CN111654360B - Non-active state switching processing method and communication equipment - Google Patents
Non-active state switching processing method and communication equipment Download PDFInfo
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- CN111654360B CN111654360B CN201910161166.4A CN201910161166A CN111654360B CN 111654360 B CN111654360 B CN 111654360B CN 201910161166 A CN201910161166 A CN 201910161166A CN 111654360 B CN111654360 B CN 111654360B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
Abstract
The invention provides a non-active state switching processing method and communication equipment, belonging to the technical field of wireless communication, wherein the method applied to first communication equipment comprises the following steps: the PDCP layer receives first INACTIVE indication information sent by an upper layer; the PDCP layer executes a first INACTIVE operation according to the first INACTIVE instruction information; the PDCP layer receives and stores data transmitted from an upper layer after performing a first INACTIVE operation, and does not transmit to a lower layer. In the embodiment of the invention, the functions of the PDCP layer of the data transmitting end and the data receiving end in the RRC_INACTIVE state and the operations required to be executed by the PDCP layer and the RLC layer when switching to the RRC_INACTIVE state are definitely defined.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method for processing handover in an inactive state and a communication device.
Background
The 5G (fifth generation mobile communication technology) introduced an rrc_inactive (RRC, radio Resource Control, radio resource control; INACTIVE, INACTIVE) state. In this state, the connection between the UE (User Equipment) and the 5GC (5G Core Network) -NG-RAN (5G radio Access network) maintains a connection state, and the NG-RAN and the UE exist in the AS (Access layer) upper and lower Wen Bao of the UE, which can be referred to specifically AS follows:
RRC_INACTIVE:
-PLMN selection；
-Broadcast of system information；
-Cell re-selection mobility；
-Paging is initiated by NG-RAN(RAN paging)；
-RAN-based notification area(RNA)is managed by NG-RAN；
-DRX for RAN paging configured by NG-RAN；
-5GC-NG-RAN connection(both C/U-planes)is established for UE；
-The UE AS context is stored in NG-RAN and the UE；
-NG-RAN knows the RNA which the UE belongs to.
Meanwhile, the uplink out-of-step operation in 4G (fourth generation mobile communication technology) is still reserved in 5G. In the uplink out-of-step state, an RB (Radio Bearer) of the UE has been established, but the link of the lower layer air interface is not opened.
Because a connection between 5 GC-NG-RANs (NG interfaces) exists in the rrc_inactive state, PDCP (Packet Data Convergence Protocol, packet data convergence protocol layer) needs to be able to correctly store data through NG interfaces or directly to NG-RANs or UEs' local sites when there is data at a higher layer of 5GC or UEs to transmit. However, since the function of PDCP in the rrc_inactive state is not defined in the current protocol, data in this state cannot be stored.
Disclosure of Invention
In view of the above, the present invention provides a handover processing method in an INACTIVE state and a communication device, which are used for solving the problem that the PDCP layer in the rrc_inactive state is not explicitly defined in the current protocol.
To solve the above technical problem, in a first aspect, the present invention provides a method for processing handover in an inactive state, which is applied to a first communication device, and includes:
the PDCP layer receives first INACTIVE indication information sent by an upper layer;
the PDCP layer executes a first INACTIVE operation according to the first INACTIVE instruction information;
The PDCP layer receives and stores data transmitted from an upper layer after performing the first INACTIVE operation, and does not transmit to a lower layer.
Preferably, the first INACTIVE operation includes modifying configuration parameters of the RB so that the PDCP layer can save data received from an upper layer.
Preferably, the first INACTIVE operation includes a first operation, and the first operation includes at least one of the following:
the PDCP layer transmits all generated PDCP PDUs to a lower layer;
the PDCP layer transmits all PDCP SDUs received to a lower layer to generate PDCP PDUs.
Preferably, the first INACTIVE operation further includes a second operation, the second operation being located after the first operation;
the second operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters related to the sent data of the PDCP layer to initial values;
the PDCP layer resets the parameters of all algorithms of the layer to initial values.
Preferably, the step of receiving and storing data transmitted by an upper layer after the PDCP layer performs the first INACTIVE operation includes:
the PDCP layer holds the received data and does not start a data discard timer.
Preferably, after the step of receiving the first INACTIVE indication information sent by the upper layer, the PDCP layer further includes:
the PDCP layer sends second INACTIVE instruction information to the lower layer according to the first INACTIVE instruction information, wherein the second INACTIVE instruction information is used for instructing the lower layer to execute INACTIVE operation.
Preferably, the method further comprises:
the RLC layer receives second INACTIVE instruction information sent by an upper layer;
and the RLC layer executes a second INACTIVE operation according to the second INACTIVE instruction information.
Preferably, the step of the RLC layer performing the second INACTIVE operation according to the second INACTIVE indication information includes:
the RLC layer transmits all valid data which can be transmitted to a lower layer.
Preferably, after the step of the RLC layer transmitting all the valid data which can be transmitted to the lower layer, the RLC layer further includes:
the RLC layer resets all parameters related to the transmission window of the layer to initial values.
Preferably, after the step of performing the second INACTIVE operation by the RLC layer according to the second INACTIVE indication information, the RLC layer further includes:
the RLC layer feeds back first indication information to the PDCP layer, wherein the first indication information is used for indicating that the RLC layer has completed INACTIVE operation;
The PDCP layer receives the first indication information and feeds back second indication information to an upper layer according to the first indication information, wherein the second indication information is used for indicating that the PDCP layer and/or a lower layer of the PDCP layer has completed an INACTIVE operation.
In a second aspect, the present invention further provides a method for processing handover in an inactive state, which is applied to a second communication device, and includes:
the PDCP layer receives third INACTIVE indication information sent by an upper layer;
the PDCP layer executes a third INACTIVE operation according to the third INACTIVE instruction information;
after the PDCP layer performs the third INACTIVE operation, it stops receiving any data.
Preferably, after the step of performing the third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information, the PDCP layer further includes:
the PDCP layer sends fourth INACTIVE instruction information to the lower layer according to the third INACTIVE instruction information, wherein the fourth INACTIVE instruction information is used for instructing the lower layer to execute INACTIVE operation.
Preferably, before the step of performing the third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information, the PDCP layer further includes:
the RLC layer receives fourth INACTIVE instruction information sent by an upper layer;
And the RLC layer executes a fourth INACTIVE operation according to the fourth INACTIVE instruction information.
Preferably, the fourth INACTIVE operation includes a third operation, where the third operation includes reorganizing all valid data capable of reorganizing, and delivering to an upper layer.
Preferably, the fourth INACTIVE operation further includes a fourth operation, the fourth operation being located after the third operation;
the fourth operation includes at least one of:
resetting all parameters related to a receiving window in the RLC layer to initial values;
and resetting all parameters related to ARQ in the RLC layer to initial values.
Preferably, after the step of the RLC layer performing the fourth INACTIVE operation according to the fourth INACTIVE indication information, the RLC layer further includes:
the RLC layer transmits third indication information to the PDCP layer, the third indication information being used to indicate that the RLC layer has completed an INACTIVE operation.
Preferably, the third INACTIVE operation includes a fifth operation,
the step of the PDCP layer executing a third INACTIVE operation according to the third INACTIVE indication information includes:
the PDCP layer performs a fifth operation after receiving third indication information of a lower layer indicating that an INACTIVE operation has been completed, the fifth operation including at least one of:
The PDCP layer reorganizes and receives the PDCP PDU in the cache, analyzes the PDCP SDU and delivers the PDCP PDU to the upper layer according to the sequence;
the PDCP layer discards data that cannot be reassembled.
Preferably, the third INACTIVE operation further includes a sixth operation, the sixth operation being located after the fifth operation;
the sixth operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters related to the received data of the PDCP layer to initial values;
the PDCP layer resets the parameters of all algorithms of the layer to initial values.
Preferably, after the step of performing the third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information, the PDCP layer further includes:
the PDCP layer feeds back fourth indication information to an upper layer, the fourth indication information being used to indicate that the PDCP layer has completed an INACTIVE operation.
In a third aspect, the present invention also provides a first communication device comprising:
a first receiving module, configured to receive, by a PDCP layer, first INACTIVE indication information sent by an upper layer;
a first execution module, configured to execute a first INACTIVE operation by the PDCP layer according to the first INACTIVE indication information;
And a saving module, configured to receive and save data sent by an upper layer after the PDCP layer performs the first INACTIVE operation, and not send the data to a lower layer.
In a fourth aspect, the present invention also provides a second communication device, including:
a second receiving module, configured to receive, by the PDCP layer, third INACTIVE indication information sent by an upper layer;
a second execution module, configured to execute a third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information;
and a third receiving module, configured to stop receiving any data after the PDCP layer performs the third INACTIVE operation.
In a fifth aspect, the present invention also provides a communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor; the processor implements any one of the inactive state switching processing methods described above when executing the computer program.
In a sixth aspect, the present invention also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of any of the above-mentioned inactive state switching processing methods.
The technical scheme of the invention has the following beneficial effects:
In the embodiment of the present invention, the function of the PDCP layer of the data transmitting end in the rrc_inactive state is definitely defined, and after the PDCP layer performs the first INACTIVE operation according to the first INACTIVE indication information sent by the upper layer, that is, after entering the rrc_inactive, the PDCP layer receives and stores the data sent by the upper layer, but does not send the data to the lower layer (at this time, the air interface cannot perform data transmission and reception). Since the PDCP layer can receive and store data transmitted from an upper layer in an rrc_inactive state, if rrc_connected is subsequently entered and data is required to be transmitted to the second communication device through an air interface, it is not required to acquire data from the upper layer, even from a core network, and the PDCP layer can directly acquire data, thereby speeding up data transmission. In addition, the embodiment of the invention has simple mode of realizing the data storage in the PDCP layer. The embodiment of the invention also explicitly defines the function of the PDCP layer of the data receiving end in the RRC_INACTIVE state, namely stopping receiving any data.
Drawings
Fig. 1 is a flow chart of a non-active switching method according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of PDCP layer functions of a first communication device and a second communication device in an rrc_inactive state according to an embodiment of the present invention;
FIG. 3 is a flow chart of a non-active switching method according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first communication device in a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second communication device in a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a first communication device in a fifth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a second communication device in a sixth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Referring to fig. 1, fig. 1 is a flowchart of an inactive state switching processing method according to an embodiment of the present invention, where the method is applied to a first communication device, and the first communication device is used as a data transmitting end, and includes the following steps:
Step 11: the PDCP layer receives first INACTIVE instruction information sent by an upper layer (upper layers);
step 12: the PDCP layer executes a first INACTIVE operation according to the first INACTIVE instruction information;
step 13: the PDCP layer receives and stores data transmitted from an upper layer after performing the first INACTIVE operation, and does not transmit to a lower layer.
The first communication device may be a network side device, for example, a base station, or a terminal. The first INACTIVE indication information may be specifically sent by the RRC layer. In the rrc_inactive state, the PDCP layer function of the first communication device is as shown in fig. 2.
Optionally, the data of the upper layer is mapped to the RBs of the PDCP through the QoS flow (Quality of Service flow ) of the SDAP (Service Data Adaption Protocol, traffic data adaptation protocol layer), but the RBs of the PDCP do not perform logical channel mapping, so that the PDCP can correctly store the received data packet (i.e., PDCP SDU (Service data unit, traffic data unit)).
In the embodiment of the present invention, the function of the PDCP layer of the data transmitting end in the rrc_inactive state is definitely defined, and after the PDCP layer performs the first INACTIVE operation according to the first INACTIVE indication information sent by the upper layer, that is, after entering the rrc_inactive, the PDCP layer receives and stores the data sent by the upper layer, but does not send the data to the lower layer (at this time, the air interface cannot perform data transmission and reception). Since the PDCP layer can receive and store data transmitted from an upper layer in an rrc_inactive state, if rrc_connected is subsequently entered and data is required to be transmitted to the second communication device through an air interface, it is not required to acquire data from the upper layer, even from a core network, and the PDCP layer can directly acquire data, thereby speeding up data transmission. In addition, the embodiment of the invention has simple mode of realizing the data storage in the PDCP layer.
The following illustrates the above-described inactive state switching processing method.
In the embodiment of the present invention, the PDCP layer needs to have a function of storing and maintaining data, that is, to receive and store data sent by an upper layer in a data format of PDCP SDUs, and to ensure that the data is stored in sequence according to a data packet received. In addition, if the storage time of the PDCP SDU is too long, the PDCP SDU is considered to be invalid, and therefore the PDCP SDU is discarded.
Optionally, the first INACTIVE operation includes modifying configuration parameters of the RB to enable the PDCP layer to save data received from an upper layer. That is, after receiving the first INACTIVE indication information sent by the upper layer, the PDCP layer performs RB reconfiguration. The configuration parameters of the RB include an ID (Identifier or number) of the RB itself, an ID of a corresponding receiving end (e.g., terminal), an ID of QoS flow, and the like.
Optionally, the first INACTIVE operation includes a first operation, where the first operation includes at least one of:
the PDCP layer transmits all PDCP PDUs which have been generated to a lower layer, including AM (acknowledged mode) DRB (Data Radio Bearer, data bearer)/SRB (Signal Radio Bearer, signaling bearer) and UM (unacknowledged mode) DRB;
The PDCP layer transmits all the PDCP SDUs that have been received to lower layers including AM DRB/SRB and UM DRB to generate PDCP PDUs (Protocol data unit, protocol data units).
In the embodiment of the present invention, the PDCP layer stops transmitting any data after the above data is transmitted.
Further optionally, the first INACTIVE operation further includes a second operation, the second operation being located after the first operation; the second operation includes at least one of:
the PDCP layer resets all SN (Sequence Numbering, sequence number), HFN (Hyper Frame Number, superframe number) and COUNT (counter) of the present layer to initial values;
the PDCP layer resets all parameters of the layer related to transmission data to an initial value, such as a parameter of a transmission window (e.g., tx_next (NEXT to be transmitted)), a discard timer (may also be referred to as a discard clock), other parameters of recording the number and size of data transmissions, etc., to an initial value;
the PDCP layer resets parameters of all algorithms of the layer to initial values, such as a header compression algorithm, a ciphering algorithm, and the like.
Optionally, the step of receiving and storing data sent by an upper layer after the PDCP layer performs the first INACTIVE operation includes:
The PDCP layer holds the received data and does not start a data discard timer.
Wherein the received data is PDCP SDU. In the rrc_inactive state, the PDCP layer of the first communication device, which is the transmitting end, has only a data buffering function, and data is buffered in the form of PDCP SDUs.
In the embodiment of the invention, in order to ensure long-time caching of the data, the PDCP layer does not start the data discarding timer, so that the stored data never time out, i.e. the data is not discarded due to overlong storage time.
In some embodiments of the present invention, after the step of receiving the first INACTIVE indication information sent by the upper layer, the PDCP layer further includes:
the PDCP layer sends second INACTIVE instruction information to the lower layer according to the first INACTIVE instruction information, wherein the second INACTIVE instruction information is used for instructing the lower layer to execute INACTIVE operation. Specifically, the lower layer includes an RLC layer (Radio Link Control, radio link control layer).
Optionally, the embodiment of the present invention further includes:
the RLC layer receives second INACTIVE instruction information sent by an upper layer;
and the RLC layer executes a second INACTIVE operation according to the second INACTIVE instruction information.
In the embodiment of the present invention, the second INACTIVE indication information is sent by the PDCP layer. In other embodiments, the second INACTIVE indication information may also be sent by the RRC layer.
Optionally, the step of the RLC layer performing the second INACTIVE operation according to the second INACTIVE indication information includes:
the RLC layer transmits all the valid data which can be transmitted to a lower layer, specifically including retransmitted data and newly transmitted data.
Further optionally, after the step that the RLC layer sends all the valid data that can be sent to the lower layer, the method further includes:
the RLC layer resets all parameters related to the transmission window of the layer to initial values.
Optionally, after the step of performing the second INACTIVE operation by the RLC layer according to the second INACTIVE indication information, the RLC layer further includes:
the RLC layer feeds back first indication information to the PDCP layer, wherein the first indication information is used for indicating that the RLC layer has completed INACTIVE operation;
the PDCP layer receives the first indication information and feeds back second indication information to an upper layer according to the first indication information, wherein the second indication information is used for indicating that the PDCP layer and/or a lower layer of the PDCP layer has completed an INACTIVE operation.
The embodiment of the invention also clearly defines the operations to be executed by the PDCP layer and the RLC layer of the data transmitting end when the data transmitting end is switched to the RRC INACTIVE state.
In the embodiment of the invention, the PDCP only stores the PDCP SDU received from the upper layer, and the stored data is subjected to subsequent PDCP function processing only after receiving the corresponding signaling instruction. For example, after switching to the rrc_connected state, PDCP PDUs are generated according to the corresponding signaling indication and transmitted to a lower layer.
In addition, after entering the rrc_inactive state according to the embodiment of the present invention, the PDCP entity of the first communication device may further implement Data Forwarding, where the Data Forwarding process is the same as the Data Forwarding process of the PDCP entity in the rrc_connected state, and will not be described in detail herein.
Referring to fig. 3, fig. 3 is a flowchart of a non-active switching processing method according to a second embodiment of the present invention, where the method is applied to a second communication device, and the second communication device is used as a data receiving end, and includes the following steps:
step 21: the PDCP layer receives third INACTIVE indication information sent by an upper layer;
step 22: the PDCP layer executes a third INACTIVE operation according to the third INACTIVE instruction information;
Step 23: after the PDCP layer performs the third INACTIVE operation, it stops receiving any data.
The second communication device may be a network side device, for example, a base station, or a terminal. In the rrc_inactive state, the PDCP layer function of the second communication device is as shown in fig. 2.
In the embodiment of the invention, the function of the PDCP layer of the data receiving end in the RRC_INACTIVE state is definitely defined, namely, the PDCP layer stops receiving any data.
The following illustrates the above-described inactive state switching processing method.
Optionally, after the step of performing the third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information, the PDCP layer further includes:
the PDCP layer sends fourth INACTIVE instruction information to the lower layer according to the third INACTIVE instruction information, wherein the fourth INACTIVE instruction information is used for instructing the lower layer to execute INACTIVE operation. The lower layer may be an RLC layer, or may be another lower layer, for example, a MAC (Media Access Control, medium access control) layer or a PHY (Physical) layer.
Optionally, before the step of performing the third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information, the PDCP layer further includes:
the RLC layer receives fourth INACTIVE instruction information sent by an upper layer;
And the RLC layer executes a fourth INACTIVE operation according to the fourth INACTIVE instruction information.
In the embodiment of the present invention, the fourth INACTIVE indication information may be sent by the PDCP layer. In other alternative embodiments, the fourth INACTIVE indication information may also be sent by the RRC layer.
Optionally, the fourth INACTIVE operation includes a third operation, where the third operation includes reorganizing all valid data capable of reorganizing and delivering to an upper layer.
Further optionally, the fourth INACTIVE operation further includes a fourth operation, the fourth operation being located after the third operation;
the fourth operation includes at least one of:
resetting all parameters related to a receiving window in the RLC layer to initial values;
all parameters related to ARQ (Automatic Repeat-reQuest) in the RLC layer are reset to initial values.
Optionally, after the step of performing the fourth INACTIVE operation by the RLC layer according to the fourth INACTIVE indication information, the RLC layer further includes:
the RLC layer transmits third indication information to the PDCP layer, the third indication information being used to indicate that the RLC layer has completed an INACTIVE operation.
Optionally, the third INACTIVE operation includes a fifth operation,
The step of the PDCP layer executing a third INACTIVE operation according to the third INACTIVE indication information includes:
the PDCP layer performs a fifth operation after receiving third indication information of a lower layer indicating that an INACTIVE operation has been completed, the fifth operation including at least one of:
the PDCP layer reorganizes and receives the PDCP PDU in the cache, analyzes the PDCP SDU and delivers the PDCP PDU to the upper layer according to the sequence;
the PDCP layer discards data that cannot be reassembled.
The third indication information may include third indication information sent by the RLC layer, and may further include third indication information sent by other lower layers, for example, a MAC layer and a PHY layer.
Further optionally, the third INACTIVE operation further includes a sixth operation, the sixth operation being located after the fifth operation;
the sixth operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters of the layer related to received data to initial values, such as rx_next (NEXT transmission) and rx_deliv (transmission parameters), and resets a reassembly timer (t-Reordering) to initial values;
The PDCP layer resets parameters of all algorithms of the layer to initial values, such as a header compression algorithm, a ciphering algorithm, and the like.
Optionally, after the step of performing the third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information, the PDCP layer further includes:
the PDCP layer feeds back fourth indication information to an upper layer, the fourth indication information being used to indicate that the PDCP layer has completed an INACTIVE operation. Wherein the upper layer may be an RRC layer.
The embodiment of the invention also clearly defines the PDCP layer of the data receiving end and the operation required to be executed by the RLC layer when switching to the RRC_INACTIVE state.
The embodiment of the present invention provides a technical solution corresponding to the first embodiment and having the same inventive concept, and can achieve the same technical effects, and the detailed description thereof will not be repeated herein with reference to the first embodiment.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a first communication device according to a third embodiment of the present invention, where the first communication device 40 includes:
a first receiving module 41, configured to receive, by the PDCP layer, first INACTIVE indication information sent by an upper layer;
a first execution module 42, configured to execute a first INACTIVE operation by the PDCP layer according to the first INACTIVE indication information;
A saving module 43, configured to receive and save data sent by an upper layer after the PDCP layer performs the first INACTIVE operation, and not send the data to a lower layer.
In the embodiment of the present invention, the function of the PDCP layer of the data transmitting end in the rrc_inactive state is definitely defined, and after the PDCP layer performs the first INACTIVE operation according to the first INACTIVE indication information sent by the upper layer, that is, after entering the rrc_inactive, the PDCP layer receives and stores the data sent by the upper layer, but does not send the data to the lower layer (at this time, the air interface cannot perform data transmission and reception). Since the PDCP layer can receive and store data transmitted from an upper layer in an rrc_inactive state, if rrc_connected is subsequently entered and data is required to be transmitted to the second communication device through an air interface, it is not required to acquire data from the upper layer, even from a core network, and the PDCP layer can directly acquire data, thereby speeding up data transmission. In addition, the embodiment of the invention has simple mode of realizing the data storage in the PDCP layer.
Optionally, the first INACTIVE operation includes modifying configuration parameters of the RB to enable the PDCP layer to save data received from an upper layer.
Optionally, the first INACTIVE operation includes a first operation, where the first operation includes at least one of:
the PDCP layer transmits all generated PDCP PDUs to a lower layer;
the PDCP layer transmits all PDCP SDUs received to a lower layer to generate PDCP PDUs.
Optionally, the first INACTIVE operation further includes a second operation, the second operation being located after the first operation;
the second operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters related to the sent data of the PDCP layer to initial values;
the PDCP layer resets the parameters of all algorithms of the layer to initial values.
Optionally, the storage module 43 includes:
a saving unit, configured to save the data received by the PDCP layer, and not start a data discard timer.
Optionally, the first communication device further includes:
a first sending module, configured to send, by the PDCP layer, second INACTIVE indication information to a lower layer according to the first INACTIVE indication information, where the second INACTIVE indication information is used to instruct the lower layer to perform an INACTIVE operation.
Optionally, the first communication device further includes:
A fourth receiving module, configured to receive, by the RLC layer, second INACTIVE indication information sent by an upper layer;
and the third execution module is used for executing a second INACTIVE operation by the RLC layer according to the second INACTIVE instruction information.
Optionally, the third execution module includes:
and the first sending unit is used for sending all the valid data which can be sent to the lower layer by the RLC layer.
Optionally, the third execution module includes:
and the first resetting unit is used for resetting all parameters related to the sending window of the layer to initial values by the RLC layer.
Optionally, the first communication device further includes:
a first feedback module, configured to feedback, to the PDCP layer, first indication information, where the first indication information is used to indicate that the RLC layer has completed an INACTIVE operation;
and a fifth receiving module, configured to receive the first indication information by the PDCP layer, and feed back second indication information to an upper layer according to the first indication information, where the second indication information is used to indicate that the PDCP layer and/or a lower layer of the PDCP layer has completed an INACTIVE operation.
The embodiment of the present invention is a product embodiment corresponding to the first embodiment of the above method, so that the detailed description thereof will be omitted herein.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a second communication device according to a fourth embodiment of the present invention, where the second communication device 50 includes:
a second receiving module 51, configured to receive, by the PDCP layer, third INACTIVE indication information sent by an upper layer;
a second execution module 52, configured to execute a third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information;
the third receiving module 53 is configured to stop receiving any data after the PDCP layer performs the third INACTIVE operation.
In the embodiment of the invention, the function of the PDCP layer of the data receiving end in the RRC_INACTIVE state is definitely defined, namely, the PDCP layer stops receiving any data.
Optionally, the first communication device further includes:
a second sending module, configured to send, by the PDCP layer, fourth INACTIVE indication information to a lower layer according to the third INACTIVE indication information, where the fourth INACTIVE indication information is used to instruct the lower layer to perform an INACTIVE operation.
Optionally, the first communication device further includes:
a sixth receiving module, configured to receive, by the RLC layer, fourth INACTIVE indication information sent by an upper layer;
and a fourth execution module, configured to execute a fourth INACTIVE operation by the RLC layer according to the fourth INACTIVE indication information.
Optionally, the fourth INACTIVE operation includes a third operation, where the third operation includes reorganizing all valid data capable of reorganizing and delivering to an upper layer.
Optionally, the fourth INACTIVE operation further includes a fourth operation, the fourth operation being located after the third operation;
the fourth operation includes at least one of:
resetting all parameters related to a receiving window in the RLC layer to initial values;
and resetting all parameters related to ARQ in the RLC layer to initial values.
Optionally, the first communication device further includes:
and the second feedback module is used for sending third indication information to the PDCP layer by the RLC layer, wherein the third indication information is used for indicating that the RLC layer has completed an INACTIVE operation.
Optionally, the third INACTIVE operation includes a fifth operation, and the second execution module 52 includes:
an execution unit, configured to, after receiving third indication information of a lower layer, the third indication information indicating that the INACTIVE operation has been completed, perform a fifth operation, where the fifth operation includes at least one of:
the PDCP layer reorganizes and receives the PDCP PDU in the cache, analyzes the PDCP SDU and delivers the PDCP PDU to the upper layer according to the sequence;
The PDCP layer discards data that cannot be reassembled.
Optionally, the third INACTIVE operation further includes a sixth operation, the sixth operation being located after the fifth operation;
the sixth operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters related to the received data of the PDCP layer to initial values;
the PDCP layer resets the parameters of all algorithms of the layer to initial values.
Optionally, the first communication device further includes:
and the third feedback module is used for feeding back fourth indication information to the upper layer by the PDCP layer, wherein the fourth indication information is used for indicating that the PDCP layer has completed an INACTIVE operation.
The embodiment of the present invention is a product embodiment corresponding to the second embodiment of the method, so that the description is omitted herein, and reference is made to the second embodiment in detail.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a first communication device 60 according to a fifth embodiment of the present invention, where the first communication device 60 includes a processor 61, a memory 62, and a computer program stored in the memory 62 and executable on the processor 61; the processor 61, when executing the computer program, implements the following steps:
The PDCP layer receives first INACTIVE indication information sent by an upper layer;
the PDCP layer executes a first INACTIVE operation according to the first INACTIVE instruction information;
the PDCP layer receives and stores data transmitted from an upper layer after performing the first INACTIVE operation, and does not transmit to a lower layer.
In the embodiment of the present invention, the function of the PDCP layer of the data transmitting end in the rrc_inactive state is definitely defined, and after the PDCP layer performs the first INACTIVE operation according to the first INACTIVE indication information sent by the upper layer, that is, after entering the rrc_inactive, the PDCP layer receives and stores the data sent by the upper layer, but does not send the data to the lower layer (at this time, the air interface cannot perform data transmission and reception). Since the PDCP layer can receive and store data transmitted from an upper layer in an rrc_inactive state, if rrc_connected is subsequently entered and data is required to be transmitted to the second communication device through an air interface, it is not required to acquire data from the upper layer, even from a core network, and the PDCP layer can directly acquire data, thereby speeding up data transmission. In addition, the embodiment of the invention has simple mode of realizing the data storage in the PDCP layer.
Optionally, the first INACTIVE operation includes modifying configuration parameters of the RB to enable the PDCP layer to save data received from an upper layer.
Optionally, the first INACTIVE operation includes a first operation, where the first operation includes at least one of:
the PDCP layer transmits all generated PDCP PDUs to a lower layer;
the PDCP layer transmits all PDCP SDUs received to a lower layer to generate PDCP PDUs.
Optionally, the first INACTIVE operation further includes a second operation, the second operation being located after the first operation;
the second operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters related to the sent data of the PDCP layer to initial values;
the PDCP layer resets the parameters of all algorithms of the layer to initial values.
Optionally, the computer program may further implement the following steps when executed by the processor 61:
the step of receiving and storing data transmitted by an upper layer after the PDCP layer performs the first INACTIVE operation includes:
the PDCP layer holds the received data and does not start a data discard timer.
Optionally, the computer program may further implement the following steps when executed by the processor 61:
after the step of receiving the first INACTIVE indication information sent by the upper layer, the PDCP layer further includes:
The PDCP layer sends second INACTIVE instruction information to the lower layer according to the first INACTIVE instruction information, wherein the second INACTIVE instruction information is used for instructing the lower layer to execute INACTIVE operation.
Optionally, the computer program may further implement the following steps when executed by the processor 61:
the RLC layer receives second INACTIVE instruction information sent by an upper layer;
and the RLC layer executes a second INACTIVE operation according to the second INACTIVE instruction information.
Optionally, the computer program may further implement the following steps when executed by the processor 61:
the RLC layer performs a second INACTIVE operation according to the second INACTIVE indication information, which includes:
the RLC layer transmits all valid data which can be transmitted to a lower layer.
Optionally, the computer program may further implement the following steps when executed by the processor 61:
after the step that the RLC layer sends all the valid data which can be sent to the lower layer, the RLC layer further includes:
the RLC layer resets all parameters related to the transmission window of the layer to initial values.
Optionally, the computer program may further implement the following steps when executed by the processor 61:
the RLC layer further includes, after executing the step of performing the second INACTIVE operation according to the second INACTIVE indication information:
The RLC layer feeds back first indication information to the PDCP layer, wherein the first indication information is used for indicating that the RLC layer has completed INACTIVE operation;
the PDCP layer receives the first indication information and feeds back second indication information to an upper layer according to the first indication information, wherein the second indication information is used for indicating that the PDCP layer and/or a lower layer of the PDCP layer has completed an INACTIVE operation.
The specific working process of the embodiment of the present invention is the same as that of the first embodiment of the method, so that the detailed description thereof will be omitted herein.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a second communication device according to a sixth embodiment of the present invention, where the second communication device 70 includes a processor 71, a memory 72, and a computer program stored in the memory 72 and executable on the processor 71; the processor 71 when executing the computer program implements the following steps:
the PDCP layer receives third INACTIVE indication information sent by an upper layer;
the PDCP layer executes a third INACTIVE operation according to the third INACTIVE instruction information;
after the PDCP layer performs the third INACTIVE operation, it stops receiving any data.
In the embodiment of the invention, the function of the PDCP layer of the data receiving end in the RRC_INACTIVE state is definitely defined, namely, the PDCP layer stops receiving any data.
Optionally, the computer program may further implement the following steps when executed by the processor 71:
after the PDCP layer performs the step of performing the third INACTIVE operation according to the third INACTIVE indication information, the PDCP layer further includes:
the PDCP layer sends fourth INACTIVE instruction information to the lower layer according to the third INACTIVE instruction information, wherein the fourth INACTIVE instruction information is used for instructing the lower layer to execute INACTIVE operation.
Optionally, the computer program may further implement the following steps when executed by the processor 71:
the PDCP layer further includes, before the step of performing a third INACTIVE operation according to the third INACTIVE indication information:
the RLC layer receives fourth INACTIVE instruction information sent by an upper layer;
and the RLC layer executes a fourth INACTIVE operation according to the fourth INACTIVE instruction information.
Optionally, the fourth INACTIVE operation includes a third operation, where the third operation includes reorganizing all valid data capable of reorganizing and delivering to an upper layer.
Optionally, the fourth INACTIVE operation further includes a fourth operation, the fourth operation being located after the third operation;
The fourth operation includes at least one of:
resetting all parameters related to a receiving window in the RLC layer to initial values;
and resetting all parameters related to ARQ in the RLC layer to initial values.
Optionally, the computer program may further implement the following steps when executed by the processor 71:
after the RLC layer performs the step of performing the fourth INACTIVE operation according to the fourth INACTIVE indication information, the RLC layer further includes:
the RLC layer transmits third indication information to the PDCP layer, the third indication information being used to indicate that the RLC layer has completed an INACTIVE operation.
Optionally, the third INACTIVE operation includes a fifth operation, and when the computer program is executed by the processor 71, the following steps may be further implemented:
the step of the PDCP layer executing a third INACTIVE operation according to the third INACTIVE indication information includes:
the PDCP layer performs a fifth operation after receiving third indication information of a lower layer indicating that an INACTIVE operation has been completed, the fifth operation including at least one of:
the PDCP layer reorganizes and receives the PDCP PDU in the cache, analyzes the PDCP SDU and delivers the PDCP PDU to the upper layer according to the sequence;
the PDCP layer discards data that cannot be reassembled.
Optionally, the third INACTIVE operation further includes a sixth operation, the sixth operation being located after the fifth operation;
the sixth operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters related to the received data of the PDCP layer to initial values;
the PDCP layer resets the parameters of all algorithms of the layer to initial values.
Optionally, the computer program may further implement the following steps when executed by the processor 71:
after the PDCP layer performs the step of performing the third INACTIVE operation according to the third INACTIVE indication information, the PDCP layer further includes:
the PDCP layer feeds back fourth indication information to an upper layer, the fourth indication information being used to indicate that the PDCP layer has completed an INACTIVE operation.
The specific working process of the embodiment of the present invention is identical to that of the second embodiment of the method, so that the detailed description thereof will be omitted herein, and reference is made to the description of the method steps in the second embodiment.
An embodiment seven of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the switching processing method in the inactive state of any one of the above-described embodiment one or embodiment two. For details, reference is made to the description of the method steps in the corresponding embodiments above.
The network side device in the embodiment of the present invention may be a base station (Base Transceiver Station, BTS) in global mobile communications (Global System of Mobile communication, GSM for short) or code division multiple access (Code Division Multiple Access, CDMA for short), a base station (NodeB, NB for short) in wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA for short), an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, a relay station or access point, or a base station in a future 5G network, etc., which are not limited herein.
The terminal in the embodiment of the invention can be a wireless terminal or a wired terminal, and the wireless terminal can be a device for providing voice and/or other service data connectivity for a user, a handheld device with a wireless connection function or other processing devices connected to a wireless modem. A wireless terminal may communicate with one or more core networks via a radio access network (Radio Access Network, RAN for short), which may be mobile terminals such as mobile phones (or "cellular" phones) and computers with mobile terminals, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiation Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDA) and the like. A wireless Terminal may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), remote Station (Remote Station), remote Terminal (Remote Terminal), access Terminal (Access Terminal), user Terminal (User Terminal), user Agent (User Agent), terminal (User Device or User Equipment), without limitation.
Such computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may be implemented in any method or technology for information storage. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium which can be used to store information that can be accessed by a computing device.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (23)
1. The inactive state switching processing method is applied to a first communication device, and the first communication device is used as a data sending end, and is characterized by comprising the following steps:
the PDCP layer receives first INACTIVE indication information sent by an upper layer;
the PDCP layer executes a first INACTIVE operation according to the first INACTIVE instruction information;
the PDCP layer receives and stores data transmitted from an upper layer after performing the first INACTIVE operation, and does not transmit to a lower layer.
2. The handover processing method of claim 1, wherein the first INACTIVE operation comprises modifying configuration parameters of RBs so that the PDCP layer can save data received from an upper layer.
3. The INACTIVE state switching processing method according to claim 1, wherein the first INACTIVE operation comprises a first operation comprising at least one of:
the PDCP layer transmits all generated PDCP PDUs to a lower layer;
the PDCP layer transmits all PDCP SDUs received to a lower layer to generate PDCP PDUs.
4. The method according to claim 3, wherein the first INACTIVE operation further comprises a second operation, the second operation being located after the first operation;
The second operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters related to the sent data of the PDCP layer to initial values;
the PDCP layer resets the parameters of all algorithms of the layer to initial values.
5. The handover processing method of INACTIVE state of claim 1, wherein the step of receiving and saving data transmitted by an upper layer after the PDCP layer performs the first INACTIVE operation comprises:
the PDCP layer holds the received data and does not start a data discard timer.
6. The handover processing method according to claim 1, wherein after the step of the PDCP layer receiving the first INACTIVE indication information transmitted from the upper layer, further comprising:
the PDCP layer sends second INACTIVE instruction information to the lower layer according to the first INACTIVE instruction information, wherein the second INACTIVE instruction information is used for instructing the lower layer to execute INACTIVE operation.
7. The inactive state switching processing method according to claim 1 or 6, further comprising:
the RLC layer receives second INACTIVE instruction information sent by an upper layer;
And the RLC layer executes a second INACTIVE operation according to the second INACTIVE instruction information.
8. The handover processing method according to claim 7, wherein the RLC layer performs a second INACTIVE operation according to the second INACTIVE indication information, comprising:
the RLC layer transmits all valid data which can be transmitted to a lower layer.
9. The handover processing method according to claim 8, wherein after the step of the RLC layer transmitting all valid data that can be transmitted to a lower layer, further comprising:
the RLC layer resets all parameters related to the transmission window of the layer to initial values.
10. The handover processing method according to claim 7, wherein after the step of performing a second INACTIVE operation according to the second INACTIVE indication information, the RLC layer further comprises:
the RLC layer feeds back first indication information to the PDCP layer, wherein the first indication information is used for indicating that the RLC layer has completed INACTIVE operation;
the PDCP layer receives the first indication information and feeds back second indication information to an upper layer according to the first indication information, wherein the second indication information is used for indicating that the PDCP layer and/or a lower layer of the PDCP layer has completed an INACTIVE operation.
11. The inactive state switching processing method is applied to a second communication device, and the second communication device is used as a data receiving end, and is characterized by comprising the following steps:
the PDCP layer receives third INACTIVE indication information sent by an upper layer;
the PDCP layer executes a third INACTIVE operation according to the third INACTIVE instruction information;
after the PDCP layer performs the third INACTIVE operation, it stops receiving any data.
12. The handover processing method according to claim 11, wherein after the step of the PDCP layer performing a third INACTIVE operation according to the third INACTIVE indication information, further comprising:
the PDCP layer sends fourth INACTIVE instruction information to the lower layer according to the third INACTIVE instruction information, wherein the fourth INACTIVE instruction information is used for instructing the lower layer to execute INACTIVE operation.
13. The handover processing method according to claim 11 or 12, wherein the PDCP layer further includes, before the step of performing a third INACTIVE operation according to the third INACTIVE indication information:
the RLC layer receives fourth INACTIVE instruction information sent by an upper layer;
and the RLC layer executes a fourth INACTIVE operation according to the fourth INACTIVE instruction information.
14. The method according to claim 13, wherein the fourth INACTIVE operation includes a third operation, and the third operation includes reorganizing all valid data capable of reorganizing and delivering to an upper layer.
15. The method according to claim 14, wherein the fourth INACTIVE operation further comprises a fourth operation, the fourth operation being located after the third operation;
the fourth operation includes at least one of:
resetting all parameters related to a receiving window in the RLC layer to initial values;
and resetting all parameters related to ARQ in the RLC layer to initial values.
16. The handover processing method according to claim 13, wherein after the step of the RLC layer performing a fourth INACTIVE operation according to the fourth INACTIVE indication information, further comprising:
the RLC layer transmits third indication information to the PDCP layer, the third indication information being used to indicate that the RLC layer has completed an INACTIVE operation.
17. The method of claim 11, wherein the third INACTIVE operation comprises a fifth operation,
The step of the PDCP layer executing a third INACTIVE operation according to the third INACTIVE indication information includes:
the PDCP layer performs a fifth operation after receiving third indication information of a lower layer indicating that an INACTIVE operation has been completed, the fifth operation including at least one of:
the PDCP layer reorganizes and receives the PDCP PDU in the cache, analyzes the PDCP SDU and delivers the PDCP PDU to the upper layer according to the sequence;
the PDCP layer discards data that cannot be reassembled.
18. The method according to claim 17, wherein the third INACTIVE operation further comprises a sixth operation, the sixth operation being located after the fifth operation;
the sixth operation includes at least one of:
the PDCP layer resets all the SN, HFN and COUNT of the layer to initial values;
the PDCP layer resets all parameters related to the received data of the PDCP layer to initial values;
the PDCP layer resets the parameters of all algorithms of the layer to initial values.
19. The handover processing method according to claim 11, wherein after the step of the PDCP layer performing a third INACTIVE operation according to the third INACTIVE indication information, further comprising:
The PDCP layer feeds back fourth indication information to an upper layer, the fourth indication information being used to indicate that the PDCP layer has completed an INACTIVE operation.
20. A first communication apparatus as a transmitting end of data, comprising:
a first receiving module, configured to receive, by a PDCP layer, first INACTIVE indication information sent by an upper layer;
a first execution module, configured to execute a first INACTIVE operation by the PDCP layer according to the first INACTIVE indication information;
and a saving module, configured to receive and save data sent by an upper layer after the PDCP layer performs the first INACTIVE operation, and not send the data to a lower layer.
21. A second communication apparatus as a receiving end of data, comprising:
a second receiving module, configured to receive, by the PDCP layer, third INACTIVE indication information sent by an upper layer;
a second execution module, configured to execute a third INACTIVE operation by the PDCP layer according to the third INACTIVE indication information;
and a third receiving module, configured to stop receiving any data after the PDCP layer performs the third INACTIVE operation.
22. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor; the method according to any one of claims 1 to 19, characterized in that the processor implements a switching processing method in an inactive state when executing the computer program.
23. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, realizes the steps in the switching processing method of the inactive state according to any one of claims 1 to 19.
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