A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission
Content caching at the base stations (BSs) is a promising strategy that can provide improved quality-of-service (QoS) provisioning for content-centric services, and at the same time reduce instantaneous backhaul payload. This paper focuses on the applications of the caching mechanism in the downlink...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2018-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8125681/ |
| _version_ | 1819163038201151488 |
|---|---|
| author | Fasheng Zhou Lisheng Fan Ning Wang Gaoyong Luo Jie Tang Wei Chen |
| author_facet | Fasheng Zhou Lisheng Fan Ning Wang Gaoyong Luo Jie Tang Wei Chen |
| author_sort | Fasheng Zhou |
| collection | DOAJ |
| description | Content caching at the base stations (BSs) is a promising strategy that can provide improved quality-of-service (QoS) provisioning for content-centric services, and at the same time reduce instantaneous backhaul payload. This paper focuses on the applications of the caching mechanism in the downlink of coordinated multipoint (CoMP) transmission, where the collaborating BSs cooperatively serve the user equipments (UEs). A cache-aided transmission scheme for downlink CoMP with limited local cache resources at the BSs is proposed to improve QoS provisioning in terms of outage performance. In order to cache files more efficiently while guaranteeing the QoS, the contents are divided into two sets, a popular set and a less popular set, according to their popularity profile following the Zipf model. The popular files are cached at all the BSs, while the less popular files are cached only at part of the BSs in a cache cluster subject to the strategy design. Furthermore, based on the popularity of the requested files, UEs are categorized into two groups and the notion of request competition between the two groups is introduced. The corresponding request competition model and admission probabilities for transmission requests are analyzed. Based on the request competition model, the best cache placement strategy for the popular and less popular sets that minimizes the average outage probability is derived. Numerical results show that the proposed cache-aided CoMP scheme outperforms the baseline traditional caching strategies in terms of the average transmission outage. |
| first_indexed | 2024-12-22T17:37:46Z |
| format | Article |
| id | doaj.art-8e6924d0459a42139c60b91f6d5e7621 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-22T17:37:46Z |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-8e6924d0459a42139c60b91f6d5e76212022-12-21T18:18:29ZengIEEEIEEE Access2169-35362018-01-0161416142710.1109/ACCESS.2017.27791238125681A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint TransmissionFasheng Zhou0https://orcid.org/0000-0002-2174-6069Lisheng Fan1Ning Wang2Gaoyong Luo3Jie Tang4https://orcid.org/0000-0003-0619-0338Wei Chen5https://orcid.org/0000-0002-9066-1448School of Physics and Electronic Engineering, Guangzhou University, Guangzhou, ChinaSchool of Computer Science and Educational Software, Guangzhou University, Guangzhou, ChinaSchool of Information Engineering, Zhengzhou University, Zhengzhou, ChinaSchool of Physics and Electronic Engineering, Guangzhou University, Guangzhou, ChinaSchool of Electronic and Information Engineering, South China University of Technology, Guangzhou, ChinaDepartment of Electronic Engineering, Tsinghua University, Beijing, ChinaContent caching at the base stations (BSs) is a promising strategy that can provide improved quality-of-service (QoS) provisioning for content-centric services, and at the same time reduce instantaneous backhaul payload. This paper focuses on the applications of the caching mechanism in the downlink of coordinated multipoint (CoMP) transmission, where the collaborating BSs cooperatively serve the user equipments (UEs). A cache-aided transmission scheme for downlink CoMP with limited local cache resources at the BSs is proposed to improve QoS provisioning in terms of outage performance. In order to cache files more efficiently while guaranteeing the QoS, the contents are divided into two sets, a popular set and a less popular set, according to their popularity profile following the Zipf model. The popular files are cached at all the BSs, while the less popular files are cached only at part of the BSs in a cache cluster subject to the strategy design. Furthermore, based on the popularity of the requested files, UEs are categorized into two groups and the notion of request competition between the two groups is introduced. The corresponding request competition model and admission probabilities for transmission requests are analyzed. Based on the request competition model, the best cache placement strategy for the popular and less popular sets that minimizes the average outage probability is derived. Numerical results show that the proposed cache-aided CoMP scheme outperforms the baseline traditional caching strategies in terms of the average transmission outage.https://ieeexplore.ieee.org/document/8125681/Cache-aided communicationCoMPcontent popularityedge cachingmultiuser request competition |
| spellingShingle | Fasheng Zhou Lisheng Fan Ning Wang Gaoyong Luo Jie Tang Wei Chen A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission IEEE Access Cache-aided communication CoMP content popularity edge caching multiuser request competition |
| title | A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission |
| title_full | A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission |
| title_fullStr | A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission |
| title_full_unstemmed | A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission |
| title_short | A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission |
| title_sort | cache aided communication scheme for downlink coordinated multipoint transmission |
| topic | Cache-aided communication CoMP content popularity edge caching multiuser request competition |
| url | https://ieeexplore.ieee.org/document/8125681/ |
| work_keys_str_mv | AT fashengzhou acacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT lishengfan acacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT ningwang acacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT gaoyongluo acacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT jietang acacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT weichen acacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT fashengzhou cacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT lishengfan cacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT ningwang cacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT gaoyongluo cacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT jietang cacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission AT weichen cacheaidedcommunicationschemefordownlinkcoordinatedmultipointtransmission |