Newness and distinctiveness is claimed in the features of ornamentation as shown inside the broken line circle in the accompanying representation.

Display screen or portion thereof with graphical user interface

This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems Draft Amendment: Management Information Base Extensions

Interest in broadband wireless access (BWA) has been growing due to increased user mobility and the need for data access at all times. IEEE 802.16e based WiMAX networks promise the best available quality of experience for mobile data service users. Unlike wireless LANs, WiMAX networks incorporate several quality of service (QoS) mechanisms at the Media Access Control (MAC) level for guaranteed services for data, voice and video. The problem of assuring QoS is basically that of how to allocate available resources among users in order to meet the QoS criteria such as delay, delay jitter and throughput requirements. IEEE standard does not include a standard scheduling mechanism and leaves it for implementer differentiation. Scheduling is, therefore, of special interest to all WiMAX equipment makers and service providers. This paper discusses the key issues and design factors to be considered for scheduler designers. In addition, we present an extensive survey of recent scheduling research. We classify the proposed mechanisms based on the use of channel conditions. The goals of scheduling are to achieve the optimal usage of resources, to assure the QoS guarantees, to maximize goodput and to minimize power consumption while ensuring feasible algorithm complexity and system scalability.

https://www.cse.wustl.edu/~jain//papers/ftp/sched.pdf

Scheduling in IEEE 802.16e mobile WiMAX networks: key issues and a survey

Relaying and cooperation have re-emerged as important research topics in wireless communication over the past half-decade. Although multihop relaying for coverage extension in wireless networks is an old concept, it became practical only recently. Nowhere is this better illustrated than in the IEEE 802.16 working group, which has devoted a task group to incorporating relay capabilities in the foundation of mobile WiMAX-IEEE 802.16e-2005. Currently, this task group is in the process of finishing IEEE 802.16j, the multihop relay specification for 802.16. This amendment will be fully compatible with 802.16e-2005 mobile and subscriber stations, but a BS specific to 802.16j will be required for relays to operate. This article presents an introduction to the upcoming IEEE 802.16j amendment and provides insight about the obstacles that practical system designers face when incorporating relaying into a wireless broadband network.

The future of WiMAX: Multihop relaying with IEEE 802.16j

A first client device or system performs a method that includes retaining in memory registration information for a respective application indicating the respective application is registered for sharing application state with other client devices or systems. The method further includes storing an application state of a respective application, and detecting a transfer triggering condition. The transfer triggering condition includes presence of a second client device or system within a predefined proximity of the first client device or system, and the predefined proximity is a predefined proximity for near field communication. Furthermore, upon detecting the triggering condition, the first client device or system determines, in accordance with the stored registration information, that the respective application is registered for application state sharing, and transmits the application state of the respective application to the second client device or system.

Transferring application state across devices

Example method, apparatus, and computer program product embodiments are disclosed to enable near-field communication to be used in out-of-band initialization methods for connection setup for device-to-device communication. Example embodiments of the invention include a method comprising the steps of initiating, by a first device, an out-of-band near-field communication connection with a second device by transmitting wireless communication signals including necessary power for providing the near-field communication connection; sending a first short-range communication connection parameters for role determination, to the second device via the out-of-band near-field communication connection; receiving second short-range communication connection parameters for role determination, from the second device via the out-of-band near-field communication connection; selecting a role for the short-range communication connection by adopting short-range communication connection parameters for role determination that correspond to the role; discarding short-range communication connection parameters for role determination that are not adopted; and initiating the short-range communication connection according to the selected role using the adopted short-range communication connection parameters for role determination.

Device-to-device connection setup using near-field communication

Example method, apparatus, and computer program product embodiments are disclosed to enable out-of-band communications to be used in out-of-band initialization methods for simplified configuring of an in-band wireless docking environment for wireless devices. An example embodiment of the invention includes composing a wireless configuration for a plurality of devices in an in-band short-range wireless docking environment, by using out-of-band connections from a mobile device to the plurality of devices to send in-band short-range communication connection parameters including a timer value related to an expected completion time of a connection handover to in-band short-range communication.

Wireless docking with out-of-band initiation

Example method, apparatus, and computer program product embodiments are disclosed to enable out-of-band short-range communication carrier transport switching for connection setup in device-to-device communication. Example embodiments of the invention include a method comprising the steps of initiating, by a first device, an out-of-band short-range carrier transport switch with a second device by transmitting wireless communication signals for providing the out-of-band carrier communication connection, and sending, by the first device, in-band short-range carrier communication connection parameters including one or more parameters indicating a timer value of an interval related to an expected completion time of a transport switch procedure, to the second device via the out-of-band short-range carrier communication connection.

Delayed and conditional transport switch

Voice over IP (VoIP) is gaining an ever increasing popularity. As such, it nowadays represents one of the most studied test applications in the performance evaluation of wireline and wireless networks. However, a sound performance analysis of VoIP communications should be carried out at the user level, by computing perceptive metrics like the Mean Opinion Score (MOS) or the E-Model. In this paper, we present enhancements to the popular Network Simulator 2 (ns-2) that allow a reliable VoIP user-level performance analysis to be carried out through simulation. We show that computing performance measures at the IP level, which is usually done in ns-2, often leads to inaccurate results. Our code is publicly available at http://info.iet.unipi.it/~cng/ns2voip/.

/pdf/user-level-performance-evaluation-of-voip-using-ns-2-1oq84h6u3t.pdf

User-level performance evaluation of VoIP using ns-2

IEEE 802.16e specifies a connection-oriented centralized medium access control (MAC) protocol, based on time division multiple access (TDMA), which adds mobility support to the MAC protocol defined by the IEEE 802.16 standard for fixed broadband wireless access. To this end, orthogonal frequency division multiple access (OFDMA) is specified as the air interface. In OFDMA, the MAC frame extends over two dimensions: time, in units of OFDMA symbols, and frequency, in units of logical sub-channels. The base station (BS) is responsible for allocating data into the MAC frames so as to meet the quality of service (QoS) guarantees of the admitted connections of the mobile stations (MSs). This is done on a frame-by-frame basis by defining the content of map messages, which advertise the position and shape of data regions reserved for transmission to/from MSs. We refer to the latter operation as data region allocation. In this paper, we propose a sample data region allocation algorithm (SDRA), and we evaluate its performance by means of Monte Carlo analysis. The effectiveness of SDRA is assessed in several scenarios, involving mixed voice over IP (VoIP) and best effort MSs, different modulations, and frequency re-use plans.

Andrea Bacioccola

Papers

Device-to-device connection setup using near-field communication

Wireless docking with out-of-band initiation

Delayed and conditional transport switch

User-level performance evaluation of VoIP using ns-2

A downlink data region allocation algorithm for IEEE 802.16e OFDMA