134 results about "Cross-layer optimization" patented technology

Multimedia communications with cross-layer optimization in multimedia communications with different user terminals. Various optimization for the delivery of multimedia content across different channels are provided concurrently to a plurality of user terminals.

A reconfigurable multi-media system, method and device provides monitoring and reconfiguration of a plurality of communication layers of a communications stack to dynamically reconfigure the modulation and coding of software defined radio (SDR). The system includes a software object radio (SWR) library having reconfigurable object specification, design and performance parameters, the SWR is adapted for at least one of transmitting and receiving multi-media content via wireless communication; a controller in communication with the SWR library; a power management device module in communication with said controller; a reconfigurable encoder / decoder in communication with said controller to provide the SWR with dynamic coding information for modulation; a TCP / IP interface in communication with said reconfigurable encoder / decoder and said controller; and an application layer comprising a link layer and a reconfigurable physical layer in communication with each other and said controller, the physical layer adapted for communication with a channel, and the application layer including at least one driver for multi-media delivery. The controller monitors the physical layer and link layer information and the reconfigurable encoder / decoder dynamically reconfigures modulation and coding of multi-media content according to a cross-layer optimization approach.

A network system providing highly reliable transmission quality for delay-sensitive applications with online learning and cross-layer optimization is disclosed. Each protocol layer is deployed to select its own optimization strategies, and cooperates with other layers to maximize the overall utility. This framework adheres to defined layered network architecture, allows layers to determine their own protocol parameters, and exchange only limited information with other layers. The network system considers heterogeneous and dynamically changing characteristics of delay-sensitive applications and the underlying time-varying network conditions, to perform cross-layer optimization. Data units (DUs), both independently decodable DUs and interdependent DUs, are considered. The optimization considers how the cross-layer strategies selected for one DU will impact its neighboring DUs and the DUs that depend on it. While attributes of future DU and network conditions may be unknown in real-time applications, the impact of current cross-layer actions on future DUs can be characterized by a state-value function in the Markov decision process (MDP) framework. Based on the dynamic programming solution to the MDP, the network system utilizes a low-complexity cross-layer optimization algorithm using online learning for each DU transmission.

Methods and systems for adaptive cross-layer cross-node optimization in wireless communication systems are provided. Adaptive cross-layer cross-node optimization allows for conventional cross-layer optimization coupled with the ability to adaptively optimize cross-layer interactions across node boundaries. In one aspect, adaptive cross-layer cross-node optimization includes adaptively and dynamically shifting functions / layers among nodes in a network, so that a global network objective is achieved. In another aspect, adaptive cross-layer cross-node optimization includes adaptively and dynamically distributing functions / layers across a network, according to changes and / or events in the network. In a further aspect, adaptive cross-layer cross-node optimization includes dynamically defining or changing individual node functions within a network, so that a global network functionality may emerge.

Multimedia communications with cross-layer optimization in multimedia communications with different user terminals. Various optimization for the delivery of multimedia content across different channels are provided concurrently to a plurality of user terminals.

The invention provides a base station, a service processing method and a cloud computing system. The base station comprises the steps of building a wireless network bearing channel between the base station and user experience (UE), receiving service requests of the UE through the wireless network bearing channel, analyzing request contents in the service requests of the UE, generating cloud service access requests through the contents needed to be processed by a cloud server terminal according to the request contents, sending the cloud service access requests to the cloud server terminal, and returning corresponding processing results of the cloud server terminal to the UE through the wireless network bearing channel. Therefore, transport layer protocols and access layer protocols of a user device side are ended at the base station, and cross layer optimization is achieved through the base station, the service processing method and the cloud computing system.

A method and apparatus is disclosed whereby the scheduling of network transmissions in a wireless backhaul network is determined using a cross-layer optimization algorithm. In a first embodiment, the algorithm assumes a good MAC layer transmit schedule has been provided and computes optimal network layer routes as well as transmit beam patterns and transmit powers in a semi-distributed manner. According to this embodiment, the optimization goal is the throughput from each access point, or node in the network, to the core network. In another embodiment, an independent set of transmitting nodes is determined at the MAC layer in a way such that no link in the set interferes with another link and no link is scheduled to transmit and receive at the same time. According to this embodiment, a column generation algorithm is used to find a maximal weighted independent set and to achieve optimal network transmission throughput.

The invention relates to a cross-layer design method for downlink resources in D2D (device-to-device) technology sharing system, in particular to a method and an algorithm for allocation and scheduling cross-layer resources in downlink resources of a cellular subscriber multiplexing cellular system with D2D terminals in an IMT-Advanced (international mobile telecommunications-advanced) system. A considered system model comprises an intra-cell application scenario and an inter-cell application scenario. D2D subscribers existing in a wireless cellular network system in the form of self-organization and cellular network subscribers co-exist in the form of underlay and share the same downlink radio resources (including channels, timeslot, power and space). Allocation and scheduling on the resources are discussed to solve the problems of interference coordination and suppression. The intra-cell application scenario and the inter-cell application scenario are considered respectively, common features of the different application scenarios are found, and personality factors of the different application scenarios are also considered. For characteristics of a D2D and cellular network system, the defects in existing resource allocation schemes are overcome and the resource-based cross-layer optimization, allocation and scheduling method is provided.

The invention relates to a cross-layer-resource-optimization-based space-sky information network information transmission method and a cross-layer-resource-optimization-based space-sky information network information transmission system. a route meeting service needs is calculated according to the states of a network and a node of a bottom layer for different service needs of an application layer by utilizing a cross-layer designing concept, the wasting of network resources is reduced in ways of realizing the balanced allocation of network bandwidth resources, avoiding congestion and reducing network control information, and the optimized utilization of the network resources is realized at the same time of ensuring the accurate transmission of data.

A method and apparatus for transmitting a multimedia data packet are provided. The method includes receiving Bottom-up Network Abstraction Layer (B-NAL) information from a network entity, generating Top-down Network Abstraction Layer (T-NAL) information on the multimedia data to be transmitted, generating a multimedia data packet containing said T-NAL information, and transmitting the multimedia data packet generated in the previous process, to the network entity, in consideration of said B-NAL information.

A cross-layer optimization is presented between the MAC and Network layers to enhance the performance of VoIP services in advanced wireless networks. Among the factors considered in the optimization are the characteristics of the originating source and the network path. This information is relayed using the Network layer to provide feedback to the MAC layer in order to improve the end-to-end performance of VoIP services.

Systems and methodologies are described that facilitate efficiently communicating a data packet related to a protocol layer within a wireless communication system. The systems and / or methods can provide cross-layer optimization by directly transporting or communicating data to a particular protocol layer. In general, a MAC header can include data that indicates a protocol layer to which such data is directed or targeted. The MAC header can allow a portion of data (e.g., PDUs, SDUs, etc.) to bypass at least one protocol layer above the MAC protocol layer for efficient and optimized processing of such data.

The invention relates to a data concurrence transmission method based on cross-layer optimization in a wireless heterogeneous network system. The data concurrence transmission method based on cross-layer optimization in the wireless heterogeneous network system comprises the following steps: a gateway is defined as an assembling point of a plurality of wireless heterogeneous networks which are assembled between a server and a terminal; a new protocol layer, namely a cross-layer processing layer, is built between a network layer and a data link layer of the gateway, and meanwhile, a visual interface card is built on the cross-layer processing layer; when data transmitted from the server arrives at the gateway, an internet protocol (IP) data package is abstracted from the network layer of the gateway, and meanwhile, information channel quality information of each wireless heterogeneous network is detected by the gateway; and the IP data package to be sent is allocated to the each wireless heterogeneous network by the cross-layer processing layer according to detection results and is sent to terminal equipment; the terminal receives the data, puts the received IP data package into a receiving buffering area, and conducts reordering and processing routines on the IP data package in the buffering area. The data concurrence transmission method based on cross-layer optimization in the wireless heterogeneous network system can increase end-to-end transmission speed of the network, reduce service end-to-end transmission delay, and achieve equalization transmission of concurrence data in the wireless heterogeneous network system.

The invention provides a single antenna multichannel cognitive wireless sensor network route control method which is cross-layer optimized and aims at a cognitive wireless sensor network with single collecting nodes, single antenna and multichannel. According to the single antenna multichannel cognitive wireless sensor network route control method, route characteristic number concepts are defined, a multichannel half-holding phone mechanism is designed; a plurality of local routes are generated by utilizing channel priority of data transmission full paths and weighting and minimum of consumption of node collecting and sending as optimization indicators, the routes are saved in a route table of each node according to a combination manner of a channel or a node, the whole network route optimization is achieved by distributed routing algorithm, protocol pay expenses are reduced, network robustness is improved, and utilizing of opportunistic spectrum resources is convenient. Channel switching in data transmission is reduced due to application of the multichannel half-holding phone mechanism. According to testing results, quality of service (QoS) is supported by a routing protocol of the single antenna multichannel cognitive wireless sensor network route control method under the condition that the opportunistic spectrum resources and limiting of node consumption are utilized. Under the condition that node consumption is limited, communication delay and packet loss rate are reduced.

A multi-radio frequency multi-channel wireless Mesh network resource cross-layer optimizing method aims to solve the problem of wireless resource cross-layer optimizing of a wireless Mesh network. For the multi-channel multi-radio frequency wireless Mesh network, cross-layer optimizing among channel distributing, route distributing and speed distributing is considered, the complex communication problem is converted into a convex optimization problem, the original optimizing problem is divided into three sub problems by utilizing a Lagrangian dual method, and the simplified problems are solved in the wireless Mesh network in a distributed mode, thus obtaining the global optimal solution. A typical WMN (wireless mesh network) route protocol is compared, analyzed and summed up, and by combining with the cross-layer optimization theory, a route protocol based on comprehensive criteria and suitable for integrated environment of internet of things is provided.

A method for improving wireless self-organized network performance is provided by utilizing the VDSR++ cross-layer optimized technology, relating to the wireless communication technology. The method combines with a cross layer optimized protocol VDSR++ optimization strategy of a MAC layer, a network layer and a transmission layer, exerts a cross-layer mechanism DSR++ on a 802.11MAC layer and an IP layer, solves the problem of route discovery and rebuilding caused by network congestion in the wireless self-organized network; the transmission layer adopts a TCP Veno protocol to solve the problem of route discovery and rebuilding caused by high error rate in the wireless self-organized network. The utility model can improve the TCP performance in the wireless self-organized network. The method is applicable to a static wireless self-organized network SANET and a dynamic wireless self-organized network MANET.

The invention discloses a method for scheduling a service queue, which comprises the following steps of: establishing a plurality of service queues on a network element; using the network element to measure a service quality (Qos) parameter of a service flow on each Real-time Transport Protocol (RTP) passage in a transmission layer; using the network element to distribute the service flow on each RTP passage to corresponding service queue in a network layer; adjusting a band width of each service flow and a weight value of the service queue according to the Qos parameter of each service flow and sending the service flow in each service queue to a lower layer according to weighted cyclic scheduling. Meanwhile, the invention also discloses a device for scheduling the service queue. According to the scheme of the invention, cross-layer optimized scheduling of the service queue can be realized, and the band width of the service flow and the weight of the service queue can be adjusted in real time.

The invention discloses a cross-layer optimization design method in a single-source and single-terminal straight-through relay communication system. The method comprises the two steps of resource distribution and data transmission; the single-source and single-terminal mode means that data are transmitted from one sending source straight-through user to one receiving terminal user. The resource distribution process is the process of applying frequency resources for a base station before the straight-through user builds a communication link; the base station needs to judge how to distribute ideal frequency resources to the straight-through user according to the geographic positions of the applicant, the transmission environment, data types of services and the like; the normal operation of a cellular system is not affected while the effectiveness and reliability of the communication of the straight-through link are ensured. The data transmission process is the process that how to use the resources to achieve efficient communication after the straight-through user obtains the frequency resources. According to the method, link communication is carried out in the mode of combination of adaptive coding modulation and automatic hybrid retransmission.

The invention discloses cross-layer optimal video transmission method and system under an MIMO-OFDM (Multi-Input Multi-Output-Orthogonal Frequency Division Multiplexing) system. The method adopts a strategy of predicting a terminal QoE as an optimization target. The method comprises the following steps: 101) structuring a user experience quality prediction model of obtaining a user expect mean opinion value according to the video content type, frame rate, video transmission bit rate and packet loss probability; 102) obtaining each concrete parameter value in the user experience quality prediction model and obtaining the maximal value of a video packet transmission delay; 103) obtaining a parameter value corresponding to the maximal value of the user expect mean opinion score under the maximal transmission delay condition as an optimal parameter value by adopting a traversal algorithm, wherein the optimal parameter value comprises a video encoding parameter value and a modulation encoding mode parameter value, and finally, respectively encoding and transmitting the video correspondingly to the video encoding parameter of an application layer and the modulation encoding mode of a physical layer.

The invention discloses a high-speed burst demodulation synchronizing device, and relates to symbol timing synchronization in burst communication in the communication field. The device comprises an analog-to-digital converter, a down-conversion unit, a first match filter, a second match filter, a timing recovery unit and a decoding unit, as well as a frame header positioning unit. The device realizes carrier synchronization and timing synchronization on the basis of a preferential sequence of a specific pattern rather than a feedback loop, and realizes timing synchronization of symbols by adopting a method of combining symbol sequence energy matching and threshold adaptability. The device has the characteristics of short synchronization time, high efficiency and wide application range, and carries out windowing at the moment of grouping a synchronization sequence by combing the cross-layer optimization design and with the auxiliary complexing.

The invention discloses a global load balancing satellite-ground cooperative network networking device and a method. The device comprises a multi-domain controller and a single-domain controller. Thesingle domain controller includes a satellite network controller and a ground network controller. The satellite network controller is used for managing and controlling a satellite access network, processing the service within the satellite network domain and reporting the cross-domain service; a terrestrial network controller is used for managing and controlling a plurality of terrestrial core network elements, processing services within the terrestrial domain and reporting cross-domain services. The multi-domain controller is used for controlling a plurality of single domain controllers, receiving the reported cross-domain traffic, and processing the cross-domain traffic through the global load balancing strategy. The method comprises the steps of processing intra-domain traffic by a single domain controller, processing cross-domain traffic by a multi-domain controller, and the like. The invention effectively utilizes various heterogeneous resources of the ground network, the satellite network and the server node, realizes the cross-layer optimization of the heterogeneous resources, reduces the total blocking rate, and improves the service response efficiency in the satellite-ground cooperative network.

The hybrid business resource allocation method in FDM system comprises: presenting a service quality satisfaction level criterion based on optimal physical and data linkage layers; with this criterion, according to active user number, server quality request and received service utility function value in every time slot, deciding user PRI, and allocating adaptively sub-carrier to user with high PRI. This invention can meet user service request and ensures fairness.

The system comprising an application CSO gateway coupled to an application layer that configures and monitors a plurality of Data Center Elements storing computing resources; a network CSO gateway coupled to a network layer that configures and monitors a plurality of Network Elements and to receive requests from said ACG to configure connections, wherein the system further includes a Client entity coupled in an already deployed Network Element or in a Data Center Element configured to monitor a segment of the network where said Client entity is found; an IT-Aware Network Controller coupled to said network layer configured to run operations in and from the network regarding information of said monitored network information and of said Data Center Elements; and interfaces coupling the different elements of the system allowing the interconnection and communication between them.The method of the invention is intended to be implemented by the system of the invention.

A power carrier communication method includes the following steps: an information acquisition step, a synchronization status message step, an information processing step and a communication step, wherein in the information acquisition step, a physical layer receives a pilot frequency signal to obtain channel status messages; in the synchronization status message step, the physical layer and a data transmission control layer synchronize the channel status messages; in the information processing step, a required data packet capable of communicating is obtained according to the channel status messages; and in the communication step, a time period is occupied in turn to transmit the required data packet capable of communicating. The method and the device realize the layer optimization of power carrier communication, effectively promote the mutual cognition, mutual coordination and interaction between the physical layer and a data transmission control layer, achieve the high efficiency and the reliability of data transmission, and are beneficial to transmitting high-speed data, voice, images and other multimedia business signals in a power grid.

The invention discloses a multimedia communication cross-layer optimization method having different user terminal and a device. A method used in the bidirectional transferring content and routed to the different devices includes: receiving the first multimedia content from a first device beside the home position and a second device at the home position as the destination; converting the content of the first multimedia to be played by the second device and the content of the converted first multimedia routed to the second device; receiving the second multimedia content from the third device at the home position and the fourth device at the position beside the home position as the destination; and converting the second multimedia content to be played by the fourth device, and the converted second multimedia content is routed to the fourth device. All kinds of optimization transmitted by the multimedia content on the different channel are provided to a plurality of user terminal.

An improved method is provided for reducing packet loss using cross layer information. An exemplary method includes: monitoring a transmission state of a data source, where the transmission state is defined in accordance with TCP; marking data packets with a drop preference at an Internet Protocol (IP) layer of the data packets based on the transmission state; and transmitting the marked data packets from the data source.

Multimedia communications with cross-layer optimization in multimedia communications with different user terminals. Various optimization for the delivery of multimedia content across different channels are provided concurrently to a plurality of user terminals.

The invention relates to a cross-layer optimization design method based on incomplete channel state information (CSI) and antenna transmit power allocation for a wireless space time coding multiple input and multiple output (MIMO) system. According to a power allocation algorithm, optimization aims to maximize the average spectral efficiency (ASE) of the system. In order to reduce complexity in the solution of an optimization problem, the problem is converted into the minimization of average packet error rate (PER) of the system according to a relationship between the ASE of the system and the average PER. In order to avoid the multiple iterative computation of the conventional optimal power allocation algorithm, a power allocation method based on a maximum compression signal to noise ratio is provided, and closed power allocation can be realized. By the method, the iterative computation is not required, and positive power requirements are met; and moreover, due to high proximity, performance approximate to that of the conventional optimization algorithm can be achieved, and effective compromise between the complexity and the performance is realized. A matlab simulation platform shows that the fed back incomplete CSI can be effectively used for rate and power adaptation and automatic repeat request, and the spectral frequency of the system is greatly improved.