CN108934044A - Data pack transmission method and equipment - Google Patents

Data pack transmission method and equipment Download PDF

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Publication number
CN108934044A
CN108934044A CN201710391375.9A CN201710391375A CN108934044A CN 108934044 A CN108934044 A CN 108934044A CN 201710391375 A CN201710391375 A CN 201710391375A CN 108934044 A CN108934044 A CN 108934044A
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China
Prior art keywords
equipment
data packet
caching
pdcp
unit
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CN201710391375.9A
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CN108934044B (en
Inventor
马志斌
赵其勇
季莉
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201710391375.9A priority Critical patent/CN108934044B/en
Priority to PCT/CN2018/076450 priority patent/WO2018218996A1/en
Publication of CN108934044A publication Critical patent/CN108934044A/en
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Publication of CN108934044B publication Critical patent/CN108934044B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the present invention discloses a kind of data pack transmission method and the first equipment, wherein the first equipment includes transmission control unit, Packet Data Convergence Protocol PDCP unit, wherein, PDCP unit is used to send caching instruction information to transmission control unit, and caching instruction information is used to indicate the data packet number of current cache in the corresponding spatial cache of PDCP unit；Transmission control unit is used to receive caching instruction information from PDCP unit；Transmission control unit is used to indicate information according to caching, it is determined whether the data packet of the second equipment is sent to PDCP unit.Using the application, wireless transmission environments can be preferably adapted to, improve the utilization rate to wireless transmission bandwidth.

Description

Data pack transmission method and equipment
Technical field
This application involves field of communication technology more particularly to a kind of data pack transmission method and equipment.
Background technique
Transmission control protocol (Transmission Control Protocol, TCP) is a kind of connection-oriented, reliable , transport layer communication protocol based on byte stream, be widely applied in current network.Transmission Control Protocol be for wired networks design, The bit error rate of wire transmission environment is very low and propagation delay time very little, and slow turn-on and congestion control are that its most important agreement is special Sign.The function of Transmission Control Protocol is realized by TCP entity.If TCP entity detects the data-bag lost of transmission, that is, think Congestion has occurred on cable network, TCP entity executes congestion control, for example, reducing the transmission for sending window to reduce data packet Rate.
Currently, the data transmission of mobile cellular network is based primarily upon TCP.Due to wireless transmission environments there are the bit error rate compared with High, the defects of propagation delay time is longer, therefore, the data packet lost in wireless transmission environments is most likely because wireless channel Error code caused by.However, TCP entity just takes for that congestion has occurred when detecting the data-bag lost of transmission, that is, think The transmission window of TCP entity is excessive, so that TCP entity enters congestion control and reduces transmission window.If but and non-real hair Network congestion has been given birth to, and existing TCP entity can reduce the utilization rate of wireless channel by the way of reducing transmission window.In addition, Since the propagation delay time of wireless channel is larger, the transmission window of TCP entity is restored to maximized window from the stage compared with wicket Stage needs the long period.
For problem above existing for TCP entity, prior art is to be inserted into the TCP towards user equipment in base station side The TCP entity of entity and service-oriented device.Wherein, the TCP entity of service-oriented device is responsible for base station, equipment of the core network, server Between the data packet transmission based on Transmission Control Protocol, the TCP entity of user oriented equipment is responsible for being based between base station and user equipment The data packet of Transmission Control Protocol is transmitted.By in the TCP entity of the user oriented equipment of base station side increase slow turn-on acceleration mechanism and Congestion control mechanism improves TCP entity in the defects of wireless transmission environments.Wherein, slow turn-on acceleration mechanism is user oriented A biggish value is set by the initial window that sends in the TCP entity of equipment, that is, shortens the time of slow turn-on, to improve data Initial transmission rate.Congestion control mechanism refers to the available bandwidth of the TCP entity elder generation evaluating wireless network of user oriented equipment, In the case where detecting time-out or packet loss, if sending the corresponding transmission window of available bandwidth that window is less than estimation, no Reduce and send window, if sending the corresponding transmission window of available bandwidth that window is greater than estimation, TCP entity is according to estimation The corresponding transmission window of available bandwidth is as transmission window.However, both mechanism cannot cmpletely utilize wireless transmission band It is wide.
Summary of the invention
The embodiment of the present invention provides the transmission method and equipment of a kind of data packet, passes through the data of PDCP unit current cache Packet number come determine whether PDCP unit send data packet, can preferably adapt to wireless transmission environments in this way, improve To the utilization rate of wireless transmission bandwidth.
In a first aspect, the embodiment of the present application provides the first equipment, the first equipment includes transmission control unit, packet data Convergence protocol PDCP unit, wherein
PDCP unit is used to send caching instruction information to transmission control unit, and it is mono- that caching instruction information is used to indicate PDCP The data packet number of current cache in the corresponding spatial cache of member；
Transmission control unit is used to receive caching instruction information from PDCP unit；
Transmission control unit is used to indicate information according to caching, it is determined whether the data of the second equipment are sent to PDCP unit Packet.
According to above scheme, transmission control unit according to the data packet in the corresponding spatial cache of PDCP unit how much, really It is fixed whether to PDCP unit to transmit data packet, it is possible to reduce the corresponding spatial cache of PDCP unit is when wireless environment quality is preferable There is no data packet and when wireless environment is second-rate the case where datagram overflow, and then can preferably adapt to wireless Environmental quality improves the utilization rate to wireless transmission bandwidth.
With reference to first aspect, in the first possible implementation of first aspect, transmission control unit be also used to PDCP unit sends acquisition request, caches instruction information to obtain.
Optionally, transmission control unit can send an acquisition request to PDCP unit, and PDCP unit is set in user Standby and server TCP connection repeatedly feeds back caching instruction information, the embodiment of the present invention pair to transmission control unit during establishing The number of PDCP unit feedback caching instruction information is without limitation.Transmission control unit to PDCP unit without repeatedly sending in this way Acquisition request also can repeatedly obtain caching instruction information, reduce the time for sending acquisition request, improve caching instruction letter The acquisition efficiency of breath.
Optionally, PDCP unit can feed back caching instruction information to transmission control unit according to prefixed time interval.
With reference to first aspect or the first possible implementation of first aspect, it can be able to achieve for second in first aspect In mode, caching instruction information includes the data packet number currently cached in the corresponding spatial cache of PDCP unit；
Information is being indicated according to caching, it is determined whether in terms of the data packet that PDCP unit sends the second equipment, transmission control Unit processed is specifically used for：If transmission control unit determines that currently the data packet number that has cached is greater than first threshold, stop to PDCP unit sends the data packet of the second equipment；If transmission control unit determines the data packet number currently cached less than second Threshold value, it is determined that the data packet of the second equipment is sent to PDCP unit.
With reference to first aspect or the first possible implementation of first aspect, the third in first aspect can be able to achieve In mode, caching instruction information includes the accounting of the data packet currently cached in the corresponding spatial cache of PDCP unit；
Information is being indicated according to caching, it is determined whether in terms of the data packet that PDCP unit sends the second equipment, transmission control Unit processed is specifically used for：If transmission control unit determines that the accounting of the data packet currently cached is greater than third threshold value, stop The data packet of the second equipment is sent to PDCP unit；If transmission control unit determines that the accounting of the data packet currently cached is less than 4th threshold value, it is determined that the data packet of the second equipment is sent to PDCP unit.
With reference to first aspect or the first possible implementation of first aspect, the 4th kind in first aspect can be able to achieve In mode, caching instruction information includes the high instruction information of caching or the low instruction information of caching；
Information is being indicated according to caching, it is determined whether in terms of the data packet that PDCP unit sends the second equipment, transmission control Unit processed is specifically used for：If caching instruction information is the high instruction information of caching, stop sending the second equipment to PDCP unit Data packet；If caching instruction information is to cache low instruction information, it is determined that send the data packet of the second equipment to PDCP unit.
Optionally, the high instruction information of caching or the low instruction information of caching are the data packet numbers by currently having cached come really Fixed.The high instruction information of caching indicates that the data packet number currently cached is greater than the 5th threshold value；Caching low instruction information indicates The data packet number currently cached is less than the 6th threshold value.Alternatively, the high instruction information of caching or the low instruction information of caching are to pass through Currently the data packet number that has cached determines that cache high instruction information indicate in the accounting of the corresponding spatial cache of PDCP entity The data packet number currently cached is greater than the 7th threshold value；Caching low instruction information indicates that the data packet number currently cached is small In the 8th threshold value.
Optionally, the corresponding spatial cache of PDCP unit being related in the first aspect is used alone slow for PDCP unit Deposit space.For example, the first equipment is that PDCP unit is assigned with individual spatial cache, which is only capable of by PDCP unit institute It uses, i.e., the data packet currently cached only includes the data packet of PDCP unit caches.
Alternatively, the first equipment further includes RLC unit；The corresponding spatial cache of PDCP unit being related in the first aspect is The spatial cache that PDCP unit and RLC unit are used in conjunction with.For example, the first equipment is that PDCP unit and RLC unit are assigned with one Spatial cache, the spatial cache can be used by PDCP unit and RLC unit, i.e., the data packet currently cached includes PDCP mono- The data packet of member caching and the data packet of RLC caching.
With reference to first aspect, in the 5th kind of possible implementation of first aspect, transmission control unit is specifically used for true It is fixed whether the data packet for allowing and not sending to the second equipment to be sent to PDCP unit.
With reference to first aspect, the possible implementation of the first of first aspect, second of first aspect can the side of being able to achieve Formula, the third possible implementation of first aspect, the 4th kind of possible implementation of first aspect, the 5th kind of first aspect Possible implementation, in the 6th kind of possible implementation of first aspect, if the first equipment is user equipment, the second equipment is Base station, then transmission control unit is also used to receive the transmission control instructions information of the second equipment transmission, transmits control instructions information It is two connections that base station, which is used to indicate, by the connection truncation between user equipment and server；
Wherein, two connections are respectively to participate in the connection under control in transmission control unit between user equipment and base station, And the transmission control protocol TCP connection between base station and server.
With reference to first aspect, the possible implementation of the first of first aspect, second of first aspect can the side of being able to achieve Formula, the third possible implementation of first aspect, the 4th kind of possible implementation of first aspect, the 5th kind of first aspect Possible implementation, in the 7th kind of possible implementation of first aspect, the first equipment is base station, and the second equipment sets for user It is standby.
Second aspect, for the embodiment of the invention provides a kind of data pack transmission method, method includes：
First equipment obtains caching instruction information, and it is corresponding that caching instruction information is used to indicate the PDCP unit in the first equipment Spatial cache in current cache data packet number；
First equipment indicates information according to caching, it is determined whether the data packet of the second equipment is sent to PDCP unit.
According to above scheme, the first equipment according to the data packet in the corresponding spatial cache of PDCP unit how much, determination is It is no to transmit data packet to PDCP unit, it is possible to reduce the corresponding spatial cache of PDCP unit does not have when wireless environment quality is preferable Data packet and occur the case where datagram overflow when wireless environment is second-rate, and then can preferably adapt to wireless environment Quality improves the utilization rate to wireless transmission bandwidth.
In a kind of mode in the cards, before the first equipment obtains caching instruction information, further include：
First equipment sends acquisition request to PDCP unit, caches instruction information to obtain.
In a kind of mode in the cards, caching instruction information include in the corresponding spatial cache of PDCP unit it is current The data packet number of caching；
First equipment indicates information according to caching, it is determined whether the data packet for sending the second equipment to PDCP unit is specifically held Row：If the first equipment determines that the data packet number currently cached is greater than first threshold, stop sending second to PDCP unit The data packet of equipment；If the first equipment determines that the data packet number currently cached is less than second threshold, it is determined that mono- to PDCP Member sends the data packet of the second equipment.
In a kind of mode in the cards, caching instruction information include in the corresponding spatial cache of PDCP unit it is current The accounting of the data packet of caching；
First equipment indicates information according to caching, it is determined whether the data packet for sending the second equipment to PDCP unit is specifically held Row：If the first equipment determines that the accounting of data packet currently cached is greater than third threshold value, stop sending the to PDCP unit The data packet of two equipment；If the first equipment determines the accounting of the data packet currently cached less than the 4th threshold value, it is determined that PDCP unit sends the data packet of the second equipment.
In a kind of mode in the cards, caching instruction information includes the high instruction information of caching or the low instruction letter of caching Breath；
First equipment indicates information according to caching, it is determined whether the data packet for sending the second equipment to PDCP unit is specifically held Row：If caching instruction information is the high instruction information of caching, stop the data packet that the second equipment is sent to PDCP unit；If caching Indicate that information is to cache low instruction information, it is determined that the data packet of the second equipment is sent to PDCP unit；
Optionally, the high instruction information of caching or the low instruction information of caching are the data packet numbers by currently having cached come really Fixed.The high instruction information of caching indicates that the data packet number currently cached is greater than the 5th threshold value；Caching low instruction information indicates The data packet number currently cached is less than the 6th threshold value.Alternatively, the high instruction information of caching or the low instruction information of caching are to pass through Currently the data packet number that has cached determines that cache high instruction information indicate in the accounting of the corresponding spatial cache of PDCP entity The data packet number currently cached is greater than the 7th threshold value；Caching low instruction information indicates that the data packet number currently cached is small In the 8th threshold value.
In a kind of mode in the cards, the first equipment indicates information according to caching, it is determined whether sends out to PDCP unit The data packet of the second equipment is sent specifically to execute：First equipment indicates information according to caching, it is determined whether sends and permits to PDCP unit Perhaps the data packet not sent and to the second equipment.
In a kind of mode in the cards, if the first equipment is user equipment, the second equipment is base station, then method is also wrapped It includes：
First equipment receives the transmission control instructions information that the second equipment is sent, and transmission control instructions information is used to indicate base Standing the connection truncation between user equipment and server is two connections；
Wherein, two connections are respectively the connection between user equipment and base station in the case where the first equipment participates in controlling, and Transmission control protocol TCP connection between base station and server.
In a kind of mode in the cards, the first equipment is base station, and the second equipment is user equipment.
In a kind of mode in the cards, the corresponding spatial cache of PDCP unit is the caching that PDCP unit is used alone Space.
In a kind of mode in the cards, the first equipment further includes radio link layer control protocol RLC unit；PDCP is mono- The corresponding spatial cache of member is the spatial cache that PDCP unit and RLC unit are used in conjunction with.
The embodiment of the present application third aspect provides a kind of first equipment, and the first equipment, which has, realizes first aspect method In the first equipment behavior function.Function can also execute corresponding software realization by hardware realization by hardware.Firmly Part or software include one or more modules corresponding with above-mentioned function.
In a kind of mode in the cards, the first equipment includes processor and transceiver, processor, for obtaining caching Indicate that information, caching instruction information are used to indicate the number of current cache in the corresponding spatial cache of PDCP unit in the first equipment According to packet quantity；Processor is also used to indicate information according to caching, it is determined whether the data packet of the second equipment is sent to PDCP unit； If needing to send, the data packet of the second equipment is sent by transceiver.
Based on the same inventive concept, the principle and beneficial effect that the first equipment solves the problems, such as may refer to first aspect Method and brought beneficial effect, the implementation of the first equipment may refer to the implementation of the first equipment of first aspect side method, Overlaps will not be repeated.
Fourth aspect, to store program code in the storage medium the embodiment of the invention provides a kind of storage medium, When the program code is run by calculating equipment, one kind of any one implementation offer of first aspect or first aspect is executed Data pack transmission method.
5th aspect, for the embodiment of the invention provides a kind of computer program product, which, which is calculated, is set When received shipment row, a kind of data pack transmission method of any one implementation offer of first aspect or first aspect is executed.
6th aspect, this application provides a kind of chip system, which includes processor, for supporting that first sets It is standby to realize function involved in above-mentioned aspect, for example, according to the data packet in the corresponding spatial cache of PDCP unit how much, really It is fixed whether to PDCP unit to transmit data packet.In a kind of possible design, chip system further includes memory, and memory is used In the necessary program instruction of the first equipment of preservation and data.The chip system, can be made of chip, also may include chip and Other discrete devices.
In embodiments of the present invention, transmission control unit is more according to the data packet in the corresponding spatial cache of PDCP unit It is few, it is determined whether to transmit data packet to PDCP unit, it is possible to reduce the corresponding spatial cache of PDCP unit is in wireless environment quality There is no data packet and when wireless environment is second-rate the case where datagram overflow when preferably, and then can preferably fit Wireless environment quality is answered, the utilization rate to wireless transmission bandwidth is improved.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly or in background technique below will be implemented the present invention Attached drawing needed in example or background technique is illustrated.
Fig. 1 is for a kind of possible network architecture diagram provided in an embodiment of the present invention；
Fig. 2 is for a kind of possible network architecture diagram provided in an embodiment of the present invention；
Fig. 3 is for a kind of possible network architecture diagram provided in an embodiment of the present invention；
Fig. 4 is for a kind of flow diagram of data pack transmission method provided in an embodiment of the present invention；
Fig. 5 is for a kind of flow diagram of data pack transmission method provided in an embodiment of the present invention；
Fig. 6 (1) to Fig. 6 (3) is for a kind of method that transmission control unit sends data packet provided in an embodiment of the present invention Exemplary diagram；
Fig. 7 (1) to Fig. 7 (3) is the side that data packet is sent for another transmission control unit provided in an embodiment of the present invention The exemplary diagram of method；
Fig. 8 is for a kind of structural schematic diagram of first equipment provided in an embodiment of the present invention；
Fig. 9 is for the structural schematic diagram of another first equipment provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described with reference to the attached drawing in the embodiment of the present invention.
The application in order to facilitate understanding is below introduced the possible network architecture diagram that the application is applicable in.It refers to Fig. 1, Fig. 2 and Fig. 3, respectively the embodiment of the invention provides a kind of possible network architecture diagrams.Fig. 1, Fig. 2 or Fig. 3 are with the net Network architecture diagram be evolution grouping system (Evolved Packet System, EPS) network architecture for be described.Wherein, EPS includes the packet-based core networks (Evolved of long term evolution (Long Term Evolution, LTE) access net, evolution Packet Core, EPC) and server.With further reference to Fig. 1, Fig. 2 or Fig. 3, the part of LTE access net includes Fig. 1, Fig. 2 Or the base station in Fig. 3, the part of EPC include the equipment of the core network in Fig. 1, Fig. 2 or Fig. 3.In practical application, equipment of the core network can To include mobility management entity (Mobility Management Entity, MME), GPRS serving GPRS support node (Serving GPRS Support Node, SGSN), PDN Gateway (PDN Gateway, P-GW), gateway (S-GW, Serving Gateway), at least one in home signature user server (Home Subscriber Server, HSS).
In EPS, the TCP connection established between server and user equipment is generally divided into two portions according to Linktype Point.One part is server, equipment of the core network, the TCP connection between base station, and the connection of this part is the company by wire link It connects.Another part is the TCP connection between base station and user equipment, and the connection of this part is the connection by Radio Link.Due to Transmission Control Protocol is that the bit error rate of wire transmission environment is very low and propagation delay time very little for wired networks design, slow turn-on and is gathered around Plug control is its most important protocol characteristic.The function of Transmission Control Protocol is realized by TCP entity.If TCP entity detects hair The data-bag lost sent thinks that congestion has occurred on wired networks, TCP entity executes congestion control, sends for example, reducing Window is to reduce the transmission rate of data packet.
It wherein, is to be connected between base station and user equipment by Uu interface in LTE access net.In base station and user It include transport layer, IP layers, Packet Data Convergence Protocol (Packet Data in user plane protocol structure between equipment Convergence Protocol, PDCP) layer, radio link layer control (Radio Link Control, RLC) layer, media connect Enter control (Media Access Control, MAC) layer, physics (Physical) layer.
Data packet is transmitted between base station and user equipment is specifically：For sending the field of data packet from base station to user equipment Jing Zhong, the transport layer of base station by data packet through in base station IP layer, PDCP layers, rlc layer, MAC layer, physical layer transmission to user set It is standby, physical layer, MAC layer, rlc layer specifically through user equipment, the transport layer of PDCP layers of arrival user equipment.For from Family equipment is sent to base station in the scene of data packet, and user equipment is by data packet through transport layer, IP layers, PDCP layers, rlc layer, MAC The transport layer of layer, physical layer transmission to base station, physical layer, MAC layer, rlc layer, PDCP layers of arrival transport layer specifically through base station 's.
It is to be connected in EPC system, between base station and equipment of the core network by Iu interface.It is set in base station and core net In standby user plane protocol structure include physical (L1)), data link layer (L2), User Datagram Protocol (User Datagram Protocol, UDP)/IP layers, user face tunnel protocol (GPRS Tunneling Protocol-User Plane, GTP-U) layer.It is connected between equipment of the core network and server by network (Internet), in the user of server Face protocol architecture includes L1, L2, IP layers, transport layer.
Next, being said respectively by Fig. 1, Fig. 2, Fig. 3 to the transport layer of wire link and the transport layer of Radio Link It is bright.Here in order to distinguish the new transmission controlled entity in existing TCP entity and the embodiment of the present invention, it is ordered respectively Name：The new transmission controlled entity of the embodiment of the present invention is named as the first transmission controlled entity；Existing TCP entity is named as Two transmission controlled entities, the embodiment of the present invention is to the new transmission controlled entity in existing TCP entity and the embodiment of the present invention Title without limitation.Wherein, the corresponding transmission control protocol of the second transmission controlled entity includes TCP；First transmission control is real The corresponding transmission control protocol of body is new transmission control protocol, and optionally, new transmission control protocol is not limited to assist with TCP It is realized based on view, udp protocol etc..
In embodiments of the present invention, data transmission can may be implemented in the first transmission controlled entity between PDCP entity. Optionally, one kind is the data of non-data packet, for example, caching instruction information, acquisition request etc.；Under this case, the first transmission Controlled entity and PDCP entity are across IP layers to transmit data, specifically：First transmission controlled entity will be obtained across IP layers Request is taken to be sent to PDCP entity, caching instruction information is sent to the first transmission controlled entity across IP layers by PDCP entity.It changes Sentence is talked about, and caching instruction information or acquisition request can be without IP layers.Another kind of is the data for needing to be sent to the second equipment The data packet is sent to IP layers, after IP layers execute the operations such as IP encapsulation to data packet, will sealed by packet, the first transmission controlled entity IP data packet after dress is sent to PDCP layers.
In the possible network architecture shown in Fig. 1, in the part of service-oriented device, the transport layer of base station is to pass through insertion What the second transmission controlled entity of service-oriented device was realized, the transport layer of server still uses existing Transmission Control Protocol, i.e., second passes Defeated controlled entity.By being inserted into the second transmission controlled entity towards server in a base station, realize to wire transmission environment and The truncation that data packet is transmitted in wireless transmission environments." truncation " refers to base station by a connection between user equipment and server Truncation is two connections；Wherein, two connections are respectively to participate in control in the first transmission controlled entity between user equipment and base station The TCP connection between connection and base station and server under system.In the part of user oriented equipment, the transport layer of base station is It is realized by insertion the first transmission controlled entity, the data transmission under control is participated in for realizing the first transmission controlled entity Function.The transport layer of user equipment can still use existing Transmission Control Protocol, i.e., the second transmission controlled entity.First transmission control is real Body for realizing data packet between base station and user equipment transmission, and in base station first transmission controlled entity can with towards The transmission of data packet is realized between second transmission controlled entity of server.
First transmission controlled entity of the network architecture based on Fig. 1, base station receives caching instruction from the PDCP entity of base station Information, caching instruction information are used to indicate the data packet number currently cached in the corresponding spatial cache of PDCP entity；First It transmits controlled entity and information is indicated according to caching, it is determined whether send the data packet of user equipment to PDCP entity.If PDCP is real Currently the data packet number that has cached is less in the corresponding spatial cache of body, the first transmission controlled entity of base station determine continue to PDCP entity sends data packet；If the data packet number currently cached in the corresponding spatial cache of PDCP entity is more, base station First transmission controlled entity determine stop to PDCP entity send data packet.Therefore, the first transmission controlled entity is according to PDCP How much is data packet in the corresponding spatial cache of entity, it is determined whether to PDCP entity transmitting data packet, it is possible to reduce PDCP is real The corresponding spatial cache of body does not have data packet and the data packet when wireless environment is second-rate when wireless environment quality is preferable The case where spilling, occurs, and then can preferably adapt to wireless environment quality, improves the utilization rate to wireless transmission bandwidth.
In the possible network architecture shown in Fig. 2, in the part of service-oriented device, the transport layer of base station is to pass through insertion What the second transmission controlled entity of service-oriented device was realized, the transport layer of server still uses existing Transmission Control Protocol, i.e., second passes Defeated controlled entity.By being inserted into the second transmission controlled entity towards server in a base station, realize to wire transmission environment and The truncation that data packet is transmitted in wireless transmission environments.In the part of user oriented equipment, the transport layer point of base station and user equipment It is not to be realized by insertion the first transmission controlled entity, participates in the data under control for realizing the first transmission controlled entity and pass Defeated function, the first transmission controlled entity for realizing data packet between base station and user equipment transmission, and the in base station One transmission controlled entity can realize the transmission of data packet between the second transmission controlled entity of service-oriented device.
The first transmission controlled entity is inserted in the network architecture based on Fig. 2, base station and user equipment respectively, it will be comprising the The communication equipment of one transmission controlled entity is named as the first equipment, and received data packet equipment is named as the second equipment.Fig. 2's In example, under the scene of downstream packet transmission, base station is the first equipment, and user equipment is the second equipment；In upstream data Under the scene for wrapping transmission, base station is the second equipment, and user equipment is the first equipment.First equipment first transmission controlled entity from The PDCP entity of first equipment receives caching instruction information, and caching instruction information is used to indicate the corresponding spatial cache of PDCP entity In the current data packet number that has cached；First transmission controlled entity indicates information according to caching, it is determined whether to PDCP entity Send the data packet of the second equipment.If the data packet number currently cached in the corresponding spatial cache of PDCP entity is less, the First transmission controlled entity of one equipment, which determines, to be continued to send data packet to PDCP entity；If the corresponding spatial cache of PDCP entity In currently the data packet number that has cached it is more, the first transmission controlled entity of the first equipment, which determines, to be stopped sending to PDCP entity Data packet.Therefore, first transmission controlled entity according to the data packet in the corresponding spatial cache of PDCP entity how much, it is determined whether To PDCP entity transmitting data packet, it is possible to reduce the corresponding spatial cache of PDCP entity is not counted when wireless environment quality is preferable Occur according to packet and when wireless environment is second-rate the case where datagram overflow, and then can preferably adapt to wireless environment matter Amount, improves the utilization rate to wireless transmission bandwidth.
In the possible network architecture shown in Fig. 3, the transport layer of base station inserts the second transmission control of service-oriented device Second transmission controlled entity of entity and user oriented equipment processed, the transport layer of server still use existing Transmission Control Protocol, i.e., and the Two transmission controlled entities.Second biography of base station second transmission controlled entity towards server and user oriented equipment by insertion Defeated controlled entity realizes the truncation transmitted to data packet in wire transmission environment and wireless transmission environments.The transmission of user equipment Layer is realized by insertion the first transmission controlled entity, is participated in the data under control for realizing the first transmission controlled entity and is passed Defeated function, first transmits controlled entity for realizing the transmission of data packet between base station and user equipment.Optionally, in base station Second transmission controlled entity of user oriented equipment and the second transmission controlled entity of service-oriented device can be one second biography Defeated controlled entity, and the transmission of data packet can be realized with user equipment or server respectively.
First transmission controlled entity of the network architecture based on Fig. 3, user equipment is received from the PDCP entity of user equipment Caching instruction information, caching instruction information are used to indicate the number-of-packet currently cached in the corresponding spatial cache of PDCP entity Amount；First transmission controlled entity indicates information according to caching, it is determined whether the data packet of base station is sent to PDCP entity.If PDCP The data packet number currently cached in the corresponding spatial cache of entity is less, and the first transmission controlled entity of user equipment determines Continue to send data packet to PDCP entity；If in the corresponding spatial cache of PDCP entity currently the data packet number that has cached compared with More, the first transmission controlled entity of user equipment, which determines, to be stopped sending data packet to PDCP entity.Therefore, the first transmission control is real Body according to the data packet in the corresponding spatial cache of PDCP entity how much, it is determined whether, can be with to PDCP entity transmitting data packet Reduce the corresponding spatial cache of PDCP entity do not have when wireless environment quality is preferable data packet and wireless environment quality compared with Occur the case where datagram overflow when poor, and then can preferably adapt to wireless environment quality, improves to wireless transmission bandwidth Utilization rate.
The embodiment of the present invention can be applied in other communication systems for sending data packet, such as：EPS system, the whole world are mobile (Global System of Mobile communication, the GSM) system, CDMA (Code Division of communicating Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), LTE frequency division Duplexing (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD), next generation communication system (for example, 5G communication system) etc..Term " system " can be replaced mutually with " network ".The present invention The system architecture of embodiment description is the technical solution in order to more clearly illustrate the embodiment of the present invention, is not constituted for this Inventive embodiments provide technical solution restriction, those of ordinary skill in the art it is found that with the network architecture differentiation, this hair The technical solution that bright embodiment provides is equally applicable for similar technical problem.
Base station involved in the embodiment of the present invention is that one kind is deployed in wireless access network to provide for user equipment The device of wireless communication function.The base station may include various forms of macro base stations, micro-base station (also becoming small station), relaying It stands, access point etc..In the system using different wireless access technologys, the title for having the equipment of base station functions be might have Institute is different, for example, becoming the node B (evolved NodeB, ENB or eNodeB) of evolution in LTE system, in the third generation (3rdGeneration, 3G) in system, become node B (Node B) etc..
Involved user equipment may include various there is the hand-held of wireless communication function to set in the embodiment of the present invention Standby, mobile unit, wearable device calculate equipment or are connected to other processing equipments of radio modem.The user Equipment is referred to as mobile station (mobile station, MS), terminal (terminal), terminal device (terminal It equipment), can also include subscriber unit (subscribe unit), cellular phone (cellular phone), intelligence electricity Talk about (smart phone), wireless data card, personal digital assistant (personal digital assistant, PDA) computer, Plate computer, radio modem (modem), handheld device (handheld), laptop computer (laptop Computer), wireless phone (cordless phone) or wireless local loop (wireless local loop, WLL) platform, Machine type communication (machine type communication, MTC) terminal etc..For convenience of description, all implementations of the present invention In example, apparatus mentioned above is referred to as user equipment.
Base station, user equipment in the embodiment of the present invention can have other titles.As long as the function and sheet of each equipment Invent it is similar, within the scope of the claims of the present invention and its equivalent technology.
Next, being based on Fig. 1, Fig. 2, the network architecture shown in Fig. 3, Fig. 4 shows that the embodiment of the invention provides one kind The flow diagram of data pack transmission method.This method is executed by the interaction between user equipment, base station, server 's.Since in heterogeneous networks framework, same equipment may correspond to different transmission controlled entities, here in order to distinguish each equipment In first transmission controlled entity, second transmission controlled entity, in introduced below, user equipment first transmission controlled entity It is indicated with the first transmission controlled entity A1；Second transmission controlled entity of user equipment is with the second transmission controlled entity A2 come table Show；First transmission controlled entity of base station is indicated with the first transmission controlled entity B1；The second of service-oriented device passes in base station Defeated controlled entity is indicated with the second transmission controlled entity B21；The second transmission controlled entity of user oriented equipment is used in base station Second transmits controlled entity B22 to indicate；Second transmission controlled entity of server is named as the second transmission controlled entity C2.Tool Body please refers to the detailed description of following steps 101 to step 110.
101, user equipment sends SYN request to server.
For example, user equipment sends SYN to server in the case where user equipment needs to establish connection with server (synchronous) it requests, base station requests SYN to carry out transparent transmission.
For example, being based on the network architecture shown in FIG. 1, transparent transmission SYN request in base station is specifically：First transmission control of base station is real Body B1 receives the SYN request that user equipment is sent, and SYN request is sent to service-oriented in base station by the first transmission controlled entity B1 SYN request is sent to server by the second transmission controlled entity B21 of device, the second transmission controlled entity B21 of service-oriented device. Optionally, before executing step 101, the second transmission of the first transmission controlled entity B1 and service-oriented device is set in a base station Controlled entity B21；And in user equipment setting the second transmission controlled entity A2, and the second transmission of setting control in the server Entity C2 processed.
For example, being based on the network architecture shown in Fig. 2, transparent transmission SYN request in base station is specifically：First transmission control of base station is real Body B1 receives the SYN request that user equipment is sent, and SYN request is sent to service-oriented in base station by the first transmission controlled entity B1 SYN request is sent to server by the second transmission controlled entity B21 of device, the second transmission controlled entity B21 of service-oriented device. Optionally, before executing step 101, the second transmission of the first transmission controlled entity B1 and service-oriented device is set in a base station Controlled entity B21；And the first transmission of setting controlled entity A1 in a user device；And the second transmission of setting in the server Controlled entity C2.
For example, being based on the network architecture shown in Fig. 3, transparent transmission SYN request in base station is specifically：The user oriented equipment of base station Second transmission controlled entity B22 receives the SYN request that user equipment is sent, the second transmission controlled entity of user oriented equipment SYN request is sent to the second transmission controlled entity B21 of service-oriented device in base station by B22, and second transmits controlled entity for SYN Request is sent to server.Optionally, before executing step 101, the first transmission controlled entity A1 is set in a user device, Second transmission controlled entity B22 of user oriented equipment and the second transmission controlled entity of service-oriented device are set in a base station B21；And controlled entity C2 is transmitted in setting second in the server.
Correspondingly, server receives the SYN request that user equipment is sent.
102, the response message that server is requested to user equipment feedback SYN.
For example, being based on the network architecture shown in FIG. 1, server is rung after receiving the SYN request of user equipment transmission It answers SYN to request, and establishes the response message of connection to user equipment feedback acknowledgment.For example, the response message is that SYN ACK disappears Breath.The response message that SYN is requested in base station carries out transparent transmission.Base station transparent transmission response message is specifically：The service-oriented device of base station Second transmission controlled entity B21 receives the response message that server is sent, and the second transmission controlled entity B21 of service-oriented device will Response message is sent to use by the first transmission controlled entity B1, the first transmission controlled entity B1 that response message is sent in base station Family equipment.
For another example, it is based on the network architecture shown in Fig. 2, server is rung after receiving the SYN request of user equipment transmission It answers SYN to request, and establishes the response message of connection to base station feedback confirmation, for example, feedback SYN ACK message.Specifically：Service The response message of device second transmission controlled entity B21 feedback SYN request of service-oriented device into base station, the of service-oriented device Two transmission controlled entity B21 receive the response message, and the response message is forwarded to the first transmission controlled entity in base station B1。
Correspondingly, the first transmission controlled entity B1 of base station receives server and sends response message.A kind of optional mode In, which can be pass-through to user equipment by the base station, and send transmission control instructions information to user equipment.Phase Ying Di, the user equipment receive the response message and the transmission control instructions information respectively.Another optional mode In, the base station can increase transmission control instructions message in the response message, and first transmits controlled entity B1 to the use Family equipment sends the response message after increasing the transmission control instructions information.Correspondingly, the user equipment is received to increase and be passed Response message after defeated control instructions information.
Control instructions message is transmitted involved in embodiments of the present invention, is used to indicate the base station and is set the user Standby one between server connects truncation as two connections；Wherein, it is described two connection be respectively the user equipment and It is participated between connection and the base station and the server under control between the base station in the first transmission controlled entity TCP connection.In the network architecture shown in Fig. 2, base station is by the first transmission controlled entity B1 of insertion and service-oriented device Second transmission controlled entity B21 connects what truncation connected for two for one to realize.
For example, the first transmission controlled entity B1 can reserved field in the tcp header preset field is written, Above-mentioned transmission control instructions message is indicated to user equipment with this.Wherein, the reserved field in TCP header is 6 bit, for example, Preset field can be 111110, and such user equipment can determine base station using first after receiving the response message It transmits controlled entity B1 and transmits data packet, and be two connections by a connection truncation.
For another example, it is based on the network architecture shown in Fig. 3, server is rung after receiving the SYN request of user equipment transmission It answers SYN to request, and establishes the response message of TCP connection to base station feedback confirmation, for example, feedback SYN ACK message.Specifically： The response message that server is requested to the second transmission controlled entity B21 feedback of the service-oriented device of base station for SYN, towards clothes The second of the user oriented equipment that second transmission controlled entity B21 of business device receives the response message, and is forwarded in base station passes Defeated controlled entity B22.
Correspondingly, the second transmission controlled entity B22 of the user oriented equipment of base station receives the response message.It is a kind of optional Mode in, which can be pass-through to user equipment by the base station, and send transmission control instructions to user equipment Information.Correspondingly, the user equipment receives the response message and the transmission control instructions information respectively.It is another optional Mode in, the base station can increase in the response message transmission control instructions message, user oriented equipment second pass Defeated controlled entity B22 sends the response message after increasing the transmission control instructions information to the user equipment.Correspondingly, institute It states user equipment and receives the response message after increasing transmission control instructions information.
In the network architecture shown in Fig. 3, base station is by being inserted into the second transmission controlled entity B22 towards user equipment Connect what truncation connected for two for one to realize with the second transmission controlled entity B21 of service-oriented device.
For example, the second transmission controlled entity B22 of the user oriented equipment can reserved word in the tcp header Section write-in preset field, indicates above-mentioned transmission control instructions message to user equipment with this.Wherein, the reserved word in TCP header Section is 6 bit, for example, preset field can be 111101, such user equipment, can after receiving the response message It determines that data packet is transmitted using the second transmission controlled entity B22 of user oriented equipment in base station, and there is break-in facility.
103, user equipment sends confirmation message to server.
For example, user equipment is sent out to server in the case where user equipment receives the response message of server feedback Confirmation message is sent, which indicates that user equipment has been received by the response message of server feedback, illustrates user equipment kimonos Connection between business device has been established.Base station will confirm that message carries out transparent transmission.
For example, being based on the network architecture shown in fig. 1 or fig. 2, the process of base station transparent transmission confirmation message is specifically：The of base station One transmission controlled entity B1 receives the confirmation message that user equipment is sent, and the first transmission controlled entity B1 will confirm that message is sent to The second transmission controlled entity B21 of service-oriented device, the second transmission controlled entity will confirm that message is sent to server in base station.
For example, being based on the network architecture shown in Fig. 3, the process of base station transparent transmission confirmation message is specifically：Base station towards with Second transmission controlled entity B22 of family equipment receives the confirmation message that user equipment is sent, the second transmission of user oriented equipment Controlled entity B22 will confirm that message is sent to the second transmission controlled entity B21 of service-oriented device in base station, service-oriented device Second transmission controlled entity B21 will confirm that message is sent to server.
Correspondingly, server receives the confirmation message that user equipment is sent.
104, the transmission of data packet is realized between base station and server.
Wherein, the data packet between base station and server includes that the downlink data packet of user equipment is sent to by server, And/or the upstream data packet of server is sent to by user equipment.
For example, being based on the network architecture shown in fig. 1 or fig. 2, in the part of user oriented equipment, the transport layer of base station is the One transmission controlled entity B1；In the part of service-oriented device, the transport layer of base station is the second transmission control by service-oriented device Entity B 21 is realized.Further, for downlink data packet, downlink data packet is first sent to core net by server Second transmission controlled entity B21 of equipment, the service-oriented device by equipment of the core network being sent to downlink data packet in base station again； For upstream data packet, the second transmission controlled entity B21 of service-oriented device receives the first transmission controlled entity of base station The upstream data packet of B1 forwarding, then upstream data packet is sent to server by equipment of the core network, thereby realize base station The transmission of data packet between server.
For another example, be based on the network architecture shown in Fig. 3, in the part of user oriented equipment, the transport layer of base station be towards with The second of family equipment transmits controlled entity B22 to realize；In the part of service-oriented device, the transport layer of base station is by towards clothes The second of business device transmits controlled entity B21 to realize.Further, for downlink data packet, server is first by downlink Data packet be sent to equipment of the core network, the service-oriented device by equipment of the core network being sent to downlink data packet in base station again Two transmission controlled entity B21, service-oriented device second transmission controlled entity B21 by downlink data packet be transmitted to base station towards Second transmission controlled entity B22 of user equipment；For upstream data packet, the second transmission controlled entity receives the face of base station The upstream data packet forwarded to the second transmission controlled entity B22 of user equipment, then upstream data packet is passed through into equipment of the core network It is sent to server, thereby realizes the transmission of the data packet between base station and server.
105, the transmission of data packet is realized between user equipment and base station.
For example, the data packet between user equipment and base station includes being sent to the downlink data packet of user equipment by server And/or the upstream data packet of server is sent to by user equipment.Step 201 is to step in specific embodiment shown in Figure 5 Rapid 205 detailed description.
106, user equipment sends Fin request to server.
For example, if user equipment initiates to disconnect and server due to completing downlink data packet reception or other reasons In the case where connection, user equipment sends Fin (Finish) request to server.
Correspondingly, server receives the Fin request that user equipment is sent.
After the server receives the Fin request of user equipment transmission, to the sound of user equipment feedback Fin request Message is answered, can specifically be realized by step 107,109.In addition, user equipment and base station confirm to server feedback respectively Message can specifically be realized by step 108 and step 110.Refer to the detailed description of following steps 107 to step 110.
107, the response message that server is requested to base station feedback Fin.
For example, server responds Fin request, i.e., after the server receives the Fin request of user equipment transmission The response message of the connection of the user equipment, such as feedback Fin ACK message are disconnected to base station feedback.Correspondingly, based on figure 1, Fig. 2 or network architecture diagram shown in Fig. 3, the second transmission controlled entity B21 of service-oriented device receives Fin request in base station Response message.
108, base station sends confirmation message to server.
Correspondingly, server receives the confirmation message, which indicates that base station has been received by the sound of server feedback Message is answered, illustrates that the TCP connection between base station and server has disconnected.
For example, it is based on Fig. 1, Fig. 2 or network architecture diagram shown in Fig. 3, the second transmission control of service-oriented device in base station Entity B 21 is after the response message for the Fin request for receiving server feedback, the second transmission control of service-oriented device in base station Entity B 21 processed sends confirmation message to server, which is forwarded to the transport layer of access mesh portions.
For example, it is based on network architecture diagram shown in fig. 1 or fig. 2, the second transmission control of service-oriented device in base station The response message that entity B 21 is requested to the first transmission controlled entity B1 forwarding Fin.Optionally, service-oriented device in a base station Second transmission controlled entity B21 is not completed before the first transmission controlled entity B1 transmission downlink data packet, service-oriented device Second transmission controlled entity B21 does not execute step 108.
Again for example, it is based on network architecture diagram shown in Fig. 3, the second transmission controlled entity of service-oriented device in base station The response message that B21 is requested to the second transmission controlled entity B22 forwarding Fin of user oriented equipment.Optionally, face in a base station It is not completed under the second transmission controlled entity B22 transmission of user oriented equipment to the second transmission controlled entity B21 of server Before row data packet, the second transmission controlled entity B21 of service-oriented device does not execute step 108.
109, base station sends the response message that Fin is requested to user equipment.
For example, being based on network architecture diagram shown in fig. 1 or fig. 2, received in the first transmission controlled entity B1 service-oriented Device second transmission controlled entity B21 forwarding Fin request response message after, if first transmission controlled entity B1 complete to After the downlink data packet that user equipment is sent, the response message that Fin is requested is sent to user equipment.
For example, being based on network architecture diagram shown in Fig. 3, received in the second transmission controlled entity B22 of user oriented equipment To after the response message of the Fin request of the second transmission controlled entity B21 forwarding of service-oriented device, if user oriented equipment Second transmission controlled entity B22 is completed after the downlink data packet that user equipment is sent, and sends what Fin was requested to user equipment Response message.
Correspondingly, the user equipment receives the response message for the Fin request that the base station is sent.
110, user equipment sends confirmation message to base station.
For example, user equipment is sent out to base station after the response message that the user equipment receives that Fin is requested in base station Confirmation message is sent, which indicates that user equipment has been received by the response message of base station feedback, further illustrates user equipment The connection under control is participated in the first transmission controlled entity between base station to have disconnected.
Next, refer to Fig. 5, for the embodiment of the invention provides a kind of flow diagram of data pack transmission method, Such as figure, shown in 5, the method is executed jointly by the transmission control unit and PDCP unit of the first equipment, specifically includes step Rapid 201 to step 205.
For example, be based on the network architecture shown in FIG. 1, for being sent to the upstream data packet of server by user equipment Upstream data packet is sent to the first transmission controlled entity B1 of base station by speech, the second transmission controlled entity A2 of user equipment, the Upstream data packet is sent to the second transmission controlled entity B21 of service-oriented device in base station by one transmission controlled entity B1, with reality The existing transmission of upstream data packet between the user equipment and the base station.
Based on the network architecture shown in FIG. 1, for being sent to the downlink data packet of user equipment by server, under this Row data packet sending method is realized by the first transmission controlled entity B1 in base station and the PDCP entity interaction in base station.? Under this case, the first equipment in embodiment illustrated in fig. 5 indicates base station；The second equipment in embodiment illustrated in fig. 5 indicates to use Family equipment；Transmission control unit indicates the first transmission controlled entity B1 in embodiment illustrated in fig. 5；PDCP in embodiment illustrated in fig. 5 The PDCP entity of unit expression base station.
For another example, it is based on the network architecture shown in Fig. 2, for being sent to the upstream data packet of server by user equipment Upstream data packet is sent to the first transmission controlled entity B1 of base station by speech, the first transmission controlled entity A1 of user equipment, with Make the first transmission controlled entity B1 that upstream data packet is sent to server.Under this case, in embodiment illustrated in fig. 5 first Equipment indicates user equipment；The second equipment in embodiment illustrated in fig. 5 indicates base station；Transmission control is single in embodiment illustrated in fig. 5 Member indicates the first transmission controlled entity A1；PDCP unit indicates the PDCP entity of user equipment in embodiment illustrated in fig. 5.
Based on the network architecture shown in Fig. 2, for being sent to the downlink data packet of user equipment by server, under this Row data packet sending method is realized by the first transmission controlled entity B1 in base station and the PDCP entity interaction in base station.? Under this case, the first equipment in embodiment illustrated in fig. 5 indicates base station；The second equipment in embodiment illustrated in fig. 5 indicates to use Family equipment；Transmission control unit indicates the first transmission controlled entity B1 in embodiment illustrated in fig. 5；PDCP in embodiment illustrated in fig. 5 Unit indicates PDCP entity.
For another example, it is based on the network architecture shown in Fig. 3, for being sent to the upstream data packet of server by user equipment Upstream data packet is sent to the second transmission of the user oriented equipment of base station by speech, the first transmission controlled entity A1 of user equipment Controlled entity B22, so that upstream data packet is sent to server by the second transmission controlled entity B22 of user oriented equipment.This In the case of one, the first equipment in embodiment illustrated in fig. 5 indicates user equipment；The second equipment in embodiment illustrated in fig. 5 indicates Base station；Transmission control unit indicates the first transmission controlled entity A1 in embodiment illustrated in fig. 5；PDCP is mono- in embodiment illustrated in fig. 5 Member indicates the PDCP entity of user equipment.
Based on the network architecture shown in Fig. 3, for being sent to the downlink data packet of user equipment by server, base station Second transmission controlled entity B22 of middle user oriented equipment receives the second transmission controlled entity B21 forwarding towards server Downlink data packet, and the downlink data packet is sent to the first of user equipment and transmits controlled entity A1, to realize downlink data The transmission of packet between the user equipment and the base station.
201, transmission control unit sends acquisition request to PDCP unit.
Wherein, which can be used for request caching instruction information.Caching instruction information is used to indicate described The quantity of the data packet of current cache in the corresponding spatial cache of PDCP unit.
For example, the transmission control unit is after detecting that user equipment and server establish connection, to the PDCP Unit sends the acquisition request, which is used to indicate the PDCP unit feedback caching instruction information.Transmission control in this way Unit processed can indicate information according to caching, it is determined whether send data packet to PDCP unit.
Optionally, the acquisition request is sent after the user equipment and server initially set up connection.
Optionally, the transmission control unit can send an acquisition request to PDCP unit, and PDCP unit is to transmission The primary caching instruction information of control unit feedback.
Optionally, the transmission control unit can to PDCP unit send an acquisition request, PDCP unit with Caching instruction information, the embodiment of the present invention pair are repeatedly fed back in the connection of family equipment and server to transmission control unit during establishing The number of PDCP unit feedback caching instruction information is without limitation.Transmission control unit to PDCP unit without repeatedly sending in this way Acquisition request also can repeatedly obtain caching instruction information, reduce the time for sending acquisition request, improve caching instruction letter The acquisition efficiency of breath.
Optionally, the transmission control unit can also indicate PDCP unit according to prefixed time interval by acquisition request Feedback caching instruction information, PDCP unit feed back caching instruction after receiving the acquisition request, according to prefixed time interval Information.
Unit 202, PDCP send caching instruction information to transmission control unit.
For example, the PDCP unit, after receiving the acquisition request, the PDCP unit counts corresponding caching The data packet number currently cached in space, and caching instruction information is determined according to the data packet number currently cached.
Optionally, the caching instruction information includes the data packet currently cached in the corresponding spatial cache of PDCP unit Quantity.Alternatively, the caching instruction information includes the data packet currently cached in the corresponding spatial cache of the PDCP unit Accounting of the quantity in the corresponding total spatial cache of PDCP unit.Alternatively, the caching instruction information includes the high instruction letter of caching Cease or cache low instruction information, wherein the high instruction information of caching or the low instruction information of caching can be by currently having cached Data packet number determines, or the high instruction information of caching or the low instruction information of caching can be the data by currently having cached Accounting of the packet quantity in the corresponding spatial cache of PDCP unit determines that it is not limited in the embodiment of the present invention.
It should be noted that the corresponding spatial cache of PDCP unit being related in embodiments of the present invention is that the PDCP is mono- The spatial cache that member is used alone.For example, the first equipment is that PDCP unit is assigned with individual spatial cache, the spatial cache is only It can be used by PDCP unit, i.e., the data packet currently cached only includes the data packet of PDCP unit caches.
Alternatively, first equipment further includes RLC unit；The corresponding spatial cache of the PDCP unit is that the PDCP is mono- The spatial cache that the first and described RLC unit is used in conjunction with.For example, the first equipment is that PDCP unit and RLC unit are assigned with one and delay Space is deposited, which can be used by PDCP unit and RLC unit, i.e., the data packet currently cached includes PDCP unit The data packet of data packet and the RLC caching of caching.
Optionally, the PDCP unit can refer to according to prefixed time interval to transmission control unit feedback caching Show information.Optionally, which, which can be, is set by transmission control unit and is notified PDCP unit, or by The setting of PDCP unit.
Correspondingly, the transmission control unit receives the caching instruction information that the PDCP unit is sent.
It include the data packet number currently cached for the caching instruction information in optional implementation one Situation, transmission control unit determine whether that the PDCP unit sends institute according to the size of the data packet number currently cached The data packet of the second equipment is stated, including：If the transmission control unit determines that the data packet number currently cached is greater than First threshold then stops the data packet that second equipment is sent to the PDCP unit；If the transmission control unit determines The data packet number currently cached is less than second threshold, it is determined that sends second equipment to the PDCP unit Data packet.As shown in Figure 5, however, it is determined that the accounting of the data packet currently cached is less than second threshold, thens follow the steps 203；If it is determined that the accounting of the data packet currently cached is greater than first threshold, 204 are thened follow the steps.
For optional implementation one, optionally, first threshold is greater than or equal to second threshold.For first Threshold value is equal to the case where second threshold, if the case where data packet currently cached is equal to first threshold, in the embodiment of the present invention In, transmission control unit can execute step 203, or can also execute step 204.
For optional implementation one, optionally, the PDCP unit can be first to the data currently cached Packet quantity is judged, feeds back caching instruction information to transmission control unit in the case where meeting certain condition determining.For example, The PDCP unit it is described currently the data packet number that has cached is greater than nine threshold values in the case where or described currently delayed For the data packet number deposited less than under the tenth threshold condition, feedback caching indicates information.Wherein the 9th threshold value is greater than or equal to the tenth Threshold value.In the case where being greater than the tenth threshold value for the 9th threshold value, determine currently the data packet number that has cached be more than or equal to Tenth threshold value and be less than or equal to nine threshold values the case where, PDCP unit can not send caching instruction information, reduce in this way PDCP unit and transmission control unit interaction times.
Optionally, the 9th threshold value employed in PDCP deterministic process in the embodiment of the present invention, can be single with transmission control First threshold numerically equal employed in first deterministic process, or can also be unequal.It is adopted in PDCP deterministic process Tenth threshold value, can be with second threshold numerically equal used by transmission control unit, or can also be unequal. The embodiment of the present invention to the size of this each threshold value without limitation.
For example, the 9th threshold value is 150, and the tenth threshold value is 100, if the data packet number of current cache is 80, by In 80 less than 100, then the caching instruction information that PDCP unit is fed back to transmission control unit is that the data packet of current cache is 80； If the data packet number of current cache is 130, since 130 are greater than 100, and 130 less than 150, then PDCP unit is not to transmission Control unit feedback caching instruction information；If the data packet number of current cache is 180, it is greater than 150 due to 180, then PDCP The caching instruction information that unit is fed back to transmission control unit is that the data packet of current cache is 180.It is mono- to reduce PDCP in this way Member and transmission control unit interaction times, and transmission control unit is also able to achieve and determines whether to send out according to caching instruction message Send the function of data packet.
It include that the corresponding caching of the PDCP unit is empty for caching instruction information in optional implementation two Between in currently accounting in the corresponding total spatial cache of PDCP unit of the data packet number that has cached the case where, transmission control is single Member indicates that information determines whether that the PDCP unit sends the data packet of second equipment according to the caching, specifically： If the transmission control unit determines that the accounting of the data packet currently cached is greater than third threshold value, stop to described PDCP unit sends the data packet of second equipment；If the transmission control unit determines the data packet currently cached Accounting less than the 4th threshold value, it is determined that the data packet of second equipment is sent to the PDCP unit.As shown in figure 5, if Determine that the accounting of the data packet currently cached less than the 4th threshold value, thens follow the steps 203；If it is determined that described currently delayed The accounting for the data packet deposited is greater than third threshold value, thens follow the steps 204.
Optionally, the determination and transmission of the caching instruction information of optional implementation two, can realize with reference to optional Caching instruction information is the specific descriptions of the data packet number currently cached in mode one, and details are not described herein.In addition, the two Difference be that the threshold value that the numerical value fed back is different, set is different, the embodiment of the present invention to the size of set threshold value not It limits.
It include the high instruction information of caching or the low finger of caching for caching instruction information in optional implementation three The case where showing information, caching high instruction information or the low instruction information of caching is the data packet number by currently having cached to determine 's.The high instruction information of caching indicates that the data packet number currently cached is greater than the 5th threshold value；It is described to cache low finger Show that information indicates the data packet number currently cached less than the 6th threshold value.Alternatively, the high instruction information of caching or caching are low Indicate that information is data packet number by currently having cached and determines in the accounting of the corresponding spatial cache of the PDCP entity, The high instruction information of caching indicates that the data packet number currently cached is greater than the 7th threshold value；It is described to cache low instruction letter Breath indicates the data packet number currently cached less than the 8th threshold value.As shown in figure 5, if caching instruction information is institute The low instruction information of caching is stated, thens follow the steps 203；If the caching instruction information is the high instruction information of the caching, execute Step 204.
For optional implementation three, the 5th threshold value is greater than or equal to the 6th threshold value.For the 5th threshold value is equal to The case where six threshold values, if the case where data packet currently cached is equal to five threshold values, in embodiments of the present invention, transmission control Unit processed can execute step 203, or can also execute step 204.
For optional implementation three, optionally, caching instruction information can be indicated by a bit, 1 indicates the high instruction information of caching, and 0 indicates to cache low instruction information；Alternatively, 0 indicates the high instruction information of caching, 1 indicates that caching is low Indicate information.
For optional implementation three, optionally, the PDCP unit can be indicated first to sent caching Information is judged, feeds back caching instruction information to transmission control unit in the case where meeting certain condition determining.Specifically： The PDCP unit can determine that the caching instruction information is the high instruction information of the caching or determines that the caching refers to In the case where showing that information is the low instruction information of the caching, feedback caching instruction information.6th threshold value is greater than for the 5th threshold value In the case where, it can determine that the data packet number currently cached is more than or equal to the 6th threshold value and to be less than or equal to the 5th threshold value The case where, caching instruction information can not be sent, reduces PDCP unit and transmission control unit interaction times in this way.
It for example, is the data packet number by currently having cached to cache high instruction information or cache low instruction information Illustrate for determining in the accounting in total spatial cache of PDCP unit, the 7th threshold value is 85%, the 8th threshold value is 65%, when being greater than seven threshold values, caching instruction message is 1, and when less than eight threshold values, caching instruction message is 0.
If the accounting of the data packet of current cache is 50%, since 50% less than 65%, then PDCP unit is controlled to transmission The caching instruction information of unit feedback processed is 0；If the accounting of the data packet of current cache is 75%, it is greater than due to 75% 65%, and 75% less than 85%, then PDCP unit does not feed back caching instruction information to transmission control unit；If the number of current cache Accounting according to packet is 90%, then since 90% is greater than 85%, then the caching that PDCP unit is fed back to transmission control unit indicates letter Breath is 1.Reduce PDCP unit and transmission control unit interaction times in this way, and transmission control unit is also able to achieve according to slow Instruction message is deposited to determine whether to send the function of data packet.
It should be noted that the 7th threshold value and the 8th threshold value in optional implementation three can with reference to the 5th threshold value and The implementation of 6th threshold value, details are not described herein.In addition the difference of the two is that set threshold value is different, and the present invention is implemented Example to the size of set threshold value without limitation.
203, if the caching instruction information instruction currently the data packet number that has cached be less than second threshold or it is current The accounting of the data packet of caching is to cache low instruction information, the then transmission less than the 4th threshold value or caching instruction information Control unit sends the data packet of second equipment to the PDCP unit.
For example, the data packet number currently cached is less than second threshold or the accounting of the data packet currently cached is small It is to cache low instruction information in the 4th threshold value or caching instruction information, indicates in the corresponding spatial cache of PDCP unit The data packet of current cache is less, and then indicates that the more data packet in the corresponding spatial cache of PDCP unit is set to user It is standby to transmit, therefore under this case, the transmission control unit can continue to send second equipment to PDCP unit Data packet, can reduce the corresponding spatial cache of PDCP entity in this way does not have data packet situation hair when wireless environment quality is preferable It is raw, and then can preferably adapt to wireless environment quality.
Optionally, during user equipment and server establish connection, the transmission control unit receives second and sets The reception window of standby feedback, and data packet is sent to the second equipment according to window is received.Window is received for indicating that second sets The quantity of the standby data packet that can receive.Transmission control unit will receive window and be determined as sending window in this way, and according to transmission Window, will need to be divided into the data packet that the second equipment is sent allows and not sent data packet and the number for not allowing transmission According to packet.Allow and not sent data packet is in and sends within window ranges, the data packet for not allowing to send is not sending window Within the scope of.In conjunction with the scheme of the embodiment of the present invention, after transmission control unit determines and caches low instruction information, transmission control The data packet that unit is sent is permission and not sent data packet.
Optionally, the confirmation message of the second equipment feedback, confirmation can also be received after the first equipment sends data packet Message is used to indicate the mark that the second equipment has received data packet.In this way, transmission control unit can according to receive window and Confirmation message further divides data packet, and the data packet divided further includes having sent and the data packet that has confirmed that and Transmission and unacknowledged data packet.It is understood that before not sending any data packet to the second equipment, the not will receive The confirmation message of two equipment feedback, and then there is no the data packets for having sent and having had confirmed that.
Optionally, transmission control unit can be specific according to the process for receiving window and determining message division data packet For：The transmission control unit of first equipment receives the reception window of the second equipment feedback, receives window and indicates the number in window According to the preset quantity of packet；And reception window is determined as to the transmission window of the first equipment；The transmission control unit, which determines, to be sent The data packet that window is included.
Wherein, if the first equipment does not also send data packet to the second equipment, the initial position for sending window is first Not sent data packet locations；The final position for sending window is to start counting from first data packet up to reaching preset quantity Data packet position.
With the transmission of data packet and the reception of confirmation message, the transmission control unit can move backward transmission window Mouthful, and the initial position for sending window is to send earliest according to the transmission sequence of data packet and do not receive the data packet of determining message Position；The final position for sending window is to start counting from initial position up to reaching pre- according to the transmission sequence of data packet If the position of the data packet of quantity.
Disappear if the data packet sent in window is sent to the second equipment and receive confirmation by transmission control unit Breath then will confirm that the data packet of message instruction is determined as the data packet for having sent and having had confirmed that.The data packet can send window In mouthful, such as the data packet sent before the data packet does not receive confirmation message also.Alternatively, the data packet can also sent Outside window, such as the data packet sent before the data packet receives confirmation message.
If the data packet sent in window is sent to the second equipment and does not receive confirmation by transmission control unit Message, then the data packet is to have sent and unacknowledged data packet.The data packet is being sent in window.
If transmission control unit does not send the data packet sent in window to the second equipment, which is fair Perhaps and not sent data packet.The data packet is being sent in window.
If a data packet is positioned at sending, window is outer and transmission control unit is not sent to the second equipment, the data Packet is the data packet for not allowing to send.The data packet is being sent outside window.
It is understood that if there is currently no allow and not sent data packet, the transmission control unit are not sent out Send data packet.
204, if the caching instruction information instruction currently the data packet number that has cached be greater than first threshold or it is current The accounting of the data packet of caching is greater than third threshold value or caching instruction information is the high instruction information of caching, the then transmission Control unit stops the data packet that second equipment is sent to the PDCP unit.
For example, the preceding data packet number cached is greater than first threshold or the accounting of the data packet currently cached is greater than Third threshold value or caching instruction information are the high instruction information of caching, in the corresponding spatial cache of expression PDCP unit when The data packet of preceding caching is more, indicates the little data packet in the corresponding spatial cache of PDCP unit to user device transmissions , therefore under this case, the transmission control unit can stop the data packet that second equipment is sent to PDCP unit, Generation the case where datagram overflow when wireless environment is second-rate of the corresponding spatial cache of PDCP entity can be reduced in this way, into And it can preferably adapt to wireless environment quality.
Optionally, after determining and caching high instruction information, transmission control unit stop the data packet sending be allow and Not sent data packet.
For example, please also refer to Fig. 6 (1) to Fig. 6 (3), for the embodiment of the invention provides a kind of transmission control is single Member sends the exemplary diagram of the method for data packet.As shown in fig. 6, the reception window that transmission control unit receives is 15 data Packet.The transmission control unit can once send one or more data packet, transmitted number-of-packet to PDCP unit Amount, this illustration is without limitation.
Wherein, the data packet having confirmed that indicates that the first equipment has been sent to the second equipment and has been received by the second equipment feedback Determination message data packet.The data packet sent indicates what the transmission control unit of the first equipment had been sent to PDCP unit Data packet, and partial data Bao Wei receives the data packet of the confirmation message of the second equipment feedback, the optional number sent It has been sent to the second equipment according to possible partial data packet is wrapped, it is also possible to which it is corresponding slow that partial data packet is also buffered in PDCP unit It deposits in space.Allow but not sent data packet indicates the data packet for allowing the first equipment to send to the second equipment, and first sets The data packet that transmission control unit in standby is not sent to PDCP unit；The data packet sent expression is not allowed not allow first to set The standby data packet sent to the second equipment.
In Fig. 6 (1), comprising the transmission data packet from No. 1 to No. 10 in currently transmitted window, and from No. 11 to 15 Number for allow send but not sent data packet.Data packet after more than 15 is the data packet for not allowing to send.If transmission control Unit processed, which determines, caches low instruction in PDCP unit, then the transmission control unit can continue to send No. 11 to PDCP unit extremely No. 15 all or part of data packets, such as send No. 11 to No. 14 data packets.
Further, in Fig. 6 (2), on the basis of Fig. 6 (1), transmission control unit receives the second equipment feedback No. 1 to No. 5 determination message will then send window and be moved to No. 6 to 20 number packets, and send and allow to send in window but not The data packet of transmission includes No. 15 to No. 20 data packets.If transmission control unit, which determines, caches low instruction in PDCP unit, The transmission control unit can continue to send No. 15 to No. 20 all or part of data packets to PDCP unit, such as send No. 15 data packets.
Further, in Fig. 6 (3), on the basis of Fig. 6 (2), transmission control unit receives the second equipment feedback again No. 6 determination message, then will send window and be moved to No. 7 to 21 number packets, and send and allow to send but do not send out in window The data packet sent includes No. 16 to No. 21 data packets.If transmission control unit, which determines, caches high instruction, institute in PDCP unit State the data packet that transmission control unit stops sending No. 16 to No. 21 in currently transmitted window to PDCP unit.It is understood that Be, if subsequent transmission control unit, which receives, caches low instruction in PDCP unit, the transmission control unit can continue to PDCP unit sends No. 16 to No. 21 data packets.
Fig. 5 is returned to, step 205, receives target data for the first time from second equipment in the transmission control unit In the case where wrapping unreceived notification message, then the transmission control unit retransmits the target data to the PDCP unit Packet.
Step 205 is optional step.For example, receiving target data from second equipment in the transmission control unit Unreceived notification message is wrapped, and is transmission in the case where receiving for the first time about the unreceived notification message of target packet Control unit retransmits the target packet immediately, and wherein target packet is to send in window to have sent and unacknowledged multiple Any one in data packet.Optionally, the caching that transmission control unit can be fed back according to PDCP unit indicates information to send out Data packet is sent, so that data packet will not sequentially change in transmission, therefore the second equipment can carry out received data packet in sequence； If transmission control unit once receives the unreceived notification message of target packet, re-transmission can be executed.Compared to existing side Case, using existing Transmission Control Protocol in transmission of data packets, the transmission sequence of data packet can change, therefore use The unreceived notification message of same data packet three times is received, the scheme of the target packet, the embodiment of the present invention can be just retransmitted Scheme re-transmission do not receive the more efficient of data packet.
For example, please also refer to Fig. 7 (1) to Fig. 7 (3), for the embodiment of the invention provides another kind transmission controls Unit sends the exemplary diagram of the method for data packet.It is set as sending window as shown in fig. 7, transmission control unit will receive window, And sending window is 15 data packets.
In Fig. 7 (1), No. 1, No. 2, No. 3,5 number packets of the transmission of the second equipment are received in transmission control unit Confirmation message and the 4 unreceived notification messages of number packet, and the notification message is to notify for the first time, in this case, The current window that sends includes the data packet from No. 4 to No. 18, wherein No. 5 are the data for having sent and having received confirmation message Packet, 6 to No. 14 data packets are the data packet for having sent and not received confirmation and No. 15 to No. 18 data packets are to allow to send out It send but not sent data packet.
With further reference to Fig. 7 (2), the transmission control unit retransmits 4 number packets immediately.It should be noted that transmission In the case that control unit can cache low instruction or caching height instruction in receiving PDCP unit, 4 numbers are retransmitted immediately According to packet.Disappear it is understood that the transmission control unit does not receive about the unreceived notice of No. 5 to No. 14 data packets Breath, there is no need to retransmit No. 5 to No. 14 data packets.
Further, in Fig. 7 (3), on the basis of Fig. 7 (2), transmission control unit is retransmitted after 4 number packets, if Transmission control unit, which receives, caches low instruction in PDCP unit, then the transmission control unit can continue to send out to PDCP unit No. 15 to No. 18 data packets are sent, for example, sending 15 number packets.
And in the embodiment of the present invention, the transmission control unit of the first equipment can be determined whether according to caching instruction information PDCP unit sends the data packet of the second equipment.If the data packet number currently cached in the corresponding spatial cache of PDCP entity Less, transmission control unit, which determines, to be continued to send data packet to PDCP entity；If current in the corresponding spatial cache of PDCP entity The data packet number cached is more, and transmission control unit, which determines, to be stopped sending data packet to PDCP entity.Therefore, transmission control Unit according to the data packet in the corresponding spatial cache of PDCP unit how much, it is determined whether to PDCP unit transmit data packet, can There is no data packet when wireless environment quality is preferable and in wireless environment quality to reduce the corresponding spatial cache of PDCP unit Occur the case where datagram overflow when poor, and then can preferably adapt to wireless environment quality, improves to wireless transmission band Wide utilization rate.
Fig. 8 shows a kind of functional schematic of the first equipment involved in above-described embodiment.As shown in figure 8, this One equipment 800 may include transmission control unit 801 and PDCP unit 802.
The PDCP unit 802 is used to send caching instruction information, the caching instruction to the transmission control unit 801 Information is used to indicate the data packet number of current cache in the corresponding spatial cache of the PDCP unit 802；
The transmission control unit 801 is used to receive the caching instruction information from the PDCP unit 802；
The transmission control unit 801 is used to indicate information according to the caching, it is determined whether to the PDCP unit 802 Send the data packet of second equipment.
In an alternative embodiment, the transmission control unit 801 is also used to send to the PDCP unit 802 and obtain Request is taken, to obtain the caching instruction information.
In an alternative embodiment, the caching instruction information includes that the corresponding caching of the PDCP unit 802 is empty Between in the current data packet number that has cached；
Information is being indicated according to the caching, it is determined whether the number of second equipment is sent to the PDCP unit 802 According to packet aspect, the transmission control unit 801 is specifically used for：It has currently been cached if the determination of transmission control unit 801 is described Data packet number be greater than first threshold, then stop the data packet that second equipment is sent to the PDCP unit 802；If institute It states transmission control unit 801 and determines that the data packet number currently cached is less than second threshold, it is determined that the PDCP Unit 802 sends the data packet of second equipment.
In an alternative embodiment, the caching instruction information includes that the corresponding caching of the PDCP unit 802 is empty Between in the accounting of data packet that has currently cached；
Information is being indicated according to the caching, it is determined whether the number of second equipment is sent to the PDCP unit 802 According to packet aspect, the transmission control unit 801 is specifically used for：It has currently been cached if the determination of transmission control unit 801 is described Data packet accounting be greater than third threshold value, then stop the data packet that second equipment is sent to the PDCP unit 802；If The transmission control unit 801 determines the accounting of the data packet currently cached less than the 4th threshold value, it is determined that described PDCP unit 802 sends the data packet of second equipment.
In an alternative embodiment, the caching instruction information includes the high instruction information of caching or the low instruction letter of caching Breath；
Information is being indicated according to the caching, it is determined whether the number of second equipment is sent to the PDCP unit 802 According to packet aspect, the transmission control unit 801 is specifically used for：If the caching instruction information is the high instruction information of the caching, Then stop the data packet that second equipment is sent to the PDCP unit 802；If the caching instruction information is the caching Low instruction information, it is determined that the data packet of second equipment is sent to the PDCP unit 802；Wherein, the caching height refers to Show that information indicates that the data packet number currently cached is greater than the 5th threshold value；Described cache is worked as described in low instruction information expression The preceding data packet number cached is less than the 6th threshold value.
In an alternative embodiment, the transmission control unit 801 is specifically used for determining whether that the PDCP is mono- Member 802 sends the data packet for allowing and not sending to second equipment.
In an alternative embodiment, if first equipment 800 is user equipment, second equipment is base station, Then the transmission control unit 801 is also used to receive the transmission control instructions information that second equipment is sent, the transmission control It is two connections that system instruction information, which is used to indicate the base station for the connection truncation between the user equipment and server,；
Wherein, two connections are respectively between the user equipment and the base station in the transmission control unit 801 participate in the connection under control and the transmission control protocol TCP connection between the base station and the server.
In an alternative embodiment, first equipment 800 is base station, and second equipment is user equipment.
In an alternative embodiment, the corresponding spatial cache of the PDCP unit 802 is that the PDCP unit 802 is only From the spatial cache used.
In an alternative embodiment, first equipment 800 further includes RLC unit；The PDCP unit 802 is corresponding Spatial cache be the spatial cache that is used in conjunction with of the PDCP unit 802 and the RLC unit.
It should be understood that the specific implementation for the functional block that the first equipment 800 about Fig. 8 includes and corresponding beneficial Effect can refer to previous embodiment (for example, Fig. 5), not repeat here.
The first equipment 800 in embodiment illustrated in fig. 8 can be realized with the first equipment 900 shown in Fig. 9.As shown in figure 9, For the embodiment of the invention provides the structural schematic diagram of another first equipment, the first equipment 900 shown in Fig. 9 includes：Processing Device 901 and transceiver 902, the transceiver 902 is for supporting the first equipment 900 and the second equipment involved in above-described embodiment Between data transmission.Processor 901 and transceiver 902 communicate to connect, such as are connected by bus.First equipment 900 It can also include memory 903.Memory 903 is used to store the program code executed for the first equipment 900 and data, processor 901 for executing the application code stored in memory 903, to realize that any embodiment shown in Fig. 1 to Fig. 7 (3) provides The first equipment movement.
It should be noted that the first equipment may include one or more processor in practical application, first equipment 800 structure does not constitute the restriction to the embodiment of the present application.
Processor 901 can be central processing unit (central processing unit, CPU), network processing unit (network processor, NP), hardware chip or any combination thereof.Above-mentioned hardware chip can be specific integrated circuit (application-specific integrated circuit, ASIC), programmable logic device (programmable Logic device, PLD) or combinations thereof.Above-mentioned PLD can be Complex Programmable Logic Devices (complex Programmable logic device, CPLD), field programmable gate array (field-programmable gate Array, FPGA), Universal Array Logic (generic array logic, GAL) or any combination thereof.
Memory 903 may include volatile memory (volatile memory), such as random access memory (random access memory, RAM)；Memory 903 also may include nonvolatile memory (non-volatile Memory), such as read-only memory (read-only memory, ROM), flash memory (flash memory), hard disk (hard disk drive, HDD) or solid state hard disk (solid-state drive, SSD)；Memory 903 can also include upper State the combination of the memory of type.
A kind of computer storage medium is additionally provided in embodiments of the present invention, for being stored as used in above-mentioned first equipment Computer software instructions, it includes for executing in above-described embodiment as program designed by the first equipment.The storage medium Including but not limited to flash memory, hard disk, solid state hard disk.
A kind of computer program product is additionally provided in embodiments of the present invention, which is run by calculating equipment When, it is data pack transmission method designed by the first equipment in above-described embodiment.
The description and claims of this application and term " first ", " second ", " third " and " in the attached drawing Four " etc. are not use to describe a particular order for distinguishing different objects.In addition, term " includes " and " having " and it Any deformation, it is intended that cover and non-exclusive include.Such as it contains the process, method of a series of steps or units, be System, product or equipment are not limited to listed step or unit, but optionally further comprising the step of not listing or list Member, or optionally further comprising other step or units intrinsic for these process, methods, product or equipment.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, the process Relevant hardware can be instructed to complete by computer program, which can be stored in computer-readable storage medium, should Program is when being executed, it may include such as the process of above-mentioned each method embodiment.And storage medium above-mentioned includes：ROM is deposited at random Store up the medium of the various program storage codes such as memory body RAM, magnetic or disk.
Although the application is described in conjunction with each embodiment herein, however, implementing the application claimed In the process, those skilled in the art are by checking the attached drawing, disclosure and the appended claims, it will be appreciated that and it is real Other variations of the existing open embodiment.In the claims, " comprising " (comprising) word is not excluded for other compositions Part or step, "a" or "an" are not excluded for multiple situations.Claim may be implemented in single processor or other units In several functions enumerating.Mutually different has been recited in mutually different dependent certain measures it is not intended that these measures It cannot combine and generate good effect.
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application Attached drawing, technical solutions in the embodiments of the present application are described.The description and claims of this application and the attached drawing In term " first ", " second ", " third " and " the 4th " etc. be for distinguishing different objects, rather than it is specific suitable for describing Sequence.In addition, term " includes " and " having " and their any deformations, it is intended that cover and non-exclusive include.Such as comprising The process, method, system, product or equipment of a series of steps or units are not limited to listed step or unit, and It is optionally further comprising the step of not listing or unit, or optionally further comprising for these process, methods, product or equipment Intrinsic other step or units.
It will be understood by those skilled in the art that embodiments herein can provide as method, apparatus (equipment) or computer journey Sequence product.Therefore, complete hardware embodiment, complete software embodiment or combining software and hardware aspects can be used in the application The form of embodiment.Moreover, it wherein includes the calculating of computer usable program code that the application, which can be used in one or more, The computer program implemented in machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.Computer program is stored/distributed in suitable medium, is provided together with other hardware or as the one of hardware Part can also use other distribution forms, such as pass through the wired or wireless telecommunication system of Internet or other.
The application be referring to the embodiment of the present application method, apparatus (equipment) and computer program product flow chart with/ Or block diagram describes.It should be understood that each process that can be realized by computer program instructions in flowchart and/or the block diagram and/ Or the combination of the process and/or box in box and flowchart and/or the block diagram.It can provide these computer program instructions To general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices processor to generate one A machine so that by the instruction that the processor of computer or other programmable data processing devices executes generate for realizing The device for the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.
Although the application is described in conjunction with specific features and embodiment, it is clear that, do not departing from this Shen In the case where spirit and scope please, it can be carry out various modifications and is combined.Correspondingly, the specification and drawings are only institute The exemplary illustration for the application that attached claim is defined, and be considered as covered within the scope of the application any and all and repair Change, change, combining or equivalent.Obviously, those skilled in the art the application can be carried out various modification and variations without It is detached from spirit and scope.If in this way, these modifications and variations of the application belong to the claim of this application and its Within the scope of equivalent technologies, then the application is also intended to include these modifications and variations.

Claims (20)

1. a kind of first equipment, which is characterized in that first equipment includes transmission control unit, Packet Data Convergence Protocol PDCP unit, wherein
The PDCP unit is used to send caching instruction information to the transmission control unit, and the caching instruction information is for referring to Show the data packet number of current cache in the corresponding spatial cache of the PDCP unit；
The transmission control unit, which is used to receive the caching from the PDCP unit, indicates information；
The transmission control unit is used to indicate information according to the caching, it is determined whether sends second to the PDCP unit and sets Standby data packet.
2. equipment according to claim 1, which is characterized in that
The transmission control unit is also used to send acquisition request to the PDCP unit, to obtain the caching instruction information.
3. equipment according to claim 1 or 2, which is characterized in that the caching instruction information includes the PDCP unit The data packet number currently cached in corresponding spatial cache；
Information is being indicated according to the caching, it is determined whether the data packet side of second equipment is sent to the PDCP unit Face, the transmission control unit are specifically used for：
If the transmission control unit determines that the data packet number currently cached is greater than first threshold, stop to described PDCP unit sends the data packet of second equipment；
If the transmission control unit determines that the currently data packet number that has cached is less than second threshold, it is determined that described PDCP unit sends the data packet of second equipment.
4. equipment according to claim 1 or 2, which is characterized in that the caching instruction information includes the PDCP unit The accounting of the data packet currently cached in corresponding spatial cache；
Information is being indicated according to the caching, it is determined whether the data packet side of second equipment is sent to the PDCP unit Face, the transmission control unit are specifically used for：
If the transmission control unit determines that the accounting of the data packet currently cached is greater than third threshold value, stop to institute State the data packet that PDCP unit sends second equipment；
If the transmission control unit determines the accounting of the data packet currently cached less than the 4th threshold value, it is determined that institute State the data packet that PDCP unit sends second equipment.
5. equipment according to claim 1 or 2, which is characterized in that the caching instruction information includes the high instruction letter of caching Cease or cache low instruction information；
Information is being indicated according to the caching, it is determined whether the data packet side of second equipment is sent to the PDCP unit Face, the transmission control unit are specifically used for：
If the caching instruction information is the high instruction information of the caching, stop setting to PDCP unit transmission described second Standby data packet；
If the caching instruction information is the low instruction information of the caching, it is determined that send described second to the PDCP unit and set Standby data packet；
Wherein, the high instruction information of the caching indicates that the data packet number currently cached is greater than the 5th threshold value；It is described slow Depositing low instruction information indicates the data packet number currently cached less than the 6th threshold value.
6. equipment according to claim 1, which is characterized in that the transmission control unit is specifically used for determining whether institute It states PDCP unit and sends the data packet for allowing and not sending to second equipment.
7. equipment according to claim 1-6, which is characterized in that if first equipment is user equipment, institute Stating the second equipment is base station, then the transmission control unit is also used to receive the transmission control instructions letter that second equipment is sent Breath, the transmission control instructions information are used to indicate the base station and cut a connection between the user equipment and server Break and is connected for two；
Wherein, two connections are respectively and participate in controlling in the transmission control unit between the user equipment and the base station Transmission control protocol TCP connection between connection and the base station and the server under system.
8. equipment according to claim 1-6, which is characterized in that first equipment be base station, described second Equipment is user equipment.
9. equipment according to claim 1-8, which is characterized in that the corresponding spatial cache of the PDCP unit is The spatial cache that the PDCP unit is used alone.
10. equipment according to claim 1-8, which is characterized in that first equipment further includes Radio Link Layer control protocol RLC unit；The corresponding spatial cache of the PDCP unit is that the PDCP unit and the RLC unit make jointly Spatial cache.
11. a kind of data pack transmission method, which is characterized in that the method includes：
First equipment obtains caching instruction information, and the caching instruction information is used to indicate the PDCP unit in first equipment The data packet number of current cache in corresponding spatial cache；
First equipment indicates information according to the caching, it is determined whether the data of the second equipment are sent to the PDCP unit Packet.
12. according to the method for claim 11, which is characterized in that before first equipment obtains caching instruction information, Further include：
First equipment sends acquisition request to the PDCP unit, to obtain the caching instruction information.
13. method according to claim 11 or 12, which is characterized in that the caching instruction information includes the PDCP mono- The data packet number currently cached in the corresponding spatial cache of member；
First equipment indicates information according to the caching, it is determined whether sends second equipment to the PDCP unit Data packet, including：
If first equipment determines that the data packet number currently cached is greater than first threshold, stop to the PDCP Unit sends the data packet of second equipment；
If first equipment determines that the data packet number currently cached is less than second threshold, it is determined that the PDCP Unit sends the data packet of second equipment.
14. method according to claim 11 or 12, which is characterized in that the caching instruction information includes the PDCP mono- The accounting of the data packet currently cached in the corresponding spatial cache of member；
First equipment indicates information according to the caching, it is determined whether sends second equipment to the PDCP unit Data packet, including：
If first equipment determines that the accounting of the data packet currently cached is greater than third threshold value, stop to described PDCP unit sends the data packet of second equipment；
If first equipment determines the accounting of data packet currently cached less than the 4th threshold value, it is determined that described PDCP unit sends the data packet of second equipment.
15. method according to claim 11 or 12, which is characterized in that the caching instruction information includes the high instruction of caching Information or the low instruction information of caching；
First equipment indicates information according to the caching, it is determined whether sends second equipment to the PDCP unit Data packet, including：
If the caching instruction information is the high instruction information of the caching, stop setting to PDCP unit transmission described second Standby data packet；
If the caching instruction information is the low instruction information of the caching, it is determined that send described second to the PDCP unit and set Standby data packet；
Wherein, the high instruction information of the caching indicates that the data packet number currently cached is greater than the 5th threshold value；It is described slow Depositing low instruction information indicates the data packet number currently cached less than the 6th threshold value.
16. according to the method for claim 11, which is characterized in that first equipment indicates information according to the caching, Determine whether that the PDCP unit sends the data packet of second equipment, including：
First equipment indicates information according to the caching, it is determined whether sending to the PDCP unit allows and not to described The data packet that second equipment is sent.
17. the described in any item methods of 1-16 according to claim 1, which is characterized in that if first equipment is user equipment, Second equipment be base station, then the method also includes：
First equipment receives the transmission control instructions information that second equipment is sent, and the transmission control instructions information is used It is two connections in indicating the base station for the connection truncation between the user equipment and server；
Wherein, two connections are respectively and participate under control between the user equipment and the base station in first equipment Connection and the base station and the server between transmission control protocol TCP connection.
18. the described in any item methods of 1-16 according to claim 1, which is characterized in that first equipment is base station, described the Two equipment are user equipment.
19. the described in any item methods of 1-18 according to claim 1, which is characterized in that the corresponding caching of the PDCP unit is empty Between be spatial cache that the PDCP unit is used alone.
20. the described in any item methods of 1-18 according to claim 1, which is characterized in that first equipment further includes radio chains Road floor control protocol RLC unit；The corresponding spatial cache of the PDCP unit is that the PDCP unit and the RLC unit are common The spatial cache used.
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