57 results about "Wireless network virtualization" patented technology

The invention discloses a flow table spatial isolation device for network virtualization. The flow table spatial isolation device for the network virtualization comprises a network allocator, a network manager and an exchanger, wherein the network allocator is used for sending a user identification command to the network manager, the network manger is used for receiving the user identification command sent by the network allocator and sending the user identification command to the corresponding exchanger according to corresponding relation between user identification and a flow table segmentation strategy, the exchanger is used for receiving the user identification command sent by the network manager and adding the user identification into a matching domain field of a flow table to be served as identification of the flow table; and the user identification is added into an attribute portion of a message which is received and served as identification of the message. The invention further discloses a flow table spatial isolation method for the network virtualization. The flow table spatial isolation device and the method for network virtualization are adopted, so that the command which passes through the network manager can be directly sent to a user controller or the exchanger through the user identification.

An access point of a wireless network including: a controller for emulating a first virtual access point of a first service provider and a second virtual access point of second service provider; a transceiver port for communicating control signals to clients of the first and service providers to limit the uplink air-time of the clients; and a connection port for linking the first and second service providers to a backhaul.

The invention discloses a method for realizing mobile network virtualization, a control platform, a virtualization base station and a system. The method comprises the following steps: the control platform receives the pipeline resource reservation request of an application, carries out an allocation resource reservation deployment for the application, and notifies the virtualization base station and a core network to reserve the corresponding resources and establish pipelines and access equipment and bandwidth resources corresponding to the pipelines; pipeline reservation identifications are allocated to the pipelines of the application, and returned to the application; a data forwarding path is generated on the basis of the established pipelines, and routing information is sent to network routing equipment to execute. The method, the control platform, the virtualization base station and the system disclosed by the invention are capable of furthest utilizing network resources, and realizing efficient dynamic allocation for the network resources.

A method and apparatus is disclosed herein for wireless network virtualization through sequential auctions and conjectural pricing. In one embodiment, the apparatus comprises a plurality of service providers operable to bid on network resources on behalf of a plurality of individual receivers and a wireless network operator, communicably coupled to the plurality of service providers, to perform resource allocation using an auction to allocate network resources to the plurality of service providers based on instantaneous channel conditions and traffic information of each of the individual receivers and to schedule transmissions in time and space to the individual receivers.

The invention discloses a communication method and device for an NVO3 (Network Virtualization Overlays) network and an MPLS (multi-protocol label switching) network and aims to achieve cross-domain communication between the NVO3 network and the MPLS VPN (virtual private network) network. In certain feasible embodiments, the method includes the steps: an ASBR (autonomous system border router) in the NVO3 network acquires an identifier of PE (provider edge) equipment in the MPLS network and an MPLS label which is assigned by the ASBR in the MPLS network and which is used as an outer label for an MPLS packaged message transmitted to the PE equipment by the ASBR in the NVO3 network; in a local address pool, an IP (internet protocol) address is assigned for the MPLS label, and a correspondence between the MPLS label and the assigned IP address is stored; routing information which includes the identifier of the PE equipment and the assigned IP address is sent to an NVE (network virtualization edge), and the assigned IP address is used as an outer target address of a NVO3 packaged message which a TES (tenants terminal system) in the NVO3 network transmits to CE (customer edge) equipment connected with the PE equipment in the MPLS network.

The invention designs a 5G wireless network virtualization system structure based on calculation and communication fusion. The system structure gets through a resource barrier of a heterogeneous wireless network, shares an access network resource, breaks through a traditional honeycomb cell structure, and supports separation of a control plane from a data plane. Communication, calculation and storage multi-dimensional resources are considered to perform joint optimization, a network taking a user as a center is established, and a development need of a 5G system is finally adapted. The system structure is divided into three parts, i.e., a wireless physical network, a wireless virtual network and a core network. The wireless physical network part comprises infrastructure, resource pools and a physical network controller; and network resources are divided and stored according to a wireless resource, a computing resource and a storing resource, are placed into the corresponding resource pools, and are managed and controlled in a unified manner by the physical network controller. The wireless virtual network part comprises a plurality of virtual subnets and a virtual network controller, and the virtual network controller is responsible for coordination with the physical network controller and allocates the virtual subnets according to user needs.

The invention discloses a mapping algorithm adopted in a wireless network virtualization environment. The mapping algorithm aims to solve the problem of existing wireless network virtualization mapping algorithms that public resources including bandwidth and frequency spectrum which can be shared between different basic facilities within a certain range and private resources including power and computing capacity which only belong to fixed hardware equipment and can not be shared are not well defined and distinguished. The mapping algorithm is capable of realizing joint optimization of power resources and frequency spectrum resources, interaction between power resources and frequency spectrum resources is comprehensively considered, the cost function of virtual network mapping is established by defining unit resource cost for reflecting the physical network loading level, mapping cost minimization is taken as the optimization object, physical network load balancing is achieved, path separation is adopted during virtual network mapping, and the utilization efficiency of physical resources is improved and the success rate of virtual network mapping is increased.

The invention provides a resource allocation method for virtualization of a wireless network. The resource allocation method comprises the following steps of utilizing a buy and sell model to solve a game problem between SPs (service provider) and MUEs (multiuser); then, according to the expected power and the self initial allocated power, enabling the SP to propose a self utility function to a NO (network operator); enabling the NO to reallocate the power between the SPs by building an auction model. In the buy and sell model, the Steinberger balance exists; in the auction model, a McPhee mechanism is utilized, the SPs provide the self real utility functions to the NO, and the NO reallocates the resources between the SPs. The method has the advantages that the physical resources are sufficiently utilized, and the resource utilization rate of infrastructures is improved.

The invention discloses a wireless network virtualization mapping method based on the anti-interference performance of links. The method includes the steps: 1) performing screening according to virtual requests to obtain physical network resources; 2) building an interference model according to wireless physical links; 3) generating a virtual node list, a mapping relationship list from empty virtual nodes to physical nodes, an empty distributed virtual node list and an empty used channel list; 4) generating a physical node list and a neighbor node list of the physical nodes; 5) mapping the nodes; 6) screening the links; 7) selecting and mapping the links. As reliability and interference of the links can react to communication of the wireless links, the shortest path is found by a Dijkstra K-shortest path method, all the physical links in the path selected after link mapping are positioned in different channels in the used channel list, and distribution of the nodes and the links is effectively coordinated by a 'coordinated step-by-step' resource distribution method.

The invention discloses a virtual fast switching algorithm for a wireless Mesh network based on a dynamic cluster. The algorithm comprises a Mesh client and a Mesh node. The Mesh client comprises an access module and a data packet module; the access module transmits an access request and updates an MAC address of a default gateway; and the data packet module generates a data packet. The Mesh nodes comprises a dynamic cluster maintenance module, a data multicast group maintenance module, and a data packet routing module; the dynamic cluster maintenance module responds to the access request of the client, constructs a dynamic Mesh access point cluster and exchanges link quality information with the client; the data multicast group maintenance module forwards the data packet for the client; and the data packet routing module establishes a multicast routing. In a movement process of the Mesh client in a wireless Mesh network environment, the Mesh network comprehensively considers the access link quality and the backhaul routing situation by constructing the dynamic cluster, so as to select an optimal access point for the client and realize fast switch of the client. The algorithm can accomplish the fast switch of the mobile Mesh client without modifying a 802.11 device drive.

The invention belongs to the technical field of wireless communication, and discloses a D2D (Device-to-Device) multicast resource allocation method in a wireless network virtualization scene. A virtual network operator implements virtualization of a physical network according to service types of users; according to geographic positions of the users and requested service contents, a cellular user group and a D2D multicast user group are determined; according to a service type required by each group of users, the cellular user group and the D2D multicast user group are partitioned and signed todifferent virtual networks; and each virtual network operator carries out base station selection, frequency band allocation and power control for the multicast user group signed to the virtual networkoperator, and in the major premise of ensuring limitation to a user communication rate and resources of the multicast group, the aim of maximization of system throughput is fulfilled. According to the invention, by combining a D2D communication technology with a multicast communication technology, the spectrum efficiency of a system can be promoted; and a wireless network virtualization technology is introduced, so that the users can acquire services with high service quality and high experience quality.

The invention requests for protecting a node re-distribution method in wireless network virtualization. The node re-distribution method comprises the following steps of: analyzing load conditions of various nodes in a wireless physical network at first, so that whether a re-distribution mechanism needs to be started or not can be judged; when the re-distribution mechanism needs to be started, selecting virtual nodes to be re-distributed preferentially according to the resource quantities requested by the virtual nodes and the influence degree InI of the virtual nodes; and finally, for the determined virtual nodes, re-distributing target physical nodes. The node re-distribution method disclosed by the invention aims to realize load balancing and increase the utilization rate of bottom physical resources, the receptance of virtual network requests and the average yield of the physical network through virtual node re-distribution.

The invention discloses a node cache substitution method in an information center wireless network virtualization network, the method comprises the following steps: a node receives a data packet c<k>sent by an upper-level node; a cache probability pik of the c<k> in the node and a dropping probability of each data packet cached in the node are calculated; if an average response hop number neededfor a user to ask for the c<k> from any node after the node caches the c<k> is less than the average response hop number needed for the user to ask for the c<k> from any node after the upper-level node caches the c<k>, and the data packet stored by the node already comprises the data packet of which the cache probability is less than the pik, the node discards the stored data packet of which the cache probability is less than the pik, and the node caches the c<k>; the node sends the c<k> to a lower-level node thereof; and a cache state of the node is updated. The technical scheme provided by the invention can effectively improve utilization rate of a node cache space and transmission efficiency of the network.

The invention provides an SDN framework based on network virtualization. The SDN framework based on network virtualization comprises a cloud service platform, network virtualization equipment, computing virtualization equipment and storage virtualization equipment. A double-layer cloud service network framework is provided. When the user requires to perform data accessing, the user logs in the cloud service platform to perform accessing through his client side, and the cloud service platform provides the network access service for the user through the network virtualization equipment, providesthe computing service for the user through the computing virtualization equipment and meets the data access requirement of the user through the storage virtualization equipment according to the access demand of the user.

The invention discloses a method for realizing simultaneous support of wired and wireless network applications in an intelligent set top box. The method comprises the following steps: the intelligent set top box starts wired network and wireless network simultaneously and keeps routing information and DNS address of the wired network and wireless network; when a new application is started, a network management system detects network type of a new application request; and if the network type of the new application request does not accord with the current network, the routing information and DNS address in a route table are changed into routing information and DNS address required by the new application, thereby realizing network dynamic switching. Through the route table, dynamic switching of the wired network and wireless network is realized, so that simultaneous support of wired and wireless network applications is realized; and compared with a conventional network management method for the intelligent set top box, the method is convenient and fast, high in efficiency and high in university.

The invention provides a method for acquiring wireless network utilization ratio of global system for mobile communication (GSM). The method comprises the following steps of: acquiring a first wireless network utilization ratio and a second wireless network utilization ratio according to an acquired first network parameter, full-network voice telephone traffic during busying of the system, full-network data telephone traffic during busying of the system and a preset second network parameter; adjusting the full-network voice telephone traffic during busying of the system or the full-network data telephone traffic during busying of the system if the difference between the two wireless network utilization ratios is not equal to zero; and acquiring the wireless network utilization ratio of the GMS according to the adjusted telephone traffic and the parameters. By the method for acquiring the wireless network utilization ratio of the GSM, the comprehensive service telephone traffic which is best matched with the current network configuration can be quickly acquired so as to acquire the optimal corresponding utilization ratio of the wireless network resources of the GMS.

The invention belongs to the technical field of wireless network virtualization, and discloses a wireless network virtualization method based on equivalent capacity in a single-cell LTE-A system. The method comprises the following steps: introducing an LTE-A uplink system as a system model and a wireless channel as a Rayleigh channel; representing the Rayleigh channel through a finite state Markov model, dividing a channel state threshold to acquire a state transition probability matrix; computing a probability distribution of a service rate in a scheduling slot; computing equivalent capacity information when each service process selects each resource distribution mode in one scheduling slot; establishing a target function of a resource allocation model with the maximum system equivalent capacity; and solving out a channel allocation variable of the resource allocation model by use of a branch and a bound method. The problem that the data is inaccurate due to the time-variant characteristic and the attenuation characteristic of a wireless channel is solved. The customization service is provided for the services types in different varieties, the overall overhead for the deployment and the operation of a mobile cellular network is lowered.

The invention discloses a distributed network virtualization system for an SDN (software defined network). The distributed network virtualization system comprises an SDN southbound protocol module, a kernel module, a virtualization layer module and a tenant application module, the SDN southbound protocol module can realize an SDN southbound protocol, the kernel module stores and manages low-level physical network data through distributed protocol Raft (replication and fault tolerant), different network virtualization systems are synchronized, and the virtualization layer module is used for realizing network virtualization. According to the distributed network virtualization system, an efficient network virtualization system is provided for the SDN by the aid of the advantages of protocol oblivious forwarding technique and distributed SDN controller open network operating system design, the requirements of reliability and expansibility of the network virtualization system can be met, and programmability of the virtualization SDN can also be improved.

Method and devices for optimizing wireless network connections in transportation vehicles are provided. An onboard computing device in a transportation vehicle identifies blackout area with severe wireless signal interference caused by nearby wireless access points in the blackout area. The wireless interference can be remedied by dynamically switching wireless channel for the in-vehicle wireless connection between the onboard computing device and a mobile device in the vehicle. The wireless interference can also be remedied by pre-caching the data needed for a content presentation during a time period when the vehicle travels within the blackout area.

The invention provides a virtual network mapping method based on a subgraph. The method comprises the following steps: using an undirected graph (the formula is as shown in the specification) to express a physical network according to node and link numbers of a virtual link request; using a corresponding undirected graph (the formula is as shown in the specification) to express a virtual network according to the node and link numbers of the virtual link request; calculating the degree of a current physical node a CPU utilization rate and link utilization rate according to the number of edges associated with each node, the CPU capacity of the physical node and the bandwidth of the physical link; extracting the subgraph corresponding to a physical network father graph based on load judgment conditions and network connection constraint conditions; and performing virtual mapping from the virtual network to the physical network, and calculating a corresponding gain and cost. The algorithm can reduce the computational complexity of the virtual mapping of a wireless network and improve the mapping time and efficiency while ensuring the same gain and relatively lower cost under the given physical resources, and the algorithm is especially suitable for application in real-time streaming media.

We disclose systems and methods of dynamically virtualizing a wireless communication network. The communication network is comprised of heterogeneous multi-RAT mesh nodes coupled to a computing cloud component. The computing cloud component virtualizes the true extent of the resources it manages and presents an interface to the core network that appears to be a single base station.

The invention relates to the technical field of mobile communication, and particularly relates to a resource discovery method in a wireless network virtualization environment. The method includes thefollowing steps: virtualizing underlying physical network resources to obtain virtual network resources, and storing the virtual network resources in a resource repository for resource discovery; andclustering the virtual network resources by using a classification attribute hierarchical clustering method based on information entropy weighting to generate clustered virtual network resources, wherein virtual network providers can find the virtual network resources required by users from the clustered virtual network resources. According to the scheme of the invention, the qualitative analysisof virtual network resource characteristics is transformed into quantitative analysis, the resource discovery delay can be effectively reduced, and the efficiency of virtual network configuration canbe improved.

Methods and apparatus are provided for wireless network optimization. Wireless network traffic is optimized by receiving redirected traffic based on one or more configuration rules; and applying the redirected traffic to a protocol optimizer that optimizes the wireless network traffic based on one or more optimization rules. A management interface is optionally provided to manage the network optimization appliance. A process monitor is optionally provided to monitor one or more process threads to determine if the process threads have stalled. The process monitor can monitor other components and can be monitored by at least one other component.