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 |
20110261781 | METHOD AND SYSTEM FOR PROVIDING AN UPLINK STRUCTURE AND MINIMIZING PILOT SIGNAL OVERHEAD IN A WIRELESS COMMUNICATION NETWORK - A method and system are provided having an uplink control structure and a pilot signal having minimal signal overhead for providing channel estimation and data demodulation in a wireless communication network. The uplink control structures enable mobile terminals to communicate with corresponding base stations to perform various functions including obtaining initial system access, submitting a bandwidth request, triggering a continuation of negotiated service, or providing a proposed allocation re-configuration header. A dedicated random access channel is provided to communicatively couple the base station and the mobile terminal so that the mobile terminal can select a random access signaling identification. A resource request is received at the base station to uplink resource information from the mobile terminal and an initial access information request is received from the mobile terminal to configure the base station connection. Pilot signals with varying density configurations are provided to include low density symbol patterns for multiple contiguous resource blocks and high density symbol patterns for single resource blocks. | 10-27-2011 |
20120039290 | METHOD AND SYSTEM FOR PROVIDING AN UPLINK STRUCTURE AND IMPROVED CHANNELIZATION SCHEME IN A WIRELESS COMMUNICATION NETWORK - A method and system are provided to perform channelization in a wireless communication network, wherein the wireless communication network including at least one base station that is communicatively coupled to at least one mobile terminal. A bandwidth of the wireless communication network is divided into a plurality of zones at the base station. Resource blocks are provided at the base station to receive data symbols transmitted in the wireless communication network. A plurality of resource blocks are combined at the base station to form a physical basic channel unit which are allocated to one of the plurality of zones at the base station. A permutation is performed on the physical basic channel unit to form a logical basic channel unit. A channel is provided to communicatively couple the base station and the mobile terminal so that the mobile terminal may send an access grant message and a user identification to the base station to transmit data in the logical basic channel unit. | 02-16-2012 |
20130010748 | SYSTEMS AND METHODS FOR UPLINK SIGNALLING - Methods, base stations and access terminals for uplink signalling are provided. Resource request channel characteristics such as location in time-frequency, sequence, time slot, are assigned to each access terminal to distinguish their resource requests from the resource requests of other access terminals. Access terminals make requests using a resource request on a resource request channel having the assigned characteristics. The base station can then determine which access terminal transmitted 0 the resource request based on the resource request channel characteristics of the resource request channel upon which the resource>request was received. The base station then transmits a response to the request which may for example be a new resource allocation, a default allocation or a renewal of a previous allocation. | 01-10-2013 |
20130010891 | Systems and Methods for Network MIMO - Multiple-Input Multiple-Output (MIMO) systems and methods are provided for enabling network MIMO among base stations (BSs) and a mobile station (MS). A BS configure a network MIMO zone based on an indication of at least one other BS eligible for network MIMO. The network MIMO zone is defined by resources having at least time and frequency dimensions allocated for master transmission under control of the BS, or slave transmission under control of the other BS eligible for network MIMO. The BS can transmit data on the network MIMO zone to the MS. Where there is no data to transmit to the MS, the BS may transmit data on the network MIMO zone to another MS. To configure the network MIMO zone, the BS may look up in a table combinations of the eligible BSs associated with the indication. | 01-10-2013 |
20130016680 | Systems and Methods for Multi-User MIMO - Methods and apparatus are described for implementing multiple user, multiple input, multiple output (MU-MIMO) communications involving the use of beamforming where signals transmitted from a transmitter are received at multiple receivers. The method includes schemes for the calculation of interference implemented at the transmitting end, and in some embodiments receiving ends, of the channel. | 01-17-2013 |
20130294421 | Systems and Methods for Network MIMO - A multiple-input, multiple-output (MIMO) communication system comprising a master base station and a slave base station. The master base station has a plurality of transmit antennas and transmits a first set of data to a mobile station in a first transmission. The slave base station has a plurality of transmit antennas and transmits a second set of data to the mobile station in the first transmission. The master base station retransmits the second set of data to the mobile station during a first retransmission and the slave base station retransmits the first set of data to the mobile station during the first retransmission. | 11-07-2013 |
20140050140 | 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. Other aspects of the invention are directed to acknowledging a downlink HARQ transmission, rescheduling an uplink HARQ transmission, and error recovery for an uplink HARQ transmission. | 02-20-2014 |
20140161068 | Method and System for Providing an Uplink Structure and Minimizing Pilot Signal Overhead in a Wireless Communication Network - A method and system are provided having an uplink control structure and a pilot signal having minimal signal overhead for providing channel estimation and data demodulation in a wireless communication network. The uplink control structures enable mobile terminals to communicate with corresponding base stations to perform various functions including obtaining initial system access, submitting a bandwidth request, triggering a continuation of negotiated service, or providing a proposed allocation re-configuration header. A dedicated random access channel is provided to communicatively couple the base station and the mobile terminal so that the mobile terminal can select a random access signaling identification. A resource request is received at the base station to uplink resource information from the mobile terminal and an initial access information request is received from the mobile terminal to configure the base station connection. Pilot signals with varying density configurations are provided to include low density symbol patterns for multiple contiguous resource blocks and high density symbol patterns for single resource blocks. | 06-12-2014 |
20140211879 | UPLINK MIMO TRANSMISSION FROM MOBILE COMMUNICATIONS DEVICES - 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 multiuser 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. | 07-31-2014 |
20150049723 | 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. | 02-19-2015 |