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.

A wireless device (11) configures a carrier for communication with a serving access point (10). The wireless device (11) maintains a virtual carrier sense timer. The virtual carrier sense timer indicates that the carrier is to be regarded as occupied as long as the virtual carrier sense timer is not expired. The wireless device (11) receives one or more wireless transmissions on the carrier. The one or more wireless transmissions each include: an identifier commonly assigned to multiple access points which cooperate by sharing a transmission opportunity, and a duration field for indicating a duration for which the carrier is expected to be occupied. In response to the identifier matching an identifier of the serving access point (11), the wireless device (11) updates the virtual carrier sense timer according to the indicated duration. Based on the virtual carrier sense timer, the wireless device (11) controls one or more UL wireless transmissions from the wireless device (11).

Wireless communications systems and methods related to uplink (UL) transmissions with CP extensions. A user equipment (UE) receives, from a base station (BS), one or more grants for a plurality of uplink transmissions in a shared radio frequency band. The UE determines a cyclic prefix (CP) extension length for a first uplink transmission of the plurality of uplink transmissions such that a first gap duration between a second uplink transmission of the plurality of uplink transmissions and the first uplink transmission satisfies a first time threshold for transmitting the first uplink transmission in the shared radio frequency band without a listen-before-talk (LBT), the second uplink transmission preceding the first uplink transmission. The UE transmits, to the BS in the shared radio frequency band, one or more uplink transmissions of the plurality of uplink transmissions, where the first uplink transmission with the first CP extension is transmitted without performing the LBT.

The present technology relates to a wireless communication device and method, and a wireless communication terminal and method which allow for increased transmission opportunities using multi-link aggregation.

A communication control device transmits a first parameter and a second parameter. The first parameter is used for setting of communication in which a wireless communication terminal uses a plurality of links. The second parameter is used for setting of communication in which the wireless communication terminal uses a single link. It is possible to apply the present technology to a wireless communication system.

Methods, systems, and devices for wireless communications are described. A set of user equipments (UEs) may communicate with each other on communication links using data resources from a pool of shared resources. The UEs may be configured to multiplex control resources with data resources of a shared resource pool. In some cases, a UE may communicate, in control resources, control signaling to reserve data resources of a shared resource pool. After transmitting the request, the UE may communicate data in one or more data resources. The UE may communicate the data using transmission components while concurrently processing control signaling using other components.

Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.

A data reporting method includes generating a data uploading token by a main network node, determining, from a plurality of data-uploading network nodes waiting for data uploading, a plurality of qualified network nodes having a data uploading qualification, allowing the qualified network nodes to compete for the data uploading token, and coordinating a data uploading operation with a winning network node of the qualified network nodes that obtained the data uploading token.

A technique for transmitting and receiving data in a radio communication from a second radio device to a first radio device is described. As to a method aspect of the technique, one or more radio resources are determined based on radio signals received at the first radio device. The one or more radio resources comprise at least one spatial stream among different spatial streams receivable at the first radio device. A status message indicative of the one or more determined radio resources is transmitted to the second radio device. The data from the second radio device is received at the first radio device on at least one radio resource depending on the one or more radio resources indicated in the transmitted status message.

A technique for transmitting and receiving data in a radio communication from a second radio device to a first radio device is described. As to a method aspect of the technique, one or more radio resources are determined based on radio signals received at the first radio device. The one or more radio resources comprise at least one spatial stream among different spatial streams receivable at the first radio device. A status message indicative of the one or more determined radio resources is transmitted to the second radio device. The data from the second radio device is received at the first radio device on at least one radio resource depending on the one or more radio resources indicated in the transmitted status message.

Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to adjust a random access message that is transmitted to a base station in an asynchronous uplink transmission. The UE may use a constrained mapping of time and frequency resources for the random access message or transmit all portions of the message in a continuous transmission. The UE may also adjust the timing of the portions of the message. The base station may use a portion of the message, such as a preamble, to perform channel estimation for another portion of the message, such as a payload, to improve decoding of the transmitted message. Additionally, the UE may configure a waveform of the message to improve the continuous transmission of the message, for example by reducing interference between portions of the message.