WO2009010011A1 - Method and apparatus for detecting data loss of radio link control layer - Google Patents

Abstract

A method and apparatus for detecting data lose of radio link control layer are provided. The method includes: when missing data is found by a radio link control layer entity, detecting the data transmission information on the first data, wherein the transmission time of the first data is earlier than the transmission time of the second data and the second data is the data which causes the loss of the missing data; determining the missing data according to the detected data transmission information. According to the embodiments of the invention, the workload of user equipment is reduced and the efficiency of the detection of data loss is improved in radio link control layer, compared with the prior art that needs to monitor all the procedures of data transmission in addition to the procedure of the transmission of the hybrid automatic retransmission requesting data that causes the loss of serial numbers.

Description

 Method and device for detecting data loss of wireless link control layer

Technical field

 The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for detecting data loss in a radio link control layer. Background technique

 The Universal Mobile Telecommunication System (UMTS) is one of the world's leading third-generation mobile communication systems. Based on UMTS High Speed Downlink Packet Access (HSDPA) technology and High Speed Uplink Packet Access (HSUPA) technology, peak rate and spectral efficiency can be improved. In the prior art, in order to realize high-speed transmission of services, a Media Access Control (MAC) sub-layer protocol entity is newly added to the HSDPA and HSUPA technologies, and a hybrid automatic retransmission is introduced in the media access control entity. Hybrid Automatic Repeat Request (HARQ) technology, which is based on the retransmission of the physical layer. When the receiving end receives the data of the transmitting end, if the received data is judged to be incorrect, the data transmission rate is increased and reduced by fast retransmission. Packet loss rate, while increasing system throughput.

 The hybrid automatic repeat request has multiple processes in parallel, and the data received by the receiver is likely to be out of order, which means that the upper layer of the media access control layer, that is, the Radio Link Control (RLC) layer. The received data may also be out of order, so the radio link control layer cannot judge the loss of the layer data according to the missing sequence number from the received data.

In the prior art, when the radio link control layer detects that the serial number is missing, the hybrid automatic retransmission request data transmission process starts timing, except that the hybrid automatic retransmission request data transmission process that causes the serial number missing is not started. Device. When the data transmission process started by the timer receives new data or new data indication, the timer is stopped; when all the started timers exceed the preset time, and the serial number is still missing, the missing is confirmed. The data has been lost. In the above method, when the serial number of the radio link control layer is missing, it is necessary to monitor all data transmission processes except the hybrid automatic repeat request data transmission process that causes the serial number missing, and some of the data may not be transmitted in the process. The serial number is missing data, and the method is obviously superfluous to monitor these processes, which increases the workload of the user equipment and prolongs the waiting time. Summary of the invention

 The technical problem to be solved by the embodiments of the present invention is to provide a method and a device for detecting data loss of a radio link control layer, which can reduce the workload of the user equipment and quickly detect the loss of data of the radio link control layer.

 In order to achieve the above object, an embodiment of the present invention provides a method for detecting data loss of a radio link control layer, including: detecting, when a radio link control layer entity finds missing data, data transmission information of the first data, The sending time of the first data is earlier than the sending time of the second data, the second data is data causing the missing data to be missing; and the lost data is confirmed according to the detected data transmission information.

 In order to achieve the above object, an embodiment of the present invention further provides an apparatus for detecting data loss of a radio link control layer, including: a data receiving unit, configured to receive data sent by a medium access control layer and a sending time of the data; a data loss detecting unit, configured to detect data transmission information of the first data when the data is found to be missing, the sending time of the first data is earlier than the sending time of the second data, and the second data is caused by the missing Data missing from the data; and the lost data is confirmed based on the data transmission information.

The above technical solution can be seen that, because the order of sending data by the transmitting end by using the hybrid automatic repeat request process is consistent with the time sequence of sending data by the hybrid automatic repeat request process, when the radio link control layer entity finds that data is missing, The process of causing the data to be deleted may only be a process that is earlier than the time when the data causing the missing sequence number is sent. Therefore, in the solution provided by the embodiment of the present invention, the information is taken to confirm the lost data, and the prior art needs to be monitored. a mixture that causes missing serial numbers Compared with all data transmission processes outside the automatic data transmission request data transmission process, the workload of the user equipment is reduced, and the efficiency of detecting data loss of the radio link control layer is improved. DRAWINGS

 1 is a flowchart of a method according to Embodiment 1 of the present invention;

 2 is a schematic diagram of a method for detecting data loss of a radio link control layer according to Embodiment 1 of the present invention;

 3 is a structural diagram of a device according to Embodiment 2 of the present invention;

 4 is a flowchart of a method provided by Embodiment 3 of the present invention;

 FIG. 5 is a schematic diagram of a method for detecting data loss of a radio link control layer according to Embodiment 3 of the present invention; FIG.

 6 is a structural diagram of a device according to Embodiment 4 of the present invention;

 7 is a flowchart of a method according to Embodiment 5 of the present invention;

 FIG. 8 is a structural diagram of a device according to Embodiment 6 of the present invention. detailed description

 The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. Embodiment 1

 An embodiment of the present invention provides a method for detecting data loss of a radio link control layer. As shown in FIG. 1, the method includes:

 Step 101: The media access control layer entity records a data sending time, and sends the data sending time and data corresponding to the time to the radio link control layer entity.

The entity in the media access control layer may be a hybrid automatic repeat request entity. The data transmission time is usually the initial transmission time of the data. In this embodiment, the initial transmission time of the data is directly recorded by the receiving end of the hybrid automatic repeat request entity; or the time when the data is correctly received after relinquishing the data transmission time or retransmission is subtracted from the time used for the retransmission to obtain the initial data transmission. Delivery time.

 The data transmission time may be sent to the wireless link layer entity by the hybrid automatic repeat request entity; or the hybrid automatic retransmission entity may record the time and the data corresponding to the time after correctly receiving the data. Submitted to the upper layer entity of the media access control layer, and submitted by the upper layer entity to the radio link control layer entity; or the hybrid automatic retransmission entity can record the time and the data corresponding to the time after correctly receiving the data. Directly sent to the radio link control layer entity.

 When a hybrid automatic repeat request entity sends data to a radio link control layer entity, there are at least two parallel processes. For each process, each time the receiving end of the hybrid automatic repeat request entity receives a data, the connection frame number and the subframe number of the data can be obtained through parameters transmitted by the physical channel, and the two parameters indicate that the sender sends the data. The time of the data.

 In addition, when the hybrid automatic repeat request entity first sends data, it is sent in sequence number sequence, so the sequence number sequence of the data is consistent with the time sequence of the initial automatic data transmission request process.

 Step 102: When the radio link control layer entity discovers that there is missing data, monitoring a data transmission process of the first data, where the first data is data that is sent earlier than the second data sending time, and the second data is caused by missing data. The data.

 The data that causes the data to be missing is: data that makes the discovery data missing. For example: The sequence of sequence numbers sent by the sender of the data transmission process of the hybrid automatic repeat request is consistent with the time sequence sent by the data transmission process of the hybrid automatic repeat request. Therefore, when the radio link control layer entity A receives the data of the sequence numbers 8 and 9, the data with the missing sequence numbers 6 and 7 can be found. The data of the sequence numbers 8 and 9 is data causing data loss.

In the monitoring of the data transmission process, in order to improve the monitoring efficiency, the data transmission process of correctly transmitting data may not be monitored, and the data transmission process of the hybrid automatic retransmission request without activation is not monitored. When the radio link control layer entity discovers that the data is missing, some of the previous data transmission processes are in the monitored state because the last time the radio link control layer entity discovers that the data is missing. Therefore, in order to improve the monitoring efficiency, the process in the state being monitored can be No monitoring is performed.

 Therefore, the data transmission process of the first data may be a data transmission error in the active process, and there is no data transmission process in the monitoring state.

 The data transmission process is monitored to obtain data transmission information of the monitored process. Step 103: Stop monitoring the process when the data transmission process that is monitored receives the new data or new data indication, or the monitored process stops the data transmission, or the missing data is correctly received.

 Among them, when the monitored process is abnormal, the monitored process stops data transmission. For example, when the data exceeds the maximum number of retransmissions and the sender has no data to transmit; or during the data transmission, the sender misinterprets the NACK fed back by the receiver as an ACK, and the sender has no data to transmit; or When the hybrid automatic repeat request entity needs to be reset; or when the receive soft buffer overflows; or when the decoding check occurs abnormally. Monitor to obtain data transfer information for the process. The data transmission information includes: receiving new data or new data indication, or the monitored process stops data transmission, or the data is correctly received.

 Step 104: When all the data transmission processes that are monitored acquire the data transmission information and stop monitoring, the lost data is confirmed.

 After the radio link control layer entity acknowledges the lost data, a status report can be sent requesting the sender to resend the lost data.

In this embodiment, the sequence of the sequence number of the data transmission process using the hybrid automatic repeat request is consistent with the time sequence sent by the data transmission process of the hybrid automatic repeat request, and the wireless link control layer entity finds that When data is missing, the process that causes the data to be missing is the data transfer process that is earlier than the time the data that caused the data is missing. Therefore, according to the embodiment, when monitoring the hybrid automatic repeat request data transmission process, the data transmission process earlier than the transmission time of the data causing the data loss is monitored, and the data transmission information of the data transmission process is obtained, thereby reducing the data transmission information. use The workload of the household equipment. When it is acquired that the monitored data transmission process receives new data, or the monitored data transmission process receives a new data indication, or the monitored data transmission process stops data transmission, or the data transmission information that the data is correctly received, The monitoring of the data transfer process is stopped, and the data is missing, confirming that the missing data has been lost.

 FIG. 2 is a schematic diagram of detecting data loss by a radio link control layer according to Embodiment 1 of the present invention. As shown in FIG. 2, in the hybrid automatic retransmission request data transmission process, A indicates data sent to the radio link control layer entity A. In the hybrid automatic repeat request data transmission process, B indicates data transmitted to the radio link control layer entity B, an empty data transmission process indicates no data transmission, and X indicates a transmission error data transmission process.

 Taking the radio link control layer entity A as an example, when the radio link control layer entity A receives the data with the data sequence numbers 8 and 9, it finds the data with the missing data sequence numbers 6 and 7, and compares the numbers 8, 9 The data transmission process is monitored early in the data transmission process, as shown in the 1, 2, 3 and 4 processes. Among them, the data transmission process 1 is transmitted correctly, and may not be monitored. Because the data transmission process of the No. 2 data transmission process is empty, in order to improve the monitoring efficiency, the No. 2 process may not be monitored. At time 15, it was detected that process No. 3 received new data and therefore stopped monitoring process No. 3. At time 16, it was detected that the No. 4 process received new data, so the monitoring of the No. 4 process was stopped. When all the data transmission processes being monitored stop being monitored, it can be confirmed that the missing data sequence numbers 6 and 7 are lost.

 Embodiment 2

 The embodiment of the invention further provides an apparatus for detecting data loss of a radio link control layer. FIG. 3 is a structural diagram of a device according to Embodiment 2 of the present invention. As shown in Figure 3, the device includes:

 The data receiving unit 301 is configured to receive data sent by the medium access control layer and the data sending time.

The hybrid automatic repeat request entity has multiple parallel data transmission processes when transmitting data to the radio link control layer. For each data transmission process, the hybrid automatic repeat request receiving end can pass each received data. The parameters of the physical channel transmission get the connection frame number and the sub-data of the data. Frame number, these two parameters indicate when the sender sends the data.

 When the hybrid automatic repeat request entity first sends data, it is sent in serial number order. Therefore, the sequence number sequence of the data is consistent with the time when the data transmission process of the hybrid automatic repeat request sends data.

 The data transmission time may be recorded and sent to the data receiving unit by mixing the receiving end of the automatic retransmission entity, and the data receiving unit records the initial transmission time of the data. The data transmission time may also be recorded by other entities in the medium access control layer and sent to the data receiving unit.

 In this embodiment, the data transmission time is the initial transmission time of the data. The initial transmission time of the data can be directly recorded by the receiving end of the hybrid automatic repeat request entity; or the time when the data is correctly received at the time of abandoning the data transmission or after the retransmission is subtracted from the time taken for the retransmission to obtain the initial transmission time of the data.

 When the hybrid automatic repeat request entity receives new data, it needs to update the initial sending time of the data of the corresponding data transmission process.

 The data loss detecting unit 302 is configured to: when the data is found to be missing, detect the data transmission information of the first data, where the sending time of the first data is earlier than the sending time of the second data, and the second data is the data missing the missing data; And based on the data transmission information, the lost data is confirmed.

 The data loss detecting unit includes: a determining unit 3021, configured to determine whether the received data is missing, and send the determining result; the first monitoring unit 3022 is configured to: after receiving the information of the missing data sent by the determining unit 3021, Monitoring the data transmission process of the first data, and when the monitored data transmission process receives new data, the monitored data transmission process receives new data indication, the monitored data transmission process stops data transmission, or correctly receives missing data, Stop monitoring the data transfer process.

Among them, the monitored data transmission process stops the data transmission usually because the monitored data transmission process is abnormal. For example: the data exceeds the maximum number of retransmissions, and the sender has no data to send; in the process of transmitting data, the sender misinterprets the NACK fed back by the receiver as ACK, and the sender does not The data can be sent; the hybrid automatic repeat request entity needs to be reset; the receive soft buffer overflows; or the decoding check occurs abnormally. The sequence of the sequence number of the data transmission process of the automatic retransmission request sent by the sender is consistent with the time sequence of the data transmission process of the hybrid automatic repeat request. Therefore, when the radio link control layer entity A receives the data with the sequence numbers 8 and 9, the data with the missing sequence numbers 6 and 7 can be found, and the data with the sequence numbers 8 and 9 causes the data to be missing. The data. Wherein, when monitoring the data transmission process, the data transmission process of correctly transmitting data may not be monitored, and the data transmission process of the hybrid automatic retransmission request without activation is not monitored to improve the monitoring efficiency. In addition, when the radio link control layer entity discovers that the data is missing, some of the previous data transmission processes are still in the monitored state because the last radio link control layer entity finds that the data is missing. Therefore, in order to improve monitoring efficiency, the data transmission process that is still in the monitored state is not monitored. The data transmission process that is earlier than the data transmission time that caused the missing data may be a data transmission process in the active data transmission process and there is no data transmission process in the monitoring state.

 In this embodiment, the data transmission information of the process is obtained by monitoring the data transmission process, where the data transmission information includes: receiving new data, or receiving a new data indication, or stopping the data transmission by the monitored data transmission process, or Missing data is received correctly.

 The confirmation unit 3023 is configured to confirm the lost data when all monitored data transmission processes stop monitoring.

 Embodiment 3

 The embodiment of the invention further provides a method for detecting data loss of a radio link control layer. FIG. 4 is a flowchart of a method according to Embodiment 3 of the present invention. As shown in FIG. 4, the method includes:

 Step 401: The media access control layer entity records a data sending time, and sends the time and corresponding data to the radio link control layer entity.

The data transmission time is recorded by an entity in the medium access control layer, and may also be recorded by the hybrid automatic repeat request entity. Wherein, the recorded data transmission time can be automatically mixed by mixing The retransmission request entity sends to the radio link layer. The data transmission time is delivered by the hybrid automatic repeat request entity, and the hybrid automatic retransmission entity may, after the data is correctly received, deliver the recorded time together with the corresponding data to the upper entity of the media access control layer, and the upper layer The entity is submitted to the radio link control layer entity or directly to the radio link control layer entity.

 The hybrid automatic repeat request entity has multiple parallel data transmission processes when transmitting data to the radio link control layer. For each data transmission process, the hybrid automatic repeat request receiving end can pass each received data. The parameters of the physical channel transmission get the connection frame number and the subframe number of this data. These two parameters indicate the time when the sender sends the data. In addition, when hybrid automatic repeat request is used to send data for the first time, it is sent in serial number order. Therefore, the sequence number sequence of the data is consistent with the time at which the data transfer process of the hybrid automatic repeat request sends data. The data transmission time can be recorded by the receiving end of the hybrid automatic retransmission entity.

 Step 402: When the media access control layer entity finds that the data transmission process has data missing, the data loss indication of the data transmission process and the sending time of the lost data are sent to the radio link control layer entity.

 When the hybrid automatic repeat request entity finds that the transmitted data is lost, the data loss indication and the sending time may be sent to the entity of the radio link control layer by using the layer source language.

 The inter-layer source language is called ptimitives in the protocol. The source language has names and parameters. The parameters include four types, such as Req (request), Ind (indication), ResP (response), and Conf (confirm). The source language is called: MAC_LOST_DATA_Ind, the parameters are: Lost_ Indicator is used to indicate the data loss of the media access control layer, and Lostlnfo is used to indicate the time of data loss or the time when the data is first sent.

 Wherein, when the data transmission process of the hybrid automatic repeat request receives new data, receives a new data indication, or the data transmission process stops data transmission after receiving the data error, the hybrid automatic repeat request entity will find that the transmission is lost. data.

Step 403: When the radio link control layer entity finds that data is missing, querying a data loss indication of the first data, where the first data is data that is sent earlier than the second data sending time, and the second number is According to the data that causes the missing data to be missing. The transmission time corresponding to the lost data is queried for the data loss indication of the first data. In this embodiment, the data transmission information of the data transmission process includes a data loss indication.

 Step 404: When the queried data loss indication has been received, confirm the lost data. After the radio link control layer entity acknowledges the lost data, a status report can be sent requesting the sender to retransmit the lost data.

 In this embodiment, the sequence sequence of the data transmission process using the hybrid automatic repeat request is also consistent with the time sequence sent by the data transmission process of the hybrid automatic repeat request, when the radio link control layer entity When it is found that there is data missing, the missing data is sent earlier than the data that caused the missing data. Therefore, when the data loss indication is queried, the data loss indication earlier than the transmission time of the data causing the data loss is queried, thereby reducing the workload of the user equipment. When the queried data loss indication has been received, it can be confirmed that the missing data has been lost.

 FIG. 5 is a schematic diagram of a method for detecting data loss of a radio link control layer according to Embodiment 3 of the present invention. As shown in FIG. 5, in the data transmission process of the hybrid automatic retransmission request, A indicates that the method is sent to the radio link control layer entity A. Data; in the data transmission process of the hybrid automatic repeat request, B indicates data transmitted to the radio link control layer entity B; an empty data transmission process indicates no transmission; X indicates a transmission error data transmission process.

 At time 8, the hybrid automatic repeat request finds that there is data loss, and the process 3 data loss indication is sent to the radio link control layer entity A and entity B; at time 9, the hybrid automatic repeat request finds that there is data loss, and the process 4 The data loss indication is sent to the radio link control layer entity A and entity B.

Taking the radio link control layer entity A as an example, when the radio link control layer entity A receives the data with the sequence numbers 8 and 9 at time 15, it finds that the missing data sequence numbers are 6 and 7, and the pair The missing data before the initial transmission time 5 of the data missing data is queried. At time 3 and 4 in the figure, since the data has been correctly received at time 1, 2 is empty. Due to the query Data loss indications at times 3 and 4 have been received, so it can be confirmed that the data with sequence numbers 6 and 7 has been lost.

 Embodiment 4

 An embodiment of the present invention further provides an apparatus for detecting data loss of a radio link control layer. As shown in FIG. 6, the apparatus includes:

 The data receiving unit 601 is configured to receive data sent by the medium access control layer and a sending time of the data.

 The hybrid automatic repeat request entity has multiple parallel data transmission processes when transmitting data to the radio link control layer entity. For each data transmission process, the receiving end of the hybrid automatic repeat request entity receives one Data, the connection frame number and the subframe number of the data can be obtained through parameters transmitted by the physical channel, and the two parameters indicate the time when the sender sends the data. In addition, when the hybrid automatic repeat request entity first transmits data, it is sent in the sequence number sequence. Therefore, the sequence number sequence of the data and the time sequence in which the data transmission process of the hybrid automatic repeat request is sent are consistent.

 The data transmission time may be recorded by the receiving end of the hybrid automatic repeat request entity and sent to the data receiving unit, and the data receiving unit records the initial sending time of the data. The time when the hybrid automatic repeat request entity first transmits data can be obtained by the transmission time of the record. For example, when the data is initially transmitted, the receiving end records the data transmission time, or when the data is correctly received or when the data is discarded, the receiving end subtracts the time used for the retransmission according to the time, that is, the initial transmission time of the data. The data transmission time may also be recorded by other entities in the medium access control layer and sent to the data receiving unit.

 The initial transmission time of the data of the corresponding data transmission process needs to be updated when the hybrid automatic repeat request entity receives the new data.

 The data loss indication receiving unit 602 is configured to receive a data loss indication and a transmission time of the lost data.

Wherein, when the medium access control layer entity discovers a hybrid automatic repeat request entity data transmission process When the transmitted data is missing, the data loss indication can be sent to the entity of the radio link control layer through the inter-layer source language.

 The data loss detecting unit 603 is configured to: when the radio link control layer entity finds that data is missing, detecting data transmission information of the first data, where the sending time of the first data is earlier than the sending time of the second data, and the second data is caused by Data missing data; and the lost data is confirmed based on the data transmission information.

 The data loss detecting unit includes: a determining unit 6031, configured to determine whether the received data is missing, and send the determining result; the query unit 6032 is configured to: after receiving the information of the missing data sent by the determining unit 6031, query The data loss indication of the first data; the confirmation unit 6033 is configured to confirm the lost data when all the queried data receives the data loss indication.

 Embodiment 5

 The present invention also provides a method for detecting data loss of a radio link control layer, and the method is different from the method provided by the first embodiment in that: when the radio link control layer entity finds that data is missing, monitoring the hybrid automatic weight The range of requests for data transfer processes is different. As shown in Figure 7, the method includes:

 Step 701: The media access control layer records a data sending time, and sends the data sending time and corresponding data to the radio link control layer entity.

The data corresponding to the data transmission time is sent by the hybrid automatic repeat request entity to the radio link control layer. The data sending time is recorded by an entity in the media access control layer, and the entity may be a hybrid automatic repeat request entity. The hybrid automatic repeat request entity has multiple parallel data transmission processes when transmitting data to the radio link control layer entity. For each data transmission process, each time the receiving end of the hybrid automatic repeat request entity receives a data, The connection frame number and the subframe number of the data can be obtained through parameters transmitted by the physical channel, and the two parameters indicate the time when the sender sends the data. In addition, when the hybrid automatic repeat request entity first transmits data, it is sent in the sequence number sequence. Therefore, the sequence number sequence of the data is consistent with the time sequence in which the data transmission process of the hybrid automatic repeat request is initially transmitted. The data sending time may be recorded by the receiving end of the hybrid automatic repeat request entity. The time at which the hybrid automatic repeat request entity first transmits data can be obtained from the transmission time of the record. The time when the data is first transmitted may be obtained by the receiving end recording data transmission time when the data is initially transmitted; or when the data is correctly received or discarded, the receiving end subtracts the time used for the retransmission from the time to obtain the data for the initial transmission. time.

 Step 702: When the radio link control layer entity finds that there is missing data, monitoring the data transmission process that is earlier than the transmission time of the data causing the data loss and the data transmission process is activated, and the data transmission process is not in the monitoring state. The sequence of the sequence number of the data transmission process that sends the automatic retransmission request is the same as the sequence of the data transmission process sent by the hybrid automatic repeat request. When the radio link control layer entity A receives the data with the sequence numbers 8 and 9, it can find the data with the missing sequence numbers 6 and 7, and the data with the sequence numbers 8 and 9 is the data missing. data. Among them, when monitoring the data transmission process, the data transmission process of correctly transmitting data can be not monitored, and the data transmission process of the hybrid automatic retransmission request without activation is not monitored to improve the monitoring efficiency. When the radio link control layer entity discovers that the data is missing, some of the previous data transmission processes are in the monitored state due to the missing data of the last radio link control layer entity discovery. Therefore, in order to improve the monitoring efficiency, the monitoring data is being monitored. The status of the data transfer process is not monitored. The data transmission process is monitored to obtain data transmission information of the monitored data transmission process.

 Step 703: When the data transmission information of the monitored data transmission process is acquired, the process is stopped. The data transmission information is: information that the monitored data transmission process receives new data, the monitored data transmission process receives new data indication, the monitored data transmission process stops data transmission, or the missing data is correctly received.

Among them, the situation in which the monitored data transmission process is forced to stop is usually the same when the monitored data transmission process occurs. For example: when the data exceeds the maximum number of retransmissions, and there is no data to be sent at the transmitting end; during the transmission, the transmitting end misinterprets the NACK fed back by the receiving end as an ACK and sends When no data can be sent at the end; the hybrid automatic repeat request entity needs to be reset; when the receive soft buffer overflows or the decoding check occurs abnormally, the data transfer process will be forced to stop. Monitoring according to the transmission process to obtain data transmission information of the data transmission process. The data transmission information includes: receiving new data, receiving a new data indication, the monitored data transmission process stops data transmission, or the missing data is correctly received.

 Step 704: When all the data transmission processes that are monitored acquire the data transmission information and stop monitoring, the lost data is confirmed.

 After the radio link control layer entity acknowledges the lost data, a status report can be sent requesting the sender to retransmit the lost data.

 Embodiment 6

 An embodiment of the present invention further provides a device for detecting data loss of a radio link control layer, as shown in the figure.

As shown in Figure 8, the device includes:

 The determining unit 801 is configured to determine whether the received data is missing, and send the judgment result. The data loss detecting unit 802 is configured to detect data transmission information earlier than the transmission time of the data causing the data loss and confirm the lost data when the data is missing.

 The data loss detecting unit includes:

 The second monitoring unit 8021 is configured to: in the process of receiving the missing data sent by the determining unit 801, the data transmission process is incorrect and the data transmission process is not in the monitoring state, and is received in the monitored data transmission process. The monitoring of the data transmission process is stopped when new data, or new data indicates, or the monitored process stops transmitting data or correctly receives missing data.

Among them, the monitored data transmission process stops the data transmission usually because the monitored data transmission process is abnormal. For example: the data exceeds the maximum number of retransmissions, and the sender has no data to send; during the data transmission, the sender misinterprets the NACK fed back by the receiver as an ACK, and the sender has no data to send; the hybrid automatic repeat request entity Receive reset buffer overflow or solution when reset is required An error occurs in the code check.

 Among them, the data that causes the data to be missing is the data that makes the discovery data missing. For example: The sequence of sequence numbers sent by the data transmission process of the hybrid automatic repeat request is consistent with the time sequence sent by the data transmission process of the hybrid automatic repeat request. When the radio link control layer entity A receives the data with the sequence numbers 8 and 9, it can find the data with the missing sequence numbers 6 and 7, and the data with the sequence numbers 8 and 9 is the data missing. data. Among them, in the monitoring of the process, the data transmission process of correctly transmitting data can be not monitored, and the data transmission process of the hybrid automatic repeat request without activation is not monitored to improve the monitoring efficiency. When the radio link control layer entity discovers that the data is missing, some of the previous data transmission processes are still in the monitored state due to the missing data of the last radio link control layer entity discovery. Therefore, in order to improve the monitoring efficiency, the data still in the monitored state is improved. The transfer process is not monitored.

 In this embodiment, the data transmission information of the data transmission process is obtained by monitoring the data transmission process, where the data transmission information includes: receiving new data or new data indication, or monitoring the process to stop data transmission or the missing data is Receive correctly.

 A confirmation unit 8022 is configured to confirm the lost data when all monitored data transmission processes stop monitoring.

 In this embodiment, the order in which the data is transmitted by the data transmission process using the hybrid automatic repeat request is consistent with the time sequence in which the data is transmitted by the hybrid automatic repeat request process. When the radio link control layer entity finds that data is missing, The data transfer process that causes the data to be missing is a data transfer process that is earlier than the time that the serial number is missing. Therefore, in the present embodiment, the data transmission information earlier than the data transmission time missing the serial number is detected, and the lost data is confirmed based on the acquired data transmission information. Compared with all data transmission processes in the prior art that need to monitor the data transmission process except the hybrid automatic repeat request that causes the serial number missing, the workload of the user equipment is reduced, and the detection of the radio link control layer data loss is improved. s efficiency.

A person skilled in the art can understand that all or part of the steps of the method described in Embodiment 1, Embodiment 3 and Embodiment 5 can be implemented by a program to instruct related hardware. The program may be stored in a computer readable storage medium, and the steps included in the program are the same as those in the first embodiment and the third embodiment, respectively.

ROM/RAM, disk, CD, etc.

 The method for detecting data loss of the radio link control layer provided by the embodiment of the present invention is described above, and the description of the above embodiment is only used to help understand the method and core idea of the present invention. Meanwhile, the general technology in the field In the following, the description of the present invention is not limited to the scope of the present invention.

Claims

Rights request  A method for detecting data loss of a radio link control layer, the method comprising: detecting, when a radio link control layer entity finds missing data, data transmission information of the first data, sending the first data The time is earlier than the sending time of the second data, and the second data is data that causes the missing data to be missing;  The lost data is confirmed based on the detected data transmission information.  2. The method of detecting data loss of a radio link control layer according to claim 1, wherein:  Before the detecting the data transmission information of the first data, the method further includes: the entity of the media access control layer records the data transmission time, and sends the data transmission time and the corresponding data to the radio link control layer entity.  The method for detecting data loss of a radio link control layer according to claim 2, wherein the detecting data transmission information of the first data comprises: querying a data loss indication of the first data; The data loss indication is sent by the medium access control layer to the radio link control layer entity when the discovery data is missing;  The confirming the lost data according to the detected data transmission information includes: confirming the lost data when the queried data loss indication has been received.  The method for detecting data loss of a radio link control layer according to claim 3, wherein the medium access control layer sends a data loss indication and a transmission time of the lost data to the wireless through an inter-layer source language. Link control layer.  The method for detecting data loss of a radio link control layer according to claim 2, wherein the medium access control layer has at least two parallel data transmissions when transmitting the data to a radio link control layer. Process  The detecting data transmission information of the first data includes:  Monitoring the data transmission process of the first data in the data transmission process; When the obtained data transmission information is: The monitored data transmission process receives new data or receives When the new data indication is received, the monitored data transmission process stops the data transmission, or the missing data is correctly received, the monitoring is stopped for the process;  The confirming the lost data according to the data transmission information includes:  When all data transmission processes being monitored acquire data transmission information and stop monitoring, the lost data is confirmed.  The method for detecting data loss of a radio link control layer according to claim 5, wherein the data transmission process of the first data is further a data transmission error in an active process and no data transmission in a monitoring state. process.  The method for detecting data loss of a radio link control layer according to claim 2, wherein the data transmission time recorded by the medium access control layer is a data initial transmission time.  The method for detecting data loss of a radio link control layer according to any one of claims 1 to 7, wherein after the radio link control layer entity confirms the lost data, the transmission status report requests retransmission of the loss. data.  A device for detecting data loss of a radio link control layer, comprising: a data receiving unit, configured to receive data sent by a medium access control layer and a sending time of the data;  a data loss detecting unit, configured to detect data transmission information of the first data when the data is found to be missing, the sending time of the first data is earlier than the sending time of the second data, and the second data is caused by the missing Data missing from the data; and the lost data is confirmed based on the data transmission information.  The device for detecting data loss of the radio link control layer according to claim 9, wherein the data loss detecting unit comprises: a determining unit, configured to determine whether the received data is missing, and send the determination result; the first monitoring unit is configured to monitor the data transmission process of the first data after receiving the information of the missing data sent by the determining unit And when the monitored data transmission process receives new data, when the monitored data transmission process receives the new data indication, the monitored data transmission process stops The monitoring of the data transmission process is stopped according to the transmission or when the missing data is correctly received; the confirmation unit is configured to confirm the lost data when all the monitored data transmission processes stop monitoring.  The device for detecting data loss of the radio link control layer according to claim 9, wherein the data loss detecting unit comprises:  a determining unit, configured to determine whether the received data is missing, and send the determination result; the second monitoring unit is configured to monitor the data transmission process of the first data after receiving the information of the missing data sent by the determining unit The data transmission process of the first data further monitors a data transmission process in which the data transmission process is in an active data transmission process and is not in a monitoring state; when the monitored data transmission process receives new data, the monitored data When the transmission process receives the new data indication, the monitored data transmission process stops the data transmission, or correctly receives the missing data, the monitoring of the process is stopped;  A confirmation unit that is used to confirm lost data when all monitored processes stop monitoring. The apparatus for detecting data loss of a radio link control layer according to claim 9, further comprising: a data loss indication receiving unit, configured to receive a data loss indication and a sending time of the lost data;  The data loss detecting unit includes:  a determining unit, configured to determine whether the received data is missing, and send the determination result; the query unit is configured to query the data loss indication of the first data after receiving the information of the missing data sent by the determining unit;  The confirmation unit is configured to confirm the lost data when all the data being queried receives the data loss indication.