WO2017012290A1 - Packet transmission method, apparatus and device, and computer storage medium - Google Patents

Abstract

Embodiments of the present invention relate to the technical field of communications. Disclosed are a packet transmission method, apparatus and device, and a computer storage medium, for use in resolving the problem of reduced utilization rate of wireless resources due to failure of discarding ineffective data packets by a communication entity in time in the related art. The method comprises: determining a maximum available transmission time of a medium access control service data unit (MAC PDU) of a packet according to processing condition of the packet in a base station; and discarding the transmission of the packet in a case in which a current time exceeds the maximum available transmission time.

Description

Message transmission method, device, device and computer storage medium Technical field

The present invention relates to the field of communications technologies, and in particular, to a message transmission method, apparatus, device, and computer storage medium.

Background technique

In the communication system, in order to ensure the timeliness of the data, the service data that does not meet the timeliness requirement is usually discarded. For example, the wireless communication system WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), and LTE-A define PDCP (Packet Data) for delay-sensitive services such as voice and video. The Discard packet loss function of the Convergence Protocol (Packet Data Convergence Protocol) layer.

The 3gPP protocol 36.322 specifies that when the discarding indication of the PDCP layer in the LTE protocol arrives at the RLC (radio link control) layer, if the PDCP PDU (protocol data unit) has not been mapped to the RLC PDU. The RLC layer entity discards the PDCP PDU. However, if the PDCP PDU has been mapped to the RLC layer, no processing takes place. In this case, the communication system does not discard invalid data packets, thereby causing waste of communication resources.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a message transmission method, device, device, and computer storage medium, which are used to solve the problem that the communication entity cannot discard invalid data packets in time in the related art, thereby reducing the utilization of wireless resources. .

In one aspect, the embodiment of the present invention provides a packet transmission method, including: determining, according to a processing situation of a packet in a base station, a maximum available transmission time of a medium access control protocol data unit MAC PDU of the packet; In case the maximum available transmission time is exceeded, the transmission of the message is abandoned.

Optionally, the determining, according to the processing situation of the packet in the base station, determining a maximum available transmission time of the MAC PDU of the packet includes: determining, after receiving the packet, a maximum available time of the packet in the base station; Transmitting the remaining available time of the packet in the base station layer by layer when the packet is transmitted between the layers; determining the The remaining available time of the message in the MAC layer is the available transmission time of the MAC SDU, wherein the maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU.

Optionally, the determining, according to the processing situation of the packet in the base station, determining a maximum available transmission time of the MAC PDU of the packet includes: determining, after receiving the packet, a maximum available time of the packet in the base station; Transmitting the packet with a time stamp between the layers of the protocol; determining, according to the timestamp, a remaining available time of the packet in the base station; determining that the remaining available time of the packet in the MAC layer is The available transmission time of the MAC SDU, where the maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU.

Optionally, the transmitting between the layers of the protocol includes: layer-by-layer transmission by the packet data convergence protocol PDCP layer to the radio link control RLC layer and the MAC layer.

Optionally, after the receiving the packet, determining the maximum available time of the packet in the base station includes: determining, according to the bearer type of the packet, a maximum available time of the packet in the base station.

On the other hand, the embodiment of the present invention further provides a message transmission apparatus, including: a determining unit, configured to determine a maximum available transmission time of a MAC PDU of the packet according to a processing condition of the packet in the base station; And set to abandon the transmission of the message if the current time exceeds the maximum available transmission time.

Optionally, the determining unit includes: a first determining module, configured to determine, after receiving the packet, a maximum available time of the packet in the base station; and a transmitting module, configured to set the packet in each layer protocol During the inter-transmission, the remaining available time of the message in the base station is transmitted layer by layer; the second determining module is configured to determine that the remaining available time of the message in the MAC layer is the available transmission time of the MAC SDU, where The maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU.

Optionally, the determining unit includes: a third determining module, configured to determine, after receiving the packet, a maximum available time of the packet in the base station; and a time stamp capping module, configured to add the packet The cover time stamp is transmitted between the layers of the protocol; the fourth determining module is configured to determine, according to the timestamp, the remaining available time of the message in the base station, and determine that the remaining information of the message in the MAC layer is available The time is the available transmission time of the MAC SDU, wherein the maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU.

Optionally, the transmitting between the layers of the protocol includes: transmitting the layer by layer from the PDCP layer to the RLC layer and the MAC layer.

Optionally, the first determining module or the third determining module is configured to determine a maximum available time of the packet in the base station according to a bearer type of the packet.

In another aspect, the embodiment of the present invention further provides a data synchronization device, including the message transmission device according to any one of the above.

In still another aspect, an embodiment of the present invention provides a computer storage medium, where the computer storage medium stores an execution instruction, where the execution instruction is used to execute the message transmission method according to any one of the above items.

The packet transmission method, device, device, and computer storage medium provided by the embodiments of the present invention can determine the maximum available transmission time of the MAC PDU of the packet according to the processing situation of the packet in the base station; In the case of transmission time, the transmission of the message is abandoned. In this way, when the MAC transmits the packet, the timeout standard can be set for the packet transmission according to the maximum available transmission time in each service data unit of the MAC layer. When the current time has exceeded the maximum available transmission time, the packet indicates The available time of all the MAC SDUs has expired. The protocol layer has regarded these packets as invalid data. Therefore, the base station does not need to continue to send the packets and actively discards invalid data, thereby effectively improving the utilization of radio resources and effectively Enhanced data timeliness.

DRAWINGS

FIG. 1 is a flowchart of a message transmission method according to an embodiment of the present invention;

2 is a schematic diagram of transmission of packets between protocol layers in an embodiment of the present invention;

3 is a detailed flowchart of a message transmission method according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a message transmission apparatus according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in FIG. 1 , an embodiment of the present invention provides a packet transmission method, including:

S11: Determine, according to the processing situation of the packet in the base station, a maximum available transmission time of a MAC PDU (protocol data unit) of the packet;

S12: Abandon the transmission of the message if the current time exceeds the maximum available transmission time.

The packet transmission method provided by the embodiment of the present invention can determine the maximum available transmission time of the MAC PDU of the packet according to the processing situation of the packet in the base station; if the current time exceeds the maximum available transmission time, the packet is discarded. Transmission. In this way, when the MAC transmits the packet, the timeout standard can be set for the packet transmission according to the maximum available transmission time in each service data unit of the MAC layer. When the current time has exceeded the maximum available transmission time, the packet indicates The available time of all the MAC SDUs has expired. The protocol layer has regarded these packets as invalid data. Therefore, the base station does not need to continue to send the packets and actively discards invalid data, thereby effectively improving the utilization of radio resources and effectively Enhanced data timeliness.

Optionally, the processing flow of the packet in the base station can be as shown in FIG. 2 . As shown in FIG. 2, the transmission of the message between the layers of the protocol includes layer by layer transmission from the PDCP layer to the RLC layer and the MAC layer.

Optionally, in step S11, determining the maximum available transmission time of the MAC PDU of the packet according to the processing situation of the packet in the base station may include:

After receiving the packet, determining the maximum available time of the packet in the base station; optionally, determining the maximum available time of the packet in the base station according to the bearer type of the packet;

When the message is transmitted between layers of protocols, the remaining available time of the message in the base station is transmitted layer by layer;

Determining the remaining available time of the message in the MAC layer is the available transmission time of the MAC SDU, wherein the maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU.

Optionally, the PDCP layer of the base station can calculate the maximum available time of the packet in the base station according to the Packet Delay Budget (3GPP 23.203: Standardized QCI characteristics) of the bearer when processing the bearer packet construction PDU. When the RLC layer delivers the PDCP PDU, the remaining available time of the PDU is carried, and the remaining available time is transmitted by the RLC layer to the MAC layer entity, and the MAC layer entity calculates the maximum transmission time of all the SDUs in the MAC PDU, if the maximum transmission time expires during the transmission. If the uplink HARQ ACK is still not received, that is, the retransmission is still unsuccessful, the HARQ process is actively interrupted to release the HARQ resource.

Optionally, in step S11, determining the maximum available transmission time of the MAC PDU of the packet according to the processing situation of the packet in the base station may also include:

After receiving the packet, determining the maximum available time of the packet in the base station; optionally, determining the maximum available time of the packet in the base station according to the bearer type of the packet;

Time stamping of messages is transmitted between layers of protocols;

Determining the remaining available time of the message in the base station according to the timestamp;

Determining the remaining available time of the message in the MAC layer is the available transmission time of the MAC SDU, wherein the maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU.

The transmission of the message between the layers of the protocol includes layer by layer transmission from the PDCP layer to the RLC layer and the MAC layer. Specifically, when the terminal accesses the base station and establishes each bearer, the entities of the protocol layer, such as PDCP, RLC (Radio Link Control, Radio Link Control), and MAC (Media Access Control), are respectively carried according to the bearer. Packet Delay Budget requires calculation of the maximum available time of the SDU in the base station. The PDCP layer carries the timestamp of the service message to the base station when delivering the PDU to the RLC layer, and is transmitted by the RLC layer to the MAC layer entity, and the MAC layer entity calculates the maximum available time of all the SDUs in the MAC PDU. The MAC layer checks whether the maximum available time expires each time the HARQ transmission is started. If the timeout is interrupted, the HARQ process releases the HARQ resource to enter the next HARQ process, and if not, the HARQ retransmission is continued until the maximum number of HARQ retransmissions. For example, in an embodiment of the present invention, each layer entity calculates that the maximum available time of the packet in the base station is 100 ms, and the timestamp when the packet arrives at the base station is 1, and the PDCP layer of the base station delivers the PDU to the RLC layer. Timestamp (or time sequence number) of the arriving base station carrying the service packet. The timestamp is transmitted layer by layer. If the time sequence of the MAC layer is 9, the remaining available time of the packet in the MAC layer. It is 100ms-(9-1)*10ms=20ms. Of course, the minimum unit of timestamp in this example is 10ms, and smaller precision can also be used. Since the remaining available time of the message is mainly used for data transmission at the MAC layer, the remaining available time of the message in the MAC layer is also referred to as the available transmission time of the message, wherein the maximum available time is the largest. The value is the maximum available transmission time.

The message transmission method provided by the preferred embodiment of the present invention is described in detail below. As shown in FIG. 3, in the preferred embodiment, the message transmission method may include the following steps:

The PDCP entity receives the data packet and records the time of arrival. If the underlying RLC entity is in the UM mode, the timeout period is calculated according to the Discard Timer. If the underlying RLC entity is in the AM mode, the timeout period is set to infinity, that is, the timeout period. The PDU never times out, no timeout parameter;

102. The PDCP entity delivers the PDU to the RLC entity while delivering the remaining available time;

103. The RLC entity delivers the local RLC PDU to the MAC entity, and sets the timeout period to the maximum value in the RLC SDU;

104. When constructing the MAC PDU, the MAC entity determines whether the MAC PDU meets the timeout parameter setting condition, and the timeout parameter setting condition includes: the MAC PDU is in a transparent format, or the MAC PDU includes no timeout parameter. MAC SDU, or contains a MAC control element, or the LCID (Logical Channel ID) field of the MAC subheader is not in the range of "00001-01010" in Table 6.2.1-1 of 3GPP TS 36.321, if yes, then Go to step 109; otherwise, go to step 105;

105. Set a MAC PDU timeout time to a maximum of all MAC SDU remaining available times, and the MAC layer allocates a HARQ process to process the MAC PDU;

106. The ith (i=0, 1, 2... maximum number of retransmissions N) whether the HARQ transmission receives the ACK or times out or reaches the maximum number of retransmissions N; if yes, step 107 is performed, and if no, step 108 is performed. ;

107. Interrupt transmission, release the MAC PDU buffer and the HARQ process;

108. Continue the i+1th HARQ transmission;

109. The process ends and enters the normal HARQ process.

Correspondingly, as shown in FIG. 4, an embodiment of the present invention further provides a message transmission apparatus, including:

The determining unit 31 is configured to determine, according to the processing situation of the packet in the base station, the maximum available transmission time of the MAC PDU of the packet;

The abandonment unit 32 is set to abandon the transmission of the message if the current time exceeds the maximum available transmission time.

In the message transmission apparatus provided by the embodiment of the present invention, the determining unit 31 can determine the maximum available transmission time of the MAC PDU of the packet according to the processing situation of the packet in the base station; the abandonment unit 32 can exceed the maximum available transmission time at the current time. In case, the transmission of the message is abandoned. In this way, when the MAC transmits the packet, the timeout standard can be set for the packet transmission according to the maximum available transmission time in each service data unit of the MAC layer. When the current time has exceeded the maximum available transmission time, the packet indicates The available time of all the MAC SDUs has expired. The protocol layer has regarded these packets as invalid data. Therefore, the base station does not need to continue to send the packets and actively discards invalid data, thereby effectively improving the utilization of radio resources and effectively Enhanced data timeliness.

Optionally, the determining unit 31 may include:

The first determining module is configured to determine, after receiving the packet, a maximum available time of the packet in the base station;

The delivery module is configured to transmit the remaining available time of the message in the base station layer by layer when the message is transmitted between the layers of the protocol;

The second determining module is configured to determine that the remaining available time of the message in the MAC layer is the available transmission time of the MAC SDU, where the maximum value of the available transmission time of each MAC SDU is the maximum of the MAC PDU. Use transmission time.

Optionally, the determining unit 31 may include:

a third determining module, configured to determine a maximum available time of the packet in the base station after receiving the packet;

a time stamp capping module, configured to time stamp the message between layers of protocols;

The fourth determining module is configured to determine, according to the timestamp, the remaining available time of the packet in the base station, and determine that the remaining available time of the packet in the MAC layer is the available transmission time of the MAC SDU, where the available transmission time of each MAC SDU The maximum value in is the maximum available transmission time of the MAC PDU.

Optionally, the transmitting between the layers of the protocol includes: transmitting the layer by layer from the PDCP layer to the RLC layer and the MAC layer.

Optionally, the first determining module or the third determining module is configured to determine, according to the bearer type of the packet, a maximum available time of the packet in the base station.

In the embodiment of the present invention, a message transmission device is further provided, including the message transmission device in the above implementation.

In the embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction, where the execution instruction is used to execute the message transmission method in the foregoing embodiment.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Industrial applicability

As described above, according to the foregoing embodiment and the preferred embodiment, when the MAC transmits the packet outward, the timeout standard can be set for the packet transmission according to the maximum available transmission time in each service data unit of the MAC layer, and the current time has exceeded. The maximum available transmission time indicates that the available time of all MAC SDUs in the packet has expired. The protocol layer has regarded these packets as invalid data. Therefore, the base station does not need to continue to send the packet and actively discards the invalid data. , thereby effectively improving the utilization of wireless resources and effectively enhancing the timeliness of data.

Claims (12)

A message transmission method includes: Determining, according to a processing situation of the packet in the base station, a maximum available transmission time of the medium access control protocol data unit MAC PDU of the packet; In case the current time exceeds the maximum available transmission time, the transmission of the message is abandoned. The method according to claim 1, wherein the determining the maximum available transmission time of the MAC PDU of the packet according to the processing situation of the packet in the base station comprises: After receiving the packet, determining a maximum available time of the packet in the base station; Transmitting the remaining available time of the packet in the base station layer by layer when the packet is transmitted between the layers; Determining that the remaining available time of the message in the MAC layer is the available transmission time of the MAC SDU, wherein the maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU. The method according to claim 1, wherein the determining the maximum available transmission time of the MAC PDU of the packet according to the processing situation of the packet in the base station comprises: After receiving the packet, determining a maximum available time of the packet in the base station; The message is time stamped and transmitted between layers of protocols; Determining, according to the timestamp, a remaining available time of the message in the base station; Determining that the remaining available time of the message in the MAC layer is the available transmission time of the MAC SDU, wherein the maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU. The method of claim 2 or 3, wherein said transmitting between layers of protocols comprises: The RCP layer and the MAC layer are transported layer by layer by the packet data convergence protocol PDCP layer to the radio link. The method according to claim 2 or 3, wherein after the receiving the message, determining that the maximum available time of the message in the base station comprises: The maximum available time of the packet in the base station is determined according to the bearer type of the packet. A message transmission device comprising: Determining a unit, configured to determine a MAC PDU of the packet according to a processing condition of the packet in the base station Maximum available transmission time; The abandonment unit is set to abandon the transmission of the message if the current time exceeds the maximum available transmission time. The apparatus of claim 6, wherein the determining unit comprises: a first determining module, configured to determine, after receiving the packet, a maximum available time of the packet in the base station; a delivery module, configured to transmit the remaining available time of the packet in the base station layer by layer when the packet is transmitted between layers of protocols; And a second determining module, configured to determine that the remaining available time of the packet in the MAC layer is an available transmission time of the MAC SDU, where a maximum value of the available transmission times of each MAC SDU is a maximum available transmission time of the MAC PDU. The apparatus of claim 6, wherein the determining unit comprises: a third determining module, configured to determine, after receiving the packet, a maximum available time of the packet in the base station; a time stamp capping module, configured to time stamp the message to be transmitted between layers of protocols; a fourth determining module, configured to determine, according to the timestamp, a remaining available time of the packet in the base station, and determine that a remaining available time of the packet in the MAC layer is an available transmission time of the MAC SDU, where The maximum of the available transmission times of each MAC SDU is the maximum available transmission time of the MAC PDU. The apparatus of claim 7 or 8, wherein said transmitting between layers of protocols comprises: The PDCP layer transmits layer by layer to the RLC layer and the MAC layer. The apparatus according to claim 7 or 8, wherein the first determining module or the third determining module is configured to determine a maximum available time of the message in the base station according to a bearer type of the message. A message transmission device comprising the device of any one of claims 6 to 10. A computer storage medium storing execution instructions for performing the method of any one of claims 1 to 5.

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