Uplink Scheduling and Power Allocation for M2M Communications in SC-FDMA-Based LTE-A Networks With QoS Guarantees
Citations
290 citations
116 citations
Cites background from "Uplink Scheduling and Power Allocat..."
...cluster MTCDs is to exploit the differences in services [129], wireless technologies, or the combination of services and wireless technologies [130], [131]....
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112 citations
Cites methods from "Uplink Scheduling and Power Allocat..."
...4 and 5 compare the proposed scheme with the snapshotbased throughput optimal algorithm [20], which is adopted as the baseline algorithm....
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...In [20], a joint subchannel and power allocation scheme was proposed to optimize the sum throughput of MTC devices based on Lagrange dual decomposition....
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89 citations
82 citations
Cites background from "Uplink Scheduling and Power Allocat..."
...To be more specific, we assume an orthogonal partitioning of resources, namely, the spectrum resources of cellular networks are partitioned into time-frequency resource blocks (RBs) [35], and each RB is allocated to a single CU....
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References
6,469 citations
"Uplink Scheduling and Power Allocat..." refers background in this paper
...Assume that channel coefficient hm is given by hm = Fm √ 1/Zm , where Fm represents the channel fading coefficient and Zm is the path loss [17]....
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1,634 citations
"Uplink Scheduling and Power Allocat..." refers background in this paper
...property, in [13] and [14], it is indicated that for a given number of RBs, the resource allocation problem in an OFDMA system...
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...One of the well known approaches to solve OFDMA resource allocation problem is to exploit the time-sharing property [14]....
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1,469 citations
"Uplink Scheduling and Power Allocat..." refers background or methods in this paper
...The effective capacity [16] for the mth M2M device, defined as the maximum constant arrival rate that a given service process...
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...However, due to the computational complexity, we use an intuition given in [16] and extract the QoS exponent θ(λ) through the concept of following equation:...
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...As discussed in Section II, the effective capacity [16] for the mth M2M device to satisfy QoS requirement specified by θ is given by...
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...Thus, to facilitate an efficient support of QoS for M2M communications in LTE-A networks, we utilize effective capacity concept [16] in order to model a wireless channel in terms of QoS metrics....
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1,328 citations
"Uplink Scheduling and Power Allocat..." refers background or methods in this paper
...3GPP uses single carrier frequency division multiple access (SC-FDMA) [12] as the UL multiple access scheme....
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...We formulate a framework as a sum-throughput maximization problem, while respecting all the constraints associated with SC-FDMA RB and power allocation in the LTE-A UL networks....
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...Afterward, the sum-throughput maximization resource allocation problem is formulated as follows: T = max X ,P M∑ m=1 J∑ j=1 xm,jRm,j subject to a) J∑ j=1 xm,jRm,j ≥ Rminm ∀m ∈ M b) 0 ≤ Pm,k(j ) ≤ Ps ∀m ∈ M,k ∈ K c) J∑ j=1 xm,jPm,j ≤ PT ∀m ∈ M d) Pm,k(j ) = Pm,l(j ) ∀m ∈ M,k ∈ K, l ∈ L e) xm,j ∈ 0, 1 ∀m ∈ M, j ∈ J f) M∑ m=1 J∑ j=1 xm,jW m k,j = 1 ∀k ∈ K g) J∑ j=1 xm,j = 1 ∀m ∈ M. (13) The objective of the optimization problem given in (13) is power and RB allocation for M2M devices so that the sumthroughput of whole network is maximized, subject to QoS requirements provisioning for different M2M devices along with different constraints in a SC-FDMA system....
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...The use of SC-FDMA in the UL of LTE-A networks imposes certain restrictions on power and RB allocation [12], which can be explained as follows....
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...As the BIP turns the problem into an extremely complex problem, also due to the aforementioned constraint in SC-FDMA (i.e., multiple RBs allocated to an M2M device should be adjacent), we provide an effective algorithm, which provides throughput maximization with a polynomial complexity, which is much more practical....
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571 citations
"Uplink Scheduling and Power Allocat..." refers background in this paper
...In the literature, some approaches have been studied for controlling PRACH overload problem [4]–[11], which will be explained in the next section....
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