| Patent application number | Description | Published |
|---|
| 20080267161 | SIGNALING OF RANDOM ACCESS PREAMBLE TIME-FREQUENCY LOCATION IN WIRELESS NETWORKS - Embodiments of the present disclosure provide a base station sub-system, a method of allocating random access configurations and a method of downlink signaling of random access configurations. In one embodiment, the base station sub-system is for use in a wireless communication system and includes an allocator configured to allocate random access configurations having a plurality of time slots that use a single frequency resource. Additionally, the base station sub-system also includes a transmitter configured to signal at least one index of the random access configurations and a random access receiver balancing in time the processing load of the random access detection of different cells served by the base station. | 10-30-2008 |
| 20080316961 | Signaling of Random Access Preamble Parameters in Wireless Networks - User equipment (UE)-initiated accesses within a cellular network are optimized to account for cell size and to reduce signaling overhead. A fixed set of preamble parameter configurations for use across a complete range of cell sizes within the cellular network is established and stored within each UE. A UE located in a given cell receives a configuration number transmitted from a nodeB serving the cell, the configuration number being indicative of a size of the cell. The UE selects a preamble parameter configuration from the fixed set of preamble parameter configurations in response to the received configuration number and then transmits a preamble from the UE to the nodeB using the preamble parameter configuration indicated by the configuration number. | 12-25-2008 |
| 20090040918 | Random Access Preamble Detection for Long Term Evolution Wireless Networks - This invention is a method for preamble detection with estimation of UE timing advance (TA) and channel quality information (CQI) which uses a sliding window to detect the preamble and estimate user timing advance and channel quality information. The window length is set to the cyclic prefix length of data transmission. A preamble detection threshold is computed semi-analytically according to noise sample statistics. | 02-12-2009 |
| 20090040919 | Transmission Using Nested OFDMA - A transmission of information within a wireless cellular network may include a first and second group of samples. A first group of samples is created comprising at least a first and a last subgroup, wherein the last subgroup is same as the first subgroup. A second group of samples created. A transformed set of samples produced by jointly transforming the created first and second group with a discrete Fourier transform (DFT). The transformed set of samples is expanded to produce an expanded set, and the expanded set is transformed with an inverse discrete Fourier transform (IDFT) to produce an OFDM symbol with a fractional payload. The first group of samples is a reference signal (RS), which is known to the receiver before the transmission occurs, while the second group of samples is information data. | 02-12-2009 |
| 20090046629 | Signaling of Random Access Preamble Sequences in Wireless Networks - Transmission of random access preamble structures within a cellular wireless network is based on the use of cyclic shifted constant amplitude zero autocorrelation (“CAZAC”) sequences to generate the random access preamble signal. A pre-defined set of sequences is arranged in a specific order. Within the predefined set of sequences is an ordered group of sequences that is a proper subset of the pre-defined set of sequences. Within a given cell, up to 64 sequences may need to be signaled. In order to minimize the associated overhead due to signaling multiple sequences, only one logical index is transmitted by a base station serving the cell and a user equipment within the cell derives the subsequent indexes according to the pre-defined ordering. Each sequence has a unique logical index. The ordering of sequences is identified by the logical indexes of the sequences, with each logical index uniquely mapped to a generating index. When a UE needs to transmit, it produces a second sequence using the received indication of the logical index of the first sequence and an auxiliary parameter and then produces a transmission signal by modulating the second sequence. | 02-19-2009 |
| 20090073944 | Restricted Cyclic Shift Configuration for Random Access Preambles in Wireless Networks - Transmission of random access preamble structures within a cellular wireless network is based on the use of cyclic shifted constant amplitude zero autocorrelation (“CAZAC”) sequences to generate the random access preamble signal. A pre-defined set of sequences is arranged in a specific order. Within the predefined set of sequences is an ordered group of sequences that is a proper subset of the pre-defined set of sequences. Within a given cell, up to 64 sequences may need to be signaled. In order to minimize the associated overhead due to signaling multiple sequences, only one logical index is transmitted by a base station serving the cell and a user equipment within the cell derives the subsequent indexes according to the pre-defined ordering. Each sequence has a unique logical index. The ordering of sequences is identified by the logical indexes of the sequences, with each logical index uniquely mapped to a generating index. When a UE needs to transmit, it produces a second sequence using the received indication of the logical index of the first sequence and an auxiliary value and then produces a transmission signal by modulating the second sequence. The auxiliary value is selected from one of two sets based on a set indicator broadcast by the eNB | 03-19-2009 |
| 20090109908 | Transmission of Sounding Reference Signal and Scheduling Request in Single Carrier Systems - A transmission of information from a secondary to a primary node occurs in a plurality of transmission instances which are logical time durations. A secondary node receives an allocation of periodic transmission instances for a scheduling request indicator (SRI) and an allocation if periodic transmission instances for a sounding reference signal (SRS). In a particular transmission instance allocated for the transmission of both SRS and SRI, the secondary node transmits the SRI without transmitting the SRS if the SRI indicates a pending scheduling request; otherwise, the secondary node transmits the SRS without transmitting the SRI. | 04-30-2009 |
| 20090207797 | Mapping between Logical and Physical Uplink Control Resource Blocks in Wireless Networks - A transmission of information from a secondary to a primary node occurs in a plurality of N logical time durations on an uplink channel in a wireless network. A scheme for mapping between logical uplink control channel (PUCCH) resource blocks (RBs) and physical RBs (PRBs) used by PUCCH is described. A logical uplink control resource block index n | 08-20-2009 |
| 20090213769 | Transmission of Bundled Feedback in Wireless Networks - A transmission of information between a secondary to a primary node in a wireless network occurs in a plurality of N logical time durations. Bundled feedback information for multiple DL transmissions is provided in one UL transmission. Each DL transmission is indicated by a DL grant comprising an M-bit downlink assignment indicator (DAI) field. The primary node increments the value of the M-bit DAI field in successively transmitted DL grants. The secondary node examines the value of the M-bit DAI field in received DL grants, to determine the bundled feedback information. | 08-27-2009 |
| 20090239568 | SCHEDULING REQUEST USAGE IN DRX MODE IN WIRELESS NETWORKS - A cell within cellular network includes user equipment (UE) that transmits data to a base station (eNB). When a UE does not have data to transmit, it may enter a low power mode (DRX) having silent intervals during which the eNB does not expect to receive a transmission from the UE and the UE is not required to monitor DL control channels from the eNB. While in DRX mode, the UE may detect an event, such as data ready for transmission or a need to request a timing adjustment (TA) update. The UE transmits a scheduling request indicator (SRI) to the eNB in response to detection of the event, wherein the SRI carries information identifying the triggering event. | 09-24-2009 |
| 20100309775 | Transmission Using Nested OFDMA - A transmission of information within a wireless cellular network may include a first and second group of samples. A first group of samples is created comprising at least a first and a last subgroup, wherein the last subgroup is same as the first subgroup. A second group of samples created. A transformed set of samples produced by jointly transforming the created first and second group with a discrete Fourier transform (DFT). The transformed set of samples is expanded to produce an expanded set, and the expanded set is transformed with an inverse discrete Fourier transform (IDFT) to produce an OFDM symbol with a fractional payload. The first group of samples is a reference signal (RS), which is known to the receiver before the transmission occurs, while the second group of samples is information data. | 12-09-2010 |
