54results about How to "Improve link quality" patented technology

Symbol decoding errors at a receiver utilising a flash analog to digital converter (ADC) can be reduced by adjusting a reference voltage level of the ADC where a decoding error rate at the reference voltage level exceeds a threshold.

According to the present invention, a method in a base station is provided for predicting interference contribution, when scheduling an uplink data packet transmission from a first user equipment. The first user equipment is connected to the base station. The first user equipment is in the neighbor of a neighboring cell served by a neighboring base station. The method comprises the steps of: Obtaining signal strength measurements regarding the first user equipment. The signal strength measurements are based on a signal between the first user equipment and the neighboring base station; Receiving a resource scheduling request regarding the first user equipment for the uplink data packet transmission; Scheduling uplink resources for the requested uplink data packet transmission; Determining transmission power to be used for the scheduled uplink resources, and: Estimating an interference prediction contribution based on the determined transmission power and the obtained signal strength.

Disclosed are systems and methods which provide high bandwidth data communication with respect to a large coverage area using smart antenna and / or directional antenna (referred to herein as multi-beam antenna) technology. Circuitry may be provided at a WLAN AP to provide selection of particular antenna beams used in the downlink and / or uplink, control of multicast transmission, control of unicast transmission, and to provide antenna pattern shaping techniques. Embodiments implement multi-beam antenna technology with little or no hardware modifications to AP circuitry. Other embodiments implement multi-beam technology using radio front-end and / or radio hardware modifications to AP circuitry. Various diversity techniques may be implemented, such as selection diversity, maximum ratio combining, and equal gain combing. To provide desired antenna pattern shaping, phase offsets with respect to a signal as transmitted in each antenna beam may be employed.

The present invention provides a method and apparatus for routing a data flow from a source node to a destination node in a mobile ad-hoc network (MANET). The present invention performs this function by first determining desired service requirements for an individual data flow to be forwarded to a destination node. Next, the present invention broadcasts an advertisement for each of the links in the MANET by the corresponding origination nodes, the advertisement including a value indicating the current performance level of the link. After broadcasting the advertisements, routing tables are composed at each of the nodes based upon the advertisements. Each routing table is constructed taking into account the advertised links and their corresponding values. After composing the routing tables, packets are forwarded toward their respective destinations by utilizing the routing tables in such a manner that the desired service requirements are satisfied.

The invention relates to a power control method for reducing the interference between relay systems, which comprises the following steps: subscriber station measures the link quality information and feeds back the information to an assignment relay station and / or relay station; the base station and / or the relay station estimates the interference of the subscriber station on the basis of the link quality information; the base station and / or the relay station determines the direction and / or step in which the downlink emission power of various neighboring relay stations once again according to the interferential value. By adopting the method disclosed in the invention, the interference between relay stations can be reduced so as to enhance the link transceiving quality from the relay station to the subscriber station.

Symbol decoding errors at a receiver utilising a flash analog to digital converter (ADC) can be reduced by adjusting a reference voltage level of the ADC where a decoding error rate at the reference voltage level exceeds a threshold.

A system and method is disclosed to evaluate the suitability of Wi-Fi and cellular networks by considering the temporal and spatial overlap of Wi-Fi APs

Described embodiments provide systems and method for reordering the IP addresses within a DNS response. The servers associated with a domain can often be located across multiple locations. The paths from a client to each of those different servers can have different link qualities. Additionally, the connection between the client and the domain can have different quality requirements. The present solution can consider the link qualities and the connection quality requirements to reorder the IP addresses within a DNS response. By reordering the IP addresses, the system can control to which of the servers the client connects and can ensure that the connection is made over a path that can fulfill the connection's quality requirements.

A communication system has a plurality of nodes adapted to provide for a communication with one or more devices, a central node, a passive optical network having a multiplexer / demultiplexer device adapted to demultiplex a first optical signal from the central node to the plurality of nodes, and to multiplex second optical signals from one or more of the nodes, each node having allocated a wavelength for generating its optical signal, wherein for directly transmitting signals from one node to at least one of the other nodes, the one node is adapted to generate an optical signal at the wavelength allocated to the at least one of the other nodes, the optical signal including the signal to be transmitted, and wherein the multiplexer / demultiplexer device of the passive optical network is adapted to combine the optical signal from the one node with the first optical signal.

The embodiments of the invention disclose a port state setting method, and port priority selection method and device. The setting method comprises the following steps: in the link failure recovery process, a first LACP message for establishing connection is sent by a transmitting end to a receiving end, wherein the first LACP message comprises delay selection information; when an acknowledgement message responding to the first LACP message sent by the receiving end is received by the transmitting end, the delay timing process is started, and the port state of a corresponding link on the transmitting end is set to the standby state; and when the time of the delay timing process reaches a default delay time, if ports of the corresponding link on the transmitting end are normal, then the state of the ports of the corresponding link on the transmitting end is set to the selected state, and a second LACP information of the received acknowledgement message is sent to the receiving end, so that when the second LACP information is received by the receiving end, the state of the ports of a corresponding link on the receiving end is set to the selected state. According to the invention, the possibility of link repeated shock can be reduced, and the link quality can be improved.

A diversity apparatus for a mobile communication terminal with a GPS function. The diversity apparatus comprises: a first multiband antenna with a first reception polarization characteristic, for receiving a combined RF signal of a GPS signal and a mobile communication signal; a second multiband antenna with a second reception polarization characteristic distinguished from the first reception polarization characteristic, for receiving a combined RF signal of a GPS signal and a mobile communication signal; and a switching diversity unit for selecting one of the RF signals received by the first and second multiband antennas.

A modal adaptive antenna system that dynamically samples proximity sensors or other sensors to determine the use case for the wireless device and then adjust the antenna radiating mode to optimize communication link performance. The modal adaptive antenna system is capable of modifying the antenna radiation pattern to improve communication link quality along with near-field parameters such as SAR and HAC. An algorithm and look-up table containing pre-measured electrical parameters to include TRP, TIS, and SAR are developed and integrated with hardware which includes an antenna and active components to dynamically modify the radiation pattern of the antenna as well as proximity sensors and or other sensing devices.

The invention discloses a signal transmitting method, a signal receiving method, a device and a system in wireless communication. The invention relates to the technical field of wireless communications, in particular to a data processing method, a device and a system. According to the data processing method provided by the invention, transmission equipment uses a sequence to carry data and reference signals respectively; the transmission equipment carries two paths of data to odd elements and even elements of the sequence respectively; and after the transmission equipment continuously maps thesequence carrying the two paths of data to allocated subcarriers, the data is transmitted by means of an orthogonal frequency division multiplexing (OFDM) manner. The signal transmitting method, thesignal receiving method, the device and the system aim to reduce the cubic metric (CM) / peak-to-average ratio of a transmitted signal of an orthogonal frequency division multiplexing (OFDM) system by means of sequence design and the mapping of the two paths of data to the subcarriers, thereby improving the link quality of a whole transmission system.

A modal antenna array is described where modal antenna elements capable of generating multiple radiation modes are used to form array radiation patterns. Nulls in the array radiation pattern can be formed and positioned by proper modal antenna element mode selection, with these nulls used to provide interference suppression or mitigation. The shift in array radiation pattern maxima generated by modal element mode selection can be used to improve communication system link quality by optimizing array radiation pattern characteristics. Specifically, a ring or circular array configuration is described where a simplified common feed port can be implemented to feed multiple modal antenna elements used to form the array. A switch can be used to connect or disconnect one modal element from the array, with this feature providing additional unique array beam states. The modal array can be commanded via a look-up table or algorithm.

Bit error rate estimates are used for measuring link quality in a radio telecommunications system. Unbiased, raw bit error estimates are produced from existing pilot symbols. The bit error rate estimates may be generated without incurring extra signaling overhead. More particularly, an estimation of link quality is obtained by receiving control signals in a radio receiver, where each control signal may include one or more pilot symbols deriving a channel estimate for each control signal, modifying each channel estimate as a function of the corresponding control signal's contribution to the channel estimate, and deriving a link quality measure based on said modified channel estimates.

A codebook 58 includes a first subset of M codewords 82 and a second subset of N-M remaining codewords 84. Codewords in the first subset are used for signaling a beginning or end of an in-band stream of data. Designated frames 90 make up the stream and include both speech and data. Each codeword index defines L bits that are used to encode speech. Within the designated frames, D bits of the L bits carry data and the remaining L-D bits are used to search from a truncated number of codewords uniquely identifiable by the L-D bits. The designated frames may be a set number of consecutive frames, or the set number of frames dispersed to recur once every 1 / K frames. The number of designated frames may be extended by re-transmitting a codeword from the first subset, or truncated by transmitting a stop codeword that is also within the first subset of codewords. All of the L bits are available to search the codebook in non-designated frames that do not carry data. Data rate and effective codebook size may be selected by the various codewords of the first subset.

This invention discloses a MIMO communication method for signal asynchronous emission characterizing that it applies a hierachical empty time code structure and an emitter delayes signals of different emission antennas and emits them asynchronously, a receiver applies an asynchronous MIMO test method to test signals, in which, the gain brought with time delay hierarchy is used by different time dealy to emission signals at the emission end and at the receiving end, the receiving hierarchy is increased by the MIMO test method to increase the link quality of the MIMO system.

In an H-ARQ system, when transmission on the FL MAC channel of DRCLock or CQILock bits is eliminated, other feedback information carried by the FL MAC channel is used as an RL quality indication for determining at least in part when to make a serving sector switch from a current serving sector to a non-serving sector in its active set. In particular, when data traffic is present, the ACKs / NAKs fed back to the AT on the FL MAC channel are used at least in part in determining when to make such a serving sector switch. In systems operating in accordance with CDMA2000 EVDO RevA / RevB standards, for example, this information is used in conjunction with quality measurements on the FL in determining when to make a serving sector switch. In future systems operating in accordance with CDMA2000 EVDO RevC standards currently under development in which the RL can be switched independently of the FL, this information is directly used to determine when to make an RL serving sector switch.

The invention relates to the technical field of radio communication and particularly relates to a data processing method, device and system. According to the data processing method provided by the invention, a data sending device modulates a to-be-transmitted bit sequence and separates a real part and an imaginary part of a complex symbol obtained through modulation into two symbols, thereby forming a symbol sequence, carries out phase rotation on the symbols in the symbol sequence and then carries out sending through single carrier frequency division multiple access (SC-FDMA) symbols. According to the method, the device and the system, through separation of the real part and the imaginary part of transmission signals, a peak-to-average power ratio (PAPR) of the transmission signals of anorthogonal frequency division multiplexing (OFDM) system is reduced, so the link quality of the whole transmission system is improved.

The invention relates to a medium-low earth orbit satellite constellation and a beam design method thereof. By adoption of earth matching wave beams, satellite signal landing level inconsistency caused by path difference is compensated. Wave beam arrangement optimization is carried out in two dimensions of a constellation and a single satellite, and high C / I full coverage of wave beams is realized. Meanwhile, for the problem of non-uniform distribution of the low-orbit satellite service, the power adjustment capability of the beams is improved by adopting the phase-only weighted optimization of the transmitted beam. The invention can be applied to beam optimization design of medium and low orbit multi-beam satellites and constellations, and has very strong practicability and market competitiveness.

The invention provides a method for generating web application slices in virtualized wireless access edge cloud, which comprises the following steps: S1, constructing logic mapping of virtualized wireless access network slices, translating the qualitative demand of the network application into the network function of the virtual service, the performance of each function, the association relationship of each function and the resource quantitative demand of each performance of each function; S2, converting virtualized network function arrangement and virtualized network resource arrangement into optimization problems, and realizing arrangement of virtualized wireless access network slices; and S3, constructing physical mapping of virtualized wireless access network slices, and realizing dynamic distribution of network resources. The heterogeneous multi-base-station joint mapping virtualized network resource migration is realized, the cell boundary limitation is broken, and the link quality between the virtual cell and the terminal is always better.

A method for dynamically determining the power compression point of an amplifier in a distributed network under the control of a computer, the network having a first terminal (600) including the amplifier operatively coupled to a plurality of second terminals (500) by a communication channel including the steps for generating bit error rate (BER) messages indicative of measured BER for a signal transmitted at N power levels, the BER messages including respective tags indicative of the N power levels for that BER, at the second terminals (500), and reducing the maximum allowed power of the amplifier when it is determined that the amplifier is approaching saturation responsive to the BER messages. Also described is a method for dynamic uplink power control for an amplifier in a distributed network.

The present invention relates to a multiple network service sharing method and a device for the same. With the sub-network aggregation information collecting function and service arbitration function disclosed in the present invention, the network user can easily add new network services to the existing network structure. The method and device disclosed in the present invention support wired, wireless, IP-based and non-IP-based networks.

In various embodiments, a three-dimensional (3D) printed tripolar antenna fabricated through additive manufacturing techniques to match the geometries of various commercial wireless node packages is provided. The antenna systems are designed to mitigate harsh channel conditions by implementing polarization diversity between three mutually orthogonal monopoles.

A modal antenna array is described where modal antenna elements capable of generating multiple radiation modes are used to form array radiation patterns. Nulls in the array radiation pattern can be formed and positioned by proper modal antenna element mode selection, with these nulls used to provide interference suppression or mitigation. The shift in array radiation pattern maxima generated by modal element mode selection can be used to improve communication system link quality by optimizing array radiation pattern characteristics. Specifically, a ring or circular array configuration is described where a simplified common feed port can be implemented to feed multiple modal antenna elements used to form the array. A switch can be used to connect or disconnect one modal element from the array, with this feature providing additional unique array beam states. The modal array can be commanded via a look-up table or algorithm.

The invention relates to a minimum expected delay routing method of a duty cycle wireless sensor network, which solves the minimum expected delay routing problem of all nodes to sink nodes in the duty cycle wireless sensor network. The minimum expected delay time is the minimum expected delay time from any node in any time slot in the duty cycle wireless sensor network taking any neighbor node as the next-hop node to a base station; the minimum expected delay routing method comprises initialization and route update; initialization means initializing contents of all sensor node route tables and time slot competition tables; according to the hierarchical structure of the network, route update is gradually carried out layer by layer from the zero layer and is achieved by interaction of interlayer route update information, and the node selects the next-hop node according to the minimum expected delay time principle of the network. The method provided by the invention comprehensively considers sleeping schedule of nodes of the wireless sensor network, wireless link quality and node competition degree and has a greater message delivery rate and a shorter message gathering completion time.