30 results about "Physical Layer Convergence Protocol" patented technology

In an example embodiment, a method for speculative power saving. The beginning portion of a header (e.g. a physical layer convergence protocol “PLCP” header of a beacon) is processed to determine whether a predefined bit is set that indicates whether the frame contains any delivery traffic indication for buffered multicast and/or unicast frames. If the bit is set, indicating the frame contains no delivery traffic indication of buffered frames, receiving and processing of the frame stops (e.g. the remainder of the PPDU is not processed) and the receiver switches to a power save state. In an example embodiment, if a predefined NULL beacon frame is detected, receiving and processing of the frame (and PPDU) stops and the receiver switches to a power save state.

This document discloses a method and an apparatus for transmitting a paging frame and wakeup frame. The An AP comprises a transceiver receiving a paging frame from an STA; and a processor generating a wakeup frame for informing of existence of buffered data to be transmitted to the STA in response to the paging frame, where the paging frame includes a PLCP (Physical Layer Convergence Protocol) header and the PCLP header includes a waiting time field indicating a waiting time during which an STA is operated in the active mode to receive the wakeup frame; and the wakeup frame includes a PLCP header and the PLCP header includes a wakeup indication indicating the wakeup frame and a wakeup STA identification having information specifying the STA. Therefore, an STA can reduce power consumption wasted in the active mode.

A method of transmitting a data frame is disclosed and may include transmitting a preamble, transmitting a physical layer convergence protocol (PLCP) header, and transmitting a plurality of MAC protocol data units (MPDUs). Each MPDU may be configured to reset a convolutional decoder state after each MPDU. The method may also include transmitting an MPDU aggregation header. The MPDU aggregation header may include a count of packed MPDUs, an array of offsets, an array of lengths, a frame check sequence (FCS) for the MPDU aggregation header, a group of tail bits, or a combination thereof. Further, an end of the MPDU aggregation header may be aligned to an interleaved symbol boundary.

Disclosed are a method and an apparatus for indicating a frame type using a physical layer convergence protocol header. A method for determining a frame type using a PLCP header may comprise: a step of demodulating a frame type contained in an SIG of the PLCP header so as to acquire information indicating a physical service data unit (PSDU) of a frame; and a step of acquiring frame information required for demodulating the frame contained in the SIG dependently on the information indicating PSDU. Thus, unnecessary information may not be additionally demodulated to thereby improve demodulation efficiency and reduce unnecessary power consumption.

A method and apparatus for distributing beacon information includes a first WTRU modifying a physical layer convergence protocol (PLCP) header in a physical protocol data unit (PHY PDU) frame to include beacon information. The first WTRU transmits the modified PLCP header to a second WTRU. The second WTRU receives the modified PLCP header and extracts beacon information from the modified PLCP header. The second WTRU associates with the first WTRU.

Methods, devices and systems are provided for performing for multi-user (MU) transmission. A wireless transmit/receive unit (WTRU) may be configured to receive a frame, decode the received frame and determine whether the received frame is a null data packet (NDP) multi-user (MU) media access control (MAC) physical layer convergence protocol (PLCP) protocol data unit (PPDU) (NDP MU MAC PPDU) based on meeting an NDP condition. The NDP MU MAC PPDU may correspond to an MU transmission and may include a PLCP header which includes an NDP signal (SIG) field having MU control information. Based on the received frame meeting the NDP condition, the WTRU may be further configured to process the NDP SIG field, generate a response based on the NDP SIG field and the MU control information, and transmit the response.

Disclosed are method and device for indicating a PLCP header transmission mode. A method for generating a physical layer convergence protocol (PLCP) of a data frame can comprise the following steps: demodulating PLCP header mode information based on a scrambling sequence of the received frame or information elements included in the received frame; and generating a data frame including the PLCP header generated based on the PCLP header mode information. The PLCP header mode information comprises at least one indication from a space time block coding mode indication, a guard interval mode indication, and a repetition mode indication. The invention is capable of improving data transmission efficiency by adaptively determining a transmission mode of a PCLP header to a channel situation.

The invention provides a method for adjusting the wireless output power of a wireless terminal. The method comprises the steps of: reading a signal intensity value in a PLCP (Physical Layer Convergence Protocol) header in the wireless communication process of the wireless terminal and a wireless product; judging whether the signal intensity value is at a set signal intensity interval, and when the signal intensity value is higher than the upper limit value of the signal intensity interval, lowering the wireless output power of the wireless terminal; and when the signal intensity value is lower than the lower limit value of the signal intensity interval, raising the wireless output power of the wireless terminal. The invention further provides a wireless terminal capable of automatically adjusting the wireless output power.

The invention provides a method and system for realizing wireless communication. The method comprises: related work, with a high real-time performance requirement, of a low-level protocol of a communication system is realized based on real-time extension (RTX), wherein the related work includes related work of a physical layer protocol and a physical layer convergence protocol layer state machine; relates work, with a low real-time performance requirement, of a high-level protocol of a communication system is realized based on windows, wherein the related work includes related work of an MAC layer protocol and a network layer protocol; and a shared memory and an event body are established, so that information synchronization and interaction between the low-level protocol of the communication system and the high-level protocol of the communication system are realized. According to the technical scheme, the real-time extension characteristic of the RTX is fully utilized; and the real-time performance and stability of the wireless communication system based on the Windows system can be enhanced substantially.

A method, a wireless transmit/receive unit (WTRU) and a base station for transferring small packets are described. The WTRU generates a packet that has one or more of a medium access control (MAC) or a physical layer convergence protocol (PLCP) header, the one or more of the MAC or the PLCP header including a field. On a condition that the WTRU has data buffered for transmission, the WTRU includes in the field information that indicates a time or a transmission opportunity (TXOP) needed to transmit at least one packet of data that the WTRU has buffered for transmission. The WTRU transmits the packet to another WTRU in the wireless network. The WTRU receives another packet from the other WTRU with a granted TXO) based on the time needed to transmit the at least one packet of the data that the WTRU has buffered for transmission.

An apparatus and a method for allocating a multiple resource unit (RU) for a user in a wireless local area network (WLAN) system are provided. A transmission device of the WLAN system includes a transceiver that generates a physical layer convergence protocol (PLCP) protocol data unit (PPDU) including a preamble and a payload and transmitting the generated PPDU to at least one receiving device and a processor controlling the transceiver. The preamble includes a plurality of training fields and a plurality of signaling fields. Resource unit (RU) allocation information on the at least one receiving device is included in one of the plurality of signaling fields. The RU allocation information includes a first subfield indicating an arrangement of RUs in a frequency domain corresponding to the PPDU and a second subfield indicating a portion of the RUs to be combined to form a multiple RU.

Systems and methods for wake up signaling in 802.11 DFS channels include enabling a primary connectivity radio of a device responsive to a wake up radio of the device receiving a composite radio signal transmitted by an access point in an 802.11 Dynamic Frequency Selection (DFS) channel, the composite radio signal comprising a wake up radio signal and a time-continuous signal, the time-continuous signal being substantially adjacent in frequency, but not necessarily contiguous in frequency, to the wake up radio signal; and exchanging data with the access point through the primary connectivity radio after the primary connectivity radio is enabled. The wake up radio signal may be an IEEE 802.11ba signal disposed in a center frequency band of a IEEE 802.11ax Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU). The time-continuous signal may be real or emulated data traffic disposed in at least one IEEE 802.11ax resource unit.

The invention provides a communication method and communication device of a wireless local area network, an access point and a site. The communication method of the wireless local area network comprises: generating physical layer convergence protocol unit data frames, wherein the physical header of the physical layer convergence protocol unit data frames comprise identifying bits for indicating the repeated emergence conditions of HE (High efficiency)-SIGA (Signal) fields; and sending the physical layer convergence protocol unit data frames to a receiving side. According to the technical solution of the invention, the repeated emergence conditions of the HE-SIGA fields can be rationally defined and indicated; further the repeated mode of the HE-SIGA is ensured to be applied so as to expand the coverage; and therefore, the regional throughput is indirectly improved.

The invention belongs to the technical field of wireless communication testing, and provides a data signal simulation method and device of a wireless connection physical layer convergence protocol preamble. The method comprises the following steps: in a multi-user transmission scene, acquiring MAC layer data and transmitting the MAC layer data to a physical layer; generating a physical layer convergence protocol preamble in the physical layer; adding the MAC layer data to a physical layer convergence protocol preamble to form presentation layer protocol data; transmitting the presentation layer protocol data to realize wireless data signal simulation; the signal simulation process of the physical layer convergence protocol preamble comprises the following steps: configuring an SIG domain in the physical layer convergence protocol preamble, and integrating related parameter items of the SIG domain into a setting page in the configuration process; and the contents of the other domains are automatically calculated based on the MAC layer data and the configured parameters in the SIG domain.