阅读说明：本技术 一种区分数据格式的方法及装置、通信设备 (Method and device for distinguishing data formats and communication equipment ) 是由 尤心 卢前溪 于 2019-02-02 设计创作，主要内容包括：本申请实施例提供一种区分数据格式的方法及装置、通信设备,包括：终端接收下行数据包,确定所述下行数据包的数据格式是第一数据格式还是第二数据格式,其中,所述第一数据格式是指所述下行数据包使用源基站的第一秘钥进行加密和/或使用源基站的第一头压缩格式进行压缩,所述第二数据格式是指所述下行数据包使用目标基站的第二秘钥进行加密和/或使用目标基站的第二头压缩格式进行压缩。(The embodiment of the application provides a method and a device for distinguishing data formats and communication equipment, and the method comprises the following steps: the terminal receives a downlink data packet and determines whether the data format of the downlink data packet is a first data format or a second data format, wherein the first data format refers to that the downlink data packet is encrypted by using a first secret key of a source base station and/or compressed by using a first header compression format of the source base station, and the second data format refers to that the downlink data packet is encrypted by using a second secret key of a target base station and/or compressed by using a second header compression format of the target base station.)

A method of distinguishing data formats, the method comprising:

the terminal receives a downlink data packet and determines whether the data format of the downlink data packet is a first data format or a second data format, wherein the first data format refers to that the downlink data packet is encrypted by using a first secret key of a source base station and/or compressed by using a first header compression format of the source base station, and the second data format refers to that the downlink data packet is encrypted by using a second secret key of a target base station and/or compressed by using a second header compression format of the target base station.

The method of claim 1, wherein the method further comprises:

if the downlink data packet is in the first data format, the terminal decrypts the downlink data packet by using the first secret key and/or decompresses the downlink data packet by using the first header compression format;

and if the downlink data packet is in the second data format, the terminal decrypts the downlink data packet by using the second secret key and/or decompresses the downlink data packet by using the second header compression format.

The method of claim 1 or 2, wherein the terminal determining whether the data format of the downlink data packet is a first data format or a second data format comprises:

and the terminal determines whether the data format of the downlink data packet is the first data format or the second data format through the first indication information.

The method of claim 3, wherein the first indication information is carried in a handover command, and the handover command is sent by the source base station to the terminal.

The method of claim 4, wherein the first indication information comprises at least a first sequence number of a Packet Data Convergence Protocol (PDCP) layer.

The method of claim 5, wherein,

if the sequence number of the downlink data packet received by the terminal is smaller than the first sequence number, the terminal determines that the data format of the downlink data packet is the first data format;

and if the sequence number of the downlink data packet received by the terminal is greater than the first sequence number, the terminal determines that the data format of the downlink data packet is the second data format.

The method of claim 6, wherein,

the source base station encrypts the downlink data packet before the first serial number by using the first secret key and/or compresses the downlink data packet by using the first header compression format, and then sends the downlink data packet to the terminal; alternatively, the first and second electrodes may be,

and the source base station encrypts the downlink data packet before the first serial number by using the first secret key and/or compresses the downlink data packet by using the first header compression format, forwards the downlink data packet to the target base station, and sends the downlink data packet to the terminal by using the target base station.

The method of claim 6, wherein,

the target base station encrypts the downlink data packet after the first sequence number by using the second secret key and/or compresses the downlink data packet by using the second header compression format, and then sends the downlink data packet to the terminal; alternatively, the first and second electrodes may be,

and after the downlink data packet after the first sequence number is encrypted by the target base station by using the second secret key and/or compressed by using the second header compression format, the downlink data packet is forwarded to the source base station and is sent to the terminal by the source base station.

The method of claim 3, wherein the first indication information is carried in a header of the downlink data packet, and the first indication information is carried in the header of the downlink data packet by a network side.

The method of claim 9, wherein the first indication information at least includes first bit information, and a value of the first bit information is used to indicate whether a data format of the downlink data packet is the first data format or the second data format.

The method according to claim 9 or 10, wherein the method further comprises:

the terminal determines an activation state or a deactivation state of the first indication information based on a first condition.

The method of claim 11, wherein the terminal determining the activation status of the first indication information based on a first condition comprises:

the terminal activates the first indication information when receiving a first RRC signaling, wherein the first RRC signaling is used for indicating the activation of the first indication information; alternatively, the first and second electrodes may be,

and when the terminal receives a switching command, activating the first indication information.

The method of claim 11, wherein the terminal determining the deactivation status of the first indication information based on a first condition comprises:

when the terminal receives a second RRC signaling, deactivating the first indication information, wherein the second RRC signaling is used for indicating to deactivate the first indication information; alternatively, the first and second electrodes may be,

and when the terminal completes the switching, deactivating the first indication information.

The method according to claim 3, wherein the first indication information is carried in a third RRC signaling, and the third RRC signaling is sent to the terminal by the source base station after sending a last downlink data packet to the terminal.

The method of claim 1 or 2, wherein the terminal determining whether the data format of the downlink data packet is a first data format or a second data format comprises:

and the terminal determines whether the data format of the downlink data packet is the first data format or the second data format through a Radio Link Control (RLC) entity corresponding to the downlink data packet.

The method of claim 15, wherein the downlink data packet of the source base station is carried by a first RLC entity of the terminal, and the downlink data packet of the target base station is carried by a second RLC entity of the terminal;

if the downlink data packet received by the terminal is loaded on a first RLC entity of the terminal, the terminal determines that the data format of the downlink data packet is the first data format;

and if the downlink data packet received by the terminal is carried in a second RLC entity of the terminal, the terminal determines that the data format of the downlink data packet is the second data format.

The method of claim 1 or 2, wherein the terminal determining whether the data format of the downlink data packet is a first data format or a second data format comprises:

and the terminal decrypts the downlink data packet by using the first key and the second key, and/or decompresses the downlink data packet by using the first header compression format and the second header compression format, and determines whether the data format of the downlink data packet is the first data format or the second data format based on a decryption result and/or a decompression result.

The method of claim 17, wherein the terminal decrypting the downstream data packet using the first key and the second key comprises:

the terminal decrypts the downlink data packet by using the first secret key, and then decrypts the downlink data packet by using the second secret key; alternatively, the first and second electrodes may be,

the terminal decrypts the downlink data packet by using the second secret key, and then decrypts the downlink data packet by using the first secret key; alternatively, the first and second electrodes may be,

and the terminal decrypts the downlink data packet by using the secret key which is used for successfully decrypting the previous downlink data packet, and then decrypts the downlink data packet by using the secret key which is used for not successfully decrypting the previous downlink data packet.

The method of claim 1 or 2, wherein the terminal determining whether the data format of the data packet is a first data format or a second data format comprises:

and the terminal determines whether the data format of the downlink data packet is the first data format or the second data format through a first end mark EM.

The method as claimed in claim 19, wherein the first EM represents a last downstream packet encrypted using the first secret key and/or compressed using the first header compression format.

The method of claim 20, wherein a sequence number of the downlink packet is carried in the first EM.

The method according to any one of claims 19 to 21, wherein the source base station forwards a downlink data packet to the target base station after receiving the second indication information; and after receiving the downlink data packet forwarded by the source base station, the target base station sends the downlink data packet to the terminal.

The method of claim 22, wherein the forwarding the downlink data packet to the target base station after the source base station receives the second indication information comprises:

after receiving the EM acknowledgement feedback message sent by the terminal, the source base station forwards a downlink data packet to the target base station; alternatively, the first and second electrodes may be,

after receiving a forwarding indication message sent by the target base station, the source base station forwards a downlink data packet to the target base station, wherein the forwarding indication message is sent to the source base station by the target base station after receiving an EM acknowledgement feedback message sent by the terminal;

wherein the EM acknowledgement feedback message is used to indicate that the first EM is correctly received by the terminal.

The method of claim 23, wherein the EM acknowledgement feedback message received by the source base station is carried on a non-offload bearer on the source base station side or an offload bearer on the source base station side.

The method of claim 23, wherein the EM acknowledgement feedback message received by the target base station is carried on a non-offload bearer on the target base station side or an offload bearer on the target base station side.

The method according to any of claims 19 to 21, wherein the source base station forwards downlink data packets to the target base station; and after receiving the downlink data packet forwarded by the source base station, the target base station caches the downlink data packet until receiving second indication information, and then sends the downlink data packet to the terminal.

The method of claim 26, wherein the sending the downlink data packet to the terminal after receiving the second indication information comprises:

after receiving the EM confirmation feedback message sent by the terminal, the target base station sends the downlink data packet to the terminal; alternatively, the first and second electrodes may be,

after receiving an issuing indication message sent by the source base station, the target base station sends the downlink data packet to the terminal, wherein the issuing indication message is sent to the target base station after the source base station receives an EM (effective message) confirmation feedback message sent by the terminal;

wherein the EM acknowledgement feedback message is used to indicate that the first EM is correctly received by the terminal.

The method of claim 27, wherein the EM acknowledgement feedback message received by the target base station is carried on a non-offload bearer on the target base station side or an offload bearer on the target base station side.

The method of claim 27, wherein the EM acknowledgement feedback message received by the source base station is carried on a non-split bearer on the source base station side or a split bearer on the source base station side.

The method of any one of claims 22 to 29, wherein the target base station transmitting the downlink data packet to the terminal comprises:

and the target base station encrypts the downlink data packet by using the second secret key and/or compresses the downlink data packet by using the second header compression format, and sends the downlink data packet with the second data format to the terminal.

The method according to any one of claims 22 to 30, wherein the forwarding of the downlink data packet to the target base station by the source base station comprises: the source base station does not send the downlink data packet of the terminal and/or the downlink data packet which is sent to the terminal by the source base station but is not correctly received by the terminal.

The method according to any of claims 1 to 31, wherein the downlink data packet is carried on a Signaling Radio Bearer (SRB) or a Data Radio Bearer (DRB).

A method of distinguishing data formats, the method comprising:

the network receives an uplink data packet and determines whether the data format of the uplink data packet is a first data format or a second data format, wherein the first data format refers to that the uplink data packet is encrypted by using a first secret key of a source base station and/or compressed by using a first header compression format of the source base station, and the second data format refers to that the uplink data packet is encrypted by using a second secret key of a target base station and/or compressed by using a second header compression format of the target base station.

The method of claim 33, wherein the method further comprises:

if the uplink data packet is in the first data format, the network decrypts the uplink data packet by using the first secret key and/or decompresses the uplink data packet by using the first header compression format;

if the upstream data packet is in the second data format, the network decrypts the upstream data packet using the second secret key and/or decompresses the upstream data packet using the second header compression format.

The method of claim 33 or 34, wherein the network determining whether the data format of the upstream data packet is a first data format or a second data format comprises:

the network determines whether the data format of the uplink data packet is the first data format or the second data format through first indication information.

The method of claim 35, wherein the first indication information is carried in a header of the uplink data packet, and the first indication information is carried in the header of the uplink data packet by the terminal.

The method of claim 36, wherein the first indication information at least includes first bit information, and a value of the first bit information is used to indicate whether a data format of the uplink data packet is the first data format or the second data format.

The method of claim 35, wherein the first indication information is carried in a fourth RRC signaling, and the fourth RRC signaling is sent to the target base station by the terminal after sending a last uplink data packet to the source base station.

The method of claim 38, wherein the first indication information is further used to indicate an identity of the target base station.

The method of claim 33 or 34, wherein the network determining whether the data format of the upstream data packet is a first data format or a second data format comprises:

and the network determines whether the data format of the uplink data packet is the first data format or the second data format through the RLC entity corresponding to the uplink data packet.

The method of claim 40, wherein the uplink data packet of the source base station is carried by a first RLC entity of the source base station, and the uplink data packet of the target base station is carried by a second RLC entity of the target base station;

if the uplink data packet received by the network is carried on a first RLC entity of the source base station, the network determines that the data format of the uplink data packet is the first data format;

and if the uplink data packet received by the network is carried on a second RLC entity of the target base station, the network determines that the data format of the uplink data packet is the second data format.

The method of claim 33 or 34, wherein the network determining whether the data format of the upstream data packet is a first data format or a second data format comprises:

the network decrypts the uplink data packet by using the first key and the second key, and/or decompresses the uplink data packet by using the first header compression format and the second header compression format, and determines whether the data format of the uplink data packet is the first data format or the second data format based on a decryption result and/or a decompression result.

The method of claim 42, wherein the network decrypting the upstream data packet using the first key and the second key comprises:

the network decrypts the uplink data packet by using the first secret key, and then decrypts the uplink data packet by using the second secret key; alternatively, the first and second electrodes may be,

the network decrypts the uplink data packet by using the second secret key, and then decrypts the uplink data packet by using the first secret key; alternatively, the first and second electrodes may be,

the network decrypts the uplink data packet by using the key for successfully decrypting the previous uplink data packet, and then decrypts the uplink data packet by using the key for unsuccessfully decrypting the previous uplink data packet.

The method of claim 33 or 34, wherein the network determining whether the data format of the upstream data packet is a first data format or a second data format comprises:

the network determines, by a second EM, whether a data format of the upstream packet is the first data format or the second data format.

A method as in claim 44, wherein the second EM represents a last upstream packet encrypted using the first secret key and/or compressed using the first header compression format.

The method of claim 45, wherein a sequence number of the upstream packet is carried in the second EM.

The method according to any one of claims 44 to 46, wherein after the terminal confirms that the second EM is correctly received by the network, the terminal encrypts the uplink data packet to be transmitted using the second secret key and/or compresses the uplink data packet to be transmitted using the second header compression format.

The method as claimed in claim 47, wherein after the terminal confirms that the second EM and all uplink data packets before the second EM are correctly received by the network, the terminal encrypts the uplink data packet to be transmitted using the second secret key and/or compresses the uplink data packet to be transmitted using the second header compression format.

The method of claim 47 or 48, wherein the terminal confirming correct receipt of the second EM by the network comprises:

the terminal receives an EM confirmation feedback message sent by the target base station; alternatively, the first and second electrodes may be,

the terminal receives an EM confirmation feedback message sent by the source base station;

wherein the EM acknowledgement feedback message is to indicate that the second EM was correctly received by the network.

The method of claim 49, wherein,

after receiving the second EM, the source base station sends an EM confirmation feedback message to the terminal and informs the network side of the target base station of receiving the second EM; alternatively, the first and second electrodes may be,

and after receiving the second EM, the source base station informs the target base station that the network side receives the second EM, and the target base station sends an EM acknowledgement feedback message to the terminal.

The method of any of claims 33 to 50, wherein the upstream data packets are carried on SRBs or DRBs.

An apparatus to distinguish data formats, the apparatus comprising:

a receiving unit, configured to receive a downlink data packet;

a determining unit, configured to determine whether a data format of the downlink data packet is a first data format or a second data format, where the first data format is that the downlink data packet is encrypted using a first secret key of a source base station and/or compressed using a first header compression format of the source base station, and the second data format is that the downlink data packet is encrypted using a second secret key of a target base station and/or compressed using a second header compression format of the target base station.

The apparatus of claim 52, wherein the apparatus further comprises:

an analysis unit, configured to decrypt the downlink data packet using the first key and/or decompress the downlink data packet using the first header compression format if the downlink data packet is in the first data format; and if the downlink data packet is in the second data format, decrypting the downlink data packet by using the second key and/or decompressing the downlink data packet by using the second header compression format.

The apparatus of claim 52 or 53, wherein the determining unit is configured to determine, through first indication information, whether the data format of the downlink data packet is the first data format or the second data format.

The apparatus of claim 54, wherein the first indication information is carried in a handover command, the handover command being sent by the source base station to the terminal.

The apparatus of claim 55, wherein the first indication information comprises at least a first sequence number of a PDCP layer.

The apparatus of claim 56, wherein,

if the sequence number of the downlink data packet received by the terminal is smaller than the first sequence number, the determining unit determines that the data format of the downlink data packet is the first data format;

if the sequence number of the downlink data packet received by the terminal is greater than the first sequence number, the determining unit determines that the data format of the downlink data packet is the second data format.

The apparatus of claim 57, wherein,

the source base station encrypts the downlink data packet before the first serial number by using the first secret key and/or compresses the downlink data packet by using the first header compression format, and then sends the downlink data packet to the terminal; alternatively, the first and second electrodes may be,

and the source base station encrypts the downlink data packet before the first serial number by using the first secret key and/or compresses the downlink data packet by using the first header compression format, forwards the downlink data packet to the target base station, and sends the downlink data packet to the terminal by using the target base station.

The apparatus of claim 57, wherein,

the target base station encrypts the downlink data packet after the first sequence number by using the second secret key and/or compresses the downlink data packet by using the second header compression format, and then sends the downlink data packet to the terminal; alternatively, the first and second electrodes may be,

and after the downlink data packet after the first sequence number is encrypted by the target base station by using the second secret key and/or compressed by using the second header compression format, the downlink data packet is forwarded to the source base station and is sent to the terminal by the source base station.

The apparatus of claim 54, wherein the first indication information is carried in a header of the downlink data packet, and the first indication information is carried in the header of the downlink data packet by a network side.

The apparatus of claim 60, wherein the first indication information at least includes first bit information, and a value of the first bit information is used to indicate whether a data format of the downlink data packet is the first data format or the second data format.

The apparatus of claim 60 or 61, wherein the determining unit is further configured to determine an activation status or a deactivation status of the first indication information based on a first condition.

The apparatus of claim 62, wherein the apparatus further comprises:

an activating unit, configured to activate the first indication information when receiving a first RRC signaling, where the first RRC signaling is used to indicate to activate the first indication information; or, when receiving a switching command, activating the first indication information.

The apparatus of claim 62, wherein the apparatus further comprises:

a deactivating unit, configured to deactivate the first indication information when receiving a second RRC signaling, where the second RRC signaling is used to indicate that the first indication information is deactivated; or, when the handover is completed, deactivating the first indication information.

The apparatus of claim 54, wherein the first indication information is carried in a third RRC signaling, and the third RRC signaling is sent to the terminal by the source base station after the last downlink data packet is sent to the terminal.

The apparatus of claim 52 or 53, wherein the determining unit is configured to determine whether the data format of the downlink data packet is the first data format or the second data format through an RLC entity to which the downlink data packet corresponds.

The apparatus of claim 66, wherein downlink data packets of the source base station are carried by a first RLC entity of the terminal, and downlink data packets of the target base station are carried by a second RLC entity of the terminal;

if the downlink data packet received by the receiving unit is carried on a first RLC entity of the terminal, the determining unit determines that the data format of the downlink data packet is the first data format;

if the downlink data packet received by the receiving unit is carried on a second RLC entity of the terminal, the determining unit determines that the data format of the downlink data packet is the second data format.

The apparatus of claim 52 or 53, wherein the apparatus further comprises:

an analysis unit, configured to decrypt the downlink data packet using the first key and the second key, and/or decompress the downlink data packet using the first header compression format and the second header compression format;

the determining unit is configured to determine whether the data format of the downlink data packet is the first data format or the second data format based on the decryption result and/or the decompression result.

The apparatus of claim 68, wherein the parsing unit is configured to:

decrypting the downlink data packet by using the first secret key, and decrypting the downlink data packet by using the second secret key; alternatively, the first and second electrodes may be,

decrypting the downlink data packet by using the second secret key, and decrypting the downlink data packet by using the first secret key; alternatively, the first and second electrodes may be,

the method comprises the steps of firstly decrypting a downlink data packet by using a secret key for successfully decrypting a previous downlink data packet, and then decrypting the downlink data packet by using a secret key for unsuccessfully decrypting the previous downlink data packet.

The apparatus of claim 52 or 53, wherein the determining unit is configured to determine, by the first EM, whether the data format of the downlink data packet is the first data format or the second data format.

The apparatus as claimed in claim 70, wherein the first EM represents a last downstream packet encrypted using the first secret key and/or compressed using the first header compression format.

The apparatus of claim 71, wherein a sequence number of the downlink packet is carried in the first EM.

The apparatus according to any one of claims 70 to 72, wherein the source base station forwards a downlink data packet to the target base station after receiving the second indication information; and after receiving the downlink data packet forwarded by the source base station, the target base station sends the downlink data packet to the terminal.

The apparatus of claim 73, wherein the source base station forwards the downlink data packet to the target base station after receiving the second indication information, comprising:

after receiving the EM acknowledgement feedback message sent by the terminal, the source base station forwards a downlink data packet to the target base station; alternatively, the first and second electrodes may be,

after receiving a forwarding indication message sent by the target base station, the source base station forwards a downlink data packet to the target base station, wherein the forwarding indication message is sent to the source base station by the target base station after receiving an EM acknowledgement feedback message sent by the terminal;

wherein the EM acknowledgement feedback message is used to indicate that the first EM is correctly received by the terminal.

The apparatus of claim 74, wherein the EM acknowledgement feedback message received by the source base station is carried on a non-offload bearer on the source base station side or an offload bearer on the source base station side.

The apparatus of claim 74, wherein the EM acknowledgement feedback message received by the target base station is carried on a non-offload bearer on the target base station side or an offload bearer on the target base station side.

The apparatus of any one of claims 70 to 72, wherein the source base station forwards a downlink data packet to the target base station; and after receiving the downlink data packet forwarded by the source base station, the target base station caches the downlink data packet until receiving second indication information, and then sends the downlink data packet to the terminal.

The apparatus of claim 77, wherein the sending the downlink data packet to the terminal after receiving the second indication information comprises:

after receiving the EM confirmation feedback message sent by the terminal, the target base station sends the downlink data packet to the terminal; alternatively, the first and second electrodes may be,

after receiving an issuing indication message sent by the source base station, the target base station sends the downlink data packet to the terminal, wherein the issuing indication message is sent to the target base station after the source base station receives an EM (effective message) confirmation feedback message sent by the terminal;

wherein the EM acknowledgement feedback message is used to indicate that the first EM is correctly received by the terminal.

The apparatus of claim 78, wherein the EM acknowledgement feedback message received by the target base station is carried on a non-offload bearer on the target base station side or an offload bearer on the target base station side.

The apparatus of claim 78, wherein the EM acknowledgement feedback message received by the source base station is carried on a non-offload bearer on the source base station side or an offload bearer on the source base station side.

The apparatus of any one of claims 73 to 80, wherein the target base station transmitting the downlink data packet to the terminal comprises:

and the target base station encrypts the downlink data packet by using the second secret key and/or compresses the downlink data packet by using the second header compression format, and sends the downlink data packet with the second data format to the terminal.

The apparatus of any one of claims 73 to 81, wherein the downlink data packet forwarded by the source base station to the target base station comprises: the source base station does not send the downlink data packet of the terminal and/or the downlink data packet which is sent to the terminal by the source base station but is not correctly received by the terminal.

The apparatus of any one of claims 52 to 82, wherein the downlink data packet is carried on an SRB or a Data Radio Bearer (DRB).

An apparatus to distinguish data formats, the apparatus comprising:

a receiving unit, configured to receive an uplink data packet;

a determining unit, configured to determine whether a data format of the uplink data packet is a first data format or a second data format, where the first data format is that the uplink data packet is encrypted using a first secret key of a source base station and/or compressed using a first header compression format of the source base station, and the second data format is that the uplink data packet is encrypted using a second secret key of a target base station and/or compressed using a second header compression format of the target base station.

The apparatus of claim 84, wherein the apparatus further comprises:

an analysis unit, configured to decrypt the uplink data packet using the first key and/or decompress the uplink data packet using the first header compression format if the uplink data packet is in the first data format; and if the uplink data packet is in the second data format, decrypting the uplink data packet by using the second key and/or decompressing the uplink data packet by using the second header compression format.

The apparatus of claim 84 or 85, wherein the determining unit is configured to determine, through first indication information, whether the data format of the uplink data packet is the first data format or the second data format.

The apparatus of claim 86, wherein the first indication information is carried in a header of the uplink data packet, and the first indication information is carried by the terminal in the header of the uplink data packet.

The apparatus of claim 87, wherein the first indication information at least includes first bit information, and a value of the first bit information is used to indicate whether a data format of the uplink data packet is the first data format or the second data format.

The apparatus of claim 86, wherein the first indication information is carried in a fourth RRC signaling, and the fourth RRC signaling is sent to the target base station by the terminal after sending a last uplink data packet to the source base station.

The apparatus of claim 89, wherein the first indication information is further for indicating an identity of the target base station.

The apparatus of claim 84 or 85, wherein the determining unit is configured to determine whether the data format of the uplink data packet is the first data format or the second data format through an RLC entity to which the uplink data packet corresponds.

The apparatus of claim 91, wherein the uplink data packet of the source base station is carried by a first RLC entity of the source base station, and the uplink data packet of the target base station is carried by a second RLC entity of the target base station;

if the uplink data packet received by the receiving unit is carried on a first RLC entity of the source base station, the determining unit determines that the data format of the uplink data packet is the first data format;

if the uplink data packet received by the receiving unit is carried on a second RLC entity of the target base station, the determining unit determines that the data format of the uplink data packet is the second data format.

The apparatus of claim 84 or 85, wherein the apparatus further comprises:

an analysis unit, configured to decrypt the uplink data packet using the first key and the second key, and/or decompress the uplink data packet using the first header compression format and the second header compression format;

the determining unit is configured to determine whether the data format of the uplink data packet is the first data format or the second data format based on the decryption result and/or the decompression result.

The apparatus of claim 93, wherein the parsing unit is configured to:

decrypting the uplink data packet by using the first secret key, and decrypting the uplink data packet by using the second secret key; alternatively, the first and second electrodes may be,

decrypting the uplink data packet by using the second secret key, and decrypting the uplink data packet by using the first secret key; alternatively, the first and second electrodes may be,

and decrypting the uplink data packet by using the key which is used for successfully decrypting the previous uplink data packet, and decrypting the uplink data packet by using the key which is not used for successfully decrypting the previous uplink data packet.

The apparatus of claim 84 or 85, wherein the determining unit is configured to determine, by a second EM, whether a data format of the upstream data packet is the first data format or the second data format.

The apparatus as claimed in claim 95, wherein the second EM represents a last upstream packet encrypted using the first secret key and/or compressed using the first header compression format.

The apparatus of claim 96, wherein a sequence number of the upstream packet is carried in the second EM.

The apparatus according to any one of claims 95 to 97, wherein after confirming that the second EM is correctly received by the network, the terminal encrypts the uplink data packet to be transmitted using the second secret key and/or compresses the uplink data packet to be transmitted using the second header compression format.

The apparatus of claim 98, wherein after the terminal determines that the second EM and all uplink data packets before the second EM are correctly received by the network, the terminal encrypts the uplink data packet to be transmitted using the second secret key and/or compresses the uplink data packet to be transmitted using the second header compression format.

The apparatus of claim 98 or 99, wherein the terminal confirming correct receipt of the second EM by the network comprises:

the terminal receives an EM confirmation feedback message sent by the target base station; alternatively, the first and second electrodes may be,

the terminal receives an EM confirmation feedback message sent by the source base station;

wherein the EM acknowledgement feedback message is to indicate that the second EM was correctly received by the network.

The apparatus of claim 100, wherein,

after receiving the second EM, the source base station sends an EM confirmation feedback message to the terminal and informs the network side of the target base station of receiving the second EM; alternatively, the first and second electrodes may be,

and after receiving the second EM, the source base station informs the target base station that the network side receives the second EM, and the target base station sends an EM acknowledgement feedback message to the terminal.

The apparatus of any one of claims 84 to 101, wherein the upstream data packet is carried on an SRB or a DRB.

A communication device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory, to perform the method of any of claims 1 to 32, or to perform the method of any of claims 33 to 51.

A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any of claims 1 to 32, or the method of any of claims 33 to 51.

A computer readable storage medium storing a computer program for causing a computer to perform the method of any of claims 1 to 32 or the method of any of claims 33 to 51.

A computer program product comprising computer program instructions to cause a computer to perform the method of any of claims 1 to 32, or the method of any of claims 33 to 51.

A computer program for causing a computer to perform the method of any one of claims 1 to 32, or the method of any one of claims 33 to 51.