354 results about "Data radio bearer" patented technology

The invention relates to a method for efficiently performing a Se NB change for a UE in dual connectivity. When reconfiguring a data radio bearer going via the Se NB to another target base station, the UE may compile a PDCP status report comprising status information for all of the data radio bearer going via the Se NB, accompanied respectively by a radio bearer ID to identify the radio bearer to which the status report information pertains. Further, the PDCP status report is directly transmitted by the UE to the Me NB to avoid the backhaul delay between the Se NB and the Me NB; this may be done by using a signaling radio bearer (e.g. RRC message), or data radio bearer to the Me NB (e.g. PDCP control PDU), or by using a physical channel transmission to the Me NB (e.g. MAC CE).

A method and an apparatus for transmitting a small size data packet efficiently while reducing signaling overhead in a mobile communication system are provided. The method includes determining to apply a low security transfer procedure, transmitting, to a base station, a Radio Resource Control (RRC) connection request message including a temporary Data Radio Bearer (DRB) request to which Access Stratum (AS) security is not applied, receiving an RRC connection setup message, including a temporary DRB configuration, from the base station, and transmitting an Internet Protocol (IP) packet over the temporary DRB.

The embodiments herein provide a method and system for creating a secure connection for a User Equipment (UE) in a wireless network including a UE, carrier aggregated with at least one first serving frequency served by a first eNB and at least one second serving frequency served by a second eNB. A unique non-repetitive security base key associated with the second eNB is generated using a freshness parameter and security key associated with the first eNB. The use of a different freshness parameter for each security base key derivation avoids key stream repetition. Further, a user plane encryption key is derived based on the generated unique non-repetitive security base key associated with the second eNB for encrypting data transfer over at least one data radio bearer.

An embodiment of the invention relates to the technical field of wireless communication, particularly to a wireless link recovery method and device and solves the conventional problem that under the dual connectivity network architecture, when failure occurs to the wireless link between UE (user equipment) and MeNB (master eNB), during the reconstruction of the wireless link, the break period of a data radio bearer is long. According to the arrangement, when the failure occurs to the wireless link of the MeNB, if serving cells of SeNB (secondary eNB) meet quality requirements of the channel, the UE performs a RRC (radio resource control) reconstruction by selecting one from the serving cells meeting the channel quality requirements rather than select the cell. Thus the wireless link recovery time is shortened, the break period of the data radio bearer is shortened, and the system performance is further improved.

The invention discloses a method for realizing data forwarding, and a donor base station. The method comprises the following steps of: in a handover process of user equipment (UE), when a forwarding path of a bearer which needs to perform the data forwarding relates a Un interface between the donor base station and a relay node, establishing one or more data radio bearers on the Un interface; establishing a one-to-one corresponding relation between the established data radio bearer and a general packet radio service tunneling protocol (GTP) tunnel on the forwarding path of the bearer which needs to perform the data forwarding; and performing forwarding on the bearer which needs to perform the data forwarding through the established data radio bearer and a corresponding GTP tunnel. The technical scheme of the invention can realize the data forwarding in the handover process of the UE when the forwarding path of the bearer which needs to perform the data forwarding relates to the Un interface.

Disclosed is a method of transmitting and receiving a small amount of uplink data. A method of transmitting uplink data includes detecting uplink data to be transmitted, determining whether or not uplink data transmission is necessary only once, transmitting a service request message including information instructing that a data radio bearer not be generated when it is determined that uplink data transmission is necessary only once, starting a radio resource control (RRC) connection setup process, and performing the uplink data transmission once using a signaling radio bearer without generating the data radio bearer with reference to the information instructing that the data radio bearer not be generated, during the RRC connection setup process, when it is determined that \ uplink data transmission is necessary only once.

A method of handling radio bearer resumption is illustrated in an exemplary embodiment of the present invention to prevent the transmission stall and the reception on the suspended signaling radio bearer and the suspended data radio bearers. First the wireless communication device receives the connection reconfiguration message including the handover message. Second the wireless communication device determines whether the received connection reconfiguration message including the handover message is the first received connection reconfiguration message including the handover message after a successful completion of a connection re-establishment procedure. Third, the wireless communication device resumes at least one of the suspended signaling radio bearer and the suspended data radio bearers when the received connection reconfiguration message including the handover message is the first received connection reconfiguration message including the handover message after the successful completion of the connection re-establishment procedure.

Provided are a data transmission method, user equipment and a base station. The data transmission method can comprises: UE receives auxiliary configuration information sent from PeNB and the auxiliary configuration information comprises information of a second DRB allocated by SeNB for the UE in SCell; the SeNB manages the SCell, and the SCell is a auxiliary zone of the UE; the UE binds a first EPS-Bearer and the second DRB, and before the first EPS-Bearer and the second DRB are bound, the first EPS-Bearer and a first DRB are bound, the first DRB carries out wireless bearing of data allocated by PeNB for the UE in PCell, the PeNB manages the PCell, the PCell is a main zone of the UE; the UE uses the second DRB bound with the first EPS-Bearer to transmit data flow.

The invention discloses a radio communication system and a method of resource configuration optimization during switching in a coordination set in the system, used for carrying out resource configuration optimization during switching in the coordination set. In the process of switching in a joint processing coordination set, when a target cell learns that a switched user is a coordinated user, the switched user is directly judged to be accessed and only a signalling radio bearer is established; after finishing the resource configuration, the target cell generates a radio resource control connection reconfiguration message comprising the signalling radio bearer and transmits the message to user equipment through a source cell; the user equipment carries out resource configuration, maintains a data radio bearer established in the coordinated process and establishes the signalling radio bearer. According to the invention, unnecessary steps are omitted, operations of repeated establishment and resource deletion are avoided and the efficiency of a terminal and a base station is improved.

A method for receiving a radio resource control (RRC) message by a user equipment (UE) is described. The method includes receiving, from a first evolved Node B (eNB), an RRC connection reconfiguration (RRCConnectionReconfiguration) message including data radio bearer (DRB) configuration parameters for remapping a DRB that is established on a master cell group (MCG) to a secondary cell group (SCG).

The invention discloses a method of building a radio bearer in a dual-connection network and a system, which relates to the technical field of radio communication. The problem of building a DRB (Data Radio Bearer) between a SeNB and UE in the dual-connection network by adopting a 3C frame can be solved. In certain trigger conditions, a MeNB can initiate a DRB building process between the SeNB and the UE, whether the MeNB carries out an EPS (Evolved Packet System) bearing shunt process and when the MeNB carries out the EPS bearing shunt process have no influence on core network processing, changes on the prior system are reduced maximally, the realization method is simple, advantages of the dual-connection technology are used thoroughly, and normal service transmission of the user can be ensured.

A method and apparatus for performing backoff in a wireless communication system is provided. A user equipment (UE) identifies a prioritized access, receives a backoff parameter from a network, and determines whether or not to apply the received backoff parameter according to the prioritized access. The prioritized access corresponds to one of emergency access, high priority access, control element/information in media access control (MAC), radio link control (RLC) or packet data convergence protocol (PDCP), data radio bearer (DRB) for voice/video service, signaling radio bearer (SRB) 0, SRB 1, SRB 2, multimedia telephony service (MMTEL)-voice, MMTEL-video, and voice over long-term evolution (VoLTE).

The invention discloses a transmission method and equipment of an IP data packet. The transmission method comprises the following steps: AP (Access Point) equipment acquires an IP data packet which needs to be sent to UE (User Equipment); the AP equipment determines a data radio bearer (DRB) corresponding to the IP data packet by using the type information of the IP data packet; and the AP equipment sends the IP data packet to the UE through the DRB. According to the embodiment of the invention, under the condition that the AP equipment is locally accessed into an IP network or accessed into the IP network directly through an IP gateway, the QoS (Quality of Service) guarantee of the IP data packet in idle transmission is achieved on the basis of direct mapping between the type information and the data radio bearer.

The present invention discloses a network connection method and system. The method includes: grouping a plurality of terminals, allocating group identities, and establishing a mapping relationship between the group identities and terminal identities; establishing a group-based signaling radio bearer and a group-based data radio bearer for each group; allocating, when a terminal in each group access a network, the terminal the group-based signaling radio bearer and group-based data radio bearer corresponding to the group to which the terminal belongs according to a mapping relationship between a group identities and a terminal identity, so that the terminals initiate network access by using the group-based signaling radio bearer and the group-based data radio bearer. The signaling overhead of establishing signaling connection and data bearer may be reduced though the technical solution of the present invention.

Apparatuses, methods, and systems are disclosed for indicating radio capability changes in an inactive state. One method includes detecting a trigger to change radio capabilities of a UE in an inactive state; transmitting a first message comprising information indicating to change the radio capabilities of the UE, wherein the first message comprises a first access stratum message; receiving a second message, wherein the second message comprises information corresponding to an action, and the second message comprises a second access stratum message; receiving a third message comprising information requesting the radio capabilities of the UE; transmitting a fourth message comprising the radio capabilities of the UE; and receiving a fifth message comprising information for configuring a radio resource control of the UE and activating data radio bearers of the UE, wherein the fifth message is determined based on the radio capabilities of the UE.

A method and apparatus for establishing/modifying/releasing data radio bearers (DRBs) in a wireless communication system is provided. A master eNodeB (MeNB) in dual connectivity transmits a request message, which includes information on E-UTRAN radio access bearers (E-RABs) to be set up/modified/released, to a secondary eNB (SeNB) in dual connectivity through an X2 interface;\, and receives a response message, which includes radio resource control (RRC) connection reconfiguration related information based on the E-RABs to be set up/modified/released, as a response to the request message from the SeNB through the X2 interface.

The present invention relates to a channel accessing method and device in a wireless communication system and, particularly, to a channel accessing method and device for a call handover for a terminal in a wireless communication system using a plurality of beams. The method according to an embodiment of the present invention, as a method of controlling a macro cell base station when a terminal that is communicating with the macro cell base station performs channel access with a small cell base station in a wireless network capable of using a plurality of transmitting/receiving beams, may include the steps of: determining whether to request a channel setting for a call for the terminal to the small cell base station when a signal strength measurement report for a channel synchronized with the small cell base station is received from the terminal; providing information including at least one of recommending information on the transmitting/receiving beams of the terminal and position information on the terminal in a request message to the small cell base station when a channel setting request to the small cell base station is decided upon; stopping the transmission of data to the terminal and a set data radio bearer (DRB2) when a response message for accepting the channel setting for the terminal is received from the small cell base station; transmitting a radio resource control access reconfiguration message to the terminal to communicate with the small cell base station; and providing information on data to be transmitted and received by the terminal to the small cell base station.

The embodiment of the invention discloses a data transmission method, and the method comprises the following steps that a first wireless network node reminds the bearing type of a downlink data packet; the first wireless network node transmits the downlink data packet to a second wireless network node under the condition that the bearing type is the signaling radio bearing SRB so that the second wireless network node performs the function of a grouped data aggregation protocol PDCP layer for the downlink data packet; or the first wireless network node performs a function of a PDCP layer for the downlink packet and transmits the processed downlink packet to the second radio network node under the condition that the bearing type is a data radio bearer DRB. Correspondingly, the embodiment of the present invention also discloses a wireless network node that can reduce transmission bandwidth and time delay requirements.

The invention discloses a data retransmission method and a data retransmission device. The method comprises the following steps of when a PDCP (Packet Data Convergence Protocol) is established, acquiring an RLC (Radio Link Control) mode of a DRB (Data Radio Bearer), and counting PDUs (Protocol Data Units) needing to be retransmitted; if the RLC mode of the current DRB is an acknowledge mode and the number of the PDUs needing to be retransmitted is greater than a set threshold value, reducing the retransmission rate, and sending the PDUs needing to be retransmitted according to the reduced retransmission rate. According to the method and the device, the data retransmission rate of the PDCP within a period of time in the early stage of data retransmission can be reduced, a state report sent by the PDCP of UE (User Equipment) is waited in the retransmission process, and data which truly need to be retransmitted are re-determined, so that waste of a great number of air interface resources caused by transmission of excess PDUs which are transmitted before reestablishment is avoided.

Disclosed herein are a method and an apparatus for transmitting and receiving, by a base station, data of remote user equipment (remote UE) through relay UE in a wireless communication system. According to the present invention, there may be provided a method for transmitting and receiving data through a relay including: receiving an S1 application protocol (S1AP) message for establishing an E-UTRAN radio access bearer (E-RAB) of the remote UE from a mobility management entity (MME), transmitting a first RRC message for establishing a data radio bearer (DRB) corresponding to the E-RAB to the relay UE, receiving a first RRC response message as a response to the first RRC message from the relay UE, and transmitting an S1AP response message as a response to an S1AP message to the MME if the first RRC response message includes a local identifier of the remote UE allocated by the base station, and an apparatus therefor.

The invention aims to provide a method, equipment and a system for transmission control on user equipment. The method includes: when the user equipment forms dual connectivity with a corresponding macro eNB and a small eNB, determining transmission status information corresponding to a DRB (data radio bearer) established with the user equipment through the user equipment, sending the transmission status information to the macro eNB, then determining transmission configuration information corresponding to the user equipment through the macro eNB according to the transmission status information, and performing transmission configuration on the user equipment according to the transmission configuration information. Compared with the prior art, the method, equipment and system has the advantages that on the basis of dual connectivity, PDU needing transmission or retransmission is acquired according to the transmission status information of the user equipment or the macro eNB performs traffic control on the user equipment according to transmission status information, so that connection establishment and switching of the user equipment, the macro eNB and the small eNB are guaranteed, reliability in data transmission is improved, efficiency of resource allocation of the system is improved, power consumption of the system is lowered and the like.

Provided are a method for establishing a data radio bearer (DRB) by a base station in a wireless communication system and an apparatus for supporting the same. The method may comprise the steps of: receiving, from an access and mobility function (AMF), quality of service (QoS) information for establishing a default DRB; and establishing the default DRB on the basis of the QoS information.

Aspects directed towards Quality of Service (QoS) flow remapping are disclosed. In an example, upon detecting a mapping reconfiguration of a first QoS flow from a first data radio bearer (DRB) to another DRB, a Service Data Adaptation Protocol (SDAP) control protocol data unit (PDU) is generated indicating that a final SDAP data PDU associated with the first QoS flow has been transmitted on the first DRB. The SDAP control PDU is then transmitted via the first DRB. In another example, upon detecting a mapping reconfiguration of a first QoS flow from a first DRB to another DRB, an end marker parameter is set in an SDAP header of a first SDAP data PDU received from an upper layer after the mapping reconfiguration indicating that the first SDAP data PDU is a final SDAP data PDU associated with the first QoS flow transmitted on the first DRB.