The current invention is applicable to a RAN-cache or proxy operating in a wireless mobile network that is functioning as a transparent inline device intercepting wireless mobile protocols such as UMTS, LTE, WIMAX, CDMA etc.), or a traffic off-load device connected to multiple interfaces towards the Core/Internet. The current invention identifies methods for pre-fetching content by emulating portions of a mobile client for gaining connectivity through the mobile-core network, or to use session contexts of other mobile clients in a way not to significantly effect charging and billing for the preloaded content. The pre-load decision of what to pre-load and when to pre-load may be locally derived within the RAN-cache/Proxy device, or in-coordination with a locally connected CDN (Content Delivery Network) device. Other embodiments of the current invention include the RAN-cache/Proxy providing interconnectivity from the locally connected CDN device to other CDN devices through the Mobile Core Network (SGSN/GGSN in UMTS, S-GW/P-GW in LTE etc.).

Content pre-fetching and cdn assist methods in a wireless mobile network

A method of learning and identifying two unidirectional GTP-U tunnels corresponding to a user equipment (UE) in a device placed in a LTE network, where the device acts as a transparent proxy intercepting user plane and control plane protocols on the S1 interface, is disclosed. Methods of pairing the two unidirectional tunnels that belong to same UE, when there is no control plane information or when there is Control Plane information, but the NAS portions of the S1 Control that contain bearer IP addresses are encrypted, are disclosed. Control plane and user plane methods for associating GTP-U tunnels and the corresponding bearer plane IP addresses are identified. Additionally, methods for detecting mobility of a UE, as it moves from the coverage area of one E-NodeB to another, are disclosed. Methods for constructing an eNodeB topology map are also disclosed.

Destination learning and mobility detection in transit network device in lte & umts radio access networks

Several protocols have been proposed to improve data accessibility and reduce query delay in MANETs. Some of these proposals have adopted the cooperative caching scheme, allowing multiple mobile hosts within a neighborhood to cache and share data items in their local caches. Cross-layer optimization has not been fully exploited to further improve the performance of cooperative caching in these proposals. In this paper we propose a cluster-based cooperative caching scheme. A cross-layer design approach is employed to further improve the performance of cooperative caching and prefetching schemes. The cross-layer information is maintained in a separate data structure and is shared among network protocol layers. The experimental results in the NS-2 simulation environment demonstrate that the proposed approach improves caching performance in terms of data accessibility, query delay and query distance compared to the caching scheme that does not adopt the cooperative caching strategy.

Cluster-Based Cross-Layer Design for Cooperative Caching in Mobile Ad Hoc Networks

Prefetching is an interesting technique for improving web performance by reducing the user-perceived latency when surfing the web. Nevertheless, due to its speculative nature, prefetching can increase the network traffic and the server load. This could negatively affect the overall system performance and decrease the quality of service. To minimize and maintain under control these adverse effects, in this paper we propose an intelligent prefetching mechanism that dynamically adjusts the aggressiveness of the prefetching algorithm at the server side. To this end, we also propose a traffic estimation model that permits to accurately calculate, in the server side, the extra load and traffic generated by the prefetching. The performance evaluation study shows that our proposal effectively regulates the adverse effects of web prefetching without affecting its benefits.

/pdf/an-intelligent-technique-for-controlling-web-prefetching-5bpg1mdtpi.pdf

An Intelligent Technique for Controlling Web Prefetching Costs at the Server Side

A Novel Location Aware Content Prefetching Technique for Mobile Adhoc Network

The enormous potential of locality based strategies like caching and prefetching to improve Web performance motivates us to propose a novel global framework for performance evaluation in scenarios where different parts of the Web architecture interact. Unlike existing proposals our approach is a fast and flexible tool that allows to represent faithfully the behaviour of each element of the architecture in order to study, reproduce, evaluate and design Web strategies to decrease the userpsilas perceived latency when surfing the Web.

/pdf/a-web-caching-and-prefetching-simulator-wcuipuaet8.pdf

A web caching and prefetching simulator

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A web caching and prefetching simulator