WO2010025679A1 - Method for processing abnormality during the radio link control data block transmission - Google Patents

Abstract

The present invention discloses a method and device for processing abnormality during the Radio Link Control (RLC) data block transmission. The method includes the following steps: a first device transmits an RLC data block, which is in the current transmitting window, to a second device, and receives response information, which is sent by the second device, about the transmission situation of the RLC data block; according to the response information of the current transmission situation, the first device judges that the reception situation of the RLC data block to be judged, which is right, in the response information of the previous transmission situation is misjudged; the first device performs the retransmission process for the RLC data block to be judged. The embodiments of the present invention enable a retransmission process for the RLC data block under the abnormal situation.

Description

 The exception handling method in the process of sending RLC data blocks is filed on September 5, 2008, and the application number is

200810119726.1, entitled "Priority Processing Method in the Process of Sending RLC Data Blocks", the priority of which is incorporated herein by reference. Technical field

 The present invention relates to the field of wireless transmission, and in particular, to an abnormal processing method in an RLC data block transmission process. Background technique

In the Global System for Mobile Communications Enhanced Data Rate for GSM Evolution Radio Access Network (GERAN) system, the minimum scheduling unit for data transmission at the physical layer It is a radio block, and the radio block is divided into two types: a Basic Transmission Time Interval (hereinafter referred to as BTTI) radio block (Block) and a Reduced Transmission Timing Interval (RTTI) radio block. The radio link control (Radio Link Control; RLC) / Media Access Control (MAC) layer above the physical layer, the RLC/MAC block is transmitted, for data transmission, RLC/ A MAC block may contain multiple RLC data blocks. The transmission of the RLC/MAC block is carried by the radio block. Above the RLC/MAC layer is the logical link control (Logic Link Control; hereinafter referred to as: LLC) layer, and the LLC layer transmits LLC frames. Therefore, when data is transmitted, Each LLC frame corresponds to a series of RLC data blocks, and each RLC data block has a corresponding block serial number (BSN) and is transmitted in the order of the BSN. The receiver only submits all RLC data blocks of an LLC frame correctly before it can be submitted to the upper layer processing.

 To optimize data transmission in packet switched mode, RLC block transfers are controlled by feedback mechanisms in both RLC acknowledge mode and non-persistent mode. The feedback mode may be a message mode or a Fast Acknowledgement/Nonacknowledgement Reporting (hereinafter referred to as FANR) mode. The message mode includes a bitmap in the Acknowledgement (hereinafter referred to as ACK)/Negative Answer (NACK) message, and the FANR mode sends a short response/negative response along with the data (Piggy-backed). ACK/NACK; hereinafter referred to as: PAN). The acknowledgement/negative acknowledgement message includes: a packet uplink acknowledgement/negative acknowledgement (PACKET UPLINK ACK/NACK; hereinafter referred to as PUAN) message, an enhanced general packet radio service (hereinafter referred to as EGPRS) packet uplink response/negation Answer (PACKET UPLINK ACK/NACK) message, EGPRS PACKET UPLINK ACK/NACK TYPE 2 message, PACKET DOWNLINK ACK/NACK (hereinafter referred to as PDAN) message , EGPRS PACKET DOWNLINK ACK/NACK message or EGPRS PACKET DOWNLINK ACK/NACK TYPE 2 message. The basic principle of the FANR is to take out the bitmap in the original ACK/NACK message and send it out together with the data. That is, the receiver inserts a bitmap in the RLC/MAC data block and feeds the RLC data in PAN mode. The reception of the block. This achieves both the purpose of feedback and the overhead of signaling.

Feedback mechanisms include polling mechanisms and event-driven mechanisms. The polling mechanism is: The data receiver can Periodically or polled by the sender, feedback on the reception of the data block, and inform the sender which

The RLC data block is received correctly and which RLC data blocks are received incorrectly. The sender receives the feedback and can retransmit the error or missing RLC data block. If the receiver finds an error, it can only send feedback if the feedback period is reached or the sender polls. The event-driven mechanism can notify the sender to retransmit the erroneous RLC data block as soon as possible. Currently, the polling mechanism is used for feedback through the acknowledgement/negative response message, and the polling and event-driven mechanism is used for feedback through the PAN.

 The polling mechanism is applicable to downlink data transmission. The packet control unit (hereinafter referred to as PCU) controls the sending of the polling request, and the transmitting network device uses the sending window to address the RLC data block in the RLC acknowledge mode (RLC). In the transmission window of the Acknowledgement Mode; hereinafter referred to as RLC-AM), the RLC data blocks are respectively represented as unsent, wait for acknowledgment, correct reception, or error reception status. If an RLC data block has not been sent, it is identified as unsent, and the RLC data block is identified as waiting for acknowledgment once it is sent. When the network device receives the packet downlink ACK/NACK message of the mobile terminal of the mobile terminal (hereinafter referred to as MS), it can be known whether the previously transmitted RLC data block is correctly received by the MS. , and update the send window accordingly. If the RLC data block is correctly received, the RLC data block is identified as the correct reception status (ACK); if the reception error or loss, the RLC data block is identified as an error reception status (NACK); if no response information is received Then, the RLC data block is kept waiting for the acknowledgment state. After the send window is updated, it will slide to the position of the first unanswered RLC data block. After the introduction of FANR, the polling mechanism has also changed. On the cornerstone of the original polling mechanism, the fast ACK/NACK of network control is added, that is, the network polls the MS, and the MS can adopt the fast ACK/NACK report (that is, PAN). To answer.

The sending window and receiving window of the network device in GERAN are both 1024, each control message. The length of the packet is 181 bits, except for the overhead of the packet header. The space used by the bitmap for the downlink ACK/NACK message is about 128 bits. If the receiving window exceeds the maximum value of the message carrying the bitmap, one message cannot carry the entire window. The situation requires that the window be reported in segments, so the network device uses the distinction to poll the first part of the bitmap (First Partial Bitma; hereinafter referred to as: FPB) or the next part of the bitmap (hereinafter referred to as: NPB) Control the position of the MS report window, and then get the reception status of the entire window.

 When the receiving window of the MS is greater than the length of the reported message, the status information of the receiving window is further reported to be reported by the FPB and the NPB. When the network device sends the first poll to the MS, the MS is instructed to report the FPB in the PAN mode or the packet data downlink ACK/NACK message reporting manner; then, the network device sends a polling request to the mobile terminal again, indicating that the mobile terminal is in PAN mode or The packet data downlink ACK/NACK message is reported to the NPB; and so on, until the RLC data block status of the entire receiving window is received, it can be known whether the previously transmitted RLC data block is correctly received by the mobile terminal, and the sending window is updated accordingly.

 Regardless of the polling mechanism or the event-driven mechanism, the status of the data block for the send window is:

 If the RLC data block is correctly received, the RLC data block is identified as the correct reception status (ACK); if the reception error or loss, the RLC data block is identified as the error reception status (NACK); if no response information is received , then wait for confirmation status. After the send window is updated, it will slide to the position of the first unanswered RLC data block.

The only difference is that the event-driven FANR receives two more states: the reported status (REPORTED) and the unreported status (UNREPORTED). The RLC data block corresponding to the UNREPORTED state in the receiving window is reported by the PAN or the packet ACK/NACK message. After that, the corresponding state is updated to the REPORTED state. As long as there is an RLC data block in the UNREPORTED state in the receiving window, the terminal inserts a PAN into the RLC/MAC data block. If there are more RLC data blocks in the UNREPORTED state in the receiving window, the terminal will continuously insert the PANs in multiple RLC/MAC data blocks of the same transmission period.

 The current polling feedback mechanism is that the user polls the user at a network interval for a period of time. After receiving the polling command of the network, the user feeds back the packet downlink response/negative response message or the PAN to the network, and carries the downlink data receiving situation; If the network is implemented, the network will send a packet uplink response/negative response message or PAN to the user in the downlink, and carry the uplink data reception status. The event-driven feedback mechanism is that after the terminal finds an error, the terminal can actively send a PAN to feed back the error message without network polling. Summary of the invention

 The embodiment of the present invention provides an exception processing method in an RLC data block sending process, so as to implement retransmission processing of an RLC data block in an abnormal situation.

 An embodiment of the present invention provides an exception processing method in a RLC data block sending process, including: the first device sends a radio link control RLC data block in the current sending window to the second device, and receives the second device. Feedback information of the transmission status of the transmitted RLC data block; according to the feedback information of the current transmission situation, the first device determines that the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission situation is a false alarm; A device performs retransmission processing on the RLC data block to be determined.

According to the embodiment of the present invention, the false alarm scenario of the correct reception condition of the RLC data block may be analyzed according to the feedback information of the current transmission situation to determine the number of RLCs that are correctly received by the false alarm. According to the block, the re-send processing of the correctly received RLC data block is performed to ensure the correct transmission of the RLC data block, and no new message needs to be added in the whole process of the judgment and processing of the false alarm scene. It has good compatibility with the prior art and is an effective perfection and useful supplement to the abnormal processes that may occur in the prior art. DRAWINGS

 1 is a flow chart of Embodiment 1 of an exception processing method in a process of transmitting an RLC data block according to the present invention;

 2 is a flow chart of Embodiment 2 of an exception processing method in an RLC data block sending process according to the present invention;

 3 is a flow chart of Embodiment 3 of an exception processing method in an RLC data block sending process according to the present invention;

 4 is a flow chart of Embodiment 4 of an exception processing method in an RLC data block sending process according to the present invention;

 FIG. 5 is a flow chart of Embodiment 5 of an exception processing method in an RLC data block sending process according to the present invention. detailed description

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

 FIG. 1 is a flow chart of Embodiment 1 of an exception processing method in an RLC data block sending process according to the present invention. As shown in Figure 1, it includes:

Step 11: The first device sends the radio link control RLC in the current sending window to the second device. Data block, and receiving feedback information of the RLC data block transmission situation sent by the second device; Step 12, the first device according to the feedback information of the current transmission situation (hereinafter referred to as "this feedback information" in the following embodiment) Determining whether the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission situation (referred to as "previous feedback information" in the following embodiment is a false alarm); Step 13: determining the feedback information of the previous transmission condition to be determined When the correct reception condition of the RLC data block is a false alarm, the RLC data block to be determined is retransmitted.

 In the RLC acknowledgement mode, the embodiment of the exception handling method in the RLC data block transmission process of the present invention is described by the following three cases:

 (1) The first device determines, according to the previous feedback information sent by the second device, and the current feedback information, whether the correct reception condition of the RLC data block to be determined in the previous feedback information is a false alarm.

 (2) The first device determines, according to the current feedback information sent by the second device, whether the RLC data block involved in the feedback information is included in the current sending window, and determines whether the sending window slips, that is, determines the previous feedback information. Whether the correct reception condition of the RLC data block to be determined is a false alarm.

 (3) The second device determines, according to the RLC data block that it actually receives, whether the RLC data block is outside the RLC data block that is expected to be received in the receiving window of the second device, and determines whether the sending window slips, that is, determines the previous feedback information. Whether the correct reception condition of the RLC data block to be determined is a false alarm.

 FIG. 2 is a flow chart of Embodiment 2 of an exception processing method in an RLC data block sending process according to the present invention. As shown in Figure 2, it includes:

 Step 21: The first device sends the radio link control RLC data block in the current sending window to the second device.

Step 22: The first device receives feedback of the sending situation of the RLC data block sent by the second device Information

 Step 23: If the receiving condition of the RLC data block in the feedback information is received by the first device, and the receiving condition of the RLC data block in the previous feedback information is correctly received, the RLC data block is the RLC data to be determined. Block, determining that the correct reception condition of the RLC data block to be determined in the previous feedback information is a false alarm;

 Step 24: The first device performs retransmission processing on the to-be-determined RLC data block.

 It is assumed that in this embodiment, the first device as the sender is the network, and the second device as the receiver is the terminal. The network as the first device sends the RLC data block to the terminal as the second device. When the network receives the current feedback information reported by the terminal, the current feedback information may be a subsequent PAN message sent by the terminal or a polling response. The PDAN message is found to be inconsistent with the response status of the RLC data block reception status in the feedback information of the previous transmission information. For example, in this embodiment, the reception status of an RLC data block in the feedback information is If the receiving condition of the RLC data block in the previous feedback information is correct, the correct receiving condition of the RLC data block to be determined in the previous feedback information may be determined as a false alarm, and the network as the first device needs to be determined. The RLC data block is retransmitted.

 The re-transmission processing of the RLC data block to be determined by the network as the first device includes: if the RLC data block to be determined still exists in the transmission buffer or the transmission window of the network, the network may directly retransmit the RLC data to be determined. If the RLC data block to be determined has been deleted from the sending buffer or the sending window by the network, the network may command to release the TBF corresponding to the RLC data block to be determined, and after the abnormal translation, the network may try to re-access, that is, After the TBF is reconstructed, the RLC data block to be determined is retransmitted.

FIG. 3 is a flowchart of Embodiment 3 of an exception processing method in an RLC data block sending process according to the present invention. As shown in Figure 3, it includes: Step 31: The first device sends the radio link control RLC data block in the current sending window to the second device.

 Step 32: The first device receives feedback information about the sending situation of the RLC data block sent by the second device.

 Step 33: If the first device receives the feedback information, the receiving condition of an RLC data block in the feedback information is erroneously received, and the block number of the RLC data block is smaller than the current sending window of the first device. a minimum block number of the RLC data block that has been sent, and the RLC data block is a RLC data block to be determined, and then determining that the correct reception condition of the RLC data block to be determined in the previous feedback information is an error;

 Step 34: The first device performs retransmission processing on the to-be-determined RLC data block.

 In this feedback information, the first device may receive an error reception condition of the RLC data block that is lower than the lowest block number of the RLC data block in the transmission window, because if the feedback information is correct, Then, the first device receives a response of the block number that is so low, indicating that the second device receives an RLC data block lower than the lowest block number of the RLC data block in the sending window, indicating that the first device is based on a previous error. The message is reported, and the transmission window is erroneously slid. Therefore, it is necessary to perform retransmission processing on the RLC data block involved in the false alarm information.

 In this feedback information, the first device cannot receive the correct reception of the RLC data block higher than the highest block number of the RLC data block in the transmission window outside the transmission window, because if the feedback information is correct Then, the first device receives the response of the block number of the high, indicating that the second device receives the RLC data block higher than the highest block sequence number of the RLC data block in the sending window, but the first device does not actually have The data block is sent, so the second device is simply not possible to receive.

It is assumed that in this embodiment, the first device as the sender is the network, and the second device as the receiver Prepared as a terminal. The network as the first device sends the RLC data block to the terminal as the second device. When the network waits for the current feedback information reported by the terminal, it is found that the reception condition of an RLC data block in the feedback information is erroneously received, and the RLC is received. The data block is again outside the current transmission window, indicating that the RLC data block is not correctly received by the second device, and the RLC data block is the RLC data block to be determined, and the correct reception of the determined RLC data block in the previous feedback information. The situation is a false positive, so the transmission window is erroneously slid, that is, an RLC data block larger than the largest block number of the RLC data block that the second device expects to receive is transmitted. If the first device sends the RLC data packet with BSN = 1, BSN = 2, BSN = 3, BSN = 4, and BSN = 5 to the second device, the previous feedback information sent by the second device includes BSN = 1, BSN = 2, BSN = 3, BSN = 4, BSN = 5, the correct reception of the RLC data block, the current device's current transmission window slides to the RLC data block corresponding to BSN = 6; The feedback information of the receiving situation includes that the data block with BSN = 4 is erroneous reception, BSN = 4 is smaller than the minimum block number BSN = 6 of the RLC data block in the current transmission window, so it can be judged that the transmission window is erroneously slid, before The correct reception condition of the data block with BSN = 4 in the transmission information is FALSE POSITIVE, so the data block corresponding to BSN = 4 needs to be retransmitted.

 In this embodiment, the feedback information may be a PDAN message of a polling response.

 The re-transmission processing of the RLC data block to be determined by the network as the first device includes: if the RLC data block to be determined still exists in the transmission buffer or the transmission window of the network, the network may directly retransmit the RLC data to be determined. If the RLC data block to be determined has been deleted from the sending buffer or the sending window by the network, the network may command to release the TBF corresponding to the RLC data block to be determined, and after the abnormal translation, the network may try to re-access, that is, After the TBF is reconstructed, the RLC data block to be determined is retransmitted.

4 is a flow chart of Embodiment 4 of an exception processing method in an RLC data block sending process of the present invention Figure. As shown in Figure 4, it includes:

 Step 41: The first device sends the radio link control RLC data block in the current sending window to the second device.

 Step 42: The second device receives the RLC data block sent by the first device, if the RLC data block that is expected to be received in the receiving window of the second device includes the RLC data block to be determined, if the RLC data block received by the second device is the smallest If the block number is greater than the block number of the RLC data block to be determined, the second device determines that the correct reception condition of the RLC data block to be determined in the previous feedback information is a false alarm; Step 43: The second device determines the correct RLC data block to be determined. The information that the receiving situation is false alarm is loaded in the feedback information and sent to the first device;

 Step 44: The first device determines whether the correct reception condition of the RLC data block to be determined in the previous feedback information is a false alarm;

 Step 45: The first device performs retransmission processing on the to-be-determined RLC data block.

 It is assumed that in this embodiment, the first device as the sender is the terminal, and the second device as the receiver is the network. The terminal as the first device sends the RLC data block to the network as the second device, and when the second device determines that the correct reception condition in the previous feedback information is a false alarm, the correct reception condition of the RLC data block to be determined is incorrect. The reported information is loaded in the feedback information and sent to the first device; the first device performs retransmission processing on the RLC data block to be determined.

 In this embodiment, the feedback information may be a PUAN message.

The retransmission process of the RLC data block to be determined by the terminal as the first device includes: if the RLC data block to be determined still exists in the sending buffer or the sending window of the terminal, the terminal may directly resend the RLC data to be determined. If the RLC data block to be determined has been deleted from the transmission buffer or the transmission window by the network, it cannot be directly retransmitted, causing the transmission window to stagnate, when the network expires after the timer expires. When the RLC data block that is expected to be received is still not received, the TBF corresponding to the RLC data block to be determined may be interpreted, and the abnormality may be re-interpreted after re-translation, that is, after the TBF is reconstructed, the RLC data to be determined is re-transmitted. Piece. Generally, the reliability of the PDAN message or the PUAN message is high. If the feedback information is PDAN message or PUAN message in the third and fourth embodiments, the feedback information can be considered as correct. Therefore, the transmission situation is correct. The reception of the RLC data block carried in the feedback information indicates the actual reception situation, and the occurrence of the false alarm may only occur in the previous feedback information.

 Generally, the reliability of the PAN message is low. If the feedback information is a PAN message, the feedback information may be correct or incorrect. The abnormal situation may be the previous feedback information, or it may be This feedback.

 The following describes an exception handling method in the process of sending an RLC data block provided by the embodiment of the present invention when the feedback information is a PAN message.

 FIG. 5 is a flow chart of Embodiment 5 of an exception processing method in an RLC data block sending process according to the present invention. As shown in Figure 5, it includes:

 Step 51: The first device sends the radio link control RLC data block in the current sending window to the second device.

 Step 52: The second device reports the current feedback information to the first device, where the feedback information is a PAN message.

 Step 53: The first device determines whether the block sequence number of the RLC data block to be determined is greater than a maximum block number of the RLC data block that has been sent in the current sending window of the first device, if the step 54 is performed; otherwise, the step is performed. 55.

Step 54: If the block number of the RLC data block to be determined is greater than the maximum block number of the RLC data block that has been sent in the current sending window of the first device, according to the feedback information to be determined in the current feedback information The receiving condition of the RLC data block is correctly received, and it can be determined that the correct reception condition of the RLC data block to be determined in the feedback information is a false alarm, and the first device does not perform retransmission processing on the RLC data block to be determined.

 In this feedback information, when the first device receives the correct reception status of the RLC data block whose block number is higher than the maximum block number of the RLC data block in the current transmission window of the first device, the RLC is to be determined. The block number of the data block is higher than the block number of the RLC data block in the current transmission window of the first device, indicating that the RLC data block to be determined is outside the current transmission window and the block number is higher than the current device of the first device. The block number of the RLC data block in the transmission window is still high. If the reception condition of the RLC data block to be determined in the feedback information is correctly received, it indicates that the correct reception of the data block in the feedback information is definitely a false alarm. Even if it is assumed that the feedback information of the current transmission information is correct, it indicates that the first device must receive an RLC data block higher than the maximum block number of the RLC data block in the current transmission window of the first device, and the first device is fundamentally this time. The data block is not sent, so the second device does not receive it at all, so when the first device receives the RLC data block whose block number is higher than the block number of the RLC data block in the current transmission window of the first device. When receiving the situation, it can also be positively determined that the correct reception of the data block in the feedback information is false positive. The RLC data block whose block number is higher than the maximum block number of the RLC data block in the current transmission window of the first device is actually not expected to be received by the second device, because the transmission window has not been slid to this time. The maximum block number of the RLC data block in the transmission window is also higher than the RLC data block, so there is no need to perform retransmission processing for this type of RLC data block.

In the feedback information, when the first device receives the error reception of the RLC data block whose block number is lower than the block number of the RLC data block in the current transmission window of the first device, or the first device receives the first The erroneous reception of the RLC data block in the transmission window of a device, but the RLC data block in the previous feedback information corresponds to the positive reception, since the feedback information is a PAN message, This feedback may be reliable or unreliable. The following is assuming that the feedback information is reliable, and it is assumed that the feedback information is unreliable, and the previous feedback information or the correct/false reception of the data block to be determined in the feedback information is determined.

 Step 55: If the RLC data block to be determined is within the current transmission window or the RLC data block to be determined is smaller than the smallest block number of the RLC data block that has been sent in the current transmission window of the first device, assume this time When the feedback information is reliable, if the block number of the RLC data block to be determined is smaller than the minimum block number of the RLC data block that has been sent in the current transmission window of the first device, step 561 is performed, if the RLC data block to be determined is in the When the RLC data block that has been sent in the current transmission window of the first device is performed, step 562 is performed; if the feedback information is unreliable, if the block number of the RLC data block to be determined is smaller than the first device When the minimum block number of the RLC data block that has been sent in the secondary transmission window is performed, step 571 is performed, if the RLC data block to be determined is within the RLC data block that has been sent in the current transmission window of the first device, the steps are performed. 572.

 Step 561: If the block sequence number of the RLC data block to be determined is smaller than the minimum block number of the RLC data block that has been sent in the current sending window of the first device, according to the receiving information of the RLC data block to be determined in the feedback information. For the negative response, it is determined that the correct reception condition of the RLC data block to be determined in the previous feedback information is a false alarm.

 Step 562: If the RLC data block to be determined is within the RLC data block that has been sent in the current sending window of the first device, according to the received information of the RLC data block to be determined in the feedback information, the error is received. In the previous feedback information, the RLC data block reception condition to be determined is correctly received, and it is determined that the correct reception condition of the RLC data block to be determined in the previous feedback information is a false alarm.

Step 571: If the block number of the RLC data block to be determined is smaller than the minimum block number of the RLC data block that has been sent in the current sending window of the first device, according to the feedback information to be determined in the current feedback information. The RLC data block reception condition is an erroneous reception, and it is determined that the error reception condition of the RLC data block to be determined in the current feedback information is a false alarm.

 Step 572: If the RLC data block to be determined is within the RLC data block that has been sent in the current transmission window of the first device, according to the received information of the RLC data block to be determined in the feedback information, the error is received. In the previous feedback information, the RLC data block reception condition to be determined is correctly received, and it is determined that the error reception condition of the RLC data block to be determined in the current feedback information is a false alarm.

 The above steps 561 and 562 are based on the assumption that the feedback information is reliable. When the first device determines that the correct reception condition of the RLC data block to be determined in the previous feedback information is a false alarm, the first device performs a retransmission process. Steps 561 and 562 further include:

 Step 58: The first device performs retransmission processing on the to-be-determined RLC data block. Specifically, when the feedback information is actually inconsistent with the actual situation, that is, the error receiving condition of the data block to be determined in the current feedback information is a false alarm, that is, the second device has actually received the error correctly. The RLC data block, in which the first device retransmits the RLC data block, causes the RLC data block to be sent once, which causes waste of resources.

 The above steps 571 and 572 are based on the assumption that the feedback information is unreliable. When the first device determines that the correct reception condition of the RLC data block to be determined in the feedback information is false alarm, the first device performs retransmission. deal with. Steps 571 and 572 further include:

 Step 59: The first device does not perform retransmission processing on the to-be-determined RLC data block.

When the feedback information is actually in accordance with the actual situation, that is, the correct reception condition of the data block to be determined in the previous feedback information is a false alarm, that is, the second device does not actually receive the RLC data block correctly. At this time, the first device does not perform retransmission processing on the RLC data block, which causes the first device to erroneously slide the transmission window, that is, sends the RLC data that is expected to be received by the second device. The largest block number of the block is also a large RLC data block. In this case, the subsequent processing can be performed as described in the third embodiment and the fourth embodiment.

 The assumption that the feedback information is reliable and unreliable in this embodiment assumes that possible waste of resources when the feedback information is reliable. When it is assumed that the feedback information is unreliable, the feedback is assumed. The process of reliable information processing is complicated, but it does not cause possible waste of resources. Therefore, from the viewpoint of saving resources and improving resource utilization, it is assumed that the process of unreliable feedback information is a preferred example of the embodiment.

 In the above embodiment of the present invention, according to the feedback information of the current transmission situation, the false alarm scenario of the correct reception condition of the RLC data block may be analyzed to determine the false positive report as the correctly received RLC data block, and then the errors are The retransmission process is performed for the correctly received RLC data block to ensure the correct transmission of the RLC data block. In the whole process of the judgment and processing of the false alarm scenario, no new message needs to be added, and the prior art has good performance. Compatibility, and is an effective complement and useful complement to the anomalous processes that may occur in the prior art.

 A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

 It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request A method for processing an exception in the process of sending an RLC data block, comprising: transmitting, by the first device, a radio link control RLC data block in the current transmission window to the second device, and receiving the second device Feedback information of the transmission status of the transmitted RLC data block;  According to the feedback information of the current transmission situation, the first device determines that the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission situation is a false alarm;  The first device performs retransmission processing on the to-be-determined RLC data block.  The method according to claim 1, wherein, according to the feedback information of the current transmission situation, the first device determines that the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission situation is an error. The report includes:  If the receiving condition of one RLC data block in the feedback information of the current sending situation received by the first device is an erroneous receiving, and the receiving condition of the one RLC data block in the feedback information of the previous sending situation is correct receiving, The RLC data block is the RLC data block to be determined, and the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission condition is determined to be a false alarm.  The method according to claim 1, wherein, according to the feedback information of the current transmission situation, the first device determines that the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission situation is an error. The report includes: If the receiving condition of one RLC data block in the feedback information of the current sending situation received by the first device is an erroneous receiving, and the block number of the one RLC data block is smaller than the current sending window of the first device The smallest block number of the transmitted RLC data block, where the one RLC data block is the RLC data block to be determined, and the RLC to be determined in the feedback information of the previous transmission situation is determined. The correct reception of the data block is a false alarm.  The method according to claim 1, wherein, according to the feedback information of the current transmission situation, the first device determines that the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission situation is an error. The report includes:  Receiving, by the second device, the RLC data block that is sent by the first device, if the RLC data block that is expected to be received in the receiving window of the second device includes a RLC data block to be determined, if the second device receives The minimum block number of the RLC data block is greater than the block number of the RLC data block to be determined, and the second device determines that the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission condition is a false alarm;  The second device adds the information that the correct reception condition of the RLC data block to be determined is a false alarm to the feedback information of the current transmission situation, and sends the information to the first device;  The first device determines that the correct reception condition of the RLC data block to be determined in the feedback information of the previous transmission situation is a false alarm.  The method according to claim 2 or 3, wherein the feedback information of the current transmission situation is a short response/negative acknowledgement PAN message or a packet downlink acknowledgement/negative acknowledgement PDAN message.  The method according to claim 5, wherein the first device is a network, and the second device is a terminal.  The method according to claim 4, wherein the feedback information of the current transmission situation is a packet uplink acknowledgement/negative acknowledgement PUAN message. The method according to claim 7, wherein the first device is a terminal, and the second device is a network. 9. A computer readable storage medium, wherein the computer readable storage medium stores computer program code, the computer program code causing the computer to execute a right when the computer program code is executed by a computer The steps of any of 1 to 8 are required.  A computer program code, wherein the computer code causes the computer to perform the method of any one of claims 1 to 8 when the computer program code is executed by a computer.