Showing papers by "Rath Vannithamby published in 2011"

User equipment and method for quality of experience based discontinuous reception in lte-a networks

Abstract: Embodiments of user equipment (UE) and methods for quality-of-experience (QoE) based discontinuous reception (DRX) in 3GPP LTE-A networks are generally described herein. In some embodiments, a UE is configured to select one of a plurality of DRX parameter sets based on current application requirements and send an indication to an enhanced Node B (eNB) to indicate the selected DRX parameter set. The UE may enter DRX mode in accordance with the selected DRX parameter set. Each DRX parameter set may include an on-duration time, a DRX cycle length, and a DRX inactivity timer. In some embodiments, each DRX parameter set may be associated with a DRX parameter set index, and the UE may indicate one of the DRX parameter set indices to the eNB to select an initial DRX parameter set or to request switching to a different DRX parameter set in response to changing application requirements.

Random access techniques for fixed devices in mobile broadband networks

Abstract: Briefly, in accordance with one or more embodiments, a fixed device performs a cell search to search for one or more cells on a network and determines a transmit power level to communicate with one of the cells of the network. The fixed device sets a frequency of updating the transmit power level for communication with a cell on the network, wherein the frequency of updating the transmit power level is reduced for the fixed device with respect to a mobile device.

System acquisition mechanism for fixed devices in mobile broadband networks

Abstract: Briefly, in accordance with one or more embodiments, a fixed device synchronizes with a downlink channel of a network, acquires a master information block including a last system update time; and executes cell selection without acquiring other system information if the last system update time is before the last system access time. Furthermore, the fixed device may listen only for system information block messages that it needs, and ignore other system information blocks. A bitmap may indicate which system information block messages should be listed to for fixed devices, and which may be ignored. In some embodiments, one or more system information blocks may be designated for fixed devices.

Analyzing mobile applications and power consumption on smartphone over LTE network

Abstract: The explosive number of applications now available on smart phone type of devices and the availability of high-speed mobile broadband connectivity through 4G networks such as LTE has only increased the challenges in improving battery life of these devices In this paper, we illustrate the 4G power consumption issues through traffic traces and power measurements on LTE device over commercial LTE network We analyzed the traces of various applications to understand the traffic characteristics We also measured the power consumption of the various components of the device This paper provides the cdf's of the packet size and packet inter-arrival times of background traffic of common applications (eg, Skype, Google Talk, Twitter etc), and power consumption values and duration of low-power states which are crucial for the innovations and implementation of efficient power optimization mechanisms in LTE networks

Handling measurements and reporting for fixed devices in mobile broadband networks

Abstract: Measurement requirements for user equipment may be reduced or eliminated where the user equipment is a fixed device. In such case, the measurement requirement may be less useful. In machine-to-machine communications, bandwidth may be increased and power consumption may be reduced in some embodiments.

Techniques for initiating communication in a wireless network

Abstract: Techniques are described for a device to request a new service flow for best effort (BE) category traffic to assign a priority to the new service flow. For example, a Traffic Priority parameter in a media access control (MAC) message can be used to transmit the priority level for a new BE category service flow. The MAC message can be an AAI DSA-REQ message (specified in IEEE 802.16m draft 9 (2010)). Either a base station or a mobile station can request a new service flow using the MAC message.

Differentiating fixed devices from mobile devices in mobile broadband networks

Abstract: Fixed devices may be distinguished from mobile devices in a broadband wireless network. Fixed devices may be given an identifier that identifies the device as a fixed device.

Link-aware application source-rate control technique

Abstract: A system and method for adapting the source rate of a Voice-over-Internet-Protocol-type (VoIPtype) application. A MAC Layer device outputs information related to a congestion condition of a wireless link and information related to a Round Trip Time (RTT) of an end-to-end connection of the wireless link, the wireless link being for communicating data generated by an application operating on the device, and comprising a source rate of data generated by the application and a Packet Inter-arrival Time (PIT) for the data generated by the application. A rate controller determines a source rate of the application and/or the PIT based on the information related to the congestion condition of the wireless link and the information related to the RTT of the end-to-end connection of the wireless link.

Group resource allocation systems and technology

Abstract: PROBLEM TO BE SOLVED: To provide a group resource allocation system and a technology. SOLUTION: Embodiments of a system and a method for group resource allocation are generally described. Other embodiments may be described and claimed. COPYRIGHT: (C)2011,JPO&INPIT

Rationalised MCS candidate tables for AMC, multiple group GRA and hierarchical/best-m CQI reporting for Wimax

Abstract: The invention has three main elements Firstly the system calculates a matrix of the number of resource units (RU) (eg slots, sub-carriers) required for each combination of modulation and coding scheme (MCS) and media access control (MAC) protocol data unit (MPDU) Where multiple MCS need the same number of RU for a given MPDU size, the table is optimised by discarding the less robust combinations Secondly, the MCS are used in an adaptive modulation and coding scheme (AMC) that can be used with groups of terminals in a group resource allocation (GRA) scheme This allows multiple groups to be formed within a single frame, each of which has a set of shared parameters (eg MCS) Multiple groups can have the same parameter sets Thirdly, the AMC uses channel quality information (CQI) reports Hierarchical reporting about different nodes/sub-carrier groups can be used in combination with reporting the CQI of best-m sub-carriers Terminals may move between GRA groups dependent upon CQI information, or groups may move to different sub-carriers