352results about How to "Reduce the probability of conflict" patented technology

The invention discloses uplink transmission method and device based on competition. A network side notifies a terminal of one or a plurality of shared resource marks CB-RNTI and sends uplink dispatch authorization signalling (s) which correspond to the one or the plurality of shared resource marks CB-RNTI to the terminal, wherein the uplink dispatch authorization signalling(s) is (are) used for notifying resources allocated by the terminal and used for CB uplink transmission; the resources are positioned between resource employed by the uplink dispatch authorization signallings and resources employed by frequency hopping; and the one or the plurality of shared resource marks CB-RNTI is or are in on-to-one correspondence with the uplink dispatch authorization signalling(s); and the terminal carries out the CB uplink transmission through the resources. The invention reduces the PDCCH overhead and the probability of terminal conflict, mitigates the load of a PDCCH public searching space, also reduces the influence on frequency domain dispatch or PUSCH frequency hopping, and enhances the integral property of the uplink signal sending scheme based on the competition.

The invention discloses a resource allocation method, which comprises the following steps: when user equipment meets a transmission time interval TTI bundling condition, receiving a radio resource control signaling message transmitted by a base station, wherein the message carries TTI bundling information and first uplink static resource allocation information; performing TTI bundling setting according to the TTI bundling information, wherein the TTI bundling information comprises a TTI bundling setting indication; and reallocating uplink static resources according to the first uplink static resource allocation information. The invention also provides a corresponding device and a corresponding system. In the method, the device and the system, the resource allocation information and the TTIbundling information carried in radio resource control RRC signaling are transmitted together to the user equipment to perform the TTI bundling setting and the corresponding static resource reallocation, so the probability of conflict caused by PDCCH loss can be reduced, and resources can be timely and reliably allocated to improve the performance of the system.

The invention discloses a wireless resource selecting method and terminal device wherein the method comprises the following steps. A piece of user equipment (UE) chooses a target resource wherein the target resource is used to send a wireless signal. Based on the chosen target resource, the wireless signal is sent. The chosen target resource of the UE comprises at least one of the following: a target resource chosen according to the intercepting result of a wireless signal; and a target resource chosen according to the perception result of an occupied signal. The target resource is arbitrarily selected.

A fast flow classification method based on keyword decomposition hash algorithm relates to network flow measurement technology. The data blocks of multiple keywords of the packet head are connected into an integral binary string, and then the binary string is divided into a series of data blocks, the binary strings of the series of data blocks and prime numbers are performed with exclusion OR to obtain hash key values, the hash key values are processed by the hash function to obtain the matching rule set which is stored in a hush bucket, each matching rule set is simplified to a hash matched value stored in a matched linked list; the hash matched value is used as the index value of the linked list under query, the captured packets from the network receive keyword decomposition and hash value computation, and also perform quick flow matching with the rule sets in the hash bucket. The invention supports multiple keywords, is applicable to various classification modes, has high speed, low collision rate and is applicable to high speed network flow measurement.

The invention discloses a method for controlling channel access of a wireless sensor network. A base station node and each sensor node adopt a time frame structure with different lengths of time frame, so that the sensor nodes can reserve different time slots by dispatching to carry out data packet transmission, thereby not only reducing collision probability of forwarding data packets among sensor nodes in a high-density monitoring area and improving the utilization rate of wireless channel, but also effectively avoiding overhearing in the wireless sensor network and frequent status switching of a transceiver; therefore, the sensor nodes can be in dormancy status as fully as possible during idle transmission so as to greatly reduce energy consumption under the high-loading network condition and have good energy efficiency. A path reserve mechanism can reserve a multi-hop time slot in advance along data packet forwarding direction in time slot reservation phase, according to the time frame synchronizing characteristics of the sensor nodes on a forwarding path, thereby effectively avoiding end-to-end transmission delay of single data packet caused by intermittent transmission of data packets on the forwarding path.

The invention provides an inter-cell interference coordination method and a device in a heterogeneous network. The method comprises the steps of configuring a limited interference source selection threshold and an interference contrast threshold according to parameter configuration of the limited interference source selection threshold and the interference contrast threshold, which are selected by a base station; measuring adjacent cell interference and reporting to the base station; and using the base station to contrast interference measured value with the interference contrast threshold, when the measured value is greater than the threshold, using the base station to determine interference coordinate strategy according to the contrast result between the measured values of the base stations and the user sides in different types in the heterogeneous network and the interference contrast threshold. By adopting the technical scheme, the inter-cell interference can be effectively reduced.

The invention discloses a three-dimensional virtual resource scheduling method of cloud computing energy consumption key. The method comprises the following steps: step 1, performing virtual resource allocation; step 2, performing overload host detection, and detecting each physical host of a cloud data center by adopting a multi-dimensional host overload detection method to judge whether the physical host is overload; step 3, performing migration virtual machine selection, and selecting a to-be-migrated virtual machine by adopting a virtual machine selection method; step 4, selecting a target host, and selecting a new physical host mode for each migrated virtual machine by adopting a target node selection method; and step 5, performing virtual resource optimization to further reduce the energy consumption. According to the three-dimensional virtual resource scheduling method disclosed by the invention, how to effectively reduce the energy consumption of the data center is fully considered from the three dimensions of CPU, memory and network bandwidth, so that the virtual resources of the cloud computing data center are efficiently scheduled and managed, the resource utilization rate is improved, and the energy consumption of the data center is effectively reduced.

The invention relates to the communication field and discloses a PUCCH (physical uplink control channel) resource determination method and apparatus. The method comprises the following steps: based on PUCCH resource initial positions notified at a network side and sizes of dynamic PUCCH resource areas, UE determines, through frequency hopping patterns agreed at the network side, distributed PUCCH resources within the dynamic PUCCH resource areas via a frequency hopping mode. Therefore, the sizes of dynamic PUCCH resource areas are effectively reduced, resource spending is reduced, and probabilities of conflicts among PUCCH resources of different kinds of UE are minimized. Meanwhile, the utilization rate of PUCCH resources is effectively increased, orthogonal PUCCH transmission among districts is supported, and then the PUCCH transmission performance is substantially improved.

The invention provides a method of fast finding fixing and matching an access control list, comprising: serializing information character strings in all matching fields of ACL rule to be arranged, initializing hash table [MAX LEN] table; using the ACL rule character string sequence as a Key of a hash function, carrying corresponding character string Key and hash basket size prime into the function for computation, obtaining has function hashed value (index); indexing corresponding items of the ACL rule in the hash_table according to the computing result. According to the invention, hash algorithm is simple, efficiency is high, hash distributing performance is excellent. In addition, a chain table is maintained for HASH table, a method of storing all conflicting list items can better solve the problem of balancing space and time in practical application, thereby excellently advancing system efficiency without wasting huge space.

The invention a network processor-based route searching result caching method, belonging to computer field, characterized in: building and maintaining a route searching result caching table in on-chip high speed memory of the network processor; after each to-be-searched destination IP address is received by the network processor, firstly making fast searching in the caching list by Hash function; if its result has existed in the caching list, directly returning the route searching result and regulating the sequence of items in the caching list by a rule that the closer an item is, the least it is used, to find the result as soon as possible in the follow-up searching; otherwise searching the route list stored in an outside-chip low speed memory, returning the searching result to application program and writing the searching result back into the caching list. And the invention reduces number of accessing times of outside-chip low speed memory for route searching and reducing occupation of memory bandwidth.

The embodiment of the invention discloses a random access resource configuration method and device and relates to the technical field of communication, wherein the method and device provided by the invention can be used for reducing the probability of collisions when intragroup MTC (Machine Type communications) equipment is randomly accessed into a network. The method comprises the following steps: receiving a first message containing a target group identifier and number parameters of MTC terminals sent by an MME (mobility management entity), wherein the target group identifier is used for identifying a target group, and the number parameters of the MTC terminals are used for representing the number of MTC terminals belonging to the target group in a cell; adjusting random access resources according to the number parameters of the MTC terminals in the first message; and sending a second message to all the MTC terminals belonging to the target group identifier in the cell, wherein the second message is used for indicating that the MTC terminals are selected and accessed from the adjusted random access resources. The method and device provided by the embodiment of the invention is mainly used in the technical field of communication.

The present invention discloses a wireless sensor network energy conservation method which is designed basing on the cross-layer, a MCU Active mode and a MCU Sleep mode are arranged on the processor MCU in the wireless sensor network, an ADC Active mode and an ADC Sleep mode are arranged on an analog-to-digital converter ADC, a MTRU Sleep mode, a WTRU Tx mode and a WTRU Rx mode are arranged on a wireless date sending module / receiving module respectively, and sent from a surveillance center according to the control command designed by the primitive to control the accesses of the different modes after being sent by the processor MCU, so as to conduct a cross-layer energy conservation optimization from an application layer, a network layer, a link layer and a physical layer of the wireless sensor network. Under the premise of not influencing the application performance and function, the present invention reaches the effect of reducing the whole energy consumption of the nodes, and greatly prolongs the use life of the batteries used on the nodes and greatly lengthens the life span of the network.

The invention provides a method of a contention access channel. A network node confirms a priority group partition coefficient of the network node according to a media access control (MAC) address of the network node or the number of network nodes in the upper level monitored by the network node, confirming a priority group of the network node through the priority group partition coefficient, and starting the contention access channel at an access moment corresponding to the priority group of the network node or when an access moment corresponding to a previous priority group of the priority group of the network node comes. Namely, due to the adoption of the above-mentioned priority group partition method, network nodes are divided into different priority groups, a node of each priority group enters the contention access channel when the access moment is confirmed to come, the number of the network nodes which start the contention access channel at the same moment is reduced, and the probability of conflicts in the process of networking is further reduced.

A method for checking overtricks of high speed network flow in time comprises: arranging three data structures and three processes, wherein the three data structures are respectively a Bloom Filter data structure, a counting-type Bloom Filter data structure and a hash link-table data structure. The Bloom Filter data structure can be used to record information which is existed in the flow, the counting type Bloom Filter data structure is used to record fluxion information of aggregation points, the hash link-table data structure is used to record overtrick marks and overtrick fluxion information, the three processes are respectively a new-flow checking process which is based on Bloom Filter, an overtrick checking process which is based on counting type Bloom Filter and an overtrick information recording process which is based on a hash link-table. When message reaches to a measurer, firstly, looking up if the message is a new flow or not in the Bloom Filter data structure, looking up if an aggregation point of the new flow is the overtrick or not in the counting type Bloom Filter data structure if the message is the new flow, and recording mark information and fluxion information of the overtrick in the hash link-table data structure if the new flow is the overtrick. The invention can directly check out the overtrick information in time, saves the consumption of measuring resources, and increases the checking preciseness of the overtrick fluxion.

The invention discloses a physical cell identification (PCI) allocation method and a system. The method comprises: obtaining base station information and initial PCI information of all physical cells, and adjacency information among the physical cells; building a PCI planning model based on the base station information of the physical cells and the adjacency information among the physical cells, and forming the PCI planning model, wherein the constraint condition of the PCI planning model includes that the models 3 of adjacent physical cells are different, and an objective function of the PCI planning model includes a maximum PCI multiplexing distance function; using the initial PCI information of the physical cells as a variable of the PCI planning model, solving the PCI planning model, and obtaining the optimal PCI information of the physical cells; and allocating PCI for the physical cells according the optimal PCI information. By implementation of the method and the system in the invention, PCI conflicts are prevented, and the multiplexing distance of identical PCI is ensured to the largest, thereby further reducing the occurrence rate of the PCI conflicts.

The invention discloses a method for improving electron label reading efficiency based on power control. The method comprises the following steps: A. setting an initial value of transmitting power of a reader antenna; B. determining whether the current transmitting power of the reader antenna is greater than the maximum of the transmitting power of the reader antenna, if yes, stopping the recognition process, and if no, carrying out a step C; C. reading the electron label by the reader; D. determining whether there is an unread electron label in an action range of the reader, if yes, carrying out the step C, and if no, carrying out a step E; and E. improving the transmitting power of the reader antenna and returning to the step B. The method in the invention reduces the quantity of the electron labels to be identified in the same identification frame by grouping the electron labels, thereby improving the reading efficiency of the electron label. Compared with other anti-collision algorithms that change algorithm designs, reader and the electron label communication protocols or hardware structures, the method provided in the invention is easier to realize. Furthermore, setting can be changed according to a practical situation in the method, so that the method has a great degree of freedom.

The invention provides a method for controlling a communication bus for solving the problem of great collision occurrence probability caused by traditional technological methods. The method comprises the following steps: generating mutually different delay times on at least two line cards; delaying according to the mutually different delay times when detecting that the communication bus is idle by line cards with communication requests; and preempting the current idle communication bus by the line cards with the communication requests according to the respective delay times and sending data to the communication bus. The invention also provides a device for controlling the communication bus. The method and the device lower the collision probability of the bus to a maximum extent, reduces the data packet loss ratio caused by collision, improves the working stability of the bus and enables corresponding equipment to work more reliable and stable.

The embodiment of the invention discloses a distributed OFDMA random access method, an AP (access point) and user equipment STA, and the method can effectively reduce the completion conflict rate and effectively shorten the competition access time. According to the invention, the method comprises the steps that the AP calculates a competition window initial value CWini according to the number N of pieces of correlated user equipment STA and the number of RUs (resource units), so as to enable CWini to serve as a dynamically-changing more reasonable competition time window value; the AP broadcasts the CWine, so as to enable the STA correlates with the AP to participate in the competition according to the CWini. Therefore, the CWini serves as the dynamically-changing more reasonable competition time window value, the conflict rate of competition can be effectively reduced, the bandwidth resources can be effectively used, the system throughput can be increased, and the competition access time can be effectively shortened.

The embodiment of the invention discloses a method and a system for allocating physical cell identifiers (PCI), which can greatly reduce the probability of PCI conflicts and realize automatic configuration of the PCI. The method provided by the embodiment comprises the following steps of: allocating a temporary PCI to a newly-activated cell from a first PCI list; performing automatic neighborhood relation (ANR) detection by the newly-activated cell to acquire an operation PCI used by a neighborhood of the newly-activated cell, wherein the newly-activated cell comprises a direct neighborhood and a direct neighborhood of the direct neighborhood; and allocating a PCI different from the operation PCI used by the neighborhood to the newly-activated cell from a second PCI list, wherein the PCIs in the first PCI list are different from that in the second PCI list.

The invention provides a random access method. The method comprises: a network device determining a first channel access type that should be adopted when a terminal device accesses a first unlicensedfrequency band, the first channel access type belonging to one of channel access types of unlicensed frequency bands, the channel access type of the unlicensed frequency band comprising an FBE and a load-based device LBE; and the network device sending a first system message to the terminal device, the first system message carrying first indication information, and the first indication informationbeing used for indicating the first channel access type; and the terminal device acquiring the first system message from the network device, and accessing the first unlicensed frequency band by adopting the first channel access type indicated by the first indication information.

The invention discloses a method for building quantum channels and transmitting quantum information in a wireless self-organizing quantum communication network, comprising the following steps of: (1) performing entanglement exchange from the adjacent nodes of a source node and a destination node, and transmitting the measurement results to the next node along the direction of the middle node; (2) judging whether receiving the measurement results coming from two directions by the node; (3) respectively transmitting the particle entanglement states of the source node and the destination node corresponding to the measurement to the destination node and the source node by the node through wireless channels; and (4) after receiving the measurement results, transmitting the quantum states of the carried information through quantum remote teleportation by the source node so that the quantum states of the carried information can be transmitted to the destination node. The method provided by the invention can obviously save the cost of wireless transmission for building the quantum channels and transmitting the quantum information, can reduce the data packets to be transmitted by the wireless channels, and can reduce the collision probability of the data packets in the wireless channels.

The present invention discloses an uplink resource distribution method, a base station and a user terminal. The method comprises: the base station obtains resource distribution information for indicating how to perform uplink resource distribution; and the uplink transmission indication information is sent to a user side according to the obtained resource distribution information. According to the technical scheme, prior to the uplink data transmission at the user side, through consideration of the number of the minimum uplink scheduling users and the LBT transmission success rate, the users with the high LBT transmission success rate are selected as possible to be dispatched users, on the premise of ensuring the fairness, the waste of the uplink resource can be avoided as much as possible, and the LBT conflict probability is reduced and the user waiting time delay is decreased so as to improve the channel capacity.

The invention relates to a wireless sensor network consistency time synchronization method for reducing network traffic, belonging to the field of wireless networks. The method aims at a clustering wireless sensor network and divides a synchronization process into three steps, i.e., first time synchronization within clusters, time synchronization between the clusters, and time resynchronization within the clusters. The first synchronization within the clusters and the resynchronization within the clusters use a maximum consistency time synchronization method and only need four-time and two-time communications respectively; in the synchronization between the clusters, all cluster heads are synchronized by adopting a maximum consistency method, and the exchange of cluster head messages is implemented by means of the message forwarding of gateway nodes. Therefore, in the process of synchronization between the clusters, common nodes in the clusters do not need communication; compared withthe existing method which requires nodes in the clusters to broadcast or reply to messages in each period, the wireless sensor network consistency time synchronization method can effectively reduce the communication traffic between the nodes and accelerate the convergence speed in a synchronization process, thus prolonging the network lifetime of the nodes.

The invention relates to a data storage and query method based on matrix hashes. The method comprises the steps that 1), a hash table data structure is established, wherein the structure comprises z child tables, z is an even number, and the sizes of the child tables decrease progressively in equal difference; for 1<=i<= , the i child table is combined with the (z-i+1) child table to obtain child tables with the same size; 2), an auxiliary data structure is established, wherein the structure comprises z Bloom filters corresponding to the z child tables, and the sizes of the Bloom filters decrease progressively in equal difference; for 1<=i<= , the i Bloom filter is combined with the (z-i+1) Bloom filter to obtain Bloom filters with the same size, and the Bloom filtersare added together to form a multi-bit Bloom filter; 3), a key-value pair is inserted by using the hash table data structure and the auxiliary data structure to achieve data storage. By means of themethod, rapid update and rapid query can be achieved.

The invention discloses a mobile communication node networking control method based on a directional antenna. In the invention, a communication connection is established between the mobile nodes by using a bi-directional neighbor discovery method, and then the synchronous communication time is distributed to the mobile node and the neighbor node by using the TRC method, so as to maintain the communication connection between the mobile nodes; subsequently, during a period T2, the synchronous communication between the nodes is controlled by using a synchronous time control method so as to keep the communication connection between the nodes, and then the communication time is distributed to the mobile nodes by using the DTRC method; and finally, in a period T3, the communication between the nodes is controlled by using the bi-directional communication control method, and data exchange between the nodes is realized by using a data transmission control method, so as to realize communication between the nodes. The invention adopts a directional antenna to receive and send communication, and therefore, the communication distance between two parties is increased, the communication efficiency is improved, the conflict probability of the channels during the communication between the nodes is reduced, and the channel utilization rate and the communication efficiency are improved.

The invention provides a scheduling method to prevent conflicts in intelligent RFID read system. The method utilize the mechanism that reader controls multiple antennas, which is: all the antennas are controlled by the reader in order; the reader polls the antennas connected to the reader, and control the interactive between the single antenna and label; each time only one antenna can be activated to respond instructions from the reader; every two antenna effective covered regions are connected to reduce the overlap. The invention uses multiple antennas, at any time only one antenna takes effect, and then labels are divided into groups to recognize. The number of labels in the coverage covered by one antenna is reduced, thus the probability of conflicts is effectively reduced.

The invention discloses a method and a device for solving the problem of hidden nodes in local area network. The method comprises the steps of: setting a virtual independent AP for each related mobile terminal STA; and sending a Beacon frame to each mobile terminal STA individually, wherein a Quiet information unit is carried by the Beacon frame of each STA, thereby enabling different mobile terminal STAs to remain silent in different time ranges of one Beacon cycle, reducing the number of the mobile terminal STAs accessing the AP channel simultaneously, reducing the channel access conflict probability among the STAs, and improving the whole performance of the wireless local area network.

The invention provides an initial access and random access method based on multiple antenna ports and multiple beams, base station equipment and user equipment. The initial access and random access method based on multiple antenna ports and multiple beams comprises the following steps: sending, by the base station equipment, a synchronous signal sequence to the user equipment on at least two basestation beams with correlation; receiving a preamble sequence sent by the user equipment on the at least two base station beams with correlation; determining a base station beam direction having the maximum energy and an angle deviation of the base station beam direction based on the preamble sequence; adjusting the base station beams according to the base station beam direction having the maximumenergy and the angle deviation of the base station beam direction; and sending and receiving data with the user equipment through the adjusted base station beams. According to the initial access andrandom access method based on multiple antenna ports and multiple beams provided by the invention, initial access data are sent to the user equipment on the at least two base station beams with correlation in an initial access process, therefore the optimal beam direction of the base station side can be determined more quickly, and meanwhile the conflict probability is reduced.

Embodiments of the invention disclose a multi-user abrupt discontinuous low-rate service transmission method and a device. The method comprises the steps as follows: when determining that a current to-be-transmitted service is a multi-user abrupt discontinuous low-rate service, combining abrupt discontinuous low-rate service data of multiple users and assigning TB resources to the combined abrupt discontinuous low-rate service data; using the same MCS to assign a code word to each TB resource; carrying out spatial transmission diversity-multiplexing of the TBs after code word assigning, carrying the TBs on a data channel, and generating a control channel corresponding to the data channel; and carrying out transmission of the data channel and the control channel at an air interface. By aggregating the air-interface physical resource blocks occupied by abrupt discontinuous low-rate service, the conflict probability of the control channel is lowered, and resource fragmentation is reduced.

The invention discloses a wireless sensor network data aggregation method. Because the energy of a wireless sensor network of which energy is supplied by micro batteries is limited, once the energy of a certain sensor node in the network is used up, the node will be ineffective, and the communication condition of the whole network will be influenced. According to the method, node scheduling, data prediction and a data aggregation algorithm are combined by using a wireless sensor network data aggregation scheme based on a spatial autocorrelation model; ordinary nodes with relatively low residual energy are scheduled to sleep; moreover, on the basis of data correlation between adjacent nodes of the wireless sensor network, missing data of the sleep nodes is predicted by using a Delaunay triangulation algorithm and the spatial autocorrelation model; and finally aggregation operation is carried out by a cluster head node. According to the method provided by the invention, the data precision is ensured; moreover, transmission of intra-cluster redundant data is reduced; the energy consumption of the sensor nodes is reduced; and the service life of the network is effectively prolonged.