In this Letter, the authors consider a multi-unicast flow wireless communication system with a retransmission scheme. The effective capacity (EC) is used as a performance metric in order to make use of the recurrence relation approach. They also take advantage of network coding (NC) as combined with automatic repeat request (ARQ) protocol (NC-ARQ), for more robust communication. The authors' main contribution, in this work, is the derivation of the EC for M-user NC-ARQ using only the opportunity of XoR-ing M packets. They then, focus on a 3-user system and derive the EC using the opportunity of XoR-ing packets for 3 and 2 users. An interesting result is the fact that, contrary to expectation, as the number of users in a network that uses NC-ARQ increases, the performance in terms of EC increases as well, depending on how the sender schedules and manages the retransmissions.

References

1. 1)
  - 11. Akin, S., Fidler, M.: ‘Backlog and delay reasoning in HARQ system.’ 27th Int. Teletraffic Congr, Ghent, Belgium, September 2015, pp. 185–193.
2. 2)
  - 2. Larsson, P., Smida, B., Koike-Akino, T., et al: ‘Analysis of network coded HARQ for multiple unicast flows’, IEEE Trans. Commun., 2013, 61, (2), pp. 722–732 (doi: 10.1109/TCOMM.2012.121112.110202).
3. 3)
  - 12. Sassioui, R., Szczecinski, L., Le, L., et al: ‘AMC and HARQ: effective capacity analysis’, Wireless Communication and Networks Conf., Doha, Qatar, April 2016, pp. 1–7.
4. 4)
  - 1. Ahlswede, R., Cai, N., Li, S.-Y., Yeung, R.: ‘Network information flow’, IEEE Trans. Inf. Theory, 2000, 46, (4), pp. 1204–1216 (doi: 10.1109/18.850663).
5. 5)
  - 17. Almehmadi, F., Badarneh, O.: ‘On the effective capacity of Fisher-Snedecor F fading channels’, Electron. Lett., 2018, 54, (18), pp. 1068–1070 (doi: 10.1049/el.2018.5479).
6. 6)
  - 13. Larsson, P., Gross, J., Al-Zubaidy, H., et al: ‘Effective capacity of retransmission schemes: a recurrence relation approach’, IEEE Trans. Commun., 2016, 64, (11), pp. 4817–4835 (doi: 10.1109/TCOMM.2016.2602864).
7. 7)
  - 8. Larsson, P., Rasmussen, L.K., Skoglund, M.: ‘Multilayer network-coded ARQ for multiple unicast flows’, Swedish Commun. Technologies Workshop (Swe-CTW), Lund, Sweden, October 2012, pp. 13–18.
8. 8)
  - 3. Larsson, P., Rasmussen, L.K., Skoglund, M.: ‘Throughput analysis of ARQ schemes in Gaussian block fading channels’, IEEE Trans. Commun., 2014, 62, (7), pp. 2569–2588 (doi: 10.1109/TCOMM.2014.2321383).
9. 9)
  - 3. Al-Hmood, H., Al-Raweshidy, H.: ‘Unified approaches based effective capacity analysis over composite α-η-μ/gamma fading channels’, Electron. Lett., 2018, 54, (13), pp. 852–853 (doi: 10.1049/el.2018.1006).
10. 10)
  - 9. Xu, K., Ma, W., Zhu, L., et al: ‘NTC-HARQ: network-turbo-Coding based HARQ protocol for wireless broadcasting system’, IEEE Trans. Veh. Technol., 2015, 64, (10), pp. 4633–4644 (doi: 10.1109/TVT.2014.2374235).
11. 11)
  - 1. Li, S., Dou, Z., Wang, F., et al: ‘Energy efficiency of five broadcast-based ARQ protocols in multi-hop wireless sensor networks’, IET Commun., 2019, 13, (15), pp. 2243–2253 (doi: 10.1049/iet-com.2018.6098).
12. 12)
  - 4. Senapati, R., Pati, H.K.: ‘Impact of HARQ on voLTE cell capacity for mixed radio condition in duplex mode’, Electron. Lett., 2018, 54, (25), pp. 1460–1462 (doi: 10.1049/el.2018.5622).
13. 13)
  - 7. Zhang, J., Dai, L., Gerstacker, W.H., et al: ‘Effective capacity of communication systems over κ–μ shadowed fading channels’, Electron. Lett., 2015, 51, (19), pp. 1540–1542 (doi: 10.1049/el.2015.1032).
14. 14)
  - 10. Larsson, P., Johansson, N.: ‘Multi-user ARQ’, 2006 IEEE 63rd Vehicular Technology Conference, Melbourne, VIC, Australia, May 2006, pp. 2052–2057.
15. 15)
  - 7. Ahmad, Z., Ahmad, I., Love, D., et al: ‘Analysis of two-unicast network-coded hybrid-ARQ with unreliable feedback’, IEEE Trans. Veh. Technol., 2018, 67, (11), pp. 10871–10885 (doi: 10.1109/TVT.2018.2869911).
16. 16)
  - 14. Shi, Z., Tsiftsis, T.A., Tan, W., et al: ‘Effective capacity for renewal service processes with applications to HARQ systems’, IEEE Trans. Commun., 2019, 67, (9), pp. 6556–6571 (doi: 10.1109/TCOMM.2019.2921768).
17. 17)
  - 6. Wu, D., Negi, R.: ‘Effective capacity: a wireless link model for support of quality of service’, IEEE Trans. Wirel. Commun., 2003, 24, (5), pp. 630–643 (doi: 10.1109/TWC.2003.814353).

Effective capacity of multi-unicast flows using network coded-ARQ

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