Abstract:
A method and apparatus for managing network resources in a location based multiple access (LOMA) radio access network is provided. The method includes receiving traffic data and signal-to-noise (SNR) data from one or more LOMA wireless entities associated with the LOMA RAN, generating training data based on the received traffic data and SNR data and storing the training data, generating or updating a multi-layer LOMA map based on the training data, the multi-layer LOMA map including multiple layers, each layer including one or more LOMA zones, and each LOMA zone in an upper layer of the multi-layer LOMA map associated with one or more LOMA zones in a lower layer of the multi-layer LOMA map and transmitting the generated or updated multi-layer LOMA map to the one or more LOMA wireless entities. There is also provided methods for downlink and uplink data transmissions enabled by a multi-layer LOMA map.
Abstract:
Methods and apparatuses for performing MIMO transmissions are described. Retransmission schemes are described for MIMO transmissions. In an example, a transmitter node obtains a plurality of packets to be transmitted to an intended receiver node over a plurality of MIMO layers. A set of one or more cross-block check blocks is generated, where the set of one or more cross-block check blocks being is using a plurality of bits selected from across two or more packets to be transmitted over respective two or more MIMO layers. The set of one or more cross-block check blocks is transmitted over one or more MIMO layers.
Abstract:
A method for determining synchronization of uplink timing in a machine type communication (MTC) system comprising a machine type communication device (MTCD) and a network element is disclosed that takes advantage of the MTCD being at a fixed location relative to the network element. The method includes receiving at the MTCD an uplink timing adjustment value from the network element and storing the uplink timing adjustment value at the MTCD. The MTCD then uses the stored uplink timing adjustment value from a previous uplink transmission for synchronizing uplink timing for a subsequent uplink transmission from the MTCD to the network element even following a period of inactivity of the MTCD, or expiration of any existing maximum uplink timing alignment period permitted for use of the timing adjustment value by the MTCD, or MTCD clock drift.
Abstract:
Methods and systems for wireless communications by performing HARQ-based retransmissions using vertical check blocks are described. After performing an initial transmission, a first retransmission is performed. The first retransmission includes at least one vertical check block from a first set of vertical check blocks generated using a first subblock interleaver set associated with a first RV index of the first retransmission. A second retransmission is performed, including at least one vertical check block from a second set of vertical check blocks generated using a second subblock interleaver set associated with a second RV index of the second retransmission.
Abstract:
Embodiments of this application provide a signal transmission method and apparatus, and the method includes: filtering a first time domain orthogonal frequency division multiplexing (OFDM) signal at each of M spatial transmission layers, where M is an integer greater than or equal to 1; performing spatial precoding on the filtered first time domain OFDM signal at each of the M spatial transmission layers, and mapping the filtered first time domain OFDM signal at each of the M spatial transmission layers to each of Nt transmit antenna ports, where Nt is an integer greater than or equal to M; and superposing and transmitting the first time domain OFDM signals that are at the M spatial transmission layers and that are mapped to all the Nt transmit antenna ports.
Abstract:
Embodiments of the present invention provide a pilot signal generation method and apparatus, so as to implement sharing of one pilot by multiple UEs when it is ensured that each of the multiple UEs can correctly obtain a data stream, thereby reducing pilot overheads. The method includes: determining a first pilot signal shared by multiple UEs, where the multiple UEs are multiple UEs transmitting data streams on a same time-frequency resource; determining a pilot precoding vector of first UE and a data stream receiving gain of the first UE according to current downlink channel information of the multiple UEs, where the first UE is one of the multiple UEs; and generating, according to the first pilot signal, the data stream receiving gain of the first UE, and the pilot precoding vector of the first UE, a second pilot signal that is to be sent to the first UE.
Abstract:
Methods and apparatuses for providing feedback in a HARQ scheme are described. A transmission-specific channel quality indicator (CQI) feedback scheme is described. A channel coding-related feedback scheme is also described.
Abstract:
Systems and methods are provided for identifying an available infrastructure network topology consisting of a set of available network links and a set of available network nodes of a communication network. In the systems and methods, a network node of the communication network is operative to transmit a learning schedule to a plurality of network nodes interconnected by a set of network links of the communication network. The network node receives from each of the plurality of network nodes a communication node record including network performance observations observed by that network node based on the learning schedule transmitted to that network node. Based on the received communication node records, the network node identifies a set of available network links from the set of network links and the set of available network nodes corresponding to the set of available network links.
Abstract:
A resource mapping method and apparatus and a resource mapping indication method and apparatus are provided to adapt to an interference cancellation function of a receiver. The method is: A network device obtains a mapping mode used for resource mapping during uplink transmission. The network device sends, to a terminal, information indicating the mapping mode. The mapping mode is used to indicate mapping locations of a plurality of modulation symbols in a resource mapping block RMB, the RMB comprises a plurality of resource elements REs, and at least one RE carries at least two modulation symbols.
Abstract:
The present application relates to a filtering scheme with low complexity. The method includes: dividing an orthogonal frequency division multiplexing (OFDM) signal into a first sideband signal, a first signal, and a second sideband signal; sampling the first sideband signal by using a first sampling rate; sampling the first signal by using a second sampling rate; sampling the second sideband signal by using a third sampling rate; and separately performing filtering processing of a third spectral mask, upsampling processing, and digital frequency conversion processing to generate a first filtered-OFDM (f-OFDM) signal, a second f-OFDM signal and a third f-OFDM signal; and superposing the first f-OFDM signal, the second f-OFDM signal, and the third f-OFDM signal to obtain an f-OFDM signal, where the first sampling rate and the third sampling rate are both less than the second sampling rate.