Inventors: Pohjolainen, Topi; Paila, Toni; Jansky, Martin; Poikela, Jani

The invention provides an efficient transportation of ESG fragments to a mobile device through the formation of containers. In this sense, a container comprises at least one ESG fragment, but may contain a plurality of fragments. A fragment may be also carried in more than one container. Aspects of the present invention utilize a simple and extensible header structure apart from the fragments independent of the type and format of the individual fragments. In further embodiments, compression ...

Broadcast messaging in wireless communication networks

Patent Number: 8111693
Publication Date: 2012-02-07
Inventors: Alberth, Jr., William P.; Shurboff, Carl L; Thorson, Dean E

A method for receiving a broadcast message in a wireless communication device is disclosed. The device receives a broadcast message that has associated therewith a unique message grouping identifier and determines whether the unique message grouping identifier of the received message is equal to a unique message grouping identifier of a previously received message. The device ignores the received broadcast message when the unique message grouping identifier of the received message is equal ...

System and method for modifying network traffic

Patent Number: 8111692
Publication Date: 2012-02-07
Inventor: Ray, Amar

The disclosed embodiments include a system and method for modifying network traffic. For example, in one embodiment, the method includes receiving a packet at an intermediate network node at a network layer. The method determines at the intermediate network node whether layer injection can be performed at the intermediate network node. If layer injection can be performed at the intermediate network node, the method identifies at least one application or protocol associated with the packet ...

Graceful network merge by performing a graceful transition of conflicting routing identifiers

Patent Number: 8111691
Publication Date: 2012-02-07
Inventors: Tiwana, Gurumukh Singh; Kulhari, Ajay; Sane, Sanjay

Methods and apparatus for merging two or more networks are disclosed. In one embodiment, a first switch of a first network receives a second set of information including routing identifiers associated with a second network, wherein the first switch of the first network is connected to a second switch of the second network. The first switch of the first network transmits a first set of information including routing identifiers associated with the first network. The first switch determines ...

Routing traffic through a virtual router-based network switch

Patent Number: 8111690
Publication Date: 2012-02-07
Inventors: Alam, Naveed; Jain, Samir; Cheng, Joseph; Millet, Tim; Hussain, Zahid; Lockwood, Greg

Methods and systems are provided for routing traffic through a virtual router-based network switch. According to one embodiment, a flow data structure is established that identifies current packet flows associated with multiple virtual routers in the virtual router-based network device. When an incoming packet is received by the virtual router-based network device, it is then determined whether the incoming packet is associated with a current packet flow by accessing the flow data structure ...

System for uplink scheduling packet based data traffic in wireless system

Patent Number: 8111689
Publication Date: 2012-02-07
Inventors: Naim, Ghassan; Kakani, Naveen; Huovinen, Lasse; Clanton, Chris

A system for allocating bandwidth resources among various mobile stations which are wirelessly connected to a base station. The length of the data queue in each mobile station is determined and information regarding that length is placed in a field in the outgoing data packet. When it is received in the base station, this field is decoded and the queue length information used to allocate bandwidth resources among the mobile station connections. This allows a very quick response to data ...

Communication system and method

Patent Number: 8111687
Publication Date: 2012-02-07
Inventors: Papamiltiadis, Konstantinos; Kütt, Andres

A method of establishing communication between a first and second terminal, the first terminal being arranged to communicate with a first communication system and the second terminal being arranged to communicate with a second communication system. The method comprises the steps of: a user of the second terminal selecting an identity to represent the second terminal in the first communication system and registering a network address of the second terminal at a first storage means; ...

Aggregating endpoint capabilities for a user

Patent Number: 8111686
Publication Date: 2012-02-07
Inventors: Talwar, Mohit; Chavda, Ankur; Venkateshaiah, Setty; Rao, Sira P.

A method and system for aggregating capabilities from multiple endpoints associated with a user are provided. The system aggregates the capabilities of the endpoints associated with a user into an aggregate view of available modes of communication for reaching the user. Then, the system publishes the aggregate view so that other users who want to send communications to the user will know the modes of communication available for that user. In addition, the system may designate certain modes ...

Communication network with co-routed multi-channel traffic

Patent Number: 8111685
Publication Date: 2012-02-07
Inventors: Sprague, Edward E.; Perkins, Drew D.; Kandappan, Parthiban; Paranjape, Prasad; Grubb, Stephen G.; Welch, David F.; Chiang, Ting-Kuang

Embodiments of the present invention route a wavelength division multiplexed signal across multiple communication paths using skew characteristics of at least some of the communication paths. The network is a wavelength division multiplexed optical transport network. The plurality of communication paths involves different signal and path attributes such as a plurality of carrier wavelengths, optical carrier groups, physical communication paths (different nodes, different fibers along a same ...

Path shortening in a wireless mesh network

Patent Number: 8111684
Publication Date: 2012-02-07
Inventors: Moon, Billy Gayle; Kruys, Johannes Petrus; Thubert, Pascal; Wetterwald, Patrick; Ribiere, Vincent Jean

In one embodiment, a method includes a mesh point receiving mesh advertisement messages from advertising mesh points of a wireless mesh network having a mesh portal with a wired connection to a wired network. Each mesh advertisement message specifies a corresponding metric for reaching the mesh portal and has a corresponding signal strength indicator. An ordered group of parent access points, ordered based on the respective metrics, is generated from among the advertising mesh points, ...

Base station and mobile station for OFDMA cellular system

Patent Number: 8111683
Publication Date: 2012-02-07
Inventors: Tsunehara, Katsuhiko; Kuwahara, Mikio; Yamamoto, Tomonori; Takada, May; Tamaki, Satoshi

In a cellular radio communication system, a base station or a mobile station has a TA (Time Alignment)-range-out detection function, so that when a TA-range-out state that is unable to compensate with a guard interval is detected, the transmission condition of an uplink signal at the mobile station is changed by the mobile station autonomously or by the base station and the mobile station ...

“Shield”: protecting high priority channel access attempts in overlapped wireless cells

Patent Number: 8111682
Publication Date: 2012-02-07
Inventor: Benveniste, Mathilde

A method and system reduce interference between overlapping first and second wireless LAN cells contending for the same medium. Each cell includes a respective plurality of member stations. An inter-cell contention-free period value is assigned to a first access point station in the first cell, associated with an accessing order in the medium for member stations in the first and second cells. The access point in the first cell transmits an initial shield packet to deter other stations from ...

Wireless data communication method for a base station using a common pilot channel and an individual pilot channel

Patent Number: 8111681
Publication Date: 2012-02-07
Inventors: Fujishima, Kenzaburo; Taira, Masanori

A wireless data-communication arrangements including a wireless terminal, located in a direction, receiving the pilot signal and determining a data rate according to reception quality of the pilot signal; the wireless terminal transmitting to a base station a signal for requesting the determined data rate; the base station receiving the signal and, based on the requested data rate, transmitting data to the wireless terminal with the radiation pattern, which includes the beam pattern in a ...

Mobile object information sharing system

Patent Number: 8111680
Publication Date: 2012-02-07
Inventor: Ijiri, Masao

In a system where mobile stations use one frequency to transmit/receive and share position information data, synchronization has been made in a shared time resulting from GPS and the mobile stations transmit the data at mutually different timings that are predetermined, whereby overlapping of the transmissions is avoided. However, the transmission period of a station cannot be changed even if that station wants to change its transmission period. Transmission period determining units are ...

Wireless communication apparatus and wireless communication method

Patent Number: 8111679
Publication Date: 2012-02-07
Inventor: Tsutsui, Masafumi

A wireless communication apparatus on the base station transmits beamformed multi-beam data to a wireless communication apparatus on the mobile station side using a multiple antennas. To obtain an expected directivity without gain reduction under the existence of phase variation in transmission circuits, the wireless communication apparatus on the base station is equipped with a code book that stores beamforming information, a precoder that reads the code book and performs processing to ...