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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Tianyi Chen Hangguan Shan Xin Wang |
| Copyright Year | 2013 |
| Description | Author affiliation: Dept. of Commun. Sci. & Eng., Fudan Univ., Shanghai, China (Tianyi Chen; Xin Wang) || Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou, China (Hangguan Shan) |
| Abstract | In this paper, we consider a cellular/infostation integrated network which supports on-demand data service delivery over a wireless link to users in a high-speed train. For the requests with different lifetimes and prices that they are willing to pay, we develop the optimal packet schedule that aims at earning the maximum revenue. To this end, we formulate the problem as an integer linear program (ILP) which is in general NP-hard. However, by exploring the special structure of the formulated ILP, we show that this problem can be turned into a P problem that admits efficient solvers. Specifically, we propose a novel Checker algorithm and prove that this algorithm is guaranteed to find the offline optimal schedule for the intended problem in polynomial time, when the number of total requests is proportional to the length of the total transmission time span. Based on the relevant insights, a class of efficient online Checker algorithms are then developed to approach the optimal schedule when a-priori knowledge of service demands and/or wireless channel capacities is not available in practical systems. It is shown that these online algorithms have a competitive ratio of 1/2, i.e., total revenue earned by them is at least half as much as the revenue earned by offline optimal schedule. Simulation results are provided to demonstrate the merit of the proposed algorithms. |
| Starting Page | 4507 |
| Ending Page | 4512 |
| File Size | 328080 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781479928514 |
| DOI | 10.1109/GLOCOMW.2013.6855661 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-12-09 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Wireless communication Schedules algorithm analysis integer linear program Scheduling algorithms packet schedule Optimal scheduling Coherence wireless link On-demand services Polynomials Vehicles |
| Content Type | Text |
| Resource Type | Article |
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