| Patent application number | Description | Published |
|---|
| 20110041027 | METHODS AND SYSTEMS FOR HARQ PROTOCOLS - Methods described herein are for wireless communication systems. One aspect of the invention is directed to a method for a HARQ process, in which the HARQ process includes a first transmission of an encoder packet and at least one retransmission. The method involves allocating a transmission resource for each respective transmission. The method involves transmitting control information from a base station to a mobile station for each respective transmission. The control information includes information to uniquely identify the HARQ process and an identification of one of a time resource, a frequency resource and a time and frequency resource that is allocated for the transmission. In some embodiments of the invention, specific control information is signalled from a base station to a mobile station to enable RAS-HARQ operation. In some embodiments of the invention, retransmission signaling in included as part of regular unicast signaling used for both first transmission and retransmissions. In some embodiments of the invention, a 3-state acknowledgement channel and associated error recovery operation enables the base station and mobile station to recover from control signaling error and reduce packet loss. | 02-17-2011 |
| 20110051835 | UPLINK MIMO TRANSMISSION FROM MOBILE COMMUNICATIONS DEVICES - A method of uplink transmission from a mobile device having multiple antennas to a base station having multiple antennas includes transmitting in an open-loop single-user MIMO mode when the mobile device is at high speed, transmitting in a closed-loop single-user MIMO mode when the mobile device is at low speed, and, upon request, transmitting in a multi-user collaborative MIMO mode. The method also includes controlling uplink transmissions in a selected one of the open-loop single-user MIMO, the closed-loop single-user MIMO and the multi-user collaborative MIMO modes. Uplink transmissions from the mobile device may be transmitted using multiple antennas of the mobile device. Upon request, the mobile device may switch to transmitting in multi-user collaborative MIMO mode with a subset of the multiple antennas. | 03-03-2011 |
| 20110122811 | Codebook restructure, differential encoding/decoding and scheduling - A method and apparatus for feedback of channel information characterizing a wireless transmission between a base station and a mobile station. The method involves, at the base station, locating in a codebook of predetermined channel responses a predetermined channel response identified by: a primary identifier identifying a cluster associated with a channel response generated by a mobile station; and a differential identifier identifying channel response member within the cluster identified by the primary identifier. The predetermined channel responses are grouped in a plurality of clusters in accordance with a correlation criterion, each cluster including a plurality of predetermined channel response members. The method also involves generating a control signal for controlling transmissions to the mobile station in accordance with the located predetermined channel response. A method and apparatus for feedback of channel information characterizing a wireless transmission between a mobile station and a base station are also disclosed. | 05-26-2011 |
| 20110122846 | UPLINK CONTROL SIGNAL DESIGN FOR WIRELESS SYSTEM - Transmission of uplink control message for a wireless system. The uplink control message may be encoded according to one of multiple possible schemes. The choice of encoding scheme may be made based on the control message size and/or based on the available transmission resources and/or based on the detection scheme used on the receiving end. A modulation scheme may also be selected based on such factors. CDM may be used for certain control messages. Block code encoding, such as Reed-Muller encoding may be used for certain control messages. Different transmission resources may be allocated for different control message uses. The encoding specifics may be selected to obtain a certain hamming distance and/or size of the encoded message or based on other factors. | 05-26-2011 |
| 20110122963 | CODEBOOK RESTRUCTURE, DIFFERENTIAL ENCODING/DECODING, AND SCHEDULING - There is disclosed a method for feedback of channel information characterizing a wireless transmission between a base station and a mobile station over a communications channel. The method involves: receiving a primary identifier identifying a cluster associated with a channel response generated by a mobile station; receiving a differential identifier identifying channel response member within the cluster identified by the primary identifier; locating in a codebook of predetermined channel responses a predetermined channel response identified by said primary identifier and said differential identifier, the predetermined channel responses in the codebook being grouped in a plurality of clusters in accordance with a correlation criterion, each cluster including a plurality of predetermined channel response members; and generating a control signal for controlling transmissions to the mobile station in accordance with said located predetermined channel response. | 05-26-2011 |
| 20110128871 | Optimizing downlink communications between a base station and a remote terminal by power sharing - A method of optimizing downlink communications between a base station and mobile stations in a wireless communication system involves: identifying users that have a modulation control scheme (MCS) power value greater than a reference power value as high power users; for each of the high power users, calculating a power difference being a difference between a geometry value associated with each of the high power users and a reference geometry value associated with the reference power value respectively; summing the power differences in a power pool; identifying users that have an MCS power value below the reference power value as low power users; associating increased geometry values with at least some of the low power users while depleting the power pool by corresponding amounts until the power pool is depleted; and determining new MCSs for at least some of the low power users based on the increased geometry values. | 06-02-2011 |
| 20110130165 | METHODS OF POWER SHARING FOR DL CONTROL TRANSMISSION - A method of optimizing downlink communications between a base station and mobile stations in a wireless communication system involves: identifying users that have a modulation control scheme (MCS) power value greater than a reference power value as high power users; for each of the high power users, calculating a power difference being a difference between a geometry value associated with each of the high power users and a reference geometry value associated with the reference power value respectively; summing the power differences in a power pool; identifying users that have an MCS power value below the reference power value as low power users; associating increased geometry values with at least some of the low power users while depleting the power pool by corresponding amounts until the power pool is depleted; and determining new MCSs for at least some of the low power users based on the increased geometry values. | 06-02-2011 |
| 20110149846 | UPLINK CONTROL SIGNAL DESIGN FOR WIRELESS SYSTEM - Transmission of uplink control message for a wireless system. The uplink control message may be encoded according to one of multiple possible schemes. The choice of encoding scheme may be made based on the control message size and/or based on the available transmission resources and/or based on the detection scheme used on the receiving end. A modulation scheme may also be selected based on such factors. CDM may be used for certain control messages. Block code encoding, such as Reed-Muller encoding may be used for certain control messages. Different transmission resources may be allocated for different control message uses. The encoding specifics may be selected to obtain a certain hamming distance and/or size of the encoded message or based on other factors. | 06-23-2011 |
