期刊
IEEE WIRELESS COMMUNICATIONS LETTERS
卷 8, 期 5, 页码 1506-1509出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2019.2924631
关键词
Hybrid satellite-terrestrial relay network; wireless caching; outage probability; relay selection
资金
- Research Project of NUDT [ZK18-02-11]
- NSFC [61471392]
Hybrid satellite-terrestrial relay network (HSTRN) has been viewed as a flexible solution to be developed with the heterogeneous devices, integrated systems, and infrastructures for future wireless communications. To alleviate the spectrum shortage and meet the requirements of improved spectral efficiency, this letter incorporates the wireless content caching into HSTRN, where two representative cache placement schemes are considered, namely, the most popular content-based scheme, and the uniform content-based caching scheme. Specifically, the analytical expressions for the outage probability of considered HSTRN with different cache placement schemes are derived. Simulation results are provided to validate the theoretical analysis and confirm the substantial performance improvement of proposed schemes over the traditional approach without caching capabilities.
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