40 results about "Channel reuse" patented technology

The invention relates to a cognitive radio (CR) WiFi network which includes a plurality of radio environment aware WiFi terminals, which collect local WiFi interference information and send this information to a CR network management system (NMS). The CR NMS includes a database for storing historical records of the interference information obtained from the terminals, and cognitive engines for analyzing the stored historical interference records and determining terminal-specific transmission and reception parameters. In one embodiment the network implements a deterministic NMS-directed networks-wide TDD / TDM scheduling of WiFi communications for optimal channel re-use and interference avoidance, and a novel terminal synchronization mechanism.

Multi-carrier point-to-multi-point CDMA system implementation reduces hardware changes in legacy single-carrier systems. The number of common downlink channels, such as timing / synchronization and paging channels, is reduced by designating an anchor carrier for transmitting these channels. Procedures for adding carriers and carrier acquisition are simplified through common carrier timing, signaling by the network to the user equipment (UE) of timing offsets and scrambling code selection, and other measures. Channel reuse is employed to minimize changes in asymmetric systems with different numbers of uplink and downlink carriers. Channel Quality Indicator (CQI) field is divided into multiple subfields to enable transmission of multiple CQIs and ACK / NACK indicators on one uplink carrier.; Joint and separate scheduling schemes are shown for concurrent scheduling of a data stream transmission to a UE via multiple downlink carriers.

The invention discloses a resource reuse method and a resource reuse system for improving the energy efficiency of a D2D (device-to-device) system. The method comprises the following steps that 1, the position estimation is carried out on the emitting end and the receiving end of D2D user pairs, and the position information is obtained; 2, whether the distance from the sending end to the receiving end is greater than the threshold value or not is judged according to the position information, when the distance is greater than the threshold value, the current timeslot idle cellular users are selected to be used as a relay node, in addition, the operation enters the third step, and otherwise, the operation directly enters the third step; 3, the cellular users with resources distributed by a base station and each group of D2D users are respectively combined, and an energy efficiency matrix and a velocity matrix are built; 4, the resource reuse decision making is carried out on the basis of the preset criterion, and the channel reuse matrix is obtained through solving; 5, the reuse cellular users of each group of D2D user pairs and the corresponding optimum emitting velocity are determined. The resource reuse can be carried out at the same time as the expenditure reduction realization only according to the position information of users in a cell, and the total energy efficiency of a communication system is improved.

Disclosed is a scalable, hybrid mobile network termed the Metropolitan Area Mobile Network (MAMN) based on a new dynamic mobile network protocol-DynaMo. DynaMo supports TCP / IP based communication between nodes, whether they are moving or stationary. DynaMo is a location-based routing technique that integrates MAMN, with wired TCP / IP networks (such as the Internet). Through the disclosed use of a modified Domain Name Services (DNS), communication between wired and wireless nodes, moving or stationary, is supported and is transparent to the end-user. DynaMo supports the use of multiple channels and implements a scheme for channel reuse. A hybrid encryption mechanism, based on public / private key pairs enables signed and secure communication.

A base station for a wireless network has multiple channels for communicating with user equipments, and has multiple channel reuse patterns. The patterns are complementary such that areas of low carrier to interference ratio C / I of one pattern are not coincident with areas of low C / I of other patterns. An allocator allocates channels such that for user equipment located in an area of low C / I of any of the complementary patterns, the allocator favors allocation of a channel of another of the complementary patterns. The sacrifice of capacity can be reduced as there is less need for a capacity-hungry high re-use factor pattern. The channels may be frequencies, time slots or CDMA codes. The reuse patterns can involve reuse on selected base stations, or on selected sectors, or different polarizations. The network can be of any type including fixed wireless access FWA, or mobile networks.

A system and method is disclosed allowing a cable network provider to dynamically allocate a network resource, in the form of channel bandwidth, for conveying either analog or digital assets. Certain assets are distributed in a cable network in an analog manner but only during certain time periods. The network resources could be used for offering digital services at other times. A programmable RF switch allows network resources to be switched to convey digital assets when the analog channels are not required. The digital assets conveyed may comprise movies, games, or music and can be transferred during ‘off-hours’ for local storage in the set top box in anticipation of future requests by a user. When the asset is requested, the set top box first checks if the asset is locally available, and if so, spools it out locally.

A computing system in which devices communicate wirelessly as secondary users in a band assigned to primary users. The computers communicate using new signals developed to reduce disruption to primary users of the band. The new signals may be produced by sensing, or otherwise determining, signals used by primary users and developing signals using a modulation scheme or other signal parameters that provides little disruption to primary users. These techniques make available to users unused and / or underused portions of the radio spectrum, such as whitespaces between television channels. The new signals may be generated by software defined radios within the computing devices or by switching between modulation schemes supported by conventional wireless network interface card.

Dynamic channel reuse in multi-access communication systems. A first station in a communication network may receive a transmission over a communication medium. The first station may generate a reuse determination based on information from the received transmission. The reuse determination may be usable with at least one other reuse determination to coordinate reuse of the communication medium.

Apparatus, and an associated method, for allocating channels within a cell of a cellular communication system. Allocations are made by an allocator based upon determinations made by a determiner of the likelihood of movement of the mobile station. Determinations made by the determiner are made responsive to analyses of indicia of prior movement behavior of the mobile station stored at a home location register associated with the mobile station. Channel reuse is effectuated if the mobile station is determined to be stationary or moving at a speed less than a selected threshold. Otherwise, uniquely-assigned channels are allocated to the mobile station.

Embodiments of the invention disclose an incremental upgrading method and a server using the incremental upgrading method. The incremental upgrading method comprises the following steps: comparing old version files of publishing channels before generating increment files so as to obtain a difference file set; generating corresponding increment files according to the difference file set and a target file; sending the increment files to a client so as to incrementally upgrade the old version file, from any publishing channel, used by the client to the target file. Therefore, when the incremental upgrading method is used for realizing incremental upgrading, the files with same version and different publishing channels reuse a same increment file, and the increment files do not need to be preset in allusion to the old version file of each publishing channel or the required increment files do not need to be temporarily calculated when the client requests incremental upgrading, so that not only the storage space of the server can be saved, but the incremental upgrading efficiency also can be improved.

The invention discloses one interface point signal selection method, which comprises the following steps: a, interface point gets nearby interface point signal channel for usage information; then according to signal transmission consumption to nearby interface point relative distance information; finally combining signal channel usage information and relative distance interface usage signal channel. The invention also discloses one interface device referring signal channel and distance factors on interface point use signal for selection.

There is disclosed a system and method for improving wireless system capacity by reducing collisions where the Signal to Interference Ratio (SIR) is high in systems having a channel reuse of 1. By ordering the channel assignment in each of the interfering cells according to a pattern, for example, according to the distance from a base station (determined by power levels), the mobile stations will become paired on the same channel in a manner to reduce interference between them. In one embodiment, this intelligent assignment is accomplished by assigning mobile stations in one cell such that the mobile station having the strongest signal is assigned channel A while in the interfering cell the mobile station with the weakest signal is assigned to channel A. In another embodiment, certain preferred mobile stations are assigned either interference-free channels or channels paired with weak interference mobile stations.

The invention relates to a device and a method of realizing low complexity of the base band forming SRRC digital filter. The device comprises the following: a double channel reuse tap delay line unit delays a double channel composite input signal to obtain an input vector x; an order inverting unit inverts the order of the input vector x; an input strobing unit time-sharing strobes the input vector x and an order inverted vector x`; a number of M weighted sum units reuse in time division a weighted sum arithmetic device of the x and a half coefficient hia of a sub-filter, and the x` and the half coefficient hia of the sub-filter; after a summation delaying unit completes setting delaying of the output of the x`. hia operation, the summation delaying unit sums with the output of the x. hia operation which is synchronous with the x`. hia operation; and an adapter unit time-sharing strobes the filter operation result of each sub-filter to obtain a double channel forming filter result of the SRRC digital filter. The device retrenches the length of the tap delay line as 1 / (2M) of the original length, so the hardware resources needed by the base band forming SRRC digital filter to realize low complexity are remarkably reduced, the complexity is lowered, the filter operation can work in lower frequency, and the aim that I / Q double channel reuse the same filter device is realized.

The invention discloses a channel reuse method of the third generation mobile communication long-term evolution system. The invention, which relates to channel reuse technology, is put forward to solve the unclear channel control of the LTE system. The adopted technology scheme is as follow: the control channel is arranged in the anterior symbols of the sub frame, the traffic channel is arranged in the rest sub frame symbols; A diversity mode is adopted to control the channel to send system control information, and the reuse mode is adopted to send business data on the traffic channel. The invention also discloses a device to realize the method. Not only can the reliability of sending system control information be ensured, but also the transmission rate of the business data is higher. Arranging the control channel in the anterior symbols of the sub frame is beneficial to reduce the UE receiving delay.

The invention provides a satellite communication system channel reuse method. Two signal transmission paths, which are respectively an I path and a Q path, are provided; the I path sends one continuous signal frame in each second, and the continuous signal frame structure comprises a frame head, an information frame, a Q path parameter frame and a verification frame; a Q path information rate is determined by the Q path parameter frame in the I path, and a Q path signal frame structure comprises a frame head, a signal frame, a frame type and an ending frame; and after carrier wave modulation is carried out on digital signals of the I path and the Q path, merging emission is performed. According to the invention, the characteristics of in-phase orthogonal modulation are utilized, the signals of the I path and the Q path respectively transmit two paths of data, and a continuous business concurrent reuse channel or a continuous business and burst business concurrent reuse channel is realized; in addition, if the continuous business and the burst business are concurrent, the burst mode is adopted by the signals of one path, the path is of a time division multiplexing type, and other information can be burst, so that the utilization rate of channel resources is further improved.

Dynamic channel allocation (DCA) is adopted in the indention. When new call arrives to system, as long as there is a one vacant channel, mobile control center allocates the channel to the call. After the call is ended, the channel is returned back to central storage area. The invention solves technique issue for quick accessing channel and raises quality of service of mobile communication. Features are: avoiding interference, minimized distance of reusing channel, using wireless resources in high efficiency and increasing system capacity.

A method and system for creating and deploying a mesh network are disclosed. In one embodiment, the method comprises providing a mesh router having a plurality of radios. The mesh router is used in a cell of a plurality of cells that covers a geographic region. Channels are assigned to the plurality of radios. The channels are selected from a plurality of channels to allow channel reuse throughout the plurality of cells.

The invention provides a data transmission method, the method can be applied to a wireless link machine, and the wireless link machine can set a plurality of data transmission channels in a system communication link and save the channels to a data transmission channel reuse periodic table in sequence; and the method comprises the steps: data transmitted in the system communication link is received; a data transmission channel for receiving the data is recognized; according to the data transmission channel of the data, a next data transmission channel of the data transmission channel for receiving the data in the data transmission channel reuse periodic table is set as a data transmission channel for transmitting the data; and the data is transmitted through the data transmission channel for transmitting the data. According to the technical scheme of the invention, a plurality of wireless link machines occupies channels to transmit the data according to a set sequence without disturbing with each other, and multi-stage extending and covering demand can be met.

A Joint coding method and a coding device which are used in physical control channel reuse, before multi-channel control signaling is reused and channel coded by the method, wherein the 2-bit signaling data using generated the G-matrix of one control signaling is subcode coded; the first 3*M column or the last 3*M column of the G is corresponding column of the M-th G<23>, The other X column is composition of the X column of the G<23>; the first 2 columns or the last 2 columns of the G<23> are corresponding column of 2-order unit matrixes, various elements of the Last column is 1; 0<=X<= 3, M>=1. Using the subcode encoder and the subcode coding method of the invention, can ensure that the smallest hamming distance of output code inter-word is the largest, and different generator polynomials corresponded with different values of output code words requirement can be obtained by a simple repeat of unified generator polynomial G<23>, thus having the advantage of achieving simply.

The invention provides a weighted graph modeling method for channel reuse in a wireless cellular network. The method comprises the following steps: abstracting cells in the wireless cellular network as nodes in a weighted graph, and then establishing a weighting margin between each two cell nodes, wherein the weight is equal to an interference value between the two cells. According to the weighted graph modeling method, the cells in the wireless cellular network are abstracted as the nodes in the directional weighted graph, and then a directional margin is established between each two cell nodes, and the weight of the directional margin is equal to the relative interference strength between the two cells; and by adoption of the modeling method, the problems that the interference between the cells cannot be accurately reflected by a conflict graph model and that a hypergraph model can accurately reflect the interference, but the computing cost is high, is overcome, the interference between the cells can be accurately reflected, and the modeling can be accomplished within a polynomial time.

A computing system in which devices communicate wirelessly as secondary users in a band assigned to primary users. The computers communicate using new signals developed to reduce disruption to primary users of the band. The new signals may be produced by sensing, or otherwise determining, signals used by primary users and developing signals using a modulation scheme or other signal parameters that provides little disruption to primary users. These techniques make available to users unused and / or underused portions of the radio spectrum, such as whitespaces between television channels. The new signals may be generated by software defined radios within the computing devices or by switching between modulation schemes supported by conventional wireless network interface card.

In the method for operating an interference multiple access communications system, wherein the improvement comprises the steps of employing a distributed scheduler within a Media Access Controller (MAC) for Multiuser Detection (MUD) enabled Mobile Ad-hoc Networks (MANETS) to increase spectral efficiency by increasing spectral use and providing a way to dynamically allocate virtual channels to achieve maximum channel reuse in different network topologies and different link patterns and to ameliorate any hidden or exposed node problems.

Multi-carrier point-to-multi-point CDMA system implementation reduces hardware changes in legacy single-carrier systems. The number of common downlink channels, such as timing / synchronization and paging channels, is reduced by designating an anchor carrier for transmitting these channels. Procedures for adding carriers and carrier acquisition are simplified through common carrier timing, signaling by the network to the user equipment (UE) of timing offsets and scrambling code selection, and other measures. Channel reuse is employed to minimize changes in asymmetric systems with different numbers of uplink and downlink carriers. Channel Quality Indicator (CQI) field is divided into multiple subfields to enable transmission of multiple CQIs and ACK / NACK indicators on one uplink carrier.; Joint and separate scheduling schemes are shown for concurrent scheduling of a data stream transmission to a UE via multiple downlink carriers.