Abstract:
Embodiments of the present invention provide a communication method used for random access, including: receiving, by a terminal, random access preamble information sent by a base station; and before sending random access to the base station based on the random access preamble information, receiving, by the terminal, a random access response sent by the base station, where the random access response includes an uplink asynchronous hybrid automatic repeat request HARQ process identifier, and the uplink asynchronous HARQ process identifier is used by the terminal to send uplink data to the base station. Compared with the prior art, the communication method provided in the embodiments of the present invention can ensure to some extent that uplink data is transmitted timely and can effectively improve uplink data transmission reliability.
Abstract:
Embodiments of the present disclosure provide a communication method and a communications device. The method includes: generating, by a first communications device, a MAC PDU data packet, where the MAC PDU data packet includes at least one first-type MAC CE, each first-type MAC CE is used to carry information about multiple secondary serving cells, and the first communications device determines a location of the first-type MAC CE in the MAC PDU data packet according to a secondary serving cell corresponding to the first-type MAC CE; and sending, by the first communications device, the MAC PDU data packet to a second communications device, so that the second communications device obtains the first-type MAC CE, and determines, according to the location of the first-type MAC CE in the MAC PDU data packet, the secondary serving cell corresponding to the first-type MAC CE.
Abstract:
A handover apparatus and method, where the handover method includes receiving, by a target primary base station, a handover request from a source primary base station, where the handover request includes first configuration information of a source secondary base station, and the source primary base station and the source secondary base station jointly provide services for user equipment, sending, by the target primary base station, a first indication to the source secondary base station, where the first indication instructs the source secondary base station to remain unchanged, and sending, by the target primary base station, a handover acknowledgement to the source primary base station.
Abstract:
A method of distributing a security key context, where the method includes receiving, by a mobility management entity, a first indication from a primary base station, where the first indication is used for requesting a path switch from the mobility management entity and indicating that the path switch is triggered by carrier aggregation between base stations, processing the path switch according to the first indication, and keeping, according to the first indication, the security key context for the path switch unchanged, and sending a second indication to the primary base station, to indicate the primary base station to keep the security key context unchanged, or sending a third indication to the primary base station, to indicate the primary base station to acquire a quantity of times of reversal of a next hop chaining counter in the security key context.
Abstract:
The present invention provides a method for determining a rank indication (RI) bit number, a base station, and a terminal. The method includes: determining, by a base station, indication information according to a correspondence between a terminal and the base station and a multi-input multi-output (MIMO) capability of the terminal, where the indication information includes information used by the terminal for determining a bit number occupied for sending a RI; and sending, by the base station, the indication information to the terminal, so that the terminal determines, according to the indication information, the bit number occupied for sending the RI. In the present invention, the UE and the base station agree or understanding of the bit number occupied by RI information.
Abstract:
Embodiments of the present invention provide a method which includes: first, receiving, by user equipment UE, a first scheduling time sent by a base station, where the first scheduling time is a time used by the UE to use the unlicensed spectrum based on a wireless cellular network and/or a time used by the UE to use the unlicensed spectrum based on a non-wireless cellular network; next, receiving, by the UE, an indication sent by the base station, where the indication is used to indicate that the base station has obtained the unlicensed spectrum, or indicate an offset time of the first scheduling time; and finally, obtaining, by the UE, a second scheduling time according to the indication and the first scheduling time, to use the unlicensed spectrum according to the second scheduling time based on the wireless cellular network and/or the non-wireless cellular network.
Abstract:
Embodiments of the present invention provide a method and system for contending for a channel of an unlicensed frequency band, and an apparatus. The method for contending for a channel of an unlicensed frequency band in the present invention includes: acquiring, according to contention timeslot configuration information, a condition for starting a contention timeslot, and starting the contention timeslot when the condition is met, where the contention timeslot configuration information includes at least one of the following configurations: a time configuration of the contention timeslot, a contention backoff time, a terminal feedback uplink configuration, or a channel available condition; and performing a corresponding operation within the contention timeslot according to the time configuration of the contention timeslot to contend for a channel of an unlicensed frequency band, so as to implement data transmission on the unlicensed frequency band.
Abstract:
The present invention discloses a method for accessing s network system, including the following steps: receiving, by a first network device of a first network system, a measurement report of a second network system sent by a user equipment of the first network system; determining, by the first network device, a second network device in the second network system according to the measurement report; and sending, by the first network device, a bearer setup request to the second network device, for enabling the second network device to set up a connection with the user equipment. The present invention, by realizing aggregation between a two network systems, may dynamically schedule the resources of the two network systems according to loads of the two network systems, thereby provides load balancing with extremely high efficiency, and is capable of increase the peak data rate of the user effectively and remarkably.
Abstract:
A communication method includes: acquiring a wireless network temporary identifier used for device to device communication; receiving transmission grant information scrambled through the wireless network temporary identifier used for the device to device communication; and performing the device to device communication according to descrambled transmission grant information. A terminal may realize the D2D communication according to the wireless network temporary identifier used for performing the device to device communication and the transmission grant information by sending, to the terminal, the wireless network temporary identifier used for performing the device to device communication and the transmission grant information, thereby satisfying a requirement of D2D data transmission between terminals.
Abstract:
The present invention provides a method for determining a rank indication (RI) bit number, a base station, and a terminal. The method includes: determining, by a base station, indication information according to a correspondence between a terminal and the base station and a multi-input multi-output (MIMO) capability of the terminal, where the indication information includes information used by the terminal for determining a bit number occupied for sending a RI; and sending, by the base station, the indication information to the terminal, so that the terminal determines, according to the indication information, the bit number occupied for sending the RI. In the present invention, the UE and the base station agree on understanding of the bit number occupied by RI information.