178results about How to "Control overhead" patented technology

Various methods for managing device-to-device interference are provided. One example method includes receiving an expected interference level for a resource block, where the expected interference level is represented by data indicative of interference associated with the resource block due to device-to-device communications using the resource block. The example method further includes selecting the resource block for a device-to-device communications session based at least in part on the expected interference level for the resource block. Similar and related example methods and example apparatuses are also provided.

Dynamic varying of encrypting of a stream of data at an encryption unit based on data content is disclosed. The dynamic varying of the encrypting, which can be responsive to passage of a predefined number of units of physical data or passage of a predefined number of conceptual units of data, is accomplished by changing at least one encryption parameter over different portions of the data. The at least one encryption parameter can comprise one or more of an encryption key, an encryption granularity, an encryption density scale, an encryption density, an encryption delay, an encryption key update variable, and an encryption key update data trigger. The change in encryption parameter is signaled to a receiver's decryption unit and used by the decryption unit in decrypting the dynamically varied encrypted stream of data. The stream of data may comprise, e.g., MPEG compressed video or audio.

A scalable Media-on-Demand (MoD) method to a large group of users in the Internet. This method makes use of peer buffering capabilities to collaborate in the distribution and downloading of media, facilitated by a central repository for the search of optimal peers as parent nodes to connect to and for the support of advanced features such as fast forward and backward plays. The method relieves the server load by shifting the media streaming functionality to the client side with high media receiving continuity and quality, leading to well-balanced and low network loads.

A method and device for performing handover by a mobile terminal from a source base station to a target base station, the mobile terminal having a RRC layer, a RLC layer and an PDCP layer. The method includes receiving a handover initiation message; and performing handover from the source base station to the target base station, including reassembling RLC SDUs from at least one PDU when possible and delivering the reassembled RLC SDUs from the RLC layer to an upper layer.

A method for operating a first device-to-device (D2D) device in a cellular communications system includes receiving geo-location information from a first entity in the cellular communications system, the geo-location information including location information for cellular users of the cellular communications system and resources of the cellular communications system available to the cellular users, selecting one of the resources to avoid causing interference to a cellular transmission, the resource being selected in accordance with the geo-location information, and transmitting to a second D2D device over the selected resource.

A method for a multi-path source routing in a sensor network. In the sensor network including a sink node and a plurality of sensor nodes, the sensor network transmits data packets through a downlink route set based on a routing table generated by collecting uplink neighbor information of each sensor node from a control message for initializing a network and an uplink route formed by using uplink neighbors of each sensor node. Uplink neighbors for transmitting data from each sensor node to the sink node by performing a network initialization process and acquires the information in the sink node to generate the multi-path is maintained. As a result, it has advantages of reducing a control message overhead while using the multi-path and increasing scalability and energy efficiency by keeping a routing table small in the sensor node regardless of the size of the network.

Disclosed is a method for uplink transmission and reception in a wireless communication system and an apparatus therefor. Particularly, a method for performing uplink transmission by a user equipment (UE) in a wireless communication system includes: receiving sounding reference signal (SRS) resource configuration information form a base station, in which the SRS resource configuration information includes SRS resource information and association configuration information between a first SRS and a second SRS that is a target of the SRS resource configuration information; and transmitting precoded the second SRS to the base station on an SRS resource indicated by the SRS resource information, and the second SRS may be transmitted based on the precoding applied to the first SRS indicated by the association configuration information.

A wireless communication terminal apparatus wherein CoMP communication can normally be performed without increasing the overhead of an upstream line control channel. In this apparatus, a spreading unit (214) primarily spreads a response signal by use of a ZAC sequence established by a control unit (209). A spreading unit (217) secondarily spreads the response signal, to which CP has been added, by use of a block-wise spread code sequence established by the control unit (209). The control unit (209) controls, in accordance with sequence numbers and a hopping pattern established therein, the circular shift amount of the ZAC sequence to be used for the primary spread in the spreading unit (214) and the block-wise spread code sequence to be used for the secondary spread in the spreading unit (217). The hopping pattern established in the control unit (209) is a hopping pattern common to a plurality of base stations that CoMP-receive the response signal.

The invention discloses a routing method based on a delay tolerant network, and belongs to the field of computer network communication. The routing method includes: firstly defining message submitting probability based on connecting time and history meeting frequency of nodes with destination nodes corresponding to each message carried by the nodes, when a source node of a message meets another relay node, comparing the message submitting probability of the source node transmitting the message to the destination node with the message submitting probability of the relay node transmitting the message to the destination node, and selecting the node with the higher message submitting probability as a next carrier of the message; and sending the message step by step according to the way until the message reaches the destination node. With the routing method based on the delay tolerant network, the connecting time and the history meeting frequency of the nodes are both taken into consideration while the message submitting probability is calculated, so that the message submitting probability is increased; and the message submitting probability is taken as the basis of message forwarding, the message is always sent along the direction of high message submitting probability, and communication cost of the network is effectively reduced.

A transmitter includes an antenna array having a plurality of antennas for a wireless communication with one or more receivers, and a precoder connected to the antenna array, the precoder to apply a set of beamforming weights to the antenna array, the set of beamforming weights selected from a codebook to form by the antenna array one or more transmit / receive beams or nulls pointing in selected directions. The codebook includes a plurality of sets of beamforming weights for a plurality of directions. The beamforming weights in the codebook are based on a first antenna array response matrix, the first antenna array response matrix defined by a second antenna array response matrix and one or more characteristic matrices. The first antenna array response matrix contains first array response vectors of the antenna array, the second antenna array response matrix contains second array response vectors of another antenna array, the other antenna array being different from the antenna array, and the one or more characteristic matrices describing characteristics of the antenna array.

Provided are a system and a method for allocating resources in a communication system. The method includes mapping a Transmission Time Interval (TTI) class according to channel information transmitted from a mobile station and service class information of the mobile station; and allocating resources by dynamically configuring a frame based on the mapped TTI class.

A low-power media access control method of node dynamic sleeping includes the following steps: (1) organizing the network topology to clustering topology and realize a coarse-grained clock synchronization between the node inside the cluster and the cluster head and make the node work and sleep periodically; (2) the nodes have three operating modes: a sending mode, a receiving mode and a cycle work mode, wherein the node of the cycle work mode is characterized in that the nodes work or sleep periodically and the actual work and sleep time period of the nodes changes dynamically and the operation sub-time-period of the neighboring node can be calculated; (3) in one work cycle, the operation sub-time-period of any two adjacent nodes can be overlapped to guarantee the communication; (4) the node can intercept the packet sent by the adjacent node and adjust the sleep time period according to the information carried by the packet to reduce the carrier interception times; (5) dynamically adjusting the busy and idle degree of the node according to different data sampling rates so as to reduce the power consumption while guaranteeing the throughput. The method, which is simple and reliable, has advantages of low power consumption, short delay, strong adaptive capacity and effectively prolonged life cycle of the network.

A wireless communication network includes a plurality of peer nodes, the plurality of nodes communicating with each other through a control channel and a plurality of data channels, the communication method including: a source node in the plurality of nodes reserves a data channel used for transmitting data to a destination node in the plurality of nodes through the control channel; the source node and the destination node switch to the reserved data channel; the source node transmits the data to the destination node through the reserved data channel; and after the data transmission between the source node and the destination node is completed, the destination node sends a data transmitting success acknowledgement signal to the source node through the reserved data channel, and then both of the destination node and the source node switch to the control channel from the reserved data channel for operation.

A method of decoding encoded information communicated over a radio channel includes receiving a vector of encoded information transmitted by a wireless terminal. The encoded information includes an encoded representation of unencoded information bits that have been encoded using a first order Reed-Muller code. The method also includes generating a vector of transform values by performing a Hadamard Transform on the received vector and identifying a subset of the transform values based on scheduling information associated with the wireless terminal. Additionally, the method includes selecting, from the subset of transform values, one of the transform values based on a magnitude of the selected transform value and determining an estimate of the unencoded information bits based on a bit sequence associated with the selected transform value. In accordance with another embodiment of the present disclosure, an apparatus is operable to implement this method.

An application performance analyzer adapted to analyze the performance of one or more applications running on IT infrastructure, comprises: a data collection engine collecting performance metrics for one or more applications running on the IT infrastructure; an anomaly detection engine analyzing the performance metrics and detecting anomalies, i.e. performance metrics whose values deviate from historic values with a deviation that exceeds a predefined threshold; a correlation engine detecting dependencies between plural anomalies, and generating anomaly clusters, each anomaly cluster consisting of anomalies that are correlated through one or more of the dependencies; a ranking engine ranking anomalies within an anomaly cluster; and a source detection engine pinpointing a problem source from the lowest ranked anomaly in an anomaly cluster.

The invention discloses a wireless ad-hoc emergency communication network based on network cluster and message ferrying. The network comprises an emergency on-site command center (ECC), multiple emergency rescue special communication nodes (ECNs), a great quantity of ordinary communication nodes (OCNs) and a moderate number of ferrying nodes, wherein the ECC can be used as a command coordination node of the whole emergency communication network and a cluster node of the ECNs in the coverage area of the ECC; the ECNs can be used as cluster nodes of the OCNs in the coverage area of the ECNs; the cluster nodes and gateway nodes are interconnected to form wireless backbone networks (WBNs), the OCNs are connected with handy WBNs to which the OCN belong; and relay communication can be realized among the OCNs in different WBNs through the ferrying nodes. The communication network provided by the invention dynamically integrates the network cluster mechanism and the message ferrying mechanism, thus enhancing the reliability and timeliness of information delivery.

The invention discloses a network management method and system supporting elephant flow, a network switch and a communication network. The network management method supporting the elephant flow comprises the following steps: when the elephant flow is detected in the network, a source address and a target address of the elephant flow are extracted, a plurality of paths between the source address and the target address are acquired, and weight of corresponding paths which support the elephant flow is calculated according to network loads and network topologies of the paths; the network management system generates a forwarding table of the network switch and sends the forwarding table to the network switch, wherein the forwarding table comprises the weight of the corresponding paths which support the elephant flow and an operational order of the network switch, and therefore the network switch can execute the forwarding table and distribute the rate of the elephant flow according to the weight of the corresponding paths. By the adoption of the network management method and system, the flux of the communication network where the elephant flow exists can keep balanced, network performance is improved effectively, and the resource utilization rate is also increased effectively.

A concept for handovers in cellular networks, a concept for improved handling of tracking / paging areas for, for instance, user entities in inactive modes and a concept for enabling intelligent route selection in cellular networks are presented.

The invention concerns a data packet retransmission arrangement having a retransmission buffer, a counter, a forward error correction device and control logic. The retransmission buffer stores recently transmitted data packets. The counter keeps track of the number of retransmission requests received for a data packet (211). If this number is below a first integer value K, the data packet is retransmitted (212, 213). If this number is equal to or above the first integer value K, the forward error correction device calculates N forward error correction packets on L-1 recently transmitted data packets plus the data packet to be retransmitted (211), N being a second integer value equal to or larger than zero, and L being a third integer value equal to or larger than 1. In the latter case, the data packet is retransmitted together with the N forward error correction packets (214).

A method, apparatus, and computer program product, wherein a channel quality information received from a user in a multi-carrier transmission system is categorizing on a per-user basis, and one of a plurality of feedback overhead reduction techniques is individually selected for the user in response to a result of the channel categorization.

A processing method for group resource allocation comprises that: a base station establishes groups according to modulation and coding schemes and / or resource sizes (202), the modulation and coding schemes and / or resource sizes supported by the groups are static or quasi-static (204). With the present invention, the groups can be established based on modulation and coding schemes and / or resource sizes, and the modulation and coding schemes and / or resource sizes of the groups can be changed, compared with the prior art, the complexity of the group resource allocation method in the wireless communication system and the control overhead can be reduced, and the transmission bandwidth utilization of the wireless communication system can be improved.

The invention discloses an optimization method and an optimization system of on-line iteration compiling. The optimization method comprises the following steps that 100 a control module sends a source code or a compiler of the corresponding program in a mode of further optimized intermediate representation to a working module, and needed time of remaining data recording after processing is forecasted in a process that the program parallely processes the data recording stored in the working module; 200 the working module conducts iteration compiling optimization operation on the program and enables data of optimization results to be fed to the control module; and 300 operation time of the program and time of the iteration compiling optimization operation are stored in a performance data base which is used for storing pay expenses and income of all iteration compiling optimization operation to supply to the control module for use.

The invention discloses a piece of user equipment for wireless communication, a method and an apparatus in a base station. The user equipment transmits a first radio signal in a first channel, a firstbit block and a second bit block are used to generate the first radio signal, bits in the second bit block are a subset of bits in a third bit block, and transmission of the second bit block is determined by the user equipment itself. The invention has the advantages of simplifying the system realization of user-triggered reporting, improving the channel utilization efficiency, increasing the probability of user-triggered reporting, and controlling the air interface resource overhead.

A method allocating timeslots for transmission of data packets and REPORT messages in a communication network including plural logical links managed by a terminal, including: implemented at each cycle by the terminal receiving at least one REPORT message from at least one logical link, the REPORT message including an updated queue length expressed in timeslots of the logical link and, upon receiving the REPORT message, updating the image queue length, based on the updated queue length; allocating to logical links having non-zero image queue length at least one timeslot in a next cycle based on a theoretical transmission time for transmitting data packets or REPORT messages and based on a fraction of overhead associated with the transmission, until all timeslots of the next cycle are allocated or all image queue lengths are zero, and incrementing the theoretical transmission time of each logical link based on its required minimum bit rate.

A resource allocation method and apparatus for an OFDMA-based mobile communication system that allows allocating resources of multiple carriers is provided. A Physical Downlink Control Channel (PDCCH) transmission method for allocating resources in multiple frequency bands of a mobile communication system based on an Orthogonal Frequency Division Multiple Access (OFDMA) according to the present invention includes generating and transmitting, at a base station, multiple PDCCHs for allocating resources in the multiple frequency bands using Control Channel Element (CCE) indices; and receiving and demodulating, at a user equipment, the multiple PDCCHs transmitted by the base station and locating the resources allocated in the multiple frequency bands using the CCE indices of respective PDCCHs. A Physical Downlink Control Channel (PDCCH) transmission apparatus for allocating resources in multiple frequency bands of a mobile communication system based on an Orthogonal Frequency Division Multiple Access (OFDMA) according to the present invention includes a base station apparatus which generates and transmits multiple PDCCHs for allocating resources in the multiple frequency bands using Control Channel Element (CCE) indices; and a user equipment which receives and demodulates the multiple PDCCHs transmitted by the base station and locates the resources allocated in the multiple frequency bands using the CCE indices of respective PDCCHs.

In a software distribution unit, a binary-code analysis unit determines a total set of insertion positions at which probes can be inserted into software. A binary-code change unit determines the population of insertion positions of probes to be inserted into the software and the number of insertion positions of probes to be inserted on a device basis. Then, the binary-code change unit selects, from the population, insertion positions of probes as many as the determined number of insertion positions and inserts the probes into the software at the selected insertion positions. A software distribution unit distributes, to the device, the software into which the probes are inserted. As a result, it is possible to reduce both a load on the device side and a load on the software developer side at the same time and to acquire uniform debug information without deviations.

The invention relates to a method and a device for processing multiple runtime environment data. The method includes: creating runtime environment data corresponding to each network application program according to the starting sequence of multiple network application programs. The method has the advantages that the runtime environment data corresponding to the current application programs is acquired from the created runtime environment data so as to solve the problem of collision during public runtime environment data operation or calling performed by multiple Web Apps when multiple Web App public runtime environment data exists in the prior art, runtime quality of the Web Apps is increased, the first-in first-out strategies dynamically keeps the number constancy of runtime environment data, system expense is controlled, system operation efficiency is increased, local function calling of the Web Apps is achieved by the JsBridge communication protocol, and practicality of the Web Apps is increased.