CN110557237B

CN110557237B - Wireless communication method and device for reducing network delay

Info

Publication number: CN110557237B
Application number: CN201910734251.5A
Authority: CN
Inventors: 蒋琦
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2015-11-25
Filing date: 2015-11-25
Publication date: 2021-10-29
Anticipated expiration: 2035-11-25
Also published as: CN110557237A; CN106788926B; CN106788926A

Abstract

The invention discloses a wireless communication method and a wireless communication device for reducing network delay. The UE transmits an uplink signal. The uplink signal occupies part or all of the wideband symbols of the first short slot. The duration of the first short time slot is less than 1 millisecond, the first short time slot is located in a first LTE subframe in a time domain, and the first LTE subframe comprises N short time slots. The number of wideband symbols in the first short slot is related to the position of the first short slot in the first LTE subframe. And if the first short slot is the last short slot of the N short slots and includes the last wideband symbol in the first LTE subframe, the number of wideband symbols in the first short slot is not less than K. The invention ensures the channel estimation and transmission performance of the uplink signal and avoids the conflict between the signal in the short time slot and the SRS by designing a new distribution method of the short time slot in the LTE subframe and the corresponding mapping mode of the uplink signal and the uplink reference signal.

Description

Wireless communication method and device for reducing network delay

The present application is a divisional application of the following original applications:

application date of the original application: 11/25/2015

- -application number of the original application: 201510831297.0

The invention of the original application is named: wireless communication method and device for reducing network delay

Technical Field

The present invention relates to transmission schemes in wireless communication systems, and more particularly, to a control channel method and apparatus for low latency transmission over cellular networks.

Background

The issue of reducing the delay of the LTE Network is discussed in 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #63 times overall meeting. The delay of the LTE network includes air interface delay, signal processing delay, transmission delay between nodes, and the like. With the upgrade of the radio access network and the core network, the transmission delay is effectively reduced. With the application of new semiconductors with higher processing speeds, the signal processing delay is significantly reduced.

In LTE (Long Term Evolution), a TTI (Transmission Time Interval) or a subframe or a PRB (Physical Resource Block) Pair (Pair) corresponds to one ms (milli-second) in Time. One LTE subframe includes two Time slots (Time slots), a first Slot and a second Slot, respectively. A PUCCH (Physical Uplink Control Channel) of an LTE existing system is transmitted in PRB pairs, that is, one PUCCH transmission occupies one entire LTE subframe in the time domain. The control Information transmitted by the existing PUCCH includes SR (Scheduling Request), HARQ (Hybrid Automatic Repeat Request) ACK/NACK (acknowledgement), and CSI (Channel State Information). The CSI further includes a CQI (Channel Quality Indicator), a PMI (Precoding Matrix Indicator), an RI (Rank Indicator), a PTI (Precoding Type Indicator), and a CRI (CSI-RS Resource Indicator, CSI reference signal Resource Indicator).

For a shorter TTI, a problem to be studied is that if an uplink signal, especially an uplink control signaling, is transmitted in a short slot, and the short slot is smaller than a length of an LTE slot, the conventional PUCCH resource allocation and transmission method cannot be used.

The present invention provides a solution to the above problems. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE (User Equipment) of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.

Disclosure of Invention

For the uplink control channel resource allocation in the short slot, an intuitive method is to continue the traditional uplink control signaling transmission mode, i.e. PUCCH is still transmitted on one PRB pair. This presents a direct problem in that the method does not bring the transmission low delay gain of the low delay system from the PUCCH transmission point of view. Another method is to map the uplink control channel into a short slot, but this method needs to solve the following three problems. The first problem is the distribution of short slots in one LTE subframe and the relation to SRS (Sounding Reference Signal). The second problem is that in order to ensure Multiplexing of control signaling corresponding to multiple UEs, a new sTTI-PUCCH (Short TTI PUCCH, Short slot uplink control channel) resource and a corresponding coding method of orthogonal CDM (Code Division Multiplexing) need to be redesigned for a Short slot. The third problem is the relation between the sTTI-PUCCH of different users and the sTTI-PUCCH in different short slots and the uplink reference signal.

The solution in the present invention fully considers the above problems, and provides a corresponding solution based on the way of mapping the uplink control channel into a short time slot.

The invention discloses a method in UE supporting low-delay wireless communication, which comprises the following steps:

-step a. transmitting an uplink signal. The uplink signal occupies part or all of the wideband symbols of the first short slot.

The duration of the first short time slot is less than 1 millisecond, the first short time slot is located in a first LTE subframe in a time domain, and the first LTE subframe comprises N short time slots. The short time slot includes a positive integer number of wideband symbols. The first short time slot satisfies one or more of the following conditions:

-a first condition: the number of wideband symbols in the first short slot is related to the position of the first short slot in the first LTE subframe.

-a second condition: if the first short time slot is the last short time slot in the N short time slots and the first short time slot comprises the last wideband symbol in the first LTE subframe, the number of wideband symbols in the first short time slot is not less than K; if the first short slot is the last short slot in the N short slots and the first short slot does not include the last wideband symbol in the first LTE subframe, the number of wideband symbols in the first short slot is not less than K-1. And K is the minimum value of the number of wideband symbols in the N-1 short time slots except the first short time slot in the N short time slots.

-a third condition: if the first short slot is the last short slot of the N short slots and the last wideband symbol of the first LTE subframe is reserved for SRS, the last wideband symbol of the first LTE subframe is absent from the first short slot compared to the target short slot. The target short slot is the last short slot in the second LTE subframe. Wherein the second LTE subframe does not include wideband symbols reserved for SRS.

-a fourth condition: if the first short time slot is the last short time slot in the N short time slots, the reference signal in the uplink signal is transmitted on the wideband symbol except the last wideband symbol in the first LTE subframe.

The uplink signal includes at least one of { uplink data, uplink control signaling }.

As an embodiment, the wideband symbol is an SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol.

As an embodiment, the wideband symbol is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

As one embodiment, the wideband symbol is a subband-filtered based OFDM symbol.

As one embodiment, the subcarrier spacing of the wideband symbol is 15 kHz.

As one embodiment, the subcarrier spacing of the wideband symbol is 3.75 kHz.

As an example, the first short slot satisfies { a first condition, a second condition, a third condition, a fourth condition }.

As an embodiment, the first short time slot contains only one wideband symbol for transmission of the uplink signal of the low-latency wireless communication system.

As an embodiment, that the last wideband symbol of the first LTE subframe is reserved for SRS means that the last wideband symbol of the first LTE subframe is configured as SRS by cell-specific downlink signaling. As a sub-embodiment of the present embodiment, the cell-specific downlink signaling is SoundingRS-UL-ConfigCommon IE (Information Element).

As an embodiment, that the last wideband symbol of the first LTE subframe is reserved for SRS means that the last wideband symbol of the first LTE subframe is configured as SRS by UE-specific downlink signaling. As a sub-embodiment of this embodiment, the UE-specific downlink signaling includes at least one of { soundngrs-UL-ConfigDedicated, SoundingRS-UL-configdedicatedperiodic-r 10 }.

As an embodiment, one of the short slots in the present invention carries a positive integer number of downlink Transport blocks (Transport blocks).

The essence of the first condition satisfied by the first short time slot is that: when designing the position of the first short slot in an LTE subframe and the number of occupied wideband symbols, it is necessary to consider whether the last wideband symbol of the LTE subframe is reserved for SRS. And different short time slot designs are provided for judging whether the LTE subframe contains the SRS or not, so that the spectrum resources are better utilized.

The essence of the second condition satisfied by the first short time slot is that: in an LTE subframe, if there is an SRS, the last short slot does not include a wideband symbol reserved for the SRS, and the last short slot includes at least one wideband symbol for uplink signal transmission. The advantage of this design is to ensure that the last wideband symbol except for SRS is the uplink reference signal, so as to ensure that the uplink reference signal in the system cannot be fully utilized.

The essence of the third condition satisfied by the first short time slot is that: the system can flexibly configure the number of the broadband symbols used for uplink signal transmission contained in the short time slot according to whether the SRS is reserved or not, and the flexibility and the spectrum efficiency of the system are improved.

The essence of the fourth condition satisfied by the first short time slot is that: the condition that the uplink reference signal is located in the last broadband symbol of a short time slot and is the only uplink reference signal of the short time slot is ensured, the channel estimation performance of the uplink reference signal is ensured, the channel estimation and demodulation can be started earlier, and the characteristic of low delay is fully embodied.

Specifically, according to an aspect of the present invention, the step a further includes the steps of:

-step A0. receiving a first signaling indicating a target set of subbands. The target set of subbands includes a positive integer number of subbands.

A step a1. receiving downlink data. The uplink signal comprises HARQ-ACK information aiming at the downlink data.

And the frequency domain resource occupied by the uplink signal belongs to a target subband set.

As an embodiment, the uplink signal is transmitted on a physical layer control channel. As a sub-embodiment of this embodiment, the physical layer control channel is PUCCH. As another sub-embodiment of this embodiment, the physical layer control channel is sTTI-PUCCH. The sTTI-PUCCH is used for transmitting uplink control information and is located in a broadband symbol corresponding to one short time slot.

As an embodiment, the uplink signal is transmitted on a physical layer data channel. As a sub-embodiment of this embodiment, the physical layer data channel is a PUSCH. As another sub-embodiment of this embodiment, the physical layer data channel is sTTI-PUSCH. The sTTI-PUSCH is used for transmitting uplink data information and is positioned in a broadband symbol corresponding to a short time slot.

As an embodiment, the target subband set is located within a system bandwidth of one LTE carrier.

As one embodiment, the target subband set includes a band of a positive integer number of PRBs.

As an embodiment, the target subband set consists of E subbands that are contiguous in the frequency domain. E is a positive integer.

As an embodiment, the target subband set consists of two subband subsets which are symmetrical about the center frequency point of the LTE carrier. The two sub-sets of subbands each include D contiguous subband components in the frequency domain. D is a positive integer.

As an embodiment, the frequency band occupied by the subband is a frequency band of one PRB.

As an embodiment, the frequency band occupied by the sub-band is F consecutive sub-carriers. And F is a positive integer and is equal to at least one of {2,3,4,6 }.

As an embodiment, the frequency domain resource occupied by the uplink signal is one subband in a target subband set.

As an embodiment, the frequency domain resources occupied by the uplink signal are distributed on G subbands of the target subband set. And G is a positive integer greater than 1, and the value of G is related to the number of wideband symbols for uplink signal transmission contained in the short time slot and the number of resource units occupied by the uplink signal.

As a sub-embodiment of this embodiment, the Resource unit is RE (Resource Element) of LTE.

As a sub-embodiment of this embodiment, the resource unit is a resource unit occupying 3.75kHz in the frequency domain and occupying one SC-FDMA symbol in the LTE system in the time domain.

As a sub-embodiment of this embodiment, the number of wideband symbols included in the short time slot for uplink signal transmission is S, and the number of resource units occupied by the uplink signal is M. Where M is equal to the product of S and G, and each of the G subbands contains S resource elements belonging to an uplink signal.

As an embodiment, the frequency domain resource occupied by the uplink signal is a frequency band corresponding to one PRB.

As a sub-embodiment of this embodiment, the frequency band corresponding to the PRB consists of a positive integer number of consecutive subbands.

As an embodiment, the first signaling is higher layer signaling.

As a sub-embodiment of this embodiment, the first signaling indicates the number of subbands in the target subband set and the starting frequency domain position.

As a sub-embodiment of this embodiment, the first signaling indicates the number of subbands included in one subband subset and a starting frequency domain position in the target subband set. The number of the sub-bands contained in the other sub-band subset is the same as that of the indicated sub-band subset, and the sub-bands contained in the other sub-band subset are symmetrical to the sub-bands contained in the indicated sub-band subset on the center frequency point of the LTE carrier to which the sub-band subset belongs in the frequency domain position.

The target subband set has the advantage of ensuring the frequency domain diversity gain of the uplink signal, particularly the uplink control signaling of the low-delay wireless communication system on the premise of reducing the interference with the PUCCH of the existing LTE system as much as possible. The uplink control channel of the UE is distributed to a plurality of sub-bands for transmission, so that frequency domain diversity gain is effectively obtained, and the robustness of the uplink control channel is further ensured.

Specifically, according to an aspect of the present invention, the HARQ-ACK information occupies M resource units. The M is a positive integer independent of the number of wideband symbols in the first short slot.

As an embodiment, the Resource unit is RE (Resource Element) of LTE.

As an embodiment, the resource unit is a resource unit occupying 3.75kHz in the frequency domain and occupying one SC-FDMA symbol in the LTE system in the time domain.

As one embodiment, the M resource units are distributed on a wideband symbol other than the DMRS in the first short slot.

As an embodiment, the HARQ-ACK information is indicated by a signature sequence of length M. The M modulation symbols of the signature sequence are mapped on the M resource units, respectively. The characteristic Sequence is described by at least one of { CDM, OS (Orthogonal Sequence) }. The HARQ-ACK information is transmitted on a physical layer control channel.

As an embodiment, the indexes of the M resource units corresponding to the HARQ-ACK information in the target subband set are related to the starting frequency domain position of the downlink data corresponding to the HARQ-ACK information.

Specifically, according to an aspect of the present invention, the uplink signal further includes CSI. The CSI includes at least one of { CQI, PMI, RI, PTI, CRI }. The CSI occupies Q resource units. The Q is a positive integer independent of the number of wideband symbols in the first short slot.

As an embodiment, the CRI is used to indicate a CSI-RS resource index indication configured by the UE.

As one embodiment, the Q resource units are distributed on a wideband symbol other than the DMRS in the first short slot.

As an embodiment, the CSI is indicated by a signature sequence of length Q. And mapping the Q modulation symbols of the characteristic sequence on the Q resource units respectively. The characteristic Sequence is described by at least one of { CDM, OS (Orthogonal Sequence) }. The HARQ-ACK information is transmitted on a physical layer control channel.

-step b. transmitting an uplink reference signal, said uplink reference channel being distributed over P wideband symbols in the first short slot, P being a positive integer.

As an embodiment, the wideband symbol in the first short slot is used for transmitting the uplink signal or the uplink reference signal.

As an embodiment, P is equal to 1, and the uplink reference signal is located on the first wideband symbol in the time domain in the first short time slot.

As an embodiment, P is equal to 1, and the uplink reference signal is located on the last wideband symbol in the time domain in the first short slot.

As an embodiment, P is equal to 1, and the uplink reference signal is located on a wideband symbol between two wideband symbols for transmitting uplink signals in the first short time slot.

As an embodiment, P is equal to 2, and the uplink reference signal is located in a first wideband symbol and a second wideband symbol. The first wideband symbol is the first wideband symbol of the first short slot in the time domain, and the second wideband symbol is the last wideband symbol of the first short slot in the time domain. And at least one wideband symbol used for uplink signal transmission is contained between the first wideband symbol and the second wideband symbol.

As an embodiment, the uplink reference signal and the uplink signal are transmitted by the same one or more antenna ports.

The uplink reference signal design has the advantages that the uplink reference signals are uniformly distributed on N short time slots of an LTE subframe, and two short time slots adjacent to each other in a time domain can share the uplink reference signals between the two short time slots, so that the performance of channel estimation and demodulation in uplink control and data transmission is ensured.

Specifically, according to one aspect of the present invention, it is characterized in that the frequency band occupied by the uplink reference signal is the same as the frequency band occupied by the uplink signal in the frequency domain.

As an embodiment, the frequency band occupied by the uplink reference signal is less than the bandwidth of 1 PRB.

As a sub-embodiment of this embodiment, the frequency band occupied by the uplink reference signal is a frequency band included in one sub-band, and the frequency band occupied by the sub-band is smaller than the bandwidth of 1 PRB.

As an embodiment, a frequency band occupied by the uplink reference signal is equal to a bandwidth of 1 PRB, and the bandwidth includes modulation symbols corresponding to an uplink signal that refers to the uplink reference signal for channel estimation and demodulation.

The design method of the frequency band occupied by the uplink reference signal has the advantage that when the frequency band occupied by the sub-band is smaller than the frequency band of one PRB and the information transmitted by the uplink signal is less, or the number of uplink signals needing to be transmitted simultaneously in one short time slot is less. Fewer uplink frequency domain resources and uplink reference signals can be adopted to support uplink transmission, and the flexibility and the spectrum efficiency of the system are improved.

The invention discloses a method in a base station supporting low-delay wireless communication, which comprises the following steps:

-step a. receiving an uplink signal. The uplink signal occupies part or all of the wideband symbols of the first short slot.

step A0. sending a first signaling indicating a target set of subbands. The target set of subbands includes a positive integer number of subbands.

Step A1. sending downlink data. The uplink signal comprises HARQ-ACK information aiming at the downlink data.

-step b. receiving an uplink reference signal, said uplink reference channel being distributed over P wideband symbols in the first short slot, P being a positive integer.

The invention discloses a UE device supporting low-delay wireless communication, which comprises:

-a first module: and receiving first signaling and downlink data, wherein the first signaling indicates a target subband set. The target set of subbands includes a positive integer number of subbands.

-a second module: and transmitting an uplink signal and an uplink reference signal. The uplink signal occupies a part of the wideband symbols of the first short slot. The uplink reference signals are distributed over P wideband symbols in the first short slot, P being a positive integer. The uplink signal comprises HARQ-ACK information aiming at the downlink data.

And the frequency domain resource occupied by the uplink signal belongs to a target subband set. Specifically, according to an aspect of the present device, the HARQ-ACK information occupies M resource units. The M is a positive integer independent of the number of wideband symbols in the first short slot.

Specifically, according to one aspect of the present device, the uplink signal further includes CSI. The CSI includes at least one of { CQI, PMI, RI, PTI, CRI }. The CSI occupies Q resource units. The Q is a positive integer independent of the number of wideband symbols in the first short slot.

Specifically, according to one aspect of the present device, it is characterized in that the frequency band occupied by the uplink reference signal is the same as the frequency band occupied by the uplink signal in the frequency domain.

The invention discloses a base station device supporting low-delay wireless communication, which comprises:

-a first module: and sending a first signaling and downlink data, wherein the first signaling indicates a target subband set. The target set of subbands includes a positive integer number of subbands.

-a second module: an uplink signal and an uplink reference signal are received. The uplink signal occupies a part of the wideband symbols of the first short slot. The uplink signal comprises HARQ-ACK information aiming at the downlink data, the uplink reference signal is distributed on P broadband symbols in the first short time slot, and P is a positive integer.

-a first condition: the number of wideband symbols in the first short slot is related to the position of the first short slot in the first LTE subframe

Specifically, according to an aspect of the present device, the HARQ-ACK information occupies M resource units. The M is a positive integer independent of the number of wideband symbols in the first short slot.

Compared with the prior art, the invention has the following technical advantages:

designing a short slot distribution for a low latency wireless communication system while taking into account whether the last wideband symbol of an LTE subframe is reserved for SRS. The invention comprehensively considers the density of the uplink reference signal and the transmission performance of the uplink signal, and provides the number of broadband symbols occupied by the uplink reference signal and the design corresponding to the distribution of the uplink reference signal so as to ensure the overall spectrum efficiency of the system.

Designing a target subband set for uplink control signaling transmission, and distributing an uplink control channel of a UE to multiple subbands for transmission, so as to effectively obtain frequency domain diversity gain, thereby ensuring robustness of the uplink control channel.

The uplink reference signals are uniformly distributed in N short time slots of an LTE subframe, and two short time slots adjacent in the time domain may share the uplink reference signal located between the two short time slots, so as to ensure the performance of channel estimation and demodulation during uplink control and data transmission.

By means of mapping the uplink reference signal to the same frequency band as the uplink signal, the uplink transmission is supported by using fewer uplink frequency domain resources and uplink reference signals, and the flexibility and the spectrum efficiency of the system are improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 shows a flow chart of one transmitting and receiving embodiment according to the present invention.

Fig. 2(a) to 2(d) show schematic diagrams of distribution of one short slot in an LTE subframe according to the present invention. Wherein the LTE subframe comprises 4 wideband symbols for uplink reference signal transmission, and the 4 wideband symbols for uplink reference signal transmission belong to four different short time slots. Wherein fig. 2(a) and fig. 2(b) are directed to the case where SRS is not included and SRS is included in the N-CP (Normal-Cyclic Prefix) scenario. Wherein fig. 2(c) and fig. 2(d) are for the case of not including SRS and including SRS in the E-CP (Extended-Cyclic Prefix) scenario.

Fig. 3(a) to 3(d) show schematic diagrams of distribution of one short slot in an LTE subframe according to the present invention. Wherein the LTE subframe comprises 4 wideband symbols for uplink reference signal transmission, and the 4 wideband symbols for uplink reference signal transmission can be shared by different short time slots. Where fig. 3(a) and 3(b) address the cases of no SRS inclusion and SRS inclusion in the N-CP scenario. Wherein fig. 3(c) and fig. 3(d) are for the case of no SRS inclusion and SRS inclusion in the E-CP scenario.

Fig. 4(a) to 4(d) show schematic diagrams of distribution of one short slot in an LTE subframe according to the present invention. Wherein the LTE subframe comprises 4 wideband symbols for uplink reference signal transmission, and each short slot comprises only one wideband symbol for transmitting uplink control or uplink data. Where fig. 4(a) and 4(b) address the cases of no SRS inclusion and SRS inclusion in the N-CP scenario. Wherein fig. 4(c) and 4(d) are for the case of no SRS inclusion and SRS inclusion in the E-CP scenario.

Fig. 5(a) shows a schematic diagram of a subband according to the present invention.

Fig. 5(b) shows a schematic diagram of a subband pair according to the present invention. Wherein the subband pair consists of two subbands consecutive in the frequency domain.

Fig. 5(c) shows a schematic diagram of a subband pair according to the present invention. Wherein the subband pair consists of two subbands that are discrete in the frequency domain.

Fig. 6(a) shows a schematic diagram of a target set of subbands according to the present invention. Wherein the subbands constituting the target set of subbands are contiguous in a frequency domain.

Fig. 6(b) shows a schematic diagram of a target subband set according to the present invention. Wherein the target set of subbands consists of two subband subsets.

Fig. 6(c) shows a schematic diagram of a target subband set according to the present invention. Wherein the subbands constituting the target set of subbands are discrete in a frequency domain.

Fig. 7(a) is a diagram showing a manner in which modulation symbols of an uplink signal are mapped into subbands. Wherein the number of sub-carriers occupied by the sub-band is equal to 12.

Fig. 7(b) is a diagram showing a manner in which modulation symbols of an uplink signal are mapped into subbands. Wherein the number of sub-carriers occupied by the sub-band is equal to 6.

Fig. 7(c) is a diagram showing a manner in which modulation symbols of an uplink signal are mapped into subbands. Wherein the mapping is discrete between sub-bands.

Fig. 8 shows a schematic diagram of a mapping manner of an sTTI-PUCCH resource and a target subband set.

Fig. 9 shows a schematic diagram of a mapping scheme of modulation symbols and resource units corresponding to uplink control signals within one sTTI-PUCCH resource.

Fig. 10 shows a manner of resource mapping for transmission of one uplink control signaling in sTTI-PUSCH according to the present invention.

Fig. 11 shows a block diagram of a processing device in a UE according to an embodiment of the present invention.

Fig. 12 shows a block diagram of a processing device in a base station according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a flow chart of an embodiment of transmitting and receiving, as shown in fig. 1. In fig. 1, base station N1 is a serving cell maintaining base station for UE U2.

For base station N1, first signaling is sent in step S11. The first signaling indicates a target set of subbands. The target set of subbands includes a positive integer number of subbands.

As an embodiment, the first signaling is higher layer signaling.

For the UE U2, first signaling is received in step S21. The first signaling indicates a target set of subbands. The target set of subbands includes a positive integer number of subbands.

For the base station N1, downlink data is transmitted in step S12. The uplink signal comprises HARQ-ACK information aiming at the downlink data.

For the UE U2, downlink data is received in step S22. The uplink signal comprises HARQ-ACK information aiming at the downlink data.

For the UE U2, an uplink signal is transmitted in step S23. The uplink signal occupies part or all of the wideband symbols of the first short slot.

As one embodiment, the wideband symbol is a subband-filtered based OFDM symbol.

As one embodiment, the subcarrier spacing of the wideband symbol is 15 kHz.

As one embodiment, the subcarrier spacing of the wideband symbol is 3.75 kHz.

As an embodiment, the SRS is configured by LTE Cell-specific signaling soundgrs-UL-ConfigCommon and is sent by higher layer signaling.

As an embodiment, the SRS is configured by at least one of LTE UE-specific signaling { SondinggRS-UL-ConfigDedacted, SondinggRS-UL-ConfigDedacted-r 10} and is sent by higher layer signaling.

For base station N1, an uplink signal is received in step S13. The uplink signal occupies part or all of the wideband symbols of the first short slot.

For the UE U2, uplink reference signals distributed over P wideband symbols in the first short slot, P being a positive integer, are transmitted in step S24.

For the base station N1, uplink reference signals distributed over P wideband symbols in the first short slot, P being a positive integer, are received in step S14.

Example 2

Embodiment 2 shows a schematic diagram illustrating the distribution of one short slot in an LTE subframe according to the present invention. Wherein the LTE subframe comprises 4 wideband symbols for uplink reference signal transmission, and the 4 wideband symbols for uplink reference signal transmission belong to four different short time slots. Fig. 2(a) and 2(b) are directed to the case where the SRS is not configured and the SRS is configured in the N-CP (Normal-Cyclic Prefix) scenario. Wherein fig. 2(c) and fig. 2(d) are directed to the case where the SRS is not configured and the SRS is configured in the E-CP (Extended-Cyclic Prefix) scenario. As shown in fig. 2(a) to 2(d), one LTE subframe includes 4 short slots. The part marked with "x" in the figure corresponds to a resource unit occupied by an uplink signal in the xth short time slot, and the uplink signal and the uplink reference signal Y in the xth short time slot form the xth short time slot and are transmitted by the same antenna port(s) (i.e., the uplink reference signal Y can be used for channel estimation and demodulation of the uplink signal in the xth short time slot). (x, Y) corresponds to (1, I), (2, II), (3, III), (4, IV) in fig. 2(a) to 2 (d).

As an auxiliary sub-embodiment of this sub-embodiment, in an N-CP scenario, the UE determines whether the short timeslot configuration refers to fig. 2(a) or fig. 2(b) by reading at least soundrs-UL-ConfigCommon signaling in higher layer signaling { soundgrs-UL-ConfigCommon, soundgrs-UL-ConfigDedicated, soundgrs-UL-configdedicatedperiodic-r 10 }.

As an auxiliary sub-embodiment of this sub-embodiment, in an E-CP scenario, the UE determines whether the short timeslot configuration refers to fig. 2(c) or fig. 2(d) by reading at least soundrs-UL-ConfigCommon signaling in higher layer signaling { soundgrs-UL-ConfigCommon, soundgrs-UL-ConfigDedicated, soundgrs-UL-configdedicatedperiodic-r 10 }.

Example 3

Embodiment 3 shows a schematic diagram of the distribution of one short slot in an LTE subframe according to the present invention. Wherein the LTE subframe comprises 4 wideband symbols for uplink reference signal transmission, and the 4 wideband symbols for uplink reference signal transmission can be shared by different short time slots. Wherein fig. 3(a) and 3(b) are for the case of no SRS configuration and SRS configuration in the N-CP scenario. Wherein fig. 3(c) and fig. 3(d) are for the case of no SRS configuration and SRS configuration in the E-CP scenario. As shown in fig. 3(a) to 3(d), one LTE subframe includes 4 short slots.

As a sub-embodiment, the part marked with "x" in the figure corresponds to the resource unit occupied by the uplink signal in the xth short time slot, the uplink signal in the xth short time slot and the uplink reference signal Y constitute the first short time slot, and are transmitted by the same antenna port(s) (i.e. the uplink reference signal Y can be used for channel estimation and demodulation of the uplink signal in the first short time slot). (x, Y) corresponds to (1, I), (2, II), (3, III), (4, IV) in fig. 2(a) to 2 (d).

As another sub-embodiment, the part marked with "x" in the figure corresponds to the resource unit occupied by the uplink signal in the xth short time slot. The uplink signal, the uplink reference signal Y and the uplink reference signal Z in the xth short slot constitute the xth short slot and are transmitted by the same antenna port(s) (i.e., the uplink reference signal Y can be used for channel estimation and demodulation of the uplink signal in the xth short slot). (x, Y, Z) corresponds to (1, I, II), (2, II, III), (3, III, IV) in FIGS. 3(a) to 3 (d). When (x, Y) corresponds to (4, IV) in fig. 3(a) to 3(d), the uplink reference signal Z is not present (i.e., the uplink signal in the 4 th short slot and the uplink reference signal 4 constitute the 4 th short slot).

As an auxiliary sub-embodiment of this sub-embodiment, in an N-CP scenario, the UE determines whether the short timeslot configuration refers to fig. 3(a) or fig. 3(b) by reading at least soundrs-UL-ConfigCommon signaling in higher layer signaling { soundgrs-UL-ConfigCommon, soundgrs-UL-configdedicatedperidic-r 10 }.

As an auxiliary sub-embodiment of this sub-embodiment, in an E-CP scenario, the UE determines whether the short timeslot configuration refers to fig. 3(c) or fig. 3(d) by reading at least soundrs-UL-ConfigCommon signaling in higher layer signaling { soundgrs-UL-ConfigCommon, soundgrs-UL-configdedicatedperidic-r 10 }.

Example 4

Embodiment 4 shows a schematic diagram of the distribution of one short slot in an LTE subframe according to the present invention. Wherein the LTE subframe comprises 5 wideband symbols for uplink reference signal transmission, the short slots each comprise only one wideband symbol for uplink signal transmission, and the 5 wideband symbols for uplink reference signal transmission may be shared by different short slots. Wherein fig. 4(a) and 4(b) are for the case of no SRS configuration and SRS configuration in the N-CP scenario. Wherein fig. 4(c) and fig. 4(d) are for the case of not configuring SRS and configuring SRS in the E-CP scenario.

As a sub-embodiment, the part marked with "x" in the figure corresponds to the resource unit occupied by the uplink signal in the xth short time slot, the uplink signal in the xth short time slot and the uplink reference signal Y constitute the first short time slot, and are transmitted by the same antenna port(s) (i.e. the uplink reference signal Y can be used for channel estimation and demodulation of the uplink signal in the first short time slot).

In fig. 4(a), (x, Y) corresponds to (1, I), (2, II), (3, II), (4, III), (5, III), (6, IV), (7, IV), (8, V), (9, V).

In fig. 4(b), (x, Y) corresponds to (1, I), (2, II), (3, II), (4, III), (5, III), (6, IV), (7, IV), (8, V).

In fig. 4(c), (x, Y) corresponds to (1, I), (2, I), (3, II), (4, II), (5, III), (6, III), (7, IV), (8, IV).

In fig. 4(d), (x, Y) corresponds to (1, I), (2, I), (3, I), (4, II), (5, II), (6, III), (7, III), (8, III).

As an auxiliary sub-embodiment of this sub-embodiment, in an N-CP scenario, the UE determines whether the short timeslot configuration refers to fig. 4(a) or fig. 4(b) by reading at least soundrs-UL-ConfigCommon signaling in higher layer signaling { soundgrs-UL-ConfigCommon, soundgrs-UL-ConfigDedicated, soundgrs-UL-configdedicatedperiodic-r 10 }.

As an auxiliary sub-embodiment of this sub-embodiment, in an E-CP scenario, the UE determines whether the short timeslot configuration refers to fig. 4(c) or fig. 4(d) by reading at least soundrs-UL-ConfigCommon signaling in higher layer signaling { soundgrs-UL-ConfigCommon, soundgrs-UL-ConfigDedicated, soundgrs-UL-configdedicatedperiodic-r 10 }.

Example 5(a)

Example 5(a) shows a schematic of a sub-band according to the present invention.

As an embodiment, the frequency band occupied by the subband is a half PRB frequency band, i.e. 90 kHz.

As an embodiment, the frequency band occupied by the sub-band is 45 kHz.

As an example, the frequency band occupied by the sub-band is 22.5 kHz.

Example 5(b)

Embodiment 5(b) shows a schematic diagram of a subband pair according to the present invention. Wherein the subband pair consists of two subbands consecutive in the frequency domain.

As an embodiment, both subbands in the subband pair belong to a target subband set.

As an embodiment, two subbands in the subband pair are contiguous in the frequency domain.

Example 5(c)

Embodiment 5(c) shows a schematic diagram of a subband pair according to the present invention. Wherein the subband pair consists of two subbands that are discrete in the frequency domain.

As an embodiment, the center frequency points of the two subbands in the subband pair are symmetric with respect to the center frequency point of the LTE carrier.

As an embodiment, the frequency band occupied by the subband is a frequency band of one PRB, the corresponding sequence numbers of the PRB occupied by the two subbands are i and j, respectively, and the sum of i and j is equal to N _ RB. The N _ RB is equal to the number of PRBs contained in the LTE carrier to which the subband pair belongs.

Example 6(a)

Embodiment 6(a) shows a schematic diagram of a target subband set according to the present invention. Wherein the subbands constituting the target set of subbands are contiguous in a frequency domain.

As a sub-embodiment of this embodiment, the first signaling for indicating the target subband set includes at least one of:

-number of subbands in the target set of subbands;

-a frequency domain position of a starting subband in the target set of subbands;

-the frequency domain position of the PRB containing the starting subband in the target subband set;

-a width of a frequency band occupied by a subband in the target set of subbands;

example 6(b)

Embodiment 6(b) shows a schematic diagram of one target subband set according to the present invention. Wherein the target subband set consists of two subband subsets.

As a sub-implementation of this embodiment, the target subband set includes 2D subbands, and each subband subset includes D subbands. D is a positive integer.

As an auxiliary embodiment of the sub-embodiment, the sub-band subset is symmetric with respect to a central frequency point of the LTE carrier.

As an auxiliary embodiment of the sub-embodiment, the frequency band occupied by the subband is a frequency band of a PRB, and the subband number in the subband subset located in the low frequency band is i, where i is an even number greater than or equal to 0 and less than or equal to 2D-2. The number of the sub-bands in the sub-band set of the sub-bands located in the high frequency band is j, and j is an odd number which is greater than or equal to 1 and less than or equal to 2D-1. The corresponding sequence numbers of PRBs occupied by the sub-band i and the sub-band j are m and n respectively. Specifically, the difference between j and i is 1, and the sum of m and N is equal to N _ RB. The N _ RB is equal to the number of PRBs contained in the LTE carrier to which the subband pair belongs.

-number of subbands in the target set of subbands;

-a frequency domain position of a starting subband of one subband subset of the target subband set;

-a frequency domain position of a PRB for a starting subband of one subband subset of the target subband set;

example 6(c)

Embodiment 6(c) shows a schematic diagram of a target subband set according to the present invention. Wherein the subbands constituting the target set of subbands are discrete in a frequency domain.

As a sub-embodiment of this embodiment, the target subband set includes E subbands, and the frequency domain interval between each two subbands in the E subbands is G kHz.

As an additional embodiment of this sub-embodiment, the frequency bandwidth occupied by the sub-band is G1kHz, and G is an integer multiple of G1.

Example 7(a)

Embodiment 7(a) shows a schematic diagram of a manner in which modulation symbols of an uplink signal are mapped into subbands. The squares identified by diagonal lines are resource units for transmitting uplink reference signals.

Wherein the number of sub-carriers occupied by the sub-band is equal to 12. The uplink signal generates M modulation symbols. As a sub-embodiment, M is equal to 12. As an example, the mapping scheme (I) in fig. 7(a) shows a mapping scheme in which modulation symbols of an uplink signal are mapped to subbands. The mapping mode is that the modulation symbol sequences corresponding to the uplink signals are sequentially mapped to the resource units identified by {0, 1, …, M-1}, that is, the resource units are mapped from the lowest subcarrier in one subband according to a { time domain first, frequency domain second }.

As another example, mapping scheme (II) in fig. 7(a) shows another mapping scheme in which modulation symbols of an uplink signal are mapped to subbands. The mapping mode is that the modulation symbol sequences corresponding to the uplink signals are sequentially mapped to the resource units identified by {0, 1, …, M-1}, namely, the resource units are mapped from the lowest subcarrier in one subband according to a { frequency domain first, time domain second }.

Example 7(b)

Embodiment 7(b) shows a schematic diagram of a manner in which modulation symbols of an uplink signal are mapped into subbands. The squares identified by diagonal lines are resource units for transmitting uplink reference signals.

Wherein the number of sub-carriers occupied by the sub-band is equal to 6. The uplink signal generates M modulation symbols. As a sub-embodiment, M is equal to 12.

As a sub-embodiment, the mapping scheme (I) in fig. 7(b) shows a mapping scheme in which modulation symbols of an uplink signal are mapped to subbands. The mapping mode is that the modulation symbol sequences corresponding to the uplink signals are sequentially mapped to the resource units identified by {0, 1, …, M-1}, that is, the resource units are mapped from the lowest subcarrier in one subband pair according to a { time domain first, frequency domain second }.

As another sub-embodiment, the mapping scheme (II) in fig. 7(b) shows another mapping scheme for mapping the modulation symbols of an uplink signal into subbands. The mapping mode is that the modulation symbol sequences corresponding to the uplink signals are sequentially mapped to the resource units identified by {0, 1, …, M-1}, that is, the resource units are mapped from the lowest subcarrier in one subband pair according to a { frequency domain first, time domain second }.

Example 7(c)

Embodiment 7(c) shows a schematic diagram of a manner in which modulation symbols of an uplink signal are mapped into subbands. The squares identified by diagonal lines are resource units for transmitting uplink reference signals.

Wherein the mapping is discrete between sub-bands. The uplink signal generates M modulation symbols.

As a sub-embodiment, M is equal to 12.

As a sub-embodiment, scenario 1 corresponds to a mapping manner in which one sub-band occupies 6 sub-carriers in the frequency domain. And the mapping mode is that the modulation symbol sequence corresponding to the uplink signal is sequentially mapped to the resource unit identified by {0, 1, …, M-1}, that is, M modulation symbols are mapped to D1 subbands with continuous sequence numbers according to a { time domain first, subband second }.

As an additional embodiment of this sub-embodiment, the sub-band contains K1 wideband symbols for transmitting uplink signals, and D1 is equal to the quotient of M divided by K1.

Specifically, as a dependent embodiment of this subsidiary embodiment, said D1 is equal to 4, and said K1 is equal to 3.

As a subsidiary embodiment of the sub-embodiment, the D1 serial number continuous sub-bands are discrete in the frequency domain.

As a sub-embodiment, scenario 2 corresponds to a mapping manner in which one sub-band occupies 12 sub-carriers in the frequency domain. And the mapping mode is that the modulation symbol sequence corresponding to the uplink signal is sequentially mapped to the resource unit identified by {0, 1, …, M-1}, that is, M modulation symbols are mapped to D2 subbands with continuous sequence numbers according to a { time domain first, subband second }.

As an additional embodiment of this sub-embodiment, the sub-band contains K2 wideband symbols for transmitting uplink signals, and D2 is equal to the quotient of M divided by K1.

Specifically, as a dependent embodiment of this subsidiary embodiment, said D2 is equal to 4, and said K2 is equal to 3.

As a subsidiary embodiment of the sub-embodiment, the D2 serial number continuous sub-bands are discrete in the frequency domain.

Example 8

Embodiment 8 shows a schematic diagram of a mapping manner of an sTTI-PUCCH resource and a target subband set. The squares identified by diagonal lines are resource units for transmitting uplink reference signals.

As a sub-embodiment, as shown in the left diagram of fig. 8, the uplink control signals are orthogonal on the time-frequency resource. And the subband # i and the subband # (i +1) form a target subband set for transmitting the HARQ-ACK information on the corresponding short time slot. The English lowercase letter a represents an sTTI-PUCCH resource, and a resource unit occupied by the sTTI-PUCCH is used for transmitting HARQ-ACK information; by analogy, the English lowercase letter f represents an sTTI-PUCCH resource, and a resource unit occupied by the sTTI-PUCCH is used for transmitting HARQ-ACK information. The resource unit denoted by "x" in the drawing corresponds to the resource unit occupied by the uplink reference signal referred to by the sTTI-PUCCH resource # x. x is an integer of 0 to 5 inclusive.

In the figure, the target subband set composed of 2 subbands contains 6 sTTI-PUCCH resources in total, and can carry 6 HARQ-ACK information at most, and the resource units corresponding to each HARQ-ACK information are orthogonal in the time-frequency domain.

Specifically, as a sub-embodiment, one short slot includes S wideband symbols for uplink signal transmission, one HARQ-ACK information includes M modulation symbols, one target subband set includes E subbands, the subbands include F consecutive subcarriers, and the number of resources of sTTI-PUCCH that can be included in the subband set is equal to R. R is a positive integer and is equal to (s.e.f/M). Wherein S, E, F and M are positive integers.

Specifically, as shown in the figure, as a subsidiary embodiment, the R sTTI-PUCCH resources are ordered according to { frequency domain first, subband second }.

Specifically, as an auxiliary embodiment, the index of the modulation symbol occupied by the HARQ-ACK information corresponding to the downlink data of the user is the sequence number of the sTTI-PUCCH resource used for transmitting the HARQ-ACK information. And the sequence number of the sTTI-PUCCH resource is related to the initial frequency domain position of the downlink data. Specifically, the sequence number of the sTTI-PUCCH resource is in a linear relationship with n _ sTTI _ PUCCH, where the n _ sTTI _ PUCCH is equal to a remainder modulo R of the sequence number of the starting PRB of the downlink data.

As a sub-embodiment, as shown in the right diagram of fig. 8, the uplink control signals are multiplexed on the time-frequency resources. And the subband # j and the subband # (j +1) form a target subband set for transmitting the HARQ-ACK information on the corresponding short time slot. And the English lower case letter a represents an sTTI-PUCCH resource group used for transmitting 4 pieces of user HARQ-ACK information, and each sTTI-PUCCH resource in the sTTI-PUCCH resource group is multiplexed by orthogonal coding. By analogy, the lower case letter f in English indicates an sTTI-PUCCH resource group used for transmitting 4 pieces of user HARQ-ACK information, and each sTTI-PUCCH resource in the sTTI-PUCCH resource group is multiplexed through orthogonal coding. The resource unit denoted by "y" in the drawing corresponds to the resource unit occupied by the uplink reference signal referred to by the sTTI-PUCCH resource group # y. y is an integer of 0 to 5 inclusive.

In the figure, a target subband set composed of 2 subbands totally contains 6 sTTI-PUCCH resource groups, each sTTI-PUCCH resource group contains 4 sTTI-PUCCH resources, and the target subband set can carry 24 sTTI-PUCCH resources at most, corresponding to 24 HARQ-ACK information.

Specifically, as a sub-embodiment, the number of reusable sTTI-PUCCH resources in the sTTI-PUCCH resource group is related to the number of wideband symbols included in the short slot and the number of consecutive subcarriers corresponding to the frequency band occupied by the sub-band. As a sub-embodiment, the number of the reusable sTTI-PUCCH resources in the sTTI-PUCCH resource group is configured by a higher layer signaling.

Specifically, as a sub-embodiment, one short slot includes S wideband symbols for uplink signal transmission, one HARQ-ACK information includes M modulation symbols, one target subband set includes E subbands, the subbands include F consecutive subcarriers, the sTTI-PUCCH resource group can multiplex C sTTI-PUCCH resources at most, and the maximum number of sTTI-PUCCH resources that can be included in the subband set is equal to R. R is a positive integer and equal to (C S E F/M). Wherein S, E, F, M and C are positive integers.

Specifically, as shown in the figure, as a subsidiary embodiment, the R sTTI-PUCCH resources are ordered according to an order of { orthogonal code first, frequency domain second, subband third }.

Specifically, as an auxiliary embodiment, an index of a modulation symbol occupied by HARQ-ACK information corresponding to downlink data of a user is a sequence number of an sTTI-PUCCH resource corresponding to the HARQ-ACK modulation symbol. And the sequence number of the sTTI-PUCCH resource is related to the initial frequency domain position of the downlink data. Specifically, the sequence number of the sTTI-PUCCH resource is in a linear relationship with n _ sTTI _ PUCCH, where the n _ sTTI _ PUCCH is equal to a remainder modulo R of the sequence number of the starting PRB of the downlink data.

Example 9

Embodiment 9 shows a schematic diagram of a mapping scheme between modulation symbols and resource units corresponding to uplink control signals within one sTTI-PUCCH resource. The squares identified by the slashes are resource units occupied for transmission of uplink reference signals used for channel estimation and demodulation of sTTI-PUCCH resources # i and sTTI-PUCCH resource groups # j.

As a sub-embodiment, sub-embodiment 1 shows a mapping manner in which uplink control signals are orthogonal on time-frequency resources. That is, within the resource unit occupied by one sTTI-PUCCH resource, the modulation symbol sequence corresponding to HARQ-ACK information is sequentially mapped to the resource units identified by {0, 1, …, 12}, that is, the resource unit mapping is started from the lowest subcarrier according to the { time domain first, frequency domain second }.

As a sub-embodiment, the sub-embodiment 2 shows a mapping manner of multiplexing uplink control signals on time-frequency resources. That is, within the resource unit occupied by one sTTI-PUCCH resource, the modulation symbol sequences corresponding to HARQ-ACK are sequentially mapped to the resource units identified by {0, 1, …, 12}, that is, the resource units are mapped from the lowest subcarrier in the manner of { time domain first, frequency domain second }. And code division multiplexing a plurality of sTTI-PUCCH resources on a resource unit corresponding to one sTTI-PUCCH resource group.

Example 10

Embodiment 10 shows a manner of resource mapping for transmission of uplink control signaling in sTTI-PUSCH according to the present invention. As shown, mapping (I) to mapping (IV) are four possible, alternative sub-embodiments of the system.

In the mapping method (I), as a sub-embodiment, the wideband symbol occupied by the uplink reference signal corresponding to a short timeslot reference is located before the short timeslot.

As a sub-embodiment, the mapping method (II) is that the wideband symbol occupied by the uplink reference signal corresponding to a short-slot reference is located after the short-slot.

As a sub-embodiment, the mapping method (III) is that the wideband symbol occupied by the uplink reference signal corresponding to a short-slot reference is located in the short-slot.

As a sub-embodiment, the mapping manner (IV) is that the uplink reference signal corresponding to a short slot reference occupies 2 wideband symbols, and the two wideband symbols are located at the front and the rear of the short slot.

As shown in fig. 10, the uplink control signaling includes HARQ-ACK information and CSI. The HARQ-ACK information includes M modulation symbols. The CSI includes Q modulation symbols. Wherein M and Q are both positive integers. As a sub-embodiment, M is equal to 12. As a sub-embodiment, Q is equal to 12. And the HARQ-ACK information and the modulation symbol sequence corresponding to the CSI are sequentially mapped to the resource units marked by {0, 1, …, 12}, and the mapping of the resource units is started from the lowest subcarrier.

Example 11

Embodiment 11 shows a block diagram of a processing apparatus in a UE according to an embodiment of the present invention; as shown in fig. 11. In fig. 11, the UE processing apparatus 200 is mainly composed of a first module 201 and a second module 202.

A first module 201: and receiving first signaling and downlink data, wherein the first signaling indicates a target subband set. The target set of subbands includes a positive integer number of subbands.

A second module 202: and transmitting an uplink signal and an uplink reference signal. The uplink signal occupies a part of the wideband symbols of the first short slot. The uplink reference signals are distributed over P wideband symbols in the first short slot, P being a positive integer. The uplink signal comprises HARQ-ACK information aiming at the downlink data.

And the frequency domain resource occupied by the uplink signal belongs to a target subband set. As an embodiment, the wideband symbol is an SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol. And the subcarrier spacing of the wideband symbol is 15 kHz.

As an embodiment, the first short slot satisfies { the second condition, the third condition }.

As an embodiment, the number of wideband symbols for uplink signal transmission included in the first short slot is not less than the number of wideband symbols for uplink signal transmission included in the second short slot. And the second short time slot is the short time slot which contains the least number of broadband symbols used for uplink signal transmission in the N-1 short time slots except the first short time slot in the LTE subframe.

As an embodiment, the LTE subframe supports a plurality of different short slot configuration modes, where the different short slot configuration modes include at least one of the following differences:

number of short slots contained in an LTE sub-frame

-number of wideband symbols contained per short time slot

Number and position of wideband symbols occupied by the uplink reference signal

And the various different short time slot configuration modes are predefined, and the adopted short time slot configuration mode is obtained by the high-level signaling and the sounding signaling reading LTE Cell-specific (Cell-specific) signaling. Wherein the signaling SoundingRS-UL-ConfigCommon is obtained by high layer signaling.

Example 12

Embodiment 12 shows a block diagram of a processing apparatus in a base station according to an embodiment of the present invention; as shown in fig. 12. In fig. 12, the base station processing apparatus 300 is mainly composed of a first module 301 and a second module 302.

The first module 301: and sending a first signaling and downlink data, wherein the first signaling indicates a target subband set. The target set of subbands includes a positive integer number of subbands.

-a second module 302: an uplink signal and an uplink reference signal are received. The uplink signal occupies a part of the wideband symbols of the first short slot. The uplink signal comprises HARQ-ACK information aiming at the downlink data, the uplink reference signal is distributed on P broadband symbols in the first short time slot, and P is a positive integer.

As an embodiment, the number of wideband symbols for uplink signal transmission included in the first short slot is not less than the number of wideband symbols for uplink signal transmission included in the second short slot. And the second short time slot is the short time slot which contains the minimum number of wideband symbols used for uplink signal transmission in the N short time slots of the LTE subframe.

number of short slots contained in an LTE sub-frame

-number of wideband symbols contained per short time slot

Number and position of wideband symbols occupied by the uplink reference signal

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE in the present invention includes but is not limited to a mobile phone, a tablet computer, a notebook, a network card, a vehicle-mounted communication device, and other wireless communication devices. The base station in the present invention includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method in a UE supporting low-delay wireless communication, comprising the steps of:

step a. transmitting an uplink signal on a physical layer data channel, the uplink signal occupying part or all of the OFDM symbols of the first short slot;

the duration of the first short time slot is less than 1 millisecond, the first short time slot is located in a first LTE subframe in a time domain, the first LTE subframe is composed of N short time slots, N is a positive integer greater than 1, and the short time slot comprises a positive integer number of OFDM symbols; the first short time slot is the last short time slot in the N short time slots, and the reference signal in the uplink signal is transmitted on OFDM symbols except the last OFDM symbol in the first LTE subframe; if the first short slot comprises the last OFDM symbol in the first LTE subframe, the number of the OFDM symbols in the first short slot is not less than K; if the last OFDM symbol in the first LTE subframe is not included in the first short time slot, the number of the OFDM symbols in the first short time slot is not less than K-1; k is the minimum value of the number of OFDM symbols in N-1 short time slots except the first short time slot in the N short time slots; the uplink signal includes at least one of uplink data or uplink control signaling.

2. The method of claim 1, wherein step a further comprises the steps of:

-step A0. receiving a first signaling indicating a target set of subbands comprising a positive integer number of subbands;

a step a1, receiving downlink data, wherein the uplink signal comprises HARQ-ACK information for the downlink data;

the frequency domain resource occupied by the uplink signal belongs to a target sub-band set, the HARQ-ACK information occupies M resource units, and M is a positive integer irrelevant to the number of OFDM symbols in the first short time slot.

3. The method of claim 2, wherein the uplink signal further comprises CSI comprising at least one of CQI, PMI, RI, PTI, or CRI, wherein the CSI occupies Q resource units, and wherein Q is a positive integer independent of the number of OFDM symbols in the first short slot.

4. A method in a base station supporting low-delay wireless communication, comprising the steps of:

-step a. receiving an uplink signal on a physical layer data channel, the uplink signal occupying part or all of the OFDM symbols of the first short time slot;

the duration of the first short slot is less than 1 millisecond, the first short slot is located in a first LTE subframe in a time domain, the first LTE subframe comprises N short slots, N is a positive integer greater than 1, and the short slot comprises a positive integer of OFDM symbols; the first short time slot is the last short time slot in the N short time slots, and the reference signal in the uplink signal is transmitted on OFDM symbols except the last OFDM symbol in the first LTE subframe; if the first short slot comprises the last OFDM symbol in the first LTE subframe, the number of the OFDM symbols in the first short slot is not less than K; if the last OFDM symbol in the first LTE subframe is not included in the first short time slot, the number of the OFDM symbols in the first short time slot is not less than K-1; k is the minimum value of the number of OFDM symbols in N-1 short time slots except the first short time slot in the N short time slots; the uplink signal includes at least one of uplink data or uplink control signaling.

5. The method of claim 4, wherein step A further comprises the steps of:

-step A0. sending a first signaling indicating a target set of subbands comprising a positive integer number of subbands;

a step a1, sending downlink data, wherein the uplink signal comprises HARQ-ACK information for the downlink data;

6. The method of claim 5, wherein the uplink signal comprises CSI, wherein the CSI comprises at least one of CQI, PMI, RI, PTI, or CRI, wherein the CSI occupies Q resource units, and wherein Q is a positive integer independent of the number of OFDM symbols in the first short slot.

7. A user equipment supporting narrowband communications, the device comprising:

the first module is used for sending an uplink signal on a physical layer data channel, wherein the uplink signal occupies part or all OFDM symbols of a first short time slot;

8. The user equipment of claim 7, wherein:

the first module receives first signaling indicating a target set of subbands that includes a positive integer number of subbands;

further comprising:

a second module: receiving downlink data, wherein the uplink signal comprises HARQ-ACK information aiming at the downlink data;

wherein, the frequency domain resource occupied by the uplink signal belongs to a target sub-band set; the HARQ-ACK information occupies M resource units, wherein M is a positive integer independent of the number of OFDM symbols in the first short time slot.

9. The UE of claim 8, wherein the uplink signal comprises CSI, and wherein the CSI comprises at least one of CQI, PMI, RI, PTI, or CRI, and wherein the CSI occupies Q resource units, and wherein Q is a positive integer independent of the number of OFDM symbols in the first short slot.

10. The UE of claim 7, wherein the first module transmits uplink reference signals distributed over P OFDM symbols in a first short slot, P being a positive integer; the frequency band occupied by the uplink reference signal is the same as the frequency band occupied by the uplink signal in the frequency domain.

11. A base station apparatus supporting narrowband communication, the apparatus comprising:

receiving an uplink signal on a physical layer data channel, wherein the uplink signal occupies part or all of OFDM symbols of a first short time slot;

12. The base station device of claim 11, wherein the first module transmits first signaling and downlink data;

wherein the first signaling indicates a target set of subbands that includes a positive integer number of subbands; the uplink signal comprises HARQ-ACK information aiming at the downlink data; the frequency domain resource occupied by the uplink signal belongs to a target subband set; the HARQ-ACK information occupies M resource units, wherein M is a positive integer independent of the number of OFDM symbols in the first short time slot.

13. The base station device of claim 12, wherein the uplink signal comprises CSI comprising at least one of CQI, PMI, RI, PTI, or CRI, wherein the CSI occupies Q resource units, and wherein Q is a positive integer independent of the number of OFDM symbols in the first short slot.