CN109121163B - SDAP layer remapping method based on SDAP PDU length - Google Patents
SDAP layer remapping method based on SDAP PDU length Download PDFInfo
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- CN109121163B CN109121163B CN201811185733.1A CN201811185733A CN109121163B CN 109121163 B CN109121163 B CN 109121163B CN 201811185733 A CN201811185733 A CN 201811185733A CN 109121163 B CN109121163 B CN 109121163B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
- H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
Abstract
The invention relates to an SDAP layer remapping method based on SDAP PDU length, belongs to the technical field of communication, and solves the problem that the prior art can not ensure that uplink data is correctly received by a receiving end. The method is applied to a network side; the method comprises the following steps: the network side RRC sends an RRC reconfiguration signaling to the terminal side RRC so that the terminal side can reconfigure according to the RRC reconfiguration signaling and generate a reconfiguration completion signaling; the network side RRC receives a reconfiguration completion signaling fed back by the terminal side RRC, and the content of the reconfiguration completion signaling at least comprises: the SDAP PDU length field and the RRC reconfiguration signaling are received successfully at the air interface at the time point StartPoint; and the network side RRC starts remapping and sends the SDAP PDU to the terminal side RRC so that the terminal side confirms whether the correct SDAP PDU is received or not according to the StartPoint and the stored SDAP PDU length field. The method can ensure that the terminal side RRC correctly receives the SDAP PDU, realizes the high-reliability receiving and sending of the remapping information, reduces the development cost and simultaneously ensures the perfection of the remapping process.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an SDAP layer remapping method based on the SDAP PDU length.
Background
A new data processing protocol sub-layer, the SDAP (Service Discovery Application Profile) protocol sub-layer, is introduced in 5G. The SDAP protocol sub-layer mainly performs the mapping function of QoS flow (Quality of service) and DRB.
When the mapping relationship of QoS flow to DRB (Data radio Bearer) changes, for example: when the QoS flow is established, the QoS flow is mapped to the DRB0, and needs to be mapped to the DRB1 through a remapping method. The specific implementation of remapping is currently two types: configuring through signaling; the manner of mapping by reflection is self-determined by the QoS flow data plane.
The SDAP of 5G provides a remapping requirement, how to complete the whole remapping process, and at present, many manufacturers propose to add Endmark (a special Data end identifier) in an SDAP PDU (Protocol Data Unit) to inform that the SDAP has successfully sent the Data on the source DRB, and the Data received on the target DRB is a normal sequence Data packet.
The above manner for sending the Endmark for the uplink packet has the following problems: how many times the Endmark is sent can ensure the receiving end to successfully receive; if only one Endmark is sent, how the transmission fails is handled. Other schemes in the prior art cannot ensure that uplink data can be correctly received by a receiving end.
Disclosure of Invention
In view of the foregoing analysis, the present invention aims to provide an SDAP layer remapping method based on the SDAP PDU length, so as to solve the problem that the prior art cannot ensure that the uplink data is correctly received by the receiving end.
The purpose of the invention is mainly realized by the following technical scheme:
in the first embodiment of the invention, an SDAP layer remapping method based on the SDAP PDU length is disclosed, which is applied to a network side; the method comprises the following steps:
the network side RRC sends an RRC reconfiguration signaling to the terminal side RRC so that the terminal side can carry out reconfiguration according to the RRC reconfiguration signaling and generate an RRC reconfiguration completion signaling;
the network side RRC receives a reconfiguration complete signaling fed back by the terminal side RRC, and the content of the RRC reconfiguration complete signaling at least comprises: an SDAP PDU length field and a StartPoint at the time point of successful receiving of the RRC reconfiguration signaling at an air interface;
and the network side RRC starts remapping and sends the SDAP PDU to the terminal side RRC so that the terminal side can confirm whether the correct SDAP PDU is received or not according to the StartPoint and the stored SDAP PDU length field.
On the basis of the scheme, the invention is further improved as follows:
further, the RRC reconfiguration signaling contains new QoS Flow relocation information.
In a second embodiment of the present invention, a method for remapping an SDAP layer based on the length of an SDAP PDU is disclosed, which is applied to a terminal side; the method comprises the following steps:
the terminal side RRC receives and analyzes the RRC reconfiguration signaling sent by the network side RRC, records the StartPoint of the successful receiving time point of the RRC reconfiguration signaling at the air interface, and obtains the SDAP PDU length field according to the RRC reconfiguration signaling;
carrying out reconfiguration by using the RRC reconfiguration signaling, generating an RRC reconfiguration completion signaling after the reconfiguration is completed, and sending the RRC reconfiguration completion signaling to the network side RRC so that the network side starts remapping according to the RRC reconfiguration completion signaling;
and the terminal side receives the SDAP PDU sent by the network side and confirms whether the correct SDAP PDU is received according to the SDAP PDU length field and the StartPoint which are already stored by the RRC of the terminal side.
On the basis of the scheme, the invention is further improved as follows:
further, the RRC reconfiguration complete signaling content at least includes: and the SDAP PDU length field and the time point StartPoint of successful receiving of the RRC reconfiguration signaling at an air interface.
Further, the following operations are specifically executed according to the length field of the SDAP PDU already stored by the terminal side RRC and the StartPoint confirming that the correct SDAP PDU is received:
the terminal side RRC receives the SDAP PDU, when the StartPoint is detected, the received SDAP PDU length is recorded, after the reception is finished, the total length of the received SDAP PDU is compared with the SDAP PDU length field, and if the total length of the received SDAP PDU is consistent with the SDAP PDU length field, the SDAP PDU is correctly received; if not, indicating that the SDAP PDU is not correctly received.
Further, the obtaining the length field of the SDAP PDU according to the RRC reconfiguration signaling includes:
and obtaining the SDAP PDU length field according to the RRC reconfiguration signaling and the resource management algorithm.
In a third embodiment of the present invention, an SDAP layer remapping method based on the length of an SDAP PDU is disclosed, which is used for interaction between a network side and a terminal side, and includes the following steps:
the network side RRC sends an RRC reconfiguration signaling to the terminal side RRC;
the terminal side RRC receives and analyzes the RRC reconfiguration signaling, records a StartPoint at the time point of successful reception of the RRC reconfiguration signaling at an air interface, and obtains an SDAP PDU length field according to the RRC reconfiguration signaling;
carrying out reconfiguration by using the RRC reconfiguration signaling, generating an RRC reconfiguration completion signaling after the reconfiguration is completed, and sending the RRC reconfiguration completion signaling to the network side RRC so that the network side starts remapping according to the RRC reconfiguration completion signaling;
the network side RRC receives the RRC reconfiguration completion signaling, starts remapping and sends SDAP PDU to the terminal side RRC;
and the terminal side RRC receives the SDAP PDU and confirms that the correct SDAP PDU is received according to the SDAP PDU length field and the StartPoint which are already stored by the terminal side RRC.
On the basis of the scheme, the invention is further improved as follows:
the RRC reconfiguration complete signaling content includes at least: and the SDAP PDU length field and the time point StartPoint of successful receiving of the RRC reconfiguration signaling at an air interface.
Further, the following operations are specifically executed according to the length field of the SDAP PDU already stored by the terminal side RRC and the StartPoint confirming that the correct SDAP PDU is received:
the terminal side RRC receives the SDAP PDU, when the StartPoint is detected, the received SDAP PDU length is recorded, after the reception is finished, the total length of the received SDAP PDU is compared with the SDAP PDU length field, and if the total length of the received SDAP PDU is consistent with the SDAP PDU length field, the SDAP PDU is correctly received; if not, indicating that the SDAP PDU is not correctly received.
Further, the RRC reconfiguration signaling contains new QoS Flow relocation information.
The invention has the following beneficial effects:
the SDAP layer remapping method based on the SDAP PDU length provided by the invention can ensure that the terminal side RRC correctly receives the SDAP PDU by utilizing the existing communication link between the network side RRC and the terminal side RRC to verify the reliability of the remapping information, thereby realizing the high-reliability receiving and sending of the remapping information, reducing the development cost and simultaneously ensuring the perfection of the remapping process.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic diagram of an SDAP architecture;
fig. 2 is a schematic diagram of a method for SDAP layer remapping based on SDAP PDU length.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Since RRC (Radio Resource Control) signaling is transmitted on SRB (Signal Radio Bearer), SRB is in an AM Mode (Acknowledgement Mode) of RLC (Radio Link Control), and there is an ARQ (Automatic Repeat-reQuest, ARQ) retransmission mechanism in AM, so that signaling loss does not occur, the signaling of RRC is highly reliable at the air interface, and each signaling can be correctly received through the Acknowledgement Mode of L2(Layer 2: Layer 2).
FIG. 1 is a diagram showing the SDAP sub-layer from the perspective of the protocol architecture; the SDAP sublayer is configured through RRC signaling and is responsible for mapping the QoS flow to the corresponding DRB; one or more QoS flows may be mapped to the same DRB, and one QoS flow may be mapped to only one DRB.
In the method of the present invention, the SDAP remapping is directly configured by RRC Reconfiguration signaling (RRC Connection Reconfiguration), the RRC Reconfiguration Complete signaling (RRC Connection Reconfiguration Complete) is used as peer-to-peer response signaling, and the length of the SDAP PDU is carried in the RRC Reconfiguration Complete signaling.
A first embodiment of the present invention provides an SDAP layer remapping method based on the length of an SDAP PDU, applied to a network side, including the following steps:
step S1: the network side RRC sends an RRC reconfiguration signaling to the terminal side RRC so that the terminal side can carry out reconfiguration according to the RRC reconfiguration signaling and generate an RRC reconfiguration completion signaling;
step S2: the network side RRC receives a reconfiguration complete signaling fed back by the terminal side RRC, and the content of the RRC reconfiguration complete signaling at least comprises: an SDAP PDU length field and a StartPoint at the time point of successful receiving of the RRC reconfiguration signaling at an air interface;
step S3: and the network side RRC starts remapping and sends SDAP PDU to the terminal side RRC so that the terminal side can confirm whether correct SDAP PDU is received or not according to the StartPoint and the stored SDAP PDU length field.
Wherein, the RRC reconfiguration signaling contains new QoS Flow relocation information.
A second embodiment of the present invention provides an SDAP layer remapping method based on the length of an SDAP PDU, applied to a terminal side, including the following steps:
step S1: the terminal side RRC receives and analyzes the RRC reconfiguration signaling sent by the network side RRC, records the StartPoint of the successful receiving time point of the RRC reconfiguration signaling at the air interface, and obtains the SDAP PDU length field according to the RRC reconfiguration signaling;
step S2: carrying out reconfiguration by using the RRC reconfiguration signaling, generating an RRC reconfiguration completion signaling after the reconfiguration is completed, and sending the reconfiguration completion signaling to the network side RRC so that the network side starts remapping according to the RRC reconfiguration completion signaling; the RRC reconfiguration complete signaling content includes at least: and the SDAP PDU length field and the time point StartPoint of successful receiving of the RRC reconfiguration signaling at an air interface.
Step S3: and the terminal side receives the SDAP PDU sent by the network side and confirms whether the correct SDAP PDU is received according to the SDAP PDU length field and the StartPoint which are already stored by the RRC of the terminal side.
Step S3 further performs the following operations:
the terminal side RRC receives the SDAP PDU, when the StartPoint is detected, the received SDAP PDU length is recorded, after the reception is finished, the total length of the received SDAP PDU is compared with the SDAP PDU length field, and if the total length of the received SDAP PDU is consistent with the SDAP PDU length field, the SDAP PDU is correctly received; if not, indicating that the SDAP PDU is not correctly received.
Preferably, the obtaining the length field of the SDAP PDU according to the RRC reconfiguration signaling includes: and obtaining the SDAP PDU length field according to the RRC reconfiguration signaling and the resource management algorithm.
A third embodiment of the present invention discloses an SDAP layer remapping method based on the length of an SDAP PDU, for implementing the interaction between a network side RRC and a terminal side RRC, as shown in fig. 2, including the following steps:
step S1: when the network side determines that the terminal side meets the RRC signaling reconfiguration condition, the network side RRC sends an RRC reconfiguration signaling (RRC connection reconfiguration) to the terminal side RRC;
the RRC reconfiguration signaling contains new QoS Flow relocation information;
when the following conditions occur, the terminal side meets the RRC signaling reconfiguration condition:
(1) the information of the terminal side changes, an RRC signaling reconfiguration request is provided to the network side, and the network side receives the request:
1) the DRB parameters at the terminal side are changed;
2) the position of the current terminal side user changes;
3) new service appears at the terminal side;
(2) the network side decides the reconfiguration according to the situation of the terminal side.
Step S2: the terminal side RRC receives and analyzes the RRC reconfiguration signaling, records a StartPoint at the time point of successful reception of the RRC reconfiguration signaling at an air interface, and takes the StartPoint as the initial identification information of a first data packet in the SDAP PDU; obtaining a length field of the SDAP PDU according to a resource management algorithm, such as a service quality control algorithm, a Radio Bearer (RB) flow control algorithm and the like;
step S3: carrying out Reconfiguration by using the RRC Reconfiguration signaling, generating an RRC Reconfiguration completion signaling (RRC Connection Reconfiguration Complete) after the Reconfiguration is completed, and sending the RRC Reconfiguration completion signaling to the network side RRC;
the RRC reconfiguration complete signaling content includes at least: an SDAP PDU length field and a StartPoint at the time point of successful receiving of the RRC reconfiguration signaling at an air interface;
step S4: the network side RRC receives the RRC reconfiguration completion signaling, starts remapping and sends SDAP PDU to the terminal side RRC;
step S5: and the terminal side RRC receives the SDAP PDU, and confirms that the correct SDAP PDU is received according to the SDAP PDU length field stored by the terminal side RRC and the start identification information StartPoint of the first data packet in the SDAP PDU.
And the SDAP PDU is a data packet which needs to be sent for the remapped QoS Flow from the start of the remapping operation to the end.
Preferably, the step S5 further includes:
the terminal side RRC receives the SDAP PDU, when the starting identification information StartPoint is detected, the received SDAP PDU length is recorded, after the receiving is finished, the total length of the received SDAP PDU is compared with the SDAP PDU length field, and if the total length of the received SDAP PDU is consistent with the SDAP PDU length field, the SDAP PDU is correctly received; if not, indicating that the SDAP PDU is not correctly received.
The SDAP layer remapping method based on the SDAP PDU length provided by the invention can ensure that the terminal side RRC correctly receives the SDAP PDU by utilizing the existing communication link between the network side RRC and the terminal side RRC to verify the reliability of the remapping information, thereby realizing the high-reliability receiving and sending of the remapping information, reducing the development cost and simultaneously ensuring the perfection of the remapping process.
Those skilled in the art will appreciate that all or part of the flow of the method implementing the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium, to instruct related hardware. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. An SDAP layer remapping method based on the SDAP PDU length is applied to a network side; the method is characterized by comprising the following steps:
the network side RRC sends an RRC reconfiguration signaling to the terminal side RRC so that the terminal side can carry out reconfiguration according to the RRC reconfiguration signaling and generate an RRC reconfiguration completion signaling;
the network side RRC receives a reconfiguration complete signaling fed back by the terminal side RRC, and the content of the RRC reconfiguration complete signaling at least comprises: an SDAP PDU length field and a StartPoint at the time point of successful receiving of the RRC reconfiguration signaling at an air interface;
and the network side RRC starts remapping and sends the SDAP PDU to the terminal side RRC so that the terminal side can confirm whether the correct SDAP PDU is received or not according to the StartPoint and the stored SDAP PDU length field.
2. The method according to claim 1, wherein the RRC reconfiguration signaling includes new QoS Flow relocation information.
3. An SDAP layer remapping method based on the SDAP PDU length is applied to a terminal side; the method is characterized by comprising the following steps:
the terminal side RRC receives and analyzes the RRC reconfiguration signaling sent by the network side RRC, records the StartPoint of the successful receiving time point of the RRC reconfiguration signaling at the air interface, and obtains the SDAP PDU length field according to the RRC reconfiguration signaling;
carrying out reconfiguration by using the RRC reconfiguration signaling, generating an RRC reconfiguration completion signaling after the reconfiguration is completed, and sending the RRC reconfiguration completion signaling to the network side RRC so that the network side starts remapping according to the RRC reconfiguration completion signaling;
and the terminal side receives the SDAP PDU sent by the network side and confirms whether the correct SDAP PDU is received according to the SDAP PDU length field and the StartPoint which are already stored by the RRC of the terminal side.
4. The method of claim 3, wherein the RRC reconfiguration complete signaling content comprises at least: and the SDAP PDU length field and the time point StartPoint of successful receiving of the RRC reconfiguration signaling at an air interface.
5. The method according to claim 3 or 4, wherein the confirmation of the receipt of the correct SDAP PDU according to the StartPoint length field already stored by the terminal side RRC specifically performs the following operations:
the terminal side RRC receives the SDAP PDU, when the StartPoint is detected, the length of the received SDAP PDU is recorded, after the reception is finished, the total length of the received SDAP PDU is compared with the length field of the SDAP PDU, and if the total length of the received SDAP PDU is consistent with the length field of the SDAP PDU, the SDAP PDU is correctly received; if not, indicating that the SDAP PDU is not correctly received.
6. The method of claim 4, wherein the obtaining the SDAP PDU length field according to the RRC reconfiguration signaling comprises:
and obtaining the SDAP PDU length field according to the RRC reconfiguration signaling and the resource management algorithm.
7. A method for SDAP layer remapping based on SDAP PDU length, characterized in that the method comprises the following steps:
the network side RRC sends an RRC reconfiguration signaling to the terminal side RRC;
the terminal side RRC receives and analyzes the RRC reconfiguration signaling, records a StartPoint at the time point of successful reception of the RRC reconfiguration signaling at an air interface, and obtains an SDAP PDU length field according to the RRC reconfiguration signaling;
carrying out reconfiguration by using the RRC reconfiguration signaling, generating an RRC reconfiguration completion signaling after the reconfiguration is completed, and sending the RRC reconfiguration completion signaling to the network side RRC so that the network side starts remapping according to the reconfiguration completion signaling;
the network side RRC receives the RRC reconfiguration completion signaling, starts remapping and sends SDAP PDU to the terminal side RRC;
and the terminal side RRC receives the SDAP PDU and confirms that the correct SDAP PDU is received according to the SDAP PDU length field and the StartPoint which are already stored by the terminal side RRC.
8. The method of claim 7, wherein the RRC reconfiguration complete signaling content comprises at least: and the SDAP PDU length field and the time point StartPoint of successful receiving of the RRC reconfiguration signaling at an air interface.
9. The method according to claim 7 or 8, wherein the confirmation of the receipt of the correct SDAP PDU according to the StartPoint length field already stored by the terminal side RRC specifically performs the following operations:
the terminal side RRC receives the SDAP PDU, when the StartPoint is detected, the received SDAP PDU length is recorded, after the reception is finished, the total length of the received SDAP PDU is compared with the SDAP PDU length field, and if the total length of the received SDAP PDU is consistent with the SDAP PDU length field, the SDAP PDU is correctly received; if not, indicating that the SDAP PDU is not correctly received.
10. The method according to claim 7, wherein the RRC reconfiguration signaling includes new QoS Flow relocation information.
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| CN108541387A (en) * | 2017-07-25 | 2018-09-14 | 北京小米移动软件有限公司 | A kind of data packet discarding methods, devices and systems |
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