Multicast Pushing With Content Request Delay Information
| Autor: | Yawei Lu, H. Vincent Poor, Wei Chen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Schedule
Protocol Independent Multicast Multicast Computer science business.industry computer.internet_protocol Distributed computing 05 social sciences 050801 communication & media studies 020206 networking & telecommunications Throughput 02 engineering and technology 0508 media and communications Source-specific multicast 0202 electrical engineering electronic engineering information engineering IP multicast Cache Xcast Electrical and Electronic Engineering business computer Computer network |
| Zdroj: | IEEE Transactions on Communications. 66:1078-1092 |
| ISSN: | 0090-6778 |
| Popis: | Multicasting can reduce network traffic in multiuser systems by serving multiple users simultaneously. The benefits of multicasting basically come from the overlapping and synchronism of user requests. Pushing and caching are techniques that prestore content items in buffers closer to users based on the prediction of user requests, thereby providing a promising approach to eliminating the asynchronism of user requests and creating multicasting opportunities. This paper studies a multiuser wireless communication system, in which the buffers for caching are deployed in the user terminals. Based on the request delay information (RDI) which describes when the users request content items in a deterministic or statistical way, a joint pushing and caching (JPC) method is presented to schedule the content items pushed by the base station and cached in the user buffers. In this paper, multicasting JPC systems work in two modes, without or with the feedback of RDI. Furthermore, RDI is classified into three forms, namely, noncausal, statistical, and causal. Static and dynamic JPC policies are, respectively, proposed for the two work modes. In addition, the effective throughput resulting from JPC under the three forms of RDI is demonstrated via theoretical analysis and simulation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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