36 results about "Frame check sequence" patented technology

This disclosure relates to methods for transmitting an initial control frame with pre-padding frame check sequence in a wireless local area network. An initial control frame that includes an intermediate frame check sequence may be transmitted from an access point to multiple recipient wireless devices. An intermediate frame check sequence may be located between the last user info field and the Padding field of the initial control frame. The recipient wireless device may perform a frame check sequence check for the initial control frame using the intermediate frame check sequence.

The present application relates to the field of communications, and discloses a communication method and apparatus. The method comprises: receiving a trigger frame, the trigger frame comprising a first field and a first user information field bearing a second frame check sequence, the first field comprising a first indication field, and the first indication field being used for indicating the position of the second frame check sequence; and, on the basis of the first indication field, determining the position of the second frame check sequence. According to the present application, the position of the second frame check sequence can be simply and quickly located, so that the power consumed for parsing the trigger frame is greatly reduced, and the speed of determining the second frame check sequence or parsing the trigger frame is increased.

The present application provides a communication method and apparatus, the method comprising: generating a trigger frame, the trigger frame comprising a first frame check sequence (FCS) and a second FCS, in which the second FCS precedes the first FCS, the second FCS is continuous, a first portion of the second FCS being included in a first user information field in the trigger frame; sending a trigger frame; the second FCS can be verified more accurately by an FCS verification algorithm assuming that the FCS is continuous. The application supports an IEEE protocol, such as an IEEE 802.11 be / Wi-Fi 7 / EHT protocol, an IEEE 802.11 bn / UHR / Wi-Fi 8 protocol, an IMMW protocol, an IEEE 802.15 / UWB protocol, or an IEEE 802.11 bf protocol; the method can also support a satellite flash standard protocol.

The invention belongs to the technical field of space laser communication, and discloses a frame structure and a space optical communication method and system. The frame structure provided by the invention comprises a synchronization sequence and a data sequence, the synchronization sequence comprises a lead code and a frame start character, and the data sequence comprises a control signaling, an information bit and a frame check sequence; the lead code is embedded into the beacon light, and the frame start character and the data sequence are embedded into the signal light. The method comprises the following steps: determining a channel state at a transmitting end according to monitoring information, further determining a transmission control parameter, modulating a beacon laser to generate a lead code in combination with a control time sequence, modulating a signal laser to generate a data frame except the lead code, forming a complete optical signal based on the control time sequence, and transmitting the optical signal; an optical signal is separated into beacon light and signal light at a receiving end, a lead code is detected through an electric signal output by a beacon light detector, and a frame start character and an information bit are detected through an electric signal output by a signal light detector. According to the invention, the communication system can work stably in a turbulent environment.

Techniques pertaining to new padding schemes in wireless communications are described. An apparatus (e.g., an access point (AP) station (STA) or a non-AP STA) performs a wireless communication by: (a) generating and transmitting a physical-layer protocol data unit (PPDU); or (b) receiving and processing the PPDU. The PPDU comprises (AID) -based information that includes either or both of an intermediate frame check sequence (FCS) and security information.

The present disclosure provides implementations for receiving and processing packets in a wireless local area network (WLAN). A WLAN device, such as a station or an access point, may replace content in a received packet with predetermined content based on the received packet failing to pass a frame check sequence (FCS), and the WLAN device may attempt to process the packet. In this manner, the WLAN device may not need to wait for a new packet, and the transmitting device may not need to re-transmit the packet. In some aspects, a WLAN device stores first content of a first packet. The first packet may include a mask or table indicating fields to be replaced in the received frame and content to be included in those fields. The first packet may be generated from known settings of the WLAN or transmitting device or may be generated from previously received packets.

A wireless device may use UWB communications in connection-oriented mode to transmit data. In some embodiments, data subframes may be introduced into a MAC frame. In some embodiments, the data subframes contain a LL packet wrapped with its own delimiter, Data Message Payload information element, and frame check sequence. In some embodiments, the data subframes may also include a duplicated MAC header.

This invention relates to the field of communication technology, specifically to a collision detection method and related equipment for ultra-short-range shared medium networks. The method includes: a master node broadcasting downlink messages on a downlink channel, and slave nodes sending uplink messages within a shared uplink contention window; each slave node starting an acknowledgment response timer for each sent uplink message and waiting to receive an acknowledgment message from the master node; the master node performing frame check sequence verification on the received uplink messages, and if a verification error is found, sending a verification error alarm message to the slave node at the corresponding source address; the slave node determining a serious collision when the acknowledgment response timer expires, or determining a collision event when it receives a verification error alarm message; and the slave node executing a backoff strategy based on the collision detection results. This invention enables efficient and reliable collision detection without adding additional hardware receivers, reducing system costs and design complexity, and is suitable for ultra-short-range scenarios such as intra-robot communication.

This disclosure provides methods, components, devices and systems for beacon extension design. A wireless station may receive one or more beacon containers including a beacon extension container and may communicate one or more messages based on segments of the one or more beacon containers that are relevant for the wireless station. Each segment may correspond to a respective device type. Each segment may include a frame check sequence and a message integrity code corresponding to each respective segment. The wireless station may receive a first beacon container according to a first periodicity and a second beacon container according to a second periodicity. The first and second periodicities may have different values based on the device type of the wireless station. The beacon containers may include type-specific segments corresponding to the device type. Each type-specific segment may include parameters or updated information for the wireless station.

A clock signal in a clock distribution network is transmitted using network packets with the clock signal embedded within a bit of the network packets. The network packets can include a preamble used to create phase alignment between a timing pulse and a bit position of a Start of Frame Delimiter (SFD) within the packet. The clock signal associated with the packet occurs when the SFD is detected. In one example, the SFD is detected when two consecutive bits of equal value are received and the timing of the clock signal is such that the clock signal occurs when the second consecutive bit is received. By including a clock signal within a packet, additional information can be transmitted with the clock signal. For example, authentication and validation information can be included, a time stamp, a message type, a frame check sequence, a clock status, a number of hops from the root, etc.

This disclosure provides methods, components, devices and systems for beacon extension design. A wireless station may receive one or more beacon containers including a beacon extension container and may communicate one or more messages based on segments of the one or more beacon containers that are relevant for the wireless station. Each segment may correspond to a respective device type. Each segment may include a frame check sequence and a message integrity code corresponding to each respective segment. The wireless station may receive a first beacon container according to a first periodicity and a second beacon container according to a second periodicity. The first and second periodicities may have different values based on the device type of the wireless station. The beacon containers may include type-specific segments corresponding to the device type. Each type-specific segment may include parameters or updated information for the wireless station.

The embodiment of the invention provides a chip screening method and device, equipment and a medium, and relates to the technical field of chip detection, and the method comprises the steps: introducing a test model message from a drainage port of an Ethernet switch chip, and taking each port of the Ethernet switch chip as a target port. And controlling each target port to perform a self-loop test based on the test model message, and closing the function of re-editing the frame verification sequence field of the Ethernet switch chip in the self-loop test process. And whether the Ethernet switch chip is the target chip is determined based on whether each target port has the frame verification sequence field error count for the test model message, so that the screening reliability of the Ethernet switch chip is improved.

An embodiment includes generating, by an access point (AP), a trigger frame that solicits a response from one or more stations (STAs), where the trigger frame includes a pre frame check sequence (pre-FCS) field, a padding field, and a frame check sequence (FCS) field, the pre-FCS field preceding the padding field, transmitting, to the one or more STAs, the trigger frame to request the one or more STAs to perform a dynamic sub-band switch operation, and determining whether the dynamic sub-band switch operation is successfully performed at the one or more STAs based on whether or not a response is received from the one or more STAs in response to the trigger frame.

A wireless transmission method, for a wireless communication network having a transmission device and a reception device, wherein the wireless transmission method includes transmitting, by the transmission device, a first packet including at least a partial frame check sequence (PFCS) and retransmitting the first packet to the reception device; and combining, by the transmission device, the first packet and the first packet retransmitted by the transmission device as a complete packet; wherein no acknowledgement (ACK) message exists in a time sequence between the first packet, transmitted by the transmission device and the retransmitted first packet.

According to an embodiment of the present disclosure an electronic device is provided. The electronic device includes memory storing instructions, and at least one processor operably coupled to the memory. The instructions, when executed by the at least one processor individually or collectively, cause the electronic device to: receive, from another electronic device, at least a first portion of a frame, the first portion including a preliminary frame check sequence (FCS) value, perform a first cyclic redundancy check (CRC) on bits included in the first portion of the frame occurring before the preliminary FCS value, based on the preliminary FCS value, and determine whether to continue reception of the frame based on a result of the first CRC.

The present disclosure provides methods, components, devices, and systems for beacon extension design. A wireless station can receive one or more beacon containers including a beacon extension container and can communicate one or more messages based on a section of the one or more beacon containers related to the wireless station. Each section can correspond to a respective device type. Each section can include a frame check sequence and a message integrity code corresponding to each respective section. The wireless station can receive a first beacon container according to a first periodicity and a second beacon container according to a second periodicity. The first periodicity and the second periodicity can have different values based on a device type of the wireless station. The beacon container can include a type-specific section corresponding to the device type. Each type-specific section can include a parameter or updated information of the wireless station.

Disclosed in the present application are a communication method and apparatus. The present application supports an IEEE protocol, such as an IEEE 802.11be / Wi-Fi7 / EHT protocol, an IEEE802.11bn / UHR / Wi-Fi8 protocol, an IEEE Integrated mmWave / IMMW protocol, an IEEE 802.15 / UWB protocol, or an IEEE 802.11bf / sensing protocol. The present application also supports a spark link / nearlink standard protocol. The method comprises: generating and sending a first MPDU, wherein the first MPDU comprises a plurality of pieces of data content and a plurality of first frame check sequences, the plurality of first frame check sequences being used for checking whether each of the plurality of pieces of data content is correctly transmitted or correctly received. The present application can reduce retransmission overheads.

This disclosure provides implementations for receiving and processing packets in a wireless local area network (WLAN). A WLAN device (such as a station or access point) may replace content in a received packet with predetermined content based on the received packet failing a frame check sequence (FCS), and the WLAN device may attempt to process the packet. In this manner, the WLAN device may not need to wait for a new packet, and the transmitting device may not need to retransmit the packet. In some aspects, the WLAN device stores a first content of a first packet. The first packet may include a mask or table indicating the fields to be replaced in a received frame and the content to include in those fields. The first packet may be generated from known settings of the WLAN or transmitting device or may be generated from a previously received packet.

A network interface device comprises circuitry to add a frame check sequence value a data packet to be transmitted onto a network. The data packet with the frame check sequence value is stored in memory. Media access control layer circuitry reads the data packet from the memory and determines if the frame check sequence value is correct. When it is note correct, it is determined that the data in the data packet is corrupted.

The invention discloses an Ethernet data sending and receiving processing method and device and a switch chip architecture, and the Ethernet data sending method comprises the steps: obtaining a to-be-sent data packet, and judging whether the size of the data packet meets a preset small packet condition or not; if yes, entering a first mode for processing, the first mode comprising: modifying a physical layer lead code of the data packet to make the physical layer lead code contain a specific coding sequence for identifying the first mode; removing a destination MAC address field, a source MAC address field and a frame check sequence (FCS) field in the link layer package of the data packet; and if not, entering a second mode for processing, and packaging in the message format of the traditional Ethernet in the second mode. According to the Ethernet data sending method, the data transmission efficiency of the Ethernet can be improved, and meanwhile, the lead code is set to be the specific preset value, so that the load ratio (the proportion of the payload / Header + the payload) and the transmission efficiency of the payload can be improved in subsequent processing.

A clock signal in a clock distribution network is transmitted using network packets with the clock signal embedded within a bit of the network packets. The network packets can include a preamble used to create phase alignment between a timing pulse and a bit position of a Start of Frame Delimiter (SFD) within the packet. The clock signal associated with the packet occurs when the SFD is detected. In one example, the SFD is detected when two consecutive bits of equal value are received and the timing of the clock signal is such that the clock signal occurs when the second consecutive bit is received. By including a clock signal within a packet, additional information can be transmitted with the clock signal. For example, authentication and validation information can be included, a time stamp, a message type, a frame check sequence, a clock status, etc.

This disclosure relates to methods for transmitting an initial control frame with pre-padding frame check sequence in a wireless local area network. An initial control frame that includes one or more per-user frame check sequences may be transmitted from an access point to multiple recipient wireless devices. Each per-user frame check sequence may be included in a user info field of the initial control frame corresponding to a recipient wireless device. The recipient wireless device may perform a frame check sequence check for the initial control frame using the per-user frame check sequence.

The present application relates to the technical field of WLANs, and discloses a communication method and apparatus, capable of quickly and effectively verifying an initial control frame, thereby improving the efficiency of data transmission. The method comprises: acquiring an initial control frame, wherein the initial control frame comprises a first field and a frame check sequence field, the first field is used for bearing a second frame check sequence, the second frame check sequence is used for verifying a field before the first field in the initial control frame and some or all of bits in the first field other than the second frame check sequence, the frame check sequence field is used for bearing a first frame check sequence, and the first field is located before the frame check sequence field; and sending the initial control frame to a first multi-link device, wherein the initial control frame is used for instructing the first multi-link device to switch from a monitoring state to a wake-up state.

The present application provides a communication method and apparatus. The method comprises: generating a trigger frame, wherein the trigger frame comprises a first frame check sequence (FCS) and a second FCS, the second FCS precedes the first FCS within the trigger frame, the second FCS is continuous, and a first part of the second FCS is included in a first user information field in the trigger frame; and sending the trigger frame, thereby enabling an FCS check algorithm that assumes an FCS to be continuous to check the second FCS more accurately. The present application supports IEEE protocols, such as an IEEE 802.11be / Wi-Fi 7 / EHT protocol, an IEEE 802.11bn / UHR / Wi-Fi 8 protocol, an IMMW protocol, an IEEE 802.15 / UWB protocol, or an IEEE 802.11bf protocol. The present application can also support a NearLink standard protocol.

The invention discloses a data communication method, device and system and a storage medium, and relates to the technical field of Ethernet communication, and the data communication method comprises the steps: firstly obtaining a plurality of data packets generated by an upper-layer application, and then constructing corresponding communication sub-packets according to the data length, the content and the check code of the data packets; and extracting a standard Ethernet frame header, inserting a combined identification field, splicing the communication sub-packets to the identification field in sequence, adding a frame verification sequence to generate a combined packet, and sending the combined packet to a receiving end. And the receiving end executes first integrity check through the frame check sequence, splits the communication sub-packets according to the merging identifier after the first integrity check passes, and executes second integrity check through the communication sub-packet check code to process the effective communication sub-packets. According to the invention, the redundancy overhead is reduced through merging and packaging of multiple small data packets, the equipment compatibility is guaranteed by the standard frame header, the anti-error-code capability is improved through double-layer verification, and the transmission efficiency and the anti-error-code performance of the small data packets can be optimized while the compatibility is considered.

This disclosure provides methods, devices, and systems for wireless communications. The present implementations more specifically relate to trigger frame designs that support early validation of trigger frames. In some aspects, an AP may transmit a trigger frame soliciting a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) from one or more wireless stations (STAs), where the trigger frame includes one or more user information fields, an early frame check sequence (eFCS) following the user information fields, a series of padding bits following the eFCS, and a frame check sequence (FCS) following the series of padding bits. Each STA associated with the AP may receive and validate a first portion of the trigger frame based on the eFCS. Any non-solicited STAs that receive the trigger frame may enter a low power mode in response to validating the first portion of the trigger frame, without receiving the padding bits.

A method and a device for operating in a wireless LAN system are disclosed. The method according to one embodiment of the present disclosure comprises steps in which a first station (STA): receives, from a second STA, a trigger frame including an intermediate frame check sequence (FCS) field; and transmits, to the second STA, a response frame based on the trigger frame, wherein a common information field of the trigger frame includes a first field related to whether the intermediate FCS field is included in the trigger frame, and the intermediate FCS field can be included in at least one user information field of the trigger frame.

A wireless transmission method and a related wireless communication system are provided. A wireless transmission method for a wireless communication network, the wireless communication network comprising a transmitting device and a receiving device, the wireless transmission method comprising: the transmitting device transmitting a first packet comprising at least a partial frame check sequence and retransmitting the first packet to the receiving device; the receiving device forms a complete packet according to the first packet from the transmitting device and the first packet retransmitted by the transmitting device; wherein the transmitting device does not include an acknowledgement response in timing between transmitting the first packet and retransmitting the first packet.

A method and a device for operating in a wireless LAN system are disclosed. A method according to an embodiment of the present disclosure may comprise the steps of: receiving, by a first station (STA), a block acknowledgement request (BAR) frame including an intermediate frame check sequence (FCS) field from a second STA; and decoding the BAR frame by the first STA, wherein the intermediate FCS field includes at least one set of a fragment number subfield and an intermediate FCS value subfield in which an intermediate FCS value is configured, and the length of a padding field in the BAR frame is based on a dynamic power save (DPS) padding delay field.

Disclosed are a method and apparatus for operating in a wireless LAN system. The method according to an embodiment of the present disclosure comprises the steps of: receiving, by a first station (STA), a block acknowledgement request (BAR) frame from a second STA; and decoding, by the first STA, the BAR frame, wherein the BAR frame includes at least one set of a per traffic identifier (TID) information subfield and an intermediate frame check sequence (FCS) subfield, and a first per TID information subfield of a first set from among the at least one set may include a TID value subfield related to a first intermediate FCS value.