On Buffering at the Relay Node in LTE-Advanced

Abstract

In this paper, we study the performance of a LTE-A relay-aided system with limited buffer size at the relay node. In presence of a link quality mismatch between the backhaul and access links of the relay node, we analyze the impact of the buffer size on the occurrence of undesirable events such as buffer overflows or underflows. Based on simulations, we find out that the size of the buffer at the RN can positively influence the throughput performance of the served users. Finally, we observe that in different relaying conditions, the buffer size setting plays an important role on the overall system performance, especially in terms of underflow and overflow occurrence.

Mimicking Full-Duplex Relaying Using Half-Duplex Relays With Buffers

“…It is worth mentioning that, in practice, wireless nodes are equipped with buffers [13], [26], and hence, in the proposed scheme, we only take advantage of them. Note that, in most relay selection schemes, the SNRs of the links are required for selection.…”

LTE-Advanced Radio Access Enhancements: A Survey

“…The performances of the DF and AF relays were compared in [189][190][191] and concluded that DF relays are more suitable for the LTE-Advanced system. The following types of DF, namely Layer 3 (L3) relays, can be categorised as [192]:…”

QoS-aware resource management for LTE-Advanced relay-enhanced network

“…This might not be critical nor even noticeable if the system load is low (i.e., RN buffers are never fully loaded). However, as indicated in the work of Vitiello et al [28], if the system load is high, RN buffers might get congested and become bottlenecks for multi-hop transmissions. As shown in the author's earlier work [29], the impact of limited capacity of the RN buffers is especially noticeable if capacities of the RN BH and AC links are improperly balanced, e.g., as a result of sub-optimal resource allocation.…”