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

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.

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.

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.

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.

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 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 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.