Patent application number | Description | Published |
20090125363 | Method, apparatus and computer program for employing a frame structure in wireless communication - A frame structure for scheduling radio resources includes a first time slot, followed by a plurality of other time slots each having either a second length, or a first length that is approximately double the second length. Transmissions are sent in downlink ones of the other time slots and received in uplink ones of the other timeslots. In various embodiments, the first length is 1.35 ms/19 symbols and the second length is 0.675 ms/9 symbols; the first timeslot is downlink and has length 0.852 ms/12 symbols; there is an additional guard period of 26 microseconds between the first timeslot and the other timeslot that follows the first timeslot which is uplink and has the first length; there may also be a single symbol between the guard period and that uplink timeslot for uplink signaling; and all other timeslots that are downlink are of the second length. | 05-14-2009 |
20090129317 | ACK/NACK DTX detection - In a first aspect of the invention there is a method, apparatus, and executable software product for receiving scheduling information, determining that at least one downlink allocation of the scheduling information was not received, sending a reply to the received scheduling that comprises an indication of discontinuous transmission in response to the determining. In another aspect of the invention there is a method an apparatus to send scheduling information, and receive a reply to the scheduling information comprising an indication of discontinuous transmission that at least one downlink allocation of the scheduling information was not received. | 05-21-2009 |
20090303896 | METHOD AND APPARATUS FOR PROVIDING RANDOM ACCESS WINDOW CONFIGURATION - An approach is provided for providing random access window configuration by estimating a processing time margin for processing random access preambles received in one or more random access channels. The estimated processing time margin is then used to offset the respective random access window configuration. | 12-10-2009 |
20090323613 | Selecting between normal and virtual dual layer ACK/NACK - An allocation of downlink resources is received, which are monitored on I layers for data. A resource-specific bit (ACK/NACK) is generated for each of those resources. From a pattern of those resources is selected an algorithm from among a first algorithm that bundles them in a first mode and a second algorithm that bundles them in a second mode. The selected algorithm is used on the generated resource-specific bits that correspond to the downlink resources, bundled according to the selected mode, to generate I reply bits which are then transmitted. At the network side a NACK reply bit is received, based on a pattern of the allocated downlink resources, a first algorithm that bundles them in a first mode or a second algorithm that bundles them in a second mode is selected. A bundling window and layer combination are determined from the selected algorithm, which gives the resource for retransmitting the NACK'd data. | 12-31-2009 |
20100050034 | SOFT BUTTER MEMORY CONFIGURATION IN A COMMUNICATION SYSTEM - In accordance with an embodiment of the present invention, an apparatus, comprising a processor configured to determine a total number of soft channel bits, a first number associated with hybrid automatic retransmit request processes and a second number associated with hybrid automatic retransmit request processes; and the processor further configured to select a size of a soft buffer memory partition based at least in part on the total number of soft channel bits, the first number associated with hybrid automatic retransmit request processes and the second number associated with hybrid automatic retransmit request processes, is disclosed. | 02-25-2010 |
20100110917 | Method, Apparatus and Computer Program Product For Adaptive Reference Symbol Placement - A method, apparatus and computer program product are provided that determine the length of an idle period, such as the idle period preceding a DL-to-UL switch point, and then insert a symbol including reference signal(s) (RS) at a position within a downlink slot that varies based upon the length of the idle period. A method, apparatus and computer program product are also provided according to another aspect that determine the length of an idle period, receive a plurality of symbols within a downlink slot and then recognize a symbol including RS at a position within the downlink slot that varies based upon the length of the idle period. Accordingly, the method, apparatus and computer program product permit the position of the symbol including RS within a downlink slot to be varied while still providing the reference signals that are required in order to permit accurate recovery of the data. | 05-06-2010 |
20100150081 | PHYSICAL UPLING CONTROL CHANNEL COMPRESSION SUPPORTING ACK/NACK BUNDLING - In one exemplary embodiment, a method includes: dividing a plurality of control channel elements in at least one downlink subframe of a bundling window into a plurality of portions having a first portion and a second portion, where the first portion includes at least one control channel element that is mapped to resources and the second portion includes at least one control channel element that is not mapped to resources, where the bundling window has a plurality of downlink subframes; and sending a last downlink grant in a downlink subframe of the bundling window using at least one control channel element that is mapped to resources. | 06-17-2010 |
20100150114 | APPARATUS AND METHOD TO ALLOCATE COMMUNICATION RESOURCES FOR AN APERIODIC DATA PACKET IN A COMMUNICATION SYSTEM - Apparatus and methods for allocating communication resources for an aperiodic data packet in a communication system. A transmission time interval for an aperiodic data packet including a channel quality indicator report is allocated during at least one of a first transmission time interval and a second transmission time interval in an uplink scheduling window in accordance with an uplink scheduling grant by a network entity, and a message is assembled including said aperiodic data packet for transmission to said network entity during said at least one of said first transmission time interval and said second transmission time interval. | 06-17-2010 |
20100214972 | METHODS AND APPARATUSES FOR TRANSMITTING DOWNLINK CONTROL SIGNALING ON WIRELESS RELAY LINK - In accordance with an example embodiment of the present invention, a method comprises allocating a control channel resource in a wireless relay transmission frame on a wireless relay link; generating a control signaling based on at least one of a resource allocation scheme, a status of the wireless relay link and a traffic condition of the wireless relay link; mapping the control signaling to the allocated control channel resource via at least one of a time-first mapping, a frequency-first mapping, and a multiplexing mapping; and transmitting the control signaling in the allocated control channel resource on the wireless relay link to at least one associated relay node. | 08-26-2010 |
20100322099 | PC ARRANGEMENT FOR LTE TDD SYSTEM - Embodiments of the present invention provide methods, systems and apparatuses for optimizing downlink path loss (PL) measurements in time division duplex (TDD) systems enabling fast power control targeting to decrease fading margin. In one embodiment, a method of power control in a long term evolution time division duplex (TDD) system is provided. The method includes controlling a length of a path loss measurement filter based on an allocation type. A width and frequency position of the path loss measurement filter is made dependent on the allocation type. | 12-23-2010 |
20110010598 | User Specific Load Balancing - In accordance with exemplary embodiments of the invention there is a method and apparatus to detect with a hybrid automatic repeat request function a collision between an uplink packet re-transmission and a new uplink packet transmission within a hybrid automatic repeat request process, and in response, to dynamically allocating resources for transmitting the new uplink packet transmission in a different hybrid automatic repeat request process that does not collide with the uplink packet re-transmission. In accordance with other exemplary embodiments of the invention, there is a method and apparatus to transmit a packet re-transmission in a hybrid automatic repeat request process using a semi-persistently scheduled uplink resource, and responsive to receiving a dynamic allocation of a different hybrid automatic repeat request process, to transmit a new packet using the dynamically allocated different hybrid automatic repeat request process. | 01-13-2011 |
20110038310 | INITIALIZATION OF REFERENCE SIGNAL SCRAMBLING - A scrambling sequence is initialized using at least a cell identifier and an offset, and a physical downlink control information DCI is sent to a user equipment which indicates the offset. In more particular embodiments a user equipment-specific reference signal UE-RS is scrambled using the initialized scrambling sequence, and the scrambled UE-RS is sent to the UE for demodulating a downlink shared channel (PDSCH). In another exemplary embodiment the generated UE-RS is sent in a pilot part of a subframe transmission associated with the PDSCH and is for demodulating at least a data part of that subframe transmission. In a specific embodiment from the UE side, the UE receives the UE-RS and the DCI which indicates the offset, descrambles the UE-RS using a scrambling sequence that is initialized using a cell identifier and the indicated offset; and demodulates the PDSCH using the de-scrambled UE-RS. | 02-17-2011 |
20110141878 | ACK/NACK TRANSMISSION ON PUCCH IN LTE-ATDD WITH NXPDCCH STRUCTURE - Systems and methods are provided for enabling different “bundling” methods for downlink transmissions and provide different interpretations of the acknowledgement/negative-acknowledgement bit. A user equipment is configured so that it commonly acknowledges all downlink transmission time intervals within a bundle so that if one packet is determined to be erroneous, all packets in that bundle will be retransmitted. Additionally, the systems and methods are implemented by allowing an interpretation to be applied to the uplink acknowledgement/negative-acknowledgement field such that the user equipment is able to divide bundled downlink packets into smaller windows in Long Term Evolution (LTE) Release 8 time division duplex (TDD) mode. In LTE Advanced (LTE-A) TDD mode, various embodiments provide bundling within the time domain, within the frequency domain, and within a hybrid time-frequency domain. Furthermore, enhanced channel selection methods are also provided in support of the above-mentioned bundling methods in accordance with various embodiments. | 06-16-2011 |
20110142075 | Control Channel Signaling For Multiple ACK/NACK Assignments - A method to control channel signaling between elements in a wireless network (e.g., a UE and a network node) is described. The method includes making a first assignment by assigning a first resource to a UE for single AN signaling. Making a second assignment by assigning a second resource to the UE for multi-bit AN signaling in conjunction with the single AN signaling is also included in the method. A resource block reserved for sending dynamic AN feedback includes the first resource and the second resource. The method includes providing (e.g., via a transmitter) an indication of the first assignment and the second assignment Apparatus and computer readable media are also described. | 06-16-2011 |
20110211503 | DYNAMIC ALLOCATION OF SUBFRAME SCHEDULING FOR TIME DIVISON DUPLEX OPERATION IN A PACKET-BASED WIRELESS COMMUNICATION SYSTEM - Systems and methods for enabling the dynamic allocation of certain sub frames as downlink or uplink resources in a time division duplexed over the air communications system. A base station or eNB may allocate certain subframes within a repeating radio frame of a TDD configuration as either DL or UL subframes for communicating to user equipment or UE devices to increase efficient use of system resources based on the data to be transmitted. Methods for determining the capabilities of a selected UE and based on the determining step, dynamically allocating certain subframes are disclosed. The methods and systems are compatible with user equipment that does not support the dynamic allocation of subframes. | 09-01-2011 |
20110268053 | PHYSICAL UPLINK CONTROL CHANNEL ACK/NACK INDEXING - A method for controlling channel signaling between a UE and a wireless network access node is described. The method includes determining whether an examined sub-frame of a plurality of sub-frames in a first resource region is unused. The index of the examined sub-frame is a last index of the plurality of sub-frames allocated for use in a first channel. The plurality of sub-frames is organized in a reverse indexing manner such that a last indexed sub-frame is adjacent to a second resource region. The second resource region is allocated to a second channel. In response to determining that the w examined sub-frame is unused, the examined sub-frame is re-allocated for temporary use in the second channel. The method also includes providing an indication of the allocation. Apparatus and computer readable media are also described. | 11-03-2011 |
20120093097 | OPTIMIZED UPLINK CONTROL SIGNALING FOR EXTENDED BANDWIDTH - According to an embodiment a user equipment UE transmits uplink control signals using one or more chunks of uplink frequency spectrum that contain a simultaneous uplink shared channel; and for the case where there is no simultaneous uplink shared channel available, the UE transmits uplink control signals using only a single chunk of uplink frequency spectrum. In various embodiments the control signals are ACK/NACK control signals transmitted on an uplink control channel, the uplink shared channel comprises a chunk-specific uplink control channel, and each chunk comprises a component carrier of a LTE-A system. Downlink assignment index bits may be included in a downlink grant to the UE which indicates how many chunks in total are allocated in a current downlink subframe. The UE can also use ACK/NACK control signal bundling over chunks in addition to either or both of chunk- specific ACK/NACK control signals or ACK/NAK control signal multiplexing. | 04-19-2012 |
20120106569 | Apparatus, Method and Article of Manufacture - There is provided a method including performing frequency domain acknowledgement/negative acknowledgement (ACK/NAK) bundling across component carriers within a user equipment reception bandwidth; generating a bundled ACK/NAK value corresponding to at least one code word on the basis of the performed ACK/NAK bundling; and including information relating to the generated bundled ACK/NAK value and the number of detected downlink grants within the user equipment reception bandwidth in an ACK/NAK resource to be transmitted on an uplink control channel. | 05-03-2012 |
20120329468 | Mapping Reference Signal for Multi-Cell Transmission - Described is a method for the mapping of reference signals. The method includes generating a reference signal sequence for two or more cells, where each cell of the two or more cells has a cell bandwidth. The method also includes determining an offset for the reference signal sequence based at least in part on the cell bandwidth of each cell. Mapping the reference signal sequence to resource elements of physical resource blocks for the cells based at least in part on the offset is included in the method. Apparatus and computer readable media are also disclosed. | 12-27-2012 |
20130136024 | POWER CONTROL ARRANGEMENT FOR LONG TERM EVOLUTION TIME DIVISION DUPLEX METHOD AND APPARATUS - Embodiments of the present invention provide methods, systems and apparatuses for optimizing downlink path loss (PL) measurements in time division duplex (TDD) systems enabling fast power control targeting to decrease fading margin. In one embodiment, a method of power control in a long term evolution time division duplex (TDD) system is provided. The method includes controlling a length of a path loss measurement filter based on an allocation type. A width and frequency position of the path loss measurement filter is made dependent on the allocation type. | 05-30-2013 |
20130163546 | SELECTING BETWEEN NORMAL AND VIRTUAL DUAL LAYER ACK/NACK - An allocation of downlink resources is received, which are monitored on l layers for data. A resource-specific bit (ACK/NACK) is generated for each of those resources. From a pattern of those resources is selected an algorithm from among a first algorithm that bundles them in a first mode and a second algorithm that bundles them in a second mode. The selected algorithm is used on the generated resource-specific bits that correspond to the downlink resources, bundled according to the selected mode, to generate l reply bits which are then transmitted. At the network side a NACK reply bit is received, based on a pattern of the allocated downlink resources, a first algorithm that bundles them in a first mode or a second algorithm that bundles them in a second mode is selected. A bundling window and layer combination are determined from the selected algorithm, which gives the resource for retransmitting the NACK'd data. | 06-27-2013 |
20140362707 | Selecting Between Normal And Virtual Dual Layer ACK/NACK - An allocation of downlink resources is received, which are monitored on I layers for data. A resource-specific bit (ACK/NACK) is generated for each of those resources. From a pattern of those resources is selected an algorithm from among a first algorithm that bundles them in a first mode and a second algorithm that bundles them in a second mode. The selected algorithm is used on the generated resource-specific bits that correspond to the downlink resources, bundled according to the selected mode, to generate I reply bits which are then transmitted. At the network side a NACK reply bit is received, based on a pattern of the allocated downlink resources, a first algorithm that bundles them in a first mode or a second algorithm that bundles them in a second mode is selected. A bundling window and layer combination are determined from the selected algorithm, which gives the resource for retransmitting the NACK'd data. | 12-11-2014 |