Super-MAC: Data Duplication and Combining for Reliability Enhancements in Next-Generation Networks

Ahmed, Abdul Mateen and Patel, Aaqib and Khan, Mohammed Zafar Ali (2021) Super-MAC: Data Duplication and Combining for Reliability Enhancements in Next-Generation Networks. IEEE Access, 9. pp. 54671-54689. ISSN 2169-3536

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Abstract

A piece of user equipment (UE), typically, has access to multiple radio access technologies (RATS). Moreover, apart from the standard primary cellular network, the secondary cellular networks can assist the primary network in downlink UE communications. In this way, the data can reach the UEthrough multiple entities. This paper exploits the multiple entities' idea by proposing a cross-layer scheme that combines data to improve the block error rate (BLER) and the throughput. For this, we define a new entity, called the super-MAC, just above the Medium Access Control (MAC) layer. Morespecifically, we propose data duplication (at the transmitter) and combining (at UE) at the super-MAC, where the super-MAC gets the Radio Link Layer protocol data unit (RLC-PDU) and sends multiple-copies across various interfaces to different MAC-entities. In doing so, the super-MAC attaches a unique sequence number to a group of RLC-PDUs together. At the UE, the data from different MAC entities are combined at super-MAC to clear any block error. The super-MAC operates in between the CyclicRedundancy Check and Forward Error Correction stages of the HARQ process. The additional complexityintroduced by the scheme is negligible in front of the existing operations. Moreover, the average latency improves due to the significant improvement in the Block Error rate (BLER) that the combining scheme offers over the BLER of the conventional standalone system. Also, since the errors significantly reduce, the throughput shows significant improvement. Finally, the proposed scheme is an advancement in HARQ to reduce retransmissions, and hence it is suitable for the next-generation networks like B5G or 6G to adopt the super-MAC.

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IITH Creators:

IITH Creators	ORCiD
Ahmed, Abdul Mateen	UNSPECIFIED
Patel, Aaqib	UNSPECIFIED
Khan, Mohammed Zafar Ali	UNSPECIFIED

Item Type:

Article

Uncontrolled Keywords:

Cross layer schemes; Cyclic redundancy check; Link layer protocol; Medium access control layer; Multiple radio access technology (RATs); Primary cellular networks; Reliability enhancement; Standalone systems

Subjects:

Electrical Engineering

Divisions:

Department of Electrical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

15 Jul 2021 07:25

Last Modified:

15 Jul 2021 07:25

URI:

http://raiithold.iith.ac.in/id/eprint/8336