CN109245865B - A kind of means of communication, base station, user equipment and communication system - Google Patents
A kind of means of communication, base station, user equipment and communication system Download PDFInfo
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- CN109245865B CN109245865B CN201811506858.XA CN201811506858A CN109245865B CN 109245865 B CN109245865 B CN 109245865B CN 201811506858 A CN201811506858 A CN 201811506858A CN 109245865 B CN109245865 B CN 109245865B
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- 238000005259 measurement Methods 0.000 claims description 14
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- 101100005271 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) cat-1 gene Proteins 0.000 description 5
- 238000010295 mobile communication Methods 0.000 description 4
- 238000012163 sequencing technique Methods 0.000 description 4
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Classifications
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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
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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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
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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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
-
- 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
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
-
- 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
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
Abstract
This application discloses a kind of means of communication, comprising: base station sends downlink data and corresponding TBS value to user equipment.Whether the TBS value that user equipment judgement receives is greater than the maximum allowable capacity of the transmission block of down direction in a TTI itself supported.If so, the value of HARQ-ACK message is determined as NACK by user equipment, and reduce the CQI value reported.If not, user equipment is decoded the downlink data received.If successfully decoded, the value of HARQ-ACK message is determined as ACK by user equipment, and increases the CQI value reported.If decoding failure, the value of HARQ-ACK message is determined as NACK by user equipment, and reduces the CQI value reported.The value of obtained HARQ-ACK message and the CQI value reported are fed back to base station by up channel by user equipment.Distribute to the TBS value of the downlink data of the user equipment next time with the CQI value adjustment reported according to the value of the HARQ-ACK message received in base station.The application can make being capable of normal communication between the base station for only supporting higher data handling capacity and the only user equipment of support lower data handling capacity.
Description
Technical field
This application involves a kind of mobile communication technology, more particularly to it is a kind of only support the base station of higher data handling capacity with
Only support the means of communication and device between the user equipment of lower data handling capacity.
Background technique
LTE user equipment (UE, User Equipment) is divided into different classes of (category), base according to specification
Standing, (BS, such as eNodeb) according to the classification of user equipment to understand its performance standard more accurate, more with user equipment to realize
Efficiently communicate.3GPP Release 8 defines the classification of five kinds of LTE user equipmenies, to distinguish different peak-peak speed
Rate and to MIMO(Multi-input Multi-output, multiple-input and multiple-output) whether support.3GPP Release 10 increases
The classification of three kinds of new LTE user equipmenies is added.3GPP Release 11 increases the class of four kinds of new LTE user equipmenies again
Not.Since 3GPP Release 12, the classification of LTE user equipment is subdivided into downlink classification and uplink classification, with area respectively
Divide the performance of downlink data handling capacity and upstream data throughput.
The Category 1(CAT1 of LTE user equipment) class declaration is in a TTI(Transmission Time
Interval, Transmission Time Interval) the maximum allowable capacity of transmission block (TB, Transport Block) of interior down direction is
10296 bits (bits), the maximum allowable capacity of the transmission block of up direction is 5160 bits, down direction in a TTI
Space division multiplexing (spatial multiplexing) could support up 1 MIMO layer.
The Category 4(CAT4 of LTE user equipment) class declaration transmission block of down direction in a TTI
Maximum allowable capacity is 150752 bits, and the maximum allowable capacity of the transmission block of up direction is 51024 ratios in a TTI
Spy, down direction space division multiplexing could support up 2 MIMO layers.
The CAT1 classification and CAT4 classification for comparing LTE user equipment are it can be found that the two down direction in a TTI
The maximum allowable capacity of the transmission block of up direction, down direction space division multiplexing in the maximum allowable capacity of transmission block, a TTI
All there is significant difference in the MIMO layer quantity supported, thus there are significant differences on data throughout.
There is the LTE base station for only supporting higher data handling capacity in existing mobile communication network, such as certain LTE base stations are only
Support the LTE user equipment of CAT4 or the above classification.And some LTE user equipmenies only support lower data handling capacity, such as certain
A little LTE user equipmenies belong to CAT1 classification.It is only propped up described in being linked into when the user equipment for only supporting lower data handling capacity
When holding the base station of higher data handling capacity, the base station is possible to set according to the standard of higher data handling capacity to the user
The downlink data of the standby maximum allowable capacity for being allocated more than its transmission block, so as to cause user equipment cisco unity malfunction.It is described
Base station is it is also possible to the standard according to higher data handling capacity is allocated more than its space division multiplexing supported to the user equipment
MIMO layer number, so as to cause user equipment cisco unity malfunction.
Summary of the invention
It only supports the LTE base station of higher data handling capacity the technical problem to be solved by the application is to provide a kind of and only props up
Hold the means of communication between the LTE user equipment of lower data handling capacity.In addition, the application also provides corresponding base station, use
Family equipment and communication system.
In order to solve the above technical problems, including the following steps this application provides the first means of communication.Step 201: base
It stands and sends downlink data and corresponding TBS value to user equipment in down channel.Step 202: user equipment judgement receives
Whether TBS value is greater than the maximum allowable capacity of the transmission block of down direction in a TTI itself supported.If so, into
Enter step 203.If not, entering step 204.Step 203: the value of HARQ-ACK message is determined as NACK by user equipment, and
Reduce the CQI value reported.Step 204: user equipment is decoded the downlink data received.If successfully decoded, into step
Rapid 205.If decoding failure, enters step 203.Step 205: the value of HARQ-ACK message is determined as ACK by user equipment, and
Increase the CQI value reported.Step 206: user equipment is by the value of the obtained HARQ-ACK message of step 203 or step 205 and upper
The CQI value of report feeds back to base station by up channel.Step 207: base station is according to the value of the HARQ-ACK message received and reports
CQI value adjustment distribute to next time the user equipment downlink data TBS value.The first above-mentioned means of communication are by user
Equipment reports the value of HARQ-ACK message and the CQI value reported to base station, and the CQI value reported is the CQI value in measurement
On the basis of changed, this two item data facilitates the TBS value for the downlink data that base station is more targetedly adjusted next time.
Further, in the step 202, user equipment also passes through measurement and obtains the CQI value of reflection down channel quality.
When user equipment receives downlink data, the CQI value of down channel will be measured, as the subsequent base being changed to CQI value
Plinth.
Further, in the step 207, this factor of the value of the HARQ-ACK message is individually to next sub-distribution
The influence of downlink TBS value be: when, when the value of HARQ-ACK message is NACK, base station reduces the downlink TBS of next sub-distribution
Value；When the value of HARQ-ACK message is ACK, the downlink TBS value of next sub-distribution is improved in base station.The value of the CQI reported
Influence of this factor individually to the downlink TBS value of next sub-distribution is: when, when the CQI value reported is lower, under base station reduces
The downlink TBS value of primary distribution；When the CQI value reported is higher, the downlink TBS value of next sub-distribution is improved in base station.Consider simultaneously
The combination of the two factors of the value of the HARQ-ACK message He the value of the CQI reported is to the downlink TBS value of next sub-distribution
Influence is: when, when the value of HARQ-ACK message is NACK and the CQI value that reports is lower, base station is reduced under next sub-distribution
Row TBS value；When the value of HARQ-ACK message is ACK and the CQI value that reports is higher, the downlink of next sub-distribution is improved in base station
TBS value.Above content reflects that base station adjusts next sub-distribution according to the value of the HARQ-ACK message received and the CQI value reported
To the internal logic of the TBS value of the downlink data of the user equipment.
Present invention also provides second of means of communication, include the following steps.Step 301: base station down channel to
Family equipment sends downlink data and corresponding TBS value, the quantity of corresponding MIMO layer.Step 302: user equipment judgement receives
TBS value whether be greater than the maximum allowable capacity of the transmission block of down direction in a TTI itself supported.If so,
Enter step 303.If not, entering step 304.Step 303: the value of HARQ-ACK message is determined as NACK by user equipment,
And reduce the CQI value reported, and the maximum number of the MIMO layer for the down direction space division multiplexing that RI value is determined as itself being supported
Amount.Step 304: whether the quantity for the MIMO layer that user equipment judgement receives is greater than the down direction space division multiplexing itself supported
MIMO layer maximum quantity.If so, entering step 303.If not, entering step 305.Step 305: user equipment is to receipts
To downlink data be decoded.If successfully decoded enters step 306.If decoding failure, enters step 303.Step
306: the value of HARQ-ACK message is determined as ACK by user equipment, and increases the CQI value reported, and RI value is determined as itself
The maximum quantity of the MIMO layer for the down direction space division multiplexing supported.Step 307: user equipment is by step 303 or step 306
The value of obtained HARQ-ACK message, the CQI value reported and RI value feed back to base station by up channel.Step 308: base station root
Distribute to the downlink data of the user equipment next time with the CQI value adjustment reported according to the value of the HARQ-ACK message received
TBS value.Base station determines the space division multiplexing for the downlink data for distributing to the user equipment next time also according to the RI value received
The quantity of MIMO layer.Above-mentioned second of means of communication report the value of HARQ-ACK message, the CQI reported from user equipment to base station
Value and RI value, the CQI value reported is changed on the basis of the CQI value of measurement, and preceding two item data facilitates base
It stands and more targetedly adjusts the TBS value of downlink data next time, last item data facilitates base station more targetedly
Adjust the MIMO layer number of downlink data space division multiplexing next time.
Further, second of means of communication include the following steps: step 401: identical as step 301.Step
402: whether the quantity for the MIMO layer that user equipment judgement receives is greater than the MIMO for the down direction space division multiplexing itself supported
The maximum quantity of layer；If so, entering step 403；If not, entering step 404.Step 403: identical as step 303.Step
404: whether the user equipment judgement TBS value that receives is greater than the transmission block of down direction in a TTI itself supported
Maximum allowable capacity；If so, entering step 403；If not, entering step 405.Step 405 is to step 408: respectively with step
Rapid 305 is identical to step 308.Above content is a kind of deformation to above-mentioned second of means of communication, shows the judgement step of TBS value
Suddenly it can be realized with exchange sequence without influencing the whole of above-mentioned second of means of communication with the judgment step of MIMO layer number.
Further, in the step 302 or step 402, user equipment also passes through measurement and obtains reflection down channel matter
The CQI value of amount.User equipment receive downlink data when, the CQI value of down channel will be measured, as it is subsequent to CQI value into
The basis of row variation.
Further, in the step 308 or step 408, this factor of the value of the HARQ-ACK message is individually single
The solely influence to the downlink TBS value of next sub-distribution is: when the value of HARQ-ACK message is NACK, base station reduces to be divided next time
The downlink TBS value matched；When the value of HARQ-ACK message is ACK, the downlink TBS value of next sub-distribution is improved in base station.On described
Influence of this factor of the value of the CQI of report individually to the downlink TBS value of next sub-distribution is: when the CQI value reported is lower, base
Standing reduces the downlink TBS value of next sub-distribution；When the CQI value reported is higher, the downlink TBS value of next sub-distribution is improved in base station.
The combination of the two factors of the value of the HARQ-ACK message He the value of the CQI reported is to the downlink TBS value of next sub-distribution
Influence is: when the CQI value that the value of HARQ-ACK message is NACK and is reported is lower, base station reduces the downlink of next sub-distribution
TBS value；When the value of HARQ-ACK message is ACK and the CQI value that reports is higher, the downlink TBS of next sub-distribution is improved in base station
Value.Above content reflects that base station is distributed to next time according to the value of the HARQ-ACK message received and the CQI value reported adjustment
The internal logic of the TBS value of the downlink data of the user equipment.
Further, in the step 308 or step 408, base station is described as distributing to next time using the RI value received
The quantity of the MIMO layer of the space division multiplexing of the downlink data of user equipment.This reflects that base station is next according to the RI value adjustment received
Internal logic of the sub-distribution to the MIMO layer number of the space division multiplexing of the downlink data of the user equipment.
Present invention also provides the first base stations, including the first transmission unit and the first parameter adjustment unit.Described first
Transmission unit sends downlink data and corresponding TBS value to user equipment in down channel, also receives in up channel
Value from the HARQ-ACK message of user equipment and the CQI value that reports.First parameter adjustment unit is according to receiving
The TBS value of the downlink data of the user equipment is distributed in the value of HARQ-ACK message and the CQI value reported adjustment next time.On
The first base station is stated to be used to realize the first above-mentioned means of communication.
Present invention also provides second of base stations, including the second transmission unit and the second parameter adjustment unit.Described second
Transmission unit sends downlink data and corresponding TBS value, corresponding MIMO layer number to user equipment in down channel, also exists
The value that the HARQ-ACK message from user equipment is received in up channel, the CQI value and RI value reported.Second parameter
Adjustment unit distributes to the user equipment with the CQI value adjustment reported according to the value of the HARQ-ACK message received next time
The TBS value of downlink data distributes to the MIMO of the downlink data of the user equipment also according to the RI value adjustment received next time
The number of plies.Above-mentioned second of base station is used to realize above-mentioned second of means of communication.
Present invention also provides the first user equipment, including the first communication unit, CQI measuring unit, TBS judgement are single
Member, decoding unit, the first assignment unit.First communication unit receives the downlink data from base station in down channel
And corresponding TBS value, the CQI value for sending the value of HARQ-ACK message to base station also in up channel and reporting.The CQI
Measuring unit obtains the CQI value of reflection down channel quality by measurement.The TBS value that TBS judging unit judgement receives with
Itself supported in the size relation in a TTI between the maximum allowable capacity of the transmission block of down direction.The decoding
Unit is decoded downlink data.Decoding unit is only less than or equal to itself institute in the TBS value that the judgement of TBS judging unit receives
That supports just works when the maximum allowable capacity of the transmission block of down direction in a TTI.The first assignment unit determines
The CQI value that value, the adjustment CQI measuring unit of HARQ-ACK message are obtained by measurement.It is received when the judgement of TBS judging unit
TBS value is greater than the maximum allowable capacity or decoding unit pair of the transmission block of down direction in a TTI itself supported
When downlink data decoding failure, the value of HARQ-ACK message is determined as NACK by the first assignment unit, and reduces the CQI reported
Value.When decoding unit is to downlink data successfully decoded, the value of HARQ-ACK message is determined as ACK by the first assignment unit, and
Increase the CQI value reported.The first above-mentioned user equipment is used to realize the first above-mentioned means of communication.
Present invention also provides second of user equipment, including the second communication unit, CQI measuring unit, TBS judgement are single
Member, MIMO layer number judging unit, decoding unit, the second assignment unit.Second communication unit receives in down channel to be come
From in the downlink data of base station and corresponding TBS value, corresponding MIMO layer number, sent also in up channel to base station
The value of HARQ-ACK message, the CQI value reported and RI value.The CQI measuring unit obtains reflection down channel matter by measurement
The CQI value of amount.The TBS value that the TBS judging unit judgement receives and the biography of down direction in a TTI itself supported
Size relation between defeated piece of maximum allowable capacity.The MIMO layer number judging unit judges the MIMO layer number received and itself
Size relation between the maximum quantity of the MIMO layer for the down direction space division multiplexing supported.The decoding unit is to lower line number
According to being decoded.Decoding unit only the TBS value that receives of TBS judging unit judgement be less than or equal to itself supported at one
The quantity for the MIMO layer that the maximum allowable capacity of the transmission block of down direction and the judgement of MIMO layer number judging unit receive in TTI
It just works when the maximum quantity of the MIMO layer for the down direction space division multiplexing supported less than or equal to itself.Second assignment
Unit determines the value of HARQ-ACK message, adjustment CQI measuring unit by measuring obtained CQI value, determining RI value.When TBS sentences
The TBS value that disconnected unit judges receive is greater than the maximum allowable appearance of the transmission block of down direction in a TTI itself supported
The MIMO layer number that amount or the judgement of MIMO layer number judging unit receive is greater than the down direction space division multiplexing itself supported
When the maximum quantity or decoding unit of MIMO layer decode failure to downlink data, the second assignment unit is by HARQ-ACK message
Value be determined as NACK, and reduce the CQI value reported.When decoding unit is to downlink data successfully decoded, the second assignment unit
The value of HARQ-ACK message is determined as ACK, and increases the CQI value reported.RI value is also determined as itself by the second assignment unit
The maximum quantity of the MIMO layer for the down direction space division multiplexing supported.Above-mentioned second of user equipment is used to realize above-mentioned second
The kind means of communication.
Present invention also provides the first communication systems, including the first above-mentioned base station and the first above-mentioned user to set
It is standby.The first above-mentioned communication system is used to realize the first above-mentioned means of communication.
Present invention also provides second of communication systems, including above-mentioned second of base station and above-mentioned second of user to set
It is standby.Above-mentioned second of communication system is used to realize above-mentioned second of means of communication.
What the application obtained has the technical effect that so that only supporting the base station of higher data handling capacity and only supporting lower data
Between the user equipment of handling capacity can normal communication, such as CAT1, CAT2 or CAT3 classification LTE user equipment use this Shen
It can please be worked normally in the case where only supporting the LTE base station of LTE user equipment of CAT4 or the above classification after the scheme.
Detailed description of the invention
Fig. 1 is the schematic diagram of a scenario communicated between user equipment and base station.
Fig. 2 is the flow chart of the first embodiment of the means of communication between the base station of the application and user equipment.
Fig. 3 is the flow chart of the second embodiment of the means of communication between the base station of the application and user equipment.
Fig. 4 is the flow chart of the 3rd embodiment of the means of communication between the base station of the application and user equipment.
Fig. 5 is the structural schematic diagram of the first embodiment of the base station of the application.
Fig. 6 is the structural schematic diagram of the second embodiment of the base station of the application.
Fig. 7 is the structural schematic diagram of the first embodiment of the user equipment of the application.
Fig. 8 is the structural schematic diagram of the second embodiment of the user equipment of the application.
Fig. 9 is the structural schematic diagram of the first embodiment of the communication system of the application.
Figure 10 is the structural schematic diagram of the second embodiment of the communication system of the application.
Description of symbols in figure: 101 be user equipment；102 be base station；103 be down channel；104 be up channel；
51 be the first transmission unit；53 be the first parameter adjustment unit；61 be the second transmission unit；63 be the second parameter adjustment unit；
71 be the first communication unit；73 be CQI measuring unit；75 be TBS judging unit；77 be decoding unit；79 be the first assignment list
Member；81 be the second communication unit；85 be MIMO layer number judging unit；89 be the second assignment unit.
Specific embodiment
Referring to Fig. 1, this is the schematic diagram of a scenario communicated between user equipment and base station in mobile communication network.
The user equipment 101 only supports lower data handling capacity, and higher data handling capacity is only supported in the base station 102.This refers to
LTE user equipment classification belonging to user equipment 101 is lower than the classification for the LTE user equipment that base station 102 is supported.For example, institute
It states user equipment 101 and belongs to CAT1, CAT2 or CAT3 classification, and the base station 102 only supports the LTE of CAT4 or higher classification to use
Family equipment, thus the user equipment 101 only supports lower data handling capacity, and the base station 102 only supports higher data to gulp down
The amount of spitting.
Tighter form of presentation is as follows.By one or more LTE user equipment classifications belonging to the user equipment 101
In a highest classification maximum allowable capacity of the transmission block of down direction in a TTI be set as u1, down direction space division
The maximum quantity for being multiplexed supported MIMO layer number is set as u2.A highest classification refers to data throughput in multiple classifications
Highest classification is measured, or more specifically refers in multiple classifications the maximum allowable of in the TTI transmission block of down direction
The highest classification of capacity, or more specifically refer to the maximum quantity of down direction space division multiplexing MIMO layer number in multiple classifications most
Low classification.A minimum classification is at one in one or more LTE user equipment classifications that the base station 102 is supported
The TBS of down direction is set as b1 in TTI, and the MIMO layer number that down direction space division multiplexing is supported is set as b2.Described minimum one
A classification refers to the classification that data throughout is minimum in multiple classifications, or more specifically refers in multiple classifications in a TTI
The minimum classification of the maximum allowable capacity of the transmission block of interior down direction, or more specifically refer to down direction in multiple classifications
The minimum classification of the maximum quantity of space division multiplexing MIMO layer number.So data throughout it is lower with it is higher refer to meet u1 <
Any one in b1, u2 < b2.
In Fig. 1, the user equipment 101 is registered on the base station 102.Down channel 103 indicates that uplink is believed with solid line
Road 104 is represented by dotted lines.In certain downlink communication, under base station 102 is sent in down channel 103 to user equipment 101
The accordingly and corresponding TBS(Transport Block Size of line number, transport block size) value.User equipment 101 is by downlink data
The maximum allowable capacity of the transmission block of down direction in a TTI supported with itself of TBS value be compared, and full
Downlink data is decoded when sufficient specified conditions.User equipment 101 is with HARQ-ACK(Hybrid Automatic Repeat
ReQuest-Acknowledgement, hybrid automatic repeat request-confirmation message) message and CQI(Channel Quality
Indicator, channel quality instruction) form of value feeds back to base station 102 in up channel 104.Base station 102 is set according to user
The HARQ-ACK message and CQI value of standby 101 feedback distribute to the reference of the TBS value of user equipment 101 as next time.
Further, in certain downlink communication, under base station 102 is sent in down channel 103 to user equipment 101
Line number accordingly and accordingly TBS value, corresponding MIMO layer number.User equipment 101 is supported the TBS value of downlink data with itself
The maximum allowable capacity of the transmission block of down direction in a TTI be compared, also by the MIMO layer number of downlink data with
The maximum quantity of the MIMO layer for the down direction space division multiplexing itself supported is compared, and when meeting specified conditions under
Row data are decoded.User equipment 101 is with HARQ-ACK message, CQI value and RI(Rank Indication, order instruction) value
Form base station 102 is fed back in up channel 104.HARQ-ACK message that base station 102 is fed back according to user equipment 101 and
CQI value distributes to the reference of the TBS value of user equipment 101 as next time.The RI value that base station 102 is fed back according to user equipment 101
The reference of the MIMO layer number of user equipment 101 is distributed to as next time.
Therefore, user equipment 101 is by way of reporting several information to base station, so that base station recognizes that this downlink is logical
The case where letter, to targetedly adjust the parameter of downlink communication next time.
Referring to Fig. 2, this is the process of the first embodiment of the means of communication between the base station of the application and user equipment
Figure.The method of the first embodiment includes the following steps.
Step 201: base station sends downlink data and corresponding TBS value to user equipment in down channel.
Step 202: whether the TBS value that user equipment judgement receives is greater than the downlink side in a TTI itself supported
To transmission block maximum allowable capacity.If so, entering step 203.If not, entering step 204.
In this step, user equipment can also obtain the CQI value of reflection down channel quality by measuring.CQI value is lower, instead
It is poorer to reflect down channel quality.CQI value is higher, and reflection down channel quality is better.
Step 203: the value of HARQ-ACK message is determined as NACK(Negative by user equipment
Acknowledgement, negative response), and reduce the CQI value reported.Wherein it is determined that in the value and reduction of HARQ-ACK message
Unlimited sequencing between the CQI value of report.
Step 204: user equipment is decoded the downlink data received.If successfully decoded enters step 205.Such as
Fruit decoding failure, enters step 203.
Step 205: the value of HARQ-ACK message is determined as ACK(Acknowledgement, response by user equipment), and
Increase the CQI value reported.Wherein it is determined that unlimited sequencing between the CQI value that the value of HARQ-ACK message and increase report.
Step 206: user equipment is by the value of the obtained HARQ-ACK message of step 203 or step 205 and the CQI value that reports
Base station is fed back to by up channel.
Step 207: base station institute being distributed to the CQI value adjustment reported according to the value of the HARQ-ACK message received next time
State the TBS value of the downlink data of user equipment.
In this step, if only considering this factor of HARQ-ACK message, when the value of HARQ-ACK message is NACK,
It indicates this downlink data or has exceeded the maximum of the transmission block of down direction in a TTI that user equipment supported to permit
Perhaps capacity or user equipment fail decoding, therefore the downlink TBS value of next sub-distribution will be tended to reduce in base station.When
When the value of HARQ-ACK message is ACK, indicate that this downlink data falls in the downlink side in a TTI that user equipment is supported
To transmission block maximum allowable capacity in and be successfully decoded by user equipment, therefore base station will be tended to improve and divide next time
The downlink TBS value matched.
In this step, if only considering this factor of the CQI reported, when the CQI value reported is lower, down channel is indicated
Quality is poorer, therefore the downlink TBS value of next sub-distribution will be tended to reduce in base station.When the CQI value reported is higher, downlink is indicated
Channel quality is better, therefore the downlink TBS value of next sub-distribution will be tended to improve in base station.For example, with the value range of CQI
Midpoint is as line of demarcation.The CQI value reported is lower lower than the CQI value for thinking to report at value range midpoint, and base station reduces next
The downlink TBS value of sub-distribution；The CQI value for thinking to report that the CQI value reported is higher than value range midpoint is higher, under base station is improved
The downlink TBS value of primary distribution；The CQI value reported is equal to value range midpoint, and base station keeps the downlink TBS of next sub-distribution
It is worth identical as the downlink TBS value of this sub-distribution.
In this step, if two factors of CQI for comprehensively considering HARQ-ACK message and reporting, are divided into four kinds of situations.
The first situation is the value of HARQ-ACK message when being NACK and the lower CQI value that reports, and base station will be tended to reduce next time
The downlink TBS value of distribution.This is the situation in step 203.Second situation is that the value of HARQ-ACK message is ACK and reports
CQI value it is higher when, the downlink TBS value of next sub-distribution will be tended to improve in base station.This is the situation in step 205.Third
Kind of situation is that the value of HARQ-ACK message is NACK and the CQI value that reports is higher.4th kind of situation is the value of HARQ-ACK message
For ACK and the CQI value that reports it is lower.In the case of two kinds next base station how according to HARQ-ACK message and the CQI value that reports come
Adjustment TBS value belongs to the scheduling strategy of mobile communication network, and different vendor, different operators may have different selections.
In the first embodiment of the above-mentioned means of communication, user equipment is by reporting the value of HARQ-ACK message and upper to base station
The CQI value of report, so that the information the such as whether decoding of this downlink communication succeeds, down channel quality are recognized in base station, to have
Pointedly adjust the TBS value of downlink communication next time.Base station 102 unmatched for the standard of data throughout and user set
For standby 101, it is logical that subsequent downlink can be improved by one or many downlink communications for not entering decoding program or decoding failure
Probability is successfully decoded in letter.For example, the TBS value that base station determines is 51024 bits in first time downlink communication, that is out
The support range of user equipment.According to several information that user equipment is fed back for the first time, in second of downlink communication, base station is true
Fixed TBS value is 25512 bits, this still has exceeded the support range of user equipment.It is fed back according to second of user equipment
Several information, in third time downlink communication, the TBS value that base station determines is 12756 bits, this still has exceeded user equipment
Support range.According to several information of user equipment third time feedback, in the 4th downlink communication, the determining TBS value in base station
For 6378 bits, thus the 4th downlink data can be successfully decoded in user equipment within the scope of the support of user equipment for this.
Referring to Fig. 3, this is the process of the second embodiment of the means of communication between the base station of the application and user equipment
Figure.The method of the second embodiment includes the following steps.
Step 301: base station sends downlink data and corresponding TBS value, corresponding to user equipment in down channel
The quantity of MIMO layer.
Step 302: whether the TBS value that user equipment judgement receives is greater than the downlink side in a TTI itself supported
To transmission block maximum allowable capacity.If so, entering step 303.If not, entering step 304.
In this step, user equipment can also obtain the CQI value of reflection down channel quality by measuring.CQI value is lower, instead
It is poorer to reflect down channel quality.CQI value is higher, and reflection down channel quality is better.
Step 303: the value of HARQ-ACK message is determined as NACK by user equipment, and reduces the CQI value reported, and by RI
Value is determined as the maximum quantity of the MIMO layer for the down direction space division multiplexing itself supported.Wherein it is determined that HARQ-ACK message
Value, reduce report CQI value, determine unlimited sequencing between RI value.
Step 304: it is empty whether the quantity for the MIMO layer that user equipment judgement receives is greater than the down direction itself supported
Divide the maximum quantity of the MIMO layer of multiplexing.If so, entering step 303.If not, entering step 305.
Step 305: user equipment is decoded the downlink data received.If successfully decoded enters step 306.Such as
Fruit decoding failure, enters step 303.
Step 306: the value of HARQ-ACK message is determined as ACK by user equipment, and increases the CQI value reported, and by RI
Value is determined as the maximum quantity of the MIMO layer for the down direction space division multiplexing itself supported.Wherein it is determined that HARQ-ACK message
Value, increase report CQI value, determine unlimited sequencing between RI value.
Step 307: user equipment is by the value of the obtained HARQ-ACK message of step 303 or step 306, the CQI value reported
Base station is fed back to by up channel with RI value.
Step 308: base station institute being distributed to the CQI value adjustment reported according to the value of the HARQ-ACK message received next time
State the TBS value of the downlink data of user equipment.The user equipment is distributed to next time also according to the RI value decision received in base station
Downlink data space division multiplexing MIMO layer quantity.For example, distribute to the downlink data of the user equipment next time
The quantity of the MIMO layer of space division multiplexing is exactly the RI value received.
In the second embodiment of the above-mentioned means of communication, user equipment by reported to base station HARQ-ACK message value, on
The CQI value and RI value of report, so that base station recognizes whether the decoding of this downlink communication succeeds, down channel quality, Yong Hushe
The information such as the standby downlink MIMO layer number supported, to targetedly adjust the TBS value and MIMO layer of downlink communication next time
Number.For base station 102 unmatched for the standard of data throughout and user equipment 101, do not entered by one or many
Decoding program or the downlink communication of decoding failure be can be improved subsequent downlink communication probability is successfully decoded.For example, for the first time
In downlink communication, the MIMO layer number that base station determines is 2, and that is out the support ranges of user equipment.According to user equipment first
Several information of secondary feedback, in second of downlink communication, the MIMO layer number that base station determines is 2, this support in user equipment
In range thus user equipment secondary downlink data can be successfully decoded.
Referring to Fig. 4, this is the process of the 3rd embodiment of the means of communication between the base station of the application and user equipment
Figure.The method of the 3rd embodiment includes the following steps.
Step 401: identical as step 301.
Step 402: it is empty whether the quantity for the MIMO layer that user equipment judgement receives is greater than the down direction itself supported
Divide the maximum quantity of the MIMO layer of multiplexing.If so, entering step 403.If not, entering step 404.
In this step, user equipment can also obtain the CQI value of reflection down channel quality by measuring.CQI value is lower, instead
It is poorer to reflect down channel quality.CQI value is higher, and reflection down channel quality is better.
Step 403: identical as step 303.
Step 404: whether the TBS value that user equipment judgement receives is greater than the downlink side in a TTI itself supported
To transmission block maximum allowable capacity.If so, entering step 403.If not, entering step 405.
Step 405 is identical to step 308 as step 305 respectively to step 408.
The 3rd embodiment of the above-mentioned means of communication can be seen as a deformation of second embodiment, i.e., in a second embodiment
The judgement content of step 302 and step 304 can be interchanged, without influencing the entire means of communication.
Correspondingly, present invention also provides a kind of base stations for the means of communication between the base station and user equipment.
Referring to Fig. 5, this is the first embodiment of the base station of the application.The first embodiment of the base station 102 includes the
One transmission unit 51 and the first parameter adjustment unit 53.First transmission unit 51 is sent in down channel to user equipment
Downlink data and corresponding TBS value then receive the HARQ-ACK message from user equipment also in up channel
The CQI value for being worth and reporting.First parameter adjustment unit 53 is according to the value of the HARQ-ACK message received and the CQI value reported
The TBS value of the downlink data of the user equipment is distributed in adjustment next time.The first embodiment of above-mentioned base station, which corresponds to, to be realized
The first embodiment of the above-mentioned means of communication.
Referring to Fig. 6, this is the second embodiment of the base station of the application.The second embodiment of the base station 102 includes the
Two transmission units and 61 second parameter adjustment units 63.Second transmission unit 61 is sent in down channel to user equipment
Downlink data and corresponding TBS value, corresponding MIMO layer number then receive also in up channel from user equipment
The value of HARQ-ACK message, the CQI value reported and RI value.Second parameter adjustment unit 63 disappears according to the HARQ-ACK received
The TBS value of the downlink data of the user equipment is distributed in the value of breath and the CQI value reported adjustment next time, also according to what is received
The MIMO layer number of the downlink data of the user equipment is distributed in the adjustment of RI value next time.The second embodiment of above-mentioned base station is corresponding
In the second embodiment for realizing the above-mentioned means of communication.
Correspondingly, present invention also provides a kind of users to set for the means of communication between the base station and user equipment
It is standby.
Referring to Fig. 7, this is the first embodiment of the user equipment of the application.The first of the user equipment 101 is implemented
Example includes the first communication unit 71, CQI measuring unit 73, TBS judging unit 75, decoding unit 77, the first assignment unit 79.
First communication unit 71 receives the downlink data and corresponding TBS from base station in down channel
Value, the CQI value for then sending the value of HARQ-ACK message to base station also in up channel and reporting.
The CQI measuring unit 73 obtains the CQI value of reflection down channel quality by measurement.
The TBS judging unit 75 judges the TBS value received and the biography of down direction in a TTI itself supported
Size relation between defeated piece of maximum allowable capacity.
The decoding unit 77 is decoded downlink data.Decoding unit 77 is only received in the judgement of TBS judging unit 75
TBS value be less than or equal to the maximum allowable capacity Shi Caigong of the transmission block of down direction in a TTI that itself is supported
Make.
The first assignment unit 79 determines that the value of HARQ-ACK message, adjustment CQI measuring unit 73 are obtained by measurement
CQI value.When TBS judging unit 75 judges that the TBS value received is greater than the biography of down direction in a TTI itself supported
When defeated piece of maximum allowable capacity or decoding unit 77 decode failure to downlink data, the first assignment unit 79 is by HARQ-
The value of ACK message is determined as NACK, and reduces the CQI value reported.When decoding unit 77 is to downlink data successfully decoded, first
The value of HARQ-ACK message is determined as ACK by assignment unit 79, and increases the CQI value reported.
The first embodiment of above-mentioned user equipment corresponds to the first embodiment for realizing the above-mentioned means of communication.
Referring to Fig. 8, this is the second embodiment of the user equipment of the application.The second of the user equipment 101 is implemented
Example includes the second communication unit 81, CQI measuring unit 73, TBS judging unit 75, MIMO layer number judging unit 85, decoding unit
77, the second assignment unit 89.
Second communication unit 81 receives the downlink data and corresponding TBS from base station in down channel
Value, corresponding MIMO layer number, then also in up channel to base station send the value of HARQ-ACK message, the CQI value that reports and
RI value.
The CQI measuring unit 73 obtains the CQI value of reflection down channel quality by measurement.
The TBS judging unit 75 judges the TBS value received and the biography of down direction in a TTI itself supported
Size relation between defeated piece of maximum allowable capacity.
The MIMO layer number judging unit 85 judges the MIMO layer number received and the down direction spatial division multiplexing itself supported
Size relation between the maximum quantity of MIMO layer.
The decoding unit 77 is decoded downlink data.Decoding unit 77 is only received in the judgement of TBS judging unit 75
TBS value be less than or equal to the maximum allowable capacity and MIMO of the transmission block of down direction in a TTI itself supported
Number of plies judging unit 85 judges that the quantity of the MIMO layer received is less than or equal to the down direction space division multiplexing itself supported
It just works when the maximum quantity of MIMO layer.
The second assignment unit 89 determines that the value of HARQ-ACK message, adjustment CQI measuring unit 73 are obtained by measurement
CQI value, determine RI value.Under TBS judging unit 75 judges the TBS value received greater than itself being supported in a TTI
The MIMO layer number that maximum allowable capacity or MIMO layer number judging unit 85 judgement of the transmission block of line direction receive is greater than itself
The maximum quantity or decoding unit 77 of the MIMO layer for the down direction space division multiplexing supported, which decode downlink data, to fail
When, the value of HARQ-ACK message is determined as NACK by the second assignment unit 89, and reduces the CQI value reported.When decoding unit 77
When to downlink data successfully decoded, the value of HARQ-ACK message is determined as ACK by the second assignment unit 89, and is increased and reported
CQI value.RI value is also determined as the maximum of the MIMO layer for the down direction space division multiplexing itself supported by the second assignment unit 89
Quantity.
The second embodiment of above-mentioned user equipment corresponds to the second embodiment for realizing the above-mentioned means of communication.
Correspondingly, present invention also provides a kind of communication systems for the means of communication between the base station and user equipment
System.
Referring to Fig. 9, this is the first embodiment of the communication system of the application.The first embodiment master of the communication system
To include the first embodiment of base station shown in fig. 5 and the first embodiment of user equipment shown in Fig. 7, it is above-mentioned to correspond to realization
The first embodiment of the means of communication.
Referring to Fig. 10, this is the first embodiment of the communication system of the application.The second embodiment of the communication system
The mainly second embodiment of the second embodiment including base station shown in fig. 6 and user equipment shown in Fig. 8 corresponds on realizing
State the second embodiment of the means of communication.
The above is only preferred embodiment of the present application, it is not used to limit the application.Come for those skilled in the art
It says, various changes and changes are possible in this application.Within the spirit and principles of this application, made any modification, equivalent
Replacement, improvement etc., should be included within the scope of protection of this application.
Claims (8)
1. a kind of means of communication, characterized in that include the following steps:
Step 301: base station sends downlink data and corresponding TBS value, corresponding MIMO layer to user equipment in down channel
Quantity；
Step 302: whether the user equipment judgement TBS value that receives is greater than the down direction in a TTI itself supported
The maximum allowable capacity of transmission block；If so, entering step 303；If not, entering step 304；
Step 303: the value of HARQ-ACK message is determined as NACK by user equipment, and reduces the CQI value reported, and RI value is true
It is set to the maximum quantity of the MIMO layer for the down direction space division multiplexing itself supported；
Step 304: whether the quantity for the MIMO layer that user equipment judgement receives is greater than the down direction spatial division multiplexing itself supported
The maximum quantity of MIMO layer；If so, entering step 303；If not, entering step 305；
Step 305: user equipment is decoded the downlink data received；If successfully decoded enters step 306；If solution
Code failure, enters step 303；
Step 306: the value of HARQ-ACK message is determined as ACK by user equipment, and increases the CQI value reported, and RI value is true
It is set to the maximum quantity of the MIMO layer for the down direction space division multiplexing itself supported；
Step 307: user equipment is by the value of the obtained HARQ-ACK message of step 303 or step 306, the CQI value reported and RI
Value feeds back to base station by up channel；
Step 308: base station the use being distributed to the CQI value adjustment reported according to the value of the HARQ-ACK message received next time
The TBS value of the downlink data of family equipment；It is distributed under the user equipment next time also according to the RI value decision received base station
The quantity of the MIMO layer of the space division multiplexing of row data.
2. the means of communication according to claim 1, characterized in that include the following steps:
Step 401: identical as step 301；
Step 402: whether the quantity for the MIMO layer that user equipment judgement receives is greater than the down direction spatial division multiplexing itself supported
The maximum quantity of MIMO layer；If so, entering step 403；If not, entering step 404；
Step 403: identical as step 303；
Step 404: whether the user equipment judgement TBS value that receives is greater than the down direction in a TTI itself supported
The maximum allowable capacity of transmission block；If so, entering step 403；If not, entering step 405；
Step 405 is to step 408: identical to step 308 as step 305 respectively.
3. the means of communication according to claim 1 or 2, characterized in that in the step 302 or step 402, user equipment
The CQI value of reflection down channel quality is also obtained by measurement.
4. the means of communication according to claim 1 or 2, characterized in that described in the step 308 or step 408
Influence of this factor of the value of HARQ-ACK message individually to the downlink TBS value of next sub-distribution is: working as HARQ-ACK message
Value be NACK when, base station reduces the downlink TBS value of next sub-distribution；When the value of HARQ-ACK message is ACK, base station is improved
The downlink TBS value of next sub-distribution；
Influence of described this factor of the CQI value reported individually to the downlink TBS value of next sub-distribution is: as the CQI reported
Value is lower, and base station reduces the downlink TBS value of next sub-distribution；When the CQI value reported is higher, base station is improved under next sub-distribution
Row TBS value；
Downlink TBS value of the combination of the value of the HARQ-ACK message and CQI value the two factors reported to next sub-distribution
Influence be: when the value of HARQ-ACK message is NACK and the CQI value that reports is lower, base station is reduced under next sub-distribution
Row TBS value；When the value of HARQ-ACK message is ACK and the CQI value that reports is higher, the downlink of next sub-distribution is improved in base station
TBS value.
5. the means of communication according to claim 1 or 2, characterized in that in the step 308 or step 408, base station will be received
To RI value as the downlink data for distributing to the user equipment next time space division multiplexing MIMO layer quantity.
6. a kind of base station, characterized in that including the second transmission unit and the second parameter adjustment unit；
Second transmission unit sends downlink data and corresponding TBS value, corresponding to user equipment in down channel
MIMO layer number receives value, the CQI value reported and the RI of the HARQ-ACK message from user equipment also in up channel
Value；
Second parameter adjustment unit adjusts next sub-distribution with the CQI value reported according to the value of the HARQ-ACK message received
To the TBS value of the downlink data of the user equipment, the user equipment is distributed to next time also according to the RI value adjustment received
Downlink data MIMO layer number.
7. a kind of user equipment, characterized in that including the second communication unit, CQI measuring unit, TBS judging unit, MIMO layer number
Judging unit, decoding unit, the second assignment unit；
Second communication unit is received in down channel from the downlink data of base station and corresponding TBS value, corresponding
MIMO layer number, send the value of HARQ-ACK message, the CQI value and RI value that report to base station also in up channel；
The CQI measuring unit obtains the CQI value of reflection down channel quality by measurement；
The TBS value that TBS judging unit judgement receives and the transmission block of down direction in a TTI itself supported
Size relation between maximum allowable capacity；
The MIMO layer number that MIMO layer number judging unit judgement receives and the down direction space division multiplexing itself supported
Size relation between the maximum quantity of MIMO layer；
The decoding unit is decoded downlink data；Decoding unit is only less than in the TBS value that the judgement of TBS judging unit receives
Or the maximum allowable capacity of the transmission block of down direction in a TTI and MIMO layer the number judgement supported equal to itself are single
The quantity for the MIMO layer that member judgement receives is less than or equal to the maximum of the MIMO layer for the down direction space division multiplexing itself supported
It just works when quantity；
The second assignment unit determine HARQ-ACK message value, adjustment CQI measuring unit by measurement obtain CQI value,
Determine RI value；When the TBS value that the judgement of TBS judging unit receives is greater than the biography of down direction in a TTI itself supported
The MIMO layer number that defeated piece of maximum allowable capacity or MIMO layer number judging unit judgement receives is greater than the downlink itself supported
When the maximum quantity or decoding unit of the MIMO layer of direction space division multiplexing decode failure to downlink data, the second assignment unit
The value of HARQ-ACK message is determined as NACK, and reduces the CQI value reported；When decoding unit is to downlink data successfully decoded
When, the value of HARQ-ACK message is determined as ACK by the second assignment unit, and increases the CQI value reported；Second assignment unit will also
RI value is determined as the maximum quantity of the MIMO layer for the down direction space division multiplexing itself supported.
8. a kind of communication system, characterized in that set including base station as claimed in claim 6 and user as claimed in claim 7
It is standby.
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