CN103647626B - Method and device for sending SRS in LTE TDD system - Google Patents
Method and device for sending SRS in LTE TDD system Download PDFInfo
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- CN103647626B CN103647626B CN201310454399.6A CN201310454399A CN103647626B CN 103647626 B CN103647626 B CN 103647626B CN 201310454399 A CN201310454399 A CN 201310454399A CN 103647626 B CN103647626 B CN 103647626B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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Abstract
The invention discloses a method and a device for sending SRS in an LTE TDD system. The method comprises following steps: a period parameter of uplink channel resources which can be used to transmit a detection reference signal SRS and the position of a SC-FDMA symbol are acquired; and if the period parameter is 2ms or 5ms, a UE is used to send the SRS signal which is generated in advance with the acquired actual cycle period. According to the invention, the effect that the SRS signals are sent by a LTE FDD system periodically can be realized. Meanwhile, compared with the LTE FDD system, the downlink signaling overhead of the system does not increased, the SRS transmission frequency the number can be ensured, and the purpose of the monitoring of the system on uplink wireless channels can be realized.
Description
The application be on May 9th, 2009 submit to application for a patent for invention " in lte tdd system send srs method and
The divisional application of device " the 200810099452.4th.
Technical field
The present invention relates to sending srs (soundingreference in communication system, more particularly to communication system
Signal method and apparatus).
Background technology
3gpp(the3rdGeneration partner project) standardization body carrying out new generation of wireless communication
The formulation of standard, this title is lte (long term evolution).On physical layer interface, new standard employ with
Traditional cdma (code division multiple access) technology different ofdm (0rthogonal frequency
Division multiplexing) technology, adopt ofdma mode in downlink, adopt sc-fdma in up-link
(single carrier frequency division multiple access).This new standard technique can be effectively right
Anti-multipath transmits, and employs frequency domain equalization operation and reduces conventional Time-domain complexity in a balanced way, is more suitably applied to broadband high-speed
Data transfer.
Lte standard technique can be divided into tdd (time division duplex) and fdd from air interface
(frequency division duplex) two classes, lte system supports bandwidth varying, the typical bandwidth of support includes 1.4,3,
5th, 10,15 and 20mhz, disclosure satisfy that the demand of different scenes.
The physical layer frame structure of lte fdd system is as shown in figure: the length of radio frames (101:radio frame) is
10ms, each radio frames is made up of, each wireless sub-frame 10 wireless sub-frames (102 is a subframe: radio sub-frame)
Duration be 1ms, each wireless sub-frame is made up of 2 time slots (103 is a time slot), and the duration of each time slot is 0.5ms.
The physical layer frame structure of lte tdd system is with reference to shown in figure two: the length of radio frames (201) is 10ms, and each is no
Line frame is made up of 10 wireless sub-frames (204 is a wireless sub-frame), and the duration of each wireless sub-frame is 1ms, 5 continuous nothings
Line subframe forms a field (202), and the duration of field is 5ms.From unlike lte fdd system, in lte tdd radio frames
The 1st wireless sub-frame (211) and the 6th wireless sub-frame (212) be 2 special subframes, the duration of special subframe is 1ms, by 3
Individual special time slot is constituted, and this 3 special time slots are respectively defined as dwpts (205 or 208), gp (206 or 209) and uppts
(207 or 210).Wherein, the time span of dwpts time slot, gp time slot and uppts time slot is variable, and concrete numerical value is joined by system
Put, total time length constant equal to 1ms.By 2 time slots, (203 is one to 8 subframes of other in addition to 2 special subframes respectively
Individual time slot) composition, the time span of each time slot is 0.5ms.According to current discussion result, subframe 0, subframe 5 and dwpts are solid
Surely it is used for downlink transfer, subframe 2 is fixed for uplink.
Lte tdd system can be divided into the structure of 5ms change-over period and the structure of 10ms change-over period.In 5ms conversion
In the structure in cycle, the structure of two fields is identical.In the lte tdd frame structure with 10ms as change-over period, constitute
Two time spans of one whole frame (308) of 10ms cycle are that the structure of the field of 5ms differs (304,305).According to need
Will, subframe 6 (307) could be configured as transmitting the subframe for 1ms for the time span of downlink data, and subframe 6 (307) can also be joined
Be set to is to have, with subframe 1 (306), the special subframe that mutually isostructural time span is 1ms.There is (5ms week in different switching cycle
Phase or 10ms cycle) lte tdd system different up-downgoing allocation proportions can be become by network configuration.
Two kinds be with 5ms and 10ms as cycle respectively lte tdd structure in, uppts is by 1 or 2 sc-
Fdma symbol forms, and concrete numerical value is by system configuration.When uppts is made up of 2 sc-fdma symbols, uppts is used for transmitting short
RACH (short rach) or srs (sounding reference signal: monitoring reference signal) signal
Or simultaneous transmission short rach channel and srs signal；When uppts is made up of 1 sc-fdma symbol, uppts is used for
Transmit up srs signal.Can be used in lte tdd system to do uplink uplink channel resources include uppts channel (by
1 or 2 sc-fdma symbol compositions) and upstream data subframe, user selects suitably up according to system configuration and scheduling
Resource transmission uplink information.
In lte system, according to network scheduling, ue (user equipment: user terminal) is to enodeb (evolved
Base station in nodeb:lte system) send srs signal.The Main Function of srs signal has: enodeb passes through to detect srs signal,
Estimate the channel quality in ue to enodeb link on the channel of transmission srs, thus carry out frequency selectivity data dispatch,
Enodeb does timing tracking and completes close-loop power control to ue.
According to current 3gpp (3gpp:the3rdGeneration partnership project, third generation partners cooperation
Plan, is the International Organization for Standardization being engaged in mobile communication standard) the standardized progress of lte fdd: (1) srs is given
When sub-frame transmission, srs transmission by started using subframe or the sc-ofdm symbol that terminates in some or all of time
Frequency resource.In transmission subframe in addition to the symbol starting or terminate may be used as srs transmission, other sc-
Fdma symbol is not used in srs transmission.(2) when the uppts being made up of 2 sc-fdma symbols is for transmitting srs, possible 2
Individual sc-fdma symbol may serve to transmit srs signal it is also possible to only one of which sc-fdma symbol is used for transmitting srs signal,
Present disclosure does not limit specifically has in uppts 1 or 2 sc-fdma symbols are used for transmitting srs signal, when standard is true
When determining uppts and have 1 sc-fdma symbol to be used for transmitting srs signal, the present invention do not limit be first or last
Individual sc-fdma symbol is used for srs to be transmitted.
According to the standardized progress of current 3gpp, the Main Conclusions that lte fdd system is transmitted with regard to srs includes:
(1) enodeb notifies ue by d-bch (dynamic broadcasting channel: Dynamic Broadcast Channel)
Information, comprising:
- according to scheduling, cyclical transmission srs in some sub-frame of uplink, then the information needs of some subframes of transmission srs
D-bch broadcasts.
(2) enodeb signals ue's by rrc (rrc:radio resource control wireless heterogeneous networks)
Information, comprising:
The transmission cycle of-srs: the numerical value selecting from { 2,5,10,20,40,80,160,320 } ms；
Cyclic shift (cs:cyclic shift: the cyclic shift) value of-srs；
No. comb of-srs use: can be comb0 or comb1.Sc-fdma wireless time-frequency money in transmission srs
In source (consisting of a plurality of sub-carriers), the frequency resource of transmission srs signal will be carried out according to the principle being spaced apart a subcarrier
It is divided into 2 groups, each group is referred to as a comb, is designated as comb0 or comb1；
The transmission bandwidth of-srs, can be broadband srs or arrowband srs；
The position of initial frequency resource in the subframe for-srs.
According to the progress of current research on standard, the srs method for designing of lte tdd and the problem running into are as follows:
It is assumed that srs transmission design is consistent with the srs transmission principle in lte fdd system in lte tdd system, then exist
On the premise of lte fdd appropriate design srs, srs transmission can be protected in positive lte tdd system meet system and carry out wireless channel prison
The needs surveyed.Design the srs transmission of ltetdd system according to this thinking, find in research: in lte fdd system, up
Transmission from downlink transfer using different frequency ranges it is ensured that uplink can be carried out continuously in time in terms of system perspective,
By base station scheduling, in the uplink frame of 10ms, scheduling subframe resource regularly transmits srs according to the specified srs cycle, because
For there being most 10 possible subframes to do uplink in the radio frames of 10ms, the cycle of can therefrom finding is 2ms's or 5ms
Radio Resource (frequency resource on given sc-fdma symbol in subframe) transmission srs.But, in lte tdd system, no matter
It is for 5ms transfer point periodic structure or 10ms transfer point periodic structure, all both included uplink within the transfer point cycle
Subframe also includes downlink transfer subframe, and so may can not find in the configuration that seven kinds of standards of all lte tdd are supported can
The cycle of 2ms or 5ms does srs transmission.
According to the problem that in lte tdd srs transmission design run into is analyzed above, at present using 2ms in ltefdd system
The method arranging srs transmission cycle with the cycle parameter of 5ms needs to redesign in ltetdd system, otherwise lte tdd system
After the srs cycle that ue in system receives system call, possibly cannot find suitable uplink channel resources transmission srs.
In order to solve this problem, this patent proposes a kind of new method and the dress that transmit srs in lte tdd system
Put.Using this invention, the srs dispatch that the ue of lte tdd system can be made to send according to network base station, find suitable nothing
Line resource transmission srs, thus uplink wireless channel monitoring can be made according to srs signal in the base station of lte tdd.The present invention have references to
In lte fdd system, ue is dispatched for cycle parameter with 2ms and 5ms and to send srs signal, new in conjunction with the construction featuress of lte tdd
Propose lte tdd system and how to obtain suitable wireless time frequency resource using 2ms and 5ms cycle parameter and transmit srs
Method and apparatus so that lte tdd transmits the frequent degree of srs signal and quantity is close with lte fdd, thus meeting lte
Requirement to srs transmission performance in tdd communication system.
Content of the invention
It is an object of the invention to provide the method and apparatus transmitting srs signal in a kind of tdd communication system for lte.
According to invention one side, a kind of sending method of uplink detection reference signal srs, including step:
A) cycle parameter of uplink channel resources that can be used for transmitting detection reference signal srs and sc-fdma symbol are obtained
Position；
If b) described cycle parameter is 2ms or is 5ms, ue is previously generated with the actual cycle transmission obtaining
Srs signal.
According to the another aspect of invention, a kind of lte tdd ue sends the device (406) of srs, is made up of lower part:
Module 401, for producing srs sequence；
Module 402, for receiving srs configuration information；
Module 403, for receiving srs transmitting scheduling information；
Controller 404, for sending srs sequence；
Module 405, for adjusting power factor.
Brief description
Fig. 1 is the frame structure schematic diagram of lte fdd；
Fig. 2 is the frame structure schematic diagram of lte tdd；
Fig. 3 is the lte tdd structural representation with 10ms for the transfer point cycle；
Fig. 4 is the installation drawing that ue transmits srs；
Fig. 5 is the schematic diagram of embodiment 1；
Fig. 6 is the schematic diagram of embodiment 2；
Fig. 7 is the schematic diagram of embodiment 3；
Fig. 8 is the schematic diagram of embodiment 4.
Specific embodiment
The present invention proposes the method and apparatus transmitting srs in a kind of tdd system in lte.Specific method includes following
Step:
1) network configuration can be used for transmitting the uplink channel resources of srs signal；
2) base station sends the dispatch of transmission srs to ue, scheduling ue network configuration can be used for transmit srs signal
The uplink channel resources specified are selected to transmit srs signal in uplink channel resources；
3) ue receive network configuration can be used for transmit srs signal uplink channel resources information with transmission srs scheduling
Signaling；
4) ue sends the srs signal previously generating on the uplink channel resources of network scheduling.
In inventive step 1) in, network can be by can be used in d-bch configuration system transmitting the up channel of srs signal
Resource, configures the number of sub-frame of uplink that can transmit srs in lte tdd system and concrete by d-bch channel
The position of subframe, this both can use the method for bit map (bit map) to realize it is also possible to by exhaustive all of resource feelings
Condition, such as n, then takes logarithm with 2 as bottom to configure (using bit number being: ceil (log2 (n))).
When configure the physical resource of transmission srs using d-bch, can be in two sub-sections.Part one: configuration
Uppts transmits the situation of srs
The transfer point cycle of no matter 5ms or 10ms, the number of the sc-fdma symbol of composition uppts in lte tdd system
Or 1 or 2, specific numerical value can be configured in p-bch or d-bch by system.For 10ms transfer point
The situation in cycle, present invention provide that, in composition subframe #1 (306) and subframe #6 (307), the sc-fdma number of uppts is identical
, that is, it is equal to 1 or be equal to 2, so can simplified system design on the premise of not affecting systematic function.
When uppts is made up of a sc-fdma symbol, directly defines it and be used for srs transmission；When uppts is by two sc-
During fdma symbol composition, following multiple method definition is had wherein to be used for the physical resource of srs transmission, including
Submethod 1: define first sc-fdma symbol and be used for srs transmission
Submethod 2: define second sc-fdma symbol and be used for srs transmission
Submethod 3: define two sc-fdma symbols and be all used for srs transmission
Submethod 1,2 or 3 can select one kind, by static system or be semi-statically configured.
Part two: configuration uppts and the situation using other upstream datas sub-frame transmission srs in addition to uppts
In lte tdd, (in the radio frames of a 10ms sub-frame of uplink and descending sub frame number because the proportioning of up-downgoing
The ratio of amount) different according to the difference of system configuration, form one illustrates all seven kinds of proportioning feelings of ltetdd standard support
Condition.
In form one, the determination with configuration sequence number is determined by the number of specific sub-frame of uplink, and specifically configures sequence
Number can broadcast in d-bch.For the configuration in 5ms transfer point cycle, in each half frame in, upstream data subframe (except
Other upstream data subframes outside uppts) may there are 3,2 or 1；For the configuration in 10ms transfer point cycle,
In each frame in, upstream data subframe may have 3,2,1 or 5.So, these subframes can all or portion
Divide and be used for transmitting srs signal.For different configuration sequence numbers, specifically used signaling is indicating the number of sub-frames for transmitting srs
And specifically subframe position is exemplified below,
The possible configuration of form one: lte tdd ascending-descending subframes distribution
The first uppts configuring condition: it is assumed that uppts is made up of a sc-fdma symbol, and assume in uppts
Whether scfdma symbol needs signaling to indicate for srs.
For configuration sequence number 0, each have 4 upward position transmission srs in the 5ms cycle it is contemplated that may have 0,1,2,3 or
4 upward position of person be used for transmit srs, it would be possible that position grouping just have:Kind,
So can complete, with 4 bit signallings, the instruction that srs transmits subframe, numerical value 0 means that the subframe not used for srs transmission, number
Mean that uppts and subframe #2, #3 and #4 are used for sub-frame of uplink transmission according to 15.In this case as well, it is possible to be reflected using bit
The method penetrated indicating, such as: 0000 represents the subframe not used for srs transmission, and 0110 means that subframe #2 and subframe #3 are used
In sub-frame of uplink transmission.
So the rest may be inferred, in the case of can obtaining supposing that uppts is made up of a sc-fdma symbol, in configuration sequence number 1
In the case of 2, the indication bit number of needs is 3 and 2 bits respectively.
In standardized protocol specification, both can be come using different number of bit for the situation of different configuration sequence numbers
Represent the subframe for uplink srs, the situation such as configuration serial number 0,1 and 2 is referred to 4,3 and 2 bits respectively
Show resource；Can also be in order to simplify and integrated system form, unification is represented using bit number the longest for up srs transmission
Sub-frame of uplink number and location, such as unified using 4 bits instructions under the 5ms transfer point cycle specific srs transmission occupancy
Physical sub-frame number and position.Or, the bit number of fixing instruction srs position is k, and the value of k is more than or equal to 0 and is less than
4.Here it is possible to indicate whether the symbol in uppts is used for srs with a bit；When the sub-frame of uplink number of half frame in is more than
During k-1, predefine k-1 subframe therein and can transmit srs, for example, front k-1 sub-frame of uplink, and compared with remaining k-1
Refer in particular to show.
Using identical principle, the configuration sequence number 3,4 and 5 to the 10ms change-over period, indicated with 4,3 and 2 bits respectively
Resource；Can also be in order to simplify and integrated system form, unification is represented using bit number the longest for up srs transmission
Sub-frame of uplink number and location, such as unification are using 4 bits instructions.Or, the bit number of fixing instruction srs position is k, k's
Value is more than or equal to 0 and is less than 4.Here it is possible to indicate whether the symbol in uppts is used for srs with a bit；Work as field
When interior sub-frame of uplink number is more than k-1, predefines k-1 subframe therein and can transmit srs, for example, front k-1 up son
Frame, and indicated with remaining k-1 bit.
To configuration sequence number 6, the sub-frame of uplink number difference 1 of two and half frame ins, at this moment, can specify that the srs of two and half frame ins
Number is the same with position distribution, and to configure according to the fewer field of sub-frame of uplink number, that is, adopt 3 bit instructions；Or
Person, can specify that the srs number of two and half frame ins is the same with position distribution, and according to the more fields of sub-frame of uplink number
To configure, that is, to adopt 4 bits, at this moment, if being assigned with subframe 4 for srs, and in the fewer field of sub-frame of uplink number
Interior corresponding subframe (i.e. subframe 9) is not sub-frame of uplink, then automatically consider few one of half fewer frame in of sub-frame of uplink number
Srs position.Or, the bit number of fixing instruction srs position is k, and the value of k is more than or equal to 0 and is less than 3.Here it is possible to use
One bit indicates whether the symbol in uppts is used for srs；When the sub-frame of uplink number of half frame in is more than k-1, predefine it
In k-1 subframe can transmit srs, for example, front k-1 sub-frame of uplink, and with remaining k-1 bit instruction.
For the form of further simplified system specification, the difference in the transfer point cycle of 5ms or 10ms can not be considered
Do not unify for the signaling bit of needs to be set to 4 bits, or the signaling bit of needs is set to k bit by unification, k takes
Value more than or equal to 0 and is less than 4.To the 5ms change-over period, this information indicates the position of the srs in each half frame in；Right
The configuration 3,4 and 5 of 10ms change-over period, the instruction of this information (or perhaps is comprising upstream time in each wireless frame in
Half frame in) srs position；Configuration 6 to the 10ms change-over period, this information indicates the position of the srs in each half frame in.
To configuration sequence number 6, the sub-frame of uplink number difference 1 of two and half frame ins, the method for another distribution srs is to allow
It is different that srs is distributed in this two and half frame in.This is to need 7 bits to indicate, first field 4 bit and second field 3
Bit.
For the form of simplified system specification, the signaling bit needing is arranged by the frame format unification to all configuration sequence numbers
For 8 bits.Thus 8 bits indicate respectively the srs distribution condition of corresponding sub-frame of uplink.Here, to the 5ms change-over period, first 4
Bit and rear 4 bits indicate respectively the srs position of one and half frame ins；To the 10ms change-over period, front 4 bits are used for instruction the
The position of the srs of one and half frame ins；Configuration 6 to the 10ms change-over period, front 7 bits are used for indicating the position of srs.Or,
The signaling bit of needs is set to 2k bit by unification, and to the 5ms change-over period, front k bit and rear k bit indicate respectively one
The srs position of individual half frame in；To the 10ms change-over period, front k bit is used for the position of the srs of first half frame in of instruction；Right
The configuration 6 of 10ms change-over period, front k bit and rear k bit indicate respectively the srs position of one and half frame ins.In view of fdd
The position of configuration srs may be indicated using 10 bit bit maps, tdd is possible to be multiplexed this form, i.e. unification will need
Signaling bit be set to 10 bits, uppts corresponds to subframe 1 and/or subframe 6, thus 10 bits indicate respectively corresponding son
The srs distribution condition of frame.
Second uppts configuring condition: it is assumed that uppts is made up of a sc-fdma symbol, and assume in uppts
Scfdma symbol predefines for srs transmission.
For configuration sequence number 0, in each 5ms cycle, in addition to uppts, separately there are 3 sub-frame of uplink, in this 3 sub-frame of uplink
In, may there are 0,1,2 or 3 subframes for transmitting srs, then possible position grouping just has:Kind, then can complete, with 3 bit signallings, the instruction that srs transmits subframe.In the case, also may be used
To be indicated using the method for bit map, such as: 000 represents the subframe not used for srs transmission, and 110 mean that subframe #2
It is used for sub-frame of uplink with subframe #3 to transmit.
So the rest may be inferred, in the case of can obtaining supposing that uppts is made up of a sc-fdma symbol, in configuration sequence number 1
In the case of 2, the indication bit number of needs is 2 and 1 bit respectively.
In standardized protocol specification, both can be come using different number of bit for the situation of different configuration sequence numbers
Represent the subframe for uplink srs, the situation such as configuration serial number 0,1 and 2 is referred to 3,2 and 1 bit respectively
Show resource；Can also be in order to simplify and integrated system form, unification is represented using bit number the longest for up srs transmission
Sub-frame of uplink number and location, such as unified using 3 bits instructions under the 5ms transfer point cycle specific srs transmission occupancy
Physical sub-frame number and position.Or, the bit number of fixing instruction srs position is k, and the value of k is more than or equal to 0 and is less than
3.Here, when the sub-frame of uplink number of half frame in is more than k, predefine k subframe therein and can transmit srs, for example, front k
Individual sub-frame of uplink.
Using identical principle, the configuration sequence number 3,4 and 5 to the 10ms change-over period, indicated with 3,2 and 1 bit respectively
Resource；Can also be in order to simplify and integrated system form, unification is represented using bit number the longest for up srs transmission
Sub-frame of uplink number and location, such as unification are using 3 bits instructions.Or, the bit number of fixing instruction srs position is k, k's
Value is more than or equal to 0 and is less than 3.Here, when the sub-frame of uplink number of half frame in is more than k, predefine k subframe therein
Srs can be transmitted, for example, front k sub-frame of uplink.
To configuration sequence number 6, the sub-frame of uplink number difference 1 of two and half frame ins, at this moment, can specify that the srs of two and half frame ins
Number is the same with position distribution, and to configure according to the fewer field of sub-frame of uplink number, that is, adopt 2 bit instructions；Or
Person, can specify that the srs number of two and half frame ins is the same with position distribution, and according to the more fields of sub-frame of uplink number
To configure, that is, to adopt 3 bit instructions.At this moment, if being assigned with subframe 4 for srs, and sub-frame of uplink number fewer half
The corresponding subframe (i.e. subframe 9) of frame in is not sub-frame of uplink, then automatically consider half fewer frame in of sub-frame of uplink number few
Individual srs position.Or, the bit number of fixing instruction srs position is k, and the value of k is more than or equal to 0 and is less than 2.Here, when half
When the sub-frame of uplink number of frame in is more than k, predefines k subframe therein and can transmit srs, for example, front k sub-frame of uplink.
For the form of simplified system specification, can not consider that the difference in transfer point cycle of 5ms or 10ms is unified
The signaling bit of needs is set to 3 bits, or unified the signaling bit of needs is set to k bit, the value of k is more than etc.
In 0 and less than 3.To the 5ms change-over period, this information indicates the position of the srs in each half frame in；Week is changed to 10ms
The configuration 3,4 and 5 of phase, this information indicates in each wireless frame in (or perhaps comprising half frame in of upstream time)
The position of srs；Configuration 6 to the 10ms change-over period, this information indicates the position of the srs in each half frame in.
To configuration sequence number 6, the sub-frame of uplink number difference 1 of two and half frame ins, the method for another distribution srs is to allow
It is different that srs is distributed in this two and half frame in.This is to need 5 bits to indicate, first field 3 bit and second field 2
Bit.
For the form of simplified system specification, the signaling bit needing is arranged by the frame format unification to all configuration sequence numbers
For 6 bits.Thus 6 bits indicate respectively the srs distribution condition of corresponding sub-frame of uplink.Here, to the 5ms change-over period, first 3
Bit and rear 3 bits indicate the srs position in the general sub-frame of uplink of one and half frame ins；To 10ms change-over period, front 3 ratios
The position of the srs in the special general sub-frame of uplink for first half frame in of instruction；Configuration 6 to the 10ms change-over period, first 5
Bit is used for indicating the position of srs.Or, the signaling bit of needs is set to 2k bit by unification, and the value of k is more than or equal to 0
And it is less than 3.To the 5ms change-over period, front k bit and rear k bit indicate respectively the srs position of one and half frame ins；Right
The 10ms change-over period, front k bit is used for the position of the srs of first half frame in of instruction；Configuration 6 to the 10ms change-over period,
Front k bit and rear k bit indicate respectively the srs position of one and half frame ins.
Uppts is made up of 2 sc-fdma symbols, and may be used to transmit the situation of srs.Corresponding to above
The first uppts configuring condition of description, that is, assume whether each the scfdma symbol in uppts needs signaling to refer to for srs
Show, using bit mapping method it indicates that when the bit number of srs resource location only comprises a scfdma symbol than uppts
Many 1.Corresponding to second uppts configuring condition described above, that is, predefine one or two scfdma in uppts
Symbol be used for srs, from without signaling indicate uppts in one or more scfdma symbol be used for srs it indicates that
The bit number of srs resource location and uppts only comprise identical during a scfdma symbol.
The ratio of signaling needs in last standardization agreement, both can be designed according to most bit numbers needing
Spy, that is, unify the bit number of the instruction srs position below each configuration sequence number；Can also according to configuration sequence number difference and
The difference of the sc-fdma number (1 or 2) of composition uppts separately designs the bit number of signaling needs.
In superincumbent indicating means, in order to indicate number of subframes and the position of transmission srs, some constraints can be increased and come
Save the signaling bit number needing to use.Such as, agreement only has continuous sc-fdma symbol to can be used for transmitting srs (continuously
Refer to that the subframe that two sc-fdma symbols are located is continuous subframe in time) etc..1 or 2 sc- including except uppts
Fdma is used for beyond srs transmission according to pre-defined mode, and it is from first sub-frame of uplink that system can also arrange srs resource
(subframe 2 or subframe 7) starts according to ascending order distribution；Or, srs resource be from every time up send the time period last
Subframe (subframe 4 or subframe 9) starts according to descending distribution.The side of the sub-frame of uplink of another kind of configuration transmission srs is described below
Method.The difference of the up-downgoing ratio according to tdd system, for transmitting the number of the Resource Block of control signaling in each sub-frame of uplink
It is probably different.At this moment, can preferentially transmit in the fewer sub-frame of uplink of the Resource Block number that control signaling takies
Srs, thus srs can transmit in relatively wide bandwidth, this is conducive to being carried out with srs using the symmetry of tdd channel descending
The scheduling of resource.
, for configuration sequence number 0, in each 5ms cycle, except uppts taking the above-mentioned configuring condition to second uppts as a example
Outward, separately there are 3 sub-frame of uplink, in this 3 sub-frame of uplink, may have 0,1,2 or 3 subframes for transmitting srs, so,
2 bits are needed to complete the instruction that srs transmits subframe.That is, 0 represents the subframe not used for srs transmission, and 2 mean that continuously
Two subframes (for example, subframe #2 and subframe #3) are used for srs and transmit.Similar, in the case of configuration sequence number 1 and 2, need
The indication bit number wanted is 2 and 1 respectively.
Similarly, the configuration sequence number 3,4 and 5 to the 10ms change-over period, indicates resource with 2,2 and 1 bit respectively；Also may be used
So that in order to simplify and integrated system form, unification represents the sub-frame of uplink for up srs transmission using bit number the longest
Number and location, such as unification are using 2 bits instructions.Or, the bit number of fixing instruction srs position is k, and the value of k is more than
Equal to 0 and less than 2.Here, when the sub-frame of uplink number of half frame in is more than k, predefining k subframe therein can transmit
srs；When the sub-frame of uplink number of half frame in is less than k, then the number of subframes of transmission srs is limited to the number of the sub-frame of uplink of reality
Mesh.
To configuration sequence number 6, the sub-frame of uplink number difference 1 of two and half frame ins, at this moment, can specify that the srs of two and half frame ins
Number is the same with position distribution, and to configure according to the fewer field of sub-frame of uplink number, that is, adopt 2 bit instructions；Or
Person, can specify that the srs number of two and half frame ins is the same with position distribution, and according to the more fields of sub-frame of uplink number
To configure, the bit number at this moment needing remains 2 bits.At this moment, if being assigned with subframe 4 for srs, and in sub-frame of uplink
The corresponding subframe (i.e. subframe 9) of half fewer frame in of number is not sub-frame of uplink, then automatically consider sub-frame of uplink number fewer
The few srs position of half frame in.Or, the bit number of fixing instruction srs position is k, and the value of k is more than or equal to 0 and little
In 2.Here, when the sub-frame of uplink number of half frame in is more than k, predefine k subframe therein and can transmit srs；Work as field
When interior sub-frame of uplink number is less than k, then the number of subframes of transmission srs is limited to the number of the sub-frame of uplink of reality.
In standardized protocol specification, both can be come using different number of bit for the situation of different configuration sequence numbers
Represent the subframe for uplink srs.For example, the situation for configuration serial number 0,1 and 2 is referred to 2,2 and 1 bit respectively
Show resource；For the form of simplified system specification, can not consider that the difference in transfer point cycle of 5ms or 10ms is unified to incite somebody to action
The signaling bit needing is set to 2 bits, or the signaling bit of needs is set to k bit by unification, and the value of k is more than or equal to
0 and be less than 2.To the 5ms change-over period, this information indicates the position of the srs in each half frame in；To the 10ms change-over period
Configuration 3,4 and 5, this information indicate each wireless frame in (or perhaps comprising half frame in of upstream time) srs
Position；Configuration 6 to the 10ms change-over period, this information indicates the position of the srs in each half frame in.
To configuration sequence number 6, the sub-frame of uplink number difference 1 of two and half frame ins, the method for another distribution srs is to allow
It is different that srs is distributed in this two and half frame in.This is to need 4 bits to indicate its srs configuration in the wireless frame in of 10ms, front 2
Individual bit and rear 2 bits indicate respectively the srs distribution in first field and second field 2.So, for simplified system
The form of specification, the signaling bit of needs is set to 4 bits by the frame format unification to all configuration sequence numbers, thus indicating 10ms
The srs configuration of wireless frame in.Here, to the 5ms change-over period, front 2 bits and rear 2 bits indicate the general of one and half frame ins
Srs position in sub-frame of uplink；To the 10ms change-over period, front 2 bits are used for the typically up son of first half frame in of instruction
The position of the srs of frame in；Configuration 6 to the 10ms change-over period, front 2 bits and rear 2 bits indicate the one of one and half frame ins
As srs position in sub-frame of uplink.Or, the signaling bit of needs is set to 2k bit by unification, and the value of k is more than or equal to 0
And it is less than 2.To the 5ms change-over period, front k bit and rear k bit indicate respectively the srs position of one and half frame ins；Right
The 10ms change-over period, front k bit is used for the position of the srs of first half frame in of instruction；Configuration 6 to the 10ms change-over period,
Front k bit and rear k bit indicate respectively the srs position of one and half frame ins.
Above method is the son that each field to a wireless frame in indicates respectively the transmission srs in addition to uppts
Frame number is it is also possible to only send parameter m to indicate the subframe of the transmission srs in addition to uppts of a wireless frame in
Number.To configuration sequence number 0,1,2 and 6, the subframe comprising srs m is assigned to two and half frame ins, for example, first half frame inIndividual subframe comprises srs；Second half frame in simultaneouslyIndividual subframe comprises srs.To configuration sequence number 3,4 and 5, m bag
Subframe containing srs is located at first half frame in.To lte tdd, because a wireless frame in contains up to 6 sub-frame of uplink, i.e. m
Maximum occurrences scope be 0～6, so instruction bit number be up to 3 bits.Specifically, can be joined with p bit
Put the subframe of the transmission srs in addition to uppts, the value of p is greater than equal to 0 and is less than or equal to 3.
Another kind of method is only to send parameter m to indicate the transmission srs in addition to uppts of every n wireless frame in
Number of sub-frames, and the sub-frame of uplink that this m comprises srs is distributed to n wireless frame in.For example, m comprises the up of srs
Subframe is evenly dispersed to each radio frames and half frame in as far as possible.Here being possible to of n wireless frame in can not be indicated
The sub-frame of uplink comprising srs number, and only indicate a part comprise srs sub-frame of uplink number value.
The symbol of predefined uppts can be used for srs, then can offset the side of s with cell srs period p+cell srs
Method, to indicate the subframe of the transmission srs in normal sub-frames, to have a sub-frame of uplink to be used for transmitting srs every time p, and
And first srs subframe is s with respect to the skew with reference to timing, can be first son in the period p time period with reference to timing
Frame.Taking lte tdd system as a example, to configuration sequence number 0,1,2 and 6, the possible value in cell srs cycle is 5,10,20,40,80,
160 and 320ms；To configuration sequence number 3,4 and 5, the possible value in cell srs cycle is 10,20,40,80,160 and 320ms.As
Fruit needs to support other periodic quantities, that is, the 5ms of 1ms, 2ms and configuration sequence number 3,4 and 5, then need these periodic quantities are carried out
Redefine.For example, the 1ms cycle can be defined as the symbol of all uppts and sub-frame of uplink can transmit srs；The 2ms cycle can
There are 2 positions can transmit srs to be defined as each half frame in；The 5ms of configuration sequence number 3,4 and 5 can be defined as each frame in
There are 2 positions can transmit srs.In order to reduce signaling consumption, the maximum that can join the cell srs cycle can be limited, for example, limit
The maximum that system can join the cell srs cycle is 40ms.To each cell srs period p, the sum of the sub-frame of uplink clocking in a p
It is fp.Then a kind of method is to define all f of cell srs period ppIndividual cell srs skew can configure.In order to reduce signaling
Expense, another kind of method is to a cell srs period p it is not necessary to indicate all fpIndividual possible cell srs deviant, that is,
To each possible cell srs periodic quantity p, the number limiting the cell srs skew that can indicate is fp′.For example, fp' be equal to 3 or
Person 1 etc..Thus, need in broadcast channel indicate probability sum be each cell srs period p available offset values
Sum.
When not considering to configure sequence number difference to design signaling, can be by under all situations, all subframes of 10ms
Distribution condition for srs transmission is indicated.When considering configuration sequence number difference, only configuration sequence number is the situation of #6
It is the resource distribution indicating the uplink srs in whole 10ms, other configurations sequence number #0-#5 is all referring to showing first field
Resource service condition, second field is according to circumstances obtained same resource distribution (situation of #1-#2) or is obtained sky
Resource distribution (situation of #3-#5).
Step 2 in invention) in, base station sends the dispatch of transmission srs to ue, and scheduling ue is available in network configuration
The uplink channel resources specified are selected to transmit srs signal in the uplink channel resources of transmission srs signal.
Referring still to the configuration of the different up-downgoing ratios of lte tdd in form one, step 2 problem to be solved is to accuse
Tell that ue concrete this user of those resources in the resource that step one indicates can use, specifically include following main points: step 2
Completed by rrc signaling；Step 2 by ue instruction cyclic shift, comb, srs bandwidth, the initial frequency resource of srs,
The information of the sub-frame and srs transmission cycle using.The inventive point of the present invention is how usage cycles configured transmission and referring to
The method showing specifically used sub-frame, the transmission to other specification, identical with the method for designing of current lte fdd.
At present, in lte fdd this parameter of srs cycle be 2ms, 5ms, 10ms, 20ms, 40ms, 80ms, 160ms,
320ms } one of numerical value.In lte fdd, system to ue send the cycle signaling after, ue will according to cycle parameter with
Using sub-frame parameter instruction find can using sub-frame transmit.Below, for lte tdd, according to
Different srs transmission cycle parameters, the specific work process of classified description:
Classification one: system transfers srs cycle parameter is 2ms
In lte tdd, when this cycle parameter is 2ms, for the situation configuring sequence number 0-2 in form 1, work as step
When rapid one each half frame in distributes sub-frame of uplink (the including uppts) number of srs less than or equal to 2, all of subframe is all used
Transmit it is not necessary to signaling explicitly indicates in srs；When the number of subframes of up step one distribution is more than 2, the present invention refers to
2 sc-fdma symbol transmission srs are selected the fixed transmission srs resource from step one configuration.
When this cycle parameter is 2ms, for the situation configuring sequence number 3-5 in form 1, in the present invention, a kind of
Method is to specify all srs transfer resources specified in step one all for transmitting the srs of this ue.Such regulation considers
, the srs transfer resource in these three configurations in the 10ms cycle is limited, thus maximally utilising Radio Resource symbol
Transmission srs.Another kind of method is it is contemplated that tdd does not need excessive up srs transmission sub-frame, considers and configuration simultaneously
Sequence number 0-2 is consistent, i.e. in step one, when sub-frame of uplink (the including uppts) number that each half frame in distributes srs is less than
When equal to 2, all of subframe is all used for srs transmission；When the number of subframes of up step one distribution is more than 2, this
Invention is specified and is selected 2 sc-fdma symbol transmission srs from the transmission srs resource of step one configuration.
When this cycle parameter is 2ms, for the situation configuring sequence number 6 in form 1, there are three kinds of methods can be with work
Make.Method one: the srs number of regulation two and half frame ins is the same with position distribution, thus identical with the principle of configuration sequence number 0-2,
When sub-frame of uplink (the including uppts) number that each half frame in of step one distributes srs is less than or equal to 2, all of subframe
All it is used for srs transmission；When the number of subframes of up step one distribution is more than 2, the present invention specifies from step one configuration
2 sc-fdma symbol transmission srs are selected in transmission srs resource.Method two: when step one the wireless frame in of 10ms distribute upper
When row number of subframes is less than or equal to 4, all of subframe is all used for srs transmission；Number of subframes when the distribution of up step one
When more than 4, the present invention specifies and selects 4 sc-fdma symbol transmission srs from the transmission srs resource of step one configuration.Side
Method three: when step one is less than or equal to 5 in the sub-frame of uplink number that the wireless frame in of 10ms is distributed, all of subframe is all used for
Srs transmits；When up step one is more than 5 in the number of subframes that the wireless frame in of 10ms is distributed, the present invention specifies from step
5 sc-fdma symbol transmission srs are selected in the transmission srs resource of one configuration.
From the system transfers srs Radio Resource that step one is distributed, some ue is carried out resource distribution instruction when
Wait, both can be from all available resources (by uppts and can be used for of including in other upstream data subframes not comprising uppts
The sc-fdma symbol composition of transmission srs) in arbitrarily select sc-fdma symbol transmission srs it is also possible to add constraint.
According to system configuration, it is determined whether allow two sc-fdma symbols in uppts can be simultaneously allocated to same
Ue is using transmitting srs.So, a kind of possible constraint is that at most to have one in the sc-fdma symbol that regulation uppts comprises
Individual sc-fdma symbol can select to distribute to some ue using transmitting srs.That is, to the 2ms srs cycle, distribute to user
The position of the srs of equipment be one in uppts, another is in general descending sub frame simultaneously；Or, the position of two srs
Put is all in general descending sub frame.Alternatively possible constraint is to limit to select two srs positions from available srs position
Method.Remembering that half frame in is m for the symbol numbers of srs, if then supporting all of selection mode, needing the selection mode of instruction
Number beThis numerical value may ratio larger, thus indicating the overhead bit of these selection modes than larger.In order to reduce
Instruction expense, only can specify thatA part of available in individual selection mode.For example, a kind of possible restriction is in uppts
Two scfdma symbols can not be simultaneously allocated to same user equipment；Alternatively possible restriction is to make to distribute to user to set
That is, or be two srs symbols in uppts standby two srs are continuous,；Or in uppts and up son behind
Frame；Or in two continuous sub-frame of uplink.
Alternatively possible constraint is that first field is as far as possible symmetrical with the physical resource that second field srs takies.
Specifically, for the subframe of 4 transmission srs of method one distribution, when distribution, ensure to distribute two in first field
Individual, distribute two in second field；For the subframes of 5 transmission srs of method two distribution, ensure when distribution the
Distribute two in one field, when distribution three in second field or distribution, ensure distribution in first field
Three, in second field, distribute two.
Classification two: system transfers srs cycle parameter is 5ms
In lte tdd, when this cycle parameter is 5ms, for the situation configuring sequence number 0-2 in form 1, this
Bright specifying selects 1 sc-fdma symbol transmission srs from the transmission srs resource of step one configuration.
When this cycle parameter is 5ms, for the situation configuring sequence number 3-5 in form 1, when in step one, configuration is used
When the number of subframes of srs transmission is less than or equal to 2, the subframe of all step one configurations is all used for srs transmission, when step one
In be configured to srs transmission number of subframes be more than 2 when, the present invention specify from step one configuration transmission srs resource
Select 2 sc-fdma symbol transmission srs.
When this cycle parameter is 5ms, in form 1 configure sequence number 6 situation, when in step one in 10ms no
When line frame in is configured to the number of subframes of srs transmission less than or equal to 2, the subframe that all steps one configure all is given tacit consent to permissible
For srs transmission, when the number of subframes being configured to srs transmission in the wireless frame in of 10ms in step one is more than 2, this
Bright specifying selects 2 sc-fdma symbol transmission srs from the transmission srs resource of step one configuration.From the angle simplifying system design
Degree sets out, and can add following constraint, and that is, the sc-fdma symbol one of this two distribution transmission srs is in first field
(5ms), one in second field (5ms).And the sc-fdma position of two transmission srs is as symmetrical as possible, that is, distinguish
Using the sub-frame transmission srs in the symmetric position in two fields, such as, when using the #1 in first field or
When (#2) or (#3) individual sub-frame transmission srs, then specify respectively using the #6 on the 2nd field or (#
7) a sc-fdma symbol or on (#8) individual sub-frame sends srs.When using the #4 in first field
When sub-frame transmission srs, then can specify that using a sc- on the #8 sub-frame on the 2nd field
Fdma symbol sends srs.
Classification three: system transfers srs cycle parameter is other cycles in addition to 2ms and 5ms, including 10,20,40,
80,160 and 320ms
Can be designed according to lte fdd identical principle.
In the control signaling of the special srs that base station sends to user equipment, in order to indicate the srs symbol distributing to user equipment
Number time location, a kind of method is the method using srs cycle+subframe configured information.User equipment determines first to be distributed to
First radio frames that its srs symbol is located, this can pass through meter according to the radio frame number that its special srs control signaling is located
Obtain, for example, first radio frame number that its srs symbol is located is equal to the radio frame number that its special srs control signaling is located.
Or, first radio frame number that its srs symbol is located is radio frame number s that special srs control signaling is locatedctrlAccording to one
The result that individual numerical value q is quantified, that is,OrQ can be certain fixing numerical value；Or q relies on
In the srs period p of user equipment, for example, q=p；Here, q is the factor of sfn repetition period, and that is, q is 2 power.Or, its
First radio frame number that srs symbol is located is radio frames s that special srs control signaling is locatedctrlOr after its quantization
The time started of radio frames obtains plus after the delay, τ of a fixation, i.e. sctrl+ τ, orOrτ can be predefined or configure in broadcast channel.Or, by the special srs in user equipment
In signaling, display indicates first radio frame number that its srs symbol is located；Or wrap in the special srs signaling of user equipment
Containing its srs symbol be located radio frame number a part of information, thus according to special srs control signaling be located radio frame number and
The partial information of the radio frame number that the srs symbol in special srs control signaling is located, is calculated the srs symbol of user equipment
First radio frames being located.Next, the number of the srs symbol of one wireless frame in of note is up to m, then to configuration sequence number
0th, the periodic quantity more than or equal to 10ms of 1,2 and 6 periodic quantity more than or equal to 5ms and configuration sequence number 3,4 and 5, Yong Hushe
One of m srs symbol of standby occupancy position, signaling bit number is ceil (log2(m)).To the 2ms cycle, in rrc signaling
Subframe configured information need be newly defined as instruction two srs symbols combination index, by limit in m symbol choosing
Select the number of the available combination of 2 symbols so as to be less than or equal to ceil (log2(m)), then user equipment takies 2 srs symbols
Ceil (log can also be used2(m)) individual bit instruction.Thus when the various srs cycle, the bit number of subframe configured information is constant,
Ensure that the uniform structure of rrc signaling.Similarly, the 5ms cycle to configuration sequence number 3,4 and 5, the subframe instruction in rrc signaling
Information needs to be newly defined as the index of the combination of two srs symbols of instruction, and limits the available combination selecting 2 srs symbols
Number so as to be less than or equal to ceil (log2(m)), then user equipment takies 2 srs symbols and can also use ceil (log2(m))
Individual bit instruction.Thus when the various srs cycle, the bit number of subframe configured information constant it is ensured that the consistent knot of rrc signaling
Structure.
In the control signaling of the special srs that base station sends to user equipment, in order to indicate the srs symbol distributing to user equipment
Number time location, another kind of method is only instruction srs cycle, and the radio frames that the srs symbol of user equipment is located and subframe
It is all to be determined by implicit method.The srs cycle of the user equipment of note base station configuration is p ms, then have a son every p ms
Frame distributes to this user equipment.Because there is p subframe in period p, user equipment needs to know which in this p subframe
Individual it is allocated to oneself.Here, can be used for determining that the information of subframe position includes: srs period p, srs dedicated control signaling institute
Radio frame number sctrl, the position of srs symbol of cell configuration in period p and number np, and customer equipment identification u
Deng.When the srs cycle of user equipment being equal to the cell srs cycle, the srs symbol of user equipment is just in all cell configuration
On srs symbol.When the srs cycle of user equipment being more than the cell srs cycle, imply the srs symbol determining user equipment in week
The method of the index in all available srs symbol in phase p can be isrs=f (u, sctrl, np), such as isrs=mod (u,
np), or isrs=mod (u+sctrl, np) etc..As such, it is possible to from the beginning of certain reference time position, implicit determination
Srs symbol, that is, i-thsrsIndividual srs symbol, distributes to this user equipment, and repeats this distribution according to period p.Here, reference
Time location can be radio frames s that srs dedicated control signaling is locatedctrlTime started position.Also may be used in reference time position
To be radio frames s that srs dedicated control signaling is locatedctrlThe result that quantified according to a numerical value q, i.e. the reference time
Sfn isOrQ can be certain fixing numerical value；Or q depends on the srs cycle of user equipment
P, for example, q=p；Here, q is the factor of sfn repetition period, and that is, q is 2 power.Reference time position can also be special in srs
Radio frames s being located with control signalingctrlOr after the time started of the radio frames after its quantization adds the delay, τ of a fixation
Obtain, i.e. sctrl+ τ, orOrτ can be predefined or in broadcast channel
Configuration.Or reference time position is using other definition methods.This method both can be used for fdd it is also possible to be used for tdd.
2ms cycle to tdd system and 5ms cycle, as it is possible that be to the weight distributing two srs symbols in 5ms or 10ms
Definition.So the srs cycle to both user equipmenies, its actual cycle is p (5ms or 10ms), and is in period p
Two srs positions of interior distribution.The method implying distribution above stands good, for example implicit first determine user equipment first
The position of srs symbol, then obtains the position of second srs symbol.
For classification one above, classification two and classification three, for no matter configure sequence number any one sequence number in the case of,
Both can also be able to be adopted using elongated signaling when the physical resource indicating srs transmission occupancy in this step using signaling
Signaling with fixed length.Elongated Signalling length is to rely on the available physical sub-frame resources in step one, the Signalling Designing of fixed length
Can be assumed that all of sub-frame of uplink all may be distributed to srs in step one and transmit to use.Standard agreement finally can select
Select is elongated signaling or fixed length signaling.
Because when configure sequence number different when, the Signalling Designing of either elongated or fixed length, to different configurations
The bit number that the signaling of sequence number design needs may identical it is also possible in order to pursue uniform format, and adopt used in the case of
Need the bit number that is used in the case that bit number is the longest as the number of signaling bit.Or, fix and adopt k bit
To indicate, the value of k is greater than equal to 0 and is less than max. number of bits here.
Step 3 in invention) in, ue receives the uplink channel resources information that can be used for transmission srs signal of network configuration
Dispatch with transmission srs.
In this step, ue receives the uplink channel resources that can be used for transmission srs signal of network configuration by d-bch,
Ue passes through rrc signalling and obtains the concrete dispatch transmitting srs, obtains this ue and transmit srs needs from dispatch
Concrete physical channel resources.
Step 4 in invention) in, ue sends the srs signal previously generating on the uplink channel resources of network scheduling.?
In this step, ue generates basic srs sequence according to the sequence generating method of srs in advance, and basis obtains in step 3 simultaneously
Srs transmitting scheduling information, the such as information of the transmission bandwidth of cyclic shift, srs and comb, specifically obtain ue and finally send out
The srs sequence sent, after the amplitude of transmit power being weighted using power factor changing, is specified in dispatch
Srs signal is sent on physical resource.
When two scfdma symbols allowing user equipment to take uppts send srs simultaneously, and ue sends not respectively
The srs of same transmitting antenna requires time for it is contemplated that changing between the antenna of user equipment, and system can predefine in uppts
The transmission timing advance regular hour τ of first scfdma symbol；And second scfdma symbol in uppts is according to original
Transmission timing send, thus between two scfdma symbols of uppts generation time be τ interval be used for antenna change.
This time τ is equally beneficial for the rising edge of different user devices signal and trailing edge on two scfdma symbols of uppts
Between interference.Here the size of τ depends on the hardware realization of user equipment, needs to define the tool of this parameter from standard
Body value.This value is probably to derive from the requirement to capabilities of user devices for the ran4.
With reference to figure four, this device is connect assembly of the invention (406) by srs sequence generating module (401), srs configuration information
Receive module (402), srs schedule information receiver module (403), srs sequence transmission controller (404) and power factor adjusting module
(405) form.For the ue of two transmission antennas, the srs sequence that produces through this device through an antenna (407 or
408) complete srs transmission, the selection of transmission antenna can be that network passes through rrc signal deployment or according to system default
Configuration replaces transmission in 2 antennas.For the ue of single antenna, srs directly sends on single antenna.
Embodiment
This part gives ten embodiments of this invention.Description in order to avoid making this patent is excessively tediously long, below
Explanation in, omit the detailed description to the function known to the public or device etc..
First embodiment:
The situation of serial number 0 is configured in the corresponding form one of the present embodiment.
First, network includes uppts (606), sub-frame2 by the ascending resource that d-bch configuration can transmit srs
(603), sub-frame3 (604) and sub-frame4 (605), wherein, uppts be made up of 2 sc-fdma symbols (609,
610).
Secondly, the cycle that network signals ue transmission srs by rrc is 2ms, and network is also signaled with rrc simultaneously
The sub-frame of uplink resource that ue transmits srs is sub-frame2 (603) and sub-frame3 (604).
Then, ue obtains the physical resource Information that the srs transmission in both the above step uses, on sub-frame2
A sc-fdma symbol (608) on (607) and sub-frame3 on one sc-fdma symbol sends srs signal.
Second embodiment:
The situation of serial number 1 is configured in the corresponding form one of the present embodiment.
First, network is included on sub-framel (502) by the ascending resource that d-bch configuration can transmit srs
Uppts (506), sub-frame2 (503) and sub-frame3 (504), wherein, uppts is made up of a sc-fdma symbol.
Secondly, the cycle that network signals ue transmission srs by rrc is 2ms, and network also uses rrc signaling signaling simultaneously
Notify uppts and sub-frame2 that the sub-frame of uplink resource that ue transmits srs is on sub-framel.
Then, ue obtains the resource information in both the above step, uppts a sc-fdma symbol (506) and
A sc-fdma symbol (507) on sub-framel is upper to send srs signal.
3rd embodiment:
The situation of serial number 3 is configured in the corresponding form one of the present embodiment.
First, network includes uppts (704), sub-frame2 by the ascending resource that d-bch configuration can transmit srs
(701), sub-frame3 (702) and sub-frame4 (703), wherein, uppts is made up of a sc-fdma symbol.
Secondly, the cycle that network signals ue transmission srs by rrc is 2ms, and network is also signaled with rrc simultaneously
The sub-frame of uplink resource that ue transmits srs is uppts and sub-frame2.
Then, ue obtains the resource information in both the above step, on the sc-fdma symbol of uppts (704) and
Sc-fdma symbol (705) on sub-frame2 is upper to send srs signal.
Fourth embodiment:
The situation of serial number 6 is configured in the corresponding form one of the present embodiment.
First, network includes uppts (806,808), sub- by the ascending resource that d-bch configuration can transmit srs
Frame2 (801), sub-frame3 (802), sub-frame4 (803), sub-frame7 (804) and sub-frame8 (805),
Wherein, uppt s is respectively made up of a sc-fdma symbol.
Secondly, the cycle that network signals ue transmission srs by rrc is 5ms, and network is also passed with signaling ue simultaneously
The sub-frame of uplink resource of defeated srs is sub-frame2 and sub-frame7.
Then, ue obtains the resource information in both the above step, on sub-frame2 a sc-fdma symbol
(807) a sc-fdma symbol (809) and on sub-frame7 is upper to send srs signal.
5th embodiment:
The sc-fdma symbol that hypothesis system predefines in uppts is used for srs to be transmitted, and limits the maximum of each half frame in
The number of srs symbol be 4.I.e. when uppts comprises a sc-fdma, it is up to three sub-frame of uplink in half frame in and is used for
Transmission srs, that is, the probable value needing the srs symbol numbers in broadcast channel instruction is 0,1,2 and 3；When uppts comprises two
During sc-fdma, it is up to two sub-frame of uplink in half frame in and is used for transmitting srs, that is, need the srs symbol in broadcast channel instruction
The probable value of number is 0,1 and 2, and this two sub-frame of uplink can be the interior available sub-frame of uplink of the first two of field.So,
In broadcast channel, need to indicate the number of sub-frames of transmission srs with 2 bits, thus the symbol numbers with reference to uppts obtain
The srs symbol numbers of each field and wireless frame in.
When base station send one user equipment of rrc signal deployment srs when, to configuration sequence number 0,1,2 and 65,10,20,
40th, 40,160 and 320ms cycle, because the position of be up to 8 transmission srs of each wireless frame in, need to be compared with 3
Refer in particular to show the position of the srs symbol of user equipment occupancy.
In cycle to the 2ms of configuration sequence number 0,1,2 and 6, it indicates that in half frame in be 2 srs symbols of user equipment allocation.
Here, 2 srs symbols being limited in each half frame in are continuous in position, then because each half frame in srs symbol
Big number is 4, then the combination of two possible srs symbols has 3, is 6 in the possible combined number of a wireless frame in, thus
Still can be indicated with 3 bits.Note that the symbol numbers of the srs configuring each half frame in broadcast channel are less than 2,
Then the 2ms cycle is unavailable, or is construed to all srs symbols of half frame in and is distributed on this user equipment.
To configuration sequence number 3,4 and 5, the cycle to 10,20,40,40,160 and 320ms, because each wireless frame in is most
There are the positions of 4 transmission srs it is possible to the position of srs symbol with 2 bit instruction user hold facilities, if necessary
Keep the bit number of various configuration sequence numbers consistent, it is possible to use 3 bits.
In 2ms (or 5ms) cycle to configuration sequence number 3,4 and 5, it indicates that in wireless frame in be user equipment allocation 2
Srs symbol.Here, 2 srs symbols being limited in half frame in are continuous in position, then because the srs symbol of each half frame in
Number maximum number is 4, then the combination of two possible srs symbols has 3 it is possible to be accounted for 2 bit instruction user equipment
The position of srs symbol, keeps the bit number of various configuration sequence numbers consistent, it is possible to use 3 bits if necessary.Note
If it is unavailable that the symbol numbers configuring the srs of wireless frame in broadcast channel are less than 2,2ms (or 5ms) cycle, or
The all srs symbols being construed to wireless frame in are distributed on this user equipment.
Then, ue obtains the resource information in both the above step, and corresponding srs symbol sends srs signal.
Note, when uppts comprises two sc-fdma, if allowing to be used in half frame in be up to three sub-frame of uplink
Transmission srs, that is, the probable value needing the srs symbol numbers in broadcast channel instruction is 0,1,2 and 3, in broadcast channel still
Need to indicate the number of sub-frames of transmission srs with 2 bits.But it is because that each wireless frame in is up to 10 srs symbols, institute
In the special srs control signaling of user equipment, to need to indicate, using 4 bits, the srs symbol distributing to user equipment
Position.
Sixth embodiment:
The method that the present embodiment describes a kind of indicating cell srs character position in broadcast channel of the present invention.Here false
If the available resources of uppts do not need broadcast signaling to indicate, if that is, the resource of uppts is not taken by RACH,
Then give tacit consent to for srs.Do not repeating in explained below.It is the srs in other sub-frame of uplink in addition to uppts shown in table 1
Configuration, needs exist for sending this information using 4 bits in broadcast channel.Here, 10 numerals of subframe sequence number are divided
Do not represent the configuring condition of each subframe in a wireless frame in, 0 representative does not comprise srs, and 1 representative is configured with srs.
Table 1: the srs configuration in other sub-frame of uplink in addition to uppts
| Configuration sequence number | System Frame Number sfn | Subframe sequence number | Description |
| 0 | Any sfn | 0000000000 | There is no srs symbol |
| 1 | The sfn of mould more than 40 | 0010000000 | The 40ms cycle |
| 2 | The sfn of mould more than 41 | 0010000000 | The 40ms cycle |
| 3 | The sfn of mould more than 42 | 0010000000 | The 40ms cycle |
| 4 | The sfn of mould more than 43 | 0010000000 | The 40ms cycle |
| 5 | Even number sfn | 0010000000 | The 20ms cycle |
| 6 | Even number sfn | 0000000100 | The 20ms cycle |
| 7 | Odd number sfn | 0010000000 | The 20ms cycle |
| 8 | Odd number sfn | 0000000100 | The 20ms cycle |
| 9 | Appoint and watch sfn | 0010000000 | The 10ms cycle |
| 10 | Appoint and watch sfn | 0000000100 | The 10ms cycle |
| 11 | Any sfn | 0010000100 | The 5ms cycle |
| 12 | Any sfn | 0011000100 | 3 srs symbols are comprised in 10ms |
| 13 | Any sfn | 0011000110 | 4 srs symbols are comprised in 10ms |
| 14 | Any sfn | 0011100110 | 5 srs symbols are comprised in 10ms |
| 15 | Any sfn | 0011100111 | 6 srs symbols are comprised in 10ms |
Note, mainly propose the configuring condition of srs in 16 here, be not intended to limit configuration sequence number corresponding specific that
Configuration.According to system design, all 16 above-mentioned configuring conditions can not be defined, and only configure one of subset, this
Individual subset is still within protection scope of the present invention.For example, a kind of method selecting subset is using the configuration sequence number in table 1
0th, 5,9,11,12,13,14 and 15, thus only need to 3 bits indicating in broadcast channel.
Table 2 is the srs configuration in another possible other sub-frame of uplink in addition to uppts.
Table 2: the srs configuration in other sub-frame of uplink in addition to uppts
Note, mainly propose the configuring condition of srs in 16 here, be not intended to limit configuration sequence number corresponding specific that
Configuration.According to system design, all 16 above-mentioned configuring conditions can not be defined, and only configure one of subset, this
Individual subset is still within protection scope of the present invention.
Signaling bit number if necessary to keep fdd with tdd system is consistent, and that is, fdd needs also exist for being referred to 16 bits
Show cell srs resource, then can be configured using Table 3 below.Here, srs offset index can be equal to srs place subframe one
Index in the individual cycle, or srs offset index is mapped to rope in a cycle for the srs place subframe by some way
Draw.
The srs configuration of table 3:fdd
| Configuration sequence number | The cell srs cycle (ms) | Srs offset index | Description |
| 0 | No | No | There is no srs |
| 1 | 40 | 0 | The 40ms cycle |
| 2 | 40 | 1 | The 40ms cycle |
| 3 | 40 | 2 | The 40ms cycle |
| 4 | 20 | 0 | The 20ms cycle |
| 5 | 20 | 1 | The 20ms cycle |
| 6 | 20 | 2 | The 20ms cycle |
| 7 | 10 | 0 | The 10ms cycle |
| 8 | 10 | 1 | The 10ms cycle |
| 9 | 10 | 2 | The 10ms cycle |
| 10 | 5 | 0 | The 5ms cycle |
| 11 | 5 | 1 | The 5ms cycle |
| 12 | 5 | 2 | The 5ms cycle |
| 13 | 2 | 0 | The 2ms cycle |
| 14 | 2 | 1 | The 2ms cycle |
| 15 | 1 | 0 | The 1ms cycle |
7th embodiment:
The method that the present embodiment describes a kind of indicating cell srs character position in broadcast channel of the present invention.Here with
As a example lte tdd system, uppts may comprise one or two scfdma symbols, when uppts comprises a scfdma symbol
Number, this symbol is used for srs；When uppts comprises two scfdma symbols, this two symbols are all used for srs, or this two symbols
Number the resource in addition to the resource for Stochastic accessing be used for srs.As such, it is possible in the broadcast signaling of configuration srs, use
1 bit information is indicating the number of scfdma symbol that uppts comprises.
At this moment, still can be indicated in addition to uppts using the table 1 in embodiment six or table 2 or one part
Other sub-frame of uplink in srs configuring condition, and increase by 1 bit to indicate the number of symbols of uppts, i.e. the one of ppts
Or two scfdma symbols are used for srs, thus indicating complete srs configuration information.For example, dial gauge 1 or table two
All possible configurations need 4 bits, increase the configured information of the uppts number of symbols of a bit, thus in broadcast channel
In the bit number of configuration srs character position be 5 bits.When only using table 1 or table 2 a subset when, for example with
Configuration sequence number 0,5,9,11,12,13,14 and 15 in table 1 is it is only necessary to 4 bits indicate srs configuration letter in broadcast channel
Breath.
8th embodiment:
The present embodiment describes a kind of method indicating tdd system configuration in broadcast channel of the present invention, here with lte
As a example tdd system, methods described is equally applicable to there is other tdd systems being similarly configured.In lte tdd system, table 4 is
The configuring condition of special subframe (dwpts, gp and uppts), as shown in table 4, the number of configuration sequence number is 9, so needing 4 ratios
Spy indicates this information in broadcast channel.Table 5 is the configuring condition of the ascending-descending subframes distribution of tdd system, and that is, tdd supports 7 altogether
Plant configuration, as such, it is desirable to 3 bits indicate this information in broadcast channel.In sum, joining when separate dial gauge 4 and table 5
During confidence breath, broadcast channel needs altogether 7 bits.
Table 4: the configuration of special subframe
Table 5: ascending-descending subframes distribution
In order to reduce signaling consumption, combined coding can be carried out to the configuration of table 4 and table 5.So, because table 4 includes 9
Configuration, and table 5 includes 7 configurations, so in combined coding, the configuration sum needing instruction is 9 × 7=63, as long as so 6
Individual bit just completes the instruction of the configuration information to this table 4 and table 5.Configuration serial number k of note combined coding, k=0,1,
2 ..., 62, the method describing two kinds of possible combined codings below.A kind of method of possible combined coding is definition
The configuration sequence number of the ascending-descending subframes distribution in corresponding table 5；And define the configuration sequence of the special subframe in the corresponding table 4 of mod (k, 9)
Number.Or, the method for alternatively possible combined coding is definitionThe configuration sequence number of the special subframe in corresponding table 4；And
Define the configuration sequence number of the ascending-descending subframes distribution in the corresponding table 5 of mod (k, 7).The present invention does not limit using two kinds of connection above
The method compiling in collaboration with code, but can be with other coded methods thus reaching the mesh of the configuration information with 6 bit transfer tables 4 and table 5
's.
9th embodiment:
The present embodiment describes two examples when cell srs cycle maximum is 10ms for the present invention.If it is assumed here that
The resource of uppts is not taken by RACH, then give tacit consent to for srs.In table 6, tsfcIt is the cell srs cycle, δsfc
It is cell srs symbol offset.Here, arrange δsfcEach numerical value be subframe sequence number, that is, correspond to subframe 0～subframe 9.First half
The corresponding subframe numbers of uppts of frame in are 1, and the corresponding subframe numbers of uppts of second half frame in are 6.As shown in table 6, to joining
Put sequence number 0～13, uppts is to be defaulted as srs.Configuration sequence number 14 is used for indicating that current area does not configure srs.In tdd system
In, it is not required.As long as because base station configuration only transmits srs in uppts, for example, it is configured with srs configuration sequence number 0, then
Base station can not send special srs configuration signal to any user, thus not there being any srs to transmit.So will not be to being
The uplink of system has any harmful effect, because base station does not configure srs symbol in general sub-frame of uplink.So configuration
Sequence number 14 can retain it is also possible to remove.In addition, the present invention do not limit using configuration sequence number 0～13 in whole or one
Distribution is put.
The srs configuration of table 6:tdd
| Configuration sequence number | tsfc | δsfc |
| 0 | 5 | {1} |
| 1 | 5 | { 1,2 } |
| 2 | 5 | { 1,3 } |
| 3 | 5 | { Isosorbide-5-Nitrae } |
| 4 | 5 | { 1,2,3 } |
| 5 | 5 | { 1,2,4 } |
| 6 | 5 | { 1,3,4 } |
| 7 | 5 | { 1,2,3,4 } |
| 8 | 10 | { 1,2,6 } |
| 9 | 10 | { 1,3,6 } |
| 10 | 10 | { Isosorbide-5-Nitrae, 6 } |
| 11 | 10 | { 1,6,7 } |
| 12 | 10 | { 1,6,8 } |
| 13 | 10 | { 1,6,9 } |
| 14 | Do not configure srs | n/a |
Table 7 is alternatively possible collocation method, and configuration sequence number 11～16 is that correspondence is asymmetrical in 10ms here
Srs configures, and the number configuring sequence number in current table 7 is more than 16, so needing to select most 16 from table 7, thus ensureing to need
The bit number wanted is 4 bits.For example, it is possible to retain configuration sequence number 0～10, and from configuration sequence number 11～16 and configuration sequence number 17
At most select 5, thus total number is less than or equal to 16.For example, it is possible to option and installment sequence number 11～13 and configuration sequence number 17, from
And and configuration sequence number 0～10 constitute the form of 15, total bit number is 4 bits.
The srs configuration of table 7:tdd
Tenth embodiment:
The present embodiment describes the other example when cell srs cycle maximum is 10ms for the present invention.Here, mainly
It is to the 10ms cycle, increased and only in the uppts of a field of each frame, configure srs, and only increased in each frame
Configuration srs in the uppts of one normal sub-frames and a field, thus neighbor cell can pass in the uppts of different timing
Defeated srs, it is to avoid the srs in uppts interferes.Here, the general subframe for srs and the uppts for srs may be located at
Identical field or different fields.In fact, joining in normal sub-frames of each frame and the uppts of a field
Put the situation configuring srs in the situation of srs, and the uppts of normal sub-frames in each frame and two fields, this enforcement
Example only lists several available collocation methods, in fact, when there being remaining unused configuration sequence number, can indicate more configurations
Situation.
In the option one of table 8, remain the configuration sequence number 0～13 of table 6, increased two configuration sequence numbers, wherein, configuration
Sequence number 14 is only to configure srs in the uppts of first field of each frame；Configuration sequence number 15 is only second in each frame
Configuration srs in the uppts of field.
In the option 2 of table 8, remain the configuration sequence number 0～10 of table 6, and increased the configuration sequence number 14 of table 8 option one
With 15.
In the option 3 of table 8, remain the configuration sequence number 0～7 of table 6, and change configuration sequence number 8～10.Configuration sequence number 8
～10 is to have a general sub-frame transmission srs in a frame in, simultaneously only in the uppts transmission srs of a field of a frame.
General subframe for srs and the uppts for srs may be located at identical field or different fields.Table 8 option 3 is
Assume that they are located at identical field.
In the option 4 of table 8, it is the configuration sequence number 14 and 15 that increased table 8 option one on the basis of table 8 option 3.
The option 5 of table 8, is the result combining table 8 option 2 and table 8 option 4.
The srs configuration of table 8:tdd
Although above show the present invention already in connection with the preferred embodiments of the present invention, those skilled in the art will
It will be appreciated that without departing from the spirit and scope of the present invention, the present invention can be carried out with various modifications, replace and change
Become.Therefore, the present invention should not be limited by above-described embodiment, and should be limited by claims and its equivalent.
Claims (13)
1. a kind of sending method of uplink detection reference signal srs, including step:
A) obtain and can be used for transmitting the cycle parameter of uplink channel resources of detection reference signal srs and the position of sc-fdma symbol
Put；
If b) described cycle parameter is 2ms or is 5ms, ue sends the srs letter previously generating with the actual cycle obtaining
Number.
2. method according to claim 1 is it is characterised in that in step a), uppts gives tacit consent to for transmitting srs, and
The situation configuring srs in general sub-frame of uplink is indicated in broadcast channel.
3. method according to claim 2 is it is characterised in that to the 5ms cell srs cycle, each frame in only has uppts to use
In srs.
4. method according to claim 2 is it is characterised in that to the 5ms cell srs cycle, indicate the general of each field
Srs symbol is comprised in subframe.
5. method according to claim 2 is it is characterised in that to the 5ms cell srs cycle, indicate two of each field
General subframe comprises srs symbol.
6. method according to claim 2 is it is characterised in that to the 5ms cell srs cycle, indicate 3 one of each field
As subframe comprise srs symbol.
7. method according to claim 2 is it is characterised in that to the 10ms cell srs cycle, indicate one one of each frame
As subframe comprise srs symbol.
8. method according to claim 2 is it is characterised in that to the 10ms cell srs cycle, indicate two one of each frame
As subframe comprise srs symbol, and this two general subframes are different in the position of half frame in.
9. method according to claim 1 is it is characterised in that in step a), indicate uppts and in broadcast channel
As in sub-frame of uplink configuration srs situation.
10. method according to claim 9 is it is characterised in that to the 10ms cell srs cycle, indicate one of each frame
Uppts is used for transmitting srs.
11. methods according to claim 9 are it is characterised in that to 10ms cell srs cycle, a field of each frame
Uppts in configuration srs.
12. methods according to claim 9 are it is characterised in that to the 10ms cell srs cycle, indicate one of each frame
Configuration srs in the uppts of normal sub-frames and a field.
A kind of 13. lte tdd ue send the device (406) of srs, are made up of lower part:
Module (401), for producing srs sequence；
Module (402), for receiving srs configuration information；
Module (403), for receiving srs transmitting scheduling information；
Controller (404), for sending srs sequence；
Module (405), for adjusting power factor；
Wherein, described ue be additionally operable to obtain the cycle parameter of uplink channel resources that can be used for transmitting detection reference signal srs and
The position of sc-fdma symbol, if described cycle parameter is 2ms or is 5ms, described ue is additionally operable to the actual week to obtain
The srs signal that phase transmission previously generates.
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| CN105049165B (en) * | 2009-11-02 | 2019-09-10 | 诺基亚通信公司 | Method and apparatus for telecommunications |
| CN101827444B (en) * | 2010-03-31 | 2015-03-25 | 中兴通讯股份有限公司 | Signaling configuration system and method for measuring reference signal |
| US8917687B2 (en) | 2010-04-20 | 2014-12-23 | China Mobile Communications Corporation | Method, apparatus and system for sending and receiving sounding reference signal |
| EP2647237B1 (en) | 2010-06-15 | 2017-12-06 | Huawei Technologies Co., Ltd. | Method and apparatus of wireless communications |
| CN102625354B (en) * | 2010-07-13 | 2014-03-26 | 华为技术有限公司 | Method, terminal and base station for triggering terminal to transmit measurement reference signal |
| CN103210694B (en) * | 2010-11-16 | 2016-05-25 | 松下电器（美国）知识产权公司 | Communicator and detection reference signal sending control method |
| CN102036302B (en) | 2011-01-06 | 2014-01-01 | 华为技术有限公司 | Resource management method, base station and system |
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| CN102685707A (en) * | 2011-03-09 | 2012-09-19 | 华为技术有限公司 | Method and device for solving collision of non-periodic SRS (Sound Reference Signal) and uplink control signaling |
| CN102740479B (en) * | 2011-03-31 | 2016-03-16 | 上海贝尔股份有限公司 | For the method for sounding reference signal resource distribution in mobile communication system |
| JP5620888B2 (en) * | 2011-07-26 | 2014-11-05 | 京セラ株式会社 | Radio base station and communication control method |
| CN103096449B (en) * | 2011-11-04 | 2018-06-19 | 中兴通讯股份有限公司 | A kind of Poewr control method of detection reference signal, system and device |
| CN103843440A (en) | 2012-09-28 | 2014-06-04 | 华为技术有限公司 | Resource configuration method and apparatus |
| CN103974336B (en) * | 2013-01-25 | 2017-09-29 | 成都鼎桥通信技术有限公司 | Detection reference signal sending method and user equipment |
| US9455772B2 (en) * | 2013-06-28 | 2016-09-27 | Huawei Technologies Co., Ltd. | System and method for network uplink measurement based operation using UE centric sounding |
| EP3007501B1 (en) | 2013-08-20 | 2018-11-07 | Huawei Technologies Co., Ltd. | Training resource allocation method, apparatus and system |
| CN106559887B (en) * | 2015-09-29 | 2021-12-31 | 华为技术有限公司 | Method for configuring resources and network equipment |
| WO2017166234A1 (en) * | 2016-03-31 | 2017-10-05 | 华为技术有限公司 | Signal transmission method, signal transmission controlling method, user device, and base station |
| CN107294686A (en) | 2016-04-01 | 2017-10-24 | 中兴通讯股份有限公司 | Detection reference signal sending, receiving method, device, UE and base station |
| CN107371271B (en) | 2016-05-12 | 2022-05-24 | 北京三星通信技术研究有限公司 | Uplink signal sending method and user equipment |
| CN107370589B (en) * | 2016-05-13 | 2023-04-07 | 中兴通讯股份有限公司 | Signal transmission method and device and user equipment |
| EP3528565A4 (en) * | 2016-11-04 | 2019-10-30 | Huawei Technologies Co., Ltd. | Method for transmitting sounding reference signal, and network device and terminal device |
| KR20190103291A (en) | 2017-01-17 | 2019-09-04 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | Sounding reference signal transmission method, terminal equipment and network equipment |
| US10873869B2 (en) * | 2017-06-16 | 2020-12-22 | Qualcomm Incorporated | Cell-specific sounding and measurement configuration |
| CN109413739B (en) * | 2017-08-15 | 2020-10-27 | 大唐移动通信设备有限公司 | Resource allocation method and device in enhanced machine type communication (eMTC) |
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