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The high risk of random access collisions leads to huge challenge for the deployment massive Machine-Type Communications (mMTC), which cannot be sufficiently overcome by current solutions in LTE/LTE-A networks such as the extended access barring (EAB) scheme. The recently studied approaches of grouped random access have shown a great potential in simultaneously reducing the collision rate and the...
The core innovation in future 5G cellular networks-network slicing, aims at providing a flexible and efficient framework of network organization and resource management. The revolutionary network architecture based on slices, makes most of the current network cost models obsolete, as they estimate the expenditures in a static manner. In this paper, a novel methodology is proposed, in which a value...
This paper investigates the resource allocation problem for uplink multiple-access relay channels (MARC) with network coding. Firstly, the difference between traditional relay channels and MARC is presented, and then a joint optimization problem considering power allocation and relay selection is formulated to maximize the sum-rate under total power constraint. The optimal algorithm is proposed by...
In this paper, a network coding broadcast (NC-BC) scheme is proposed to improve the spectral efficiency for multiple-input and multiple-output (MIMO) transmissions. Particularly by network coding the base station broadcast message with each user message respectively, NC-BC can save the radio resource allocated for base station broadcasting, which is necessary in conventional time division-based scheme...
In this paper, a denoise-and-forward network coding (DNF-NC) scheme is proposed for multiple-input and multiple-output (MIMO) two-way relaying channels. Specifically the relay jointly detects the M-quadrature amplitude modulation (M-QAM) messages from two sources, and remaps the network coded detections into the same modulation mode. Furthermore, the precoding design for DNF-NC is studied to minimize...
This paper investigates optimal resource allocation in orthogonal frequency division multiplexing (OFDM) based multiple two-way relay systems operating with analog network coding (ANC) protocol. We formulate a joint optimization problem considering power allocation, relay selection and subcarrier paring to maximize the sum capacity under individual power constraints on each node. By applying dual...
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