CN106375230B - Message transmission method and device - Google Patents
Message transmission method and device Download PDFInfo
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- CN106375230B CN106375230B CN201510424878.2A CN201510424878A CN106375230B CN 106375230 B CN106375230 B CN 106375230B CN 201510424878 A CN201510424878 A CN 201510424878A CN 106375230 B CN106375230 B CN 106375230B
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Abstract
The invention discloses a message transmission method and a message transmission device, relates to the technical field of communication, and aims to solve the problem that a communication entity in the prior art cannot discard invalid data packets in time, so that the utilization rate of wireless resources is reduced. The method comprises the following steps: determining the maximum available transmission time of a media access control service data unit (MAC PDU) of a message according to the processing condition of the message in a base station; and under the condition that the current time exceeds the maximum available transmission time, abandoning the transmission of the message.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a message.
Background
In a communication system, in order to ensure the timeliness of data, service data which does not meet the timeliness requirement is generally discarded. For example, in WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), and LTE-a, a Packet Data Convergence Protocol (PDCP) layer Discard Packet loss function is defined for delay sensitive services such as voice and video.
The 3gPP protocol 36.322 specifies that, when a discard indication of the PDCP layer in the LTE protocol reaches an RLC (radio link control) layer, if the PDCP PDU (protocol data unit) is not yet mapped to an RLC PDU, the RLC layer entity discards the PDCP PDU. However, if the PDCP PDU is already mapped to the RLC layer, no processing is performed. In this case, the communication system does not discard the invalid packet, thereby causing a waste of communication resources.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and an apparatus for transmitting a packet, so as to solve the problem that in the prior art, a communication entity cannot discard invalid data packets in time, thereby reducing the utilization rate of wireless resources.
In one aspect, the present invention provides a packet transmission method, including: determining the maximum available transmission time of a media access control protocol data unit (MAC PDU) of a message according to the processing condition of the message in a base station; and under the condition that the current time exceeds the maximum available transmission time, abandoning the transmission of the message.
Optionally, the determining, according to the processing condition of the packet in the base station, the maximum available transmission time of the MAC PDU of the packet includes: after receiving a message, determining the maximum available time of the message in a base station; when the message is transmitted among all layers of protocols, the residual available time of the message in the base station is transmitted layer by layer; and determining the remaining available time of the message in the MAC layer as the available transmission time of the MAC SDU, wherein the maximum value of the available transmission time of each MAC SDU is the maximum available transmission time of the MAC PDU.
Optionally, the determining, according to the processing condition of the packet in the base station, the maximum available transmission time of the MAC PDU of the packet includes: after receiving a message, determining the maximum available time of the message in a base station; the messages are transmitted among all layers of protocols by adding timestamps; determining the residual available time of the message in the base station according to the timestamp; and determining the remaining available time of the message in the MAC layer as the available transmission time of the MAC SDU, wherein the maximum value of the available transmission time of each MAC SDU is the maximum available transmission time of the MAC PDU.
Optionally, the transmitting between the respective layers of protocols includes: the PDCP layer transmits to the RLC layer and the MAC layer of the radio link control layer by layer.
Optionally, after receiving the message, determining the maximum available time of the message in the base station includes: and determining the maximum available time of the message in the base station according to the bearing type of the message.
In another aspect, the present invention further provides a packet transmission apparatus, including: a determining unit, configured to determine, according to a processing condition of a packet in a base station, a maximum available transmission time of an MAC PDU of the packet; and the abandoning unit is used for abandoning the transmission of the message under the condition that the current time exceeds the maximum available transmission time.
Optionally, the determining unit includes: the first determining module is used for determining the maximum available time of the message in the base station after receiving the message; the transmission module is used for transmitting the residual available time of the message in the base station layer by layer when the message is transmitted among all layers of protocols; and a second determining module, configured to determine that remaining available time of the packet in the MAC layer is available transmission time of MAC SDUs, where a maximum value of the available transmission time of each MAC SDU is a maximum available transmission time of a MAC PDU.
Optionally, the determining unit includes: a third determining module, configured to determine, after receiving a message, a maximum available time of the message in a base station; the timestamp adding module is used for adding timestamps to the messages and transmitting the messages among all layers of protocols; and 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 the remaining available time of the packet in an MAC layer is an available transmission time of an MAC SDU, where a maximum value of the available transmission times of the MAC SDUs is a maximum available transmission time of an MAC PDU.
Optionally, the transmitting between the respective layers of protocols includes: the PDCP layer transmits to the RLC layer and the MAC layer by layer.
Optionally, the first determining module or the third determining module is specifically configured to determine the maximum available time of the packet in the base station according to a bearer type of the packet.
The message transmission method and the device provided by the embodiment of the invention can determine the maximum available transmission time of the MAC PDU of the message according to the processing condition of the message in the base station; and under the condition that the current time exceeds the maximum available transmission time, abandoning the transmission of the message. Therefore, when the MAC transmits the message outwards, the overtime standard can be set for the message transmission according to the maximum available transmission time in each service data unit of the MAC layer, when the current time exceeds the maximum available transmission time, the available time of all MAC SDUs in the message is indicated to be overtime, and each protocol layer regards the messages as invalid data, so that the base station does not need to continuously transmit the message, and the invalid data is actively discarded, thereby effectively improving the utilization rate of wireless resources and effectively enhancing the timeliness of the data.
Drawings
Fig. 1 is a flowchart of a message transmission method according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating the transmission of messages between protocol layers according to an embodiment of the present invention;
fig. 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 present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1, an embodiment of the present invention provides a packet transmission method, including:
s11, determining the maximum available transmission time of the MAC PDU (protocol data unit) of the message according to the processing condition of the message in the base station;
and S12, when the current time exceeds the maximum available transmission time, abandoning the transmission of the message.
The message transmission method provided by the embodiment of the invention can determine the maximum available transmission time of the MAC PDU of the message according to the processing condition of the message in the base station; and under the condition that the current time exceeds the maximum available transmission time, abandoning the transmission of the message. Therefore, when the MAC transmits the message outwards, the overtime standard can be set for the message transmission according to the maximum available transmission time in each service data unit of the MAC layer, when the current time exceeds the maximum available transmission time, the available time of all MAC SDUs in the message is indicated to be overtime, and each protocol layer regards the messages as invalid data, so that the base station does not need to continuously transmit the message, and the invalid data is actively discarded, thereby effectively improving the utilization rate of wireless resources and effectively enhancing the timeliness of the data.
Specifically, the processing flow of the message in the base station may be as shown in fig. 2. As shown in fig. 2, the transmission of the message between the protocols of each layer includes layer-by-layer transmission from the PDCP layer to the RLC layer and the MAC layer.
Optionally, in step S11, the determining, according to the processing condition of the packet in the base station, the maximum available transmission time of the mac pdu of the packet may include:
after receiving a message, determining the maximum available time of the message in a base station; optionally, the maximum available time of the message in the base station may be determined according to the bearer type of the message;
when the message is transmitted among all layers of protocols, the residual available time of the message in the base station is transmitted layer by layer;
and determining the remaining available time of the message in the MAC layer as the available transmission time of the MAC SDU, wherein the maximum value of the available transmission time of each MAC SDU is the maximum available transmission time of the MAC PDU.
Optionally, when the PDCP layer of the base station processes the bearer Packet to construct the PDU, the maximum available time of the Packet in the base station may be calculated according to the requirement of the bearer Packet delaybridge (3GPP 36.401Table 6.1.7: standard QCI characteristics), the remaining available time of the PDU is carried when the PDCP PDU is delivered to the RLC layer, the remaining available time is transferred to the MAC layer entity by the RLC layer, the MAC layer entity calculates the maximum transmission time of all SDUs in the MAC PDU, and if the maximum transmission time in the transmission process is out and uplink HARQ ACK is still not received, that is, retransmission is still unsuccessful, the HARQ process is actively interrupted to release HARQ resources.
Optionally, in step S11, the determining, according to the processing condition of the packet in the base station, the maximum available transmission time of the mac pdu of the packet may also include:
after receiving a message, determining the maximum available time of the message in a base station; optionally, the maximum available time of the message in the base station may be determined according to the bearer type of the message;
the messages are transmitted among all layers of protocols by adding timestamps;
determining the residual available time of the message in the base station according to the timestamp;
and determining the remaining available time of the message in the MAC layer as the available transmission time of the MAC SDU, wherein the maximum value of the available transmission time of each MAC SDU is the maximum available transmission time of the MAC PDU.
Wherein, the transmission of the message between each layer of protocols comprises the transmission from the PDCP layer to the RLC layer and the MAC layer by layer. Specifically, when the terminal accesses the base station and establishes each bearer, each entity of the protocol layer, such as PDCP, RLC (Radio Link Control), MAC (Media Access Control), etc., calculates the maximum available time of the SDU in the base station according to the requirement of the bearer Packet delaybridge. The PDCP layer carries the time stamp of the service message reaching the base station when delivering the PDU to the RLC layer, and the service message is transferred to the MAC layer entity by the RLC layer, and the MAC layer entity calculates the maximum available time of all SDUs in the MAC PDU. The MAC layer checks whether the maximum available time is overtime when starting HARQ transmission every time, if the maximum available time is overtime, the HARQ processing process is interrupted to release HARQ resources to enter the next HARQ processing process, and if the maximum available time is not overtime, HARQ retransmission is continued until the maximum HARQ retransmission times. For example, in an embodiment of the present invention, each layer entity calculates the maximum available time of a message in a base station to be 100ms, the timestamp of the message when the message reaches the base station to be 1, the PDCP layer of the base station carries the timestamp (or time number) 1 of the service message when the PDU is delivered to the RLC layer, the timestamp is delivered layer by layer with the message, if the time number of the MAC layer to be 9, the remaining available time of the message in the MAC layer is 100ms- (9-1) × 10ms to 20ms, of course, the minimum unit of the timestamp in this example is 10ms, and smaller accuracy may also be used. Since the remaining available time of the packet is mainly used for data transmission at the MAC layer, the remaining available time of the packet at the MAC layer is also referred to as the available transmission time of the packet, where the maximum value of the remaining available time is the maximum available transmission time.
The following describes the message transmission method provided by the present invention in detail through specific embodiments. As shown in fig. 3, in this embodiment, the message transmission method may include the following steps:
101, receiving a data packet by a PDCP entity, recording the reaching time of the data packet, calculating the overtime according to a Discard Timer if a bottom RLC entity is in an UM mode, and setting the overtime to be an infinite value if the bottom RLC entity is in an AM mode, namely the PDU never times out and has no overtime parameter;
the PDCP entity delivers PDUs to the RLC entity while delivering remaining available time;
103, the RLC entity delivers the RLC PDU of the layer to the MAC entity, and the overtime time is set as the maximum value in the RLC SDU;
when constructing a MAC PDU, a MAC entity determines whether the MAC PDU meets a timeout parameter setting condition, where the timeout parameter setting condition includes: the MAC PDU is in a transparent format, or the MAC PDU includes a MAC SDU without a timeout parameter, or includes a MAC control element (MAC control element), or the LCID (logical channel ID) field of the MAC subheader is not within the range of "00001-; otherwise, executing step 105;
105. setting the MAC PDU timeout time as the maximum value of the remaining available time of all MAC SDUs, and allocating an HARQ process to the MAC PDU by the MAC layer;
106. whether an ACK is received or a timeout is reached or a maximum number of retransmissions N is reached for an ith (i ═ 0,1,2.. max number of retransmissions N) HARQ transmission; if yes, go to step 107, if no, go to step 108;
107. interrupting transmission and releasing an MAC PDU buffer area and an HARQ process;
108. continuing the (i + 1) th HARQ transmission;
109. and ending the process and entering normal HARQ process processing.
Correspondingly, as shown in fig. 4, an embodiment of the present invention further provides a message transmission apparatus, including:
a determining unit 31, configured to determine, according to a processing condition of a packet in a base station, a maximum available transmission time of an MAC PDU of the packet;
a discarding unit 32, configured to discard transmission of the packet if the current time exceeds the maximum available transmission time.
In the message transmission apparatus provided in the embodiment of the present invention, the determining unit 31 can determine the maximum available transmission time of the MAC PDU of the message according to the processing condition of the message in the base station; the discarding unit 32 is capable of discarding the transmission of the message if the current time exceeds the maximum available transmission time. Therefore, when the MAC transmits the message outwards, the overtime standard can be set for the message transmission according to the maximum available transmission time in each service data unit of the MAC layer, when the current time exceeds the maximum available transmission time, the available time of all MAC SDUs in the message is indicated to be overtime, and each protocol layer regards the messages as invalid data, so that the base station does not need to continuously transmit the message, and the invalid data is actively discarded, thereby effectively improving the utilization rate of wireless resources and effectively enhancing the timeliness of the data.
Alternatively, the determining unit 31 may include:
the first determining module is used for determining the maximum available time of the message in the base station after receiving the message;
the transmission module is used for transmitting the residual available time of the message in the base station layer by layer when the message is transmitted among all layers of protocols;
and a second determining module, configured to determine that remaining available time of the packet in the MAC layer is available transmission time of MAC SDUs, where a maximum value of the available transmission time of each MAC SDU is a maximum available transmission time of a MAC PDU.
Alternatively, the determining unit 31 may include:
a third determining module, configured to determine, after receiving a message, a maximum available time of the message in a base station;
the timestamp adding module is used for adding timestamps to the messages and transmitting the messages among all layers of protocols;
and 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 the remaining available time of the packet in an MAC layer is an available transmission time of an MAC SDU, where a maximum value of the available transmission times of the MAC SDUs is a maximum available transmission time of an MAC PDU.
Optionally, the transmitting between the respective layers of protocols includes: the PDCP layer transmits to the RLC layer and the MAC layer by layer.
Optionally, the first determining module or the third determining module is specifically configured to determine the maximum available time of the packet in the base station according to a bearer type of the packet.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.
Claims (8)
1. A method for packet transmission, comprising:
determining the maximum available transmission time of a media access control protocol data unit (MAC PDU) of a message according to the processing condition of the message in a base station;
under the condition that the current time exceeds the maximum available transmission time, the transmission of the message is abandoned;
the determining the maximum available transmission time of the MAC PDU of the packet according to the processing condition of the packet in the base station includes:
after receiving a message, determining the maximum available time of the message in a base station;
when the message is transmitted among all layers of protocols, the residual available time of the message in the base station is transmitted layer by layer;
and determining the remaining available time of the message in the MAC layer as the available transmission time of the MAC SDU, wherein the maximum value of the available transmission time of each MAC SDU is the maximum available transmission time of the MAC PDU.
2. The method of claim 1, wherein the determining the maximum available transmission time of the MAC PDU of the packet according to the processing condition of the packet in the base station comprises:
after receiving a message, determining the maximum available time of the message in a base station;
the messages are transmitted among all layers of protocols by adding timestamps;
determining the residual available time of the message in the base station according to the timestamp;
and determining the remaining available time of the message in the MAC layer as the available transmission time of the MAC SDU, wherein the maximum value of the available transmission time of each MAC SDU is the maximum available transmission time of the MAC PDU.
3. The method of claim 2, wherein the transmitting between each layer of protocols comprises:
the PDCP layer transmits to the RLC layer and the MAC layer of the radio link control layer by layer.
4. The method of claim 2, wherein determining the maximum available time of the message in the base station after receiving the message comprises:
and determining the maximum available time of the message in the base station according to the bearing type of the message.
5. A message transmission apparatus, comprising:
a determining unit, configured to determine, according to a processing condition of a packet in a base station, a maximum available transmission time of an MAC PDU of the packet;
a discarding unit, configured to discard transmission of the packet when the current time exceeds the maximum available transmission time;
the determination unit includes:
the first determining module is used for determining the maximum available time of the message in the base station after receiving the message;
the transmission module is used for transmitting the residual available time of the message in the base station layer by layer when the message is transmitted among all layers of protocols;
and a second determining module, configured to determine that remaining available time of the packet in the MAC layer is available transmission time of MAC SDUs, where a maximum value of the available transmission time of each MAC SDU is a maximum available transmission time of a MAC PDU.
6. The apparatus of claim 5, wherein the determining unit comprises:
a third determining module, configured to determine, after receiving a message, a maximum available time of the message in a base station;
the timestamp adding module is used for adding timestamps to the messages and transmitting the messages among all layers of protocols;
and 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 the remaining available time of the packet in an MAC layer is an available transmission time of an MAC SDU, where a maximum value of the available transmission times of the MAC SDUs is a maximum available transmission time of an MAC PDU.
7. The apparatus of claim 6, wherein the transmitting between each layer of protocols comprises:
the PDCP layer transmits to the RLC layer and the MAC layer by layer.
8. The apparatus according to claim 6, wherein the first determining module or the third determining module is specifically configured to determine the maximum available time of the packet in the base station according to a bearer type of the packet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510424878.2A CN106375230B (en) | 2015-07-20 | 2015-07-20 | Message transmission method and device |
| PCT/CN2016/070078 WO2017012290A1 (en) | 2015-07-20 | 2016-01-04 | Packet transmission method, apparatus and device, and computer storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510424878.2A CN106375230B (en) | 2015-07-20 | 2015-07-20 | Message transmission method and device |
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| CN106375230A CN106375230A (en) | 2017-02-01 |
| CN106375230B true CN106375230B (en) | 2020-05-12 |
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| GB2566968B (en) * | 2017-09-28 | 2020-04-22 | Tcl Communication Ltd | Pre-processing in wireless uplink transmissions |
| WO2019095293A1 (en) * | 2017-11-17 | 2019-05-23 | Oppo广东移动通信有限公司 | Method and device for processing data |
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| CN101394293A (en) * | 2007-09-19 | 2009-03-25 | 中兴通讯股份有限公司 | System for implementing broadcast data full network synchronization |
| CN102014432A (en) * | 2010-11-18 | 2011-04-13 | 中兴通讯股份有限公司 | Downlink resource allocation method and base station |
| CN103888219A (en) * | 2014-03-11 | 2014-06-25 | 华为技术有限公司 | Method and device for receiving unacknowledged wireless link control layer data |
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| CN1878134A (en) * | 2006-07-10 | 2006-12-13 | 武汉理工大学 | Time-delay constrained multipath routing method for Ad hoc network |
| CN101932004B (en) * | 2009-06-25 | 2012-07-04 | 电信科学技术研究院 | Data sending and processing method and equipment for data link layer |
| US20110038313A1 (en) * | 2009-08-12 | 2011-02-17 | Electronics And Telecommunications Research Institute | Enhanced communication apparatus for providing enhanced concatenation, segmentation and reassembly of service data units |
| WO2015012557A1 (en) * | 2013-07-23 | 2015-01-29 | Lg Electronics Inc. | Method and apparatus for enforcing prioritized bit rate in wireless communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394293A (en) * | 2007-09-19 | 2009-03-25 | 中兴通讯股份有限公司 | System for implementing broadcast data full network synchronization |
| CN102014432A (en) * | 2010-11-18 | 2011-04-13 | 中兴通讯股份有限公司 | Downlink resource allocation method and base station |
| CN103888219A (en) * | 2014-03-11 | 2014-06-25 | 华为技术有限公司 | Method and device for receiving unacknowledged wireless link control layer data |
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| CN106375230A (en) | 2017-02-01 |
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