CN110545585A

CN110545585A - Method and device in wireless communication

Info

Publication number: CN110545585A
Application number: CN201910929996.7A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2016-07-28
Filing date: 2016-07-28
Publication date: 2019-12-06
Anticipated expiration: 2036-07-28
Also published as: CN110545585B; CN107666377A; CN107666377B

Abstract

The invention discloses a method and a device in wireless communication. The UE firstly receives a first signaling set; the first wireless signal is then operated. Wherein the first wireless signal occupies a target time interval, the target time interval being one of L time intervals less than 1 millisecond. The first signaling set comprises P downlink signaling. The frequency domain resources occupied by the first wireless signal are first frequency domain resources. The first set of signaling is used to determine second frequency domain resources. { the first signaling set, the position of the target time interval in the L time intervals }, is used to determine a mapping of the second frequency-domain resources to the first frequency-domain resources. The invention provides frequency diversity gain for wireless signals supporting transmission at time intervals less than 1 millisecond and improves transmission performance.

Description

Method and device in wireless communication

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

Application date of the original application: 2016 (7 months) and 28 days

- -application number of the original application: 201610602967.6

the invention of the original application is named: method and device in wireless communication

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 Long Term Evolution (LTE-Long Term Evolution).

Background

The subject of reducing the delay of the LTE Network is determined 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 RAN #72 global session, based on the previous research results, 3GPP decided to standardize the shortened TTI (Transmission Time Interval) and the signal processing delay.

In the existing LTE system, one TTI or subframe or prb (physical Resource block) Pair (Pair) corresponds to 1ms (milli-second) in time. To reduce network delay, 3GPP decides to standardize shorter TTIs, such as introducing a downlink TTI length of 2 OFDM (Orthogonal Frequency Division Multiplexing) symbols or 1 slot (TS) and an uplink TTI length of 2 OFDM symbols, 4 OFDM symbols or 1 slot in an LTE FDD (Frequency Division duplex) system. A TTI length of 1 slot is introduced in uplink and downlink of an LTE TDD (Time Division duplex) system.

LTE is a broadband wireless communication system, and the frequency responses of different frequencies within its transmission bandwidth may have large differences, so that frequency-stepped gain can be obtained by distributing the transmission of a wireless signal over multiple frequency bands within the transmission bandwidth, thereby improving the link performance of the transmission. In the existing LTE system, a typical use case is mapping from a Virtual Resource Block (VRB) used for downlink Resource allocation to a Physical Resource Block (PRB) and Frequency Hopping (FH) used for uplink Resource allocation.

Disclosure of Invention

in the LTE system, the existing mapping or frequency hopping from virtual resource blocks to physical resource blocks is performed in a time slot (timeslot) as a minimum unit, i.e., the mapping or frequency hopping operation is performed on a time slot basis. After a short TTI, for example, a short TTI 2 OFDM symbols long, if the existing mapping or frequency hopping design from the virtual resource block to the physical resource is performed in the minimum unit of the slot, the frequency diversity gain of the wireless transmission based on the short TTI cannot be obtained, which results in the degradation of the link performance of the transmission.

The invention provides a solution for solving the problem that the LTE system can not obtain frequency diversity gain in the uplink and downlink resource allocation process after the short TTI is introduced. 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.

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

-step a. receiving a first set of signalling

-step b.

The time domain resource occupied by the first wireless signal belongs to a target time interval, the target time interval is one of L time intervals, L is a positive integer greater than 1, and the time length of any one of the L time intervals is less than 1 millisecond. The first signaling set comprises P downlink signaling, and P is a positive integer. The frequency domain resources occupied by the first wireless signal are first frequency domain resources. The first set of signaling is used to determine second frequency domain resources. { the first signaling set, the position of the target time interval in the L time intervals }, is used to determine a mapping of the second frequency-domain resources to the first frequency-domain resources. The first frequency resource and the second frequency resource belong to different time intervals. The operation is transmitting or the operation is receiving. The first wireless signal carries a first bit block comprising a positive integer number of bits, the first bit block transmitted in the target interval of the L time intervals.

As an embodiment, the method may flexibly configure and switch mapping or frequency hopping of virtual resource blocks to physical resource blocks of a wireless signal transmitted in a time interval less than 1 millisecond according to a time length of the target interval, a position of the target interval in the L time intervals, and the first signaling set, and obtain a frequency diversity gain.

As an example, P is 2.

as an example, P is 1.

As an embodiment, the downlink signaling is physical layer signaling.

As an embodiment, the P downlink signaling includes at least one physical layer signaling and one higher layer signaling.

As a sub-embodiment of the two embodiments, the physical layer signaling is DCI (Downlink Control information).

As an embodiment, the number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain resource.

As an embodiment, the bandwidth occupied by the second frequency domain resource and the bandwidth occupied by the first frequency domain resource are equal.

As an embodiment, a starting time of the time domain resource occupied by the first wireless signal is a starting time of the target time interval.

As an embodiment, the time domain resource occupied by the first wireless signal is the target time interval.

As an embodiment, the number of subcarriers included in the second frequency resource is different from the number of subcarriers included in the first frequency resource.

As an embodiment, the duration of at least two of the L time intervals is different.

As an embodiment, a duration of any one of the L time intervals is less than 1 millisecond.

as an embodiment, any one of the L time intervals includes R time-domain consecutive OFDM symbols, the OFDM symbols include cyclic prefixes, the R is a positive integer, and the L time intervals are consecutive.

In one embodiment, at least two of the L time intervals are discontinuous.

as an embodiment, any two time intervals of the L time intervals are discontinuous.

as an embodiment, the first frequency-domain resources are contiguous in the frequency domain.

as an embodiment, the second frequency domain resources are continuous or discrete in the frequency domain.

As an embodiment, the duration of the L time intervals is the same.

As an embodiment, the time domain resource occupied by the first wireless signal is a part of the target time interval.

As one embodiment, the first frequency-domain resource includes Q frequency-domain consecutive subcarriers, Q being a positive integer. As a sub-embodiment, Q is a multiple of 12.

As an embodiment, the first frequency domain Resource is aligned with F Physical Resource Blocks (PRBs) in the frequency domain, where F is a positive integer greater than or equal to 1.

As an embodiment, the time length of any one of the L inter intervals is one of {2 OFDM symbols, 4 OFDM symbols, and 7 OFDM symbols }.

As an embodiment, the operation is sending, and the transmission Channel corresponding to the first wireless signal is an Uplink Shared Channel (UL-SCH) mapped in the target time interval.

As an embodiment, the operation is receiving, and the transmission Channel corresponding to the first wireless signal is a Downlink Shared Channel (DL-SCH) mapped in the target time interval.

As an embodiment, the first radio signal is an output of the first bit block after Channel Coding (Channel Coding), Modulation Mapper (Modulation Mapper), Layer Mapper (Layer Mapper), Precoding (Precoding), Resource Element Mapper (Resource Element Mapper), and OFDM signal Generation (Generation) in sequence. As a sub-embodiment, the first bit Block includes one or more TBs (Transport blocks). As a sub-embodiment, the first bit Block is part of a Transport Block (TB).

Specifically, according to an aspect of the present invention, the above method is characterized in that P is 2, the first signaling set includes first downlink signaling and second downlink signaling, the first downlink signaling indicates the second frequency-domain resource, and at least one of { the second downlink signaling, the position of the target time interval in the L time intervals } is used to determine a mapping relationship of the second frequency-domain resource to the first frequency-domain resource.

As an embodiment, the first downlink signaling and the second downlink signaling are used in combination, and the header overhead of resource allocation can be effectively reduced through the location information of the target time interval in the L time intervals.

As an embodiment, the first downlink signaling is higher layer signaling, and the second downlink signaling is physical layer signaling. As a sub-embodiment of this embodiment, the higher layer signaling is RRC (Radio Resource Control) signaling.

As an embodiment, the first downlink signaling is physical layer signaling, and the second downlink signaling is physical layer signaling.

As a sub-embodiment of the foregoing embodiment, the combined use of the first downlink signaling and the second downlink signaling can effectively reduce the physical layer signaling overhead in resource allocation.

As an embodiment, the first downlink signaling is applicable to the L time intervals, and the second downlink signaling is applicable to the target time interval.

As an embodiment, the location of the target time interval in the L time intervals is related to a delay of the target time interval from a transmission time of the first downlink signaling.

As an embodiment, the position of the target time interval in the L time intervals refers to: an index of the target time interval in the L time intervals.

As an embodiment, the L time intervals constitute one subframe (subframe).

As an embodiment, the L time intervals belong to one radio frame (radio frame).

As an embodiment, the L Time intervals constitute one Time Slot (TS).

as an embodiment, the L time intervals are equally spaced.

As an embodiment, the second downlink signaling includes scheduling information corresponding to the first wireless signal, and the scheduling information includes at least one of { MCS, NDI, RV, HARQ process number }.

Specifically, according to an aspect of the present invention, the method is characterized in that the number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain resource. The mapping relationship of the second frequency domain resource to the first frequency domain resource is one of R candidate relationships, and R is greater than 1.

As an embodiment, for one of the R candidate relations, the second frequency-domain resource and the first frequency-domain resource completely coincide.

as an embodiment, R is 2.

as one embodiment, R is greater than 2.

Specifically, according to an aspect of the present invention, the above method is characterized in that the R kinds of candidate relations include a first candidate relation and a second candidate relation. For the first candidate relationship, the second frequency-domain resource and the first frequency-domain resource are completely coincident; for the second candidate relationship, the second frequency-domain resource and the first frequency-domain resource are orthogonal or partially coincident in the frequency domain.

As an embodiment, the second frequency-domain resources are contiguous in frequency domain and the first frequency-domain resources are contiguous in frequency domain.

as an embodiment, the second frequency-domain resources are contiguous in frequency domain and the first frequency-domain resources are discrete in frequency domain.

As an embodiment, the second frequency-domain resources are discrete in the frequency domain and the first frequency-domain resources are discrete in the frequency domain.

In particular, according to one aspect of the invention, the above method is characterized in that the second frequency-domain resources are contiguous in the frequency domain and the first frequency-domain resources are contiguous in the frequency domain. The bandwidth occupied by the second frequency domain resource and the bandwidth occupied by the first frequency domain resource are equal. For the second candidate relationship, a difference between a center frequency point of the first frequency domain resource and a center frequency point of the second frequency domain resource is a first frequency offset value.

As an embodiment, the bandwidth corresponding to the first frequency offset value includes a positive integer number of subcarriers.

As an embodiment, the bandwidth corresponding to the first frequency offset value includes Q subbands (sub-bands), where Q is an integer greater than or equal to 0, the subbands include J frequency-domain consecutive subcarriers (subcarriers), and J is a positive integer. As a sub-embodiment, J is a multiple of 12. As an embodiment, the frequency domain width of the sub-bands is not greater than the total allocated frequency domain resources for the target time interval.

as an embodiment, the first frequency offset value is determined by a first frequency domain mirror resource, which is frequency offset from the second frequency domain resource by the Q subbands. The first frequency domain resource and the first frequency domain mirror image resource are symmetrical in the sub-band where the first frequency domain mirror image resource is located with respect to the intermediate frequency of the sub-band where the first frequency domain mirror image resource is located. As an embodiment, the first frequency domain mirror resource is identical to the first frequency domain resource.

As an embodiment, the first frequency offset value is related to a frequency offset value of a time interval preceding the target time interval.

As an embodiment, the first frequency offset value is determined by the following formula:

Δf(i)＝Δf(i-1)+α(i)

Where Δ f (i) represents the first frequency offset value, Δ f (i-1) represents the frequency offset value of the first frequency offset value from the time interval preceding the target time interval, and α (i) represents the frequency offset value of the target time interval in units of the sub-bands.

specifically, according to an aspect of the present invention, the above method is characterized in that the second downlink signaling is used to determine whether the mapping relationship of the second frequency domain resource to the first frequency domain resource is the first candidate relationship. { the second downlink signaling, the position of the target time interval in the L time intervals }, is used to determine the second candidate relationship.

As an embodiment, the second signaling explicitly indicates the first frequency offset value.

As one embodiment, the second signaling implicitly indicates the first frequency offset value.

As an embodiment, the second downlink signaling indicates that a mapping relationship of the second frequency domain resource to the first frequency domain resource is the second candidate relationship, and a position of the target time interval in the L time intervals implicitly indicates the second candidate relationship.

As an embodiment, at least one of a first sequence is used for determining the first frequency offset value, the second downlink signaling, and a position of the target time interval in the L time intervals } is used for determining the first sequence.

As a sub-embodiment of the above embodiment, the first sequence is a pseudo-random sequence.

As a sub-embodiment of the above embodiment, the initial value of the first sequence generator and a Physical Cell Identity (PCI) are correlated.

As a sub-embodiment of the above embodiment, the first frequency offset value is linearly related to the first sequence. In one embodiment, the coefficient of the linear correlation is a power of 2 to the power of W, where W is at least one of {0,1,2,3,4,5,6,7,8 }.

As a sub-embodiment of the above embodiment, the first frequency offset value is determined by:

Wherein Δ f (i) represents the first frequency offset value, Δ f (i-1) represents a frequency offset value of the first frequency offset value from a time interval previous to the target time interval represents a number of PRBs included in the sub-band, Nsb represents a number of the sub-band, and c (k) is a pseudo-random sequence.

As a sub-embodiment of the above embodiment, the use of the first sequence may randomize the first frequency offset, thereby avoiding collision of frequency resource allocations, randomizing interference between adjacent cells.

As an embodiment, the frequency offset of the first frequency-domain mirror resource and the second frequency-domain resource is linearly related to the first sequence.

As an embodiment, the first sequence is used to determine a first variable, the first variable being one of {0,1}, where 0 denotes that the first frequency-domain mirrored resource is the same as the first frequency-domain resource and 1 denotes that the first frequency-domain mirrored resource is different from the first frequency-domain resource.

As a sub-embodiment of the above embodiment, the first variable is determined by:

Δf(i)＝c(i·10)

Where Δ fm (i) represents the first variable, and c (k) is a pseudorandom sequence.

specifically, according to an aspect of the present invention, the method is characterized in that the second downlink signaling includes scheduling information corresponding to the first wireless signal, and the scheduling information includes at least one of { MCS, NDI, RV, HARQ process number }. { NDI in scheduling information corresponding to the first radio signal, RV in scheduling information corresponding to the first radio signal, HARQ process number in scheduling information corresponding to the first radio signal, HI corresponding to the first radio signal } is used to determine the second candidate relationship.

as an embodiment, frequency diversity gain is introduced between initial transmission and retransmission of wireless signals, and the robustness of the system is enhanced.

As an embodiment, an NDI (New Data Indicator) in the scheduling information corresponding to the first wireless signal indicates the second candidate relationship from two mapping relationships.

As an embodiment, a RV (Redundancy Version) in the scheduling information corresponding to the first wireless signal indicates the second candidate relationship from P kinds of mapping relationships, where P is a positive integer greater than 1. As a sub-embodiment, P is 2. As a sub-embodiment, P is 4.

As an embodiment, an HI (HARQ Indicator) corresponding to the first radio signal indicates the second candidate relationship from two mapping relationships

As an embodiment, the NDI in the scheduling information corresponding to the first wireless signal is used to determine the second candidate relationship from two candidate relationships, where the two candidate relationships include the first candidate relationship and the second candidate relationship.

As an embodiment, the HI corresponding to the first wireless signal is used to determine the second candidate relationship from two candidate relationships, including the first candidate relationship and the second candidate relationship.

As an embodiment, at least one of NDI in the scheduling information corresponding to the first wireless signal, HI corresponding to the first wireless signal determines a second variable, which is used to determine the second candidate relationship from two candidate relationships, the two candidate relationships including the first candidate relationship and the second candidate relationship.

As a sub-embodiment of the above embodiment, the parity of the second variable is used to determine the second candidate relationship from two candidate relationships, the two candidate relationships comprising the first candidate relationship and the second candidate relationship.

Specifically, according to one aspect of the present invention, the above method is characterized in that the step a further comprises the steps of:

-step A0. receiving a second set of signalling used for determining at least one of { target frequency domain resource pool, minimum granularity of the first frequency offset value }.

Wherein the second set of signaling indicates the second frequency-domain resource from the target resource pool.

For one embodiment, the second set of signaling includes one or more higher layer signaling.

As an embodiment, the second set of signaling includes one or more physical layer signaling.

As an embodiment, the second signaling set includes one or more physical layer signaling, and the second signaling set includes scheduling information of the first wireless signal, where the scheduling information includes at least one of { occupied time-frequency resource, MCS, RV, NDI, HARQ process number }.

For one embodiment, the target frequency domain resource pool is smaller than a system bandwidth.

As an embodiment, the target pool of frequency domain resources is contiguous in the frequency domain.

As an embodiment, the target pool of frequency domain resources is discrete in the frequency domain.

as an embodiment, the frequency domain resources occupied by the target frequency domain resource pool and a Physical Uplink Control Channel (PUCCH) in the target time interval are orthogonal (i.e. do not overlap).

As an embodiment, the minimum granularity of the first frequency offset value is a frequency domain width of the sub-band.

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

-step a. sending a first set of signalling

-step b.

The time domain resource occupied by the first wireless signal belongs to a target time interval, the target time interval is one of L time intervals, L is a positive integer greater than 1, and the time length of any one of the L time intervals is less than 1 millisecond. The first signaling set comprises P downlink signaling, and P is a positive integer. The frequency domain resources occupied by the first wireless signal are first frequency domain resources. The first set of signaling is used to determine second frequency domain resources. { the first signaling set, the position of the target time interval in the L time intervals }, is used to determine a mapping of the second frequency-domain resources to the first frequency-domain resources. The first frequency resource and the second frequency resource belong to different time intervals. The performing is receiving or the performing is transmitting. The first wireless signal carries a first bit block comprising a positive integer number of bits, the first bit block transmitted in the target interval of the L time intervals.

As an embodiment, the performing is receiving, and the transmission Channel corresponding to the first wireless signal is an Uplink Shared Channel (UL-SCH) mapped in the target time interval.

As an embodiment, the performing is sending, and the transmission Channel corresponding to the first wireless signal is a Downlink Shared Channel (DL-SCH) mapped in the target time interval.

-step A0. sending a second set of signalling used for determining at least one of { target frequency domain resource pool, minimum granularity of the first frequency offset value }.

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

-a first receiving module: for receiving a first set of signalling

-a first processing module: for operating on the first wireless signal.

Specifically, according to an aspect of the present invention, the above user equipment is characterized in that P is 2, the first signaling set includes first downlink signaling and second downlink signaling, and at least one of the first downlink signaling indicates the second frequency-domain resource and { the second downlink signaling, a position of the target time interval in the L time intervals } is used to determine a mapping relationship of the second frequency-domain resource to the first frequency-domain resource.

Specifically, according to an aspect of the present invention, the user equipment is characterized in that the number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain resource. The mapping relationship of the second frequency domain resource to the first frequency domain resource is one of R candidate relationships, and R is greater than 1.

Specifically, according to an aspect of the present invention, the user equipment is characterized in that the R candidate relations include a first candidate relation and a second candidate relation. For the first candidate relationship, the second frequency-domain resource and the first frequency-domain resource are completely coincident; for the second candidate relationship, the second frequency-domain resource and the first frequency-domain resource are orthogonal or partially coincident in the frequency domain.

Specifically, according to an aspect of the present invention, the above user equipment is characterized in that the second frequency domain resources are contiguous in frequency domain, and the first frequency domain resources are contiguous in frequency domain. The bandwidth occupied by the second frequency domain resource and the bandwidth occupied by the first frequency domain resource are equal. For the second candidate relationship, a difference between a center frequency point of the first frequency domain resource and a center frequency point of the second frequency domain resource is a first frequency offset value.

Specifically, according to an aspect of the present invention, the above user equipment is characterized in that the second downlink signaling is used to determine whether a mapping relationship of the second frequency domain resource to the first frequency domain resource is the first candidate relationship. { the second downlink signaling, the position of the target time interval in the L time intervals }, is used to determine the second candidate relationship.

specifically, according to an aspect of the present invention, the above user equipment is characterized in that the second downlink signaling includes scheduling information corresponding to the first wireless signal, and the scheduling information includes at least one of { MCS, NDI, RV, HARQ process number }. { NDI in scheduling information corresponding to the first radio signal, RV in scheduling information corresponding to the first radio signal, HARQ process number in scheduling information corresponding to the first radio signal, HI corresponding to the first radio signal } is used to determine the second candidate relationship.

Specifically, according to an aspect of the present invention, the above user equipment is characterized in that the first receiving module is further configured to receive a second signaling set. The second set of signaling is used to determine at least one of { target frequency domain resource pool, minimum granularity of the first frequency offset value }.

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

-a first sending module: for transmitting a first set of signalling

-a second processing module: for executing the first wireless signal.

Specifically, according to an aspect of the present invention, the base station device is characterized in that P is 2, and the first signaling set includes first downlink signaling and second downlink signaling, where the first downlink signaling indicates the second frequency-domain resource, and { the second downlink signaling, a position of the target time interval in the L time intervals } is used to determine a mapping relationship between the second frequency-domain resource and the first frequency-domain resource.

Specifically, according to an aspect of the present invention, the base station apparatus is characterized in that the number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain resource. The mapping relationship of the second frequency domain resource to the first frequency domain resource is one of R candidate relationships, and R is greater than 1.

Specifically, according to an aspect of the present invention, the base station device is characterized in that the R candidate relationships include a first candidate relationship and a second candidate relationship. For the first candidate relationship, the second frequency-domain resource and the first frequency-domain resource are completely coincident; for the second candidate relationship, the second frequency-domain resource and the first frequency-domain resource are orthogonal or partially coincident in the frequency domain.

Specifically, according to an aspect of the present invention, the base station apparatus described above is characterized in that the second frequency domain resources are contiguous in the frequency domain, and the first frequency domain resources are contiguous in the frequency domain. The bandwidth occupied by the second frequency domain resource and the bandwidth occupied by the first frequency domain resource are equal. For the second candidate relationship, a difference between a center frequency point of the first frequency domain resource and a center frequency point of the second frequency domain resource is a first frequency offset value.

Specifically, according to an aspect of the present invention, the base station apparatus is characterized in that the second downlink signaling is used to determine whether a mapping relationship of the second frequency domain resource to the first frequency domain resource is the first candidate relationship. { the second downlink signaling, the position of the target time interval in the L time intervals }, is used to determine the second candidate relationship.

Specifically, according to an aspect of the present invention, the base station apparatus is characterized in that the second downlink signaling includes scheduling information corresponding to the first wireless signal, and the scheduling information includes at least one of { MCS, NDI, RV, HARQ process number }. { NDI in scheduling information corresponding to the first radio signal, RV in scheduling information corresponding to the first radio signal, HARQ process number in scheduling information corresponding to the first radio signal, HI corresponding to the first radio signal } is used to determine the second candidate relationship.

Specifically, according to an aspect of the present invention, the base station device is characterized in that the first sending module is further configured to send the second set of signaling. The second set of signaling is used to determine at least one of { target frequency domain resource pool, minimum granularity of the first frequency offset value }.

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

-obtaining a frequency diversity gain in dependence of the time length of the sTTI, the location information of the sTTI, and the signaling to flexibly configure and switch the mapping or hopping of virtual resource blocks to physical resource blocks of the wireless signal transmitted in time intervals of less than 1 millisecond;

-reducing scheduling signaling header overhead for resource allocation of radio signals transmitted in sTTI;

-flexibly configuring resource mapping or frequency hopping patterns, avoiding collisions of frequency domain resource allocations, randomizing interference of neighbouring cells.

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 downlink transmission flow diagram according to an embodiment of the invention;

Fig. 2 shows an uplink transmission flow diagram according to an embodiment of the invention;

FIG. 3 illustrates a target time interval diagram according to an embodiment of the present invention;

FIG. 4 shows a first frequency domain resource diagram according to an embodiment of the invention;

FIG. 5 is a diagram illustrating a relationship between a first frequency domain resource and a first frequency domain mirror resource according to an embodiment of the invention;

Fig. 6 shows a first frequency domain mirror resource diagram according to an embodiment of the invention;

FIG. 7 shows a block diagram of a processing device in a User Equipment (UE) according to an embodiment of the invention;

Fig. 8 shows a block diagram of a processing means in a base station according to an embodiment of the 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 downlink transmission flow chart, as shown in fig. 1. In fig. 1, base station N1 is the maintaining base station for the serving cell of UE U2, and the steps identified in block F1 are optional.

for base station N1, the second set of signaling is transmitted in step S11, the first set of signaling is transmitted in step S12, and the first wireless signal is transmitted in step S13.

UE U2For the UE U2, the second set of signaling is received in step S21, the first set of signaling is received in step S22, and the first wireless signal is received in step S23.

In embodiment 1, the time domain resource occupied by the first wireless signal belongs to a target time interval, where the target time interval is one of L time intervals, where L is a positive integer greater than 1, and a time length of any one of the L time intervals is less than 1 millisecond. The first wireless signal carries a first bit block comprising a positive integer number of bits, the first bit block transmitted in the target interval of the L time intervals. The first signaling set comprises P downlink signaling, and P is a positive integer. The frequency domain resources occupied by the first wireless signal are first frequency domain resources. The first set of signaling is used to determine second frequency domain resources. { the first signaling set, the position of the target time interval in the L time intervals }, is used to determine a mapping of the second frequency-domain resources to the first frequency-domain resources. The first frequency resource and the second frequency resource belong to different time intervals. The second set of signaling is used to determine at least one of { a target pool of frequency domain resources, a minimum granularity of frequency offset values for the first and second frequency resources }, wherein the second set of signaling indicates the second frequency domain resources from the target pool of resources.

In sub-embodiment 1 of embodiment 1, P is 2, and the first signaling set includes first downlink signaling and second downlink signaling, where at least one of the first downlink signaling indicates the second frequency-domain resource and { the position of the second downlink signaling in the L time intervals, where the target time interval is located } is used to determine a mapping relationship between the second frequency-domain resource and the first frequency-domain resource.

In sub-embodiment 2 of embodiment 1, the first signaling set is transmitted through DCI (Downlink Control Information).

In sub-embodiment 3 of embodiment 1, the second set of signaling is transmitted via rrc (radio Resource control).

In sub-embodiment 4 of embodiment 1, the number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain resource. The mapping relationship of the second frequency domain resource to the first frequency domain resource is one of R candidate relationships, and R is greater than 1. The R candidate relations comprise a first candidate relation and a second candidate relation. For the first candidate relationship, the second frequency-domain resource and the first frequency-domain resource are completely coincident; for the second candidate relationship, the second frequency-domain resource and the first frequency-domain resource are orthogonal or partially coincident in the frequency domain. The first set of signaling is used to determine whether a mapping of the second frequency-domain resources to the first frequency-domain resources is the first candidate relationship. { the first set of signaling, the position of the target time interval in the L time intervals }, is used to determine the second candidate relationship.

In sub-embodiment 5 of embodiment 1, the transmission Channel corresponding to the first radio signal is a Downlink Shared Channel (DL-SCH) mapped to the target time interval.

In sub-embodiment 6 of embodiment 1, the first radio signal is an output of the first bit block after sequentially performing Channel Coding (Channel Coding), Modulation Mapper (Modulation Mapper), Layer Mapper (Layer Mapper), Precoding (Precoding), Resource Element Mapper (Resource Element Mapper), and OFDM signal Generation (Generation). As a sub-embodiment, the first bit Block includes one or more TBs (Transport blocks). As a sub-embodiment, the first bit Block is part of a Transport Block (TB).

Example 2

Embodiment 2 illustrates an uplink transmission flow chart, as shown in fig. 2. In fig. 2, base station N3 is the maintaining base station for the serving cell of UE U4, and the steps identified in block F2 are optional.

For base station N3, the second set of signaling is transmitted in step S31, the first set of signaling is transmitted in step S32, and the first wireless signal is received in step S33.

UE U4for UE U4, receiving a second set of signaling in step S41; the first set of signaling is received in step S42, and a first wireless signal is transmitted in step S43.

In embodiment 2, the time domain resource occupied by the first wireless signal belongs to a target time interval, where the target time interval is one of L time intervals, where L is a positive integer greater than 1, and a time length of any one of the L time intervals is less than 1 millisecond. The first wireless signal carries a first bit block comprising a positive integer number of bits, the first bit block transmitted in the target interval of the L time intervals. The first signaling set comprises P downlink signaling, and P is a positive integer. The frequency domain resources occupied by the first wireless signal are first frequency domain resources. The first set of signaling is used to determine second frequency domain resources. { the first signaling set, the position of the target time interval in the L time intervals }, is used to determine a mapping of the second frequency-domain resources to the first frequency-domain resources. The first frequency resource and the second frequency resource belong to different time intervals. The second set of signaling is used to determine at least one of { a target pool of frequency domain resources, a minimum granularity of frequency offset values for the first and second frequency resources }, wherein the second set of signaling indicates the second frequency domain resources from the target pool of resources.

In sub-embodiment 1 of embodiment 2, P is 2, and the first signaling set includes first downlink signaling and second downlink signaling, where at least one of the first downlink signaling indicates the second frequency-domain resource and { the position of the second downlink signaling in the L time intervals, where the target time interval is located } is used to determine a mapping relationship between the second frequency-domain resource and the first frequency-domain resource.

In sub-embodiment 2 of embodiment 2, the first signaling set is transmitted through DCI (Downlink Control Information).

In sub-embodiment 3 of embodiment 2, the second set of signaling is transmitted via rrc (radio Resource control).

In sub-embodiment 4 of embodiment 2, the number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain resource. The mapping relationship of the second frequency domain resource to the first frequency domain resource is one of R candidate relationships, and R is greater than 1. The R candidate relations comprise a first candidate relation and a second candidate relation. For the first candidate relationship, the second frequency-domain resource and the first frequency-domain resource are completely coincident; for the second candidate relationship, the second frequency-domain resource and the first frequency-domain resource are orthogonal or partially coincident in the frequency domain. The first set of signaling is used to determine whether a mapping of the second frequency-domain resources to the first frequency-domain resources is the first candidate relationship. { the first set of signaling, the position of the target time interval in the L time intervals }, is used to determine the second candidate relationship.

In sub-embodiment 5 of embodiment 2, the transmission Channel corresponding to the first radio signal is an Uplink Shared Channel (UL-SCH) mapped to the target time interval.

In sub-embodiment 6 of embodiment 2, the first radio signal is an output of the first bit block after sequentially performing Channel Coding (Channel Coding), Modulation Mapper (Modulation Mapper), Layer Mapper (Layer Mapper), Precoding (Precoding), Resource Element Mapper (Resource Element Mapper), and OFDM signal Generation (Generation). As a sub-embodiment, the first bit Block includes one or more TBs (Transport blocks). As a sub-embodiment, the first bit Block is part of a Transport Block (TB).

example 3

Example 3 illustrates a diagram of the relationship between the target time interval and L time intervals, as shown in fig. 3. In fig. 3, each box represents one of L time intervals, and the filled box represents a target time interval, which is one of the L time intervals, the L time intervals constituting one subframe (subframe), where L is a positive integer greater than 1.

In sub-embodiment 1 of embodiment 3, any one of the L time intervals includes R time-domain consecutive OFDM symbols, the OFDM symbols include a cyclic prefix, and R is a positive integer.

In a sub-embodiment 2 of embodiment 3, the duration of the L time intervals is the same.

In a sub-embodiment 3 of embodiment 3, the duration of two of said L time intervals is different.

In sub-embodiment 4 of embodiment 3, the L time intervals are consecutive.

In sub-embodiment 5 of embodiment 3, the position of the target time interval in the L time intervals is the index number of the target time interval in the L time intervals.

Example 4

Embodiment 4 illustrates a schematic relationship between a first frequency domain resource and a second frequency domain resource, as shown in fig. 4. In fig. 4, the horizontal axis represents time and the vertical axis represents frequency, and the area marked by the left oblique line identifies the first wireless signal transmission using the first frequency domain resource, and the first wireless signal occupies the target time interval. The number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain resource.

In sub-embodiment 1 of embodiment 4, the first frequency-domain resource comprises Q frequency-domain consecutive subcarriers, Q being a positive integer. As a sub-embodiment, Q is a multiple of 12.

In sub-embodiment 2 of embodiment 4, the first frequency domain Resource is aligned with F Physical Resource Blocks (PRBs) in the frequency domain, where F is a positive integer greater than or equal to 1.

In sub-embodiment 3 of embodiment 4, the second frequency domain resources are contiguous in the frequency domain and the first frequency domain resources are contiguous in the frequency domain.

in a sub-embodiment 4 of embodiment 4, the second frequency domain resources are contiguous in the frequency domain and the first frequency domain resources are discrete in the frequency domain.

In sub-embodiment 5 of embodiment 4, the second frequency-domain resources are discrete in the frequency domain and the first frequency-domain resources are discrete in the frequency domain.

Example 5

Embodiment 5 illustrates a schematic relationship between a first frequency domain resource and a first frequency domain mirror resource, as shown in fig. 5. In fig. 5, a region of a left oblique line corresponds to a first frequency domain resource, a region of a right oblique line corresponds to a first frequency domain mirror resource, the first frequency domain resource and the first frequency domain mirror resource are included in a sub-band and are symmetrical with respect to a center frequency of the sub-band.

In sub-embodiment 1 of embodiment 5, the sub-band contains J frequency-domain contiguous sub-carriers (subcarriers), J being a positive integer. As a sub-embodiment, J is a multiple of 12. As an embodiment, the frequency domain width of the sub-bands is not greater than the total allocated frequency domain resources for the target time interval.

In sub-embodiment 2 of embodiment 5, the first frequency domain resources and the first frequency domain mirror resources are the same.

In sub-embodiment 3 of embodiment 5, the first frequency domain resources and the first frequency domain mirror resources are different.

In sub-embodiment 4 of embodiment 5, the frequency offset of the first frequency domain mirror resource and the second frequency domain resource is linearly related to the first sequence.

In a sub-embodiment of the above sub-embodiment 4, the first sequence is used to determine the second sequence

Δ fm (i) ═ c (i · 10) a variable, the first variable being one of {0,1}, where 0 denotes that the first frequency-domain mirror resource is the same as the first frequency-domain resource, and 1 denotes that the first frequency-domain mirror resource is different from the first frequency-domain resource. The first variable is determined by:

Example 6

Embodiment 6 illustrates a relationship diagram of a first frequency domain mirror resource and a second frequency domain resource, as shown in fig. 6. In fig. 6, the horizontal axis represents time and the vertical axis represents frequency, the area marked by the vertical line identifies wireless signal transmission using the second frequency domain resource, and the area marked by the right oblique line identifies the first frequency domain mirror resource. The number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain mirror resource.

In sub-embodiment 1 of embodiment 6, the first frequency-domain mirror resource comprises Q frequency-domain consecutive subcarriers, Q being a positive integer. As a sub-embodiment, Q is a multiple of 12.

In sub-embodiment 2 of embodiment 6, the first frequency-domain mirror Resource is aligned with F Physical Resource Blocks (PRBs) in the frequency domain, where F is a positive integer greater than or equal to 1.

In sub-embodiment 3 of embodiment 6, the second frequency domain resources are contiguous in the frequency domain and the first frequency domain mirror resources are contiguous in the frequency domain.

In sub-embodiment 4 of embodiment 6, the second frequency domain resources are contiguous in the frequency domain and the first frequency domain mirror resources are discrete in the frequency domain.

In sub-embodiment 5 of embodiment 6, the second frequency-domain resources are discrete in the frequency domain, and the first frequency-domain mirror resources are discrete in the frequency domain.

Example 7

Embodiment 7 illustrates a block diagram of a processing device in a user equipment, as shown in fig. 7. In fig. 7, the ue processing apparatus 100 is mainly composed of a first receiving module 101 and a first processing module 102.

In embodiment 7, the first receiving module 101 receives a first set of signaling, which is used to determine the second frequency domain resources. { the first signaling set, the position of the target time interval in the L time intervals }, is used to determine a mapping of the second frequency-domain resources to first frequency-domain resources. The frequency domain resource occupied by the first wireless signal is the first frequency domain resource. The first frequency resource and the second frequency resource belong to different time intervals. The first processing module 102 is configured to operate on a first wireless signal, the operation is transmitting or the operation is receiving. The first wireless signal carries a first bit block comprising a positive integer number of bits, the first bit block transmitted in the target interval of the L time intervals. The first receiving module 101 is further configured to receive a second set of signaling used to determine at least one of { a target pool of frequency domain resources, a minimum granularity of frequency offset values for the first frequency domain resources and the second frequency domain resources }, wherein the second set of signaling indicates the second frequency domain resources from the target pool of resources.

in sub-embodiment 1 of embodiment 7, the first set of signaling received by the first receiving module 101 is transmitted through DCI, and the second set of signaling received by the first receiving module 101 is transmitted through RRC.

In sub-embodiment 2 of embodiment 7, the first processing module 102 is configured to determine a first frequency offset value, where the first frequency offset value is a difference between a center frequency point of the first frequency domain resource and a center frequency point of the second frequency domain resource.

In sub-embodiment 3 of embodiment 7, the first frequency offset value is determined by:

Where Δ f (i) represents the first frequency offset value, Δ f (i-1) represents the frequency offset value of the first frequency offset value from the time interval immediately preceding the target time interval, represents the number of PRBs included in a subband, Nsb represents the number of the subbands, and c (k) is a pseudo-random sequence.

Example 8

Embodiment 8 is a block diagram illustrating a processing apparatus in a base station device, as shown in fig. 8. In fig. 8, the base station processing apparatus 200 is mainly composed of a first transmitting module 201 and a second transmitting module 202.

In embodiment 8, the first sending module 201 is configured to send a first set of signaling, which is used to determine the second frequency domain resources. { the first signaling set, the position of the target time interval in the L time intervals }, is used to determine a mapping of the second frequency-domain resources to first frequency-domain resources. The frequency domain resource occupied by the first wireless signal is the first frequency domain resource. The first frequency resource and the second frequency resource belong to different time intervals. The second processing module 202 is configured to execute the first wireless signal, wherein the execution is receiving or the execution is transmitting. The first wireless signal carries a first bit block comprising a positive integer number of bits, the first bit block transmitted in the target interval of the L time intervals. The first sending module 201 is further configured to send a second set of signaling, the second set of signaling being used to determine at least one of { a target pool of frequency-domain resources, a minimum granularity of frequency offset values for the first frequency-domain resources and the second frequency-domain resources }, wherein the second set of signaling indicates the second frequency-domain resources from the target pool of resources.

In sub-embodiment 1 of embodiment 8, the first signaling set sent by the first sending module 201 is transmitted through DCI, and the second signaling set sent by the first sending module 201 is transmitted through RRC.

In sub-embodiment 2 of embodiment 8, the second processing module 202 is configured to determine a first frequency offset value, where the first frequency offset value is a difference between a center frequency point of the first frequency domain resource and a center frequency point of the second frequency domain resource.

In sub-embodiment 3 of embodiment 8, the first frequency offset value is determined by:

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 or the terminal in the present invention includes, but is not limited to, a mobile phone, a tablet computer, a notebook, a network card, a low power consumption device, a vehicle-mounted communication device, and other wireless communication devices. The base station or network side device 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 to be used in a low latency UE, comprising the steps of:

-step a. receiving a first set of signalling

-step b. operating on the first wireless signal;

The time domain resource occupied by the first wireless signal belongs to a target time interval, the target time interval is one of L time intervals, L is a positive integer greater than 1, and the time length of any one of the L time intervals is less than 1 millisecond; the first signaling set comprises P downlink signaling, wherein P is a positive integer; the frequency domain resources occupied by the first wireless signals are first frequency domain resources; the first set of signaling is used to determine second frequency domain resources; { the first set of signaling, the position of the target time interval in the L time intervals } is used to determine a mapping of the second frequency-domain resources to the first frequency-domain resources; the first frequency resource and the second frequency resource belong to different time intervals; the operation is a transmission or the operation is a reception; the first wireless signal carries a first bit block comprising a positive integer number of bits, the first bit block transmitted in the target interval of the L time intervals; the L time intervals constitute one subframe.

2. A method used in a low-latency base station, comprising the steps of:

-step a. sending a first set of signalling

-step b. executing the first wireless signal;

The time domain resource occupied by the first wireless signal belongs to a target time interval, the target time interval is one of L time intervals, L is a positive integer greater than 1, and the time length of any one of the L time intervals is less than 1 millisecond; the first signaling set comprises P downlink signaling, wherein P is a positive integer; the frequency domain resources occupied by the first wireless signals are first frequency domain resources; the first set of signaling is used to determine second frequency domain resources; { the first set of signaling, the position of the target time interval in the L time intervals } is used to determine a mapping of the second frequency-domain resources to the first frequency-domain resources; the first frequency resource and the second frequency resource belong to different time intervals; the performing is receiving or the performing is transmitting; the first wireless signal carries a first bit block comprising a positive integer number of bits, the first bit block transmitted in the target interval of the L time intervals; the L time intervals constitute one subframe.

3. A user equipment for low latency, comprising:

-a first receiving module: for receiving a first set of signalling

-a first processing module: for operating on the first wireless signal;

4. The UE of claim 3, wherein the first receiving module is further configured to receive a second set of signaling; the second set of signaling is used to determine at least one of { target frequency domain resource pool, minimum granularity of the first frequency offset value };

5. the UE of claim 3, wherein P is 2, and the first signaling set comprises first downlink signaling and second downlink signaling, and the first downlink signaling indicates the second frequency-domain resource, and at least one of { the second downlink signaling, the position of the target time interval in the L time intervals } is used for determining the mapping relationship of the second frequency-domain resource to the first frequency-domain resource.

6. The UE of claim 3, wherein the second frequency-domain resource comprises the same number of subcarriers as the first frequency-domain resource; the mapping relationship of the second frequency domain resource to the first frequency domain resource is one of R candidate relationships, wherein R is greater than 1; the R candidate relations comprise a first candidate relation and a second candidate relation; for the first candidate relationship, the second frequency-domain resource and the first frequency-domain resource are completely coincident; for the second candidate relationship, the second frequency-domain resource and the first frequency-domain resource are orthogonal or partially coincident in the frequency domain.

7. The UE of claim 6, wherein the second frequency-domain resources are contiguous in frequency domain, and wherein the first frequency-domain resources are contiguous in frequency domain; the bandwidth occupied by the second frequency domain resource is equal to the bandwidth occupied by the first frequency domain resource; for the second candidate relationship, a difference between a center frequency point of the first frequency domain resource and a center frequency point of the second frequency domain resource is a first frequency offset value; the second downlink signaling is used to determine whether a mapping relationship of the second frequency domain resource to the first frequency domain resource is the first candidate relationship; { the second downlink signaling, the position of the target time interval in the L time intervals }, is used to determine the second candidate relationship; the second downlink signaling comprises scheduling information corresponding to the first wireless signal, wherein the scheduling information comprises at least one of { MCS, NDI, RV, HARQ process number }; { NDI in scheduling information corresponding to the first radio signal, RV in scheduling information corresponding to the first radio signal, HARQ process number in scheduling information corresponding to the first radio signal, HI corresponding to the first radio signal } is used to determine the second candidate relationship.

8. A base station device used for low latency, comprising:

-a first sending module: for transmitting a first set of signalling

-a second processing module: for executing the first wireless signal;

9. The base station device of claim 8, wherein the first sending module is further configured to send a second set of signaling; the second set of signaling is used to determine at least one of { target frequency domain resource pool, minimum granularity of the first frequency offset value };

10. The base station device according to claim 9, wherein P is 2, and the first signaling set includes first downlink signaling and second downlink signaling, and the first downlink signaling indicates the second frequency-domain resource, and at least one of { the second downlink signaling, the position of the target time interval in the L time intervals } is used for determining the mapping relationship of the second frequency-domain resource to the first frequency-domain resource.

11. The base station device according to claim 9 or 10, wherein the number of subcarriers included in the second frequency domain resource is the same as the number of subcarriers included in the first frequency domain resource; the mapping relationship of the second frequency domain resource to the first frequency domain resource is one of R candidate relationships, wherein R is greater than 1; the R candidate relations comprise a first candidate relation and a second candidate relation; for the first candidate relationship, the second frequency-domain resource and the first frequency-domain resource are completely coincident; for the second candidate relationship, the second frequency-domain resource and the first frequency-domain resource are orthogonal or partially coincident in the frequency domain; the second frequency domain resources are contiguous in frequency domain, the first frequency domain resources are contiguous in frequency domain; the bandwidth occupied by the second frequency domain resource is equal to the bandwidth occupied by the first frequency domain resource; for the second candidate relationship, a difference between a center frequency point of the first frequency domain resource and a center frequency point of the second frequency domain resource is a first frequency offset value; the second downlink signaling is used to determine whether a mapping relationship of the second frequency domain resource to the first frequency domain resource is the first candidate relationship; { the second downlink signaling, the position of the target time interval in the L time intervals }, is used to determine the second candidate relationship.