Adaptive delay optimization of multicast-enabled coded caching in device-to-device networks

Zhong, Liu; Zheng, Xueqian; Lin, Jie; Cao, Yang; Ju, Shenggen

doi:10.23919/jcc.2020.01.003

Cited by 3 publications

(7 citation statements)

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“…Coded caching-based transmission schemes have also been introduced to D2D networks to improve the overall performance [36]- [42]. An infrastructure-less CC network is considered in [36], where the D2D is the only transmission link.…”

Section: A Related Workmentioning

confidence: 99%

“…Thus, to minimize the total transmission time, the authors in [41] optimally divide the transmission load into D2D and DL parts. Unlike [36]- [41] with fixed rates assumption, the authors in [42] consider a multi-user single-input-single-output (SISO) scenario where transmission rates are changed depending on channel conditions. In this regard, D2D transmissions are utilized along with the DL transmission to decrease the transmission time.…”

Section: A Related Workmentioning

confidence: 99%

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D2D Assisted Multi-Antenna Coded Caching

et al. 2023

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A device-to-device (D2D) aided multi-antenna coded caching scheme is proposed to improve the average delivery rate and reduce the downlink (DL) beamforming complexity. Novel beamforming and resource allocation schemes are proposed where local data exchange among nearby users is exploited. The transmission is split into two phases: local D2D content exchange and DL transmission. In the D2D phase, subsets of users are selected to share content with the adjacent users directly. In this regard, a low complexity D2D mode selection algorithm is proposed to find the appropriate set of users for the D2D phase with comparable performance to the optimal exhaustive search. During the DL phase, the base station multicasts the remaining data requested by all the users. We identify scenarios and conditions where D2D transmission can reduce the delivery time. Furthermore, we demonstrate how adding the new D2D phase to the DL-only scenario can significantly reduce the beamformer design complexity in the DL phase. The results further highlight that by partly delivering requested data in the D2D phase, the transmission rate can be boosted due to more efficient use of resources during the subsequent DL phase. As a result, the overall content delivery performance is greatly enhanced, especially in the finite signal-to-noise (SNR) regime.INDEX TERMS Multi-antenna communications, coded caching, multicast beamforming, D2D communication.

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Section: A Related Workmentioning

confidence: 99%

Section: A Related Workmentioning

confidence: 99%

D2D Assisted Multi-Antenna Coded Caching

et al. 2023

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“…In this regard, to minimize the total transmission time, the authors in [31] divide the transmission load into device-to-device and downlink portions optimally. Different from the studies mentioned above, where error-free links with constant capacity are considered, the work [32] considers a multi-user single-input-single-output system where link rates change based on the channel conditions. In this regard, to decrease the delivery delay (transmission time), the authors in [32] assume that device-to-device transmissions are available along with the downlink transmission.…”

Section: Introductionmentioning

confidence: 99%

“…Different from the studies mentioned above, where error-free links with constant capacity are considered, the work [32] considers a multi-user single-input-single-output system where link rates change based on the channel conditions. In this regard, to decrease the delivery delay (transmission time), the authors in [32] assume that device-to-device transmissions are available along with the downlink transmission. Thus, based on users' neighboring status, the base station decides whether to transmit a sub-file in downlink or device-to-device transmission.…”

Section: Introductionmentioning

confidence: 99%

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D2D Assisted Beamforming for Coded Caching

Mahmoodi

Kaleva

Shariatpanahi

et al. 2020

2020 IEEE Wireless Communications and Networking Conference (WCNC)

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Device-to-device aided multicast beamforming design for multi-antenna coded caching is explored to improve the per-user rate and mitigate the beamformer complexity. Novel beamforming and resource allocation schemes are proposed where the local cache content exchange among nearby users is exploited. The transmission is split into two phases: local D2D content exchange and downlink transmission. In the D2D phase, subsets of users are selected to share content with the adjacent users directly. The downlink phase utilizes multicast beamforming by the base station to simultaneously serve all users to fulfill the remaining content requests. A low complexity D2D-multicast mode selection algorithm is proposed with comparable performance to the optimal exhaustive search. Furthermore, D2D transmission scenarios and conditions useful for minimizing the overall delivery time are identified. Finally, we show that introducing the new device-to-device phase to the existing works significantly reduces the beamformers' complexity in the downlink phase. The results further highlight that by exploiting the direct D2D exchange of file fragments, the common multicast rate for delivering the remaining file fragments in the downlink phase is increased. As a result, overall content delivery performance is greatly enhanced, especially in the finite signal-to-noise (SNR) regime.

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