596results about How to "Reduce switching delay" patented technology

A novel method and system for enhancing user experience when switching channel in digital video broadcasting system is proposed. The invention proposes a server-based cache mechanism which caches all channels simultaneously in a cache server near from the video playing terminal. The channel switch latency could be heavily reduced since the initial part of the current GOP of any channel could be retrieved from the cache server, therefore the user experience is improved greatly.

A configurable directional 2D router for Networks on Chips (NOCs) is disclosed. The router, which may be bufferless, is designed for implementation in programmable logic in FPGAs, and achieves theoretical lower bounds on FPGA resource consumption for various applications. The router employs an FPGA router switch design that consumes only one 6-LUT or 8-input ALM logic cell per router per bit of router link width. A NOC comprising a plurality of routers may be configured as a directional 2D torus, or in diverse ways, network sizes and topologies, data widths, routing functions, performance-energy tradeoffs, and other options. System on chip designs may employ a plurality of NOCs with different configuration parameters to customize the system to the application or workload characteristics. A great diversity of NOC client cores, for communication amongst various external interfaces and devices, and on-chip interfaces and resources, may be coupled to a router in order to efficiently communicate with other NOC client cores. The router and NOC enable feasible FPGA implementation of large integrated systems on chips, interconnecting hundreds of client cores over high bandwidth links, including compute and accelerator cores, industry standard IP cores, DRAM / HBM / HMC channels, PCI Express channels, and 10G / 25G / 40G / 100G / 400G networks.

Systems and methods for improving or suggesting alternatives to content surfing are provided. When it is detected that a user wishes to surf, a pipeline tuning sequence is implemented where by storing one or more frames of a first content selection to the user equipment and acquiring a subsequent content selection while concurrently displaying the previously stored one or more frames. Content suggestions, program listing grids, media guidance application and tuning hints, advertisements, digital audio, and live video may also be presented to user while content surfing. In some embodiments, content surf landing channels may be anticipated based on user history, user profiles, or any other suitable information. In some embodiments, thumbnails of the user's recently tuned, or paused on, content are displayed to the user while content surfing. In multiple tuner systems, more than one thumbnail may be displayed in full motion video.

When switching sources, resolutions or refresh rates in a video distribution network, switching times are reduced by maintaining video lock and security authentication between a video switcher and a video sink. The scaler maintains video lock and security authentication by continuing to generate video timing data during switching events. The scaler also facilitates an aesthetically pleasing transition by generating image content data prior to and after the switching event.

Sensors mounted on vehicles (e.g., buses, taxis, police cars) and public personnel (e.g., policemen) are used to monitor various conditions and situations such as air quality, potential biological and chemical attacks, and road and traffic conditions. The invention improves upon the typical approach that deploys fixed sensors at every geographical position of interest. The total number of required sensors and the size and the complexity of the network infrastructure required to connect the sensors are reduced and simplified. A method for estimating the number of mobile sensors required to cover a region of interest also is disclosed. A relatively small number of mobile sensors may be sufficient to cover a large area at a lower cost and less complexity than a fixed sensor network.

A method for reducing the number of channels that are scanned during a handoff situation for a wireless endpoint station in a wireless local area network (WLAN), such as an IEEE 802.11 network, by tracking past user movements within the WLAN. A suitable sequence of channels to be scanned is generated so that reduce the number of handoffs are reduced and the average time during a handoff is reduced. To reduce handoffs and handoff latencies, the principle of locality (user movement patterns tend to be repetitive) is used. By tracking the past handoffs, future handoffs are predicted.

An IPSec tunnel is established by assigning parameters TS and SPI being translated into TFT (PF I, PF II). A first index is assigned. A GTP tunnel is established based on TFT (PF I, PF II) and the first index. GGSN generates a table based on TFT (PF I, PF II) and the first index, for UE in WLAN network to access 3G services. UE assigns a second index when roaming into the 3G network. A tunnel between SGSN and UE is established based on TFT (PF I, PF II) and the second index. Another tunnel between the SGSN and the GGSN is established based on TFT (PF I, PF II) and the second index. GGSN searches for the table with the first index based on SPI in the TFT (PF II), for reusing the table for not interrupting 3G services provided to the UE in the 3G network.

The present invention discloses a network assisting and UE (user equipment) control type fast cell handover method and device and is used for performing fast cell handover. The fast cell handover method comprises: obtaining one or a plurality of candidate cells by a source base station according to a configured adjacent cell list; interacting the source base station and a base station to which each candidate cell belongs for preparing resources for UE handover; organizing network assisting information by the source base station, and then re-configuring messages to the UE by radio resource control (RRC) connection; and measuring by the UE according to a configured handover manner, optimizing one of the configured candidate cells to be used as a handover target cell during handover judgment, and then synchronizing the selected target cell. According to the method and the device, through the adoption of a network assisting and UE control type handover manner, a handover process is optimized, the handover time delay is reduced, a risk of call drop of the UE during cell handover is reduced, the handover success rate is increased, the continuity of services is ensured, and the use experience is improved. The method and the device are particularly suitable for high-mobility scenes, such as high-speed rails or air line covering places, etc.

An apparatus and method for handover of a Mobile Station (MS) in a wireless communication system are provided. The method includes, if a ranging request signal is received from the MS attempting access through a handover, determining if the BS and a serving BS of the MS are the same BS based on the ranging request signal, and, if the BS and the serving BS are the same BS, determining the effectiveness of a Cipher-based Message Authentication Code (CMAC) included in the ranging request signal using previous authentication information of the MS. The serving BS denotes a BS from which the MS has been serviced before the handover. The previous authentication information of the MS denotes authentication information that the serving BS has used for authenticating the MS.

The embodiments of the present invention relate to apparatuses and methods for resource management in a multi-carrier system wherein a plurality of component carriers (CCs) is defined per cell. According to a method in an apparatus corresponding to a radio base station, a message is assembled comprising information on the structure of the cell served by the radio base station; the information including one or more CCs used in the cell that is / are available for a user equipment for performing initial access in the cell. The method also comprises, transmitting the assembled message to the user equipment and indicating to the user equipment to what resources to use for random access in the cell. The exemplary embodiments of the present invention also relates to a method in the user equipment, to a radio base station and to a user equipment.

Systems and methods for improving or suggesting alternatives to content surfing are provided. When it is detected that a user wishes to surf, a pipeline tuning sequence is implemented where by storing one or more frames of a first content selection to the user equipment and acquiring a subsequent content selection while concurrently displaying the previously stored one or more frames. Content suggestions, program listing grids, media guidance application and tuning hints, advertisements, digital audio, and live video may also be presented to user while content surfing. In some embodiments, content surf landing channels may be anticipated based on user history, user profiles, or any other suitable information. In some embodiments, thumbnails of the user's recently tuned, or paused on, content are displayed to the user while content surfing. In multiple tuner systems, more than one thumbnail may be displayed in full motion video.

An apparatus, system, and method are directed to managing connectivity in a network by expediting the ability of a mobile node to send Internet Protocol (IP) packets subsequent to a handover. The mobile node is configured to determine an unconfirmed address for use on an access router. Upon establishing a link-layer connection, and before establishing a network-layer connection with the access router, the mobile node employs the unconfirmed address to send an IP packet to the access router. Employing the unconfirmed address prior to network-layer connectivity enables the reduction of handover latencies. If the access router determines that the unconfirmed address conflicts with an existing address, the access router provides a message to the mobile node indicating the conflict in addresses. In response to the message, the mobile node performs actions to resolve the address conflict.

The invention discloses a rapid access point switching method based on a dynamic access path selection mechanism, wherein, in a multi-hop relay broadband radio access network, each district exists a plurality of access points, including a base station and a delay station, a mobile user dynamically and rapidly switches to the access point of an adjacent district in a moving process according to the quality of a current radio channel with the aid of access path selection algorithm. By means of access point reselection, information such as the bandwidth, delay and hop count of a candidate access point path, and the current connection business type of the mobile user and service quality parameter thereof, the method of the invention selects the access path that satisfies current traffic condition from the candidate access points, and according to a best anchoring access point selected from business information obtained beforehand from a reserved network, the best access path is determined. When the mobile user needs switching, a target access point is switched rapidly, and the rapid access point switching method reduces switching delay, and different treatment on business with different priority improves switching connection rate.

A first aspect of the invention relates to a method for improving security at a local mobility anchor implementing both a network-based and a host-based mobility management scheme for managing the mobility of a mobile node. It suggests a method for verifying an attachment of a mobile node (MN) to a network element in a network. A second aspect of the invention relates to a method to be implemented in a mobility anchor node, which detects whether a race condition between registration messages occurs and resolves the most recent location of a mobile node. A third aspect of the invention relates to a method for detecting whether a binding cache entry for a mobile at a correspondent node has been spoofed and to a method for registering a care-of address of a mobile node at a correspondent node.

The invention discloses a fast switching method based on movement detection in a wireless network, comprising the following steps: movement detection: firstly, a distance between a AP and a movable node is estimated by collecting a RSSI value in a movable node data packet, secondly, the position information of the movable node is obtained by using node location so as to predict the move direction and the mode speed of the movable node with the position information; AP selection: proper neighbor AP is selected according to the move direction and the move speed of the movable node so as to be provided to the movable node for switching; and fast switching: the fast switching of the movable node is realized by amending traditional 802.11 protocol. The invention uses the movement detection method to predict the nest switched AP of the movable node by amending the traditional 802.11 protocol, when the movable node needs to be switched, only need to scan a signal path in which the preliminarily selected AP is located, therefore, switching time delay is reduced and the fast switching is realized.

A handover method of a mobile terminal between heterogeneous networks for facilitating the handover with pre-authentication procedure is provided. A handover method between heterogeneous networks includes receiving, at a mobile terminal connected to a source network, information on at least one target authenticator of a target network from a source authenticator in response to an attach request; creating an authentication key between the mobile terminal and the target authenticator selected among the at least one target authenticator through a pre-authentication process; determining, when the mobile terminal transmits a handover request to the selected target authenticator, whether the authentication key contained in the handover request matches with the authentication key stored in the selected target authenticator; and connecting, when the authentication keys match with each other, to the target network via the selected target authenticator.

The invention provides a SDN (Software Defined Network)-based heterogeneous network convergence framework. According to the framework, the core idea of control and data separation in the software defined network is referred, a controller is added in an EPC core network, user identity information is packaged to be a unique user identifier to serve as the identity certificate during the network access and switching process. The concept of the user identifier is used, a method of realizing virtual switching under the control of the controller is brought forward, the switching access process can be theoretically simplified, and network access time delay can then be reduced. After switching, the IP remains unchanged, the time spent on IP layer switching in the case of heterogeneous network switching is saved, the target of reducing the entire switching time delay is achieved, IP address management and user safety management in a mobile environment are facilitated as the IP is maintained, and a feasible solution is provided for solving the problem of seamless switching between the LTE network and the WLAN network.

A multi-attribute handover judging method for a heterogeneous vehicle communication network comprises the following steps: a handover management entity reads information on a candidate network in a field network report buffer entity, and the diameter of the coverage region of the candidate network is calculated; a mobility prediction information management entity acquires position information and speed information of a mobile user, and sends the position information and the speed information to the handover management entity; possible residence time and throughput capacity in each neighbor access network of the mobile user is estimated, when the throughput capacity during handover is higher than the throughput capacity in a normal state, the candidate network is added in an alternative list; an optimal target access network is determined to be switched into the network by the handover management entity via an analytic hierarchy process and according to service quality requirements; when the intensity of the current switch-in network signal is lowered to a threshold value, a handover execution instruction is sent to carry out handover. The multi-attribute handover judging method provided by the invention avoids unnecessary handover when a traveling vehicle passes through a region covered by heterogeneous access network, reduces handover delay and ensures the continuity of the communication.

The embodiment of the invention discloses a method for reducing handover delay in LTE systems. The method comprises that: source eNB sends a handover request to alternative target eNB of all alternative target cells of which the management meets handover judgment conditions, agrees to allow the alternative target eNB to which the alternative target cells with the handover request to reserve resources for current handover, and stores context of user equipment UE performing the current handover; and the alternative target eNB informs the source eNB of the information of the alternative target cells agreeing to the handover request. The method can trigger all alternative target eNB to be reserved resources for the current handover so as to reduce the handover delay caused by a currently selected target eNB not agreeing to hand over. In addition, in the process of handover execution, the source eNB simultaneously forwards data to all the alternative target eNB returning response to the handover request, so data loss caused by handover failure can be avoided.

The invention discloses an information center network mobility management method based on content popularity and belongs to the technical field of next-generation internet technology research. The method includes the steps that, a requester side moves, specifically, the content requester sends an Interest package request, a router in a network receives the Interest message, the local cache is searched first, the Interest message is directly returned to the requester if the content exists in the local cache, and otherwise a PIT table is searched; a proxy node compares the popularity of the content with a popularity threshold value K; a content source moves to a new position and sends a 'handoff completion' message to the proxy node, wherein it is indicated that handoff is completed if an M marking position is '2', and a K marking position is 'NULL'. According to the method, the mobility of mobile nodes in the content center network is achieved, and the mobility management method based on the proxy node and the web cache avoids communication outage caused by single-fault nodes and link failure; once the proxy node fails and can not serve any more, the network can automatically carry out handoff in a web cache mode, and therefore it is guaranteed that communications are conducted normally.

A switching method between LTE and Pre-LTE in mobile communication system, during switching between LTE and Pre-LTE, the LTE system is regarded as a Pre-LTE system, the course of switching makes SGSN regards switching as a SRNS relocation course. When the LTE is switched to Pre-LTE, the function of SGSN is similar with new-SGSN of SGSN in course of relocation; MME possesses function of old-SGSN; when the Pre-LTE is switched to LTE, the function of SGSN is similar with old-SGSN of SGSN in course of relocation, the MME possesses function of new-SGSN. The MME can transform new and old system command and information; it possesses function of command gateway. The switching method between LTE and Pre-LTE in the invention does not need to update current system, delay of switching is little, and data loss can be decreased to the minimum.

A method of displaying multi-channel waveforms, which is used for displaying multi-channel waveforms dynamically in embedded systems, the method comprising the steps of: dividing at least one waveform screen in a video memory which is mapped to a display terminal into a plurality of waveform windows, wherein boundaries of each of the windows are defined by a plurality of values set in at least a set of boundary registers; establishing a waveform parameter table in a memory of the system, which contains characteristic parameters of each waveform in each of the waveform windows; writing waveform data into a logical space in the waveform screen corresponding to a waveform by writing operations from CPU to the video memory; and on a basis of the parameters of the waveform windows in the waveform parameter table, performing a display mode defined by the parameter by means of is changing the mapping relationship between the video memory and the display terminal, before transmitting the data of each of the waveform windows read out from the video memory to the display terminal by a display drive circuit. According to the method of present invention, the inconsistency between the increase of waveforms and the resultant significant increase of logic resources and degradation of the performance of chips for display can be solved, which enables the system advantageous in high efficiency, low cost and excellent extensibility.

The invention provides a switching method used for a group monitoring user and a terminal thereof. The method comprises the following steps that the group monitoring user in an idle state acquires measurement control information and wireless resource configuration information from a system broadcast message; the group monitoring user in the idle state carries out measurement according to the acquired measurement control information and initiates radio resource control (RRC) connection establishment process when a measurement report needs to be reported; according to the acquired wireless resource configuration information, the group monitoring user in the idle state establishes RRC connection with a base station and the idle state is converted into a connected state; the group monitoring user in the connected state uses a switching process of the connected state to switch to a target cell when the switching is needed. By using the method and the terminal of the invention, the group user can be supported to carry out the effective and fast switching.

The present invention provides a fast handoff method in a wireless Local Area Network, the method is that a line mobile node STA selects an Access Point aggregation of the Wireless Local Area Network swept the frequency; the STA performs the interaction of the unicast type detecting and authenticating information to the AP aggregation, completes an active frequency sweep process, and selects a goal AP; the STA and the goal AP are associated newly. The present invention also provides a fast handoff method by adopting the unicast type active sweep-frequency and augmenting the safety during the two stages of the re-authentication. A technical proposal provided by the present invention merges the two stages of the sweep-frequency and the re-authentication into one sweep-frequency authentication stage, and the unicast type active sweep-frequency method is also adopted, to effectively decrease the waiting time consumed in a channel and reduce the handover time delay; a Message Integrity Identifying Code is joined during the interaction of the sweep-frequency authentication information, to enhance the safety of the switch. The other technical proposal also decreases the waiting time consumed in the channel, decreases the handover time delay, and enhances the safety of the switch.

A method and apparatus of multicast traffic redundancy protection is provided. After a fault occurs, the VRRP selects a new active router and notifies the PIM routing protocol, and the PIM uses the new active router as its DR.

The invention belongs to the technical field of mobile communication, in particular disclosing a high-speed railway mobile network covering method based on a distributed antenna and a fixed switching channel. BBU+RRU radio frequency remote technology is adopted to conduct high-speed railway linear covering; N numbered channels are divided into a logic channel; N numbered RRUs cover a logic channel; a BBU corresponds to a logic channel; the adjacent part of two logic channels is independently provided with an RRU which is not only connected with the BBU corresponding to the previous logic channel, but also connected with the BBU corresponding to the next logic channel; the covered range of the independent RRU is defined to be the fixed switch channel, and fixed direction switching is completed by utilizing the fixed switching channel and the train operating direction at the edge of the channel. The switching process is simple in operation and has accurate, thus greatly lowering the probability of drop-call during switchover at the edge of the channel and avoiding ping-pong switchover of the channel.

The invention discloses mobile terminal equipment and a dispatching method and device thereof. The multi-card dispatching method comprises the following steps of: setting one card as a main card and other cards as secondary cards, wherein the level of a network resident by the main card is higher than or equal to that of a network resident by the secondary cards; after starting the equipment, completing network residences of the plurality of cards, controlling the main card to perform normal standby operation and controlling the secondary cards to perform interval standby operation at the idle time of the main card; when one card calls or is called by a service request, processing the service request of the card and hanging on other cards; and, after processing the service request, completing the network residences of the plurality of cards, controlling the main card to perform the normal standby operation and controlling the auxiliary cards to perform the interval standby operation at the idle time of the main card. According to the technical scheme, the power consumption and the risk in losing called paging can be reduced.

The invention discloses a method for realizing television channel switch, including: determining a channel where the current broadcast channel data source locates and a channel where the preset appointed channel data source locates, wherein, the appointed channel has one or a plurality of channels; performing receiving, channel decoding and caching to the data of the channel where the current broadcast channel data source locates and the data of the channel where the preset appointed channel data source locates, and performing data demultiplexing, audio and video decoding and broadcasting to the data cached in the channel where the current broadcast channel data source locates; when the broadcast channel is switched to any one appointed channel, directly processing and broadcasting the data cached in the channel where the appointed channel data source locates. The present invention also discloses a multimedia broadcast receiving terminal. Application of the present invention can greatly reduce the switching delay.

The invention discloses a method for inter-cutting video monitor in IPTV. The IPTV system comprises a stream media service platform, a stream media sever and a video monitoring front end. The method comprises the steps that firstly, the video monitoring front end triggers the video monitoring to report an alarm and sends video monitoring alarm information to the stream media service platform; secondly, the video monitoring alarm information is sent to the stream media sever by the stream media service platform; thirdly, the video monitoring alarm information is transferred to a user terminal by the stream media sever through the media controlling channel of the IPTV, and the relay of the video monitoring code stream to the video monitoring front end is set up; fourthly, after a switching command from the user terminal is received, the video monitoring code stream is sent to the user terminal by the stream media sever through the media controlling channel of the IPTV. The invention also provides a system for inter-cutting video monitor in IPTV accordingly. Therefore, by adopting the method and the system, the real time quick switching between the IPTV service and the video monitoring service can be realized.