We consider a communication system in which status updates arrive at source node, and should be transmitted through network to the intended destination node. The are samples of random process under observation, as packets, also contain time stamp identify when sample was generated. age information available node is elapsed, since last received update In this paper, we model source-destination link using queuing theory, assume that it takes successfully transmit packet an exponentially...

We consider a system in which random status updates arrive at source node, and should be transmitted through wireless network to the intended destination node. The are samples of process, as packets, containing time stamp identify moment sample was generated. it takes successfully transmit packet is modeled an exponentially distributed service time. update age receiver elapsed since last received In this paper, we analyze case that node has capability manage arriving decide packets will...

We present our vision for a departure from the established way of architecting and assessing communication networks, by incorporating semantics information, defined not necessarily as meaning messages, but their significance, possibly within real-time constraint, relative to purpose data exchange. argue that research efforts must focus on laying theoretical foundations redesign entire process information generation, transmission, usage networked systems in unison developing advanced semantic...

We consider a single-cell multiple-input multiple-output (MIMO) downlink channel where linear transmission and reception strategy is employed. The base station (BS) transmitter equipped with scheduler using simple opportunistic beamforming strategy, which associates an intended user for each of the transmitted data streams. For case when scheduled users available at BS, we propose general method joint design transmit receive beamformers according to different optimization criteria, including...

Cooperative processing of transmitted signal from several multiple-input multiple-output (MIMO) base stations (BS) is considered for users located within a soft handover (SHO) region. The downlink resource allocation problem with different BS power constraints studied the orthogonal frequency division multiplexing system adaptive MIMO transmission. Joint design linear transmit and receive beamformers in multiuser transmission subject to per considered. A solution weighted sum rate...

Freshness of status update packets is essential for enabling services where a destination needs the most recent measurements various sensors. In this paper, we study information freshness single-server multi-source queueing models under first-come first-served (FCFS) serving policy. considered model, each source independently generates according to Poisson process. The updates evaluated by average age (AoI). We derive an exact expression AoI case with exponentially distributed service time,...

We provide distributed algorithms for the radio resource allocation problem in multicell downlink multi-input single-output systems. Specifically, problems of (1) minimizing total transmit power subject to signal-to-interference-plus-noise ratio (SINR) constraints each user and (2) SINR balancing are considered. propose a consensus-based algorithm fast solution method via alternating direction multipliers. First, we derive minimization power. Then, conjunction with bracketing method, is...

Information freshness is crucial for time-critical IoT applications, e.g., monitoring and control systems. We consider an status update system with multiple users, energy harvesting sensors, a wireless edge node. The users receive time-sensitive information about physical quantities, each measured by sensor. Users send requests to the node where cache contains most recently received measurements from To serve request, either commands sensor or retrieves aged measurement cache. aim at finding...

We consider the problem of weighted sum-rate maximization (WSRMax) for a set interfering links. It plays central role in resource allocation, link scheduling or finding achievable rate regions both wireline and wireless networks. This is known to be NP-hard. propose solution method, based on branch bound technique, which solves globally nonconvex WSRMax with an optimality certificate. Efficient analytic bounding techniques are introduced their impact convergence numerically evaluated. The...

The cross-layer utility maximization problem, which is subject to stability constraints for a multicommodity wireless network where all links share the same number of orthogonal channels, considered in this paper. We assume time-slotted network, channel gains randomly change from one slot another. optimal control policy can be decomposed into folloing three subproblems: 1) flow control; 2) next-hop routing and -node scheduling; 3) power rate control, also known as resource allocation (RA)....

This paper considers sequential compressed acquisition and progressive reconstruction of spatially temporally correlated sensor data streams in wireless networks (WSNs) via sensing (CS). We develop a framework based on sliding window processing, which the sink can efficiently reconstruct current sensors' readings from sequence periodically delivered CS measurements by exploiting joint compressibility Kronecker sparsifying bases. Specifically, we derive recursive recovery method utilizes...

We study the information freshness under three different source aware packet management policies in a status update system consisting of two independent sources and one server. The packets each are generated according to Poisson process served an exponentially distributed service time. derive average age (AoI) using stochastic hybrid systems (SHS) technique for policy. In Policy 1, queue can contain at most waiting same time (in addition service), 1 2. When server is busy arrival packet,...

We consider a resource-constrained IoT network, where multiple users make on-demand requests to cache-enabled edge node send status updates about various random processes, each monitored by an energy harvesting sensor. The serves users' deciding whether command the corresponding sensor fresh update or retrieve most recently received measurement from cache. Our objective is find best actions of minimize average age information (AoI) measurements upon request, i.e., AoI, subject per-slot...

The problem of weighted sum-rate maximization (WSRMax) in multicell downlink multiple-input single-output (MISO) systems is considered. known to be NP-hard. We propose a method, based on branch and bound technique, which solves globally the nonconvex WSRMax with an optimality certificate. Specifically, algorithm computes sequence asymptotically tight upper lower bounds it terminates when difference between them falls below pre-specified tolerance. Novel bounding techniques via conic...

We consider a distributed total transmit power minimization in multi-hop single-sink data gathering wireless sensor network by jointly optimizing the resource allocation and routing with given source rates. An inherent coupling optimal is taken into account via cross-layer optimization to increase energy efficiency of network. Instead distributing solution process horizontally commonly used dual decomposition, we apply consensus conjunction alternating direction method multipliers (ADMM). By...

We consider a status update system consisting of two independent sources, one server, and sink. The packets different sources are generated according to the Poisson process served an exponentially distributed service time. following packet management policy. When is empty, any arriving immediately enters server; when server busy, source waiting in queue replaced if new same arrives. derive average age information (AoI) considered M/M/1 queueing model by using stochastic hybrid systems (SHS)...

We consider a status update system where multiple sensors communicate timely information about various random processes to sink. The share orthogonal sub-channels transmit such in the form of packets. A central controller can control sampling actions trade-off between power consumption and freshness which is quantified by Age Information (AoI). jointly optimize action each sensor, allocation, sub-channel assignment minimize average total all sensors, subject maximum AoI constraint for...

Joint design of linear multiuser multiple-input-multiple-output (MIMO) transceiver subject to different quality service (QoS) constraints per user and with per-antenna or antenna group power is considered. Solutions for two optimization problems are proposed, i.e., balancing the weighted signal-to-interference-plus-noise ratio (SINR) data stream rate each scheduled minimum requirements user. The proposed joint algorithms compared corresponding optimal nonlinear transmission methods as well...

We consider a single-cell multiple-input multiple-output (MIMO) downlink channel where linear transmission and reception strategy is employed. The base station (BS) transmitter equipped with scheduler using simple opportunistic beamforming strategy, which associates an intended user for each of the transmitted data streams. For case when scheduled users available at BS, we propose general method joint design transmit receive beamformers according to different optimization criteria. proposed...

This paper addresses lossy distributed source coding for acquiring correlated sparse sources via compressed sensing (CS) in wireless sensor networks. Noisy CS measurements are separately encoded at a finite rate by each sensor, followed the joint reconstruction of decoder. We develop novel complexity-constrained variable-rate quantized method, which minimizes weighted sum between mean square error signal distortion and average encoding rate. The complexity is restrained pre-quantizing...

Freshness of status update packets is essential for enabling a wide range applications in wireless sensor networks (WSNs). Accordingly, we consider WSN where sensors communicate updates to destination by contending the channel access based on carrier sense multiple (CSMA) method. We analyze worst case average age information (AoI) and peak AoI from view one system all other have saturated queue. Numerical results illustrate importance optimizing contention window size packet arrival rate...

We consider a status update system consisting of two independent sources and one server in which packets each source are generated according to the Poisson process served an exponentially distributed service time. derive moment generating function (MGF) age information (AoI) for by using stochastic hybrid systems (SHS) under existing source-aware packet management policies we term self-preemptive non-preemptive policies. In both policies, (i.e., waiting queue server) can contain at most...

We consider a multi-source relaying system where independent sources randomly generate status update packets which are sent to the destination with aid of relay through unreliable links. develop transmission scheduling policies minimize weighted sum average age information (AoI) subject capacity and long-run resource constraints. formulate stochastic control optimization problem solve it using constrained Markov decision process (CMDP) approach drift-plus-penalty method. The CMDP is solved...