WO2012155427A1

WO2012155427A1 - Data processing method, apparatus and packet data convergence protocol layer module

Info

Publication number: WO2012155427A1
Application number: PCT/CN2011/080029
Authority: WO
Inventors: 王达菲
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-07-25
Filing date: 2011-09-22
Publication date: 2012-11-22
Also published as: CN102905310A

Abstract

The present invention provides a data processing method, apparatus and Packet Data Convergence Protocol (PDCP) layer module. The method comprises: a PDCP layer sets a sending timer for a received uplink message or uplink forwarding message; if it is detected that residence time for the uplink message or uplink forwarding message in an uplink reception sliding window is longer than the timing length of the sending timer, then the message is sent to an upper layer. The present invention can ensure that PDCP uplink messages or PDCP uplink forwarding messages are sent to the upper layer successfully.

Description

Data processing method, device and packet data convergence protocol layer module

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a PDCP (Packet Data Convergence Protocol) layer processing method, a device, and a packet data convergence protocol layer module. Background technique

1 is a schematic diagram of a LTE (Long Term Evolution) user plane protocol stack in the prior art. As shown in FIG. 1, an eNB (E-URTAN NodeB, an evolved terrestrial radio access network node B) and a UE (User Equipment) In the protocol stack of the user equipment, the upper layer to the lower layer include: a PDCP layer, an RLC (Radio Link Control) layer, a MAC (Medium Access Control) layer, and a PHY (Physical Layer) layer. When the transmitting end needs to transmit the service data to the receiving end, the transmitting end processes the received service data through the PDCP layer, the RLC layer, and the MAC layer of the eNB, and finally reaches the PHY layer of the transmitting end, and the transmitting end sends the service through the physical path of the PHY layer. The PHY layer to the receiving end is processed by the MAC layer, the RLC layer, and the PDCP layer of the receiving end, and delivered to the upper layer of the receiving end. The sending end and the receiving end may be an eNB and a UE, respectively, or may be a UE and an eNB, respectively.

During the transmission from the lower layer to the upper layer, the PDCP firstly removes the received PDCP PDU (Protocol Data Unit) from the PDCP header, decrypts it, and then decompresses it to form the SDP (Service Data Unit of the PDCP). Service data unit), then deliver the PDCP's SDU to the upper layer. The PDCP header includes a sequence number (SN) for indicating the transmission order of each PDCP SDU. The SN is called a PDCP SN.

However, according to the existing processing mechanism, there are some scenarios in which the SDU cannot be delivered to the upper layer. For example, if re-establishment occurs, the PDCP SN = 0, 2, 3 packets in the PDCP uplink receiving sliding window of the eNB, if In the PDCP uplink transmission buffer of the UE, only PDCP SN = 0, 1, 2, 3 messages, and 0, 2, 3 are reported to be discarded by the eNB, and the message with SN = 1 is due to The discardTimer (discard timer) expires and is discarded. If the UE has no new data to be sent, then 0, 2, 3 will stay in the eNB uplink receiving window and cannot be delivered upward. Summary of the invention

The technical problem to be solved by the present invention is to provide a data processing method, a device, and a packet data convergence protocol layer module, so as to ensure that PDCP uplink messages or PDCP uplink forwarding messages can be successfully delivered to the upper layer.

In order to solve the above technical problem, the present invention provides a data processing method, including: the packet data convergence protocol layer sets a delivery timer for the received uplink packet or the uplink forwarding packet;

If it is detected that the staying time of the uplink packet or the uplink forwarding packet in the uplink receiving sliding window exceeds the timing of the delivery timer, the packet is delivered to the upper layer.

Preferably, the above method also has the following features:

The packet data convergence protocol layer sets a delivery timer for the received uplink message during the service re-establishment process.

Preferably, the above method also has the following features:

The packet data convergence protocol layer sets a delivery timer for the received uplink forwarding message during the service switching process.

In order to solve the above problems, the present invention further provides a packet data convergence protocol layer module, including:

The setting unit is configured to set a delivery timer for the received uplink packet or the uplink forwarding packet, and the detecting unit is configured to detect whether the staying time of the uplink packet or the uplink forwarding packet in the uplink receiving sliding window exceeds Describe the timing of the delivery timer;

a delivery unit, configured to: when the detecting unit detects that the staying time of the uplink packet or the uplink forwarding packet in the uplink receiving sliding window exceeds a timing duration of the delivery timer, The text is delivered to the upper layer.

Preferably, the foregoing packet data convergence protocol layer module further has the following features:

The setting unit is configured to set a delivery timer for the received uplink message during the service re-establishment process. Preferably, the foregoing packet data convergence protocol layer module further has the following features:

The setting unit is configured to set a delivery timer for the received uplink forwarding message during the service switching process.

In order to solve the above problems, the present invention also provides a data processing apparatus comprising the above-described packet data convergence protocol layer module.

Preferably, the above data processing device further has the following features:

The data processing device includes: a terminal or a base station.

In summary, the data processing method, the device, and the packet data convergence protocol layer module of the foregoing technical solution can ensure that the PDCP uplink packet or the PDCP uplink forwarding packet can be successfully sent to the upper layer. BRIEF abstract

FIG. 1 is a schematic diagram of an LTE user plane protocol stack;

2 is a schematic diagram of a PDCP module according to an embodiment of the present invention;

3 is a schematic diagram of a data processing apparatus according to an embodiment of the present invention;

4 is a flowchart of a data processing method according to an embodiment of the present invention;

5 is a flowchart of a data processing method according to an application example 1 of the present invention;

6 is a flowchart of a data processing method of Application Example 2 of the present invention. Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. 2 is a schematic diagram of a PDCP module according to an embodiment of the present invention. As shown in FIG. 2, the PDCP module of this embodiment includes:

The setting unit is configured to set a delivery timer for the received uplink packet or the uplink forwarding packet, and the detecting unit is configured to detect whether the staying time of the uplink packet or the uplink forwarding packet in the uplink receiving sliding window exceeds Describe the timing of the delivery timer; a delivery unit, configured to: when the detecting unit detects that the staying time of the uplink packet or the uplink forwarding packet in the uplink receiving sliding window exceeds a timing duration of the delivery timer, The text is delivered to the upper layer.

FIG. 3 is a schematic diagram of a data processing apparatus according to an embodiment of the present invention. As shown in FIG. 3, the data processing apparatus of this embodiment includes the above-described PDCP module.

The data processing device in this embodiment may be a terminal or a base station.

FIG. 4 is a flowchart of a data processing method according to an embodiment of the present invention. As shown in FIG. 4, the method in this embodiment includes the following steps:

S10. The PDCP layer sets a delivery timer for the received uplink packet or the uplink forwarding packet.

S20. If it is detected that the staying time of the uplink packet or the uplink forwarding packet exceeds the timing of the delivery timer, the text is sent to the upper layer.

In this embodiment, the PDCP layer sets a deliverTimer (delivery timer) for the message. When the message stays in the receiving window, if the time exceeds the deliverTimer, the message is delivered to the upper layer.

According to the method of the embodiment, the PDCP uplink packet or the uplink forwarding packet can be successfully delivered to the upper layer, which improves the success rate of the service data transmission and improves the user experience.

Application example 1, as shown in Figure 5, includes the following steps:

Step 201: A service re-establishment occurs, and the PDCP uplink receiving sliding window of the eNB receives the uplink packet of the PDCP SN = 0, 2, 3, and starts a delivery timer for the uplink packet, where the UE uplink sending buffer exists. PDCP SN = 0, 1, 2, 3 messages.

Step 202: The eNB sends a status report to the UE, and informs the UE to discard the packets with the PDCP SN=0, 2, and 3.

Step 203: The UE receives the status report, and discards the packets with the PDCP SN=0, 2, and 3.

Step 204: A packet with a PDCP SN of 1 in the uplink transmission buffer of the UE is not sent in time due to scheduling or other reasons, and the drop timer expires and is discarded by the UE.

Step 205: The eNB uplink receives the PDCP SN = 0, 2, and 3 packets in the sliding window due to the vote. The timer expires and the message is delivered to the upper layer.

Application example 2, as shown in Figure 6, includes the following steps:

Step 301: When a service handover occurs, the destination eNB receives the PDCP SN = 1, 2, and 3 packets forwarded by the source eNB, and starts a delivery timer for the packets, where the UE sends the PDCP uplink buffer. Only PDCP SN = 0, 1, 2, 3 messages.

Step 302: The PDCP SN = 1 message is lost during the uplink transmission process. Step 303: The eNB of the destination side only receives the 4 艮 message of PDCP SN = 2, 3.

Step 304: The eNB sends a status report to the UE, and informs the UE to discard the packets with the PDCP SN=1, 2, and 3.

Step 305: The UE receives the status report, and discards the packets with the PDCP SN=1, 2, and 3.

Step 306: The UE delivers the packet with the PDCP SN=0 to the destination eNB.

Step 307: After receiving the packet with the PDCP SN = 0, the eNB on the destination side delivers the packet to the upper layer. Step 308: The destination side eNB receives the data of the PDCP SN = 2, 3 in the sliding window, and the delivery timer expires to the upper layer.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. Embodiments of the invention are not limited to any particular form of combination of hardware and software.

The above is only a preferred embodiment of the present invention, and of course, there may be other various embodiments of the present invention, and those skilled in the art can implement the present invention without departing from the spirit and scope of the present invention. Various changes and modifications can be made in the manner of the invention, and the corresponding changes and modifications are intended to fall within the scope of the appended claims. Industrial applicability

The foregoing technical solution provides a data processing method, a device, and a packet data convergence protocol layer module, and sets a delivery timer for the received uplink packet or the uplink forwarding packet by using a packet data convergence protocol layer, and if the uplink packet is detected, Or the timeout period of the uplink forwarding packet in the uplink receiving sliding window exceeds the timing of the delivery timer, and the packet is delivered to the upper layer to ensure that the PDCP uplink packet or the PDCP uplink forwarding packet can be successfully uplinked. Layer delivery.

Claims

1. A data processing method, comprising:

The packet data convergence protocol layer sets a delivery timer for the received uplink packet or the uplink forwarding packet;

If it is detected that the staying time of the uplink packet or the uplink forwarding packet in the uplink receiving sliding window exceeds the timing of the delivery timer, the uplink or uplink forwarding text is sent to the upper layer.

2. The method of claim 1 wherein:

In the step of the packet data convergence protocol layer setting a delivery timer for the received uplink packet or the uplink forwarding packet, the packet data convergence protocol layer is configured to receive the received uplink packet during the service re-establishment process. Delivery timer.

3. The method of claim 1 wherein:

In the step of the packet data convergence protocol layer setting a delivery timer for the received uplink packet or the uplink forwarding packet, the packet data convergence protocol layer is configured to receive the received uplink forwarding packet during the service switching process. Delivery timer.

4. A packet data convergence protocol layer module, comprising:

a setting unit, configured to set a delivery timer for the received uplink message or the uplink forwarding message;

a detecting unit, configured to detect whether a duration of staying in the uplink receiving sliding window of the uplink packet or the uplink forwarding packet exceeds a timing duration of the delivery timer;

a delivery unit, configured to: when the detecting unit detects that the staying time of the uplink packet or the uplink forwarding packet in the uplink receiving sliding window exceeds a timing duration of the delivery timer, ^ The text is delivered to the upper layer.

5. The packet data convergence protocol layer module of claim 4, wherein:

The setting unit is configured to: set a delivery timer for the received uplink message during the service re-establishment process.

6. The packet data convergence protocol layer module of claim 4, wherein: The setting unit is configured to: set a delivery timer for the received uplink forwarding message during the service switching process.

A data processing apparatus comprising the packet data convergence protocol layer module according to any one of claims 4-6.

8. The device of claim 7

It is a terminal or a base station.