WO2017059794A1

WO2017059794A1 - Low time delay wireless communication method and apparatus

Info

Publication number: WO2017059794A1
Application number: PCT/CN2016/101240
Authority: WO
Inventors: 张晓博
Original assignee: 上海朗帛通信技术有限公司
Priority date: 2015-10-08
Filing date: 2016-09-30
Publication date: 2017-04-13
Also published as: CN110445595B; CN110445595A; CN106571900A; CN106571900B

Abstract

Disclosed are a low time delay wireless communication method and apparatus. As an embodiment, a UE receives Q1 pieces of type-I data and Q2 pieces of type-II data in step I, and sends first information and second information in step II. The first information indicates whether a type-I transmission block in the Q1 pieces of type-I data is correctly decoded, and the second information indicates whether a type-II transmission block in the Q2 pieces of type-II data is correctly decoded. The type-I transmission block corresponds to a long TTI, and the type-II transmission block corresponds to a short TTI. Before channel coding, the first information corresponds to a first bit sequence, and the second information corresponds to a second bit sequence. After channel coding, at least one bit in the first bit sequence and at least one bit in the second bit sequence correspond to the same output sequence. The present invention can reduce the network time delay, improve the transmission efficiency of a PUCCH, and at the same time maintain the compatibility with the existing LTE devices as far as possible.

Description

Low-latency wireless communication method and device

cross reference

The present application is hereby incorporated by reference in its entirety in its entirety in its entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire all

Technical field

The present invention relates to a transmission scheme in a wireless communication system, and more particularly to a method and apparatus for low latency transmission based on LTE-Long Term Evolution.

Background technique

In the 3rd (3rd Generation Partner Project) RAN (Radio Access Network) #63 plenary meeting, the problem of reducing the delay of the LTE network is discussed. The delay of the LTE network includes air interface delay, signal processing delay, and transmission delay between nodes. With the upgrade of the wireless access network and the core network, the transmission delay is effectively reduced. With the application of new semiconductors with higher processing speeds, signal processing delays are significantly reduced.

In LTE, a TTI (Transmission Time Interval) or a subframe or a Physical Resource Block (PB) corresponds to one ms (milli-second) in time. One LTE subframe includes two LTE slots (Time Slot) - a first slot and a second slot, respectively. The PDCCH (Physical Downlink Control Channel) occupies the first R OFDM (Orthogonal Frequency Division Multiplexing) symbols of the PRB pair, and the R is a positive integer not exceeding 4, and the R is PCFICH (Physical Control Format Indicator Channel) configuration. For FDD (Frequency Division Duplex) LTE, the HARQ (Hybrid Automatic Repeat reQuest) loopback time is 8 ms, and a small number of HARQ retransmissions will bring about tens of ms network delay. Therefore reducing the air gap Late is an effective means to reduce the delay of LTE networks.

The present invention provides a solution to the problem of a long air interface delay in LTE. It should be noted that, in the case of no conflict, the features in the embodiments and embodiments in the UE (User Equipment) of the present application can be applied to the base station, and vice versa. Further, the features of the embodiments and the embodiments of the present application may be combined with each other arbitrarily without conflict.

Summary of the invention

In order to reduce the air interface delay, an intuitive method is to use a short TTI, such as a TTI of 0.5 ms. The inventors found through research that the length of TTI is only a factor of air interface delay, and the delay caused by uplink HARQ-ACK of up to 1 ms also significantly affects air interface delay. Further, the short uplink HARQ-ACK scheme should be as compatible as possible with existing LTE equipment.

The present invention provides a solution to the above problems.

The invention discloses a method for a UE with low delay, comprising the following steps:

- Step A. Receiving Q1 Type I data and Q2 Type II data;

- Step B. Send the first information and the second information.

Wherein the Type I data comprises one or more Type I transport blocks, and the Type II data comprises one or more Type II transport blocks. The first information indicates whether the Type I transport block in the Q1 Type I data is correctly decoded, and the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded. The Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI. The duration of the long TTI is 1 ms (millisecond), and the duration of the short TTI is 0.5 ms. The Q1 is a positive integer and the Q2 is a positive integer. Prior to channel coding, the first information corresponds to a first bit sequence and the second information corresponds to a second bit sequence. After channel coding, at least one of the first bit sequence and at least one of the second bit sequence correspond to the same output sequence.

The essence of the above method is that HARQ-ACK signaling for indicating short TTI and HARQ-ACK signaling for indicating long TTI can be uniformly processed at the time of channel coding, instead of being separately processed. The above method enables HARQ-ACK signaling for indicating short TTI and HARQ-ACK signaling for indicating long TTI It is enough to share PUCCH resources and improve resource utilization.

In the conventional scheme, the PUCCH occupied by the HARQ-ACK bits for the Type I data lasts 1 ms in the time domain, and the duration of the PUCCH occupied by the HARQ-ACK bits for the Type II data in the time domain should be less than 1 ms (in descending Low air port delay). Therefore, another essence of the above method is to transmit HARQ-ACK for a long TTI with a PUCCH having a duration of less than 1 ms, and thus is innovative.

The Type I transport block corresponding to the long TTI means that the Type I transport block is transmitted on an OFDM (Orthogonal Frequency Division Multiplexing) symbol other than the reserved time slice in the long TTI. As an embodiment, the reserved time segment includes an OFDM symbol for a PDCCH (Physical Downlink Control Channel). As an embodiment, the reserved time segment includes a time interval for a GP (Guard Period) and an UpPTS. As an embodiment, the reserved time segment is empty.

The Type II transport block corresponding to the short TTI means that the Type II transport block is transmitted on an OFDM symbol other than the reserved time segment in the short TTI.

As an embodiment, the Type I data and the Type II data are both transmitted on a PDSCH (Physical Downlink Shared Channel).

As an embodiment, the Type I transport block is a transport block in LTE.

As an embodiment, the start time of the long TTI is aligned with the start time of the LTE subframe, that is, the long TTI is an LTE subframe.

As an embodiment, the start time of the short TTI is aligned with the start time of the LTE time slot, that is, the short TTI is an LTE subframe.

As an embodiment, the start time of the long TTI is not aligned with the start time of the LTE subframe, and the long TTI is composed of two short TTIs.

As an embodiment, the first information and the second information are transmitted on a PUCCH (Physical Uplink Control Channel).

As an embodiment, at least two Type I data are present in the Q1 Type I data, and the number of Type I transport blocks included in the two Type I data is different.

As an embodiment, at least two Type II data are present in the Q2 Type II data, and the number of Type II transport blocks in the two Type II data is different.

As an embodiment, the transport block is a MAC (Medium Access Control) PDU (Protocol Data Unit).

As an embodiment, the Q1 Type I data is transmitted in the same long TTI.

Specifically, according to an aspect of the invention, the third input sequence includes a bit in the first bit sequence and a bit in the second bit sequence, and the third input sequence is subjected to channel coding to generate a third output sequence, the Q2 types The II data is transmitted in the first short TTI, and the first information and the second information are transmitted in the second LTE slot.

The advantage of the above aspect is that when the total number of bits in the first bit sequence and the second bit sequence does not exceed 20, it is not necessary to separately allocate separate PUCCH resources for the first information and the second information, thereby saving the overhead of the air interface resource.

As an embodiment, the third input sequence further includes an SR (Scheduling Request) bit.

As an embodiment, the first short TTI is a first LTE time slot, and the second LTE time slot is an L1 LTE time slot after the first LTE time slot, where L1 is a positive integer. As an embodiment of the L1, the L1 is 4.

As an embodiment, the second LTE time slot is the first time slot in the LTE subframe (ie, the previous LTE time slot in the LTE subframe).

As an embodiment, the first bit sequence consists of 1 bit.

As an embodiment, the number of PRBs (Physical Resource Blocks) occupied by the first information and the second information is determined by the number of bits in the third input sequence.

As an embodiment, the sequence of modulation symbols generated by the third output sequence modulation occupies 2 PRBs in the second LTE slot. As a sub-embodiment of the embodiment, the number of bits in the third input sequence is less than 22, and the transmission mode of the modulation symbol sequence generated by the third output sequence modulation in the two PRBs is respectively adopted in the PUCCH format 3 at the first The format in the slot and the format of PUCCH format 3 in the second slot.

As an embodiment, the number of PRBs occupied by the modulation symbol sequence generated by the third output sequence modulation is greater than two, and the number of bits in the third input sequence is greater than 21. As a sub-embodiment of this embodiment, the total number of carriers occupied by the Q1 Type I data and the Q2 Type II data is greater than 5.

Specifically, according to an aspect of the invention, the step B consists of the following steps:

Step B0. Channel coding the first input sequence to generate a first output sequence, the first input sequence comprising bits in the first bit subsequence and bits in the third bit subsequence; channel coding generation of the second input sequence A second output sequence, the second input sequence comprising bits in the second bit subsequence and bits in the fourth bit subsequence.

Step B1. Transmit a modulation symbol corresponding to the first output sequence in the fifth LTE time slot, and transmit a modulation symbol corresponding to the second output sequence in the sixth LTE time slot.

The Q3 Type II data in the Q2 Type II data is transmitted in a third short TTI, and the Q4 Type II data in the Q2 Type II data is transmitted in a fourth short TTI. The first bit sequence consists of bits in the first bit subsequence and bits in the second bit subsequence, the second bit sequence consisting of bits in the third bit subsequence and bits in the fourth bit subsequence. The third bit subsequence indicates whether the Type II transport block in the Q3 Type II data is correctly decoded, and the fourth bit subsequence indicates whether the Type II transport block in the Q4 Type II data is correctly decoded. The first bit subsequence and the second bit subsequence collectively indicate whether the Type I transport block in the Q1 Type I data is correctly decoded. The third short TTI and the fourth short TTI belong to the same long TTI, and the fifth LTE time slot and the sixth LTE time slot belong to one LTE subframe. The sum of the Q3 and the Q4 is equal to the Q2.

As an embodiment, the sum of the Q3 and the Q4 is equal to the Q2.

As an embodiment, the Q3 and the Q4 are equal, and both are equal to the quotient obtained by dividing Q2 by 2.

As an embodiment, the number of bits in the first bit subsequence and the number of bits in the second bit subsequence differ by less than two. The advantage of this embodiment is that the BLER (Block Error Rate) imbalance due to the excessive difference in the number of bits in the first bit subsequence and the second bit subsequence is avoided.

As an embodiment, the number of PRBs occupied by the modulation symbols corresponding to the first output sequence is determined by the number of bits in the first input sequence, and the number of PRBs occupied by the modulation symbols corresponding to the second output sequence is from the second input sequence. The number of bits is determined.

As an embodiment, the modulation symbol corresponding to the first output sequence occupies 2 PRBs in the fifth LTE time slot, and the modulation symbol corresponding to the second output sequence occupies 2 PRBs in the sixth LTE time slot. As a sub-embodiment of the embodiment, the two PRBs in the fifth LTE time slot are consecutive in the frequency domain, and the two PRBs in the fifth LTE time slot and the sixth LTE time slot are in the sixth LTE time slot. The two PRBs make up two PRB pairs (Pair). As still another sub-embodiment of the embodiment, the number of bits in the first input sequence is less than 22, and the transmission mode of the modulation symbol sequence generated by the first output sequence modulation in the two PRBs is respectively adopted in PUCCH format 3 The format in one slot and the format of PUCCH format 3 in the second slot. As still another sub-embodiment of the embodiment, the number of bits in the second input sequence is less than 22, and the transmission mode of the modulation symbol sequence generated by the second output sequence modulation in the two PRBs is respectively adopted by the PUCCH format 3 The format in one slot and the format of PUCCH format 3 in the second slot.

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

Step A0. Receive Q2 downlink signaling, and the Q2 downlink signaling respectively schedule the Q2 Type II data.

As an embodiment, the Q2 downlink signaling includes at least one of {dynamic scheduling signaling, semi-static scheduling signaling}. As an embodiment, the downlink signaling is physical layer signaling. As an embodiment, the downlink signaling is DCI (Downlink Control Information) for downlink scheduling (Grant). As an embodiment, the downlink signaling is one of DCI formats {1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, 2D}.

Specifically, according to the above aspect of the present invention, the step A further includes the following steps:

- Step A1. Receive Q2/2 downlink signaling.

Wherein, one downlink signaling is used to schedule two Type II data, and the two Type II data are respectively transmitted in two short TTIs.

The foregoing aspects save the air interface resources occupied by the downlink signaling.

As an embodiment, the two Type II data are respectively transmitted in two short TTIs, and the two short TTIs constitute one long TTI.

The invention discloses a method for a base station with low delay, comprising the following steps:

- Step A. Send Q1 Type I data and Q2 Type II data;

- Step B. Receiving the first information and the second information.

Wherein the Type I data comprises one or more Type I transport blocks, and the Type II data comprises one or more Type II transport blocks. The first information indicates whether the Type I transport block in the Q1 Type I data is correctly decoded, and the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded. The Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI. The duration of the long TTI is 1 ms, and the duration of the short TTI is 0.5 ms. The Q1 is a positive integer and the Q2 is a positive integer. Prior to channel coding, the first information corresponds to a first bit sequence and the second information corresponds to a second bit sequence. After channel coding, at least one of the first bit sequence and at least one of the second bit sequence correspond to the same output sequence.

As an embodiment, the Q1 Type I data are respectively transmitted in Q1 serving cells, and the Q2 Type II data are respectively transmitted on Q serving cells, the Q1 serving cells and the Q serving cells. There is no public serving cell, and the Q is one of {Q2, Q2/2}.

In the present invention, the serving cell includes at least one carrier.

As an embodiment, the Q1 Type I data are respectively transmitted in Q1 serving cells, and at least one of the Q1 serving cells is deployed in an unlicensed spectrum.

As an embodiment, in the Q1 type I data, at least one start time of the long TTI corresponding to the type I data is aligned with the start time of the LTE subframe, and at least another length corresponding to the type I data exists. The start time of the TTI is not aligned with the start time of the LTE subframe.

As an embodiment, in the Q2 Type II data, at least one start time of the short TTI corresponding to the type II data is aligned with the start time of the LTE time slot, and at least another type II data corresponds to the short time. The start time of the TTI is not aligned with the start time of the LTE slot.

Specifically, according to an aspect of the invention, the third input sequence includes the first bit sequence a bit in the second bit sequence and a second bit sequence, the third input sequence is channel encoded to generate a third output sequence, the Q2 Type II data being transmitted in the first short TTI, the first information and the second information being in the second Transmission in LTE time slots.

As an embodiment, the first short TTI is a first LTE time slot, and the second LTE time slot is an L1 LTE time slot after the first LTE time slot, where L1 is a positive integer.

Specifically, according to an aspect of the invention, the step B includes the following steps:

Step B0. Receive a modulation symbol corresponding to the first output sequence in the fifth LTE time slot, and receive a modulation symbol corresponding to the second output sequence in the sixth LTE time slot;

Step B1. Channel decoding the first output sequence to generate a first input sequence, the first input sequence comprising bits in the first bit subsequence and bits in the third bit subsequence; channel translating the second output sequence The code generates a second input sequence that includes bits in the second bit subsequence and bits in the fourth bit subsequence.

- Step A0. Send Q2 downlink signaling, the Q2 downlink signaling respectively scheduling the Q2 Type II data.

- Step A1. Send Q2/2 downlink signaling.

The invention discloses a user equipment for low delay, which comprises the following modules:

The first module is configured to receive Q1 Type I data and Q2 Type II data;

The second module is configured to send the first information and the second information.

As an embodiment of the foregoing user equipment, the first module is further configured to receive Q2/2 downlink signaling. Wherein, one downlink signaling is used to schedule two Type II data, and the two Type II data are respectively transmitted in two short TTIs.

As an embodiment of the user equipment, the first module is further configured to receive Q2 downlink signaling, where the Q2 downlink signaling respectively schedule the Q2 Type II data.

As an embodiment of the user equipment, the second module is further configured to:

- channel coding the first input sequence to generate a first output sequence, the first input sequence comprising bits in the first bit subsequence and bits in the third bit subsequence; channel coding the second input sequence to generate a second An output sequence, the second input sequence comprising bits in the second bit subsequence and bits in the fourth bit subsequence;

Transmitting a modulation symbol corresponding to the first output sequence in a fifth LTE time slot, and transmitting a modulation symbol corresponding to the second output sequence in a sixth LTE time slot.

Wherein the Q3 Type II data in the Q2 Type II data is transmitted in the third short TTI The Q4 Type II data in the Q2 Type II data is transmitted in the fourth short TTI. The first bit sequence consists of bits in the first bit subsequence and bits in the second bit subsequence, the second bit sequence consisting of bits in the third bit subsequence and bits in the fourth bit subsequence. The third bit subsequence indicates whether the Type II transport block in the Q3 Type II data is correctly decoded, and the fourth bit subsequence indicates whether the Type II transport block in the Q4 Type II data is correctly decoded. The first bit subsequence and the second bit subsequence collectively indicate whether the Type I transport block in the Q1 Type I data is correctly decoded. The third short TTI and the fourth short TTI belong to the same long TTI, and the fifth LTE time slot and the sixth LTE time slot belong to one LTE subframe. The sum of the Q3 and the Q4 is equal to the Q2.

The invention discloses a base station device for low delay, which comprises the following modules:

a first module, configured to send Q1 Type I data and Q2 Type II data;

The second module is configured to receive the first information and the second information.

As an embodiment of the foregoing base station device, the second module is further configured to:

Receiving, in a fifth LTE time slot, a modulation symbol corresponding to the first output sequence, and receiving, in the sixth LTE time slot, a modulation symbol corresponding to the second output sequence;

Channel decoding the first output sequence to generate a first input sequence, the first input sequence comprising bits in the first bit subsequence and bits in the third bit subsequence; channel decoding the second output sequence a second input sequence comprising a bit sum in the second bit subsequence The bits in the fourth bit subsequence.

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

-. Reduce the air interface delay caused by PUCCH;

- HARQ-ACK for short TTI and HARQ-ACK for long TTI can be transmitted in the same PUCCH, improving spectrum utilization efficiency.

DRAWINGS

Other features, objects, and advantages of the present invention will become more apparent from the Detailed Description of Description

1 shows a flow chart of uplink HARQ-ACK transmission in accordance with one embodiment of the present invention;

2 is a schematic diagram showing transmission of first information and second information on the same LTE time slot according to an embodiment of the present invention;

3 shows a schematic diagram of first information transmitted on two LTE time slots in accordance with an embodiment of the present invention;

4 shows a schematic diagram of a long TTI being a drift TTI, in accordance with one embodiment of the present invention;

Figure 5 illustrates the inclusion of multiple Type I data on a carrier in accordance with one embodiment of the present invention. Schematic diagram

Figure 6 shows a schematic diagram of channel coding in accordance with one embodiment of the present invention;

FIG. 7 is a block diagram showing the structure of a processing device in a UE according to an embodiment of the present invention;

FIG. 8 is a block diagram showing the structure 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 below with reference to the accompanying drawings. It should be noted that the features of the embodiments and the embodiments of the present application may be combined with each other without conflict.

Example 1

Embodiment 1 illustrates an uplink HARQ-ACK transmission as shown in FIG. In Figure 1, base station N1 is the maintenance base station of the serving cell of UE U2, and the step identified in block F1 is an optional step.

For the base station N1, Q downlink signaling is transmitted in step S10, Q1 type I data and Q2 type II data are transmitted in step S11, and the first information and the second information are received in step S12.

For UE U2, Q downlink signaling is received in step S20, Q1 Type I data and Q2 Type II data are received in step S21, and the first information and the second information are transmitted in step S22.

In Embodiment 1, the Q downlink signaling schedules the Q2 Type II data, the Type I data includes one or more Type I transport blocks, and the Type II data includes one or more Type II transport blocks. . The first information indicates whether the Type I transport block in the Q1 Type I data is correctly decoded, and the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded. The Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI. The duration of the long TTI is 1 ms, and the duration of the short TTI is 0.5 ms. The Q1 is a positive integer and the Q2 is a positive integer. Prior to channel coding, the first information corresponds to a first bit sequence and the second information corresponds to a second bit sequence. After channel coding, at least one of the first bit sequence and at least one of the second bit sequence correspond to the same output sequence. The Q is Q2 or Q2/2.

As a sub-embodiment 1 of Embodiment 1, the Q is Q2, and the Q downlink signaling respectively schedules the Q2 Type II data.

As a sub-embodiment 2 of Embodiment 1, the Q is Q2/2, one downlink signaling is scheduled for two Type II data, and the two Type II data are respectively located in the same serving cell. Transfer in two short TTIs.

As a sub-embodiment 3 of the first embodiment, the Q downlink signalings are respectively Q DCIs for downlink scheduling.

As a sub-embodiment 5 of Embodiment 1, the transmitting the first information and the second information refers to transmitting a modulation symbol sequence, and the receiving the first information and the second information refers to receiving a modulation symbol sequence. The sequence of modulation symbols is modulated by an output bit sequence that is generated by channel coding of the input sequence. The input sequence includes {bits in the first bit sequence, bits in the second bit sequence}.

Example 2

Embodiment 2 illustrates a schematic diagram of transmission of first information and second information on the same LTE time slot, as shown in FIG. In Figure 2, the CC identifies the carrier (Component Carrier), the slash-filled square identifies the carrier and time interval occupied by the type I data, and the back-tilt-filled square identifies the carrier and time interval occupied by the type II data. The line-filled square identifies the carrier and time interval used to transmit the first information and the second information.

In the second embodiment, the base station sends Q1 Type I data and Q2 Type II data to the UE, and the UE sends the first information and the second information to the base station in the second LTE time slot on the given carrier.

The Q1 type I data are respectively transmitted on the Q1 serving cells, that is, the carriers of the serving cell corresponding to the type I data #0 to the type I data #(Q1-1) are CC#0 to CC# respectively. Q1-1). The Q2 Type II data are respectively transmitted on the Q2 serving cells, that is, the carriers of the serving cell corresponding to the Type II data #0 to the Type II data #(Q2-1) are respectively CC#Q1 to CC# (Q1+) Q2-1). The Q1 Type I data is transmitted in the same long TTI, and the Q2 Type II data is transmitted in the first short TTI. The Type I data includes one or more Type I transport blocks, and the Type II data includes one or more Type II transport blocks. The first information indicates whether the Type I transport block in the Q1 Type I data is correctly decoded, and the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded. The duration of the long TTI is 1 ms, and the duration of the short TTI is 0.5 ms. The Q1 is a positive integer, and the Q2 is a positive integer number. Prior to channel coding, the first information corresponds to a first bit sequence and the second information corresponds to a second bit sequence. After the channel coding, the first bit sequence and the second bit sequence correspond to the same output sequence, that is, the output sequence is obtained by channel coding the input sequence, and the input sequence includes the first bit sequence and the second bit sequence. .

As a sub-embodiment 1 of Embodiment 2, the sum of the number of bits in the first bit sequence and the number of bits in the second bit sequence is less than 21, and the first information and the second information are transmitted on the PUCCH format 3.

As the second embodiment of the second embodiment, the long TTI corresponds to an LTE subframe, the short TTI corresponds to an LTE time slot, and the long TTI occupied by the Q1 type I data is a first subframe, The subframe to which the short TTI occupied by the Q2 Type II data belongs is the second subframe, and the subframe to which the LTE slot occupied by the first information and the second information belongs is the third subframe, and the third subframe is the first subframe. The fourth subframe after the subframe, the third subframe is the Lth subframe after the second subframe, and the L is less than 4.

As a sub-embodiment 3 of the second embodiment, the input sequence further includes an SR (Scheduling Request) bit.

As the sub-embodiment 4 of the second embodiment, the channel coding is RM (Reed-Muller) coding adopted by the LTE PUCCH format 3, and the number of bits in the input sequence does not exceed 22, in the output sequence The number of bits is 48.

As a sub-embodiment 5 of the second embodiment, the given carrier is an uplink carrier, or a TDD (Time Duplex Division) carrier, or a carrier deployed in an unlicensed spectrum.

Example 3

Embodiment 3 illustrates a schematic diagram of transmission of first information on two LTE time slots, as shown in FIG. In Figure 3, the CC identifies the carrier, the slash-filled square identifies the carrier and time interval occupied by the type I data, and the back-tilt-filled square identifies the carrier and time interval occupied by the type II data, and the black-point filled square The cell identifies the carrier and time interval used to transmit the first output sequence, and the vertical line filled cell identifies the carrier and time interval used to transmit the second output sequence.

The base station first transmits Q1 Type I data and Q2 Type II data; then receives a modulation symbol modulated by the first output sequence in a fifth LTE time slot on a given carrier, on a given carrier Receiving a modulation symbol modulated by the second output sequence in a sixth LTE time slot; finally performing channel decoding on the first output sequence to generate a first input sequence and channel decoding the second output sequence to generate a second input sequence .

The UE first receives Q1 Type I data and Q2 Type II data; then performs channel coding on the first input sequence to generate a first output sequence and channel coding the second input sequence to generate a second output sequence; finally, in the fifth LTE A modulation symbol modulated by the first output sequence is transmitted in the slot, and a modulation symbol modulated by the second output sequence is transmitted in the sixth LTE slot.

In Embodiment 3, the first input sequence includes bits in the first bit subsequence and bits in the third bit subsequence, and the second input sequence includes bits in the second bit subsequence and bits in the fourth bit subsequence .

In Embodiment 3, the Q1 Type I data are respectively transmitted in the same long TTI on the Q1 serving cells, that is, the carrier of the serving cell corresponding to Type I data #0 to Type I Data #(Q1-1) They are CC#0 to CC# (Q1-1). The Q2 Type II data are respectively transmitted on Q2/2 serving cells, that is, Type II data {#0, #2, #4, ..., #(Q2-2)} are respectively in CC#Q1 to CC# ( The third short TTI transmission on Q1+Q2/2-1), type II data {#1, #3, #5,...,#(Q2-1)} in CC#Q1 to CC# (Q1+Q2 respectively) /2-1) Transmission on the fourth short TTI.

In Embodiment 3, the Type I data includes one or more Type I transport blocks, and the Type II data includes one or more Type II transport blocks. The first information indicates whether the Type I transport block in the Q1 Type I data is correctly decoded, and the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded. The duration of the long TTI is 1 ms, and the duration of the short TTI is 0.5 ms. The Q1 is a positive integer and the Q2 is a positive integer. Prior to channel coding, the first information corresponds to a first bit sequence and the second information corresponds to a second bit sequence.

In Embodiment 3, the first bit sequence is composed of bits in the first bit subsequence and bits in the second bit subsequence, and the second bit sequence is from bits in the third bit subsequence and in the fourth bit subsequence Bit composition. The third bit subsequence indicates whether the Type II transport block in Type II data {#0, #2, #4, ..., #(Q2-2)} is correctly decoded, and the fourth bit subsequence indicates Type II data { Whether the Type II transport block in #1, #3, #5, ..., #(Q2-1)} is correctly decoded. The first bit subsequence and the second bit subsequence jointly indicate whether the Type I transport block in the Q1 Type I data is positive Definitely decoded. The third short TTI and the fourth short TTI belong to the same long TTI, and the fifth LTE time slot and the sixth LTE time slot belong to one LTE subframe.

As a sub-embodiment 1 of Embodiment 3, at least one of the {first input sequence, the second input sequence} further includes an SR (Scheduling Request) bit.

As a sub-embodiment 2 of Embodiment 3, the first input sequence includes a bit sequence concatenated by the first bit subsequence and the third bit subsequence, and the second input sequence includes the second bit subsequence and the fourth bit A sequence of bits in which subsequences are concatenated.

As a sub-embodiment 3 of Embodiment 3, the number of bits in the first bit subsequence and the second bit subsequence are equal, or the number of bits in the first bit subsequence and the second bit subsequence is different by one.

As a sub-embodiment 4 of the embodiment 3, the Q1 type I data includes a total of M1 Type I transport blocks, and each of the Type I data includes 1 or 2 Type I transport blocks. The first bit sequence includes M1 bits, where each bit indicates whether a Type I transport block is correctly decoded. The M1 is greater than or equal to Q1 and less than or equal to 2 times Q1. As a sub-embodiment of the sub-embodiment 4 of the embodiment 3, the M1 is less than or equal to 20.

As a sub-embodiment 5 of the embodiment 3, the Q2 Type II data includes a total of M2 Type II transport blocks, and each of the Type II data includes 1 or 2 Type II transport blocks. The second bit sequence includes M2 bits, where each bit indicates whether a Type II transport block is correctly decoded. The M2 is greater than or equal to Q2 and less than or equal to 2 times Q2. As a sub-embodiment of the sub-embodiment 5 of the embodiment 3, the M2 is less than or equal to 20.

As a sub-embodiment 6 of the embodiment 3, the Q1 type I data includes a total of M3 Type I transport blocks, and each of the Type I data includes 1 or 2 Type I transport blocks. The first bit sequence includes Q1 bits, and the Q1 bits respectively indicate whether all Type I transport blocks in the Q1 Type I data are correctly decoded (ie, if there is a Type I transport block in a Type I data) Failed to be decoded correctly, the corresponding bit is indicated as NACK). The M3 is greater than or equal to Q1 and less than or equal to 2 times Q1. As a sub-embodiment of the sub-embodiment 6 of the third embodiment, the M3 is greater than 20.

As sub-embodiment 7 of the embodiment 3, the Q2 Type II data includes a total of M4 Type II transport blocks, and each of the Type II data includes 1 or 2 Type II transport blocks. The second bit sequence includes Q2 bits, which respectively indicate whether Type II transport blocks in the Q2 Type II data are all correctly decoded. The M4 is greater than or equal to Q2 and less than or equal to 2 times Q2. As a sub-embodiment of the sub-embodiment 7 of the third embodiment, the M4 is greater than 20.

As a sub-embodiment 8 of the embodiment 3, the first bit sequence is formed by concatenating the first bit subsequence and the second bit subsequence, and the second bit sequence is composed of the third bit subsequence and the fourth bit subsequence level. Made together.

Example 4

Embodiment 4 illustrates a schematic diagram in which the long TTI is a floating TTI, as shown in FIG. In Figure 4, the CC identifies the carrier, and the slash-filled square identifies the carrier and time interval occupied by the Type I data.

In the embodiment 4, the Q1 type I data in the present invention are respectively transmitted on the Q1 serving cells, that is, the carriers of the serving cell corresponding to the type I data #0 to the type I data #(Q1-1) are respectively CC#0 to CC# (Q1-1). The type I data #0 is transmitted in an LTE subframe, and the long TTI occupied by the type I data #(Q1-1) is a drift TTI, that is, the long TTI occupied by the type I data #(Q1-1). The start time is not aligned with the start time of the LTE subframe.

As a sub-embodiment 1 of Embodiment 4, CC# (Q1-1) is deployed in an unlicensed spectrum.

Example 5

Embodiment 5 exemplifies a schematic diagram including a plurality of Type I data on one carrier, as shown in FIG. In Figure 5, the CC identifies the carrier, and the slash-filled square identifies the carrier and time interval occupied by the Type I data.

In Embodiment 5, the Q1 Type I data in the present invention occupies a total of Q1-1 serving cells for transmission. The type I data {#1, #2} is transmitted on CC#1.

As sub-embodiment 1 of the embodiment 5, CC#1 is a TDD carrier.

Example 6

Embodiment 6 exemplifies a schematic diagram of channel coding, as shown in FIG. In Figure 6, the bit sequence b ₀ b ₁ ... b _t-1 is the input sequence of the channel coding, the bit sequence

Is the output sequence of the channel coding.

As a sub-embodiment 1 of Embodiment 6, the channel coding in FIG. 6 adopts channel coding of PUCCH format 3 in LTE, that is, RM coding is used, and after puncturing, the total output bit is 48 bits, that is, the above subscript r is 47. .

As a sub-embodiment 2 of Embodiment 6, the channel coding employs convolutional coding.

As sub-embodiment 3 of Embodiment 6, b ₀ b ₁ ... b _t-1 includes bits in the first bit sequence and bits in the second bit sequence in the present invention.

Is the third output sequence in the present invention.

As a sub-embodiment 4 of Embodiment 6, b ₀ b ₁ ... b _t-1 respectively correspond to the first input sequence and the second input sequence in the present invention, and correspondingly,

Corresponding to the first output sequence and the second output sequence in the present invention, respectively.

Example 7

Embodiment 7 exemplifies a structural block diagram of a processing device in a UE, as shown in FIG. In FIG. 7, the UE processing apparatus 200 is mainly composed of a receiving module 201 and a transmitting module 202.

The receiving module 201 is configured to receive Q1 Type I data and Q2 Type II data. The sending module 202 is configured to send the first information and the second information.

In Embodiment 7, the Type I data includes one or more Type I transport blocks, and the Type II data includes one or more Type II transport blocks. The first information indicates whether the Type I transport block in the Q1 Type I data is correctly decoded, and the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded. The Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI. The duration of the long TTI is 1 ms, and the duration of the short TTI is 0.5 ms. The Q1 is a positive integer and the Q2 is a positive integer. Prior to channel coding, the first information corresponds to a first bit sequence and the second information corresponds to a second bit sequence. After channel coding, at least one of the first bit sequence and at least one of the second bit sequence correspond to the same output sequence.

In Embodiment 7, the number of bits in the first bit sequence is equal to the number of Type I transport blocks in the Q1 Type I data, wherein each bit indicates whether 1 Type I transport block is correctly decoded, and second The number of bits in the bit sequence is equal to the number of Type II transport blocks in the Q2 Type II data A number in which each bit indicates whether a Type II transport block is correctly decoded.

As a sub-embodiment 1 of the embodiment 7, the receiving module 201 is also used for one of the following:

Receiving Q2 downlink signaling, where the Q2 downlink signaling respectively schedules the Q2 Type II data;

- Receive Q2/2 downlink signaling. Wherein, one downlink signaling is used to schedule two Type II data, and the two Type II data are respectively transmitted in two short TTIs.

Example 8

Embodiment 8 exemplifies a structural block diagram of a processing device in a base station, as shown in FIG. In FIG. 8, the base station processing apparatus 300 is mainly composed of a transmitting module 301 and a receiving module 302.

The sending module 301 is configured to send Q1 Type I data and Q2 Type II data on the PDSCH, and the receiving module 302 is configured to receive the first information and the second information on the PUCCH.

In Embodiment 8, the Type I data includes one or more Type I transport blocks, and the Type II data includes one or more Type II transport blocks. The first information indicates whether the Type I transport block in the Q1 Type I data is correctly decoded, and the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded. The Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI. The duration of the long TTI is 1 ms, and the duration of the short TTI is 0.5 ms. The Q1 is a positive integer and the Q2 is a positive integer. Prior to channel coding, the first information corresponds to a first bit sequence and the second information corresponds to a second bit sequence. After channel coding, at least one of the first bit sequence and at least one of the second bit sequence correspond to the same output sequence.

As a sub-embodiment 1 of Embodiment 8, the detailed steps of receiving the first information and the second information on the PUCCH include:

Channel decoding the first output sequence to generate a first input sequence, the first input sequence comprising bits in the first bit subsequence and bits in the third bit subsequence; channel decoding the second output sequence A second input sequence comprising bits in the second bit subsequence and bits in the fourth bit subsequence.

The Q3 Type II data in the Q2 Type II data is transmitted in a third short TTI, and the Q3 Type II data in the Q2 Type II data is transmitted in a fourth short TTI. The first bit sequence consists of bits in the first bit subsequence and bits in the second bit subsequence, the second bit sequence consisting of bits in the third bit subsequence and bits in the fourth bit subsequence. The third bit subsequence indicates whether the Type II transport block in the Q3 Type II data is correctly decoded, and the fourth bit subsequence indicates whether the Type II transport block in the Q3 Type II data is correctly decoded. The first bit subsequence and the second bit subsequence collectively indicate whether the Type I transport block in the Q1 Type I data is correctly decoded. The third short TTI and the fourth short TTI belong to the same long TTI, and the fifth LTE time slot and the sixth LTE time slot belong to one LTE subframe. The Q3 is the quotient of the Q2 divided by two.

As a sub-embodiment 2 of Embodiment 8, the Type I transport block and the Type II transport block are both MAC PDUs.

One of ordinary skill in the art can appreciate that all or part of the above steps can be completed by a program to instruct related hardware, and the program can 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 also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiment may be implemented in hardware form or in the form of a software function module. The application is not limited to any specific combination of software and hardware. The UE or the mobile terminal in the present invention includes, but is not limited to, a wireless communication device such as a mobile phone, a tablet computer, a notebook, an internet card, an in-vehicle communication device, and a wireless sensor. The base station in the present invention includes, but is not limited to, a macro communication base station, a micro cell base station, a home base station, a relay base station, and the like.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

A method for UE in low latency includes the following steps:

- Step A. Receiving Q1 Type I data and Q2 Type II data;

- step B. transmitting the first information and the second information;

The type I data includes one or more type I transport blocks, and the type II data includes one or more type II transport blocks; the first information indicates whether the type I transport block in the Q1 type I data is Correctly decoded, the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded; the Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI; the duration of the Long TTI The time is 1 ms, the duration of the short TTI is 0.5 ms; the Q1 is a positive integer, and the Q2 is a positive integer; before the channel coding, the first information corresponds to the first bit sequence, and the second information corresponds to the second bit sequence; After channel coding, at least one of the first bit sequence and at least one of the second bit sequence correspond to the same output sequence.
The method of claim 1 wherein said step A further comprises the step of:

Step A0. Receive Q2 downlink signaling, and the Q2 downlink signaling respectively schedule the Q2 Type II data.
The method of claim 1 wherein the third input sequence comprises bits in the first bit sequence and bits in the second bit sequence, the third input sequence being channel encoded to generate a third output sequence, the Q2 Type II The data is transmitted in a first short TTI, and the first information and the second information are transmitted in a second LTE slot.
The method of claim 3 wherein said step A further comprises the step of:

Step A0. Receive Q2 downlink signaling, and the Q2 downlink signaling respectively schedule the Q2 Type II data.
The method of claim 1 wherein said step B comprises the steps of:

Step B0. Channel coding the first input sequence to generate a first output sequence, the first input sequence comprising bits in the first bit subsequence and bits in the third bit subsequence; channel coding generation of the second input sequence a second output sequence, the second input sequence comprising bits in the second bit subsequence and bits in the fourth bit subsequence;

Step B1: transmitting a modulation symbol corresponding to the first output sequence in the fifth LTE time slot, and transmitting a modulation symbol corresponding to the second output sequence in the sixth LTE time slot;

The Q3 Type II data in the Q2 Type II data is transmitted in a third short TTI, and the Q4 Type II data in the Q2 Type II data is transmitted in a fourth short TTI; the first bit sequence Composed of bits in the first bit subsequence and bits in the second bit subsequence, the second bit sequence consisting of bits in the third bit subsequence and bits in the fourth bit subsequence; third bit subsequence indication Whether the Type II transport block in the Q3 Type II data is correctly decoded, and the fourth bit subsequence indicates whether the Type II transport block in the Q4 Type II data is correctly decoded; the first bit subsequence and The second bit subsequence jointly indicates whether the Type I transport block in the Q1 Type I data is correctly decoded; the third short TTI and the fourth short TTI belong to the same long TTI, the fifth LTE slot and the sixth LTE The time slot belongs to one LTE subframe; the sum of the Q3 and the Q4 is equal to the Q2.
The method according to any one of claims 1 to 5, wherein said step A further comprises the steps of:

- Step A1. Receiving Q2/2 downlink signaling;

One of the downlink signalings schedules two Type II data, and the two Type II data are respectively transmitted in two short TTIs.
A method for a base station for low latency, comprising the steps of:

- Step A. Send Q1 Type I data and Q2 Type II data;

- step B. receiving the first information and the second information;

The type I data includes one or more type I transport blocks, and the type II data includes one or more type II transport blocks; the first information indicates whether the type I transport block in the Q1 type I data is Correctly decoded, the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded; the Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI. The duration of the long TTI is 1 ms, and the duration of the short TTI is 0.5 ms; The Q1 is a positive integer, and the Q2 is a positive integer; before channel coding, the first information corresponds to the first bit sequence, the second information corresponds to the second bit sequence; after channel coding, at least 1 bit in the first bit sequence And at least one bit in the second bit sequence corresponds to the same output sequence.
The method of claim 7 wherein said step A further comprises the step of:

- Step A0. Send Q2 downlink signaling, the Q2 downlink signaling respectively scheduling the Q2 Type II data.
The method of claim 7 wherein the third input sequence comprises bits in the first bit sequence and bits in the second bit sequence, the third input sequence being channel encoded to generate a third output sequence, the Q2 Type II The data is transmitted in a first short TTI, and the first information and the second information are transmitted in a second LTE slot.
The method of claim 9 wherein said step A further comprises the step of:

- Step A0. Send Q2 downlink signaling, the Q2 downlink signaling respectively scheduling the Q2 Type II data.
The method of claim 7 wherein said step B consists of the following steps:

Step B0. Receive a modulation symbol corresponding to the first output sequence in the fifth LTE time slot, and receive a modulation symbol corresponding to the second output sequence in the sixth LTE time slot;

Step B1. Channel decoding the first output sequence to generate a first input sequence, the first input sequence comprising bits in the first bit subsequence and bits in the third bit subsequence; channel translating the second output sequence The code generates a second input sequence, the second input sequence comprising bits in the second bit subsequence and bits in the fourth bit subsequence;

The Q3 Type II data in the Q2 Type II data is transmitted in a third short TTI, and the Q4 Type II data in the Q2 Type II data is transmitted in a fourth short TTI; the first bit sequence Composed of bits in the first bit subsequence and bits in the second bit subsequence, the second bit sequence consisting of bits in the third bit subsequence and bits in the fourth bit subsequence; third bit subsequence indication Whether the Type II transport block in the Q3 Type II data is correctly decoded, and the fourth bit subsequence indicates whether the Type II transport block in the Q4 Type II data is correctly decoded; the first bit subsequence and The second bit subsequence collectively indicates the class in the Q1 type I data Whether the Type I transport block is correctly decoded; the third short TTI and the fourth short TTI belong to the same long TTI, and the fifth LTE time slot and the sixth LTE time slot belong to one LTE subframe. The sum of the Q3 and the Q4 is equal to the Q2.
The method according to any one of claims 7 to 11, wherein said step A further comprises the steps of:

- Step A1. Send Q2/2 downlink signaling;

Wherein, one downlink signaling is used to schedule two Type II data, and the two Type II data are respectively transmitted in two short TTIs.
A user equipment that is used for low latency, including the following modules:

a first module, configured to receive Q1 Type I data and Q2 Type II data;

a second module, configured to send the first information and the second information;

The type I data includes one or more type I transport blocks, and the type II data includes one or more type II transport blocks; the first information indicates whether the type I transport block in the Q1 type I data is Correctly decoded, the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded; the Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI; the duration of the Long TTI The time is 1 ms, and the duration of the short TTI is 0.5 ms. The Q1 is a positive integer, and the Q2 is a positive integer; before channel coding, the first information corresponds to the first bit sequence, the second information corresponds to the second bit sequence; after channel coding, at least 1 bit in the first bit sequence And at least one bit in the second bit sequence corresponds to the same output sequence.
A base station device used for low latency, including the following modules:

The first module is configured to send Q1 type I data and Q2 type II data

The second module is configured to receive the first information and the second information.

The type I data includes one or more type I transport blocks, and the type II data includes one or more type II transport blocks; the first information indicates whether the type I transport block in the Q1 type I data is Correctly decoded, the second information indicates whether the Type II transport block in the Q2 Type II data is correctly decoded; the Type I transport block corresponds to a long TTI, and the Type II transport block corresponds to a short TTI; the duration of the Long TTI The time is 1 ms, and the duration of the short TTI is 0.5 ms; The Q1 is a positive integer, and the Q2 is a positive integer; before channel coding, the first information corresponds to the first bit sequence, the second information corresponds to the second bit sequence; after channel coding, at least 1 bit in the first bit sequence And at least one bit in the second bit sequence corresponds to the same output sequence.