CN108370607A - Digital units, radio-cell, base station and data transmission method - Google Patents

Digital units, radio-cell, base station and data transmission method Download PDF

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Publication number
CN108370607A
CN108370607A CN201680071225.3A CN201680071225A CN108370607A CN 108370607 A CN108370607 A CN 108370607A CN 201680071225 A CN201680071225 A CN 201680071225A CN 108370607 A CN108370607 A CN 108370607A
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data packet
functional module
pdcp
data
sent
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何建平
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Embodiments herein provides digital units, radio-cell, base station and data transmission method, is related to the communications field, reduces the demand of the defeated bandwidth of the data mutual transmission transmitted between digital units and radio-cell.Digital units include：PDCP function modules and RRC function modules；RRC function modules send the first data packet for obtaining the first data packet, and to PDCP function modules；PDCP function modules are used to receive the first data packet of RRC function modules transmission, and encapsulate the first data packet according to PDCP, to generate the first PDCP data packets, and send the first PDCP data packets to the first RU.

Description

Digital units, radio-cell, base station and data transmission method Technical field
This application involves the communications field more particularly to digital units, radio-cell, base station and data transmission methods.
Background technique
Usually using the framework of distributed base station in existing Radio Access Network.As shown in Figure 1, general typical distributed base station includes three RU (Radio Unit, radio-cell) and a DU (Didital Unit, digital units).Interface between DU and each RU uses CPRI (Common Public Radio Interface, common public radio interface) agreement, data by CPRI transmission are the higher baseband I/Q of delay requirement (In-phase/Quadrature, inphase quadrature) data.
LTE (Long Term Evolution, long term evolution) system usually supports 20MHz (megahertz) bandwidth, in order to increase process performance, would generally configure multiple antennas in LTE system.According to the layout of existing DU and RU, with being continuously increased for antenna number, the baseband I/Q data data volume transmitted between DU and RU can be multiplied.And it is based on baseband I/higher characteristic of Q data delay requirement, in the case where baseband I/Q data data volume is multiplied, demand of the baseband I/Q data to transmission bandwidth can be very big.
By taking 2T2R (double hairs are double to be received), bandwidth 20MHz, sample rate are 30.72M/s (million/second) as an example, if baseband I/Q data signal bit wide is 15bit (position), the transmission bandwidth that CPRI interface needs in single cell are as follows:
Transmission bandwidth=(I signal bit wide+Q signal bit wide) × sampling rate × antenna number × 10/8 × 16/15
Bit × 30.72M/s × 2 × 10/8 × 16/15=(15+15)
=2.4576Gbps
In formula, 10/8 is coding bring optical port redundancy, and 16/15 is control word bring redundancy.
Correspondingly, antenna amount it is more (such as: 4T4R (four hair four receive), 8T8R (eight Hair eight is received)) application scenarios in, the numerical value of required transmission bandwidth can be multiplied on the basis of 2.4576Gbps, and the numerical value of required transmission bandwidth can be very big.
Summary of the invention
Embodiments herein provides digital units, radio-cell, base station and data transmission method, can reduce the demand of the defeated bandwidth of the data mutual transmission transmitted between digital units and radio-cell.
In order to achieve the above objectives, embodiments herein adopts the following technical scheme that
In a first aspect, the embodiment of the present application provides a kind of digital units DU, which includes packet data compression protocol PDCP functional module and radio resource control RRC functional module.
Specifically, the function that each unit module provided by the embodiments of the present application is realized is specific as follows:
Above-mentioned RRC functional module sends the first data packet for obtaining the first data packet for including at least payload, and to PDCP functional module.
Above-mentioned PDCP functional module, the first data packet sent for receiving above-mentioned RRC functional module encapsulate received first data packet according to PDCP, to generate the first PDCP data packet, and for sending the first PDCP data packet to the first RU.
In down direction, the data transmitted between DU and the first RU in the embodiment of the present application are the first PDCP data packet, first PDCP data packet is that PDCP functional module is packaged to obtain to received first data packet, first PDCP data packet includes the packet header PDCP and payload, compared with baseband I/Q data, requirement of the first PDCP data packet to time delay is relatively low, in this case, demand of the first PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
Further, above-mentioned PDCP functional module is specifically used for sending the first PDCP data packet to the first RU by Ethernet.
The first PDCP data packet transmitted between DU and the first RU in the embodiment of the present application can be transmitted using common Ethernet, Ethernet is mature network of existing stage, in this way, directly being connected by Ethernet between DU and the first RU, dispose simple and convenient.In the existing stage, it is laid out that cost is relatively low using Ethernet.
Specifically, above-mentioned RRC functional module, specifically for receiving equipment of the core network transmission Downlink data packet is handled downlink data packet according to RRC agreement, generates the first data packet.
In addition, above-mentioned RRC functional module and above-mentioned PDCP functional module send signaling according to the regulation of corresponding existing protocol and receive signaling in control plane.
Second aspect, the embodiment of the present application provide a kind of radio-cell RU, which includes wireless spread-spectrum technology RLC functional module, media access control MAC functional module, physics PHY functional module and intermediate frequency IRF functional module.
Specifically, the function that each unit module provided by the embodiments of the present application is realized is specific as follows:
Above-mentioned RLC functional module, the first PDCP data packet sent for receiving digital units DU, and for encapsulating the first PDCP data packet according to rlc protocol, to generate the second data packet, and for sending the second data packet to above-mentioned MAC functional module.
Above-mentioned MAC functional module, the second data packet sent for receiving above-mentioned RLC functional module encapsulate the second data packet according to MAC protocol, to generate third data packet, and for sending third data packet to above-mentioned PHY functional module；
Third data packet is converted to the first data flow according to PHY agreement, and sends the first data flow to above-mentioned IRF functional module by above-mentioned PHY functional module, the third data packet sent for receiving above-mentioned MAC functional module；
Above-mentioned IRF functional module, the first data flow sent for receiving above-mentioned PHY functional module, and the first data flow is handled according to IRF agreement, data flow to be sent is generated, and for sending data flow to be sent.
The embodiment of the present application is corresponding with a upper embodiment, the data transmitted between DU and the first RU in the embodiment of the present application are also the first PDCP data packet for including the packet header PDCP and payload, compared with baseband I/Q data, requirement of the first PDCP data packet to time delay is relatively low, in this case, demand of the first PDCP data packet to transmission bandwidth is relatively low, and is conducive to the data volume for reducing interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
Further, above-mentioned RLC functional module, specifically for receiving the first PDCP data packet that DU is sent by Ethernet.
Ethernet is mature network of existing stage, is disposed simple and convenient.In existing rank Section, is laid out that cost is relatively low using Ethernet.
In addition, above-mentioned RLC functional module, MAC functional module, PHY functional module and IRF functional module send signaling according to the regulation of corresponding existing protocol and receive signaling in control plane.
The third aspect, another embodiment of the application provide a kind of digital units DU, which includes packet data compression protocol PDCP functional module and radio resource control RRC functional module.
Specifically, the function that each unit module provided by the embodiments of the present application is realized is specific as follows:
Above-mentioned PDCP functional module, the 2nd PDCP data packet sent for receiving the first RU, and for decapsulating the 2nd PDCP data packet, to obtain the 4th data packet, 4th data packet includes at least payload, and for sending the 4th data packet to above-mentioned RRC functional module.
Above-mentioned RRC functional module, the 4th data packet sent for receiving above-mentioned PDCP functional module, is handled the 4th data packet according to RRC agreement, to generate upstream data packet, and sends upstream data packet to equipment of the core network.
In up direction, the data transmitted between DU and the first RU in the embodiment of the present application are the 2nd PDCP data packet, compared with baseband I/Q data, requirement of the 2nd PDCP data packet to time delay is relatively low, in this case, demand of the 2nd PDCP data packet to transmission bandwidth is relatively low, and is conducive to the data volume for reducing interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
Further, above-mentioned PDCP functional module, specifically for receiving the 2nd PDCP data packet that the first RU is sent by Ethernet.
Ethernet is mature network of existing stage, is disposed simple and convenient.In the existing stage, it is laid out that cost is relatively low using Ethernet.
Fourth aspect, another embodiment of the application provide a kind of radio-cell RU, which includes: wireless spread-spectrum technology RLC functional module, media access control MAC functional module, physics PHY functional module and intermediate frequency IRF functional module.
Specifically, the function that each unit module provided by the embodiments of the present application is realized is specific as follows:
Above-mentioned IRF functional module, for obtaining customer traffic, according to IRF agreement to institute It states customer traffic to be handled, to generate the second data flow, and sends the second data flow to above-mentioned PHY functional module.
Above-mentioned PHY functional module, the second data flow sent for receiving above-mentioned IRF functional module, and second stream compression is changed to by the 5th data packet according to PHY agreement, and for sending the 5th data packet to above-mentioned MAC functional module.
Above-mentioned MAC functional module, the 5th data packet sent for receiving above-mentioned PHY functional module, and the 5th data packet is decapsulated according to MAC protocol, to obtain the 6th data packet, and for sending the 6th data packet to above-mentioned RLC functional module.
Above-mentioned RLC functional module, the 6th data packet sent for receiving above-mentioned MAC functional module, and the 6th data packet is decapsulated according to rlc protocol, to obtain the 2nd PDCP data packet, and with to digital units DU the 2nd PDCP data packet of transmission.
It is corresponding with a upper embodiment, the data transmitted between DU and the first RU in the embodiment of the present application are the 2nd PDCP data packet, compared with baseband I/Q data, requirement of the 2nd PDCP data packet to time delay is relatively low, in this case, demand of the 2nd PDCP data packet to transmission bandwidth is relatively low, and is conducive to the data volume for reducing interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
Further, above-mentioned RLC functional module is specifically used for sending the 2nd PDCP data packet to digital units DU by Ethernet.
Ethernet is mature network of existing stage, is disposed simple and convenient.In the existing stage, it is laid out that cost is relatively low using Ethernet.
5th aspect, the embodiment of the present application provides a kind of base station, including the digital units DU as described in above-mentioned any one and the radio-cell RU as described in above-mentioned any one, wherein is connected between DU and each RU by Ethernet.
The technical effect of base station provided by the embodiments of the present application may refer to the technical effect of RU in the technical effect of DU and above-described embodiment in above-described embodiment, and details are not described herein again.
6th aspect, the embodiment of the present application provide a kind of data transmission method, and data transmission method is applied to base station as described above, and base station includes digital units DU and at least one radio-cell RU.
Specifically, data transmission method provided by the embodiments of the present application are as follows: got in DU After the first data packet of payload, DU encapsulates its first data packet got according to packet data compression protocol PDCP, generates the first PDCP data packet, then, DU sends the first PDCP data packet to the first RU, wherein the first RU is any one at least one RU.
As can be seen that the DU in the embodiment of the present application, after getting the first data packet, DU is packaged first data packet, to obtain the first PDCP data packet, DU sends the first PDCP data packet after getting the first PDCP data packet, to the first RU.Compared with baseband I/Q data, requirement of the first PDCP data packet to time delay is relatively low, and in this case, demand of the first PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
Specifically, DU can be with to the method that the first RU sends the first PDCP data packet are as follows: DU sends the first PDCP data packet to the first RU by Ethernet.
The first PDCP data packet that DU in the embodiment of the present application is sent to RU can be transmitted by common Ethernet, and Ethernet is that mature network of existing stage is disposed simple and convenient in this way, directly being connected by Ethernet between DU and RU.In the existing stage, it is laid out that cost is relatively low using Ethernet.
7th aspect, the embodiment of the present application provide a kind of data transmission method, and data transmission method is applied to the base station such as above-described embodiment, and base station includes digital units DU and at least one radio-cell RU.
For the first RU at least one RU, data transmission method are as follows: the first RU is after the first packet data compression protocol PDCP data packet for receiving DU transmission, first RU is handled the first PDCP data packet according to preset protocol, data flow to be sent is generated, and data flow to be sent is sent.
Corresponding with a upper embodiment, the first RU in the embodiment of the present application receives the first PDCP data packet that DU is sent, i.e., the data transmitted between DU and the first RU in the embodiment of the present application are the first PDCP data packet.Compared with baseband I/Q data, requirement of the first PDCP data packet to time delay is relatively low, and in this case, demand of the first PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
Specifically, the method that the first RU receives the first PDCP data packet that DU is sent can be with are as follows: the first RU receives the first PDCP data packet of DU transmission by Ethernet.
Similarly, the first PDCP data packet transmitted between DU and the first RU in the embodiment of the present application can be transmitted by common Ethernet, and Ethernet is mature network of existing stage, in this way, it is directly connected, is disposed simple and convenient by Ethernet between DU and the first RU.In the existing stage, it is laid out that cost is relatively low using Ethernet.
Specifically, the first RU is handled the first PDCP data packet according to preset protocol, the method for generating data flow to be sent are as follows: firstly, the first RU is packaged the first PDCP data packet according to wireless spread-spectrum technology rlc protocol, generate the second data packet；Secondly, the first RU is packaged the second data packet according to media access control MAC protocol, third data packet is generated；Then, third data packet is converted to the first data flow according to physics PHY agreement by the first RU；Finally, the first RU is handled the first data flow according to intermediate frequency IRF agreement, data flow to be sent is generated.
It is easily understood that, it is actually the flow direction according to data packet that first RU, which carries out the method that processing generates data flow to be sent to the first PDCP data packet according to preset protocol, data packet is carried out using each protocol layer respective treated, and treatment process is identical as existing protocol, is no longer described in detail herein.
Eighth aspect, the embodiment of the present application provide a kind of data transmission method, and data transmission method is applied to the base station such as above-described embodiment, and base station includes digital units DU and at least one radio-cell RU.
Specifically, data transmission method provided by the embodiments of the present application are as follows: DU is after receiving the second packet data compression protocol PDCP data packet that the first RU (at least one RU any one) is sent, according to PDCP, decapsulate the 2nd PDCP data packet, the 4th data packet is obtained, the 4th data packet includes at least payload；Then, DU is handled the 4th data packet according to radio resource control RRC agreement, generates upstream data packet, finally, DU sends upstream data packet to equipment of the core network.
It is easily understood that the data transmitted between DU and RU in the embodiment of the present application are upstream data.It is the 2nd PDCP data packet that the first RU is sent that DU in the embodiment of the present application is received, i.e., the data transmitted between DU and the first RU in the embodiment of the present application are 2nd PDCP data packet.Compared with baseband I/Q data, requirement of the 2nd PDCP data packet to time delay is relatively low, and in this case, demand of the 2nd PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
Specifically, the method that DU receives the 2nd PDCP data packet that the first RU is sent can be with are as follows: DU receives the 2nd PDCP data packet of the first RU transmission by Ethernet.
The 2nd PDCP data packet transmitted between DU and the first RU in the embodiment of the present application can be transmitted by common Ethernet, Ethernet is mature network of existing stage, in this way, directly being connected by Ethernet between DU and the first RU, dispose simple and convenient.In the existing stage, it is laid out that cost is relatively low using Ethernet.
9th aspect, the embodiment of the present application provide a kind of data transmission method, and data transmission method is applied to the base station such as above-described embodiment, and base station includes digital units DU and at least one radio-cell RU.
For the first RU at least one RU, data transmission method provided by the embodiments of the present application are as follows: the first RU is after getting customer traffic, customer traffic is handled according to preset protocol, generate second packet data compression protocol PDCP data packet, then, the first RU sends the 2nd PDCP data packet to DU.
As can be seen that the first RU in the embodiment of the present application sent to DU is the 2nd PDCP data packet.Compared with baseband I/Q data, requirement of the 2nd PDCP data packet to time delay is relatively low, and in this case, demand of the 2nd PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
Specifically, the first RU can be with to the method that DU sends the 2nd PDCP data packet are as follows: the first RU sends the 2nd PDCP data packet to DU by Ethernet.
Ethernet is that mature network of existing stage is disposed simple and convenient in this way, directly being connected by Ethernet between DU and the first RU.In the existing stage, it is laid out that cost is relatively low using Ethernet.
Specifically, the first RU is handled customer traffic according to preset protocol, the method for generating the 2nd PDCP data packet are as follows: firstly, the first RU is according to intermediate frequency IRF agreement pair Customer traffic is handled, and the second data flow is generated；Secondly, the second stream compression is changed to the 5th data packet according to physics PHY agreement by the first RU；Then, the first RU decapsulates the 5th data packet according to MAC protocol, to obtain the 6th data packet；Finally, the first RU decapsulates the 6th data packet according to rlc protocol, to obtain the 2nd PDCP data packet.
It is easily understood that, it is actually the flow direction according to data packet that first RU, which carries out the method that processing generates the 2nd PDCP data packet to customer traffic according to preset protocol, data packet is carried out using each protocol layer respective treated, and treatment process is identical as existing protocol, is no longer described in detail herein.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, the accompanying drawings required for describing the embodiments of the present invention are briefly described below, it should be apparent that, the drawings in the following description are only some examples of the present application.
Fig. 1 is the structural schematic diagram of distributed base station；
Fig. 2 is the protocol stack schematic diagram in the base station of LTE communication system；
Fig. 3 is the structural schematic diagram one of digital units provided by the embodiments of the present application；
Fig. 4 is the structural schematic diagram one of radio-cell provided by the embodiments of the present application；
Fig. 5 is the structural schematic diagram two of digital units provided by the embodiments of the present application；
Fig. 6 is the structural schematic diagram two of radio-cell provided by the embodiments of the present application；
Fig. 7 is the structural schematic diagram of base station provided by the embodiments of the present application；
Fig. 8 is the flow diagram one of data transmission method provided by the embodiments of the present application；
Fig. 9 is the flow diagram two of data transmission method provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.
In being described below, for illustration and not for limitation, the detail of such as specific system structure, interface, technology etc is proposed, understand the application to cut thoroughly.However, it will be clear to one skilled in the art that the application also may be implemented in the other embodiments without these details.In other situations, omit to well-known mobile device, The detailed description of circuit and method, so as not to obscure the description of the present application with unnecessary details.
In addition, the terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
When the embodiment of the present application refers to the ordinal numbers such as " first ", " second ", unless the based on context meaning of its certain order of representation, it is appreciated that being only to distinguish to be used.
Various technologies described herein can be used in various Radio Network Systems, such as GSM (Global System for Mobile Communications, global system for mobile communications), CDMA (Code Division Multiple Access, CDMA) 2000 systems, wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access wireless), long term evolution (LTE, Long Term Evolution) system and other such communication systems.
At present, wireless communication system is constructed by dividing being executed for task between multiple protocol layers, each node or entity in the system are both configured to each agreement layered data processing in protocol stack, wherein logically corresponding to can communicate with each other between protocol layer.
Fig. 2 shows the protocol stacks of the 1st layer protocol, l2 protocol and layer-3 protocol composition in the base station based on LTE communication system.
1st layer protocol includes IRF (Tntermediate Radio Frequence, intermediate frequency) layer and PHY layer (Physical Layer, physical layer).IRF layers are mainly used for realizing the radio-frequency enableds such as filtering, digital-to-analogue conversion (D/A conversion), analog-to-digital conversion (A/D conversion), Up/Down Conversion, power amplification.PHY layer is mainly used for the mapping etc. to business datum to physical channel.
L2 protocol includes MAC (Media Access Control, media access control) layer, RLC (Radio Link Control, wireless spread-spectrum technology) layer and PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol) layer.
Wherein, MAC layer is mainly used for managing HARQ (Hybrid Automatic Repeat reQuest, hybrid automatic repeat-request) function and the scheduling to business datum.Rlc layer is mainly used for segmentation/cascade to business datum, re-transmission and sequentially submits.PDCP layers of master It is used to that IP (Internet Protocol, the agreement interconnected between network) head to be compressed, decompressed, encrypts business datum, decrypts, transmission services data etc..
Layer-3 protocol includes RRC (Radio Resource Control, wireless heterogeneous networks) layer.Rrc layer is mainly used for providing system information broadcast, RRC connection control, mobile management, mobility measurements etc..
Currently, usually used is the distribution-type base station architecture that DU is separated with RU in LTE communication system.Wherein, DU is responsible for processing of RRC, PDCP layers, rlc layer, MAC layer and PHY layer, including high level data transmission, scheduling and base band signal process etc..RU is responsible for IRF layers of processing, main Up/Down Conversion, power amplifier, filtering, the conversion of middle radiofrequency signal etc. for realizing signal.One DU can connect multiple RU, be connected between DU and RU using optical fiber, transmit baseband I/Q data by the CPRI of standard between DU and RU.
Since baseband I/Q data data volume is generally all bigger, and baseband I/Q data is relatively high to delay requirement, therefore, with on base station, antenna number is continuously increased, baseband I/Q data the data volume transmitted between DU and RU can be multiplied, so that demand of the baseband I/Q data to transmission bandwidth is very big.
Regarding to the issue above, this application provides digital units, radio-cell, base station and data transmission methods, the functional module for including by adjusting existing digital units and inside wireless elements, so that baseband I/Q data is no longer transmitted between digital units and radio-cell, to reduce the transmission bandwidth between digital units and radio-cell.
The embodiment of the present application provides a kind of digital units DU, as shown in figure 3, the DU includes packet data compression protocol PDCP functional module 30 and radio resource control RRC functional module 31.
Specifically, the function that each unit module provided by the embodiments of the present application is realized is specific as follows:
The RRC functional module 31 for obtaining the first data packet for including at least payload, and sends first data packet to the PDCP functional module 30.
The PDCP functional module 30, the first data packet sent for receiving the RRC functional module 11 encapsulate first data packet according to PDCP, to generate the first PDCP data packet, and for sending the first PDCP data packet to the first RU.
Further, the PDCP functional module 30 is specifically used for sending the first PDCP data packet to the first RU by Ethernet.
The first PDCP data packet transmitted between DU and the first RU in the embodiment of the present application can be transmitted using common Ethernet, Ethernet is mature network of existing stage, in this way, directly being connected by Ethernet between DU and the first RU, dispose simple and convenient.In the existing stage, it is laid out that cost is relatively low using Ethernet.
Specifically, the RRC functional module 31, the downlink data packet sent specifically for receiving the equipment of the core network, are handled the downlink data packet according to RRC agreement, the first data packet is generated.
It should be noted that, RRC functional module is 3GPP (3rd Generation Partnership Project, third generation partner program) cyberspeak, there may be the functional entitys with similar functions in other non-3 GPP network, but are not named as RRC functional module.Therefore, the RRC functional module in the embodiment of the present application is used to indicate the functional module for having similar functions.
Similarly, the PDCP functional module in the embodiment of the present application is used to indicate the functional module for having similar functions.
Above-mentioned RRC functional module is handled the data packet that it gets all in accordance with existing RRC agreement, and above-mentioned PDCP functional module is handled the data packet that it gets all in accordance with existing PDCP.
In addition, on a control plane, PDCP functional module 30 and RRC functional module 31 in the embodiment of the present application send signaling according to the regulation of corresponding existing protocol and receive signaling, no longer it is described in detail herein.
The data transmitted between DU and the first RU in the embodiment of the present application are the first PDCP data packet for including the packet header PDCP and payload, compared with baseband I/Q data, requirement of the first PDCP data packet to time delay is relatively low, in this case, demand of the first PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
The embodiment of the present application provides a kind of radio-cell RU, as shown in figure 4, the RU includes Wireless spread-spectrum technology RLC functional module 40, media access control MAC functional module 41, physics PHY functional module 42 and intermediate frequency IRF functional module 43.
Specifically, the function that each unit module provided by the embodiments of the present application is realized is specific as follows:
The RLC functional module 40, for receiving the first PDCP data packet of digital units DU transmission, and for encapsulating the first PDCP data packet according to rlc protocol, to generate the second data packet, and for sending second data packet to the MAC functional module 41.
The MAC functional module 41, second data packet sent for receiving the RLC functional module 40 encapsulate second data packet according to MAC protocol, to generate third data packet, and for sending the third data packet to the PHY functional module 42.
The PHY functional module 42, the third data packet sent for receiving the MAC functional module 41, is converted to the first data flow for the third data packet according to PHY agreement, and send first data flow to the IRF functional module 43.
The IRF functional module 43, first data flow sent for receiving the PHY functional module 42, and first data flow is handled according to IRF agreement, data flow to be sent is generated, and for sending the data flow to be sent.
Further, the RLC functional module 40, specifically for receiving the first PDCP data packet that the DU is sent by Ethernet.
Ethernet is that mature network of existing stage is disposed simple and convenient in this way, directly being connected by Ethernet between DU and the first RU.In the existing stage, it is laid out that cost is relatively low using Ethernet.
It should be noted that RLC functional module is 3GPP cyberspeak, there may be the functional entitys with similar functions in other non-3 GPP network, but are not named as RLC functional module.Therefore, the RLC functional module in the embodiment of the present application is used to indicate the functional module for having similar functions.
Similarly, the MAC functional module in the embodiment of the present application, RHY functional module and IRF functional module are also all respectively used to the functional module for indicating to have similar functions.
Above-mentioned MAC functional module is handled received data packet all in accordance with existing MAC protocol, and above-mentioned RHY functional module is all in accordance with existing RHY agreement to received Data packet is handled, and above-mentioned IRF functional module is handled received data packet all in accordance with existing IRF agreement.
In addition, on a control plane, RLC functional module 40, MAC functional module 41, PHY functional module 42 and IRF functional module 43 in the embodiment of the present application send signaling according to the regulation of corresponding existing protocol and receive signaling, no longer it is described in detail herein.
The data transmitted between DU and the first RU in the embodiment of the present application are the first PDCP data packet for including the packet header PDCP and payload, compared with baseband I/Q data, requirement of the first PDCP data packet to time delay is relatively low, in this case, demand of the first PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
The embodiment of the present application provides a kind of digital units DU, as shown in figure 5, the DU includes packet data compression protocol PDCP functional module 50 and radio resource control RRC functional module 51.
Specifically, the function that each unit module provided by the embodiments of the present application is realized is specific as follows:
The PDCP functional module 50, the 2nd PDCP data packet sent for receiving the first RU, and for decapsulating the 2nd PDCP data packet, to obtain the 4th data packet, 4th data packet includes at least payload, and for sending the 4th data packet to the RRC functional module.
The RRC functional module 51, the 4th data packet sent for receiving the PDCP functional module 50, is handled the 4th data packet according to RRC agreement, to generate upstream data packet, and sends the upstream data packet to equipment of the core network.
Further, the PDCP functional module 50, specifically for receiving the 2nd PDCP data packet that the first RU is sent by Ethernet.
The 2nd PDCP data packet transmitted between DU and the first RU in the embodiment of the present application can be transmitted using common Ethernet, Ethernet is mature network of existing stage, in this way, directly being connected by Ethernet between DU and the first RU, dispose simple and convenient.In the existing stage, it is laid out that cost is relatively low using Ethernet.
It should be noted that RRC functional module is 3GPP (3rd Generation Partnership Project, third generation partner program) cyberspeak, there may be the functional entitys with similar functions in other non-3 GPP network, but are not named as RRC functional module.Therefore, the RRC functional module in the embodiment of the present application is used to indicate the functional module for having similar functions.
Similarly, the PDCP functional module in the embodiment of the present application is used to indicate the functional module for having similar functions.
Above-mentioned RRC functional module is handled the data packet that it gets all in accordance with existing RRC agreement, and above-mentioned PDCP functional module is handled the data packet that it gets all in accordance with existing PDCP.
In addition, on a control plane, PDCP functional module 50 and RRC functional module 51 in the embodiment of the present application send signaling according to the regulation of corresponding existing protocol and receive signaling, no longer it is described in detail herein.
The data transmitted between DU and the first RU in the embodiment of the present application are the 2nd PDCP data packet, compared with baseband I/Q data, requirement of the 2nd PDCP data packet to time delay is relatively low, in this case, demand of the 2nd PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
The embodiment of the present application provides a kind of radio-cell RU, as shown in fig. 6, the RU includes wireless spread-spectrum technology RLC functional module 60, media access control MAC functional module 61, physics PHY functional module 62 and intermediate frequency IRF functional module 63.
Specifically, the function that each unit module provided by the embodiments of the present application is realized is specific as follows:
The IRF functional module 63 is handled the customer traffic according to IRF agreement for obtaining customer traffic, to generate the second data flow, and sends second data flow to the PHY functional module 62.
The PHY functional module 62, second data flow sent for receiving the IRF functional module 63, and second stream compression is changed to by the 5th data packet according to PHY agreement, and for sending the 5th data packet to the MAC functional module 61.
The MAC functional module 61 is sent for receiving the PHY functional module 62 The 5th data packet, and the 5th data packet is decapsulated according to MAC protocol, to obtain the 6th data packet, and for sending the 6th data packet to the RLC functional module 60.
The RLC functional module 60, the 6th data packet sent for receiving the MAC functional module 61, and the 6th data packet is decapsulated according to rlc protocol, to obtain the 2nd PDCP data packet, and with to digital units DU transmission the 2nd PDCP data packet.
Further, the RLC functional module 60 is specifically used for sending the 2nd PDCP data packet to digital units DU by Ethernet.
Ethernet is that mature network of existing stage is disposed simple and convenient in this way, directly being connected by Ethernet between DU and the first RU.In the existing stage, it is laid out that cost is relatively low using Ethernet.
It should be noted that RLC functional module is 3GPP cyberspeak, there may be the functional entitys with similar functions in other non-3 GPP network, but are not named as RLC functional module.Therefore, the RLC functional module in the embodiment of the present application is used to indicate the functional module for having similar functions.
Similarly, the MAC functional module in the embodiment of the present application, RHY functional module and IRF functional module are also all respectively used to the functional module for indicating to have similar functions.
Above-mentioned MAC functional module is handled received data packet all in accordance with existing MAC protocol, above-mentioned RHY functional module is handled received data packet all in accordance with existing RHY agreement, and above-mentioned IRF functional module is handled received data packet all in accordance with existing IRF agreement.
In addition, on a control plane, RLC functional module 60, MAC functional module 61, PHY functional module 62 and IRF functional module 63 in the embodiment of the present application send signaling according to the regulation of corresponding existing protocol and receive signaling, no longer it is described in detail herein.
The data transmitted between DU and the first RU in the embodiment of the present application are the 2nd PDCP data packet, compared with baseband I/Q data, requirement of the 2nd PDCP data packet to time delay is relatively low, in this case, demand of the 2nd PDCP data packet to transmission bandwidth is relatively low, the data volume for being conducive to reduce interaction between digital units and radio-cell, to reduce The demand of transmission bandwidth.
The embodiment of the present application provides a kind of base station, as shown in fig. 7, comprises the digital units DU 70 as described in above-described embodiment and at least one radio-cell RU 71 as described in above-described embodiment, wherein pass through Ethernet connection between the DU 70 and each RU 71.
For the more detailed process flow that DU 70 is realized, the above-mentioned description to DU is please referred to, is no longer described in detail herein.
Similarly, the more detailed process flow realized for each RU 71 please refers to the above-mentioned description to RU, is not described in detail herein.
The embodiment of the present application provides a kind of base station, which includes DU and at least one RU.The embodiment of the present application by adjusting DU in base station and RU internal functional architecture, so that the data transmitted between DU and each RU are PDCP data packet, compared with baseband I/Q data, requirement of the PDCP data packet to time delay is relatively low, in this case, demand of the PDCP data packet to transmission bandwidth is relatively low, and is conducive to the data volume for reducing interaction between digital units and radio-cell, to reduce the demand of transmission bandwidth.
The embodiment of the present application provides a kind of data transmission method, and applied to the base station as described in above-described embodiment, which includes DU and at least one RU.
Specifically, DU sends downlink data to the first RU (at least one RU any one), as shown in figure 8, data transmission method provided by the embodiments of the present application includes: in the application scenarios of transmission downlink data
S801, DU obtain the first data packet for including at least payload.
S802, DU encapsulate the first data packet according to PDCP, generate the first PDCP data packet.
S803, DU send the first PDCP data packet to the first RU.
S804, the first RU receive the first PDCP data packet that DU is sent.
S805, the first RU are handled the first PDCP data packet according to preset protocol, generate data flow to be sent.
S806, the first RU send data flow to be sent.
Specifically, the first data packet that DU is got in the embodiment of the present application is that DU is receiving core After the downlink data that heart net equipment is sent, the data packet after being handled according to RRC agreement downlink data.
Wherein, the treatment process and RRC functional module in the prior art that DU carries out downlink data according to RRC agreement are identical to the treatment process of downlink data, are no longer described in detail herein.
It is connected between DU and the first RU by Ethernet in the embodiment of the present application, therefore, DU sends the first PDCP data packet to the first RU by Ethernet.
Since Ethernet is mature network of existing stage, the deployment of DU and the first RU can be directly using the Ethernets disposed, in this way, the lower deployment cost of DU and the first RU will substantially reduce.
Specifically, the first RU is handled the first PDCP data packet according to preset protocol, the method for generating data flow to be sent are as follows: first, the first RU the first PDCP data packet encapsulated according to rlc protocol, to generate the second data packet；Secondly, the first RU encapsulates the second data packet according to MAC protocol, to generate third data packet；Then, third data packet is converted to the first data flow according to PHY agreement by the first RU；Finally, the first RU is handled the first data flow according to IRF agreement, generates data flow to be sent.
It can be understood that, above-mentioned first RU carries out the method that processing generates data flow to be sent to the first PDCP data packet according to preset protocol, substantially the first RU utilize it includes each functional module process that the first PDCP data packet received is respectively processed.
Specifically, the first RU sends upstream data to DU, as shown in figure 9, data transmission method provided by the embodiments of the present application includes: in the application scenarios of transmission upstream data
S901, the first RU obtain customer traffic.
S902, the first RU are handled customer traffic according to preset protocol, generate the 2nd PDCP data packet.
S903, the first RU send the 2nd PDCP data packet to DU.
S904, DU receive the 2nd PDCP data packet that the first RU is sent.
S905, DU decapsulate the 4th data packet that the 2nd PDCP data packet includes at least payload according to PDCP.
S906, DU are handled the 4th data packet according to RRC agreement, line number in generation According to packet.
S907, DU send upstream data packet to equipment of the core network.
Specifically, the first RU is handled customer traffic according to preset protocol in the embodiment of the present application, the method that generates the 2nd PDCP data packet are as follows: first, the first RU customer traffic is handled according to IRF agreement, generate the second data flow；Secondly, the second stream compression is changed to the 5th data packet according to PHY agreement by the first RU；Then, the first RU decapsulates the 5th data packet according to MAC, obtains the 6th data packet；Finally, the first RU decapsulates the 6th data packet according to rlc protocol, to obtain the 2nd PDCP data packet.
It is understood that above-mentioned first RU carries out the method that processing generates the 2nd PDCP data packet to customer traffic according to preset protocol, substantially the first RU utilize it includes each functional module process that the customer traffic received is respectively processed.
In the embodiment of the present application, whether DU sends downlink data or the first RU to the first RU and sends upstream data to DU, and the data transmitted therebetween are PDCP data packet.Compared with baseband I/Q data, requirement of the PDCP data packet to time delay is relatively low, and in this case, demand of the PDCP data packet to transmission bandwidth is relatively low, and is conducive to the data volume for reducing interaction between DU and RU, to reduce the demand of transmission bandwidth.
Illustratively, by taking 2T2R as an example, according to agreement 3GPP TS36.213, the transmission bandwidth of single antenna is 75Mbps, then use data transmission method provided by the embodiments of the present application, transmission bandwidth needed for PDCP data packet is 150Mbps (75 × 2=150) in single cell, considers other expenses, transmission bandwidth needed for PDCP data packet is about 190Mbps in single cell.In same scene, if what is transmitted between RU and the first DU is baseband I/Q data, bandwidth needed for baseband I/Q data is 2.4576Gbps in single cell.
It is easy to obtain, using data transmission method provided by the embodiments of the present application, bandwidth needed for the PDCP data packet transmitted between DU and the first RU is only 7.7% (190/2457.6=7.7%) of bandwidth needed for using the baseband I/Q data transmitted between prior art DU and the first RU.
In addition, the function achieved by PDCP layers existing can be seen that, by PDCP, treated that data are encrypted, and can guarantee the safety for transmitting data in this way.Corresponding, the data for being sent to PDCP layers from rlc layer are also encrypted.
Since PDCP functional module is located in DU in the embodiment of the present application, RLC functional module is located in the first RU, and therefore, the PDCP data packet transmitted between DU and the first RU in the embodiment of the present application is also encrypted, in this way, improving the safety for transmitting data between DU and RU.
Illustratively, base station sends the first business datum to the first RU, sends the second business datum to WiFi access point to realize the multithread convergence of LTE and WiFi by shunting downlink service data from PDCP layers.For existing WiFi access point based on the considerations of cost, WiFi access point is the function of cannot achieve encrypting and decrypting.In the application scenarios that the multithread of LTE and WiFi is converged, using data transmission method provided by the embodiments of the present application, the second business datum that WiFi access point receives is encrypted, compared with prior art, the safety of WiFi access point is effectively raised using data transmission method provided by the embodiments of the present application.
Further, it is connected between DU and the first RU by Ethernet in the embodiment of the present application, lower deployment cost can not only be reduced, moreover it is possible to improve disposition flexibility.It illustratively, is only in one equipment of inside of base station additions and deletions, without the configuration of entire base station to be adjusted in additions and deletions RU using the base station in the embodiment of the present application.
It is apparent to those skilled in the art that, for convenience and simplicity of description, only the example of the division of the above functional modules, in practical application, it can according to need and be completed by different functional modules above-mentioned function distribution, the internal structure of mobile device is divided into different functional modules, to complete all or part of the functions described above.The specific work process of the system of foregoing description, mobile device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, mobile device and method may be implemented in other ways.Such as, mobile device embodiment described above is only schematical, such as, the division of the module or unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of mobile device or unit, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, and component shown as a unit may or may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in each embodiment of the application can integrate in one processing unit, it is also possible to each unit and physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated unit both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product, can store in a computer readable storage medium.Based on this understanding, substantially all or part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products the technical solution of the application in other words, the computer software product is stored in a storage medium, it uses including some instructions so that a computer equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute each embodiment the method for the application all or part of the steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), the various media that can store program code such as magnetic or disk.
It is described above; the only specific embodiment of the application, but the protection scope of the application is not limited thereto, and anyone skilled in the art is within the technical scope of the present application; it can easily think of the change or the replacement, should all cover within the scope of protection of this application.Therefore, the protection scope of the application should be based on the protection scope of the described claims.

Claims (20)

  1. A kind of digital units DU, which is characterized in that the DU includes: packet data compression protocol PDCP functional module and radio resource control RRC functional module；Wherein,
    The RRC functional module, for obtaining the first data packet, first data packet includes at least payload, and sends first data packet to the PDCP functional module；
    The PDCP functional module, the first data packet sent for receiving the RRC functional module encapsulate first data packet according to PDCP, to generate the first PDCP data packet, and for sending the first PDCP data packet to the first RU.
  2. Digital units DU according to claim 1, which is characterized in that
    The PDCP functional module is specifically used for sending the first PDCP data packet to the first RU by Ethernet.
  3. Digital units DU according to claim 1 or 2, which is characterized in that
    The RRC functional module, the downlink data packet sent specifically for receiving equipment of the core network, is handled the downlink data packet according to RRC agreement, generates first data packet.
  4. A kind of radio-cell RU, which is characterized in that the RU includes: wireless spread-spectrum technology RLC functional module, media access control MAC functional module, physics PHY functional module and intermediate frequency IRF functional module；Wherein,
    The RLC functional module, the first PDCP data packet sent for receiving digital units DU, and for encapsulating the first PDCP data packet according to rlc protocol, to generate the second data packet, and for sending second data packet to the MAC functional module；
    The MAC functional module, second data packet sent for receiving the RLC functional module encapsulate second data packet according to MAC protocol, to generate third data packet, and for sending the third data packet to the PHY functional module；
    The third data packet is converted to the first data flow according to PHY agreement, and sends first data flow to the IRF functional module by the PHY functional module, the third data packet sent for receiving the MAC functional module；
    The IRF functional module, first data flow sent for receiving the PHY functional module, and first data flow is handled according to IRF agreement, it generates to be sent Data flow, and for the data flow to be sent to be sent.
  5. Radio-cell RU according to claim 4, which is characterized in that
    The RLC functional module, specifically for receiving the first PDCP data packet that the DU is sent by Ethernet.
  6. A kind of digital units DU, which is characterized in that the DU includes: packet data compression protocol PDCP functional module and radio resource control RRC functional module；Wherein,
    The PDCP functional module, for receiving the 2nd PDCP data packet of the first RU transmission, and for decapsulating the 2nd PDCP data packet according to PDCP, to obtain the 4th data packet, 4th data packet includes at least payload, and for sending the 4th data packet to the RRC functional module；
    The RRC functional module, the 4th data packet sent for receiving the PDCP functional module, is handled the 4th data packet according to RRC agreement, to generate upstream data packet, and sends the upstream data packet to equipment of the core network.
  7. Digital units DU according to claim 6, which is characterized in that
    The PDCP functional module, specifically for receiving the 2nd PDCP data packet that the first RU is sent by Ethernet.
  8. A kind of radio-cell RU, which is characterized in that the RU includes: wireless spread-spectrum technology RLC functional module, media access control MAC functional module, physics PHY functional module and intermediate frequency IRF functional module；Wherein,
    The IRF functional module is handled the customer traffic according to IRF agreement for obtaining customer traffic, to generate the second data flow, and sends second data flow to the PHY functional module；
    The PHY functional module, second data flow sent for receiving the IRF functional module, and second stream compression is changed to by the 5th data packet according to PHY agreement, and for sending the 5th data packet to the MAC functional module；
    The MAC functional module, the 5th data packet sent for receiving the PHY functional module, and the 5th data packet is decapsulated according to MAC protocol, to obtain the 6th data packet, and for sending the 6th data packet to the RLC functional module；
    The RLC functional module, described for receiving that the MAC functional module sends Six data packets, and the 6th data packet is decapsulated according to rlc protocol, to obtain the 2nd PDCP data packet, and with to digital units DU transmission the 2nd PDCP data packet.
  9. Radio-cell RU according to claim 8, which is characterized in that
    The RLC functional module is specifically used for sending the 2nd PDCP data packet to digital units DU by Ethernet.
  10. A kind of base station, it is characterized in that, including the digital units DU and at least one radio-cell RU as described in any one of claim 4-5 as described in any one of the claims 1-3, it or include digital units DU as described in any one of the claims 6-7 and at least one radio-cell RU as described in any one of claim 8-9, wherein, pass through network connection between the DU and each RU.
  11. A kind of data transmission method, which is characterized in that be applied to base station as claimed in claim 10, the base station includes digital units DU and at least one radio-cell RU, and the data transmission method includes:
    The DU obtains the first data packet, and first data packet includes at least payload；
    The DU encapsulates first data packet according to packet data compression protocol PDCP, to generate the first PDCP data packet；
    The DU sends the first PDCP data packet to the first RU, wherein the first RU is any one at least one described RU.
  12. Data transmission method according to claim 11, which is characterized in that the DU sends the first PDCP data packet to the first RU, specifically includes:
    The DU sends the first PDCP data packet to the first RU by Ethernet.
  13. A kind of data transmission method, which is characterized in that be applied to base station as claimed in claim 10, the base station includes digital units DU and at least one radio-cell RU, and for the first RU at least one described RU, the data transmission method includes:
    First RU receives the first packet data compression protocol PDCP data packet that the DU is sent；
    First RU is handled the first PDCP data packet according to preset protocol, generates data flow to be sent；
    First RU sends the data flow to be sent.
  14. Data transmission method according to claim 13, which is characterized in that the first RU receives the first PDCP data packet that the DU is sent, and specifically includes:
    First RU receives the first PDCP data packet that the DU is sent by Ethernet.
  15. Data transmission method described in 3 or 14 according to claim 1, which is characterized in that the first RU is handled the first PDCP data packet according to preset protocol, is generated data flow to be sent, is specifically included:
    First RU encapsulates the first PDCP data packet, according to wireless spread-spectrum technology rlc protocol to generate the second data packet；
    First RU encapsulates second data packet, according to media access control MAC protocol to generate third data packet；
    First RU is converted to the first data flow according to physics PHY agreement, by the third data packet；
    First RU is handled first data flow according to intermediate frequency IRF agreement, generates the data flow to be sent.
  16. A kind of data transmission method, which is characterized in that be applied to base station as claimed in claim 10, the base station includes digital units DU and at least one radio-cell RU, and the data transmission method includes:
    The DU receives the second packet data compression protocol PDCP data packet that the first RU is sent, and the first RU is any one at least one described RU；
    The DU decapsulates the 2nd PDCP data packet according to PDCP, obtains the 4th data packet, and the 4th data packet includes at least payload；
    The DU is handled the 4th data packet according to radio resource control RRC agreement, generates upstream data packet；
    The DU sends the upstream data packet to equipment of the core network.
  17. Data transmission method according to claim 16, which is characterized in that the DU receives the 2nd PDCP data packet that the first RU is sent, and specifically includes:
    The DU receives the 2nd PDCP data packet that the first RU is sent by Ethernet.
  18. A kind of data transmission method, which is characterized in that be applied to base station as claimed in claim 10, the base station includes digital units DU and at least one radio-cell RU, right The first RU at least one described RU, the data transmission method include:
    First RU obtains customer traffic；
    First RU is handled the customer traffic according to preset protocol, generates second packet data compression protocol PDCP data packet；
    First RU sends the 2nd PDCP data packet to the DU.
  19. Data transmission method according to claim 18, which is characterized in that the first RU sends the 2nd PDCP data packet to the DU, specifically includes:
    First RU sends the 2nd PDCP data packet to the DU by Ethernet.
  20. Data transmission method described in 8 or 19 according to claim 1, which is characterized in that the first RU is handled the customer traffic according to preset protocol, is generated the 2nd PDCP data packet, is specifically included:
    First RU is handled the customer traffic according to intermediate frequency IRF agreement, generates the second data flow；
    Second stream compression is changed to the 5th data packet according to physics PHY agreement by the first RU；
    First RU decapsulates the 5th data packet according to media access control MAC protocol, to obtain the 6th data packet；
    First RU decapsulates the 6th data packet according to wireless spread-spectrum technology rlc protocol, to obtain the 2nd PDCP data packet.
CN201680071225.3A 2016-05-11 2016-05-11 Digital units, radio-cell, base station and data transmission method Pending CN108370607A (en)

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