Mitsubishi Electric Research Laboratories, Inc.

Mitsubishi Electric Research Labs.

Renesas Electronics Corporation

Other

Jinyun Zhang

Andreas F Molisch

Philip Orlik

Neelesh B Mehta

Zhifeng Tao

Koon Hoo Teo

Daqing Gu

Raymond Yim

Chunjie Duan

Zafer Sahinoglu

Jianlin Guo

Ghulam Bhatti

Hongyuan Zhang

Ye Li

Jyhchau Horng

Erdem Bala

Sinan Gezici

Yves-Paul Nakache

Toshiyuki Kuze

Yu-Jung Chang

Pallav Sudarshan

Fatih M Porikli

Wataru Matsumoto

Dong Wang

Zhenzhen Ye

Ramesh Annavajjala

Man-On Pun

Lu Zhang

Shigeru Uchida

Huai-Rong Shao

Frederick J Igo, Jr

Masashi Saito

Qinghe Du

Sun Yuan Kung

Xinying Zhang

Jingxian Wu

Rajesh Garg

Yi Huang

Phillip Orlik

Nayef Alsindi

Weihuang Fu

Lei Cao

Kentarou Sawa

Ritesh Madan

Yuan Yuan

Vahid Tarokh

Kieran Parsons

Jonathan S Yedidia

Chia Shen

Hanqing Lou

Tommy C Poon

Hisashi Kobayashi

Stuart C Schwartz

Juntan Zhang

Giovanni Vannucci

Amitav Mukherjee

Amine Maaref

George Fang

Jun Ma

Jianxuan Du

Di Wang

Gennadiy V Vinokur

Xiaoqiang Ma

Chun Kin Au Yeung

Chuan Han

Ronghui Peng

Shengjie Zhao

Tairan Wang

Lun Dong

Yingda Chen

Chun Nie

Xiaozhou Huang

Fadel F Digham

Samuel David Perli

A transceiver has a first antenna and a second antenna for transmitting alternatively a frequency-hopped sounding reference signal (SRS) over a sub-band of a bandwidth at a time. The transceiver includes a determination unit for determining whether a number of sub-bands in the bandwidth is odd or even, a transmitter for transmitting the SRS continuously from the first antenna, if the number of sub-bands is even, and a receiver for receiving a response to the transmitting.

Antenna selection with frequency-hopped sounding reference signals

The embodiments of the invention describe a method for antenna selection in a wireless communication network. The network includes a transceiver having a set of antennas. The transceiver is configured to transmit a frequency-hopped sounding reference signal (SRS) over a subband from a subset of antennas at a time. The transceiver transmits the frequency-hopped SRS from subsets of antennas in the set of antennas alternately. In response to the transmitting, the transceiver receives information indicative of an optimal subset of antennas and transmits data from the optimal subset of antennas.

The embodiments of the invention provide a method for selecting antennas for date transmission in a wireless communication network including user equipment (UE). The network is assigned a band of frequencies, wherein the band is partitioned into at least one set of subbands of the band according to a sounding reference signal (SRS) bandwidth configuration in a form of a codetree having a plurality levels and each level is associated with a partition coefficient. The UE is configured to transmit frequency-hopped SRS on the set of subbands using subsets of the set of antennas. First, the method determines if a number of subbands in the set of the subbands is odd or even based on the SRS bandwidth configuration, and selects a particular subset of the antennas according to whether the number is odd or even. Then, the SRS is transmitted from the particular subset of the antennas.

Multiple routes from a data source node to multiple data destination nodes in a large scale multi-hop mesh network are discovered. Nodes discover multiple routes to two destinations in an initial discovery phase that includes only two network-wide flooding of packets. The method can also work with one destination. The method can be extended to include more destinations with a proportional increase in the communication overhead. After the completion of the discovery phase, nodes can communicate or forward their own or received data by using any of the available routes.

Method for discovering multiple routes in sensor networks

The embodiments of the invention describe a method for antenna selection in a wireless communication network. The network includes a transceiver having a set of antennas. The transceiver is configured to transmit a frequency-hopped sounding reference signal (SRS) over a subband from a subset of antennas at a time. The transceiver transmits the frequency-hopped SRS from subsets of antennas in the set of antennas substantially alternately. In response to the transmitting, the transceiver receives information indicative of an optimal subset of antennas and transmits data from the optimal subset of antennas.

A method and system generating signal to select a subset of antennas from a set of antennas to transmit user data in a wireless communication system. User data are transmitted during a first transmission time intervals (TTI) using a first subset of antennas. Pilot tones are transmitted during a second TTI using a second subset of antennas. Corresponding channels are estimated for the first subset of antennas and the second subset of antennas from the user data and the pilot tones. Then, based on the estimating, an optimal subset of antenna is selected from the first subset of antennas and the second subset of antennas to transmit the user data during a sequent TTI, and in which the selecting is performed adaptively.

Method and system for generating antenna selection signals in OFDM tranceivers with fewer RF chains than antennas in MIMO wireless networks

Broken links in a sensor network are avoided by representing the network as a DODAG. A rank associated with each node defines a position of each node relative to other nodes, and the rank is in a form of a proper fraction, and the rank of each node never increases to enable loop-free routing.

Avoiding broken links in smart meter networks for loop-free routing of packets

A network includes a transmitter and a receiver, wherein the transmitter includes a set of transmit antennas and the receiver includes a set of receive antennas. The transmitter duplicates a packet as copies of the packet, and selects subsets of the set of transmit antennas independent of channel characteristics between the subsets of transmit antennas and the set of receive antennas, wherein combinations of the antennas in the subsets of the transmit antennas are different. The receiver selects subsets of the set of receive antennas independent of channel characteristics between the subsets of receive antennas and the set of transmit antennas, wherein combinations of the antennas in the subsets of the receive antennas are different. The selected subsets are used to transmit the packet, and retransmit the packet in case of a failure in a previous transmission.

Method of selecting antennas in a wireless communicating network for high reliability and low latency

A system includes a structure configured to exchange the energy wirelessly via a coupling of evanescent waves. The structure is non-radiative, and generates an electromagnetic (EM) near-field in response to receiving the energy. The structure is configured to exchange the energy when the structure is in the resonant mode. The system also includes a tuning module configured to transition the structure in and out of the resonant mode based on an instruction, an energy monitor module configured to determine the instruction based on information indicative of the energy stored and/or exchange by the structure, and a transceiver configured to transmit and/or to receive the instruction.

System and method for energy transfer

An operation channel in a multi-hop network is determined. The network uses a set of channels, and one of the nodes is a network management node. The operation channel is selected in the network management node. Then, the network management node broadcasts a channel information packet including the operation channel using all channels. The channel information packet is received in each of other nodes, either directly from the network management node or from an intermediate node that received and rebroadcasted the channel information packet. Lastly, the operation channel in each node is set according to the channel information packet until the network is formed.

Channel scan for smart meter networks to determine operating channels

The invention provides a data structure embodied in a computer readable media. The data structure is a protocol data packet (PDU) communicated in a mobile multihop network between stations. The data structure includes a relay media access header, a payload and an optional cyclical redundancy checksum for the protocol data unit, and an indication whether the PDU is a relay media access protocol data unit or not.

Protocol data units and header in multihop relay network

A method for transmitting information in a communication network of multiple nodes, in which information transmission is partitioned into successive superframes, and in which each superframe is partitioned into a beacon period followed by a data period, which may consist of a contention free period (CFP), and each beacon period and CFP of the data period is partitioned into timeslots. The method includes allocating to at least a first node of the multiple nodes a designated timeslot in which to transmit data in at least one of a plurality of superframes, and allocating to at least a second node of the multiple nodes the same designated timeslot in which to transmit information during at least one subsequent superframe.

Timeslot sharing protocol for wireless communication networks

A hybrid communication network for a transportation safety system includes a fixed wired nodes and mobile wireless nodes. Because the wired nodes operate independently packets transmitted by the wired nodes to the wireless nodes need to be synchronized. A downlink travel time for downlink packets traveling from a controller to the wireless nodes is determined. Then, the controller schedules downlink data intervals (DDI) based on the downlink travel time; and transmits downlink packets to the wireless nodes during the DDI, such that a latency requirement of the transportation safety system is satisfied.

Method for scheduling data transmission in hybrid communication networks for transportation safety systems

An encoder in a transmitter uses space-time trellis coding. An input bitstream is multiplexed to produce in parallel a set of output bitstreams. A multiplier applies a code generating weight to each output bitstream, which are combined, mapped and transmitted by a single antenna.

STTC encoder for single antenna WAVE transceivers

A computer implemented method selects antennas in a multiple-input, multiple-output wireless local area network that includes multiple stations, and each station includes a set of antennas. Multiple consecutively transmitted sounding packets are received in a station. Each sounding packet corresponds to a different subset of the set of antennas. A channel matrix is estimated from the multiple consecutively transmitted sounding packets, and a subset of antennas is selected according to the channel matrix.

Training signals for selecting antennas and beams in MIMO wireless LANs

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Cambridge, MA, United States of America

Jinyun Zhang