WO2012000357A1

WO2012000357A1 - Method for processing dirty data of user plane and terminal device thereof

Info

Publication number: WO2012000357A1
Application number: PCT/CN2011/074672
Authority: WO
Inventors: 朱伟伟; 刘智鹏; 康书杰
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-28
Filing date: 2011-05-25
Publication date: 2012-01-05
Also published as: CN101909361A

Abstract

A method for processing dirty data of a user plane and a terminal device thereof are disclosed in the present invention, which is applied to data processing of communication devices. With the present invention, the dirty data is cleared thoroughly by a Radio Resource Control (RRC) initializing every sub-layer of the user plane when the dirty data is generated in certain sub-layer of the user plane. The whole user plane is recovered from detectable data structure exception, and an abnormity restart mechanism is avoid from using effectively, and better user experience is provided.

Description

Method for processing user face dirty data and terminal device

The present invention relates to the field of communications, and in particular, to a method and a terminal device for processing user dirty data. Background technique

The user plane of Long Term Evolution (LTE) line termination equipment includes Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), and Media Access Control (MAC), which together play a pivotal role in the overall system. A carrier that controls signaling and service data. In order to carry various applications with high bandwidth requirements, LTE requires that the peak data rate needs to reach 50Mbps upstream and 100Mbps downlink. These performance indicators determine that each development team must do its utmost to use the most efficient algorithm in the design of each module on the user side. And the data structure. However, from a software engineering perspective, efficient algorithms and data structures are often accompanied by large risks. If a module in the data plane runs to an abnormal state (the linked list structure is faulty, enters an infinite loop, etc.), an effective mechanism is needed to recover the entire data plane from the abnormal data structure, and continue to send the uplink and downlink data. With receiving.

For example, RRC plays the role of master control in the LTE access layer (AS, Access Stratum) layer. When a sub-layer of the data plane detects its own abnormality (such as a data structure error or an infinite loop, etc.), it will combine RRC to try to reconstruct the entire user plane with a special RRC connection to clear the dirty data of the user plane. And go out of the abnormal state. During the RRC connection re-establishment process, the PDCP module and the RLC module will transmit the PDUs received by themselves into the SDU (service data unit) as much as possible, and if the data structure is abnormal, the data of the sub-layer is considered abnormal. data. Because the three levels of the entire user plane are closely related, when a sub-layer detects that there is an abnormality in its own data structure, the cached data in the other two sub-layers is also treated as a link. Dirty data. In this way, SDU data and PDU data buffered in each sublayer of the user plane should be cleared and released.

Therefore, the existing special RRC connection re-establishment process can only be applied in a simple abnormal situation. When a relatively complex or deeper level of anomaly occurs, the existing path cannot be completely solved, so that the device will eventually enter the hot restart mechanism. Summary of the invention

The main technical problem to be solved by the present invention is to provide a method for processing user's dirty data and a terminal device, which can recover the entire user plane from a detectable data structure abnormality and avoid the hot restart phenomenon.

In order to solve the above technical problem, the present invention provides a method for processing user face dirty data, and the flow is: RRC initializes each sublayer of the user plane when dirty data is generated at a certain sublayer of the user plane.

Each sublayer of the user plane includes a MAC, an RLC, and a PDCP.

The specific steps for initializing the three sub-layers are as follows: first, the RRC notifies the MAC initialization; after completion, the MAC notifies the RLC to initialize; after completion, the RLC notifies the PDCP to initialize; after completion, the PDCP notifies the initial completion of the RRC data plane; The initialization refers to all timers and related buffers taking initial values.

Before performing sub-layer initialization, the initialization preparation is further included, the initialization preparation includes: RRC suspending all activated radio bearers (RBs); resetting the MAC includes stopping all timers of the MAC sublayer, and stopping possible randomness Access the process and release the random access related resources; stop the packet data interface (PDI, Packet data interface) to send, release the physical layer (PHY).

After the initialization, the step of re-establishing the connection includes: RRC initiates a re-establishment request, and the MAC initiates a random access procedure during the re-establishment process to ensure that the signaling radio bearer is established, and the control plane data can be sent; the re-establishment is completed, and the signaling radio bearer is restored. The user equipment (UE) waits for the reconstruction message sent by the network side on the signaling radio bearer, and starts to match the three sublayers of the user plane. After the completion, the notification packet data interface (PDI) continues to send (send), and the data service continues.

In the foregoing aspects, the RRC determines the occurrence of dirty data based on an abnormality report generated after the user's face layer detects itself.

A terminal device includes: an RRC control unit, configured to initialize each sublayer of a user plane when a certain sublayer of the user plane generates dirty data.

Preferably, the user plane layer unit is further included, and the MAC module, the RLC module and the PDCP module are included in the user plane layer unit.

Preferably, the method further includes: an initialization preparation unit, configured for initializing the initialization of each sub-layer of the user plane; and reconstructing the connection unit, and the post-reconstruction connection for initializing each sub-layer of the user plane.

The terminal device is preferably a line terminal device.

The beneficial effects of the present invention are: RRC initializes each sub-layer of the user plane when generating dirty data in a sub-layer of the user plane; thereby completely removing the dirty data, so that the entire user plane is abnormal from the detectable data structure. Recovery, effectively avoiding the use of an abnormal hot restart mechanism, can provide a better user experience. DRAWINGS

FIG. 1 is a flowchart of an abnormal reconstruction process of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

A method for processing user-faced dirty data, when the data plane sub-layer detects its own abnormality, indicates RRC; RRC initializes each sub-layer of the user plane. The general process is MAC, RLC,

The PDCP discards all cached data and reinitializes it.

In the initialization of each sub-layer of the user plane, an initialization preparation is also required: The RRC suspends all activated radio bearers and resets the MAC; releases the physical layer.

After the initialization of each sublayer of the user plane is completed, it is preferable to have a reestablishment connection step: The general procedure is to configure the MAC and the PHY in common, and the RRC initiates a reestablishment request and performs random access. This step enables data transmission and reception.

Referring to FIG. 1, in a preferred embodiment of the present invention, a sub-layer of the user plane detects an abnormality and indicates RRC. The abnormality at this time refers to the data structure being destroyed, and a sub-layer of the user plane generates dirty data. The specific process of its abnormal reconstruction is:

After the RRC obtains the abnormality notification detected by a certain sublayer of the user plane, suspends all activated RBs; resets the MAC, stops all timers of the MAC sublayer, stops the possible random access procedure, and releases the random access related Resource

Because the data plane is abnormal at this time, it is necessary to stop the PDI to continue sending in time. The abnormal sublayer informs that the PDCP stops the PDI transmission and releases the PHY;

After the PHY is released, the uplink and downlink data are stopped. At this time, the RRC notifies the MAC initialization, all timers of the MAC sublayer, the relevant cache takes the initial value, and the dirty data of the MAC layer is cleared, and returns to the predictable state;

After the MAC initialization is completed, the MAC notifies the RLC to initialize, all timers of the RLC sublayer, the relevant cache takes the initial value, and the dirty data of the RLC sublayer is cleared, and returns to the predictable state;

After the initialization of the RLC is completed, the RLC notifies the PDCP to initialize, all the timers of the PDCP sublayer, the relevant buffer takes the initial value, and the dirty data of the PDCP sublayer is cleared, and returns to the predictable state;

After the PDCP initialization is completed, the PDCP notifies the RRC data plane that the initialization is completed, and the entire data plane returns to the initial state;

After the data plane returns to the initial state, the connection needs to be re-established so that the service data can continue to be sent from the UE to the network side, so the RRC needs to initiate a reestablishment request;

The MAC layer initiates a random access procedure in the RRC re-establishment process to ensure that SRB1 is established and control plane data can be sent; The reconstruction is completed, and the SRB (Signaling Radio Bearer) is restored. The UE waits for the reconstruction message sent by the network side on the SRB, and starts to configure the three sublayers of the user plane;

After the configuration of the three sub-layers of the user plane is completed, the logical channel carrying the service can be resumed. At this time, the PDI is notified to continue to send the packet, and the data service continues; the packet loss caused in the process can be compensated by the upper layer protocol.

A terminal device includes: an RRC control unit, configured to initialize each sublayer of a user plane when a certain sublayer of the user plane generates dirty data. The preferred terminal device is a line termination equipment (LTE).

More specifically, the user plane layer unit is further included, and the MAC module, the RLC module, and the PDCP module are included in the user plane layer unit.

More specifically, the packet initialization initialization unit also rebuilds the connection unit. The initialization preparation unit is used for preliminary preparation of initialization of each sublayer of the user plane. Reconstruct the connection unit, which is used to initialize the post-reconstruction connection of each sub-layer of the user plane.

The abnormal (dirty data) processing method of the present invention can reinitialize each module of the user plane and avoid using an abnormal hot restart mechanism, thereby providing a better user experience. Especially for existing devices, it is a way for LTE devices to completely remove dirty data.

The above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. It is to be understood by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.

Claims

Claim

A method for processing user-faced dirty data, the method comprising: RRC initializing each sub-layer of a user plane when a user layer generates dirty data.

2. The method for processing user interface data according to claim 1, wherein each sublayer of the user plane comprises a medium access control (MAC), a radio link control (RLC), and a packet data convergence protocol ( PDCP).

The processing method of the user plane data according to claim 2, wherein the sub-layers of the user plane are initialized to: first notify the MAC initialization by the RRC; after completion, the MAC notifies the RLC to initialize; After completion, the RLC notifies the PDCP to initialize; after completion, the PDCP notifies the RRC data plane to be initially completed; wherein, the initialization refers to all timers, and the relevant cache takes an initial value.

The method for processing user-faced data according to claim 1, wherein before the initializing each sub-layer of the user plane, the method further includes initializing preparation, where the initialization preparation comprises: RRC suspension All activated radio bearers; resetting the MAC includes stopping all timers of the MAC sublayer, and stopping the random access procedure that may exist and releasing the random access related resources; stopping the packet data interface transmission, releasing the physical layer.

The method for processing user-faced data according to claim 1, wherein the initializing each sub-layer of the user plane, the method further comprises: re-establishing the connection, the re-establishment connection is: RRC initiates a re-establishment request During the re-establishment process, the MAC initiates a random access procedure to ensure that the signaling radio bearer is established, and the control plane data can be sent; after the re-establishment is completed, the signaling radio bearer is restored, and the user equipment waits for the re-establishment message sent by the network side on the signaling radio bearer. And start to configure the three sub-layers of the user plane; after completion, the notification packet data interface continues to be sent, and the data service continues.

The method for processing the user's face data according to any one of claims 1 to 5, wherein the method further comprises: the RRC is generated according to the detection of the user face layer itself. An exception report to determine the generation of dirty data.

A terminal device, comprising: an RRC control unit, configured to initialize each sub-layer of the user plane when a sub-layer generates dirty data on the user plane.

The terminal device according to claim 7, wherein the device further includes a user plane layer unit, and the user plane layer unit includes a MAC module, an RLC module, and a PDCP module.

The terminal device according to claim 8, wherein the device further comprises: an initialization preparation unit, configured to perform preliminary preparation for initializing each sublayer of the user plane; and reconstructing the connection unit for the user plane Each sub-layer performs a post-reconstruction connection that is initialized.

The terminal device according to any one of claims 7 to 9, wherein the terminal device is a line terminal device.