Patent application number | Description | Published |
20120014425 | METHOD AND APPARATUS FOR DETERMINING UE MOBILITY STATUS - A radio user equipment (UE) mobility status is determined in a communications node. UE mobility status measurements associated with the UE communicating over a radio channel are performed. The UE mobility status corresponds to a degree of variation of the radio channel over time. Channel characteristics of the radio channel at a first time and at a second later time are determined. Based on the determined channel characteristics, a channel characteristic error metric is determined and compared to a predetermined threshold. The UE mobility status is determined based on one or more iterations of the threshold comparison. | 01-19-2012 |
20120026985 | Method and Apparatus for Grant Loss Detection and Related Processing in a Wireless Communication Network - The present invention provides a method and apparatus for improving wireless communication network performance and efficiency, based on detecting the occurrence of grant loss in relation to the transmission of scheduling grants to mobile terminals over a downlink control channel. Grant loss detection is based on detecting erasure events corresponding to the transmitted scheduling grants, and the incidence of grant loss with respect to a given mobile terminal can be tracked and used to compensate the control value(s) used for link adaptation of the downlink control channel, with respect to that terminal. Additionally, or alternatively, when a given grant is determined to be lost, a new grant is sent and the HARQ redundancy version is reset for the newly scheduled transmission. | 02-02-2012 |
20120170479 | Allocation of Acknowledgement Channels to Channel Groups Having Fixed Transmit Energies - A method and apparatus is provided for assigning resources for an acknowledgement channel, such as the PHICH in LTE systems. A list of acknowledgement channels for a group of scheduled mobile terminals is generated. The list is sorted in descended order of the required transmit energies for the corresponding mobile terminals. The acknowledgement channels are then assigned to channel groups one at a time in sorted order to an available channel group with the lowest cumulative transmit energy. By sorting the channel list before assigning resources, the variance in the transmit energies for different channel groups is reduced. Given enough number of acknowledgement channel groups, the small variance in the transmit energies for different channel groups implies improved error rate performance. | 07-05-2012 |
20130155852 | Systems and Methods for Resource Booking for Admission Control and Scheduling Using DRX - Systems and methods provide for performing admission control in a communications network. The method includes: receiving a request for an entity or service for admission to the communications network; calculating resources, wherein the step of calculating resources includes: estimating a first future resource use for current entities and services in the communications network; and estimating a second future resource use for the entity or service received in the request; determining admission to the communications network of the received request based at least in part on the step of calculating resources; and using a partitionable booking window, if admission is allowed for the received request, for booking the first and second future resource uses based at least in part on the step of calculating resources. | 06-20-2013 |
20130170469 | Methods and Apparatus for Link Adaptation for Single User and Multi-User Mimo - Methods of performing link adaptation in a wireless communication system for simultaneous transmission of codewords include selecting initial modulation and coding scheme (MCS) levels for the codewords, estimating a size ratio of the codewords, determining a number of scheduling blocks (SB) for the codewords with the initial MCS levels, and determining revised MCS levels for the codewords in response to the determined number of SBs. Transport block sizes are computed for the codewords, and it is determined if there is a need to increase the number of scheduling blocks in at least one of the codewords. If there is a need to increase the number of scheduling blocks in a codeword, scheduling blocks are added to the codeword, and the transport block size for the codeword is recomputed. The codewords are then simultaneously transmitted over different multiple input-multiple output (MIMO) communication channels using the same time and frequency resources. | 07-04-2013 |
20130343290 | TABLE BASED LINK ADAPTION FOR WIRELESS COMMUNICATION TRANSMISSIONS WITH ONE CODEWORD - A radio resource management method is provided. Data for transmission is stored. The stored data is associated with user equipment (UE). A channel quality is estimated. A first modulation and coding scheme (MCS) is determined based at least in part on the estimated channel quality. A first number of scheduling blocks (SBs) required to transmit the stored data is determined based at least in part on the first MCS. The first number of SBs are a minimum of an initial number of SBs and available amount of SBs. A link quality is calculated based at least in part on a channel condition associated with the first number of SBs. A second MCS is determined based at least in part on the calculated link quality and a link quality requirement. | 12-26-2013 |
20140133317 | ADAPTIVE TRANSMISSION MODE SWITCHING | 05-15-2014 |
20150117321 | OUTER-LOOP ADJUSTMENT FOR WIRELESS COMMUNICATION LINK ADAPTATION - A method and base station for adjusting outer-loop adjustment values used for link adaptation in a wireless communication network is provided. A modulation of a user equipment is determined and a success or failure of a Transport Block (TB) based on a TB feedback message is determined. Based on the TB feedback, one of an acknowledgement counter and a non-acknowledgement counter is incremented corresponding to the determined modulation. An upward step size for the determined modulation is updated based on the respective acknowledgement counter and the non-acknowledgement counter to affect link adaption. | 04-30-2015 |