A signal sending device, a signal receiving device, and a signal sending and receiving system and method are presented. The devices and system combine a plurality of sense data into a data packet to transmit the data packet. Through the method, the data packet is processed, received, and sent under a transmission mechanism based on independent data packets. Therefore, the plurality of sense data and overhead data are combined into a data packet, and thus the redundant overhead data is reduced, so as to reduce the time spent on sending actual data to a transmission channel, thus improving the efficiency of data exchange and saving electrical energy.

A method for MU MIMO channel sounding by a STA includes receiving, from an AP, sounding information including an indication of a first STA of a group of STAs to transmit feedback and training symbols. The method further includes receiving, from the AP, a frame addressed to the group of STAs, wherein the frame includes a PHY preamble including group identification information identifying the group of STAs. The group identification information enables another STA not in the group of STAs, that receives the frame, to set its network allocation vector (NAV) timer based on a duration field in the frame. On a condition the STA is a first STA in the order of the group of STAs, a first sounding response frame may be transmitted to the AP, wherein the first sounding response frame includes quantized sounding feedback determined from the received training symbols.

From a base station, a user equipment receives a mixed data signal transmitted in a format in which multiple data signals are transmitted with different downlink transmission powers such that the multiple data signals are not orthogonal to each other, multiple control signals corresponding to multiple user equipments, and information indicating an identifier of another user equipment. The user equipment determines an aggregation level of the subject user equipment. The user equipment uses the identifier of the other user equipment to attempt descrambling of one control signal among multiple control signals corresponding to an aggregation level higher than or equal to the aggregation level of the user equipment, and if the descrambling is successful, the user equipment uses the control signal to demodulate the non-orthogonal data signal.

From a base station, a user equipment receives a mixed data signal transmitted in a format in which multiple data signals are transmitted with different downlink transmission powers such that the multiple data signals are not orthogonal to each other, multiple control signals corresponding to multiple user equipments, and information indicating an identifier of another user equipment. The user equipment determines an aggregation level of the subject user equipment. The user equipment uses the identifier of the other user equipment to attempt descrambling of one control signal among multiple control signals corresponding to an aggregation level higher than or equal to the aggregation level of the user equipment, and if the descrambling is successful, the user equipment uses the control signal to demodulate the non-orthogonal data signal.

A method and a wireless transmit/receive unit perform a handoff to a target base station having enhanced capabilities. A dual mode manager triggers a capabilities query for information regarding enhanced capability of the target base station, wherein the enhanced capability includes transmission in accordance with a high speed data mode. A generator sends the query to a server connected to the Internet via a first base station not having enhanced capability. The dual mode manager receives from the server via the first base station information regarding the enhanced capability. A handoff to the target base station is initiated by the dual mode manager on a condition that the received information indicates that the target base station has enhanced capability. The dual mode manager deactivates a first mode of operation for communication with the first base station and activates the high speed data mode for communication with the target base station.

A method and a wireless transmit/receive unit perform a handoff to a target base station having enhanced capabilities. A dual mode manager triggers a capabilities query for information regarding enhanced capability of the target base station, wherein the enhanced capability includes transmission in accordance with a high speed data mode. A generator sends the query to a server connected to the Internet via a first base station not having enhanced capability. The dual mode manager receives from the server via the first base station information regarding the enhanced capability. A handoff to the target base station is initiated by the dual mode manager on a condition that the received information indicates that the target base station has enhanced capability. The dual mode manager deactivates a first mode of operation for communication with the first base station and activates the high speed data mode for communication with the target base station.

There is provided mechanisms for determining Universal Terrestrial Radio Access (UTRA) environment for a wireless terminal (WT). The WT supports operation in both a UTRA frequency-division duplexing (UTRA-FDD) environment and a UTRA time-division duplexing (UTRA-TDD) environment. The WT acquires a need for determining its UTRA environment. The WT determines its UTRA environment based on network information received by the WT. The network information indicates if the WT is in the UTRA-FDD environment or in the UTRA-TDD environment.

A signal sending device, a signal receiving device, and a signal sending and receiving system and method are presented. The devices and system combine a plurality of sense data into a data packet to transmit the data packet. Through the method, the data packet is processed, received, and sent under a transmission mechanism based on independent data packets. Therefore, the plurality of sense data and overhead data are combined into a data packet, and thus the redundant overhead data is reduced, so as to reduce the time spent on sending actual data to a transmission channel, thus improving the efficiency of data exchange and saving electrical energy.

As part of a communication session, a wireless source device can transmit audio and video data to a wireless sink device, and the wireless sink device can transmit user input data received at the wireless sink device back to the wireless source device. In this manner, a user of the wireless sink dev ice can control the wireless source device and control the content that is being transmitted from the wireless source device to the wireless sink device. The user input data transmitted by the wireless sink device can be input data obtained at a third party device and forwarded to the wireless source device.

A method performed by a STA may comprise receiving, from an access point, a RTS frame having a duration field and transmitting, to the AP, in response to receiving the RTS frame, a CTS frame. The method may further comprise receiving, from the AP, data of a MU data unit addressed to the STA and another STA and, in response, transmitting an ACK frame, to the AP. The data may be received by the STA on a subset of sub-carrier frequencies of which the MU data unit spans and the MU data unit and the ACK frame may be transmitted within a duration indicated by the duration field.