165 results about "Wireless relay network" patented technology

A method and system for using a communication network having a relay node to provide wireless communication with a mobile station. A ranging region is established with the mobile station in which the establishment of the ranging region includes the transmission of control information corresponding to the relay node. The mobile station is allowed to enter the communication network. The relay node is used to wirelessly communicate with the mobile station in at least one of the uplink and downlink directions.

A wireless relaying network having a number of network nodes including a designated originating node, at least one relaying node, and at least two receiving nodes. The designated originating node transmits a pilot signal, and the relaying node(s) receives and forwards the pilot signal to the receiving nodes, each of which measures channel quality based on the received pilot signal. At least part of the receiving nodes feed information on the measured channel quality all the way back to the designated originating node, and the originating node then schedules data for transmission to at least one selected node of the receiving nodes based on the received channel quality information. Subsequently, the designated originating node transmits data to the selected receiving node(s) via the same relaying node(s) that forwarded the pilot signal. In this way, multi-user diversity scheduling is introduced to relaying networks that provides significant data rate enhancements.

A wireless relay module for networked communications between a series of medical devices and a remote monitoring device. An interface circuit coupled to each medical device communicates with the wireless relay module via a wireless relay network. The relay module communicates with the remote monitoring device over an internet-accessible wireless communication network, and includes a receiver coupled to the wireless relay network, a first transmitter coupled to the wireless relay network, a second transmitter coupled to the internet-accessible wireless communications network; and a controller. The controller determines a status of the internet-accessible wireless communications network. When the status indicates that the internet-accessible wireless communications network is accessible, the second transmitter is selected for transmitting medical device data. When the internet-accessible wireless communications network is not accessible, the first transmitter is selected for transmitting the data to another wireless relay module.

A method and apparatus is disclosed herein for performing multi casting. In one embodiment, the method comprises receiving routing, association, relaying, and / or topology information associated with a plurality of nodes in a multi-hop wireless network, the plurality of nodes communicably coupled in a tree or mesh arrangement via a plurality of broadcast channels; and determining a subset of the plurality of nodes over each broadcast channel on the multi-hop wireless network that is responsible for sending acknowledgment information, in response to receipt or lack of receipt of transmissions, back to senders of transmissions.

Wireless relay modules for networked communications between a medical device and a remote monitoring device via wireless relay networks and / or internet-accessible wireless communications networks. The wireless relay module includes a receiver, a first transmitter coupled to the wireless relay network, a second transmitter coupled to the internet-accessible wireless communication network, a controller and a display. The controller is coupled to the first and second transmitters, and controls the wireless relay module to select one of the transmitters for transmitting medical device data over one of the two respective networks. The controller generates an alarm signal and stores storing wirelessly-received medical device data in a memory of the wireless relay module upon detecting a changed characteristic for a power source of the wireless relay module. The controller also generates an alarm upon detecting a change in a characteristic of a signal transmitted by the medical device.

The present invention relates to a selection method of a user resident mechanism pf a wireless multi-hop relay network and synergy relay nodes centralizedly controlled by the base station. The present invention provides a user resident mechanism, uses thefriendly relay nodes relay and control the signaling transmission to complete; at the same time provides a relay node selection method of carrying out the centralized control and management to the entire relay node selection process by the base station, which is carried in synergies through potential relay nodes and the target terminal. The identification and selection of the relay node are divided into two steps: the first step is to identify the appropriate relay nodes, to constitute an alternative assembly; and the second step is to select a relay nodes subset to tansmit the carrying business from the alternative assembly according to the multi-optimization objective selection algorithm, and contemporarily completing the business carrying configuration of the relay nodes in the subset based on the business properties, as well as the hollow characteristics. The method not only focuses on a two-hop wireless relay network, but also can extend to the multi-hop wireless relay networks, or even extends to a wireless Mesh network and a wireless sensor network.

In accordance with the invention, signal information representative of a first set of information to be transmitted more than one time over at least one link is stored as a priori known signal information. This could be previously received and / or, detected information, own transmitted information or otherwise available relevant signal information in the node. Signal information representative of a second set of information is received, wherein a transmission of the first set of information interferes with the reception of the second set of information. In spite of the interference, at least part of the second set of information can still be successfully be detected by exploiting the received signal information and at least part of the previously stored a priori known signal information. The information is detected by interference cancellation based on the received signal information and relevant parts of the a priori known information. The set of priori known signal information is preferably updated by continuously storing newly detected information.

In accordance with the invention, signal information representative of a first set of information to be transmitted more than one time over at least one link is stored as a priori known signal information. This could be previously received and / or, detected information, own transmitted information or otherwise available relevant signal information in the node. Signal information representative of a second set of information is received, wherein a transmission of the first set of information interferes with the reception of the second set of information. In spite of the interference, at least part of the second set of information can still be successfully be detected by exploiting the received signal information and at least part of the previously stored a priori known signal information. The information is detected by interference cancellation based on the received signal information and relevant parts of the a priori known information. The set of priori known signal information is preferably updated by continuously storing newly detected information.

An architecture for networked communications between a series of medical devices and a remote monitoring device. An interface circuit coupled to each medical device communicates with one of a plurality of relay modules via a wireless relay network. The relay modules communicate with the remote monitoring device over an internet-accessible wireless communication network. Each relay module includes a receiver coupled to the wireless relay network, a first transmitter coupled to the wireless relay network, a second transmitter coupled to the internet-accessible wireless communications network; and a controller. The controller determines a status of the internet-accessible wireless communications network. When the status indicates that the internet-accessible wireless communications network is accessible to the wireless relay module, the second transmitter is selected for transmitting medical device data. When the internet-accessible wireless communications network is not accessible, the first transmitter is selected for transmitting the data to another wireless relay module.

Wireless relay modules for enabling alarm recognition and alerts in networked communications between a series of medical devices and a remote monitoring device via wireless relay networks and / or internet-accessible wireless communications networks. The wireless relay module including a receiver, a first transmitter coupled to the wireless relay network, a second transmitter coupled to the internet-accessible wireless communication network, a controller and a display. The controller identifying if received medical device data from the medical device includes an alarm condition and causing the display to display an alert accordingly. The wireless relay module may additionally include a speaker alone or in combination with a microphone for providing an audible alert of the alarm condition and verbal communication between a local healthcare provider and a clinician at the remote monitoring device.

A method for adopting network code communication in wireless relaying network, improves the relaying ascending transmission efficiency by setting up relaying nodes and using network coding technique. The method includes the following steps: 1) disposing relaying nodes with network coding function in cellular districts, in order to extend signal coverage and be suitable for adopting network coding; 2) a base station self-adaptively determining whether to adopt relay whether to process using network coding to terminals at the relay point; 3) according to the base station feedback information, relay nodes performing data stream processing based on the network coding technique; 4) the base station centralizedly controlling the switch updating processing of network coding: when terminals move in different service districts, the base station updates relay nodes or service districts, amd newly execute network coding processing at novel relay points. The invention adopts network coding operations at relay nodes, so that the invention can respectively perform coding forwarding to the received different routing information, and largely improves relay transmission efficiency and transmission performance of edge users.

A method for transmitting packets from a source node to a destination node via relay nodes of a wireless network. Packets are transmitted from the source node, along a route of relays nodes, to the destination node in a wireless network. Energy of the packets is accumulated only in the destination node by storing multiple versions of the packet. The packets are decoded in the destination node using the accumulated energy.

The invention discloses a multi-user network coding communication method with a high speed parallel encoding and decoding structure, which comprises the following steps: in a wireless relay network, multiple accessed user information is integrally interweaved by a relay node, serial / parallel conversion is carried out on the interweaved sequence, multiple groups of converted parallel data are input to a high speed parallel encoder to be encoded, and finally encoded data is broadcasted, thus realizing network encoding. A base station carries out teration decoding by means of a combined network-channel decoder according to original data broadcasted by users and data obtained by network encoding and channel encoding and forwarded by the relay node to obtain the original information of the users. The decoder of the base station comprises two parallel decoder groups, i.e. a user decoder group and a relay decoder group; iteration decoding is realized through transmitting soft information between two parallel decoder groups, thus not only recovering the original information of all accessed users but also improving decoding reliability and reducing decoding time delay. By adopting the method, the relay uplink transmission efficiency and the quality of transmission signal are improved.

A wireless relay module for networked communications between a series of medical devices and a remote monitoring device. The relay module communicates with the remote monitoring device over one or more internet-accessible wireless communication networks, and includes a receiver, transmitter for communicating over wireless relay networks, other transmitters for the one or more internet-accessible wireless communications networks; and a controller. The controller determines a status of the one or more internet-accessible wireless communications networks. When the status indicates that at least one of the interne-accessible wireless communications network is available, the appropriate transmitter is selected for the transmitting medical device data over the available internet-accessible wireless communications networks. When internet-accessible wireless communications networks are not accessible, the appropriate wireless relay network transmitter is selected for transmitting the data to another wireless relay module.

The invention discloses a method and equipment for relay node selection and power distribution in a wireless relay network. The method comprises the following steps of: obtaining the energy price of each node in the wireless relay network and the link information of a link between each node and adjacent nodes; respectively determining power distribution corresponding to the minimum target function value of the energy price of each node under the condition that the node is selected as a relay node according to the energy price and the link information of each node; and respectively determining the node and the power distribution corresponding to the minimum target function value for each node in power distribution as the relay node and the power distribution for data transmission. The communication equipment provided by the invention comprises an acquiring module, a first determining module and a second determining module. In the method and communication equipment provided by the invention, the pricing strategy of energy consumed by each node is introduced, so that the balance between energy utilization efficiency and energy consumption can be taken into account, and the service life of the wireless relay network can be prolonged.

This invention provides a method for jointly optimizing network coding, channel coding, and signal constellations in non-coherent wireless multiple-input multiple-output (MIMO) wireless relay networks for the case when transceivers cannot obtain any knowledge of channel state information (CSI) due to high-speed mobility of the transceivers. In the relay networks, two terminal transceivers simultaneously transmit data to an intermediate relaying transceiver, which in turn broadcasts mixed data using physical-layer network coding to both terminals. The embodiments of this invention exploit different blind space-time trellis-coded modulations (ST-TCM) for each user, whose codebook is jointly generated over a Grassmannian manifold. The method is provided by exponential mapping with affine-lattice convolution for joint optimization of channel coding, modulations, and network coding. The method is designed for fast fading channels with and without interleaving. The method significantly improves performance in non-coherent bidirectional relaying MIMO networks.

A wireless relay module for networked communications between a series of medical devices and a remote monitoring device. An interface circuit coupled to each medical device communicates with the wireless relay module via a wireless relay network. The relay module communicates with the remote monitoring device over an internet-accessible wireless communication network. The controller determines a status of the networks. When the status indicates that the internet-accessible wireless communications network is available, a transmitter transmits medical device data over this network. When the internet-accessible wireless communications network is not accessible, another transmitter transmits the data to another wireless relay module. In addition, the controller obtains status information the two networks, and either transmits this information to one of the medical devices or prepares the information for display on a display of the wireless relay module.

An apparatus and a method for estimating the channel state of each link in a wireless relay network having fixed RSs are provided. A source estimates a channel of a source-RS link and a channel of a source-destination link using pilot signals received from an Relay Station (RS) and a destination and the source monitors reception of a pilot signal including channel state information of an RS-destination link from the RS. Upon receipt of the pilot signal, the source estimates a channel of the RS-destination link using the pilot signal and the channel state information of the RS-destination link.

The present invention proposes a method of communication in a wireless relay network for finding group of relays that minimizes total energy consumption to send one successful bit to destination node, under reliability condition expressed in terms of average BER level, said method comprising three main phases in the manner that a reservation stage where cooperative data transmission request is made by the source node, an ACO epoch, where the announcements of the candidate relays are sent, the cooperation set is formed and power levels are assigned, and the cooperative data transmission stage itself, are defined.

Cross-talk is canceled in a cooperative wireless relay network that includes a base station (BS), a relay station (RS), and a mobile station (MS). A coupling channel between a transmit antenna and a receive antenna colocated at the RS is estimated. Cross-talk interference determination is based on a previous transmitted signal by the transmit antenna, and the coupling channel. The cross-talk interference is subtracted from a currently received signal by the receive antenna to obtain a residual signal. The residual signal is then transmitted as a next transmitted signal by the transmit antenna.

A wireless sensor network technology based drilling well site monitoring system comprises a single-well wireless sensor monitoring network, a cross-well wireless relay network and a central control data analysis system. The single-well monitoring network adopts a group of sensor nodes to take charge of collecting the drilling condition data, is connected with all the single-well networks in the well site by relay nodes to form a secondary cross-well wireless relay network and realizes long-distance connection with a central control room by way of multihop. The central control data analysis system provides users with various data services and such services as visualized monitoring, control, management and the like. In the system, the used sensor nodes adopt sensor module and computing and communication split type design so as to be convenient for matching different types of sensors. The cross-well network adopts random networking, thus improving the flexibility and expandability of the system.

The invention discloses a network coding transmission method applied to a multi-user-pair two-way relay communication system. The method comprises the following steps that: a relay station receives the user sending information of a user node to which multiple user pairs belong to obtain relay receiving information; the relay station obtains multiple network coding information corresponding to different user pairs according to the user pairing condition by utilizing instant channel status information and the relay receiving information; and the relay station superimposes multiple network coding information corresponding to different user pairs to obtain relay forwarding information and broadcasts the relay forwarding information to the user node. Through adopting the network coding transmission method based on interference arrangement in a wireless relay network, the user sending information of the user node to which the multiple user pairs belong can be simultaneously transmitted, andthe user sending information of the user node to which the multiple user pairs belong is projected to the vector direction with different signal spaces, thereby eliminating the interference among theuser pairs and improving the transmission efficiency of a two-way synergetic relay network.

The invention discloses an orthogonal network space-time coding method in wireless communication system, which is used for realizing a wireless communication network which is provided with a plurality of source nodes, wherein, each of the source nodes is provided with an antenna, and a relay node is provided with two antennas; the invention aims at solving the technical problem of low throughput and large diversity loss for the existing wireless relay network. The invention is divided into two steps: the source node broadcasts data information to the relay node and a destination node, and the relay node transmits the orthogonal network space-time coding, wherein, the latter step is also divided into five processes: relay node decoding, grouping estimated information, compressing estimated information, space-time coding of compressed data and space-time transmission; the two steps totally need TSR +2 symbol period. The invention divides the estimated information in the TSR+2 symbol period for the relay node into two groups for space-time coding, and completes sending within two symbol periods, the throughout can reach TSR / (TSR +2) symbol / user / symbol period, thereby increasing the throughout of the relay network and reducing the diversity loss.

The invention discloses a joint optimization method of safety capacity and energy consumption in a wireless relay network, and relates to the field of wireless relay network cooperative communication. The method comprises the steps as follows: a safety capacity value from a source node to a destination node is restrained to be SCcon; a minimum energy consumption function of an interference node is obtained by using a beam forming technology according to the SCcon; a minimum energy consumption function of a relay node is obtained according to the SCcon; a minimum energy consumption function Dpower of a system is obtained; a minimum energy consumption value of the system is obtained at an extreme point of a minimum value of the Dpower, and the restrained safety capacity is released; and an efficiency function RSE of the system energy consumption is calculated. The invention provides a joint optimization strategy of the relay node and the interference node, and an accurate expression of equivalent safety capacity maximization corresponding to the unit energy consumption of the system is obtained, so that each part of energy reaches the maximal usage value, and the problem of balance between the safety and the energy efficiency in the wireless relay network under a single sniffing node is effectively solved.

A method and a device for data relay transmission in a wireless relay communication network are provided, in which, the relay station directly obtains corresponding egress CID related information based on input MAC PDUs, then generates output MAC PDUs including the egress CID related information, and at last, according to the egress CID related information, performs QoS scheduling for the output MAC PDUs, so as to output them in an sequence of QoS. The invention omits the steps of de-cascading, de-segmenting or de-capsulating the MAC PDUs in order to obtain MAC SDUs, and the steps of scheduling by category, cascading, segmenting, and encapsulating the MAC SDUs in order to re-generate the MAC PDUs in the prior art, and the invention simplifies the data processing procedure and achieves the goal of decreasing the relay latency. Preferably, before the relay station generates the output MAC PDUs based on the input MAC PDUs, it can also schedule the input MAC PDUs based on the ingress CID information therein, so as to further improve the QoS service performance.

This invention concerns distributed turbo coding and relaying protocols wireless relay networks. In particular, the invention concerns a method for relaying signals at a relay node, a method for processing signals at a destination node, a relay system and software to perform the methods. The wireless relay networks comprise a source node, a destination node and one or more relay nodes. At a relay node, the invention comprises the steps of receiving a signal from a first node; decoding the received signal; and if the received signal is decoded incorrectly, employing an Amplify-And-Forward (AAF) relaying protocol comprising the steps of amplifying the received signal and then transmitting the amplified signal to a second node; but otherwise, employing a Decode-And-Forward (DAF) relaying protocol comprising the steps of re-encoding the decoded signal and then transmitting the coded signal to the second node. At a destination node, data transmitted by the source node is recovered by combining all signals received from the source and relay nodes and then decoding the combined signal.

The invention discloses a data transmission method and a data transmission system, which are used for solving the technical problems of uplink transmission conflicts or uplink resource wasting under the condition of not introducing a relay-physical hybrid automatic repeat request indicator channel (R-PHICH) in a wireless relay network system. In the method and the system, a first network element explicitly and / or implicitly indicates hybrid automatic repeat request (HARQ) feedback information to a second network element; and the second network element transmits data or does not transmit the data according to the HARQ feedback information. By the method and the system, the data transmission conflicts are avoided, and resource scheduling needs are satisfied by an explicit and / or implicit indication way; and the R-PHICH is not required so as to avoid overhead in a Un interface resource configuration PHICH, reduce the signaling overhead of a relay-physical downlink control channel (R-PDCCH) for a Un interface, improve scheduling efficiency and increase the utilization rate of the resources.

A communications schedule routes data between relay nodes forming a wireless relay network and interconnects relay nodes by an ordered sequence of communications links established over a wireless resource comprising resource blocks. Candidate connectivity patterns for the ordered sequence of communications links and candidate resource allocations are provided. For each candidate connectivity pattern, a level of a performance characteristic is calculated for a selected combination of the candidate resource allocations. Based on a desired level of the performance characteristic, a candidate connectivity pattern and associated selected combination of candidate resource allocations whose calculated level of the performance characteristic meets the desired level, is selected as the communications schedule. In response to a trigger condition, the performance level evaluation process and the selection process are repeated to re-select one of the candidate connectivity patterns and its associated selected combination of candidate resource allocations to be used as the communications schedule.