CN104506282A - Data transmission method, data transmission device and base station - Google Patents
Data transmission method, data transmission device and base station Download PDFInfo
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- CN104506282A CN104506282A CN201510030231.1A CN201510030231A CN104506282A CN 104506282 A CN104506282 A CN 104506282A CN 201510030231 A CN201510030231 A CN 201510030231A CN 104506282 A CN104506282 A CN 104506282A
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- cqi
- mcs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
Abstract
The invention provides a data transmission method, a data transmission device and a base station. The data transmission method includes the steps: informing a terminal of transmitting data in a specific MCS (modulation and coding scheme); informing the terminal of selecting an MCS/CQI (channel quality indicator)/TBS (transport block size) form corresponding to a 256QAM when the specific MCS is the 256QAM to transmit the data, otherwise, informing the terminal of selecting an original MCS/CQI/TBS form for transmitting the data. By the aid of the technical scheme, the terminal can accurately select the used MCS/CQI/TBS form according to different modulation coding modes, so that the data are smoothly transmitted.
Description
Technical field
The present invention relates to wireless communication technology field, in particular to a kind of data transmission method, a kind of data transmission device and a kind of base station.
Background technology
The discussion for small cell (small-cell) is introduced in the standardized process of lte-a system.Typical deployed scene due to small cell is indoor or short-range covering, and the link-quality between service node and terminal is better, and traditional modulation system can not meet the demands.In order to further improve spectrum efficiency, introduce the modulation system of 256QAM.
But, introduce 256QAM and can produce certain impact to current agreement.Such as determine at present and needed to introduce new MCS/CQI/TBS form to indicate 256QAM, made to there is the new form corresponding to 256QAM and the old form corresponding to original modulation coding mode simultaneously.
Therefore, how notification terminal uses existing in current agreement or the form of new introducing, becomes technical problem urgently to be resolved hurrily at present.
Summary of the invention
The present invention, just based on the problems referred to above, proposes a kind of new technical scheme, for different modulation coding modes, can make the MCS/CQI/TBS form of the accurate choice for use of terminal, thus realize transfer of data smoothly.
In view of this, the present invention proposes a kind of data transmission method, comprising: notification terminal adopts specific MCS mode to carry out transfer of data; And, when described specific MCS mode is 256QAM, notify that described terminal selects to correspond to MCS (the Modulation and CodingScheme of 256QAM, modulation coding mode)/CQI (Channel Quality Indicator, link-quality indicates)/TBS (Transport Block Size, transmission block size) form, for described transfer of data, otherwise notify that described terminal selects original MCS/CQI/TBS form, for described transfer of data.
In this technical scheme, because 256QAM corresponds respectively to different MCS/CQI/TBS forms from other modulation coding modes original, thus by when the MCS mode of notification terminal employing, also the MCS/CQI/TBS form of use is informed terminal, make terminal that correct MCS/CQI/TBS form can be used to realize, to the modulating-coding of transmission data, avoiding the MCS/CQI/TBS form of mistake in.
Certainly, it will be understood by those skilled in the art that any modulation coding mode for may occur in the future, if desired define new MCS/CQI/TBS form, then all can realize accurately informing to terminal by the way, to avoid the MCS/CQI/TBS form of mistake in.
In technique scheme, preferably, notify that the process that described terminal carries out the selection of form comprises: notify that described terminal adopts specific transmission mode to carry out described transfer of data; Wherein, when notifying that described terminal adopts the main transmission mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when notifying that described terminal adopts the fall-back mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs to select original MCS/CQI/TBS form.
In this technical scheme, utilize transmission mode (TM, Transmission Mode) the main transmission mode that defines and fall-back mode, 256QAM and other modulation coding modes original are divided into two classifications, and MCS/CQI/TBS form corresponding with 256QAM, 256QAM for main transmission mode is associated, and fall-back mode is associated with original modulation coding mode, original MCS/CQI/TBS form, thus clearly can adopt correct MCS/CQI/TBS form by notification terminal, and contribute to reducing signaling consumption.
In technique scheme, preferably, described specific transmission mode comprises: arbitrary transmission mode that described terminal is supported; Or only by the transmission mode of the terminal-specific of support 256QAM.
In this technical scheme, as one comparatively preferred embodiment, existing all transmission modes, comprise TM1 ~ TM10, all may be used for the corresponding form types of terminal notification, thus can either accurately informing form types be realized, the change to existing protocol can be avoided again.
As another kind comparatively preferred embodiment, special transmission mode can be defined for 256QAM, such as be defined as TM11, make to manage respectively the TM11 of original agreement and new definition, avoid causing too much change to TM1 ~ TM10.
In technique scheme, preferably, notify that the process that described terminal carries out the selection of form comprises: when described specific MCS mode is 256QAM, adopt First ray to carry out scrambling to corresponding Downlink Control Information, otherwise adopt the corresponding Downlink Control Information of the second sequence pair to carry out scrambling.
In this technical scheme, when adopting different modulation coding modes, i.e. 256QAM or original modulation coding mode, corresponding different sequence pair Downlink Control Information (DCI can be adopted, Downlink Control Information) carry out scrambling, terminal according to the sequence used during descrambling, can be recognized the modulation coding mode of current employing and corresponding MCS/CQI/TBS form, contributes to reducing signaling consumption.
In technique scheme, preferably, notify that the process that described terminal carries out the selection of form comprises: generating messages frame, form types mark is comprised in described message frame, when described form types is designated the first value, represent that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when described form types is designated the second value, represent that described terminal needs to select original MCS/CQI/TBS form; Described message frame is sent to described terminal.
In this technical scheme, can message frame be passed through, inform the MCS/CQI/TBS form adopted required for it directly to terminal, thus help avoid the message misinformation that other modes may cause and reach.
In technique scheme, preferably, described message frame is RRC signaling or MAC signaling.Certainly, what those skilled in the art should understand that is, obviously can by the signaling of arbitrary form, all can realize the messages meant of above-mentioned form types, such as can be passed on by physical layer signaling, and when the numerical value making this physical layer signaling is the first value, show that terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, and when the numerical value of this physical layer signaling is the second value, show that terminal needs to select original MCS/CQI/TBS form.
In technique scheme, preferably, also comprise: when described specific MCS mode is 256QAM, the bit quantity of expansion CQI reporting information.
In this technical scheme, when CQI reporting information is subband CQI reporting information, during owing to adopting the modulation coding mode of 256QAM or more high-order, SNR (signal to noise ratio) interval may be widened, thus make the precision of the offset value (side-play amount) comprised in original subband CQI reporting information inadequate, thus by increasing bit quantity, contribute to providing more offset value, thus improve the precision of offset value, make base station can realize dispatching more accurately, elevator system performance.
Certainly, CQI reporting information also can be other types, it is such as broadband CQI reporting information, then by increasing bit quantity, contribute to the broadband CQI value more accurately indicating broadband CQI information or the corresponding larger SNR scope of instruction reported, such base station can obtain CQI information more accurately, elevator system performance.
In technique scheme, preferably, the described CQI reporting information after expansion comprises 3 bits.
In this technical scheme, comparatively particularly, the CQI reporting information of current 2 bits can be expanded to 3 bits, thus the offset value of script 4 grades (level) is extended to 8 grades, to realize base station scheduling more accurately.Certainly, it will be understood by those skilled in the art that the concrete bit for CQI reporting information, can adjust as required, as by extending to larger bit, contributing to comprising more transmission information, and realize base station scheduling more accurately.
In technique scheme, preferably, described CQI reporting information is sub-band CQI information.
The invention allows for a kind of data transmission device, comprising: modulation coding mode notification unit, adopt specific MCS mode to carry out transfer of data for notification terminal; Form types notification unit, for when described specific MCS mode is 256QAM, notify that described terminal selects to correspond to the MCS/CQI/TBS form of 256QAM, for described transfer of data, otherwise notify that described terminal selects original MCS/CQI/TBS form, for described transfer of data.
In this technical scheme, because 256QAM corresponds respectively to different MCS/CQI/TBS forms from other modulation coding modes original, thus by when the MCS mode of notification terminal employing, also the MCS/CQI/TBS form of use is informed terminal, make terminal that correct MCS/CQI/TBS form can be used to realize, to the modulating-coding of transmission data, avoiding the MCS/CQI/TBS form of mistake in.
Certainly, it will be understood by those skilled in the art that any modulation coding mode for may occur in the future, if desired define new MCS/CQI/TBS form, then all can realize accurately informing to terminal by the way, to avoid the MCS/CQI/TBS form of mistake in.
In technique scheme, preferably, described form types notification unit comprises: transmission mode notice subelement, for notifying that described terminal adopts specific transmission mode to carry out described transfer of data; Wherein, when notifying that described terminal adopts the main transmission mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when notifying that described terminal adopts the fall-back mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs to select original MCS/CQI/TBS form.
In this technical scheme, utilize transmission mode (TM, Transmission Mode) the main transmission mode that defines and fall-back mode, 256QAM and other modulation coding modes original are divided into two classifications, and MCS/CQI/TBS form corresponding with 256QAM, 256QAM for main transmission mode is associated, and fall-back mode is associated with original modulation coding mode, original MCS/CQI/TBS form, thus clearly can adopt correct MCS/CQI/TBS form by notification terminal, and contribute to reducing signaling consumption.
In technique scheme, preferably, described specific transmission mode comprises: arbitrary transmission mode that described terminal is supported; Or only by the transmission mode of the terminal-specific of support 256QAM.
In this technical scheme, as one comparatively preferred embodiment, existing all transmission modes, comprise TM1 ~ TM10, all may be used for the corresponding form types of terminal notification, thus can either accurately informing form types be realized, the change to existing protocol can be avoided again.
As another kind comparatively preferred embodiment, special transmission mode can be defined for 256QAM, such as be defined as TM11, make to manage respectively the TM11 of original agreement and new definition, avoid causing too much change to TM1 ~ TM10.
In technique scheme, preferably, described form types notification unit comprises: scrambling subelement, for when described specific MCS mode is 256QAM, adopt First ray to carry out scrambling to corresponding Downlink Control Information, otherwise adopt the corresponding Downlink Control Information of the second sequence pair to carry out scrambling.
In this technical scheme, when adopting different modulation coding modes, i.e. 256QAM or original modulation coding mode, corresponding different sequence pair Downlink Control Information (DCI can be adopted, Downlink Control Information) carry out scrambling, terminal according to the sequence used during descrambling, can be recognized the modulation coding mode of current employing and corresponding MCS/CQI/TBS form, contributes to reducing signaling consumption.
In technique scheme, preferably, described form types notification unit comprises: message frame generates subelement, for generating messages frame, comprise form types mark in described message frame, when described form types is designated the first value, represent that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when described form types is designated the second value, represent that described terminal needs to select original MCS/CQI/TBS form; Message frame sends subelement, for sending described message frame to described terminal.
In this technical scheme, can message frame be passed through, inform the MCS/CQI/TBS form adopted required for it directly to terminal, thus help avoid the message misinformation that other modes may cause and reach.
In technique scheme, preferably, described message frame is RRC signaling or MAC signaling.Certainly, what those skilled in the art should understand that is, obviously can by the signaling of arbitrary form, all can realize the messages meant of above-mentioned form types, such as can be passed on by physical layer signaling, and when the numerical value making this physical layer signaling is the first value, show that terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, and when the numerical value of this physical layer signaling is the second value, show that terminal needs to select original MCS/CQI/TBS form.
In technique scheme, preferably, also comprise: Information expansion unit, for when described specific MCS mode is 256QAM, the bit quantity of expansion CQI reporting information.
In this technical scheme, when CQI reporting information is subband CQI reporting information, during owing to adopting the modulation coding mode of 256QAM or more high-order, SNR (signal to noise ratio) interval may be widened, thus make the precision of the offset value (side-play amount) comprised in original subband CQI reporting information inadequate, thus by increasing bit quantity, contribute to providing more offset value, thus improve the precision of offset value, make base station can realize dispatching more accurately, elevator system performance.
Certainly, CQI reporting information also can be other types, it is such as broadband CQI reporting information, then by increasing bit quantity, contribute to the broadband CQI value more accurately indicating broadband CQI information or the corresponding larger SNR scope of instruction reported, such base station can obtain CQI information more accurately, elevator system performance.
In technique scheme, preferably, the described CQI reporting information after expansion comprises 3 bits.
In this technical scheme, comparatively particularly, the CQI reporting information of current 2 bits can be expanded to 3 bits, thus the offset value of script 4 grades (level) is extended to 8 grades, to realize base station scheduling more accurately.Certainly, it will be understood by those skilled in the art that the concrete bit for CQI reporting information, can adjust as required, as by extending to larger bit, contributing to comprising more transmission information, and realize base station scheduling more accurately.
In technique scheme, preferably, described CQI reporting information is sub-band CQI information.
The invention allows for a kind of base station, comprising: the data transmission device according to any one of technique scheme.
By above technical scheme, for different modulation coding modes, the MCS/CQI/TBS form of the accurate choice for use of terminal can be made, thus realizes transfer of data smoothly.
Accompanying drawing explanation
Fig. 1 shows the schematic flow diagram of data transmission method according to an embodiment of the invention;
Fig. 2 shows according to an embodiment of the invention implicitly to the schematic flow diagram of terminal notification form types;
Fig. 3 show according to another embodiment of the invention implicitly to the schematic flow diagram of terminal notification form types;
Fig. 4 shows the schematic flow diagram of explicitly according to an embodiment of the invention to terminal notification form types;
Fig. 5 shows the schematic block diagram of data transmission device according to an embodiment of the invention;
Fig. 6 shows the schematic block diagram of base station according to an embodiment of the invention.
Embodiment
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Fig. 1 shows the schematic flow diagram of data transmission method according to an embodiment of the invention.
As shown in Figure 1, data transmission method according to an embodiment of the invention, comprising:
Step 102, notification terminal adopts specific MCS mode to carry out transfer of data;
Step 104, when described specific MCS mode is 256QAM, notify that described terminal selects to correspond to MCS (the Modulation and Coding Scheme of 256QAM, modulation coding mode)/CQI (Channel Quality Indicator, link-quality indicates)/TBS (TransportBlock Size, transmission block size) form, for described transfer of data, otherwise notify that described terminal selects original MCS/CQI/TBS form, for described transfer of data.
In this technical scheme, because 256QAM corresponds respectively to different MCS/CQI/TBS forms from other modulation coding modes original, thus by when the MCS mode of notification terminal employing, also the MCS/CQI/TBS form of use is informed terminal, make terminal that correct MCS/CQI/TBS form can be used to realize, to the modulating-coding of transmission data, avoiding the MCS/CQI/TBS form of mistake in.
Certainly, it will be understood by those skilled in the art that any modulation coding mode for may occur in the future, if desired define new MCS/CQI/TBS form, then all can realize accurately informing to terminal by the way, to avoid the MCS/CQI/TBS form of mistake in.
Inform to adopt which kind of MCS/CQI/TBS form, in fact there is a variety of implementation for concrete to terminal, below for wherein several comparatively typical technological means, its concrete technical scheme is described in detail.
Embodiment one: by the method for implicit expression
Execution mode one
Fig. 2 shows according to an embodiment of the invention implicitly to the schematic flow diagram of terminal notification form types.
As shown in Figure 2, according to an embodiment of the invention implicitly in the method for terminal notification form types, notify that the process that described terminal carries out the selection of form comprises:
Step 202, notifies that described terminal adopts specific transmission mode to carry out described transfer of data.
Whether step 204, judges in above-mentioned specific transmission mode, be specifically adopt main transmission mode, if so, then enter step 206, otherwise enter step 208.
Step 206, according to main transmission mode, then shows that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM.
Step 208, according to fall-back mode, then shows that described terminal needs to select original MCS/CQI/TBS form.
In this technical scheme, utilize transmission mode (TM, Transmission Mode) the main transmission mode that defines and fall-back mode, 256QAM and other modulation coding modes original are divided into two classifications, and MCS/CQI/TBS form corresponding with 256QAM, 256QAM for main transmission mode is associated, and fall-back mode is associated with original modulation coding mode, original MCS/CQI/TBS form, thus clearly can adopt correct MCS/CQI/TBS form by notification terminal, and contribute to reducing signaling consumption.Wherein, main transmission mode represents that corresponding transfer of data supports 256QAM modulation system, and fall-back mode represents that corresponding transfer of data does not support 256AQM modulation system.
Particularly, based on the mode of above-mentioned transmission mode, two kinds of situations specifically can also be divided into:
1, based on existing transmission mode
In the related, defined 10 kinds of transmission modes, be designated as TM1 ~ TM10.In above-mentioned transmission mode, often kind of transmission mode all has main transmission mode and fall-back mode.
Therefore, the definition for above-mentioned 10 kinds of transmission modes in existing protocol can be utilized, namely for any one or multiple existing transmission mode, make it: under main transmission mode, corresponding to 256QAM and corresponding new MCS/CQI/TBS form; And under fall-back mode, corresponding to original modulation coding mode and corresponding original MCS/CQI/TBS form.
By the definition to original transmission mode, make to realize accurately informing form types, the change to existing protocol can be avoided again.
2, based on dedicated transmissions pattern
As another kind of embodiment, special transmission mode can be defined for 256QAM, such as be defined as TM11.Particularly, as shown in table 1, be under a kind of concrete preferred implementation, for the definition of above-mentioned dedicated transmissions pattern T11.
Table 1
By the transmission mode that definition 256QAM is special, make to manage respectively the TM11 of original agreement and new definition, avoid causing too much change to TM1 ~ TM10.
Execution mode two
Fig. 3 show according to another embodiment of the invention implicitly to the schematic flow diagram of terminal notification form types.
As shown in Figure 3, implicitly comprising to the process of terminal notification form types according to another embodiment of the invention:
Step 302, judges whether the specific MCS mode needing terminal to adopt is 256QAM, if so, then enters step 304, otherwise enters step 306.
Step 304, if desired terminal adopts 256QAM mode, then adopt First ray to carry out scrambling to corresponding Downlink Control Information.
Step 306, if desired terminal adopts original modulation coding mode, then adopt the corresponding Downlink Control Information of the second sequence pair to carry out scrambling.
In this technical scheme, when adopting different modulation coding modes, i.e. 256QAM or original modulation coding mode, corresponding different sequence pair Downlink Control Information (DCI can be adopted, Downlink Control Information) carry out scrambling, terminal according to the sequence used during descrambling, can be recognized the modulation coding mode of current employing and corresponding MCS/CQI/TBS form, contributes to reducing signaling consumption.
Certainly, it will be understood by those skilled in the art that the modulation coding mode for other more high-orders that may occur later, obviously also can by adopting corresponding sequence, to distinguish over the MCS/CQI/TBS form of other modulation coding modes and correspondence thereof.
It is to be noted: when informing adopted MCS/CQI/TBS form by the mode of scrambling to terminal, because terminal accurately must understand the scramble sequence corresponding to dissimilar MCS/CQI/TBS form, thus, for base station, its process has higher controllability.
Particularly, if terminal can correctly demodulate the DCI received, illustrate that terminal has understood corresponding control mode; And if terminal correctly cannot demodulate the DCI received, base station can recognize that this terminal does not have the service condition of correct understanding for dissimilar form, thus can perform corresponding process further.
Embodiment two: by explicit mode
Fig. 4 shows the schematic flow diagram of explicitly according to an embodiment of the invention to terminal notification form types.
As shown in Figure 4, explicitly according to an embodiment of the invention comprises to the process of terminal notification form types:
Step 402, generating messages frame, form types mark is comprised in described message frame, when described form types is designated the first value, represent that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when described form types is designated the second value, represent that described terminal needs to select original MCS/CQI/TBS form;
Step 404, sends described message frame to described terminal.
In this technical scheme, can message frame be passed through, inform the MCS/CQI/TBS form adopted required for it directly to terminal, thus help avoid the message misinformation that other modes may cause and reach.
In technique scheme, preferably, described message frame is RRC signaling or MAC signaling.
Such as RRC signaling, in order to distinguish the MCS/CQI/TBS form that 256QAM and original modulation coding mode adopt, then the specific implementation method being undertaken notifying by RRC signaling can be:
Therefore, when the numerical value in above-mentioned RRC signaling corresponds to " normal ", show that corresponding MCS/CQI/TBS form is for corresponding to original modulation coding mode, and when numerical value corresponds to " extended ", show that corresponding MCS/CQI/TBS form corresponds to 256QAM, thus accurately can inform the required MCS/CQI/TBS form adopted of terminal.
Certainly, what those skilled in the art should understand that is, obviously can by the signaling of arbitrary form, all can realize the messages meant of above-mentioned form types, such as can be passed on by physical layer signaling, and when making the numerical value of this physical layer signaling be the first value (being such as 0), show that terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, and when the numerical value of this physical layer signaling is the second value (being such as 1), show that terminal needs to select original MCS/CQI/TBS form.
In addition, owing to introducing the modulation coding mode of 256QAM or more high-order, SNR (signal to noise ratio) interval may be widened, thus make the precision of the offset value (side-play amount) comprised in original subband CQI reporting information inadequate.In order to solve the problem, the present invention, on the basis of the technical scheme of each above-mentioned notice form types, also further provides following technical proposals:
In above-mentioned arbitrary technical scheme, preferably, also comprise: when described specific MCS mode is 256QAM the modulation coding mode of high-order (or more), the bit quantity of expansion CQI reporting information.
In this technical scheme, by increasing bit quantity, contribute to providing more offset value, thus improve the precision of offset value, make base station can realize dispatching more accurately, elevator system performance.
Table 2
As shown in table 2, when carrying out modulating-coding for adopting 256QAM, assuming that after bit is extended to 3, corresponding relation between the subband CQI reporting information value obtained and offset level, it can make the offset value of 4 grades (level) originally extend to 8 grades, to realize base station scheduling more accurately.Certainly, what those skilled in the art should understand that is, for the concrete bit of CQI reporting information, can adjust as required, as by extending to larger bit or adjusting each bit to fixed offset level, contribute to comprising more transmission information, and realize base station scheduling more accurately.
In addition, CQI reporting information also can be other types, it is such as broadband CQI reporting information, then by increasing bit quantity, contribute to the broadband CQI value more accurately indicating broadband CQI information or the corresponding larger SNR scope of instruction reported, such base station can obtain CQI information more accurately, elevator system performance.
Fig. 5 shows the schematic block diagram of data transmission device according to an embodiment of the invention.
As shown in Figure 5, data transmission device 500 according to an embodiment of the invention, comprising: modulation coding mode notification unit 502, adopts specific MCS mode to carry out transfer of data for notification terminal; Form types notification unit 504, for when described specific MCS mode is 256QAM, notify that described terminal selects to correspond to the MCS/CQI/TBS form of 256QAM, for described transfer of data, otherwise notify that described terminal selects original MCS/CQI/TBS form, for described transfer of data.
In this technical scheme, because 256QAM corresponds respectively to different MCS/CQI/TBS forms from other modulation coding modes original, thus by when the MCS mode of notification terminal employing, also the MCS/CQI/TBS form of use is informed terminal, make terminal that correct MCS/CQI/TBS form can be used to realize, to the modulating-coding of transmission data, avoiding the MCS/CQI/TBS form of mistake in.
Certainly, it will be understood by those skilled in the art that any modulation coding mode for may occur in the future, if desired define new MCS/CQI/TBS form, then all can realize accurately informing to terminal by the way, to avoid the MCS/CQI/TBS form of mistake in.
In technique scheme, preferably, described form types notification unit 504 comprises: transmission mode notice subelement 5042, for notifying that described terminal adopts specific transmission mode to carry out described transfer of data; Wherein, when notifying that described terminal adopts the main transmission mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when notifying that described terminal adopts the fall-back mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs to select original MCS/CQI/TBS form.
In this technical scheme, utilize transmission mode (TM, Transmission Mode) the main transmission mode that defines and fall-back mode, 256QAM and other modulation coding modes original are divided into two classifications, and MCS/CQI/TBS form corresponding with 256QAM, 256QAM for main transmission mode is associated, and fall-back mode is associated with original modulation coding mode, original MCS/CQI/TBS form, thus clearly can adopt correct MCS/CQI/TBS form by notification terminal, and contribute to reducing signaling consumption.
In technique scheme, preferably, described specific transmission mode comprises: arbitrary transmission mode that described terminal is supported; Or only by the transmission mode of the terminal-specific of support 256QAM.
In this technical scheme, as one comparatively preferred embodiment, existing all transmission modes, comprise TM1 ~ TM10, all may be used for the corresponding form types of terminal notification, thus can either accurately informing form types be realized, the change to existing protocol can be avoided again.
As another kind comparatively preferred embodiment, special transmission mode can be defined for 256QAM, such as be defined as TM11, make to manage respectively the TM11 of original agreement and new definition, avoid causing too much change to TM1 ~ TM10.
In technique scheme, preferably, described form types notification unit 504 comprises: scrambling subelement 5044, for when described specific MCS mode is 256QAM, adopt First ray to carry out scrambling to corresponding Downlink Control Information, otherwise adopt the corresponding Downlink Control Information of the second sequence pair to carry out scrambling.
In this technical scheme, when adopting different modulation coding modes, i.e. 256QAM or original modulation coding mode, corresponding different sequence pair Downlink Control Information (DCI can be adopted, Downlink Control Information) carry out scrambling, terminal according to the sequence used during descrambling, can be recognized the modulation coding mode of current employing and corresponding MCS/CQI/TBS form, contributes to reducing signaling consumption.
In technique scheme, preferably, described form types notification unit 504 comprises: message frame generates subelement 5046, for generating messages frame, comprise form types mark in described message frame, when described form types is designated the first value, represent that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when described form types is designated the second value, represent that described terminal needs to select original MCS/CQI/TBS form; Message frame sends subelement 5048, for sending described message frame to described terminal.
In this technical scheme, can message frame be passed through, inform the MCS/CQI/TBS form adopted required for it directly to terminal, thus help avoid the message misinformation that other modes may cause and reach.
In technique scheme, preferably, described message frame is RRC signaling or MAC signaling.Certainly, what those skilled in the art should understand that is, obviously can by the signaling of arbitrary form, all can realize the messages meant of above-mentioned form types, such as can be passed on by physical layer signaling, and when the numerical value making this physical layer signaling is the first value, show that terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, and when the numerical value of this physical layer signaling is the second value, show that terminal needs to select original MCS/CQI/TBS form.
In technique scheme, preferably, also comprise: Information expansion unit 506, for when described specific MCS mode is 256QAM, the bit quantity of expansion CQI reporting information.
In this technical scheme, when CQI reporting information is subband CQI reporting information, during owing to adopting the modulation coding mode of 256QAM or more high-order, SNR (signal to noise ratio) interval may be widened, thus make the precision of the offset value (side-play amount) comprised in original subband CQI reporting information inadequate, thus by increasing bit quantity, contribute to providing more offset value, thus improve the precision of offset value, make base station can realize dispatching more accurately, elevator system performance.
Certainly, CQI reporting information also can be other types, it is such as broadband CQI reporting information, then by increasing bit quantity, contribute to the broadband CQI value more accurately indicating broadband CQI information or the corresponding larger SNR scope of instruction reported, such base station can obtain CQI information more accurately, elevator system performance.
In technique scheme, preferably, the described CQI reporting information after expansion comprises 3 bits.
In this technical scheme, comparatively particularly, the CQI reporting information of current 2 bits can be expanded to 3 bits, thus the offset value of script 4 grades (level) is extended to 8 grades, to realize base station scheduling more accurately.Certainly, it will be understood by those skilled in the art that the concrete bit for CQI reporting information, can adjust as required, as by extending to larger bit, contributing to comprising more transmission information, and realize base station scheduling more accurately.
In technique scheme, preferably, described CQI reporting information is sub-band CQI information.
Fig. 6 shows the schematic block diagram of base station according to an embodiment of the invention.
As shown in Figure 6, base station 600 according to an embodiment of the invention, comprises data transmission device 500 as shown in Figure 5.
More than be described with reference to the accompanying drawings technical scheme of the present invention, the present invention proposes a kind of data transmission method, a kind of data transmission device and a kind of base station, can for different modulation coding modes, make the MCS/CQI/TBS form of the accurate choice for use of terminal, thus realize transfer of data smoothly.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (21)
1. a data transmission method, is characterized in that, comprising:
Notification terminal adopts specific MCS mode to carry out transfer of data; And
When described specific MCS mode is 256QAM, notifies that described terminal selects to correspond to the MCS/CQI/TBS form of 256QAM, for described transfer of data, otherwise notify that described terminal selects original MCS/CQI/TBS form, for described transfer of data.
2. data transmission method according to claim 1, is characterized in that, notifies that the process that described terminal carries out the selection of form comprises:
Notify that described terminal adopts specific transmission mode to carry out described transfer of data;
Wherein, when notifying that described terminal adopts the main transmission mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when notifying that described terminal adopts the fall-back mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs to select original MCS/CQI/TBS form.
3. data transmission method according to claim 2, is characterized in that, described main transmission mode represents that corresponding transfer of data supports 256QAM modulation system, and described fall-back mode represents that corresponding transfer of data does not support 256AQM modulation system.
4. data transmission method according to claim 2, is characterized in that, described specific transmission mode comprises:
Arbitrary transmission mode that described terminal is supported;
Or only by the transmission mode of the terminal-specific of support 256QAM.
5. data transmission method according to claim 1, is characterized in that, notifies that the process that described terminal carries out the selection of form comprises:
When described specific MCS mode is 256QAM, adopt First ray to carry out scrambling to corresponding Downlink Control Information, otherwise adopt the corresponding Downlink Control Information of the second sequence pair to carry out scrambling.
6. data transmission method according to claim 1, is characterized in that, notifies that the process that described terminal carries out the selection of form comprises:
Generating messages frame, form types mark is comprised in described message frame, when described form types is designated the first value, represent that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when described form types is designated the second value, represent that described terminal needs to select original MCS/CQI/TBS form;
Described message frame is sent to described terminal.
7. data transmission method according to claim 6, is characterized in that, described message frame is RRC signaling or MAC signaling.
8. data transmission method according to any one of claim 1 to 7, is characterized in that, also comprises:
When described specific MCS mode is 256QAM, the bit quantity of expansion CQI reporting information.
9. data transmission method according to claim 8, is characterized in that, the described CQI reporting information after expansion comprises 3 bits.
10. data transmission method according to claim 8, is characterized in that, described CQI reporting information is sub-band CQI information.
11. 1 kinds of data transmission devices, is characterized in that, comprising:
Modulation coding mode notification unit, adopts specific MCS mode to carry out transfer of data for notification terminal;
Form types notification unit, for when described specific MCS mode is 256QAM, notify that described terminal selects to correspond to the MCS/CQI/TBS form of 256QAM, for described transfer of data, otherwise notify that described terminal selects original MCS/CQI/TBS form, for described transfer of data.
12. data transmission devices according to claim 11, is characterized in that, described form types notification unit comprises:
Transmission mode notice subelement, for notifying that described terminal adopts specific transmission mode to carry out described transfer of data;
Wherein, when notifying that described terminal adopts the main transmission mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when notifying that described terminal adopts the fall-back mode of described specific transmission mode to carry out described transfer of data, show that described terminal needs to select original MCS/CQI/TBS form.
13. data transmission devices according to claim 12, is characterized in that, described main transmission mode represents that corresponding transfer of data supports 256QAM modulation system, and described fall-back mode represents that corresponding transfer of data does not support 256AQM modulation system.
14. data transmission devices according to claim 12, is characterized in that, described specific transmission mode comprises:
Arbitrary transmission mode that described terminal is supported;
Or only by the transmission mode of the terminal-specific of support 256QAM.
15. data transmission devices according to claim 11, is characterized in that, described form types notification unit comprises:
Scrambling subelement, for when described specific MCS mode is 256QAM, adopts First ray to carry out scrambling to corresponding Downlink Control Information, otherwise adopts the corresponding Downlink Control Information of the second sequence pair to carry out scrambling.
16. data transmission devices according to claim 11, is characterized in that, described form types notification unit comprises:
Message frame generates subelement, for generating messages frame, form types mark is comprised in described message frame, when described form types is designated the first value, represent that described terminal needs select to correspond to the MCS/CQI/TBS form of 256QAM, when described form types is designated the second value, represent that described terminal needs to select original MCS/CQI/TBS form;
Message frame sends subelement, for sending described message frame to described terminal.
17. data transmission devices according to claim 16, is characterized in that, described message frame is RRC signaling or MAC signaling.
18., according to claim 11 to the data transmission device according to any one of 17, is characterized in that, also comprise:
Information expansion unit, for when described specific MCS mode is 256QAM, the bit quantity of expansion CQI reporting information.
19. data transmission devices according to claim 18, is characterized in that, the described CQI reporting information after expansion comprises 3 bits.
20. data transmission devices according to claim 18, is characterized in that, described CQI reporting information is sub-band CQI information.
21. 1 kinds of base stations, is characterized in that, comprising: the data transmission device according to any one of claim 11 to 20.
Priority Applications (2)
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| CN201510030231.1A CN104506282A (en) | 2014-01-24 | 2015-01-20 | Data transmission method, data transmission device and base station |
| PCT/CN2015/075543 WO2016115773A1 (en) | 2014-01-24 | 2015-03-31 | Data transmission method, data transmission apparatus and base station |
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| CN201410036453X | 2014-01-24 | ||
| CN201410036453.XA CN103746776A (en) | 2014-01-24 | 2014-01-24 | Data transmission method, data transmission device and base station |
| CN201510030231.1A CN104506282A (en) | 2014-01-24 | 2015-01-20 | Data transmission method, data transmission device and base station |
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| US11362758B2 (en) | 2018-01-12 | 2022-06-14 | Huawei Technologies Co., Ltd. | Communication method and communications device |
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| US20150195819A1 (en) | 2014-01-06 | 2015-07-09 | Intel IP Corporation | Systems and methods for modulation and coding scheme selection and configuration |
| US9467269B2 (en) * | 2014-01-06 | 2016-10-11 | Intel IP Corporation | Systems and methods for modulation and coding scheme selection and configuration |
| CN103746776A (en) * | 2014-01-24 | 2014-04-23 | 宇龙计算机通信科技(深圳)有限公司 | Data transmission method, data transmission device and base station |
| PL3175593T3 (en) * | 2014-07-29 | 2020-05-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Signaling of modulation configuration |
| WO2018059567A1 (en) * | 2016-09-29 | 2018-04-05 | 华为技术有限公司 | Codebook-based channel status information feedback method and device |
| CN109586841A (en) * | 2017-09-29 | 2019-04-05 | 中兴通讯股份有限公司 | Configuration method, relevant device and the storage medium of channel quality indication (CQI) information |
| WO2019157697A1 (en) * | 2018-02-14 | 2019-08-22 | 株式会社Ntt都科摩 | Transmission block size list constructing and selecting method, random access method, and communication device |
| CN113572571B (en) * | 2020-04-29 | 2023-06-27 | 华为技术有限公司 | Data transmission method and device, chip system and computer readable storage medium |
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| CN103746776A (en) | 2014-04-23 |
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