CN108809566A - The transmission of imperfect subframe and demodulation method, corresponding user equipment and base station - Google Patents

The transmission of imperfect subframe and demodulation method, corresponding user equipment and base station Download PDF

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Publication number
CN108809566A
CN108809566A CN201710309300.1A CN201710309300A CN108809566A CN 108809566 A CN108809566 A CN 108809566A CN 201710309300 A CN201710309300 A CN 201710309300A CN 108809566 A CN108809566 A CN 108809566A
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China
Prior art keywords
subframe
imperfect
dmrs
layer
imperfect subframe
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Inventor
姜宇
刘柳
李安新
原田浩树
永田聪
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NTT Docomo Inc
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NTT Docomo Inc
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Priority to CN201710309300.1A priority Critical patent/CN108809566A/en
Priority to PCT/CN2018/077841 priority patent/WO2018201785A1/en
Publication of CN108809566A publication Critical patent/CN108809566A/en
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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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

It proposes and is transmitted under a kind of unlicensed spectrum and the method for the demodulation imperfect subframe of uplink, and corresponding user equipment and base station.Wherein, the method that the imperfect subframe of uplink is transmitted under unlicensed spectrum, including：At least one of in the quantity of orthogonal layers supported according to the quantity of the layer of the uplink scheduling information UL grant uplink specified and imperfect subframe, and the symbolic number of the imperfect subframe demodulated reference signal DMRS that includes, the transmission mode of DMRS is determined for the imperfect subframe；And identified DMRS transmission modes are utilized, transmit imperfect subframe., can be compatible with the UL grant phases of normal sub-frames by the UL grant of imperfect subframe according to the transmission method of the disclosure, and realize and transmit subframe in orthogonal layers as much as possible.

Description

The transmission of imperfect subframe and demodulation method, corresponding user equipment and base station
Technical field
This disclosure relates to wireless communication field, and in particular to one kind is transmitted in unlicensed spectrum and demodulates uplink not The method of complete subframe, and corresponding user equipment and base station.
Background technology
In traditional 3GPP (3rd Generation Partner Project, third generation cooperative partner program) system In, data transmission, which can only occur in, to be authorized on frequency spectrum, however as increased dramatically for portfolio, frequency spectrum is authorized to be likely difficult to meet The demand of portfolio.For this purpose, industry proposes the research integrated to unlicensed spectrum.
Transmitting PUSCH using unlicensed spectrum, (Physical Uplink Shared Channel, physical uplink are shared Channel) wireless signal when, DMRS (Demodulation Reference Signal, demodulated reference signal) plays important Role.DMRS is mainly used for eNodeB and carries out channel estimation to uplink physical channel correctly to demodulate PUSCH, and DMRS It is usually located on the 4th SC-FDMA symbol of inverse of each time slot (Slot).
Fig. 1 schematically shows the structure of a normal PUSCH subframe.As shown in Figure 1, two of a normal sub-frames DMRS is located at the 4th SC-FDMA symbol of first time slot and at the 4th SC-FDMA symbol of second time slot.
For PUSCH, in SU-MIMO (single user-multiple-input and multiple-output), same UE can be sent on the different layers Data, the different DMRS used on different layers need it is orthogonal, to avoid interlayer interference.Between the different DMRS of guarantee just The property handed over can utilize cyclic shift (cyclic shift) and include the orthogonal covering codes (Orthogonal of two code words Cover Code, OCC) configuration ensure the orthogonality between DMRS.For example, can be according in table 1And OCC The orthogonality being configured to provide between DMRS.For normal sub-frames as shown in Figure 1, since it has there are two DMRS, By using orthogonal covering codes and cyclic shift is combined, maximum four orthogonal layers can be configured for each UE to transmit PUSCH Sub-frame data.
Table 1
Other than normal PUSCH subframes, imperfect subframe is also supported in unlicensed spectrum transmission.It is schematic in Fig. 2 Ground shows imperfect starting subframe and the imperfect example for terminating subframe.In imperfect starting subframe and imperfect end subframe In, include only a DMRS OFDM symbol.More generally, it is less than or equal to the endless of 10 SC-FDMA symbolic numbers in length In whole subframe (partial subframe), and only there are one DMRS OFDM symbols for tool.And in order to support two codes simultaneously The orthogonal covering codes of word, subframe generally require two DMRS symbols.Therefore, for imperfect subframe, the current configuration sides DMRS Two code words of orthogonal covering codes can not be supported in formula simultaneously, to which cyclic shift can only be carried out to DMRS, result in maximum only Only support two orthogonal layers.
In addition, in more subframe schedulings in (Multiple subframe scheduling, MSF), MIMO layer is to being adjusted All subframes of degree are public.In consideration of it, there are two kinds of possible unlicensed spectrum UL scheduling modes：A kind of mode It is to use the individual uplink grant information (UL grant), another way to be for imperfect subframe and normal sub-frames, If UL grant dispatch at least one imperfect subframe, the maximum MIMO layer number of permitted all subframes is limited System.However, there is at least following defect in above-mentioned scheduling mode.For example, first way needs for imperfect subframe and normal-sub Different UL grant information is respectively configured in frame, increase descending control signaling (Downlink Control Information, DCI expense)；And the second way then limits the number of plies for being used for transmission subframe, reduces the efficiency of transmission of UL.
Invention content
The imperfect son of uplink is transmitted and demodulated in unlicensed spectrum in view of the above problems, the present disclosure proposes one kind The method of frame, and corresponding user equipment and base station, so as to by the UL grant of imperfect subframe and normal sub-frames UL grant phases are compatible with, and are realized and transmitted subframe in orthogonal layers as much as possible.
According to the one side of the disclosure, it is proposed that a kind of side for transmitting the imperfect subframe of uplink in unlicensed spectrum Method, including：The quantity and imperfect subframe of the layer for the uplink specified according to uplink scheduling information are supported orthogonal In the quantity of layer at least one of and the imperfect subframe DMRS symbolic numbers that include, determine demodulation ginseng for the imperfect subframe Examine the transmission mode of signal DMRS；And identified DMRS transmission modes are utilized, transmit imperfect subframe.
According to another aspect of the present disclosure, it is proposed that a kind of to demodulate the imperfect subframe of uplink in unlicensed spectrum Method, including：According to the layer of the quantity of the layer of the specified uplink of uplink scheduling information and the imperfect subframe of reception In quantity at least one of and the imperfect subframe demodulated reference signal DMRS symbolic numbers that include, determined for the imperfect subframe The configuration mode of DMRS；DMRS is extracted based on the configuration mode of identified DMRS, and using the DMRS of extraction to endless Whole subframe is demodulated.
According to the another aspect of the disclosure, it is proposed that a kind of user equipment, including be configured as executing and above-mentioned be awarded non- Weigh the processor of the method for the transmission imperfect subframe of uplink on frequency spectrum.
According to another aspect of the present disclosure, it is proposed that a kind of base station, including be configured as executing above-mentioned in unauthorized frequency The processor of the method for the imperfect subframe of uplink is demodulated in spectrum.
Description of the drawings
In order to illustrate more clearly of the technical solution of the embodiment of the present disclosure, will simply be situated between to the attached drawing of embodiment below It continues, it should be apparent that, the accompanying drawings in the following description merely relates to some embodiments of the present disclosure, rather than the limitation to the disclosure.
Fig. 1 schematically shows the structure of a normal PUSCH subframe.
Fig. 2 schematically shows terminate not in the imperfect starting subframe started with boundary of time slot and with boundary of time slot Completely terminate subframe.
One kind that Fig. 3 schematically shows disclosure proposition transmits the imperfect subframe of uplink in unlicensed spectrum Method flow chart.
Fig. 4 A-4B schematically 1 principles in accordance with an embodiment of the present disclosure.
Fig. 5 schematically 2 principles in accordance with an embodiment of the present disclosure.
Fig. 6 schematically 3 principles in accordance with an embodiment of the present disclosure.
Fig. 7 A-7B schematically 4 principles in accordance with an embodiment of the present disclosure.
Fig. 8 A-8B schematically show the principle of embodiment of the disclosure 5.
One kind that Fig. 9 schematically shows disclosure proposition demodulates the imperfect subframe of uplink in unlicensed spectrum Method.
Figure 10 is the example for the hardware configuration for schematically showing base station and user terminal involved by the disclosure.
Specific implementation mode
The technical solution in the embodiment of the present disclosure is clearly and completely described below in conjunction with attached drawing.Obviously, it is retouched The embodiment stated is only disclosure a part of the embodiment, instead of all the embodiments.Based on the embodiment in the disclosure, originally All other embodiment that field those of ordinary skill is obtained without making creative work, also belongs to the disclosure The range of protection.
According to the first aspect of the disclosure, it is proposed that a kind of to transmit the imperfect subframe of uplink in unlicensed spectrum Method.As shown in figure 3, this method includes：In step S300, according to the layer of the specified uplink of uplink scheduling information In the quantity for the orthogonal layers that quantity and imperfect subframe are supported at least one of and the imperfect subframe DMRS symbols that include Number, the transmission mode of demodulated reference signal DMRS is determined for the imperfect subframe；And in step S310, using identified DMRS transmission modes transmit imperfect subframe.
According to the method that the first aspect of the disclosure proposes, can be specified based on uplink scheduling information UL grant The quantity for the orthogonal transmission layer that the number of plies of uplink and imperfect subframe to be scheduled are supported, and consider imperfect son The DMRS symbolic numbers that frame includes neatly determine the transmission mode of DMRS for imperfect subframe；It can not only improve for not The compatibility of the uplink scheduling of complete sub-frame transmission and the uplink scheduling for normal sub-frames transmission, but also can use and to the greatest extent may be used Orthogonal layers more than energy transmit imperfect subframe, improve the efficiency of imperfect sub-frame transmission.
This method is described in detail below with reference to specific embodiment.
<Embodiment 1>
In embodiment of the disclosure 1, for imperfect subframe only include a DMRS OFDM symbol OS the case where, carry The strategy of rollback (fall back) transmission is gone out, so that dispatching and the scheduling energy to normal sub-frames to imperfect subframe It is enough compatible, it avoids respectively specifying that individual UL grant information for imperfect subframe and normal sub-frames.
Specifically, in the embodiment 1, the rollback may include being returned to the number of plies for being used for transmission imperfect subframe The mode (hereinafter referred to as the number of plies retracts, the first example) moved back, can also include to the DMRS sequences for imperfect subframe The mode to retract (hereinafter referred to as sequence retracts, the second example).
The case where first exemplary number of plies that Fig. 4 A schematically show the embodiment 1 retracts.By this strategy, such as Example shown in Fig. 4 A, the number of plies that UE indicates the layer for transmitting imperfect subframe from base station in UL grant information, such as four Layer, return back to orthogonal two layers that imperfect subframe is supported.
As described above, only having there are one when DMRS symbols in imperfect subframe, permitted maximum orthogonality layer is two layers, because This, when UE judges that base station indicates that UE transmits the number of plies of subframe as more than imperfect subframe institute by uplink scheduling information UL grant When the quantity of the orthogonal layers of support, and when the imperfect subframe only includes a DMRS symbol, UE can carry out the number of plies and return It moves back, that is, the number of plies that the number of plies for being used for transmission imperfect subframe is indicated from UL grant is return back to the permitted orthogonal number of plies. Specifically, UE judges whether the quantity for the orthogonal layers that imperfect subframe is supported is used for less than what uplink scheduling information was specified The quantity of the layer of transmission；It is less than the layer being used for transmission that uplink scheduling information is specified in the quantity for the orthogonal layers that it is supported Quantity when, and the imperfect subframe only include a DMRS symbol, the imperfect subframe is with its orthogonal layers supported Quantity is transmitted.For example, the corresponding code in above table 1 can be applied for the DMRS of each transport layer of imperfect subframe Word, wherein can will be preset as 1 for the code word of the orthogonal covering codes of imperfect subframe, or uplink tune can be applied Spend the specified orthogonal covering codes of information.
In the case, for cyclic shift, need to ensure that the cyclic shift value difference of different interlayers is the bigger the better, To minimize interlayer (inter-layer) interference.By enquiry form 1 it is found that UE can select the cyclic shift value phase of interlayer The layer #0 and layer #1 that difference is 6.As set forth above, it is possible to utilize the corresponding codewords in above table 1；Wherein it is possible to by imperfect son The orthogonal covering codes OCC of frame is configured to [11], that is, w(λ)(0)=w(λ)(1)=1, this situation table 2 for example below is shown；Or Person can apply the orthogonal covering codes specified in uplink scheduling UL grant information.
Table 2
According to the example, due to transmitting DMRS on two orthogonal layers, it is ensured that the accuracy of channel estimation.
The case where the second exemplary sequence that Fig. 4 B schematically show embodiment 1 retracts.It, will in second example The quantity of the specified layer being used for transmission of uplink scheduling information is determined as transmitting the quantity of the layer of the imperfect subframe, endless Whole subframe only generates DMRS using the cyclic shift that uplink scheduling information is specified on each layer without orthogonal covering codes Symbol.That is, for example as shown in below table 3, it is used for transmission without the use of OCC to realize just with cyclic shift CS Orthogonality between the layer of imperfect subframe.For example, orthogonal covering codes can not had to, or just by the imperfect subframe of each layer Overlay code OCC is handed over to be each configured to identical value.
Table 3
In this embodiment, do not use OCC, and cyclic shift CS follow it is related to uplink in UL grant information DCI format [3] in cyclic shift field (Cyclic shift for DMRS and OCC index) field in finger Show.
According to second example, MIMO layer number identical with normal sub-frames may be implemented.
To sum up, according to embodiment 1, the compatibility of imperfect subframe and the UL scheduling mechanisms of complete subframe may be implemented, and And it is smaller to the change of the existing transmission mechanism for normal sub-frames, simply and it is easily achieved.
<Embodiment 2>
In embodiment of the disclosure 2, for imperfect subframe only include a DMRS OS the case where, it is proposed that it is another Kind is the strategy that imperfect subframe determines DMRS transmission modes.Fig. 5 schematically shows the principle of embodiment of the disclosure 2.
Specifically, in example 2, the quantity for the layer being used for transmission that uplink scheduling information is specified is determined as The quantity of the layer of the imperfect subframe is transmitted, wherein the imperfect subframe only includes a DMRS symbol, and by more subframe tune Degree mechanism is dispatched together with other subframes；Wherein, on each layer, the DMRS symbols included by the imperfect subframe and adjacent son DMRS symbols included by the adjacent time-slots of frame are used to demodulate the imperfect subframe together.Here, the adjacent sub-frame can be Adjacent complete subframe or adjacent imperfect subframe, as long as it has in the adjacent time-slots of the imperfect subframe to be dispatched One DMRS symbol.
That is, in example 2, when determining the transmission mode of DMRS of imperfect subframe, the phase of adjacent sub-frame The DMRS symbols that adjacent time slot includes are borrowed, and are combined with a DMRS symbol included by imperfect subframe, form two A DMRS symbols, it is endless so as to ensure to be used for transmission using the cyclic shift and orthogonal covering codes similar with normal sub-frames Orthogonality between each layer of whole subframe.
Optionally, for the imperfect starting subframe to be dispatched, the DMRS that can included to the imperfect starting subframe Symbol and first DMRS symbol of the latter subframe adjacent thereto apply a code word of orthogonal covering codes respectively, for example, W is applied respectively(λ)(1) and w(λ)(0)。
Optionally, for the imperfect end subframe to be dispatched, imperfect adjacent previous of subframe can be terminated to this The DMRS symbols that second DMRS symbol of subframe and the imperfect end subframe are included apply the one of orthogonal covering codes respectively A numeral, for example, applying w respectively(λ)(1) and w(λ)(0)。
In this embodiment, it is contemplated that it needs to borrow one DMRS symbol of adjacent time-slots of adjacent sub-frame, it is therefore, usually sharp The imperfect subframe dispatched will be needed to be dispatched together with adjacent sub-frame with more subframe scheduling mechanism.
It is alternatively possible to according to Cyclic shift for DMRS and OCC index fields in UL grant information In instruction come be arranged correspond to the imperfect starting subframe to be dispatched orthogonal covering codes in code word w(λ)(0) and it is arranged Corresponding to the code word w in the imperfect orthogonal covering codes for terminating subframe(λ)(1)。
According to embodiment 2, the DMRS of the adjacent time-slots by borrowing adjacent sub-frame, and itself include with imperfect subframe A DMRS symbol be combined, imperfect subframe may be implemented and be transmitted with identical with normal sub-frames orthogonal layers.
According to the present embodiment, since DMRS can be transmitted in most four orthogonal layers, it is ensured that the standard of channel estimation True property.
<Embodiment 3>
In embodiment of the disclosure 3, it is proposed that using two DMRS of adjacent normal sub-frames come for imperfect subframe Determine the strategy of DMRS transmission modes.Fig. 6 schematically shows the principle of embodiment of the disclosure 3.
Specifically, in embodiment 3, the number of plies being used for transmission that uplink scheduling information is specified is determined as to institute The number of plies that the imperfect subframe of scheduling is transmitted, and it does not include DMRS symbols to be by imperfect sub-frame configuration.Due to needing Two DMRS symbols of an adjacent normal sub-frames are borrowed, therefore, usually scheduled imperfect subframe is needed by more subframes Scheduling mechanism is dispatched together with adjacent normal sub-frames.That is, in embodiment 3, when transmitting imperfect subframe, being adjusted The imperfect subframe itself of degree can not have to configuration DMRS symbols, but borrow two DMRS that adjacent normal sub-frames are included Symbol, to determine the transmission mode of the DMRS for scheduled imperfect subframe.Due to having borrowed two of normal sub-frames DMRS symbols, it is imperfect so as to ensure to be used for transmission using the cyclic shift and orthogonal covering codes similar with normal sub-frames Orthogonality between each layer of subframe.
Optionally, for the imperfect starting subframe to be dispatched, the latter normal sub-frames adjacent thereto can be utilized Two DMRS symbols, and the cyclic shift similar with normal sub-frames and orthogonal covering codes may be used to ensure to be used for transmission not Orthogonality between each layer of complete subframe.
Optionally, for the imperfect end subframe to be dispatched, previous normal sub-frames adjacent thereto can be utilized Two DMRS symbols, and the cyclic shift similar with normal sub-frames and orthogonal covering codes may be used to ensure to be used for transmission not Orthogonality between each layer of complete subframe.
It is alternatively possible to which imperfect sub-frame configuration itself is not included by the signaling for passing through RRC or DCI etc in transmission DMRS symbols.For example, a threshold value can be indicated by RCC (Radio Resource Control) signalings, when imperfect son When the symbolic number of frame is less than a threshold value of control signaling instruction, it does not include DMRS symbols to be by the imperfect sub-frame configuration.
Optionally, imperfect starting subframe and imperfect end subframe are respectively configured as not by respective individually DCI Including DMRS symbols；Alternatively, can by common DCI control signalings by imperfect starting subframe and imperfect end subframe together It is configured to not include DMRS symbols.
In embodiment 3, it is contemplated that need to borrow two DMRS symbols of adjacent normal sub-frames, therefore, usually utilize More subframe scheduling mechanism will need the imperfect subframe dispatched to be dispatched together with adjacent normal sub-frames.
According to embodiment 3, by borrowing two DMRS symbols of adjacent normal sub-frames, without being used in imperfect subframe Including DMRS, to reduce the transport overhead of DMRS, while can realize orthogonal layers identical with normal sub-frames in transmission.
<Embodiment 4>
In embodiment of the disclosure 4, for imperfect subframe only include a DMRS OS the case where, it is proposed that it is another Kind is the strategy that imperfect subframe determines DMRS transmission modes.Fig. 7 A-7B schematically show the original of embodiment of the disclosure 4 Reason.
In example 4, it is that original only imperfect subframe comprising a DMRS OS adds another DMRS symbol, So that imperfect subframe is identical as the maximum orthogonality number of plies that normal sub-frames are supported.
Specifically, in example 4, the quantity for the layer being used for transmission that uplink scheduling information is specified is determined as The quantity for transmitting the layer of the imperfect subframe originally only included a DMRS of a position and normal sub-frames in imperfect subframe When the identical DMRS symbols in the position of symbol, another DMRS symbol is added to imperfect subframe；Wherein, added another DMRS symbols are used to demodulate the imperfect subframe together with the DMRS symbols for including originally, another DMRS symbol added Position is different from the positions DMRS of normal sub-frames, and the position of the DMRS symbols added can be used for determining opening for imperfect subframe Beginning or end position.
In fact, in accordance with an embodiment of the present disclosure 4, a kind of new UL subframe format that has been imperfect subframe definition.It is optional Ground, by base station by control signaling notify to UE use this new sub-frame formats configuration.
As described above, two DMRS symbols of normal sub-frames are located at the 4th SC-FDMA of two time slots of subframe At symbol.In new UL subframe format, the position of the position of DMRS symbols and the DMRS symbols of normal sub-frames is not exactly the same, This is illustrated below.
It, can be quick after the transmission for terminating the imperfect subframes of downlink DL under unlicensed spectrum transmission mode The transmission imperfect starting subframes of UL are switched to, obtain the possibility of channel to increase UL, and improve in unlicensed spectrum Efficiency of transmission.
For example, the symbolic number that the imperfect subframe of corresponding DL occupies at the end of the imperfect sub-frame transmissions of DL may be 3,6, 9,10,11,12 }, it is contemplated that a normal sub-frames occupy 14 symbolic numbers, and thus the imperfect starting subframes of corresponding UL occupy Symbolic number is { 11,8,5,4,3,2 }.Below simply with { 11,8,5 } as the imperfect starting subframe institutes of the UL in the present embodiment The symbolic number of occupancy illustrates.
Fig. 7 A show the position that DMRS symbols can be configured in this new UL subframe format.For example, in DL subframe At the end of transmission is with symbol #2, the starting position of UL subframe transmission is symbol #3 immediately, and therefore, the imperfect starting subframes of UL account for Maximum symbolic number can be 11；In view of UL first symbol of imperfect starting subframe, such as symbol #3, a certain section of starting Time is likely to be used for channel-monitoring (LBT), and adding another DMRS symbol to imperfect subframe is located at the position of symbol #4. The position of another DMRS symbol added as a result, is located at the 2nd character position of imperfect starting subframe.Similarly, in DL At the end of sub-frame transmission is with symbol #5, the starting position of UL subframe transmission is symbol #6 immediately, and imperfect starting subframe occupies Maximum symbolic number can be 8；Consider UL LBT, the position that another DMRS symbol is located at symbol #7 is added to imperfect subframe Place；At this point, 2nd character position of the position of another DMRS symbol added also in imperfect starting subframe.Thus As it can be seen that the position of another DMRS symbol added to imperfect starting subframe can serve to indicate that imperfect starting subframe Starting position.At the end of DL subframe is transmitted with symbol #8, identical original may be used in the case where adding another DMRS symbol Reason, referring specifically to the diagram of Fig. 7 A.
Correspondingly, the case where adding another DMRS symbols to the imperfect end subframe originally only comprising a DMRS symbol It is similar therewith.First, the imperfect symbol for terminating the symbolic number that subframe occupies and needing to consider that imperfect starting subframe occupies accordingly Number and Maximum Burst Size (the Burst Length) in unlicensed band.For example, the imperfect starting subframes of corresponding UL The symbolic number of occupancy may be { 11,8,5,4,3,2 }, and Maximum Burst Size is 4ms, then UL is imperfect terminates what subframe occupied Symbolic number may be { 3,6,9,10,11,12 }.Below simply with { 6,9,11 } as the imperfect end of UL in the present embodiment Subframe occupied symbolic number illustrates.
Fig. 7 B show the position that DMRS symbols can be configured in this new UL subframe format.For example, endless in UL It is whole terminate subframe occupy symbolic number be the imperfect end sub-frame transmissions of 6, UL with symbol #5 at the end of, to imperfect end subframe Another DMRS symbol is added to be located at the position of symbol #2 or 3.Similarly, in the imperfect symbolic numbers for terminating subframe and occupying of UL It is 9, at the end of UL subframe is transmitted with symbol #8, the position that another DMRS symbol is located at symbol #7 is added to imperfect subframe Place；It can be seen that the position of another DMRS symbol added to imperfect end subframe can serve to indicate that imperfect knot The end position of beam subframe.It is 11 in the imperfect symbolic numbers for terminating subframe occupancy of UL, UL subframe transmission is terminated with symbol #10, That adds another DMRS symbol can be located at symbol #9, referring specifically to the diagram of Fig. 7 B.
In the present embodiment, due to being added to another DMRS symbols to the imperfect subframe only comprising a DMRS symbol Number, so as to ensure that DMRS is transmitting imperfect subframe using the cyclic shift and orthogonal covering codes similar with normal sub-frames Each layer between orthogonality.
According to this embodiment, it can realize the detection to beginning/end position of imperfect subframe, and realize with it is normal The orthogonal layers of the identical quantity of subframe.
<Embodiment 5>
In embodiment of the disclosure 5, for imperfect subframe only include a DMRS OS the case where, it is proposed that it is another Kind is the strategy that imperfect subframe determines DMRS transmission modes.Fig. 8 A-8B schematically show the original of embodiment of the disclosure 5 Reason.
The case where only including a DMRS OS for imperfect subframe, in the present embodiment, it is proposed that using being based on The pectinate texture of IFDMA come determine DMRS transmission strategy.In other words, in the present embodiment, it is proposed that son can be utilized to carry The orthogonality of wave, for the orthogonal layers for the imperfect subframe realization quantity identical as normal sub-frames for only including a DMRS symbol.
Specifically, embodiment 5 can be subdivided into embodiment 5A and embodiment 5B again.Embodiment 5A is first directed to below to carry out in detail Thin description.
Embodiment 5A is directed to the imperfect subframe for only including a DMRS symbol, it is proposed that refers to uplink scheduling information The quantity of the fixed layer being used for transmission is determined as transmitting the quantity of the layer of the imperfect subframe, by the DMRS symbols of imperfect subframe Subcarrier be divided into two groups；DMRS into two groups of subcarriers applies identical cyclic shift on the same layer, and will be orthogonal Overlay code is applied in the DMRS in two groups of subcarriers.
Fig. 8 A schematically show the principle of embodiment 5A.As shown in Figure 8 A, by the DMRS symbols of imperfect subframe Subcarrier is divided into two groups of comb#0 and comb#1, then, is followed using identical on same layer in two groups of comb#0 and comb#1 Ring shifts, and two code words of orthogonal covering codes are separately to the DMRS in two groups of subcarriers.For example, comb#0 is applied w(λ)(0), comb#1 applications w(λ)(1)。
In this way, the Cyclic shift for DMRS that the UL grant shown in table 1 are indicated can be reused The field of and OCC index, without being changed.With being differing principally in that for the conventional mode using OCC2, covered orthogonal Two code words of lid code are to be separately to two groups of sons to carry by two DMRS sign modifications for being originally separately to normal sub-frames On the DMRS symbols of wave.
Embodiment 5B is directed to the imperfect subframe for only including a DMRS symbol, it is proposed that refers to uplink scheduling information The quantity of the fixed layer being used for transmission is determined as transmitting the quantity of the layer of the imperfect subframe, only includes one in imperfect subframe When DMRS symbols, the subcarrier of the DMRS symbols of imperfect subframe is divided into two groups, wherein first group of DMRS subcarrier is for solving Adjust a part of layer, second group of DMRS subcarrier for demodulating another part layer, and to the corresponding each layer of each subcarrier group it Between, only cyclic shift is applied to realize the orthogonal of interlayer.
Fig. 8 B schematically show the principle of embodiment 5B.As shown in Figure 8 B, by the DMRS symbols of imperfect subframe Subcarrier is divided into two groups of comb#0 and comb#1, and comb#0DMRS subcarriers are for demodulating such as layer #0 and layer #1, comb# For demodulating such as layer #2 and layer #3, and between the corresponding each layer of each subcarrier group, only application recycles 1DMRS subcarriers The orthogonal of interlayer is realized in displacement.
Optionally, in embodiment 5B, it is contemplated that the pectinate texture of DMRS symbols, the table 4 that can be defined as follows.In table In 4, for example, the situation indicated by cyclic shift field " 000 ", the subcarrier of the DMRS symbols of imperfect subframe is divided into Comb#0 and two groups of comb#1, subcarrier group comb#0 are for demodulating such as layer #0 and layer #1, and subcarrier group comb#1 is for solving Such as layer #2 and layer #3 are adjusted, and (for example, subcarrier group comb#0 is corresponding between the corresponding each layer of each subcarrier group Between layer #0 and layer #1 or between subcarrier group comb#1 corresponding layer #2 and layer #3), only cyclic shift is applied to realize interlayer It is orthogonal.
Table 4
In the present embodiment, due to being grouped to DMRS symbol subcarriers, using the orthogonality of subcarrier, can also make Obtain only includes that the imperfect subframe of a DMRS symbol realizes the orthogonal layers of quantity identical as normal sub-frames.
<Embodiment 6>
In embodiment of the disclosure 6, it is also proposed that can be to imperfect subframe switching at runtime institute in the above-described embodiments The transmission configuration mode of the various DMRS of description.
For example, UE can receive control signaling according to from base station, for example, RRC or DCI etc., to determine using which Kind DMRS configuration modes, to transmit imperfect subframe.
Optionally, UE can send the configuration side for the DMRS for imperfect subframe that the UE can be supported to base station Formula so that base station can be scheduled imperfect subframe according to the configuration mode that UE is supported.
<Embodiment 7>
In embodiment of the disclosure 7, it is proposed that uplink scheduling information UL grant can be configured to specify The quantity of the layer of the uplink of scheduled normal sub-frames and imperfect subframe, to improve flexibility and compatibility.
Optionally, the quantity of the layer of the uplink of scheduled imperfect subframe is specified in uplink scheduling information When, the quantity of specified imperfect starting subframe and the imperfect layer for terminating the respective uplink of subframe can be configured to.
Optionally, the quantity of the layer of the uplink of scheduled imperfect subframe is specified in uplink scheduling information When, it can be configured to designate imperfect starting subframe and the imperfect quantity for terminating subframe using the layer of identical uplink.
It is the transmission side that imperfect subframe determines demodulated reference signal DMRS above in relation to the UE in the sending side of UL subframe Formula is described in detail, and the DMRS for imperfect subframe how will be extracted for the base station eNodeB of receiving side below, from And it demodulates imperfect subframe and illustrates.
According to the second aspect of the disclosure, it is proposed that a kind of to demodulate the imperfect subframe of uplink in unlicensed spectrum Method.As shown in figure 9, this method includes：In step S900, according to the layer of the specified uplink of uplink scheduling information Quantity and receive imperfect subframe layer quantity at least one of and the imperfect subframe demodulated reference signal that includes DMRS symbolic numbers determine the configuration mode of DMRS for the imperfect subframe；In step S910, based on the configuration of identified DMRS Mode demodulates imperfect subframe using the DMRS of extraction to extract DMRS.
Since the DMRS that the base station eNodeB extraction of the receiving side in UL subframe is used for imperfect subframe is endless to demodulate The mode of whole subframe is that the transmission mode of demodulated reference signal DMRS that imperfect subframe determines is related to the UE in sending side, because This is briefly described each embodiment for demodulating imperfect subframe with reference to embodiments, concrete principle may refer to above with respect to Transmit each embodiment described in imperfect subframe.
<Embodiment 8>
Embodiment of the disclosure 8 proposes a kind of method demodulating the imperfect subframe of uplink in unlicensed spectrum. This method includes：Judge whether the quantity for receiving the layer of imperfect subframe is used for transmission less than what uplink scheduling information was specified Layer quantity；It is less than the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe Quantity, and the imperfect subframe only include a DMRS symbol when, utilize the DMRS symbols carry out channel estimation.Specifically, When using the DMRS symbols and generating the DMRS symbols using orthogonal covering codes carry out channel estimation.For example, it is described just It can be corresponding codewords in above table 1 to hand over overlay code, can be either preset value (such as 1) or can be uplink The specified value of road scheduling information.
The embodiment is applicable in the case of the sides UE retract to the layer for transmitting imperfect subframe to receiving Imperfect subframe demodulated.The embodiment 8 corresponds to the first example in above-described embodiment 1.
<Embodiment 9>
Embodiment of the disclosure 9 proposes a kind of method demodulating the imperfect subframe of uplink in unlicensed spectrum. This method includes：It is equal to the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe When quantity, and the imperfect subframe only include a DMRS symbol when, utilize the DMRS symbols carry out channel estimation.Specifically Ground, when using the DMRS symbols and generating the DMRS symbols using cyclic shift value carry out channel estimation.For example, in life The orthogonal covering codes OCC of the imperfect subframe of each layer can be each configured to identical value at when DMRS symbols.
The embodiment is applicable to the situation to be retracted in DMRS sequence of the sides UE to imperfect subframe to receiving To imperfect subframe demodulated.The embodiment 9 corresponds to the second example in above-described embodiment 1.
<Embodiment 10>
Embodiment of the disclosure 10 proposes a kind of method demodulating the imperfect subframe of uplink in unlicensed spectrum. This method includes：It is equal to the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe Quantity, and the imperfect subframe only include a DMRS symbol when, on each layer, included by the imperfect subframe Two DMRSs of the DMRS symbols as the imperfect subframe included by the adjacent time-slots of DMRS symbols and adjacent sub-frame.
In this embodiment, it is wrapped using the symbol of the DMRS included by imperfect subframe and the adjacent time-slots of adjacent sub-frame The DMRS symbols included are used as the DMRS for imperfect subframe, to be demodulated to the imperfect subframe of reception.Specifically, For the imperfect starting subframe to be received, DMRS symbols that the imperfect starting subframe can be utilized to be included and it is adjacent after First DMRS symbol of one subframe is used as two DMRS for imperfect subframe, for demodulating the imperfect subframe； For the imperfect end subframe to be received, imperfect terminate the adjacent previous subframe of subframe second can be utilized The DMRS symbols that DMRS symbols and the imperfect end subframe are included are used as two DMRS for imperfect subframe, are used for Demodulate the imperfect subframe.
Here, the adjacent sub-frame can be adjacent complete subframe or adjacent imperfect subframe, if its with want There are one DMRS symbols for tool in the adjacent time-slots of the imperfect subframe of scheduling.The embodiment 10 corresponds to above-described embodiment 2.
<Embodiment 11>
Embodiment of the disclosure 11 proposes a kind of method demodulating the imperfect subframe of uplink in unlicensed spectrum. This method includes：It is equal to the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe Quantity, and the imperfect subframe be configured as not include DMRS symbols when, on each layer, using with the imperfect subframe The DMRS symbols of adjacent normal sub-frames are used as the DMRS for the imperfect subframe.
In this embodiment, it is used as imperfect using the symbol of two DMRS included by adjacent normal sub-frames The DMRS of subframe, to be demodulated to the imperfect subframe of reception.
Optionally, this method includes：The imperfect sub-frame configuration is not wrap by the threshold value indicated by control signaling Include DMRS symbols；Or imperfect starting subframe and imperfect end subframe are respectively configured as by respective individually control signaling Do not include DMRS symbols；Or it is configured imperfect starting subframe and imperfect end subframe to together by common control signaling Do not include DMRS symbols.The embodiment 11 corresponds to above-described embodiment 3.
<Embodiment 12>
Embodiment of the disclosure 12 proposes a kind of method demodulating the imperfect subframe of uplink in unlicensed spectrum. This method includes：It is equal to the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe Quantity, and imperfect subframe includes two DMRS symbols, is demodulated to imperfect subframe using two DMRS symbols, In the position position of DMRS symbols corresponding with normal sub-frames of a DMRS symbol it is identical, the position of another DMRS symbol with The positions of the corresponding DMRS symbols of normal sub-frames is different, and its position can by the beginning or end position of imperfect subframe Lai It determines.
According to this embodiment, it can realize the detection to beginning/end position of imperfect subframe.The embodiment 12 corresponds to In above-described embodiment 4.
<Embodiment 13>
Embodiment of the disclosure 13 proposes a kind of method demodulating the imperfect subframe of uplink in unlicensed spectrum. This method includes：It is equal to the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe The subcarrier of the DMRS symbols of imperfect subframe is divided into two groups by quantity when imperfect subframe only includes a DMRS symbol； For each transport layer, 2 DMRS symbols are provided using this two groups of subcarriers, for demodulating the imperfect subframe.The embodiment 13 correspond to above-described embodiment 5A.
<Embodiment 14>
Embodiment of the disclosure 14 proposes a kind of method demodulating the imperfect subframe of uplink in unlicensed spectrum. This method includes：It is equal to the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe Quantity, and imperfect subframe only include a DMRS symbol when, the subcarrier of the DMRS symbols of imperfect subframe is divided into two groups, Wherein, first group of DMRS subcarrier is used to demodulate the imperfect subframe of a part of layer, and second group of DMRS subcarrier is another for demodulating The imperfect subframe of a part of layer.The embodiment 14 corresponds to above-described embodiment 5B.
<Embodiment 15>
Embodiment of the disclosure 15, which is proposed, to be indicated by sending control signaling to imperfect subframe switching at runtime DMRS Configuration mode method.
Optionally, the above method further includes：Before sending control instruction, reception is used to indicate for imperfect subframe institute The information of the configuration mode of the DMRS of support.
<Embodiment 16>
Embodiment of the disclosure 16 proposes a kind of imperfect subframe and normal of being indicated by uplink scheduling information The method of the quantity for the layer that the transmission of subframe uses.Optionally, this method includes：Uplink scheduling information is configured to divide The quantity of the layer of the uplink of normal sub-frames and imperfect subframe that Zhi Ding be not scheduled；Wherein, believe in uplink scheduling When breath specifies the quantity of the layer of the uplink of scheduled imperfect subframe, specified imperfect starting can be configured to The quantity of frame and the imperfect layer for terminating the respective uplink of subframe；Or it is configured to designate imperfect starting subframe and not It is complete to terminate quantity of the subframe using the layer of identical uplink.
According to the third aspect of the disclosure, it is proposed that a kind of user equipment, include at least processor, the processor by with It is set to and executes the above-mentioned method for transmitting the imperfect subframe of uplink in unlicensed spectrum
According to the fourth aspect of the disclosure, it is proposed that a kind of user equipment, include at least processor, the processor by with It is set to and executes the above-mentioned method for demodulating the imperfect subframe of uplink in unlicensed spectrum.
For example, wireless base station, the user terminal etc. in an embodiment of the disclosure can be as the nothings for executing the disclosure The computer of the processing of line communication means functions.Figure 10 show wireless base station involved by embodiment of the present disclosure and The example of the hardware configuration of user terminal.It includes processing that above-mentioned wireless base station 10 and user terminal 20, which can be used as physically, Device 1001, memory 1002, memory 1003, communication device 1004, input unit 1005, output device 1006, bus 1007 etc. Computer installation constitute.
In addition, in the following description, word as " device " also can be replaced circuit, equipment, unit etc..Wireless base Stand 10 and the hardware configuration of user terminal 20 may include one or more each device shown in figure, can not also include part Device.
For example, processor 1001 only illustrates one, but may be multiple processors.Furthermore, it is possible to by one Device is managed to execute processing, processing can also be executed simultaneously, successively or using other methods by more than one processor. In addition, processor 1001 can be installed by more than one chip.
Each function in wireless base station 10 and user terminal 20 is for example realized in the following way：By by defined software (program) is read on the hardware such as processor 1001, memory 1002, to make processor 1001 carry out operation, to by communication device 1004 communications carried out are controlled, and are controlled to the reading and/or write-in of the data in memory 1002 and memory 1003 System.
Processor 1001 for example makes operating system carry out work to integrally control computer.Processor 1001 can With by including central processing unit (CPU, the Central with the interface of peripheral device, control device, arithmetic unit, register etc. Processing Unit) it constitutes.
In addition, processor 1001 from memory 1003 and/or communicates program (program code), software module, data etc. Device 1004 reads into memory 1002, and executes various processing according to them.As program, may be used makes computer execute At least part of program in the action illustrated in the above embodiment.For example, the control unit 401 of user terminal 20 can be with It is realized by the control program for being stored in memory 1002 and being worked by processor 1001, for other functional blocks, It can similarly realize.
Memory 1002 is computer-readable recording medium, such as can be by read-only memory (ROM, Read Only Memory), programmable read only memory (EPROM, Erasable Programmable ROM), electrically programmable read-only memory It is (EEPROM, Electrically EPROM), random access memory (RAM, Random Access Memory), other appropriate At least one of storage medium constitute.Memory 1002 is referred to as register, cache, main memory (main memory Storage device) etc..Memory 1002 can be preserved can for implement the wireless communications method involved by an embodiment of the disclosure Execute program (program code), software module etc..
Memory 1003 is computer-readable recording medium, such as can be by floppy disc (flexible disk), floppy disk (floppy disk), magneto-optic disk (for example, CD-ROM (CD-ROM (Compact Disc ROM) etc.), digital versatile disc, Blue light (Blu-ray, registered trademark) CD), moveable magnetic disc, hard disk drive, smart card, flash memory device (for example, card, stick (stick), cipher key drivers (key driver)), magnetic stripe, database, server, in other storage mediums appropriate at least One is constituted.Memory 1003 is referred to as auxilary unit.
Communication device 1004 is that the hardware of the communication for carrying out intercomputer by wired and or wireless network (is sent Receiving device), such as the also referred to as network equipment, network controller, network interface card, communication module etc..Communication device 1004 is in order to realize Such as frequency division duplex (FDD, Frequency Division Duplex) and/or time division duplex (TDD, Time Division Duplex), it may include HF switch, duplexer, filter, frequency synthesizer etc..
Input unit 1005 is to receive the input equipment from external input (for example, keyboard, mouse, microphone, opening Pass, button, sensor etc.).Output device 1006 is to implement the output equipment to external output (for example, display, raising one's voice Device, light emitting diode (LED, Light Emitting Diode) lamp etc.).In addition, input unit 1005 and output device 1006 Or the structure (such as touch panel) of one.
In addition, each device such as processor 1001, memory 1002 is connected by the bus 1007 for being communicated to information. Bus 1007 can be made of single bus, can also be made of bus different between device.
In addition, wireless base station 10 and user terminal 20 may include microprocessor, digital signal processor (DSP, Digital Signal Processor), application-specific integrated circuit (ASIC, Application Specific Integrated Circuit), programmable logic device (PLD, Programmable Logic Device), field programmable gate array (FPGA, Field Programmable Gate Array) etc. hardware, the part or complete of each functional block can be realized by the hardware Portion.For example, processor 1001 can be installed by least one of these hardware.
(variation)
In addition, closing the term illustrated in this manual and/or carrying out understanding required term, Ke Yiyu to this specification Term with same or like meaning is interchangeable.For example, channel and/or symbol may be signal (signaling).In addition, letter Number or message.Reference signal can also be referred to as RS (Reference Signal), according to be applicable in standard, also may be used With referred to as pilot tone (Pilot), pilot signal etc..In addition, component carrier (CC, Component Carrier) be referred to as it is small Area, frequency carrier, carrier frequency etc..
In addition, radio frames can be made of in the time domain (frame) during one or more.Constitute this of radio frames or Each in multiple periods (frame) is referred to as subframe.In turn, subframe in the time domain can be by one or more time slot structures At.Subframe can be not dependent on the regular time length (such as 1ms) of parameter configuration (numerology).
In turn, time slot in the time domain can be by one or more symbols (orthogonal frequency division multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) symbol, single-carrier frequency division multiple access (SC-FDMA, Single Carrier Frequency Division Multiple Access) symbol etc.) constitute.In addition, time slot can also be based on parameter configuration Time quantum.In addition, time slot can also include multiple mini-slot.Each mini-slot in the time domain can be by one or more symbols It constitutes.In addition, mini-slot is referred to as sub-slots.
Radio frames, subframe, time slot, mini-slot and symbol indicate time quantum when transmission signal.Radio frames, son Frame, time slot, mini-slot and symbol can also use corresponding other titles.For example, a subframe can be referred to as passing Defeated time interval (TTI, Transmission Time Interval), multiple continuous subframes can also be referred to as TTI, one Time slot or a mini-slot can also be referred to as TTI.That is, subframe and/or TTI can be the subframes in existing LTE (1ms) can also be during can also be shorter than 1ms (such as 1~13 symbol) during being longer than 1ms.In addition, indicating The unit of TTI is referred to as time slot, mini-slot etc. rather than subframe.
Here, TTI for example refers to the minimum time unit dispatched in wireless communication.For example, in LTE system, wireless base It stands and each user terminal is carried out using TTI as unit distributing radio resource (frequency bandwidth, the hair that can be used in each user terminal Penetrate power etc.) scheduling.In addition, the definition of TTI is without being limited thereto.
TTI can be data packet (transmission block) by channel coding, code block, and/or code word sending time unit, It can be the processing unit of scheduling, link adaptation etc..In addition, when providing TTI, actually with transmission block, code block, and/or code The time interval (such as symbolic number) of word mapping can also be shorter than the TTI.
In addition, when a time slot or a mini-slot are referred to as TTI, more than one TTI (i.e. more than one time slot or More than one mini-slot) the minimum time unit dispatched can also be become.In addition, constitute the minimum time unit of the scheduling Timeslot number (mini-slot number) can be controlled.
TTI with 1ms time spans is referred to as conventional TTI (TTI in LTE Rel.8-12), standard TTI, length TTI, conventional subframe, standard subframe or long subframe etc..The TTI of shorter than routine TTI is referred to as compression TTI, short TTI, part TTI (partial or fractional TTI), compression subframe, short subframe, mini-slot or sub-slots etc..
In addition, long TTI (such as routine TTI, subframe etc.) can also the TTI of the apparatus time span that has more than 1ms replace It changes, short TTI (such as compression TTI etc.) can also use the TTI with TTI length shorter than the TTI length of long TTI and 1ms or more To replace.
Resource block (RB, Resource Block) is that the resource allocation unit of time domain and frequency domain may include in a frequency domain One or more continuous subcarriers (subcarrier (subcarrier)).In addition, RB may include one or more in the time domain Symbol, or a time slot, a mini-slot, a subframe or a TTI length.One TTI, subframe can be with It is made of respectively one or more resource blocks.In addition, one or more RB is referred to as Physical Resource Block (PRB, Physical RB), subcarrier group (SCG, Sub-Carrier Group), resource unit group (REG, Resource Element Group), PRG is to, RB equity.
In addition, resource block can also be made of one or more resource units (RE, Resource Element).For example, One RE can be the radio resource zone of a subcarrier and a symbol.
In addition, the structure of above-mentioned radio frames, subframe, time slot, mini-slot and symbol etc. is only example.For example, nothing Mini-slot number, time slot or the mini-slot for including in the timeslot number of number of sub frames, each subframe or radio frames that line frame includes, time slot The symbolic number in sub-carrier number and TTI that the number of the symbol and RB that include, RB include, symbol lengths, cyclic prefix The structure of (CP, Cyclic Prefix) length etc. can carry out various changes.
In addition, the information illustrated in this specification, parameter etc. can be indicated with absolute value, can also with specified value Relative value indicates, can also be indicated with corresponding other information.For example, radio resource can be referred to by defined index Show.It further, can also be clear disclosed different from this specification using formula of these parameters etc..
The title for being used for parameter etc. in the present specification is in any way all and non-limiting.For example, various Channel (physical uplink control channel (PUCCH, Physical Uplink Control Channel), physical down link Control channel (PDCCH, Physical Downlink Control Channel) etc.) and information unit can be by any suitable When title identify that therefore the various titles distributed for these various channels and information unit are any Aspect is all and non-limiting.
Information, signal for illustrating in this specification etc. can carry out table using any one in various different technologies Show.For example, data, order, instruction, information, signal, bit, symbol, the chip etc. that may be referred in above-mentioned whole explanations It can be indicated by voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or photon or their arbitrary combination.
In addition, information, signal etc. can be exported from upper layer to lower layer, and/or from lower layer to upper layer.Information, signal etc. can To be inputted or be exported via multiple network nodes.
Information, the signal etc. of input or output can be stored in specific place (such as memory), can also pass through management Table is managed.Information, the signal etc. of input or output can be capped, update or supplement.Information, signal of output etc. can be with It is deleted.Information, signal of input etc. can be addressed to other devices.
The notice of information is not limited to the mode/embodiment illustrated in this specification, can also by other methods into Row.For example, the notice of information can be by physical layer signaling (for example, down link control information (DCI, Downlink Control Information), uplink control information (UCI, Uplink Control Information)), upper layer letter Enable (for example, wireless heterogeneous networks (RRC, Radio Resource Control) signaling, broadcast message (Master Information Block (MIB, Master Information Block), system information block (SIB, System Information Block) etc.), media deposit Take control (MAC, Medium Access Control) signaling), other signals or combination thereof implemented.
In addition, physical layer signaling is referred to as L1/L2 (the 1st layer/the 2nd layer) control information (L1/L2 controls signal), L1 Control information (L1 controls signal) etc..In addition, RRC signaling is referred to as RRC information, such as can be that RRC connections are established (RRC Connection Setup) message, RRC connection reconfigurations set (RRC Connection Reconfiguration) message Deng.In addition, MAC signalings can for example be notified by MAC Control Element (MAC CE (Control Element)).
In addition, the notice (for example, the notice of " for X ") of provisioning information is not limited to explicitly carry out, it can also be implicitly (for example, by the notice without the provisioning information, or the notice that passes through other information) carries out.
About judgement, can be carried out by the value (0 or 1) indicated by 1 bit, it can also be by by true (true) or false (false) true-false value (Boolean) indicated carries out, can also by the comparison (such as comparison with specified value) of numerical value come It carries out.
No matter software be referred to as software, firmware, middleware, microcode, hardware description language, or is claimed with other titles Exhale, should all be broadly interpreted to be order, command set, code, code segment, program code, program, subprogram, software module, Application program, software application, software package, routine, subroutine, object, executable file, execution thread, step, function Deng.
In addition, software, order, information etc. can be transmitted or received via transmission medium.For example, when using cable technology (coaxial cable, optical cable, twisted-pair feeder, digital subscriber line (DSL, Digital Subscriber Line) etc.) and/or wireless skill When art (infrared ray, microwave etc.) sends software from website, server or other remote resources, these cable technologies and/or wireless Technology includes in the definition of transmission medium.
Term may be used interchangeably as " system " and " network " used in this specification.
In the present specification, " base station (BS, Base Station) ", " wireless base station ", " eNB ", " gNB ", " cell ", Term may be used interchangeably as " sector ", " cell group ", " carrier wave " and " component carrier ".Base station is sometimes also with fixed station (fixed station), NodeB, eNodeB (eNB), access point (access point), sending point, receiving point, millimicro are small The terms such as area, cell are called.
Base station can accommodate one or more (such as three) cells (also referred to as sector).When base station accommodates multiple cells When, the entire overlay area of base station can be divided into multiple smaller regions, and each smaller region can also pass through base station System (for example, indoor small base station (remote radio head (RRH, Remote Radio Head))) provides communication service. Term as " cell " or " sector " refers to the base station that communication service is carried out in the covering and/or the covering of base station sub-system The part or entirety in region.
In the present specification, " mobile station (MS, Mobile Station) ", " user terminal (user terminal) ", Term may be used interchangeably as " user apparatus (UE, User Equipment) " and " terminal ".Base station is sometimes also with solid Determine platform (fixed station), NodeB, eNodeB (eNB), access point (access point), sending point, receiving point, millimicro The terms such as Microcell, cell are called.
Mobile station is sometimes also by those skilled in the art with subscriber board, mobile unit, subscriber unit, radio-cell, long-range Unit, mobile device, wireless device, wireless telecom equipment, remote equipment, mobile subscriber station, access terminal, mobile terminal, nothing Line terminal, remote terminal, hand-held set, user agent, mobile client, client or several other terms appropriate claim It exhales.
In addition, the wireless base station in this specification can also be replaced with user terminal.For example, for by wireless base station and Communication between user terminal replaces with the structure of the communication of (D2D, Device-to-Device) between multiple user terminals, can also Using each mode/embodiment of the disclosure.At this point it is possible to by function possessed by above-mentioned wireless base station 10 as user's end Function possessed by end 20.In addition, the words such as " uplink " and " downlink " can also replace with " side ".For example, up channel also may be used To replace with side channel.
Equally, the user terminal in this specification can also be replaced with wireless base station.At this point it is possible to by above-mentioned user Function possessed by terminal 20 is as function possessed by wireless base station 10.
In the present specification, the specific action carried out by base station is set as according to circumstances sometimes also by its superior node (upper node) is carried out.Obviously, in being made of one or more network nodes (network nodes) with base station In network, the various actions that are carried out for the communication with terminal room can by base station, in addition to base stations one Above network node is (it is contemplated that such as mobile management entity (MME, Mobility Management Entity), service Gateway (S-GW, Serving-Gateway) etc., but not limited to this) or combination thereof carry out.
Each mode/the embodiment illustrated in this specification may be used alone, can also be used in combination, and can also hold It is switched over during row to use.In addition, the processing step of each mode/embodiment illustrated in this specification, sequence, stream Journey figure etc. is as long as no contradiction, so that it may to replace sequence.For example, the method illustrated in this manual is closed, with illustrative suitable Sequence gives various step unit, and is not limited to the particular order provided.
Each mode/the embodiment illustrated in this specification can be applied to utilize long term evolution (LTE, Long Term Evolution), senior long term evolution (LTE-A, LTE-Advanced), surmount long term evolution (LTE-B, LTE-Beyond), be super Grade third generation mobile communication systems (SUPER 3G), Advanced International Mobile Communications (IMT-Advanced), the 4th third-generation mobile communication system Unite (4G, 4th generation mobile communication system), the 5th Generation Mobile Communication System (5G, 5th Generation mobile communication system), following wireless access (FRA, the Future Radio Access), new wireless access technology (New-RAT, Radio Access Technology), new wireless (NR, New Radio), New wireless access (NX, New radio access), new generation of wireless access (FX, Future generation radio Access), global system for mobile communications (GSM (registered trademark), Global System for Mobile Communications), CDMA accesses 2000 (CDMA2000), super mobile broadband (UMB, Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra wide band (UWB, Ultra-WideBand), bluetooth (Bluetooth (registered trademark)), other channel radios appropriate The system of letter method and/or the Successor-generation systems extended based on them.
" according to " the such record used in this specification, as long as not being expressly recited in other paragraphs, then and unexpectedly Taste " according only to ".In other words, " according to " such record refers to both " according only to " and " according at least to ".
Any reference of the unit to using the titles such as " first ", " second " used in this specification, non-comprehensive limit The quantity or sequence of these fixed units.These titles can be as the facilitated method for distinguishing more than two units and in this specification Middle use.Therefore, be not meant to two units or first unit only can be used must for the reference of first unit and second unit If must be taken the lead in second unit with dry form.
Term as " the judging (determination) (determining) " used in this specification includes diversified sometimes Action.For example, about " judging (determination) ", it can be by calculating (calculating), reckoning (computing), processing (processing), (deriving), investigation (investigating), search (looking up) (such as table, data are derived Search in library or other data structures), confirm that (ascertaining) etc. is considered as carrying out " judging (determination) ".In addition, closing In " judge (determinations) ", can also by reception (receiving) (such as receiving information), transmission (transmitting) (such as Send information), input (input), output (output), access (accessing) (such as data in access memory) etc. regard To be to carry out " judge (determination) ".In addition, about " judging (determination) ", it can also be by solution (resolving), selection (selecting), (choosing) is selected, (establishing) is established, compares (comparing) etc. and be considered as " sentence Disconnected (determination) ".That is, about " judging (determination) ", several actions can be considered as carrying out " judging (determination) ".
" (connected) of connection " that is used in this specification, " in conjunction with (coupled) " as term or it Any deformation refer to direct or indirect any connection or combination between two or more units, may include with Lower situation：Between two units of mutual " connection " or " in conjunction with ", there are one or more temporary locations.Between unit In conjunction with or connection can be can also be or the combination that both can also be in logic physically.For example, " connection " It can also replace with " access ".When using in the present specification, it is believed that two units be by using one or one with On electric wire, cable, and/or printing electrical connection, and as several non-limiting and non-exclusive example, by using The electromagnetic energy etc. of wavelength with radio frequency field, microwave region, and/or light (both visible light and black light) region, quilt It mutually " connects " or " in conjunction with ".
Used in this specification or claims " including (including) ", " include (comprising) " and When their deformation, these terms and term " having " are equally open.Further, in this specification or claim The term " or (or) " used in book is not exclusive or.
The above, the only specific implementation mode of the disclosure, but the protection domain of the disclosure is not limited thereto, it is any Those familiar with the art the variation that can readily occur in or replaces disclosed in the embodiment of the present disclosure in technical scope It changes, should all cover within the protection domain of the disclosure.Therefore, the protection domain of the disclosure should be with the protection model of claim Subject to enclosing.

Claims (26)

1. a kind of method for transmitting the imperfect subframe of uplink in unlicensed spectrum, including：
The orthogonal layers that the quantity and imperfect subframe of the layer for the uplink specified according to uplink scheduling information are supported In quantity at least one of and the imperfect subframe demodulated reference signal DMRS symbolic numbers that include, it is true for the imperfect subframe Determine the transmission mode of DMRS；And
Using identified DMRS transmission modes, imperfect subframe is transmitted.
2. according to the method described in claim 1, further including：
Judge whether the quantity for the orthogonal layers that imperfect subframe is supported is used for transmission less than what uplink scheduling information was specified Layer quantity；
When the quantity for the orthogonal layers that it is supported is less than the quantity for the layer being used for transmission that uplink scheduling information is specified, and And the imperfect subframe only includes a DMRS symbol, which is transmitted with the orthogonal layers that it is supported, wherein
The DMRS applications code word of imperfect subframe is all that 1 orthogonal covering codes or application uplink scheduling information are specified just Hand over overlay code.
3. according to the method described in claim 1, wherein, the quantity for the layer being used for transmission that uplink scheduling information is specified It is determined as transmitting the quantity of the layer of the imperfect subframe, imperfect subframe is only specified using uplink scheduling information on each layer Cyclic shift, and all generate DMRS symbols for 1 orthogonal covering codes without orthogonal covering codes or application code word.
4. according to the method described in claim 1, further including：
It is determined as the quantity for the layer being used for transmission that uplink scheduling information is specified to transmit the number of the layer of the imperfect subframe Amount, the wherein imperfect subframe only include a DMRS symbol, and are dispatched together with other subframes by more subframe scheduling mechanism,
Wherein, on each layer, DMRS symbols included by the imperfect subframe and included by the adjacent time-slots of adjacent sub-frame DMRS symbols are used to demodulate the imperfect subframe together.
5. according to the method described in claim 1, further including：
It is determined as the quantity for the layer being used for transmission that uplink scheduling information is specified to transmit the number of the layer of the imperfect subframe Amount, the imperfect subframe are configured as not including DMRS symbols, and by more subframe scheduling mechanism and adjacent normal sub-frames one Scheduling is played,
Wherein, on each layer, the DMRS of the normal sub-frames adjacent with the imperfect subframe is for demodulating the imperfect subframe.
6. method according to claim 5, wherein
Imperfect subframe symbolic number be less than control signaling instruction a threshold value when, the imperfect subframe be configured as do not include DMRS symbols；Or
Imperfect starting subframe and imperfect end subframe are respectively configured as not including DMRS by respective individually control signaling Symbol；Or
Imperfect starting subframe and imperfect end subframe are configured to not include DMRS symbols together by common control signaling.
7. according to the method described in claim 1, further including：
It is determined as the quantity for the layer being used for transmission that uplink scheduling information is specified to transmit the number of the layer of the imperfect subframe Amount,
Only included originally position DMRS symbols identical with the position of a DMRS symbol of normal sub-frames in imperfect subframe Number when, add another DMRS symbol to imperfect subframe；Wherein, another DMRS symbol for being added and included originally DMRS symbols are used to demodulate the imperfect subframe together, the DMRS of the position and normal sub-frames of another DMRS symbol added Position is different, and the position of the DMRS symbols added can be used for determining beginning or the end position of imperfect subframe.
8. according to the method described in claim 1, wherein,
It is determined as the quantity for the layer being used for transmission that uplink scheduling information is specified to transmit the number of the layer of the imperfect subframe Amount,
When imperfect subframe only includes a DMRS symbol, the subcarrier of the DMRS symbols of imperfect subframe is divided into two groups；
DMRS into two groups of subcarriers applies identical cyclic shift on the same layer, and orthogonal covering codes are applied to two In DMRS in group subcarrier.
9. according to the method described in claim 1, wherein,
It is determined as the quantity for the layer being used for transmission that uplink scheduling information is specified to transmit the number of the layer of the imperfect subframe Amount,
When imperfect subframe only includes a DMRS symbol, the subcarrier of the DMRS symbols of imperfect subframe is divided into two groups, Wherein, first group of DMRS subcarrier is used to demodulate another part layer for demodulating a part of layer, second group of DMRS subcarrier, and Between each group of corresponding layer, only cyclic shift is applied to realize the orthogonal of interlayer.
10. according to claim 2-9 any one of them methods, further include：
According to the control signaling received to the configuration mode of imperfect subframe switching at runtime DMRS.
11. method according to claim 10, further includes：
Before carrying out DMRS configurations, the information for the configuration mode for being used to indicate the DMRS that imperfect subframe is supported is sent.
12. according to claim 1-9 any one of them methods, wherein uplink scheduling information can be configured to refer to The quantity of the layer of the uplink of fixed scheduled normal sub-frames and imperfect subframe；
Wherein, when specifying the quantity of the layer of the uplink of scheduled imperfect subframe in uplink scheduling information, can divide The quantity of subframe and the imperfect layer for terminating the respective uplink of subframe imperfect Zhi Ding not be originated；Or by common control Signaling specifies the quantity of imperfect starting subframe and the imperfect layer for terminating the same uplink that subframe uses.
13. a kind of method demodulating the imperfect subframe of uplink in unlicensed spectrum, including：
According in the quantity of the layer of the quantity of the layer of the specified uplink of uplink scheduling information and the imperfect subframe of reception At least one of and the imperfect subframe demodulated reference signal DMRS symbolic numbers that include, determine DMRS's for the imperfect subframe Configuration mode；
Based on the configuration mode of identified DMRS to extract DMRS, and imperfect subframe is solved using the DMRS of extraction It adjusts.
14. according to the method for claim 13, further including：
Judge whether the quantity for receiving the layer of imperfect subframe is less than the layer being used for transmission that uplink scheduling information is specified Quantity；
It is less than the quantity for the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe, and And the imperfect subframe is when only including a DMRS symbol, using the DMRS symbols for being demodulated to the imperfect subframe； Wherein,
The imperfect subframe is transmitted with the orthogonal layers that it is supported, the DMRS applications code word of imperfect subframe is all 1 just The orthogonal covering codes for handing over overlay code or application uplink scheduling information to specify.
15. according to the method for claim 13, wherein be equal to uplink tune in the quantity for receiving the layer of imperfect subframe When spending the quantity of the specified layer being used for transmission of information, and when the imperfect subframe only includes a DMRS symbol, this is utilized DMRS symbols are for demodulating the imperfect subframe；Wherein,
The imperfect subframe does not only have to orthogonal covering codes on each layer using the cyclic shift that uplink scheduling information is specified Or application code word all generates DMRS symbols for 1 orthogonal covering codes.
16. according to the method for claim 13, further including：
It is equal to the quantity for the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe, and And the imperfect subframe only include a DMRS symbol when,
On each layer, included by the adjacent time-slots using DMRS symbols and adjacent sub-frame included by the imperfect subframe DMRS symbols are used as two DMRS of the imperfect subframe, for being demodulated to the imperfect subframe.
17. according to the method for claim 13, further including：
It is equal to the quantity for the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe, and And the imperfect subframe be configured as not include DMRS symbols when,
On each layer, it is used as the imperfect son using the DMRS symbols of the normal sub-frames adjacent with the imperfect subframe The DMRS of frame, for being demodulated to the imperfect subframe.
18. method according to claim 17, wherein
The imperfect sub-frame configuration is not including DMRS symbols by the threshold value indicated by control signaling；Or
Imperfect starting subframe and imperfect end subframe are respectively configured as not including DMRS by respective individually control signaling Symbol；Or
Imperfect starting subframe and imperfect end subframe are configured to not include DMRS symbols together by common control signaling.
19. according to the method for claim 13, further including：
It is equal to the quantity for the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe, and Imperfect subframe includes two DMRS symbols, is used as the DMRS for the imperfect subframe using two DMRS symbols, is used It is demodulated in the imperfect subframe, the position of the position DMRS symbols corresponding to normal sub-frames of one of DMRS symbols Identical, the position of another DMRS symbol position of DMRS symbols corresponding from normal sub-frames is different, and its position is by endless Either end position determines to determine or be detected by receiving terminal for the beginning of whole subframe.
20. according to the method for claim 13, wherein
It is equal to the quantity for the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe, When imperfect subframe only includes a DMRS symbol, the subcarrier of the DMRS symbols of imperfect subframe is divided into two groups；
The imperfect subframe is demodulated according to this two groups of subcarriers for each transport layer；Wherein,
DMRS in this two groups of subcarriers has used orthogonal covering codes, and applies identical cyclic shift on the same layer.
21. according to the method for claim 13, wherein
It is equal to the quantity for the layer being used for transmission that uplink scheduling information is specified in the quantity for receiving the layer of imperfect subframe, and When imperfect subframe only includes a DMRS symbol, the subcarrier of the DMRS symbols of imperfect subframe is divided into two groups, wherein will First group of DMRS subcarrier is used to demodulate a part of layer of imperfect subframe, and second group of DMRS subcarrier is imperfect for demodulating Another part layer of subframe.
22. according to claim 14-21 any one of them methods, further include：
It sends control signaling to indicate the configuration mode to imperfect subframe switching at runtime DMRS.
23. method according to claim 22, further includes：
Before sending control instruction, the letter for the configuration mode for being used to indicate the DMRS supported for imperfect subframe is received Breath.
24. according to claim 13-21 any one of them methods, wherein uplink scheduling information to be configured to distinguish Specify the quantity of the layer of the uplink of scheduled normal sub-frames and imperfect subframe；
Wherein, when specifying the quantity of the layer of the uplink of scheduled imperfect subframe in uplink scheduling information, can divide The quantity of subframe and the imperfect layer for terminating the respective uplink of subframe imperfect Zhi Ding not be originated；Or believed by co- controlling Enable the quantity of specified imperfect starting subframe and the imperfect layer for terminating the same uplink that subframe uses.
25. a kind of user equipment, including：
Processor is configured as perform claim and requires 1-12 any one of them methods.
26. a kind of base station, including：
Processor is configured as perform claim and requires 13-24 any one of them methods.
CN201710309300.1A 2017-05-04 2017-05-04 The transmission of imperfect subframe and demodulation method, corresponding user equipment and base station Pending CN108809566A (en)

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Application publication date: 20181113