Abstract:
Example methods for transmitting a physical layer protocol data unit (PPDU) and apparatus are described. One example method includes generating and transmitting a PPDU that includes a long training field (LTF). A length of a frequency-domain sequence of the LTF is greater than a first length, and the first length is a length of a frequency-domain sequence of an LTF of a first PPDU transmitted over a channel whose bandwidth is 160 MHz.
Abstract:
This application discloses a communication method and apparatus. The method includes: receiving, by a first device, a first message, where the first device is a primary access network device of a terminal device in a first state, the terminal device in the first state does not send channel state information to the first device, and a core network device and the first device reserve a data plane connection of the terminal device in the first state; determining, by the first device based on the first message, that a second device is a secondary access network device of the terminal device in the first state; sending, by the first device, a second message to the second device, where the second message is used to request to add the second device as the secondary access network device of the terminal device in the first state.
Abstract:
Embodiments can provide an inter-cell handover method and a controller to shorten a handover delay. For achieving such, a target cell can be determined by a first controller of a source cell. The first controller can send a pre-handover request to a second controller, which may be a controller of the target cell. The pre-handover request can be configured for instructing the second controller to allocate a first resource for a cell handover to a terminal device. The first controller can send a handover command to the terminal device when the first controller determines that the terminal device meets a handover condition. The handover command can be configured for instructing the terminal device to be handed over from the source cell to the target cell based on the first resource.
Abstract:
Embodiments of the present invention provide a signal transmission method and apparatus, which can implement fast initial time synchronization. The method includes: generating, by a transmit-end device, an initial short training sequence, where the initial short training sequence includes M sub-sequences b, and the sub-sequence b includes N transmission sampling points; determining a quantity of reception sampling points used by a receive-end device when the receive-end device performs autocorrelation processing; generating a symbol sequence according to the quantity of the reception sampling points, and generating a target short training sequence according to the symbol sequence and the initial short training sequence; and sending a target signal to the receive-end device, where a short training sequence field of the target signal carries a short training sequence symbol, and the short training sequence symbol is used to indicate the target short training sequence.
Abstract:
The invention relates to techniques for controlling a dynamic hitless resizing in data transport networks. According to a method aspect of the invention, a network connection comprises M tributary slots defined in a payload area of a higher order transport scheme of the data transport network and the method comprises the steps of receiving a connection resize control signal at each of the nodes along the path of the network connection; adding at each node along the path in response to the connection resize control signal a second set of N tributary slots to the first set of the M tributary slots, such that the network connection comprises M+N tributary slots; and increasing, after M+N tributary slots are available for the network connection at each node along the path, a transport data rate of the network connection.
Abstract:
The present disclosure discloses a wireless communication method, user equipment, and an access network device. The method includes: when user equipment (UE) is to transmit an uplink first data flow, if the first data flow is a new data flow and the first data flow belongs to a service pre-authorized to the UE, sending, by the UE, a bearer setup request to an access network device; and receiving, by the UE, a bearer setup response sent by the access network device, where the bearer setup response includes a bearer identifier, and the bearer identifier is an identifier of a bearer that is set up.
Abstract:
A method for managing a resource object is disclosed. The method executed by a management system includes: adding a mapping relationship between a UUID of a newly discovered resource object and an FDN identifier of the newly discovered resource object to a resource object identifier mapping relationship table; receiving a first query request for a to-be-managed resource object that is sent by an application system, where the first query request is used to obtain an FDN identifier of the to-be-managed resource object; and returning the FDN identifier of the to-be-managed resource object to the application system. According to the method, the resource object in the SDN system can be managed by using the application system by slightly modifying a network management system in an existing network system and an application based on the network management system, thereby implementing smooth evolution of the existing network system to the SDN system.
Abstract:
Embodiments of the present invention provide a battery presence detecting apparatus, including: a detection triggering module, configured to detect a charging current on a battery terminal and trigger a logic control module when the charging current is less than a preset current threshold; the logic control module, configured to turn off a battery charging system and instruct a charging and discharging balancing module to perform a charging operation and then a discharging operation on the battery terminal; and a detection determining module, configured to detect a voltage on the battery terminal when the discharging operation is performed and determine whether the voltage on the battery terminal is less than a preset detection voltage, and if the voltage on the battery terminal is less than the preset detection voltage, determine that the battery is absent, and otherwise, determine that the battery is present.
Abstract:
This application relates to a UWB-based PPDU transmission method and a related apparatus. The method includes: Two communication parties exchange a PPDU. The PPDU includes a preamble sequence. The preamble sequence is obtained by inserting one or more 0s into a sequence in a sequence set. At least some sequences in the sequence set have a zero cross-correlation zone. According to embodiments of this application, anti-interference performance of a UWB system can be improved. This application is applied to a UWB-based wireless personal area network system, a sensing system, or the like, and includes 802.15 series protocols, such as an 802.15.4a protocol, an 802.15.4z protocol, or an 802.15.4ab protocol. This application may also support wireless local area network systems of 802.11 series protocols, such as a next-generation Wi-Fi protocol of 802.11ax, for example, 802.11be, that is, Wi-Fi 7 or EHT, or the next generation of 802.11be, that is, Wi-Fi 8.
Abstract:
A method comprises: a transmit end generates and sends a physical layer protocol data unit (PPDU), and a receive end receives the PPDU and parses the PPDU. An enhanced directional multi-gigabit (EDMG) modulation field in the PPDU includes a channel estimation field (CEF), the channel estimation field (CEF) includes a CEF sequence, and a length of the CEF sequence is m, where m is determined based on a quantity of bonding channels and a quantity of subcarriers included on a channel. According to this application, when a DFT-S-OFDM technology is introduced into a 60 GHz WLAN standard, an applied CEF sequence included in a channel estimation field can be determined, and DFT-S-OFDM transmission is further performed by using the CEF sequence. In this way, a PAPR of a WLAN system can be reduced while frequency division multiplexing for a plurality of users is supported.