WO2017016304A1 - 一种数据传输方法、装置及计算机可读介质 - Google Patents

一种数据传输方法、装置及计算机可读介质 Download PDF

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Publication number
WO2017016304A1
WO2017016304A1 PCT/CN2016/083912 CN2016083912W WO2017016304A1 WO 2017016304 A1 WO2017016304 A1 WO 2017016304A1 CN 2016083912 W CN2016083912 W CN 2016083912W WO 2017016304 A1 WO2017016304 A1 WO 2017016304A1
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time period
current time
transmission data
parameter information
data
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PCT/CN2016/083912
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English (en)
French (fr)
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刘钱飞
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深圳市中兴微电子技术有限公司
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Publication of WO2017016304A1 publication Critical patent/WO2017016304A1/zh

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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
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present invention relates to a common public radio interface (CPRI) technology in the field of wireless communications, and in particular, to a data transmission method, a transmitting device, a receiving device, and a computer readable medium.
  • CPRI common public radio interface
  • CPRI is an interface standard jointly issued by a number of companies in the industry to define the interface protocol between a Radio Equipment Controller (REC) and a Radio Equipment (RE).
  • REC Radio Equipment Controller
  • RE Radio Equipment
  • the transmitting device transmits the transmission data of the CPRI superframe according to the fixed mapping rule, and accordingly, the receiving device receives the transmission data of the CPRI superframe according to the same fixed mapping rule, where Most of the fixed mapping rules are fixed by the high-level protocol. Both the transmitting device and the receiving device send and receive the transmitted data according to the same fixed mapping rule.
  • the above data transmission process has the following problem: the control word reserved field in the CPRI superframe is not fully utilized, and some redundant data needs to be transmitted in the above data transmission process, and the solidified mapping rule does not support dynamic change, thereby affecting The flexibility of CPRI data transmission.
  • Embodiments of the present invention provide a data transmission method, a transmitting apparatus, a receiving apparatus, and a computer readable medium, which are capable of fully utilizing a control word reserved field in a CPRI superframe in a data transmission process.
  • an embodiment of the present invention provides a data transmission method, including:
  • the transmission data of the current time period is transmitted according to the mapping rule of the transmission data of the current time period, and the transmission data of the current time period includes the data in the CPRI control word of the current time period and the non-CPRI control of the current time period.
  • the data in the word is the mapping rule of the transmission data of the current time period.
  • the parameter information includes: parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period.
  • an embodiment of the present invention provides a computer readable medium storing computer executable instructions, when executed, causing at least one processor to perform operations including:
  • the transmission data of the current period includes the data in the CPRI control word of the current time period and the data in the non-CPRI control word of the current time period.
  • an embodiment of the present invention provides a data transmission method, including:
  • the mapping rule of the transmission data of the current time period is a fixed mapping rule or a mapping rule obtained from a CPRI control word reserved field of a previous time period.
  • the parameter information includes: parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period.
  • the method further includes:
  • the parameter information of the transmission data of the current time period is parameter information acquired from a CPRI control word reserved field of a current time period or parameter information acquired from a CPRI control word reserved field of a previous time period.
  • an embodiment of the present invention provides a computer readable medium storing computer executable instructions, when executed, causing at least one processor to perform operations including:
  • mapping rule of the transmission data of the current time period Receiving, in the current time period, the transmission data of the current time period according to the mapping rule of the transmission data of the current time period; according to the transmission data of the current time period, from the general public radio interface CPRI control word retention field of the current time period Obtaining mapping rules of parameter information and/or transmission data of a next time period; wherein the mapping rule of the transmission data of the current time period is a fixed mapping rule or obtained from a CPRI control word reserved field of a previous time period Mapping rules.
  • an embodiment of the present invention provides a sending apparatus, where the sending apparatus includes:
  • the encapsulating unit is configured to encapsulate the parameter information and/or the mapping rule of the transmission data of the next time period into the general public radio interface CPRI control word reserved field of the current time period;
  • a sending unit configured to: after the encapsulating unit encapsulates the CPRI control word reserved field of the current time period, send the transmission data of the current time period according to the mapping rule of the transmission data of the current time period in the current time period, where the current time is The transmission data of the segment includes the data in the CPRI control word of the current time period and the data in the non-CPRI control word of the current time period.
  • the parameter information includes: parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period.
  • an embodiment of the present invention provides a receiving apparatus, where the receiving apparatus includes:
  • the receiving unit is configured to receive the transmission data of the current time period according to the mapping rule of the transmission data of the current time period in the current time period;
  • An obtaining unit configured to acquire parameter information and/or a next time period from a general public radio interface CPRI control word reserved field of the current time period according to the transmission data of the current time period received by the receiving unit Mapping rules for transmitting data;
  • the mapping rule of the transmission data of the current time period is a fixed mapping rule or a mapping rule obtained from a CPRI control word reserved field of a previous time period.
  • the parameter information includes: parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period.
  • the receiving device further includes a processing unit, where
  • the processing unit is configured to process, according to parameter information of the transmission data of the current time period, transmission data of the current time period received by the receiving unit;
  • the parameter information of the transmission data of the current time period is parameter information acquired from a CPRI control word reserved field of a current time period or parameter information acquired from a CPRI control word reserved field of a previous time period.
  • the technical solution provided by the embodiment of the present invention encapsulates the parameter information and/or the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period, and fully utilizes the control word reserved field in the current time period.
  • the parameter information and/or the mapping rule are encapsulated into the control word reserved field, and the method of the embodiment of the present invention can apply more data words to transmit more than the prior art package is transmitted in the data word. Data to improve data transmission efficiency.
  • the embodiment of the present invention can encapsulate the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period, so that the mapping rule of the transmission data of each time period can be dynamically changed, thereby enhancing the CPRI data transmission. Flexibility.
  • FIG. 2 is a schematic structural diagram of a CPRI superframe according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic flowchart of a data transmission method applied to a receiving device side according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic flowchart of a data transmission method according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of a mapping rule of a sending apparatus in a superframe according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram of a receiving apparatus according to Embodiment 2 of the present invention extracting transmission data from a superframe according to a mapping rule;
  • FIG. 7 is a structural block diagram of a transmitting apparatus according to Embodiment 3 of the present invention.
  • FIG. 8 is a structural block diagram of a receiving apparatus according to Embodiment 3 of the present invention.
  • the embodiment of the present invention provides a data transmission method, which is applied to the transmitting device side.
  • the processing procedure of the method in the embodiment of the present invention includes the following steps:
  • Step 101 Encapsulate the parameter information and/or the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period.
  • the link layer of CPRI defines a synchronous frame structure.
  • the most important concepts in the frame structure are superframe and basic frame, as shown in Figure 2, which is a schematic diagram of the reserved field of the CPRI control word of the CPRI superframe.
  • Reference numeral 210 is a frame within a 10 ms period.
  • Reference numeral 220 is a CPRI superframe, and each 10 ms frame contains 150 superframes: #0,...,#Z,...,#149.
  • Reference numeral 230 is a CPRI basic frame, and each super frame contains 256 basic frames: #0,..., #K,...,#255.
  • Reference numeral 240 denotes a CPRI control word within each basic frame.
  • Reference numeral 250 denotes each field in the CPRI control word within each basic frame, and there are reserved fields and non-reserved fields among these fields.
  • the data transmitted in the CPRI basic frame includes one control word and 15 data words, and the control word width transmitted in one CPRI basic frame is 16 bits, and the data is The word is 15 16bits.
  • a CPRI superframe contains 256 CPRI basic frames, and there is one control word in the data transmitted in each CPRI basic frame, so there are 256 control words in the data transmitted in one CPRI superframe.
  • the reserved field of the control word transmitted in one of the CPRI superframes is 36 16 bits.
  • the first valid data sent is the data in the control word.
  • the sending device before transmitting the transmission data, encapsulates the parameter information and/or the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period.
  • the current time period may be 0.5 CPRI superframes, and may be 1 CPRI superframe or multiple CPRI superframes, which is not limited in the embodiment of the present invention. If the current time period is 1 CPRI superframe, the mapping rules of the parameter information and/or the transmission data of the next time period are encapsulated into the CPRI control word reserved field of one CPRI superframe #Z shown in FIG. 2.
  • the transmitting device sequentially encapsulates the parameter information and/or the mapping rule of the transmission data of the next time period into the reserved field of the CPRI control word of the current time period.
  • Step 102 In the current time period, transmit the transmission data of the current time period according to the mapping rule of the transmission data of the current time period.
  • the transmitting device sends the transmission data of the current time period according to the mapping rule of the transmission data of the current time period, where the transmission data of the current time period includes the data in the CPRI control word of the current time period and the non-CPRI control word of the current time period.
  • the data in the CPRI control word of the current time period includes the data in the CPRI control word reserved field of the current time period, that is, encapsulated to be
  • the CPRI control word of the previous time period retains the parameter information in the field and/or the mapping rule of the transmission data of the next time period.
  • the data in the non-CPRI control word of the current time period includes the information data that the transmitting device needs to transmit.
  • the transmitting device sends the transmission data of the current time period according to the mapping rule of the transmission data of the current time period.
  • the mapping rule described herein divides the current time period into n (n is a positive integer greater than or equal to 1) sub-periods, and each sub-period includes m (m is a positive integer greater than or equal to 1) basic frames, mapping
  • mapping The rule specifies whether each system clock cycle in m basic frames is valid or invalid, transmits data in the effective system clock cycle, does not transmit data in the invalid system clock cycle, and uses the same mapping rule between sub-time periods.
  • the data sequence of the transmitting device transmits data according to the data structure of the basic frame (the basic frame structure is one control word unit located at the head of the basic frame and the remaining 15 data units) ).
  • the transmitting device transmits the transmission data only in the effective system clock cycle of the first sub-period according to the mapping rule, so the transmitting device is the first in the first sub-period.
  • the effective system clock cycle is transmitted in the control word unit of the first basic frame in the first sub-period, and the second to the sixteenth effective system clock cycle in the first sub-period is transmitted.
  • the data of the data unit of the basic frame in a sub-period, in the control word of the second basic frame in the first sub-period in the first sub-period of the first sub-period Data in this way, the transmitting device transmits data according to the mapping rule in the effective system time period of the first sub-period, and does not transmit data in the invalid system clock cycle in the first sub-period, and sequentially the first sub-period
  • the transmitted data is all sent out.
  • the transmission data of the first sub-period includes data encapsulated in the CPRI control word of the first sub-period and data of the non-control word portion. If n is an integer greater than 1, the transmission data of other sub-periods in the current time period is transmitted according to the same mapping rule as the first sub-period.
  • the method in the embodiment of the present invention is encapsulated in the CPRI control word reserved field of the current time period.
  • the information contains the following three situations:
  • the transmitting device only encapsulates the parameter information into the CPRI control word reserved field of the current time period.
  • the mapping rule of the transmission data of each time period may be agreed to be solidified by the higher layer protocol, that is, the mapping rules of the transmission data of each time period are all fixed, and at this time, the current time that the transmitting device is to send.
  • the CPRI control word reserved field of the segment does not need to encapsulate the mapping rule of the transmission data of the next time period, but only encapsulates the parameter information.
  • the parameter information may be parameter information of transmission data of a current time period or parameter information of transmission data of a next time period. If the parameter information is the parameter information of the transmission data of the current time period, the receiving device receives the transmission data of the current time period after the mapping rule of the transmission data according to the current time period, and then transmits the data according to the current time period. The parameter information processes the transmission data of the current time period; if the parameter information is the parameter information of the transmission data of the next time period, the receiving device receives the transmission data of the current time period according to the CPRI from the previous time period. The parameter information obtained in the control word reserved field processes the transmission data of the current time period.
  • the parameter information of the transmission data of the first time period may be pre-set and stored, and the transmitting device and the receiving device both know clearly, and receive After receiving the transmission data of the first time period, the device processes the transmission data of the first time period according to the parameter information of the transmission data of the first time period stored in advance.
  • the transmitting device only encapsulates the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period.
  • the mapping rule of the transmission data of each time period may be dynamically changed.
  • the transmitting device encapsulates the mapping rule of the transmission data of the next time period into the current time period.
  • the CPRI control word is reserved in the field.
  • the receiving device receives the transmission data of the current time period according to the mapping rule acquired from the CPRI control word reserved field of the previous time period, and acquires the mapping rule of the transmission data of the next time period from the transmission data of the current time period.
  • the current time period is the CPRI superframe F1, and the mapping rule of the transmission data D1 is Y1; the previous time period is the CPRI superframe F0, and the mapping rule of the transmission data D0 is Y0;
  • One time period is CPRI superframe F2, and the mapping rule for transmitting data to D2 is Y2.
  • the sending device encapsulates Y1 in the CPRI control word reserved field of F0, and encapsulates Y2 in the CPRI control word reserved field of F1; when receiving the D0 of F0, the receiving device obtains Y1 from the CPRI control word reserved field of F0; Thus, the receiving device will receive D1 of F1 according to Y1, and will obtain the mapping rule Y2 obtained from the CPRI control word reserved field of F1.
  • the mapping rule of the transmission data of the first time period is a fixed mapping rule set in advance, and both the transmitting device and the receiving device clearly understand the content of the mapping rule.
  • the transmitting device can transmit the transmission data of the first time period according to a preset fixed mapping rule; when receiving the transmission data of the first time period, the receiving device can be fixed according to a preset setting.
  • the mapping rule receives the transmission data of the first time period.
  • the transmitting device may encapsulate the parameter information into the data word of the CPRI for transmission.
  • the parameter information may be parameter information of transmission data of a current time period or parameter information of transmission data of a next time period.
  • the specific application refers to the description in the first case.
  • the transmitting device encapsulates the parameter information and the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period.
  • the mapping rule of the transmission data of each time period may be dynamically changed.
  • the parameter information may be parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period. Specific applications can refer to the description in the first case and the second case.
  • the embodiment of the present invention further provides a data transmission method, which is applied to the receiving device side.
  • the processing flow of the method in the embodiment of the present invention includes the following steps:
  • Step 301 In the current time period, extract the transmission data of the current time period according to the mapping rule of the transmission data of the current time period.
  • the transmitting device sends the transmission data of the current time period according to the mapping rule of the transmission data of the current time period, that is, the transmission data is sent only in the effective system clock period in the current time period; for details, refer to the description in step 102.
  • the receiving device needs to receive the transmission data of the current time period only in the effective system clock period specified by the mapping rule according to the mapping rule of the transmission data of the current time period.
  • the current time period includes a number of CPRI superframes, and the specific structure thereof can be referred to FIG. 2.
  • a CPRI superframe contains 256 basic frames, and each CPRI basic frame contains a control word, so a CPRI superframe contains 256 control words.
  • the reserved field of the control word in one of the CPRI superframes is 36 16 bits.
  • a CPRI basic frame contains 15 16-bit data words.
  • the structure of the transmission data of the current time period is as shown in FIG. 2.
  • the current time period includes a plurality of basic frames, and each basic frame has one control word unit and 15 data units, and these control word units and data units are included.
  • the data is the transmission data of the current time period.
  • the receiving device sequentially receives data in the effective system clock period of the n sub-periods of the current time period according to the mapping rule of the transmission data of the current time period, in the current time period.
  • Data received in the first valid system clock cycle of a sub-period is the data in the control word unit of the first basic frame in the first sub-period, and the second to the sixteenth effective system clock cycle Receiving data in the data unit of the first basic frame in the first sub-period, and receiving the data in the seventeenth effective system clock period of the first sub-period in the first sub-period
  • the data in the control word unit of the two basic frames is such that the transmission data in the first sub-time period in the current time period is sequentially received and assembled into a basic frame. If n is an integer greater than 1, then other sub-times in the current time period
  • the transmitted data of the segment is received according to the same mapping rule as the first sub-period.
  • Step 302 Obtain, according to the transmission data of the current time period, a mapping rule of the parameter information and/or the transmission data of the next time period from the general public radio interface CPRI control word reserved field of the current time period.
  • the transmission data of the current time period includes a CPRI control word of the current time period (a reserved field in the CPRI control word) and data in a CPRI data word of the current time period.
  • the data in the CPRI control word reserved field of the current time period includes parameter information and/or mapping rules of transmission data of the next time period, and the data in the CPRI data word of the current time period includes information data transmitted in the current time period.
  • the receiving device has extracted the transmission data in the basic frame in the current time period according to the mapping rule of the transmission data in the current time period, and the receiving device may restore and assemble the basic frame structure into one by one, from the current The mapping rule for obtaining parameter information and/or transmission data of the next time period in the CPRI control word reserved field in the basic frame in the time period.
  • the control information transmitted by the transmitting device may also be obtained from other control words, and the transmitted information data is obtained from the CPRI data words in the basic frame in the current time period.
  • mapping rules of the transmission data of the time period applied by the receiving device are all agreed to be solidified by the higher layer protocol, that is, the transmission data of each time period.
  • the mapping rules are all fixed.
  • the fixed mapping rules are pre-stored in the receiving device.
  • the receiving device can directly receive the transmission data of the current time period according to the mapping rule of the transmission data of the current time period, that is, the same fixed mapping rule. .
  • mapping rule of the transmission data of the next time period is encapsulated in the CPRI control word reserved field of the current time period
  • the mapping rule of the transmission data of each time period applied by the receiving device is dynamically changed, and the receiving device may follow the
  • the mapping rule obtained in the CPRI control word retention field of the previous time period is the mapping rule of the transmission data of the current time period, and receives the transmission data of the current time period.
  • the mapping rule for the transmission data of the first time period is preset.
  • the fixed mapping rules are fixed, and both the transmitting device and the receiving device have a clear understanding of the content of the mapping rule. In this way, when receiving the first time period, the receiving device can receive the transmission data of the current time period according to a preset fixed mapping rule.
  • the parameter information described in the method of the embodiment of the present invention includes: parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period.
  • the method further include:
  • the parameter information of the transmission data of the current time period is parameter information acquired from a CPRI control word reserved field of a current time period or parameter information acquired from a CPRI control word reserved field of a previous time period.
  • the parameter information of the transmission data of the first time period may be pre-set and stored, and the transmitting device and the receiving device are clearly understood. After the receiving device extracts the transmission data of the current time period, the first device according to the pre-stored The parameter information of the transmission data of the time period processes the transmission data of the first time period.
  • the method of the embodiment of the present invention encapsulates the parameter information and/or the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period, fully utilizes the control word reserved field in the current time period, and uses the parameter
  • the information and/or mapping rules are encapsulated into the control word reserved field.
  • the method of the embodiment of the present invention can apply more data words to transmit more data and improve. Data transmission efficiency.
  • the method of the embodiment of the present invention may encapsulate the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period, so that the mapping rule of the transmission data of each time period may dynamically change, and the CPRI data is enhanced. The flexibility of transmission.
  • the embodiment of the present invention provides a data transmission method. As shown in FIG. 4, the processing procedure of the method in the embodiment of the present invention includes the following steps:
  • Step 401 The sending device encapsulates the parameter information and the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period.
  • the current time period may be 0.5 CPRI superframes, and may be 1 CPRI superframe or multiple CPRI superframes, which is not limited in the embodiment of the present invention.
  • the specific structure of the CPRI superframe can be referred to FIG. 2.
  • the sending device when the transmitting device applies the CPRI for data transmission, the sending device encapsulates the parameter information and the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period.
  • the parameter information may be parameter information of transmission data of a current time period or parameter information of transmission data of a next time period.
  • Step 402 The sending apparatus sends the transmission data of the current time period according to the mapping rule of the transmission data of the current time period in the current time period.
  • the transmitting device sends the transmission data of the current time period according to the mapping rule of the transmission data of the current time period, where the transmission data of the current time period includes the data in the CPRI control word of the current time period and the non-CPRI control word of the current time period.
  • the data in the CPRI control word of the current time period includes the data in the CPRI control word reserved field of the current time period, that is, the parameter information encapsulated into the CPRI control word reserved field of the current time period and/or the transmission data of the next time period. Mapping rules.
  • the data in the non-CPRI control word of the current time period includes the information data that the transmitting device needs to transmit.
  • the process of transmitting the transmission data by the transmitting device is as shown in FIG. 2.
  • a basic frame is a whole, and the transmitting device sends the transmission data of the current time period according to the mapping rule of the transmission data of the current time period.
  • the mapping rule described herein divides the current time period into n (n is a positive integer greater than or equal to 1) sub-periods, and each sub-period includes m (m is greater than or equal to 1) Integer) basic frame, the mapping rule specifies whether each system clock cycle in m basic frames is valid or invalid, transmits data in the effective system clock cycle, does not transmit data in the invalid system clock cycle, and uses the same mapping between sub-time segments. rule.
  • the data sequence of the transmitting device transmits data according to the data structure of the basic frame (the basic frame structure is one control word unit located at the head of the basic frame and the remaining 15 data units) ).
  • the transmitting device transmits the transmission data only in the effective system clock cycle of the first sub-period according to the mapping rule, so the transmitting device is the first in the first sub-period.
  • the effective system clock cycle is transmitted in the control word unit of the first basic frame in the first sub-period, and the second to the sixteenth effective system clock cycle in the first sub-period is transmitted.
  • the data of the data unit of the basic frame in a sub-period, in the control word of the second basic frame in the first sub-period in the first sub-period of the first sub-period Data in this way, the transmitting device transmits data according to the mapping rule in the effective system time period of the first sub-period, and does not transmit data in the invalid system clock cycle in the first sub-period, and sequentially the first sub-period
  • the transmitted data is all sent out.
  • the transmission data of the first sub-period includes data encapsulated in the CPRI control word reserved field of the current sub-period and data of the non-control word portion. If n is an integer greater than 1, the transmission data of other sub-periods in the current time period is transmitted according to the same mapping rule as the first sub-period.
  • the transmitting device transmits data according to the mapping rule in the effective system clock period of the current time period, and does not transmit data during the invalid effective system clock period in the current time period, so that all the transmission data of the current time period is sent out.
  • the transmission data of the current time period includes parameter information encapsulated in the CPRI control word reserved field of the current time period and/or mapping rule of the transmission data of the next time period.
  • Step 403 The receiving device extracts the transmission data of the current time period according to the mapping rule of the transmission data of the current time period in the current time period.
  • step 402 the transmitting device sends the transmission data of the current time period according to the mapping rule of the transmission data of the current time period, that is, only transmits the transmission data in the effective effective system clock period in the current time period; at this time, the receiving device needs to follow
  • the mapping rule of the transmission data of the current time period receives the transmission data of the current time period only within the effective system clock period specified by the mapping rule.
  • the receiving device sequentially receives data in the effective system clock period of the n sub-periods of the current time period according to the mapping rule of the transmission data of the current time period, in the current time period.
  • Data received in the first valid system clock cycle of the first sub-period is the data in the control word unit of the first basic frame in the first sub-period, and the second to the sixteenth effective system clock cycle.
  • the data received in the data unit of the first basic frame in the first sub-period is received within the first sub-period of the first sub-period in the seventeenth effective system clock period.
  • the data in the control word unit of the second basic frame sequentially receives the transmission data in the first sub-time period in the current time period, and assembles into one basic frame. If n is an integer greater than 1, the transmission data of other sub-periods in the current time period is received according to the same mapping rule as the first sub-period.
  • Step 404 Obtain, according to the transmission data of the current time period, a mapping rule of the parameter information and the transmission data of the next time period from the general public radio interface CPRI control word reserved field of the current time period.
  • the receiving device has extracted the transmission data in the basic frame in the current time period according to the mapping rule of the transmission data of the current time period, and the receiving device may restore and assemble the basic frame structure into a single basic frame structure from the current The mapping rule for obtaining the parameter information and the transmission data of the next time period in the CPRI control word reserved field in the basic frame in the time period.
  • the control information transmitted by the transmitting device may also be obtained from other control words, and the transmitted information data is obtained from the CPRI data words in the basic frame in the current time period.
  • the mapping rule of the transmission data of the first time period is a preset fixed mapping rule, and both the transmitting device and the receiving device clearly understand the fixed mapping rule.
  • the transmitting device can transmit the transmission data of the first time period according to a preset fixed mapping rule; when receiving the data of the first time period, the receiving device can be preset according to the preset data.
  • a fixed mapping rule receives the transmission data for the first time period. At this time, the mapping rule of the transmission data of the current time period is a fixed mapping rule.
  • the mapping rule of the transmission data of the current time period may be obtained from the CPRI control word reserved field of the previous time period.
  • Step 405 The receiving device processes the transmission data of the current time period according to the parameter information of the transmission data of the current time period.
  • the parameter information encapsulated in the CPRI control word reserved field of the current time period by the transmitting device may be parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period.
  • the sending device in step 401 encapsulates the parameter information of the transmission data of the current time period into the CPRI control word reserved field of the current time period
  • the receiving device proceeds from the CPRI control word reserved field of the current time period in step 404.
  • the obtained parameter information is parameter information of the transmission data of the current time period, and the receiving device can process the transmission data of the current time period according to the parameter information of the transmission data of the current time period.
  • the receiving device obtains the parameter information obtained from the CPRI control word reserved field of the previous time period.
  • the receiving device may process the transmission data of the current time period according to the parameter information acquired in the CPRI control word retention field of the previous time period, that is, the parameter information of the transmission data of the current time period.
  • the parameter information of the transmission data of the first time period may be stored in advance, and the transmitting device and the receiving device are clearly understood.
  • the receiving device stores according to the pre-pre-storage. The first time period of the transmission data parameter information processing of the first time period Transfer data.
  • the parameter information is used as the parameter information of the transmission data of the current time period as an example for description.
  • the parameter information includes but is not limited to packet location indication information, packet address information, packet length information, packet number information, and packet verification information (Cryclic Redundancy Check (CRC)) Test, etc.).
  • a time period in an embodiment of the present invention is a time period of one superframe.
  • 210 is a frame within a 10 ms period.
  • 220 is a CPRI superframe, each 10ms frame contains 150 superframes, denoted as #0,...,#Z,...,#149.
  • 230 is a CPRI basic frame, each superframe contains 256 basic frames recorded as #0,...,#K,...,#255.
  • the transmitting apparatus encapsulates the parameter information and the mapping rule of the transmission data of the next time period into the CPRI control word reserved field 260 of the current time period, that is, the CPRI superframe #Z.
  • the transmitting device transmits the transmission data of the CPRI superframe #Z according to the mapping rule of the transmission data of the CPRI superframe #Z, and the receiving device extracts the transmission data of the received CPRI superframe #Z according to the mapping rule of the transmission data of the CPRI superframe #Z.
  • the receiving device when receiving the CPRI superframe #Z, the receiving device will follow the mapping rule 270 obtained from the CPRI control word reserved field of the previous time period, that is, the CPRI superframe #Z-1 (the transmission of the current time period).
  • the mapping rule of the data extracts the transmission data of the received CPRI superframe #Z.
  • 270 denotes a mapping rule acquired from the CPRI superframe #Z-1, which is a mapping rule of transmission data in the CPRI superframe #Z.
  • the mapping rule has k
  • the bit bit is in one-to-one correspondence with the k system clock cycles included in a basic frame.
  • the bit in the mapping rule field is 1 to indicate that the corresponding system clock cycle is a valid system clock cycle, and the bit in the mapping rule field is 0 to indicate the corresponding system clock cycle.
  • the receiving device can connect to each basic frame effective system clock cycle according to this mapping rule.
  • 280 represents k system clock cycles in one basic frame
  • 270 represents a mapping rule acquired from CPRI superframe #Z-1
  • the mapping rule has k bits and k in each basic frame.
  • the system clock cycles correspond one-to-one, and the receiving device extracts only the transmission data in the effective system clock cycle corresponding to the reception mapping rule field of 1.
  • the receiving device may extract and combine the mapping rules of the transmission data in the CPRI superframe #Z+1 in the CPRI control word reserved field of the CPRI superframe #Z, so as to receive the CPRI superframe.
  • the mapping rule is used to extract the transmitted data in the received CPRI superframe #Z+1.
  • An embodiment of the present invention provides a sending apparatus.
  • the sending apparatus includes: a packaging unit 701, and a sending unit 702, where
  • the encapsulating unit 701 is configured to encapsulate the parameter information and/or the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period;
  • the sending unit 702 is configured to: after the encapsulating unit 701 encapsulates the CPRI control word reserved field of the current time period CPRI superframe, send the transmission data of the current time period according to the mapping rule of the transmission data of the current time period in the current time period.
  • the transmission data of the current time period includes data in a CPRI control word of a current time period and data in a non-CPRI control word of a current time period.
  • the parameter information includes parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period.
  • An embodiment of the present invention provides a receiving apparatus.
  • the receiving apparatus includes: a receiving unit 801, and an obtaining unit 802, where
  • the receiving unit 801 is configured to receive the transmission data of the current time period according to the mapping rule of the transmission data of the current time period in the current time period;
  • the obtaining unit 802 is configured to receive the current time period according to the receiving unit 801
  • the rule is a fixed mapping rule or a mapping rule obtained from the CPRI control word reserved field of the previous time period.
  • the parameter information includes parameter information of the transmission data of the current time period or parameter information of the transmission data of the next time period.
  • the receiving device further includes a processing unit 803, where
  • the processing unit 803 is configured to process, according to the parameter information of the transmission data of the current time period, the transmission data of the current time period received by the receiving unit 801;
  • the parameter information of the transmission data of the current time period is parameter information acquired from a CPRI control word reserved field of a current time period or parameter information acquired from a CPRI control word reserved field of a previous time period.
  • the encapsulating unit 701 and the sending unit 702 may be a central processing unit (CPU), a microprocessor (MPU, a Micro Processor Unit), and a digital signal processor (DSP, located on the transmitting device). Digital Signal Processor) or Field-Programmable Gate Array (FPGA) implementation.
  • the receiving unit 801, the obtaining unit 802, and the processing unit 803 can be implemented by a device such as a CPU, an MPU, a DSP, or an FPGA located on the receiving device.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the parameter information and/or the mapping rule of the transmission data of the next time period are encapsulated into the CPRI control word reserved field of the current time period, and the control word reserved field in the current time period is fully utilized, and the parameter is used.
  • the information and/or mapping rules are encapsulated into the control word reserved field.
  • the method of the embodiment of the present invention can apply more data words to transmit more data and improve. Data transmission efficiency.
  • the embodiment of the present invention may encapsulate the mapping rule of the transmission data of the next time period into the CPRI control word reserved field of the current time period, so that the mapping rule of the transmission data of each time period may dynamically change. Thereby enhancing the flexibility of CPRI data transmission.

Abstract

本发明实施例公开了一种数据传输方法、装置及计算机可读介质，所述方法包括：将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中，在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。

Description

一种数据传输方法、装置及计算机可读介质 技术领域
本发明涉及无线通信领域的通用公共无线接口(CPRI，Common Public Radio Interface)技术，尤其涉及一种数据传输方法、发送装置、接收装置及计算机可读介质。
背景技术
CPRI是由业内多家公司联合发布的一套接口标准，用于定义无线设备控制器(REC，Radio Equipment Controller)和无线设备(RE，Radio Equipment)之间的接口协议。
在应用CPRI进行数据传输时，发送装置会按照固定映射规则来发送CPRI超帧的传输数据，相应的，接收装置会按照相同的固定映射规则接收到所述CPRI超帧的传输数据，这里所述固定映射规则大多通过高层协议进行约定固化的，发送装置和接收装置都依据相同的固定映射规则发送和接收传输数据。
然而，上述数据传输过程存在以下问题：CPRI超帧中的控制字保留字段没有得到充分利用，导致上述数据传输过程中需要传输一些冗余的数据，另外固化的映射规则不支持动态变化，从而影响CPRI数据传输的灵活性。
发明内容
本发明实施例提供一种数据传输方法、发送装置、接收装置及计算机可读介质，能够在数据传输过程中实现对CPRI超帧中的控制字保留字段的充分利用。
本发明的技术方案是这样实现的：
第一方面，本发明实施例提供一种数据传输方法，包括：
将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的通用公共无线接口CPRI控制字保留字段中；
在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。
上述方案中，所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
第二方面，本发明实施例提供一种计算机可读介质，存储有计算机可执行指令，当执行指令时，引起至少一个处理器执行包括以下的操作：
将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的通用公共无线接口CPRI控制字保留字段中；在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。
第三方面，本发明实施例提供一种数据传输方法，包括：
在当前时间段，按照当前时间段的传输数据的映射规则接收当前时间段的传输数据；
根据所述当前时间段的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则；
其中，所述当前时间段的传输数据的映射规则为固定的映射规则或从上一个时间段的CPRI控制字保留字段中获取的映射规则。
上述方案中，所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
上述方案中，在从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则之后，所述方法还包括：
根据当前时间段的传输数据的参数信息处理当前时间段的传输数据；
其中，所述当前时间段的传输数据的参数信息为从当前时间段的CPRI控制字保留字段中获取的参数信息或从上一个时间段的CPRI控制字保留字段中获取的参数信息。
第四方面，本发明实施例提供一种计算机可读介质，存储有计算机可执行指令，当执行指令时，引起至少一个处理器执行包括以下的操作：
在当前时间段，按照当前时间段的传输数据的映射规则接收当前时间段的传输数据；根据所述当前时间段的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则；其中，所述当前时间段的传输数据的映射规则为固定的映射规则或从上一个时间段的CPRI控制字保留字段中获取的映射规则。
第五方面，本发明实施例提供一种发送装置，发送装置包括：
封装单元，配置为将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的通用公共无线接口CPRI控制字保留字段中；
发送单元，配置为在所述封装单元封装完成当前时间段的CPRI控制字保留字段后，在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。
上述方案中，所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
第六方面，本发明实施例提供一种接收装置，接收装置包括：
接收单元，配置为在当前时间段，按照当前时间段的传输数据的映射规则接收当前时间段的传输数据；
获取单元，配置为根据所述接收单元接收到的所述当前时间段的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则；
其中，所述当前时间段的传输数据的映射规则为固定的映射规则或从上一个时间段的CPRI控制字保留字段中获取的映射规则。
上述方案中，所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
上述方案中，所述接收装置还包括处理单元，其中，
所述处理单元，配置为根据当前时间段的传输数据的参数信息处理所述接收单元接收到的当前时间段的传输数据；
其中，所述当前时间段的传输数据的参数信息为从当前时间段的CPRI控制字保留字段中获取的参数信息或从上一个时间段的CPRI控制字保留字段中获取的参数信息。
本发明实施例提供的技术方案，将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中，充分利用当前时间段中的控制字保留字段，且将参数信息和/或映射规则封装到控制字保留字段中，与现有技术中的封装在数据字中进行传输相比，本发明实施例方法可以应用更多的数据字来传输更多的数据，提高数据传输效率。另外，本发明实施例可以将下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中，这样各个时间段的传输数据的映射规则可以动态变化，从而增强CPRI数据传输的灵活性。
附图说明
图1为本发明实施例1提供的应用于发送装置一侧的一种数据传输方 法流程示意图；
图2为本发明实施例1提供的CPRI超帧结构示意图；
图3为本发明实施例1提供的应用于接收装置一侧的一种数据传输方法流程示意图；
图4为本发明实施例2提供的一种数据传输方法流程示意图；
图5为本发明实施例2提供的发送装置在超帧中封装映射规则的示意图；
图6为本发明实施例2提供的接收装置按照映射规则从超帧中提取传输数据的示意图；
图7为本发明实施例3提供的一种发送装置的结构框图；
图8为本发明实施例3提供的一种接收装置的结构框图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
实施例一
本发明实施例提供一种数据传输方法，应用于发送装置一侧，如图1所示，本发明实施例方法的处理流程包括以下步骤：
步骤101、将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中。
CPRI的链路层定义了一个同步的帧结构，帧结构中最重要的概念是超帧和基本帧，如图2所示，为CPRI超帧的CPRI控制字保留字段的示意图。
标号210是一个10ms时间段内的帧。
标号220是一个CPRI超帧，每个10ms帧包含150个超帧：#0，…，#Z，…，#149。
标号230是一个CPRI基本帧，每个超帧包含256个基本帧：#0，…， #K，…，#255。
标号240表示每个基本帧内的CPRI控制字。
标号250表示每个基本帧内的CPRI控制字中的各个字段，这些字段中有保留字段也有非保留字段。
在CPRI线速率为1228.8Mbit/s的情况下，CPRI基本帧(Basic Frame)中传输的数据中包括一个控制字和15个数据字，一个CPRI基本帧中传输的控制字位宽为16bit，数据字为15个16bit。从图2中可以看出一个CPRI超帧内包含256个CPRI基本帧，每个CPRI基本帧中传输的数据中有一个控制字，故一个CPRI超帧内传输的数据中有256个控制字。其中一个CPRI超帧中传输的控制字的保留字段为36个16bit。在传输数据的过程中，发送的第一个有效数据就是控制字中的数据。
本发明实施例方法中发送装置在发送传输数据之前，将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中。该当前时间段可以是0.5个CPRI超帧，可以是1个CPRI超帧，也可以是多个CPRI超帧，本发明实施例中并不作限制。若当前时间段是1个CPRI超帧，则将参数信息和/或下一个时间段的传输数据的映射规则封装到图2所示的1个CPRI超帧#Z的CPRI控制字保留字段中。
在本步骤中，发送装置将参数信息和/或下一个时间段的传输数据的映射规则依次封装到当前时间段的CPRI控制字的保留字段中。
步骤102、在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据。
发送装置会按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。当前时间段的CPRI控制字中的数据包括当前时间段的CPRI控制字保留字段中的数据，即封装到当 前时间段的CPRI控制字保留字段中的参数信息和/或下一个时间段的传输数据的映射规则。当前时间段的非CPRI控制字中的数据包括发送装置需要发送的信息数据。
发送装置会按照当前时间段的传输数据的映射规则将当前时间段的传输数据发送出去。这里所述的映射规则即，将当前时间段划分为n(n为大于等于1的正整数)个子时间段，每个子时间段包含m(m为大于等于1的正整数)个基本帧，映射规则规定m个基本帧中每个系统时钟周期的有效或无效，在有效系统时钟周期发送数据，在无效系统时钟周期不发送数据，子时间段之间采用相同的映射规则。
在CPRI线速率为1228.8Mbit/s的情况下，发送装置发送数据的数据顺序依照基本帧的数据结构(基本帧的结构为位于基本帧头部的1个控制字单元和剩余的15个数据单元)。以当前系统中CPRI数据传输位宽为16bit为例，发送装置按照映射规则只在第一个子时间段的有效系统时钟周期发送传输数据，故发送装置在第一个子时间段的第一个有效系统时钟周期发送的为第一个子时间段内第一个基本帧的控制字单元中的数据，第一个子时间段的第二个到第十六个有效系统时钟周期发送的为第一个子时间段内基本帧的数据单元的数据，第一个子时间段的在第十七个有效系统时钟周期发送的为第一个子时间段内第二个基本帧的控制字中的数据，就这样发送装置按照映射规则在第一个子时间段的有效系统时间周期发送数据，在第一个子时间段内的无效系统时钟周期不发送数据，依次将第一个子时间段的传输数据全部发送出去。第一个子时间段的传输数据中包括封装在第一个子时间段的CPRI控制字中的数据以及非控制字部分的数据。若n为大于1的整数，则当前时间段内的其他子时间段的传输数据按照与第一个子时间段相同的映射规则进行发送。
本发明实施例方法中封装在当前时间段的CPRI控制字保留字段中的 信息包含有以下三种情况：
第一种情况，发送装置只将参数信息封装到当前时间段的CPRI控制字保留字段中。
在这种情况下各时间段的传输数据的映射规则可以是通过高层协议进行约定固化的，即各时间段的传输数据的映射规则都是固定一样的，此时，发送装置将要发送的当前时间段的CPRI控制字保留字段中不需要封装下一个时间段的传输数据的映射规则，而是只封装参数信息。此时，发送装置发送的传输数据中没有映射规则。这样，接收装置按照当前时间段的传输数据的映射规则即固定的映射规则接收当前时间段的传输数据后，从所述当前时间段的CPRI控制字保留字段中获取的只有参数信息。
所述参数信息可以是当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。若所述参数信息是当前时间段的传输数据的参数信息，则接收装置在所述按照当前时间段的传输数据的映射规则接收当前时间段的传输数据之后，会根据当前时间段的传输数据的参数信息处理当前时间段的传输数据；若所述参数信息是下一时间段的传输数据的参数信息，则接收装置在接收到当前时间段的传输数据之后，会根据从上一时间段的CPRI控制字保留字段中获取的参数信息处理当前时间段的传输数据，此时第一个时间段的传输数据的参数信息可以是预先设定存储好的，发送装置和接收装置都清楚了解的，接收装置在接收到第一时间段的传输数据之后，会根据预先存储的第一个时间段的传输数据的参数信息处理第一个时间段的传输数据。
第二种情况，发送装置只将下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中。
在这种情况下各时间段的传输数据的映射规则可以是动态变化的，此时，发送装置会将下一个时间段的传输数据的映射规则封装到当前时间段 的CPRI控制字保留字段中。这样，接收装置会按照从上一个时间段的CPRI控制字保留字段中获取的映射规则接收当前时间段的传输数据，并从当前时间段的传输数据获取下一个时间段的传输数据的映射规则。
为了更清楚地说明此种情况，假设当前时间段为CPRI超帧F1，其传输数据D1的映射规则为Y1；上一个时间段为CPRI超帧F0，其传输数据D0的映射规则为Y0；下一个时间段为CPRI超帧F2，其传输数据为D2的映射规则为Y2。
发送装置将Y1封装在F0的CPRI控制字保留字段中，将Y2封装在F1的CPRI控制字保留字段中；接收装置接收到F0的D0时，会从F0的CPRI控制字保留字段中获取Y1；这样接收装置就会按照Y1来接收F1的D1，会从F1的CPRI控制字保留字段中获取的映射规则Y2。
此种情况下，第一个时间段的传输数据的映射规则是预先设定好的固定的映射规则，发送装置和接收装置都清楚了解该映射规则的内容。这样发送装置就可以按照预先设定好的固定的映射规则将第一个时间段的传输数据发送出去；接收装置在接收第一个时间段的传输数据时，可以按照预先设定好的固定的映射规则接收第一个时间段的传输数据。
这种情况下，针对参数信息，发送装置可以将参数信息封装到CPRI的数据字中进行发送。所述参数信息可以是当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。具体应用参考第一种情况中的描述。
第三种情况，发送装置将参数信息和下一个时间段的传输数据的映射规则都封装到当前时间段的CPRI控制字保留字段中。
这种情况下各时间段的传输数据的映射规则可以是动态变化的，所述参数信息可以是当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。具体应用可以参考第一种情况和第二种情况中的描述。
本发明实施例还提供一种数据传输方法，应用于接收装置一侧，如图3所示，本发明实施例方法的处理流程包括以下步骤：
步骤301、在当前时间段，按照当前时间段的传输数据的映射规则提取接收当前时间段的传输数据。
发送装置按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，即只在当前时间段中的有效系统时钟周期发送传输数据；具体请参考步骤102中的描述。此时，接收装置就需要按照当前时间段的传输数据的映射规则，只在映射规则规定的有效系统时钟周期内接收当前时间段的传输数据。
当前时间段中包含有若干CPRI超帧，其具体结构可以参考图2所示。一个CPRI超帧中包含有256个基本帧，每个CPRI基本帧中包含有一个控制字，故一个CPRI超帧内包含256个控制字。其中一个CPRI超帧中的控制字的保留字段为36个16bit。一个CPRI基本帧包含的数据字为15个16bit。
所述当前时间段的传输数据的结构就如图2所示，当前时间段包含有若干基本帧，每个基本帧中有一个控制字单元和15个数据单元，这些控制字单元和数据单元中的数据就是当前时间段的传输数据。
在CPRI线速率为1228.8Mbit/s的情况下，接收装置按照当前时间段的传输数据的映射规则依次在当前时间段的n个子时间段的有效系统时钟周期内接收数据，在当前时间段的第一个子时间段的第一个有效系统时钟周期内接收的为第一个子时间段内第一个基本帧的控制字单元中的数据，第二个到第十六个有效系统时钟周期内接收的为第一个子时间段内第一个基本帧的数据单元中的数据，第一个子时间段的在第十七个有效系统时钟周期内接收的为第一个子时间段内第二个基本帧的控制字单元中的数据，就这样依次将当前时间段内的第一个子时间段中的传输数据接收过来，组装成一个个的基本帧。若n为大于1的整数，则当前时间段内的其他子时间 段的传输数据按照与第一个子时间段相同的映射规则进行接收。
步骤302、根据所述当前时间段的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则。
所述当前时间段的传输数据中包括当前时间段的CPRI控制字(CPRI控制字中有保留字段)以及当前时间段的CPRI数据字中的数据。所述当前时间段的CPRI控制字保留字段中的数据包括参数信息和/或下一个时间段的传输数据的映射规则，当前时间段的CPRI数据字中的数据包括当前时间段传输的信息数据。步骤301中接收装置已按照当前时间段的传输数据的映射规则提取接收将当前时间段内的基本帧中的传输数据，接收装置可以将其还原组装成一个个的基本帧结构，从所述当前时间段内的基本帧中的CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则。当然也可以从其他控制字中获取发送装置传输的控制信息，从所述当前时间段内的基本帧中的CPRI数据字中获取传输的信息数据。
当所述当前时间段的CPRI控制字保留字段中只封装有参数信息时，接收装置应用的各时间段的传输数据的映射规则都是通过高层协议进行约定固化的，即各时间段的传输数据的映射规则都是固定一样的，这个固定的映射规则已预先存储在接收装置中，接收装置可以直接按照当前时间段的传输数据的映射规则即相同的固定的映射规则接收当前时间段的传输数据。
当所述当前时间段的CPRI控制字保留字段中封装有下一个时间段的传输数据的映射规则时，接收装置应用的各时间段的传输数据的映射规则是动态变化的，接收装置可以按照从上一个时间段的CPRI控制字保留字段中获取的映射规则即当前时间段的传输数据的映射规则，接收当前时间段的传输数据。此种情况下，第一个时间段的传输数据的映射规则是预先设 定好的固定的映射规则，发送装置和接收装置都清楚了解该映射规则的内容。这样接收装置在接收第一个时间段时，可以按照预先设定好的固定的映射规则接收当前时间段的传输数据。
本发明实施例方法所述的参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
在根据所述当前时间段的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则之后，所述方法还包括：
根据当前时间段的传输数据的参数信息处理当前时间段的传输数据；
其中，所述当前时间段的传输数据的参数信息为从当前时间段的CPRI控制字保留字段中获取的参数信息或从上一个时间段的CPRI控制字保留字段中获取的参数信息。
第一个时间段的传输数据的参数信息可以是预先设定存储好的，发送装置和接收装置都清楚了解的，接收装置在提取出当前时间段的传输数据之后，会根据预先存储的第一个时间段的传输数据的参数信息处理第一个时间段的传输数据。
本发明实施例方法通过将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中，充分利用当前时间段中的控制字保留字段，且将参数信息和/或映射规则封装到控制字保留字段中，与现有技术中的封装在数据字中进行传输相比，本发明实施例方法可以应用更多的数据字来传输更多的数据，提高数据传输效率。另外，本发明实施例方法可以将下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中，这样各时间段的传输数据的映射规则可以动态变化，增强了CPRI数据传输的灵活性。
实施例二
本发明实施例提供一种数据传输方法，如图4所示，本发明实施例方法的处理流程包括以下步骤：
步骤401、发送装置将参数信息和下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中。
该当前时间段可以是0.5个CPRI超帧，可以是1个CPRI超帧，也可以是多个CPRI超帧，本发明实施例中并不作限制。CPRI超帧的具体结构可以参考图2所示。
本发明实施例方法中，发送装置在应用CPRI进行数据传输时，发送装置会将参数信息和下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中。
所述参数信息可以是当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
步骤402、发送装置在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据。
发送装置会按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。当前时间段的CPRI控制字中的数据包括当前时间段的CPRI控制字保留字段中的数据，即封装到当前时间段的CPRI控制字保留字段中的参数信息和/或下一个时间段的传输数据的映射规则。当前时间段的非CPRI控制字中的数据包括发送装置需要发送的信息数据。
发送装置发送传输数据的过程如图2所示，一个基本帧为一个整体，发送装置会按照当前时间段的传输数据的映射规则将当前时间段的传输数据发送出去。这里所述的映射规则即，将当前时间段划分为n(n为大于等于1的正整数)个子时间段，每个子时间段包含m(m为大于等于1的正 整数)个基本帧，映射规则规定m个基本帧中每个系统时钟周期的有效或无效，在有效系统时钟周期发送数据，在无效系统时钟周期不发送数据，子时间段之间采用相同的映射规则。
在CPRI线速率为1228.8Mbit/s的情况下，发送装置发送数据的数据顺序依照基本帧的数据结构(基本帧的结构为位于基本帧头部的1个控制字单元和剩余的15个数据单元)。以当前系统中CPRI数据传输位宽为16bit为例，发送装置按照映射规则只在第一个子时间段的有效系统时钟周期发送传输数据，故发送装置在第一个子时间段的第一个有效系统时钟周期发送的为第一个子时间段内第一个基本帧的控制字单元中的数据，第一个子时间段的第二个到第十六个有效系统时钟周期发送的为第一个子时间段内基本帧的数据单元的数据，第一个子时间段的在第十七个有效系统时钟周期发送的为第一个子时间段内第二个基本帧的控制字中的数据，就这样发送装置按照映射规则在第一个子时间段的有效系统时间周期发送数据，在第一个子时间段内的无效系统时钟周期不发送数据，依次将第一个子时间段的传输数据全部发送出去。第一个子时间段的传输数据中包括封装在当前子时间段的CPRI控制字保留字段中的数据以及非控制字部分的数据。若n为大于1的整数，则当前时间段内的其他子时间段的传输数据按照与第一个子时间段相同的映射规则进行发送。
发送装置按照映射规则在当前时间段的有效系统时钟周期内发送数据，在当前时间段内的无效有效系统时钟周期内不发送数据，就这样将当前时间段的传输数据全部发送出去。当前时间段的传输数据中包括封装在当前时间段的CPRI控制字保留字段中的参数信息和/或下一个时间段的传输数据的映射规则。
步骤403、接收装置在当前时间段，按照当前时间段的传输数据的映射规则提取接收当前时间段的传输数据。
在步骤402中，发送装置按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，即只在当前时间段中的有效有效系统时钟周期发送传输数据；此时，接收装置就需要按照当前时间段的传输数据的映射规则，只在映射规则规定的有效系统时钟周期内接收当前时间段的传输数据。
在CPRI线速率为1228.8Mbit/s的情况下，接收装置按照当前时间段的传输数据的映射规则依次在当前时间段的的n个子时间段的有效系统时钟周期内接收数据，在当前时间段的第一个子时间段的第一个有效系统时钟周期内接收的为第一个子时间段内第一个基本帧的控制字单元中的数据，第二个到第十六个有效系统时钟周期内接收的为第一个子时间段内第一个基本帧的数据单元中的数据，第一个子时间段的在第十七个有效系统时钟周期内接收的为第一个子时间段内第二个基本帧的控制字单元中的数据，就这样依次将当前时间段内的第一个子时间段中的传输数据接收过来，组装成一个个的基本帧。若n为大于1的整数，则当前时间段内的其他子时间段的传输数据按照与第一个子时间段相同的映射规则进行接收。
步骤404、根据所述当前时间段的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和下一个时间段的传输数据的映射规则。
步骤403中接收装置已按照当前时间段的传输数据的映射规则提取接收将当前时间段内的基本帧中的传输数据，接收装置可以将其还原组装成一个个的基本帧结构，从所述当前时间段内的基本帧中的CPRI控制字保留字段中获取参数信息和下一个时间段的传输数据的映射规则。当然也可以从其他控制字中获取发送装置传输的控制信息，从所述当前时间段内的基本帧中的CPRI数据字中获取传输的信息数据。
当前时间段是第一个时间段时，第一个时间段的传输数据的映射规则是预先设定好的固定的映射规则，发送装置和接收装置都清楚了解该固定 的映射规则的内容。这样步骤402中发送装置就可以按照预先设定好的固定的映射规则将第一个时间段的传输数据发送出去；接收装置在接收第一个时间段的数据时，可以按照预先设定好的固定的映射规则接收第一个时间段的传输数据。此时，当前时间段的传输数据的映射规则为固定的映射规则。
当前时间段不是第一个时间段时，当前时间段的传输数据的映射规则可以从上一个时间段的CPRI控制字保留字段中获取。
步骤405、接收装置根据当前时间段的传输数据的参数信息处理当前时间段的传输数据。
步骤401中，发送装置封装到当前时间段的CPRI控制字保留字段中的参数信息可以是当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
若步骤401中发送装置是将当前时间段的传输数据的参数信息封装到当前时间段的CPRI控制字保留字段中，故接收装置在步骤404中从所述当前时间段的CPRI控制字保留字段中获取的参数信息为当前时间段的传输数据的参数信息，接收装置可以根据当前时间段的传输数据的参数信息处理当前时间段的传输数据。
若步骤401中发送装置是将下一时间段的传输数据的参数信息封装到当前时间段的CPRI控制字保留字段中，则接收装置从上一时间段的CPRI控制字保留字段中获取的参数信息为当前时间段的传输数据的参数信息，接收装置可以根据上一时间段的CPRI控制字保留字段中获取的参数信息即当前时间段的传输数据的参数信息处理当前时间段的传输数据。此时，第一个时间段的传输数据的参数信息可以是预先设定存储好的，发送装置和接收装置都清楚了解的，接收装置在提取出当前时间段的传输数据之后，会根据预先存储的第一个时间段的传输数据的参数信息处理第一个时间段 的传输数据。
在本发明实施例中以所述参数信息为当前时间段的传输数据的参数信息为例来进行描述。该参数信息包含但不限于数据包位置指示信息、数据包地址信息、数据包长度信息、数据包编号信息以及数据包校验信息(奇偶校验或循环冗余检查(CRC，Cyclic Redundancy Check)校验等)等。
在一示例中，假设本发明实施例中的一个时间段为一个超帧的时间段。如图5和图6所示，210是一个10ms时间段内的帧。220是一个CPRI超帧，每个10ms帧包含150个超帧，记为#0，…，#Z，…，#149。230是一个CPRI基本帧，每个超帧包含256个基本帧记为#0，…，#K，…，#255。
如图5所示，发送装置将参数信息和下一个时间段的传输数据的映射规则封装到当前时间段即CPRI超帧#Z的CPRI控制字保留字段260中。发送装置按照CPRI超帧#Z的传输数据的映射规则发送CPRI超帧#Z的传输数据，接收装置按照CPRI超帧#Z的传输数据的映射规则提取接收CPRI超帧#Z的传输数据。
如图6所示，接收装置在接收CPRI超帧#Z时，会按照从上一个时间段即CPRI超帧#Z-1的CPRI控制字保留字段中获取的映射规则270(当前时间段的传输数据的映射规则)，提取接收CPRI超帧#Z的传输数据。
如图6所示，270表示从CPRI超帧#Z-1中获取的映射规则，该映射规则为CPRI超帧#Z中的传输数据的映射规则，在本发明实施例中，将CPRI超帧#Z分为n＝256个子时间段，每个子时间包含m-1个基本帧，该映射规则规定m＝1个基本帧中每个系统时钟周期的有效或无效，此时，映射规则有k bit位与一个基本帧包含的k个系统时钟周期一一对应，映射规则字段中bit位为1表示对应的系统时钟周期为有效系统时钟周期，映射规则字段中bit位为0表示对应系统时钟周期为无效系统时钟周期。接收装置接收到CPRI超帧#Z时可以按照这个映射规则在每个基本帧有效系统时钟周期接 收CPRI超帧#Z中的传输数据。如图6所示，280表示一个基本帧中的k个系统时钟周期，270表示从CPRI超帧#Z-1中获取的映射规则，映射规则有k bit位与每个基本帧中的k个系统时钟周期一一对应，接收装置只提取接收映射规则字段为1对应的有效系统时钟周期内的传输数据。
接收装置在接收到CPRI超帧#Z后，可以在CPRI超帧#Z的CPRI控制字保留字段中提取和组合CPRI超帧#Z+1中传输数据的映射规则，以便在接收到CPRI超帧#Z+1后，应用该映射规则提取接收CPRI超帧#Z+1中传输数据。
实施例三
本发明实施例提供一种发送装置，如图7所示，所述发送装置包括：封装单元701、发送单元702，其中，
封装单元701，配置为将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中；
发送单元702，配置为在所述封装单元701封装完成当前时间段CPRI超帧的CPRI控制字保留字段后，在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。
所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
本发明实施例提供一种接收装置，如图8所示，所述接收装置包括：接收单元801、获取单元802，其中，
接收单元801，配置为在当前时间段，按照当前时间段的传输数据的映射规则接收当前时间段的传输数据；
获取单元802，配置为根据所述接收单元801接收到的所述当前时间段 的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则；其中，所述当前时间段的传输数据的映射规则为固定的映射规则或从上一个时间段的CPRI控制字保留字段中获取的映射规则。
所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
如图8所示，所述接收装置还包括处理单元803，其中，
所述处理单元803，配置为根据当前时间段的传输数据的参数信息处理所述接收单元801接收到的当前时间段的传输数据；
其中，所述当前时间段的传输数据的参数信息为从当前时间段的CPRI控制字保留字段中获取的参数信息或从上一个时间段的CPRI控制字保留字段中获取的参数信息。
在实际应用中，所述封装单元701、发送单元702可以由位于发送装置上的中央处理器(CPU，Central Processing Unit)、微处理器(MPU，Micro Processor Unit)、数字信号处理器(DSP，Digital Signal Processor)或现场可编程门阵列(FPGA，Field－Programmable Gate Array)等器件实现。所述接收单元801、获取单元802、处理单元803可以由位于接收装置上的CPU、MPU、DSP或FPGA等器件实现。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程 图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。
工业实用性
本发明实施例中，将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中，充分利用当前时间段中的控制字保留字段，且将参数信息和/或映射规则封装到控制字保留字段中，与现有技术中的封装在数据字中进行传输相比，本发明实施例方法可以应用更多的数据字来传输更多的数据，提高数据传输效率。另外，本发明实施例可以将下一个时间段的传输数据的映射规则封装到当前时间段的CPRI控制字保留字段中，这样各个时间段的传输数据的映射规则可以动态变化， 从而增强CPRI数据传输的灵活性。

Claims (12)

  1. 一种数据传输方法，所述方法包括：
    将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的通用公共无线接口CPRI控制字保留字段中；
    在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。
  2. 根据权利要求1所述的方法，其中，所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
  3. 一种数据传输方法，所述方法包括：
    在当前时间段，按照当前时间段的传输数据的映射规则提取接收当前时间段的传输数据；
    根据所述当前时间段的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则；
    其中，所述当前时间段的传输数据的映射规则为固定的映射规则或从上一个时间段的CPRI控制字保留字段中获取的映射规则。
  4. 根据权利要求3所述的方法，其中，所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
  5. 根据权利要求4所述的方法，其中，在从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则之后，所述方法还包括：
    根据当前时间段的传输数据的参数信息处理当前时间段的传输数据；
    其中，所述当前时间段的传输数据的参数信息为从当前时间段的CPRI控制字保留字段中获取的参数信息或从上一个时间段的CPRI控制字保留 字段中获取的参数信息。
  6. 一种发送装置，所述发送装置包括：
    封装单元，配置为将参数信息和/或下一个时间段的传输数据的映射规则封装到当前时间段的通用公共无线接口CPRI控制字保留字段中；
    发送单元，配置为在所述封装单元封装完成当前时间段的CPRI控制字保留字段后，在当前时间段，按照当前时间段的传输数据的映射规则发送当前时间段的传输数据，所述当前时间段的传输数据包括当前时间段的CPRI控制字中的数据以及当前时间段的非CPRI控制字中的数据。
  7. 根据权利要求1所述的发送装置，其中，所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
  8. 一种接收装置，所述接收装置包括：
    接收单元，配置为在当前时间段，按照当前时间段的传输数据的映射规则接收当前时间段的传输数据；
    获取单元，配置为根据所述接收单元接收到的所述当前时间段的传输数据，从所述当前时间段的通用公共无线接口CPRI控制字保留字段中获取参数信息和/或下一个时间段的传输数据的映射规则；
    其中，所述当前时间段的传输数据的映射规则为固定的映射规则或从上一个时间段的CPRI控制字保留字段中获取的映射规则。
  9. 根据权利要求8所述的接收装置，其中，所述参数信息包括：当前时间段的传输数据的参数信息或下一个时间段的传输数据的参数信息。
  10. 根据权利要求9所述的接收装置，其中，所述接收装置还包括处理单元，
    所述处理单元，配置为根据当前时间段的传输数据的参数信息处理所述接收单元接收到的当前时间段的传输数据；
    其中，所述当前时间段的传输数据的参数信息为从当前时间段的CPRI 控制字保留字段中获取的参数信息或从上一个时间段的CPRI控制字保留字段中获取的参数信息。
  11. 一种计算机可读介质，所述计算机可读介质中存储有可执行指令，所述可执行指令用于执行权利要求1或2所述的数据传输方法。
  12. 一种计算机可读介质，所述计算机可读介质中存储有可执行指令，所述可执行指令用于执行权利要求3至5任一项所述的数据传输方法。
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