CN106817722A - User equipment and its channel measuring method - Google Patents
User equipment and its channel measuring method Download PDFInfo
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- CN106817722A CN106817722A CN201510859850.1A CN201510859850A CN106817722A CN 106817722 A CN106817722 A CN 106817722A CN 201510859850 A CN201510859850 A CN 201510859850A CN 106817722 A CN106817722 A CN 106817722A
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- channel
- user equipment
- information
- base station
- channel measurement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
User equipment and its channel measuring method, methods described include：Receive the channel measurement configured information that base station sends；Based on the channel measurement configured information, the symbol to carrying channel status in default descending sub frame is measured, and generates corresponding channel condition information；The channel condition information that will be generated is sent to the base station, and scheduling of resource is implemented to cause that the base station is based on the channel condition information.Above-mentioned scheme, can improve the accuracy of the channel condition information that user equipment measurement is obtained.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of user equipment and its channel measuring method.
Background technology
Long Term Evolution (Long Term Evolution, LTE), is by third generation partner program (The
3rd Generation Partnership Project, 3GPP) UMTS organized to set up
The Long Term Evolution of (Universal Mobile Telecommunications System, UMTS) technical standard,
Formally set up the project and start in the meeting of 3GPP Toronto in December, 2004.LTE system introduces orthogonal
Frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) and multi input are more
The key technologies such as output (Multi-Input＆Multi-Output, MIMO), significantly increase frequency spectrum effect
Rate and message transmission rate, and support that various bandwidth is distributed：1.4MHz, 3MHz, 5MHz, 10MHz,
15MHz and 20MHz etc., and support global main flow 2G/3G frequency ranges and some newly-increased frequency ranges, thus frequency
More flexibly, power system capacity and covering are also obviously improved for spectrum distribution.The LTE system network architecture is more flat
Change and simplify, reduce network node and system complexity, so as to reduce Time Delay of Systems, also reduce
Network design and maintenance cost.LTE system is supported and other 3GPP systems interoperability.
In the prior art, user equipment (UE) foundation base station is in a complete descending sub frame (1ms)
The reference signal of transmission such as cell special reference (CRS, Cell specific Reference Signal)
Or channel state information reference signals (CSI-RS, Channel-status Information Reference Signal)
Quality to down channel is measured, and is generated corresponding channel condition information and is reported to base station.Base station
Channel condition information according to user equipment to report implements scheduling of resource.But, in actual application,
User equipment may not use a complete descending sub frame to be communicated, such as user equipment is at one
(0.5ms) receives descending control signaling and receives data in gap, and user equipment feeds back according to current mechanism
Channel condition information it is inaccurate, and then it is poor to cause base station to make resource dispatching strategy efficiency.
The content of the invention
The technical problem that the embodiment of the present invention is solved is how to improve the channel status that user equipment measurement is obtained
The accuracy of information.
To solve the above problems, a kind of channel measuring method of user equipment is the embodiment of the invention provides,
Methods described includes：
Receive the channel measurement configured information that base station sends；
Based on the channel measurement configured information, to the reference letter in the partial symbols length in descending sub frame
Number measure, and generate corresponding channel condition information；
The channel condition information that will be generated is sent to the base station, to cause that the base station is based on the letter
Channel state information implements scheduling of resource.
Alternatively, when the user equipment is the equipment for being configured with EPDCCH, the channel measurement refers to
Show that information includes measuring the information of original position.
Alternatively, the measurement original position is the 3rd sign bit in the descending sub frame.
Alternatively, when the Transmission Time Interval of the user equipment is less than 1ms, the channel measurement refers to
Show that information includes that the time span of channel measurement is equal to Transmission Time Interval.
Alternatively, the Transmission Time Interval is less than or equal to 0.5ms.
The embodiment of the present invention additionally provides a kind of user equipment, and the user equipment includes：
Receiving unit, is suitable to receive the channel measurement configured information that base station sends；
Channel measurement unit, is suitable to based on the channel measurement configured information, to the part in descending sub frame
Reference signal in symbol lengths is measured, and generates corresponding channel condition information；
Transmitting element, the channel condition information for being suitable to be generated is sent to the base station, described to cause
Base station is based on the channel condition information and implements scheduling of resource.
Alternatively, when the user equipment is the equipment for being configured with EPDCCH, the channel measurement refers to
Show that information includes measuring the information of original position.
Alternatively, the measurement original position is the 3rd sign bit in the descending sub frame.
Alternatively, when the Transmission Time Interval of the user equipment is less than 1ms, the channel measurement refers to
Show that information includes that the time span of channel measurement is equal to the information of the Transmission Time Interval.
Alternatively, the Transmission Time Interval is less than or equal to 0.5ms.
Compared with prior art, technical scheme has the following advantages that：
Above-mentioned scheme, in the descending sub frame complete to by configuring user equipment on partial symbols
Channel status is measured, and generates corresponding channel condition information so that the channel of user equipment feedback
Status information matches and more accurate with the channel condition information that base station scheduling user equipment is measured,
It is thus possible to improve the accuracy of the channel measurement of user equipment, and then allow that base station is made and reality
The scheduling of resource that the down channel quality on border is consistent, can improve spectrum efficiency.
Brief description of the drawings
Fig. 1 is the schematic diagram of the radio frames in LTE of the prior art；
Fig. 2 is the RE position views occupied by the CRS of two antenna port of the prior art；
Fig. 3 is a kind of flow chart of the channel measuring method of the user equipment in the embodiment of the present invention；
Fig. 4 is the structural representation of the user equipment in the embodiment of the present invention.
Specific embodiment
In LTE, a radio frames include 10 subframes, and each subframe includes two time slots (Slot),
The time span of each time slot is 0.5ms.
Refer to shown in Fig. 1 and Fig. 2, for each antenna port, an OFDM or single carrier
Frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA) is accorded with
The corresponding unit of a subcarrier on number is referred to as Resource Unit (RE).In one time slot, on frequency domain
Continuous width is referred to as a Resource Block (RB) for the physical resource of 180kHz.For conventional cyclic prefix
(Cyclic Prefix, CP), each time slot includes 7 OFDM symbol l0~l6；For extending CP, often
Individual time slot then includes 6 OFDM symbols.
CRS is that base station carries out down channel assessment and measurement by being transferred to user equipment in descending sub frame
Signal.Wherein, occupied by the CRS of different antenna ports RE is different.Fig. 2 is specifically referred to,
In two antenna ports, the RE positions R0 occupied by the CRS of first antenna port, and second day
The distribution of the RE positions R1 occupied by the CRS of line end mouthful,Represent occupied and unusable
RE positions.Channel state information reference signals (Channel State Information-Reference Signal,
CSI-RS it is) another to be transferred to user equipment in some descending sub frames by base station and carry out downlink channel condition
The signal of assessment.User equipment can be known according to the configuration of base station to be needed using CRS or CSI-RS
Carry out channel status assessment.Illustrated by taking CRS as an example below, it is emphasized that, it is of the present invention
Scheme is equally applicable to be carried out with CSI-RS the scene of channel estimating.
In the prior art, in order to be estimated to down channel and be measured, user equipment is complete at one
Transmission CRS in base station is received in descending sub frame, and the quality of down channel is carried out according to the CRS for being received
Measurement, and corresponding reporting source of channel state information to base station is generated, base station is then according to user equipment to report
Channel condition information implements scheduling of resource.
But, in actual applications, user equipment may not use the institute in a complete descending sub frame
There is symbol to be communicated with base station.For example, being configured with enhanced Physical Downlink Control Channel (Enhanced
Physical Downlink Control Channel, EPDCCH) user equipment such as some can only receive
The user equipment of 1.4M bandwidth, user equipment is in other symbols (symbol) outside control area
On EPDCCH on receive descending control signaling, and data are received according to descending control signaling.For another example,
When Transmission Time Interval (Transmission Time Interval, TTI) is less than 1ms (under complete
The time span of row subframe) when, base station scheduling user's set in TTI.In both scenes, such as
Fruit user equipment still assesses a channel quality for descending sub frame internal reference signals according to current mechanism, will
The channel less than 1ms required for causing channel condition information and base station actual schedule being carried out to user equipment
Status information is mismatched, and then causes base station to do the scheduling of resource for making mistake, and causes the waste of frequency spectrum resource.
To solve the above-mentioned problems in the prior art, the technical scheme that the embodiment of the present invention is used passes through
Configuration user equipment the reference signal in part symbol lengths in descending sub frame is measured, and generate it is right
The channel condition information answered, can improve the accuracy of the channel measurement of user equipment, and then improve scheduling
Accuracy, improve spectrum efficiency.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings
Specific embodiment of the invention is described in detail.
Fig. 3 shows a kind of flow chart of the channel measuring method of the user equipment in the embodiment of the present invention.
The channel measuring method of user equipment as shown in Figure 3, can include the steps：
Step S301：Receive the channel measurement configured information that base station sends.
In specific implementation, base station needs the quality according to down channel, makes corresponding scheduling of resource.
Simultaneously base station it is also known that press which kind of mode scheduling user's set, such as whether according to EPDCCH scheduling user set
It is standby, if to know whether and need user equipment with the TTI scheduling user's sets less than 1ms, therefore base station
Channel quality is assessed according to new mechanism.In order to obtain the quality information of down channel, base station can pass through
The mode of corresponding channel measurement configured information is sent to user equipment, it is desirable to which user equipment is to down channel
It is estimated and measures.
Step S302：Based on the channel measurement configured information, to the partial symbols length in descending sub frame
Interior reference signal is measured, and is generated corresponding channel condition information and is sent to the base station, so that
Obtain the base station and be based on channel condition information implementation scheduling of resource.
In specific implementation, in the channel measurement configured information that base station sends, base station can be set with instruction user
It is standby that reference signal in partial symbols (symbol) length in descending sub frame is measured.User sets
For when the channel measurement configured information of base station transmission is received, middle finger can be indicated to the channel measurement
The reference signal in partial symbols length in the descending sub frame for showing is measured (assess), generation correspondence
Channel condition information and send to base station.
In an embodiment of the present invention, when the user equipment Transmission Time Interval be less than 1ms when (
Base station is with the TTI scheduling user's sets less than 1ms), channel measurement configured information refers to the time of channel measurement
Length is equal to Transmission Time Interval.For example, when TTI scheduling user's set of the base station with 0.5ms, using
Family equipment receives descending control signaling and data in 0.5ms durations.Base station is in channel measurement configured information
In can be explicit the time span of instruction channel measurement be 0.5ms, base station can also indicate in channel measurement
The time span of instruction channel measurement implicit in information is 0.5ms, and such as base station is in configuration user equipment to report
The transfer resource set in channel condition information (also in channel measurement configured information) is 0.5ms length,
Refer to that user equipment needs to assess channel quality according to 0.5ms durations.
When user equipment is the equipment for being configured with EPDCCH, the descending control signaling of user equipment and
Data transfer is transmitted since the 3rd symbol of each subframe, therefore, base station can pass through
The channel measurement configured information instruction user equipment is proceeded by down from the 3rd symbol of descending sub frame
Row channel measurement.
In an alternative embodiment of the invention, base station can measure configured information instruction user by channel status
Equipment carries out letter in the time span of setting to the reference channel on the partial symbols in the descending sub frame
The assessment of road state.
In specific implementation, the predetermined time period could be arranged to less than or equal to 0.5ms.Wherein,
Base station can be reported less than or equal to 0.5ms durations (0.5ms i.e. 1 by RRC signaling instruction user equipment
Individual time slot) in the channel condition information that measures, base station can also be configured by other parameters less than or
TTI equal to 0.5ms, is reported less than or equal to the channel measured in 0.5ms durations with instruction user equipment
Status information.
It is to be herein pointed out before Release 13, being to the granularity that user equipment is scheduled
1ms (i.e. TTI=1ms), i.e. user equipment receive descending control signaling and corresponding data in 1ms,
New descending control signaling and new data are received in lower 1ms, user equipment measures the ginseng of 1ms durations
Signal is examined, channel quality is assessed, corresponding channel condition information is generated.And in Release 13, to
The granularity of family equipment scheduling may diminish as being changed into 0.5ms or shorter, to shorten data transfer
Time delay.
On the one hand, when the TTI of scheduling equipment is changed into 0.5ms, base station is also contemplated that acquisition 0.5ms durations
Channel condition information, this allows for channel condition information for being obtained measured by user equipment and expects with base station
The channel condition information of acquisition matches.
On the other hand, because the channel condition information for finally giving is the equal of the channel condition information on symbol
Value, when time span of the time contraction in length for 0.5ms or smaller, the letter for measurement is obtained
Channel state information is also more accurate.So, the channel condition information that base station can feed back according to user equipment
Correct scheduling of resource is made, it is thus possible to improve spectrum efficiency.
The corresponding device of channel state information feedback method in the embodiment of the present invention will be done further below
Detailed introduction.
Fig. 4 shows a kind of structural representation of the user equipment in the embodiment of the present invention.As shown in Figure 4
User equipment 400, can include receiving unit 401, channel measurement unit 402 and transmitting element 403,
Wherein：
The receiving unit 401, is suitable to receive the channel measurement configured information that base station sends.
The channel measurement unit 402, is suitable to based on the channel measurement configured information, in descending sub frame
Reference signal in partial symbols length is measured, and generates corresponding channel condition information.
The transmitting element 403, the channel condition information for being suitable to be generated is sent to the base station, so that
Obtain the base station and be based on channel condition information implementation scheduling of resource.
In specific implementation, when the user equipment is the equipment for being configured with EPDCCH, the channel
Measurement configured information includes measuring the information of original position.
In specific implementation, the measurement original position is the 3rd sign bit in the descending sub frame.
In specific implementation, when the Transmission Time Interval of the user equipment is less than 1ms, the channel
Measurement configured information includes that the time span of channel measurement is equal to the information of the Transmission Time Interval.
In specific implementation, the Transmission Time Interval is less than or equal to 0.5ms.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment
Rapid to can be by program to instruct the hardware of correlation to complete, the program can be stored in computer-readable
In storage medium, storage medium can include：ROM, RAM, disk or CD etc..
The method and system to the embodiment of the present invention have been described in detail above, and the present invention is not limited thereto.
Any those skilled in the art, without departing from the spirit and scope of the present invention, can make it is various change with
Change, therefore protection scope of the present invention should be defined by claim limited range.
Claims (10)
1. a kind of channel measuring method of user equipment, it is characterised in that including：
Receive the channel measurement configured information that base station sends；
Based on the channel measurement configured information, to the reference signal in the partial symbols length in descending sub frame
Measure, and generate corresponding channel condition information；
The channel condition information that will be generated is sent to the base station, to cause that the base station is based on the channel
Status information implements scheduling of resource.
2. the channel measuring method of user equipment according to claim 1, it is characterised in that when the use
When family equipment is the equipment for being configured with EPDCCH, the channel measurement configured information includes measurement
The information of original position.
3. the channel measuring method of user equipment according to claim 2, it is characterised in that the measurement
Original position is the 3rd sign bit in the descending sub frame.
4. the channel measuring method of user equipment according to claim 1, it is characterised in that when the use
When the Transmission Time Interval of family equipment is less than 1ms, the channel measurement configured information includes that channel is surveyed
The time span of amount is equal to the information of the Transmission Time Interval.
5. the channel measuring method of user equipment according to claim 4, it is characterised in that the transmission
Time interval is less than or equal to 0.5ms.
6. a kind of user equipment, it is characterised in that including：
Receiving unit, is suitable to receive the channel measurement configured information that base station sends；
Channel measurement unit, is suitable to based on the channel measurement configured information, to the part symbol in descending sub frame
Reference signal in number length is measured, and generates corresponding channel condition information；
Transmitting element, the channel condition information for being suitable to be generated is sent to the base station, to cause the base
Stand and implement scheduling of resource based on the channel condition information.
7. user equipment according to claim 6, it is characterised in that when the user equipment is to be configured with
During the equipment of EPDCCH, the channel measurement configured information includes measuring the information of original position.
8. user equipment according to claim 7, it is characterised in that the measurement original position is described
The 3rd sign bit in descending sub frame.
9. user equipment according to claim 6, it is characterised in that when the transmission of the user equipment
Between interval less than 1ms when, the channel measurement configured information includes time span of channel measurement etc.
In the information of the Transmission Time Interval.
10. user equipment according to claim 9, it is characterised in that the Transmission Time Interval be less than or
Equal to 0.5ms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510859850.1A CN106817722B (en) | 2015-11-30 | 2015-11-30 | User equipment and channel measuring method thereof |
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| CN201510859850.1A CN106817722B (en) | 2015-11-30 | 2015-11-30 | User equipment and channel measuring method thereof |
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| CN106817722A true CN106817722A (en) | 2017-06-09 |
| CN106817722B CN106817722B (en) | 2020-04-28 |
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| WO2019076077A1 (en) * | 2017-10-20 | 2019-04-25 | 华为技术有限公司 | Channel measurement method and user equipment |
| WO2021062806A1 (en) * | 2019-09-30 | 2021-04-08 | 华为技术有限公司 | Channel measurement method and communication device |
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| CN106817722B (en) | 2020-04-28 |
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