CN106550445B - Method and apparatus for low latency in wireless communications - Google Patents
Method and apparatus for low latency in wireless communications Download PDFInfo
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- CN106550445B CN106550445B CN201510600989.4A CN201510600989A CN106550445B CN 106550445 B CN106550445 B CN 106550445B CN 201510600989 A CN201510600989 A CN 201510600989A CN 106550445 B CN106550445 B CN 106550445B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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Abstract
The invention discloses a low-delay method and a low-delay device in wireless communication. As an embodiment, the UE receives a first signaling in step one, the first signaling scheduling transmission of the N transport block groups; receiving N transmission block groups in the step two, wherein the N transmission block groups are respectively transmitted in N LTE time slots; and in the third step, sending N uplink signaling in the N sub-resource groups, where the N uplink signaling indicates whether the transport blocks in the N transport block groups are correctly received. Wherein the first signaling is physical layer signaling, and N is a positive integer. One of the transport block groups includes G transport blocks, the G being a positive integer. One of the sub-resource groups comprises J sub-resources, the format of one of the sub-resources is a part of a PUCCH format {1, 1a, 1b } in one LTE slot, and J is 1 or 2. The invention can reduce the network delay and simultaneously keep the compatibility with the existing LTE equipment as far as possible.
Description
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 issue of reducing the delay of the LTE Network is discussed in 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #63 times overall meeting. The delay of the LTE network includes air interface delay, signal processing delay, transmission delay between nodes, and the like. With the upgrade of the radio access network and the core network, the transmission delay is effectively reduced. With the application of new semiconductors with higher processing speeds, the signal processing delay is significantly reduced.
In LTE, a TTI (Transmission Time Interval) or subframe or prb (physical Resource block) Pair (Pair) corresponds to one ms (milli-second) in Time. One LTE subframe includes two Time slots (Time slots), a first Slot and a second Slot, respectively. A PDCCH (Physical downlink Control Channel) occupies first R OFDM (orthogonal frequency Division Multiplexing) symbols of a PRB pair, where R is a positive integer of not more than 4 and is configured by a PCFICH (Physical Control Format Indicator Channel). For FDD (Frequency Division Duplex) LTE, the HARQ (Hybrid Automatic Repeat reQuest) round-trip time is 8ms, and a small number of HARQ retransmissions will cause network delay of tens of ms. Therefore, reducing the air interface delay becomes an effective means for reducing the delay of the LTE network.
The invention provides a solution to the problem of long air interface delay in LTE. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE (User Equipment) of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.
Disclosure of Invention
To reduce air interface delay, one intuitive approach is to use a short TTI, e.g., 0.5 ms. The inventor finds that the length of the TTI is only one factor of the air interface delay, and the time delay caused by the uplink physical layer control signaling of 1ms also significantly affects the air interface delay. Further, the new control signaling scheme should be as compatible as possible with existing LTE devices.
The present invention provides a solution to the above problems.
The invention discloses a method in UE supporting low-delay wireless communication, which comprises the following steps:
-step a. receiving a first signaling, the first signaling scheduling the transmission of the N transport block groups
-step b. receiving N transport block sets, said N transport block sets being transmitted in N LTE timeslots respectively
And step C, respectively sending N uplink signaling in N sub-resource groups, wherein the N sub-resource groups are respectively located in N subsequent LTE time slots, and the N uplink signaling respectively indicates whether transmission blocks in the N transmission block groups are correctly received.
Wherein the first signaling is physical layer signaling, and N is a positive integer. One of the transport block groups includes G transport blocks, the G being a positive integer. One of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2. The given format is one of:
LTE PUCCH format {1, 1a, 1b })
LTE PUCCH format {2, 2a, 2b }.
LTE PUCCH Format 3
PUCCH formats for supporting more than 20 ACK/NACK bits.
In the method, the uplink signaling is sent in one LTE time slot, so that the air interface delay is reduced. On the other hand, the base station dynamically selects a suitable frequency domain resource for the uplink signaling according to parameters such as channel quality, and the like, thereby reducing BLER (block error Rate). Furthermore, reducing the number of PRBs included in the first frequency domain location can improve the uplink coverage (given the maximum uplink transmit power).
Another advantage of the above aspect is that the uplink signaling may coexist with the existing LTE PUCCH formats (e.g. the first format and the second format) in one PRB in the N LTE slots, i.e. the uplink signaling and the LTE PUCCH resources share the PRB, which improves transmission efficiency.
In the invention, the PUCCH Resource is PUCCH Resource in LTE. The detailed definition refers to the definition of PUCCH resource in TS36.213 and TS 36.211.
As an embodiment, the PRBs(s) occupied by the N sub-resource groups in each of the subsequent LTE slots are the same.
As an embodiment, the multiple (greater than 1) PRBs occupied by one said sub-resource group are consecutive in the frequency domain.
As an embodiment, the format of the sub-resource and the given format respectively include the number and position of SC-FDMA (Single Carrier Frequency Division multiplexing) symbols occupied by { RS (Reference Signal, Reference Signal }, RS sequences, positions of SC-FDMA symbols occupied by modulation symbols, and orthogonal sequences adopted by REs to which modulation symbols are mapped, where the modulation symbols are modulated by HARQ-ACK bits.
As an embodiment, the format of the sub-resources and the given format each comprise a number of HARQ-ACK bits.
As an example, N is 1.
As an embodiment, N is 2, and the N LTE slots belong to one LTE subframe.
As an embodiment, the PRB corresponding to the first selected resource belongs to a PUCCH region. That is, the uplink signaling can coexist with the first format or the second format in one PRB
As an embodiment, the first signaling is DCI (Downlink Control Information) for Downlink scheduling (Downlink Grant). As a sub-embodiment of the above embodiment, the first signaling is one of DCI formats {1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, 2D }.
As an embodiment, the transport block is a MAC (Medium Access Control) PDU (Protocol Data Unit).
As an example, G is 1.
As an embodiment, G is 2, and the G transport blocks are respectively transmitted by different antenna ports.
As an embodiment, the first signaling includes G modulation and coding indexes, where the G modulation and coding indexes are respectively used to indicate modulation schemes and coding rates adopted by the G transport blocks in the transport block group (i.e. the N transport block groups share the same G MCSs). As a sub-embodiment of the above embodiment, the Modulation and Coding Scheme index is MCS (Modulation and Coding Scheme) in LTE.
As an embodiment, the given format is a first format, and J is 1.
As an embodiment, the given format is a second format, and J is 1.
As an embodiment, the given format is a third format, and J is 2.
As an embodiment, the given format is a fourth format, and J is greater than 2.
As one embodiment, the fourth format is a PUCCH format for transmitting HARQ-ACK in a scenario where the number of aggregated carriers is greater than 5.
As an embodiment, the number of PRB pairs occupied by one PUCCH resource of the fourth format is greater than 1.
As an embodiment, the uplink signaling is further used to indicate one or more of { SR (Scheduling Request), RI (Rank Indicator), PMI (Precoding Matrix Indicator), CQI (Channel Quality Indicator), and PTI (Precoding Type Indicator) }.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. receives a second signaling indicating L candidate resources, said L being a positive integer.
Wherein the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
For { second format, third format, fourth format }, PUCCH resources occupied by legacy terminal equipment of LTE are configured by higher layer signaling. Therefore, the second signaling can avoid the collision between the uplink signaling and the traditional PUCCH signaling.
As an embodiment of the above aspect, the given format is a PUCCH format other than the first format.
As an embodiment, the first signaling is transmitted on a secondary cell.
As an embodiment, the uplink signaling further indicates whether a target transport block is correctly received, where the target transport block is a transport block other than the N transport block groups.
As an embodiment, the second signaling is RRC (Radio Resource Control) layer signaling.
As an example, L is a positive integer power of 2.
Specifically, according to one aspect of the present invention, the given format is a first format, the first signaling includes first information and second information, the first information indicates a band boundary corresponding to the N sub-resource groups, and the second information indicates an offset of an index of the first selected resource from an index of the first associated resource. The first associated resource is determined by an index of a first channel unit occupied by the first signaling, the first selected resource is composed of the N sub-resource groups, and the first associated resource comprises one sub-resource group at each frequency band boundary in the N subsequent LTE time slots. The RE occupied by the first signaling is composed of one or more channel units, wherein the channel units comprise W REs, and W is a positive integer larger than 10.
For the first format, PUCCH resources occupied by legacy terminal equipment of LTE are indicated by an index of a first CCE (Control Channel Element) occupied by pdcch (physical Downlink Control Channel). In the above aspect, the first information helps the base station to select a frequency band with better transmission quality for the UE, and the second information helps avoid collision with the PUCCH signaling of the first format.
The band boundary is one of two boundaries of a system bandwidth that can be used to transmit the first format. As an embodiment, the first information is indicated by 1 information bit.
As one embodiment, the W is one of {32, 36 }.
As an embodiment, the first signaling is transmitted on PDCCH, and the channel elements are CCEs.
As an embodiment, the first signaling is transmitted on an ePDCCH, and the channel element is an eCCE.
As an embodiment, the first signaling is transmitted in a second time slot in one LTE subframe, a pattern of REs occupied by the first signaling in the LTE time slot is the same as a pattern of REs occupied by one PDCCH in the LTE time slot, and a pattern of REs occupied by the channel element in the LTE time slot is the same as a pattern of REs occupied by one CCE in the LTE time slot.
As an embodiment, the first signaling is transmitted in one LTE timeslot, and the REs occupied by the channel elements in the LTE timeslot include a first part and a second part, where the patterns of the REs occupied by the first part and the second part in the LTE timeslot are respectively the same as the patterns of the REs occupied by the two CCEs in the LTE timeslot.
Specifically, according to the above aspect of the present invention, the step C further includes the steps of:
-step C0. determining the transmission power of the uplink signaling to be a first power.
Wherein the first power varies linearly with a variation of a total offset value, the total offset value being a sum of the adjusted powers indicated by each of a set of target TPC commands (Command) including all TPC commands indicated by physical layer signaling received by the UE to the first signaling after a Reset (Reset).
The essence of the above aspect is that the adjustment power value indicated by the TPC command in the first signaling (the minimum scheduling unit is the LTE slot) and the adjustment power value indicated by the TPC command in the downlink DCI of the legacy (the minimum scheduling unit is the LTE subframe) can be superimposed.
As an embodiment, a linear slope of the first power to the total offset value is 1. As an example, the unit of the first power is dBm (decibels).
As an embodiment, the physical layer signaling includes signaling with a minimum scheduling unit being an LTE slot and signaling with a minimum scheduling unit being an LTE subframe.
In particular, according to the above aspect of the invention, it is characterized in that the first power is the transmission power of said given format determined according to the LTE scheme, except for the following modifications:
using the total offset value instead of g (i)
Add an additional offset of 3 dB.
The above aspects of the invention ensure that the BLER of the uplink signaling is not reduced compared to conventional PUCCH signaling.
The invention discloses a method in a base station supporting low-delay wireless communication, which comprises the following steps:
-step a. transmitting a first signaling, the first signaling scheduling the transmission of the N transport block groups
-step b. transmitting N transport block sets, said N transport block sets being transmitted in N LTE timeslots respectively
-step c, receiving N uplink signaling in N sub-resource groups, respectively, the N sub-resource groups being located in N subsequent LTE timeslots, respectively, the N uplink signaling indicating whether or not transport blocks in the N transport block groups are correctly received, respectively.
Wherein the first signaling is physical layer signaling, and N is a positive integer. One of the transport block groups includes G transport blocks, the G being a positive integer. One of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2. The given format is one of:
LTE PUCCH format {1, 1a, 1b })
LTE PUCCH format {2, 2a, 2b }.
LTE PUCCH Format 3
PUCCH formats for supporting more than 20 ACK/NACK bits.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. sending a second signaling indicating L candidate resources, said L being a positive integer.
Wherein the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
Specifically, according to one aspect of the present invention, the given format is a first format, the first signaling includes first information and second information, the first information indicates a band boundary corresponding to the N sub-resource groups, and the second information indicates an offset of an index of the first selected resource from an index of the first associated resource. The first associated resource is determined by an index of a first channel unit occupied by the first signaling, the first selected resource is composed of the N sub-resource groups, and the first associated resource comprises one sub-resource group at each frequency band boundary in the N subsequent LTE time slots. The RE occupied by the first signaling is composed of one or more channel units, wherein the channel units comprise W REs, and W is a positive integer larger than 10.
Specifically, according to an aspect of the present invention, the step C further includes the steps of:
-step C0. determining the transmission power of the uplink signaling to be a first power.
Wherein the first power varies linearly with a variation of a total offset value that is a sum of adjusted powers indicated by each of a set of target TPC commands (Command) that includes all TPC commands indicated by physical layer signaling that the UE receives after a reset until the first signaling.
In particular, according to the above aspect of the invention, it is characterized in that the first power is the transmission power of said given format determined according to the LTE scheme, except for the following modifications:
using the total offset value instead of g (i)
Add an additional offset of 3 dB.
The invention discloses a user equipment supporting low-delay wireless communication, which comprises the following modules:
a first module: for receiving a first signaling, which schedules the transmission of groups of N transmission blocks
A second module: for receiving N transport block groups, which are sent in N LTE slots, respectively
A third module: the N uplink signaling indicates whether the transport blocks in the N transport block groups are correctly received, where the N uplink signaling indicates that the transport blocks in the N transport block groups are correctly received.
Wherein the first signaling is physical layer signaling, and N is a positive integer. One of the transport block groups includes G transport blocks, the G being a positive integer. One of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2. The given format is one of:
LTE PUCCH format {1, 1a, 1b })
LTE PUCCH format {2, 2a, 2b }.
LTE PUCCH Format 3
PUCCH formats for supporting more than 20 ACK/NACK bits.
As an embodiment, the above user equipment is characterized in that the first module is further configured to receive a second signaling, where the second signaling indicates L candidate resources, and L is a positive integer. Wherein the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
As an embodiment, the user equipment as described above is characterized in that the given format is a first format, the first signaling includes first information and second information, the first information indicates a band boundary corresponding to the N sub-resource groups, and the second information indicates an offset of an index of the first selected resource from an index of the first associated resource. The first associated resource is determined by an index of a first channel unit occupied by the first signaling, the first selected resource is composed of the N sub-resource groups, and the first associated resource comprises one sub-resource group at each frequency band boundary in the N subsequent LTE time slots. The RE occupied by the first signaling is composed of one or more channel units, wherein the channel units comprise W REs, and W is a positive integer larger than 10.
As an embodiment, the user equipment is characterized in that the third module is further configured to determine that the transmission power of the uplink signaling is the first power. Wherein the first power varies linearly with a variation of a total offset value that is a sum of adjusted powers indicated by each of a set of target TPC commands (Command) that includes all TPC commands indicated by physical layer signaling that the UE receives after a reset until the first signaling. The first power is the transmit power of the given format determined according to the LTE scheme, except modified as follows:
using the total offset value instead of g (i)
Add an additional offset of 3 dB.
The invention discloses a base station device supporting low-delay wireless communication, which comprises the following modules:
a first module: for transmitting a first signaling, which schedules the transmission of groups of N transmission blocks
A second module: for transmitting N transport block groups, which are transmitted in N LTE slots, respectively
A third module: the N uplink signaling indicates whether the transport blocks in the N transport block groups are correctly received.
Wherein the first signaling is physical layer signaling, and N is a positive integer. One of the transport block groups includes G transport blocks, the G being a positive integer. One of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2. The given format is one of:
LTE PUCCH format {1, 1a, 1b })
LTE PUCCH format {2, 2a, 2b }.
LTE PUCCH Format 3
PUCCH formats for supporting more than 20 ACK/NACK bits.
As an embodiment, the above base station device is characterized in that the first module is further configured to send a second signaling, where the second signaling indicates L candidate resources, and L is a positive integer. Wherein the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
As an embodiment, the base station device is characterized in that the given format is a first format, the first signaling includes first information and second information, the first information indicates a band boundary corresponding to the N sub-resource groups, and the second information indicates an offset of an index of the first selected resource from an index of the first associated resource. The first associated resource is determined by an index of a first channel unit occupied by the first signaling, the first selected resource is composed of the N sub-resource groups, and the first associated resource comprises one sub-resource group at each frequency band boundary in the N subsequent LTE time slots. The RE occupied by the first signaling is composed of one or more channel units, wherein the channel units comprise W REs, and W is a positive integer larger than 10.
As an embodiment, the base station device is characterized in that the third module is further configured to determine that the transmission power of the uplink signaling is the first power. Wherein the first power varies linearly with a variation of a total offset value that is a sum of adjusted powers indicated by each of a set of target TPC commands (Command) that includes all TPC commands indicated by physical layer signaling that the UE receives after a reset until the first signaling. The first power is the transmit power of the given format determined according to the LTE scheme, except modified as follows:
using the total offset value instead of g (i)
Add an additional offset of 3 dB.
Compared with the prior art, the invention has the following technical advantages:
reduction of air-interface delay introduced by PUCCH
Compatible existing LTE devices to avoid collisions with legacy PUCCH signaling
Improving spectrum utilization efficiency while ensuring BLER for uplink signaling.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram of a downstream transmission according to an embodiment of the invention;
fig. 2 is a diagram illustrating that uplink signaling is located in a PUCCH region according to an embodiment of the present invention;
FIG. 3 shows a schematic diagram where the given format is a third format according to one embodiment of the invention;
FIG. 4 shows a schematic diagram of scheduling timing of first signaling according to one embodiment of the invention;
fig. 5 shows a transmission flow diagram of second signaling according to an embodiment of the invention;
fig. 6 shows a block diagram of a processing device in a UE according to an embodiment of the invention;
fig. 7 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 steps.
For theBase station N1In step S11, a first signaling is sent, the first signaling scheduling the transmission of the N transport block groups. In step S12, N transport block sets are transmitted, where the N transport block sets are transmitted in N LTE timeslots, respectively. It is determined in step S13 that the transmission power of the N uplink signaling is the first power. In step S14, N uplink signaling are received in the N sub-resource groups, where the N uplink signaling respectively indicate whether the transport blocks in the N transport block groups are correctly received.
For theUE U2In step S21, the first signaling is received. N transmission block groups are received in step S22. Determining the N upstream messages in step S23The transmission power of the order is the first power. In step S24, N uplink signaling messages are sent in the N subsets, respectively.
In embodiment 1, the first signaling is physical layer signaling, and N is a positive integer. The N sub-resource groups are respectively located in N subsequent LTE time slots. One of the transport block groups includes G transport blocks, the G being a positive integer. One of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2. The N subsequent LTE slots are after the N LTE slots, respectively. The given format is one of:
LTE PUCCH format {1, 1a, 1b })
LTE PUCCH format {2, 2a, 2b }.
LTE PUCCH Format 3
PUCCH formats for supporting more than 20 ACK/NACK bits.
As sub-embodiment 1 of embodiment 1, the N subsequent LTE slots are located in LTE subframe # i, and the first power is:
wherein, PCMAX,c(i) Is the maximum transmit power, P, of UE U2 on LTE subframe # i on the primary serving cell0_PUCCHAnd ΔF_PUCCH(F) Respectively a value, PL, configured by higher layer signallingcIs the path loss, h (n), measured by UE U2CQI,nHARQ,nSR) Is a value, Δ, associated with said given formatTxD(F') is a value related to the number of antenna ports transmitting the uplink signaling. PCMAX,c(i)，P0_PUCCH，ΔF_PUCCH(F)，PLc，h(nCQI,nHARQ,nSR)，ΔTxD(F') the detailed definition refers to TS 36.213. G (i) is the total offset value that is the sum of the adjusted powers indicated by each of the TPC commands in the target TPC command set that includes the UE truncating after reset (i.e., receiving Meg 2)Up to (including) all TPC commands received by the first signaling as indicated by the physical layer signaling.
As sub-embodiment 2 of embodiment 1, the N subsequent LTE slots are located in LTE subframe # i, and the first power is:
PPUCCH(i)＝min{PCMAX,c(i),P0_PUCCH+PLc+G(i)+3}[dBm]
wherein, PCMAX,c(i)，P0_PUCCH，PLcG (i) refer to the description in the above sub-embodiment 1, respectively.
The essence of the 2 sub-embodiments is: the first power is the transmit power of the given format determined according to the LTE scheme, except modified as follows:
using said total offset value G (i) instead of g (i)
Add an additional offset of 3 dB.
Example 2
Embodiment 2 illustrates a schematic diagram that uplink signaling is located in a PUCCH region, as shown in fig. 2. In fig. 2, the squares filled with black dots identify two PRBs forming one PUCCH region, where the two PRBs are located at two band boundaries of the current system bandwidth, and the two PRBs are located in a first slot and a second slot of an LTE subframe, respectively. The indices of the Z PRB pairs in the current system bandwidth are integers from 0 to Z-1, respectively.
In embodiment 2, N is 2, J is 1, and the N LTE slots are located in one LTE subframe.
As sub-embodiment 1 of the embodiment 2, a base station sends a second signaling to a UE, where the second signaling indicates L candidate resources, where L is 2. Wherein, the first signaling indicates the index of the first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups in the present invention, the second signaling is a high-level signaling, and the L candidate resources include:
the first candidate resource comprises a first sub-resource and a third sub-resource.
The second candidate resource comprises a second sub-resource and a fourth sub-resource.
As a sub-embodiment 2 of the embodiment 2, the given format in the present invention is a first format, the first signaling includes first information and second information, the first information indicates whether a band boundary corresponding to the N sub-resource groups in the present invention is an upper band boundary (near PRB # Z-1) or a lower band boundary (near PRB #0), and the second information indicates an offset of an index of the first selected resource from an index of the first associated resource. The first associated resource is determined by the index of the first channel unit occupied by the first signaling, and the first selected resource consists of the N sub-resource groups. The first associated resource includes a first sub-resource at an upper band boundary of the first slot, a second sub-resource at a lower band boundary of the first slot, a third sub-resource at an upper band boundary of the second slot, and a fourth sub-resource at a lower band boundary of the second slot. The first information and the second information together indicate the first selected resource.
As a sub-embodiment 3 of embodiment 2, the given format in the present invention is a first format, an index of a PRB corresponding to (i.e. occupied by) a first selected resource is less than or equal to a first index, or is greater than or equal to a second index, the first index is a maximum value of indexes of PRBs that can be used in the first format in a first slot of a target subframe, a sum of the second index and the first index is equal to a total number of PRBs in a system bandwidth minus 1, and the target subframe is a transmission subframe of the N uplink signaling. Detailed description of the first index refers to the maximum value of the variable m for PUCCH formats {1, 1a, 1b } in section 5.4.3 of TS 36.211.
As sub-embodiment 4 of the embodiment 2, the first sub-resource and the fourth sub-resource constitute a PUCCH resource of the first format, and the second sub-resource and the third sub-resource constitute a PUCCH resource of the first format. The essence of sub-embodiment 4 above is that the part of the PUCCH resource of one first format in two LTE slots can only be used at the same time, or at the same time avoid being used for transmitting HARQ-ACK for short TTIs. The above sub-embodiment 4 minimizes the collision of the sub-resources and the PUCCH resources in the present invention.
Example 3
Embodiment 3 illustrates a schematic diagram in which the given format is the third format, as shown in fig. 3. In fig. 3, the squares identified by bold lines are PRBs corresponding to candidate resources,
in embodiment 3, in the present invention, N is 1, J is 2, and the given format is a third format. And the base station sends a second signaling to the UE, wherein the second signaling indicates L candidate resources, and L is 2. The first signaling indicates the index of the first selected resource in the L candidate resources, the first selected resource consists of the N sub-resource groups in the invention, the second signaling is a high-level signaling, and the L candidate resources comprise { the first candidate resource, the second candidate resource, the third candidate resource and the fourth candidate resource }.
In embodiment 3, one of the candidate resources includes 2 sub-resources, and the 2 sub-resources respectively occupy two consecutive PRBs.
As sub-embodiment 1 of embodiment 3, the 2 sub-resources are respectively used for transmitting different information bits.
Example 4
Embodiment 4 illustrates a schematic diagram of scheduling timing of the first signaling, as shown in fig. 4. In fig. 4, a hatched square is a transmission slot of the first signaling.
In embodiment 4, the N timeslots in the present invention are 2 LTE timeslots located in the same LTE subframe, that is, the scheduling timing relationships between the first signaling and the N timeslots are respectively indicated by arrows a7 and A8.
The N subsequent LTE time slots in the present invention are respectively the D-th time slot after the N time slots. And D is a positive integer. That is, the scheduling timing relationships of the N uplink signaling in the present invention and the N transmission block groups in the present invention are respectively shown as arrows R7 and R8.
As sub-example 1 of example 4, the D is 4.
As sub-example 1 of example 4, the D is 6
Example 5
Embodiment 5 illustrates a transmission flow chart of the second signaling, as shown in fig. 5. In fig. 5, base station N3 is the serving cell maintaining base station for UE U4.
The base station N3 transmits the second signaling in step S30. The UE U4 receives second signaling indicating L candidate resources, the L being a positive integer, in step S40.
In embodiment 5, the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups in the present invention, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
As sub-embodiment 1 of embodiment 5, the second signaling indicates L resource indexes, and the L indexes correspond to the L candidate resources, respectively. The resource index is a non-negative integer.
Example 6
Embodiment 6 is a block diagram illustrating a processing apparatus in a UE, as shown in fig. 6. In fig. 6, the UE processing apparatus 200 mainly comprises a receiving module 201, a receiving module 202 and a transmitting module 203.
The receiving module 201 is configured to receive a first signaling, where the first signaling schedules transmission of the N transmission block groups. The receiving module 202 is configured to receive N transmission block groups, where the N transmission block groups are respectively sent in N LTE time slots. The sending module 203 is configured to send N uplink signaling in N sub-resource groups, where the N sub-resource groups are located in N subsequent LTE time slots, respectively, and the N uplink signaling indicates whether transmission blocks in the N transmission block groups are correctly received, respectively.
In embodiment 6, the first signaling is physical layer signaling, and N is a positive integer less than 3. One of the transport block groups includes G transport blocks, the G being a positive integer. One of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2. The given format is one of:
LTE PUCCH format {1, 1a, 1b })
LTE PUCCH Format 3
PUCCH formats for supporting more than 20 ACK/NACK bits.
As sub-embodiment 1 of embodiment 6, the first signaling is one of DCI formats {1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, 2D }.
As sub-embodiment 2 of embodiment 6, the REs occupied by the first signaling are composed of one or more channel units, where the channel unit includes W REs, and W is 36 for a normal CP (Cyclic Prefix) and 32 for an extended CP.
Example 7
Embodiment 7 is a block diagram illustrating a processing apparatus in a base station, as shown in fig. 7. In fig. 7, the base station processing apparatus 300 mainly comprises a transmitting module 301, a transmitting module 302 and a receiving module 303.
The sending module 301 is configured to send a first signaling, where the first signaling schedules sending of the N transmission block groups. The sending module 302 is configured to send N transmission block groups, where the N transmission block groups are sent in N LTE time slots, respectively. The receiving module 303 is configured to receive N uplink signaling in N sub-resource groups, where the N uplink signaling indicates whether a transmission block in the N transmission block groups is correctly received.
In embodiment 7, the first signaling is physical layer signaling, and N is a positive integer. One of the transport block groups includes G transport blocks, the G being a positive integer. One of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2. The given format is one of:
LTE PUCCH format {1, 1a, 1b })
LTE PUCCH Format 3
PUCCH formats for supporting more than 20 ACK/NACK bits.
As sub-embodiment 1 of embodiment 7, one of the uplink signaling includes G bits, and the G bits respectively indicate whether G transport blocks in a corresponding transport block group are correctly decoded.
As sub-embodiment 2 of embodiment 7, one of the uplink signaling includes 1 bit, where the 1 bit indicates whether all G transport blocks in a corresponding transport block group are correctly decoded.
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 mobile terminal in the present invention includes, but is not limited to, a mobile phone, a tablet computer, a notebook, a network card, a vehicle-mounted communication device, a wireless sensor, and other wireless communication devices. The base station in the present invention includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (20)
1. A method in a user equipment supporting low-delay wireless communication, comprising the steps of:
-step a. receiving a first signaling, the first signaling scheduling the transmission of the N transport block groups;
-step b. receiving N transport block sets, said N transport block sets being transmitted in N LTE time slots, respectively;
step c, sending N uplink signaling in N sub-resource groups, where the N sub-resource groups are located in N subsequent LTE timeslots, respectively, and the N uplink signaling indicates whether or not the transport blocks in the N transport block groups are correctly received, respectively;
the first signaling is physical layer signaling, the N is 2, and the N LTE time slots belong to one LTE subframe; one said transport block group comprises G transport blocks, said G being a positive integer; one of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2; the N uplink signalings can coexist with the given format in one physical resource block; the given format is a first format or a second format; the first format is LTE PUCCH format 1, or LTE PUCCH format 1a, or LTE PUCCH format 1 b; the second format is LTE PUCCH format 2, or LTE PUCCH format 2a, or LTE PUCCH format 2 b.
2. The method of claim 1, wherein step a further comprises the steps of:
-step A0. receiving second signaling indicating L candidate resources, said L being a positive integer;
wherein the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
3. The method of claim 1, wherein the given format is a first format, wherein the first signaling comprises first information and second information, wherein the first information indicates a band boundary corresponding to the N sub-resource groups, and wherein the second information indicates an offset of an index of a first selected resource from an index of a first associated resource; the first associated resource is determined by the index of a first channel unit occupied by a first signaling, the first selected resource consists of the N sub-resource groups, and the first associated resource comprises one sub-resource group on each frequency band boundary in the N subsequent LTE time slots respectively; the RE occupied by the first signaling is composed of one or more channel units, wherein the channel units comprise W REs, and W is a positive integer larger than 10.
4. The method according to any one of claims 1 to 3, wherein said step C further comprises the steps of:
-step C0. determining the transmission power of the uplink signaling to be a first power;
wherein the first power varies linearly with a variation of a total offset value, the total offset value being a sum of the adjusted powers indicated by each of a set of target TPC commands, the set of target TPC commands including all TPC commands indicated by physical layer signaling received by the UE to the first signaling after reset.
5. The method of claim 4, wherein the first power is a transmit power of the given format determined according to an LTE scheme, except modified as follows:
replacing g (i) with the total offset value;
add an additional offset of 3 dB.
6. A method in a base station supporting low-delay wireless communication, comprising the steps of:
-step a. transmitting a first signaling, the first signaling scheduling the transmission of the N transport block groups;
-step b. transmitting N transport block sets, said N transport block sets being transmitted in N LTE time slots, respectively;
-step c, receiving N uplink signaling in N sub-resource groups, the N sub-resource groups being located in N subsequent LTE timeslots, respectively, the N uplink signaling indicating whether transport blocks in the N transport block groups are correctly received, respectively;
the first signaling is physical layer signaling, the N is 2, and the N LTE time slots belong to one LTE subframe; one said transport block group comprises G transport blocks, said G being a positive integer; one of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2; the N uplink signalings can coexist with the given format in one physical resource block; the given format is a first format or a second format; the first format is LTE PUCCH format 1, or LTE PUCCH format 1a, or LTE PUCCH format 1 b; the second format is LTE PUCCH format 2, or LTE PUCCH format 2a, or LTE PUCCH format 2 b.
7. The method of claim 6, wherein step A further comprises the steps of:
-step A0. sending a second signaling indicating L candidate resources, said L being a positive integer;
wherein the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
8. The method of claim 6, wherein the given format is a first format, wherein the first signaling comprises first information and second information, wherein the first information indicates a band boundary corresponding to the N sub-resource groups, and wherein the second information indicates an offset of an index of a first selected resource from an index of a first associated resource; the first associated resource is determined by the index of a first channel unit occupied by a first signaling, the first selected resource consists of the N sub-resource groups, and the first associated resource comprises one sub-resource group on each frequency band boundary in the N subsequent LTE time slots respectively; the RE occupied by the first signaling is composed of one or more channel units, wherein the channel units comprise W REs, and W is a positive integer larger than 10.
9. The method according to any one of claims 6 to 8, wherein said step C further comprises the steps of:
-step C0. determining the transmission power of the uplink signaling to be a first power;
wherein the first power varies linearly with a variation of a total offset value, the total offset value being a sum of the adjusted powers indicated by each of a set of target TPC commands, the set of target TPC commands including all TPC commands indicated by physical layer signaling received by the UE to the first signaling after reset.
10. The method of claim 9, wherein the first power is a transmit power of the given format determined according to an LTE scheme, except modified as follows:
replacing g (i) with the total offset value;
add an additional offset of 3 dB.
11. A user equipment supporting low-delay wireless communication, comprising:
a first module: the first signaling is used for receiving the first signaling, and the first signaling schedules the transmission of the N transmission block groups;
a second module: the system comprises a receiver configured to receive N transmission block groups, wherein the N transmission block groups are respectively transmitted in N LTE time slots;
a third module: the system comprises N sub-resource groups and N uplink signaling groups, wherein the N sub-resource groups are respectively located in N subsequent LTE time slots, and the N uplink signaling groups respectively indicate whether transmission blocks in the N transmission block groups are correctly received;
the first signaling is physical layer signaling, the N is 2, and the N LTE time slots belong to one LTE subframe; one said transport block group comprises G transport blocks, said G being a positive integer; one of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2; the N uplink signalings can coexist with the given format in one physical resource block; the given format is a first format or a second format; the first format is LTE PUCCH format 1, or LTE PUCCH format 1a, or LTE PUCCH format 1 b; the second format is LTE PUCCH format 2, or LTE PUCCH format 2a, or LTE PUCCH format 2 b.
12. The user equipment supporting low latency wireless communications according to claim 11, wherein the first module further receives a second signaling indicating L candidate resources, wherein L is a positive integer;
wherein the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
13. The user equipment supporting low latency wireless communication of claim 11, wherein the given format is a first format, wherein the first signaling includes first information indicating band boundaries corresponding to the N sets of sub-resources and second information indicating an offset of an index of a first selected resource from an index of a first associated resource; the first associated resource is determined by the index of a first channel unit occupied by a first signaling, the first selected resource consists of the N sub-resource groups, and the first associated resource comprises one sub-resource group on each frequency band boundary in the N subsequent LTE time slots respectively; the RE occupied by the first signaling is composed of one or more channel units, wherein the channel units comprise W REs, and W is a positive integer larger than 10.
14. The UE of any one of claims 11 to 13, wherein the third module further determines the transmission power of the uplink signaling to be a first power;
wherein the first power varies linearly with a variation of a total offset value, the total offset value being a sum of the adjusted powers indicated by each of a set of target TPC commands, the set of target TPC commands including all TPC commands indicated by physical layer signaling received by the UE to the first signaling after reset.
15. A user equipment supporting low delay wireless communication according to claim 14, characterized in that the first power is the transmission power of the given format determined according to the LTE scheme, except for the following modifications:
replacing g (i) with the total offset value;
add an additional offset of 3 dB.
16. A base station device supporting low-delay wireless communication, comprising:
a first module: the first signaling is used for sending the first signaling, and the first signaling schedules the sending of the N transmission block groups;
a second module: the system comprises a transmitter, a receiver and a transmitter, wherein the transmitter is used for transmitting N transmission block groups, and the N transmission block groups are respectively transmitted in N LTE time slots;
a third module: the system comprises a plurality of transmission block groups, a plurality of uplink signaling groups and a plurality of sub-resource groups, wherein the transmission block groups are used for receiving N uplink signaling in the N sub-resource groups respectively, and the N uplink signaling indicates whether transmission blocks in the N transmission block groups are correctly received or not respectively;
the first signaling is physical layer signaling, the N is 2, and the N LTE time slots belong to one LTE subframe; one said transport block group comprises G transport blocks, said G being a positive integer; one of the sets of sub-resources comprises J sub-resources, the format of one of the sub-resources is a part of a given format within one LTE slot, and J is 1 or 2; the N uplink signalings can coexist with the given format in one physical resource block; the given format is a first format or a second format; the first format is LTE PUCCH format 1, or LTE PUCCH format 1a, or LTE PUCCH format 1 b; the second format is LTE PUCCH format 2, or LTE PUCCH format 2a, or LTE PUCCH format 2 b.
17. The base station device supporting low latency wireless communications of claim 16, wherein the first module further transmits second signaling indicating L candidate resources, wherein L is a positive integer;
wherein the first signaling indicates an index of a first selected resource in the L candidate resources, the first selected resource is composed of the N sub-resource groups, the second signaling is a high-level signaling, and one candidate resource includes one sub-resource group in each of the N subsequent LTE timeslots.
18. The base station device supporting low-latency wireless communication according to claim 16, wherein the given format is a first format, the first signaling includes first information and second information, the first information indicates a band boundary corresponding to the N sets of sub-resources, and the second information indicates an offset of an index of a first selected resource from an index of a first associated resource; the first associated resource is determined by the index of a first channel unit occupied by a first signaling, the first selected resource consists of the N sub-resource groups, and the first associated resource comprises one sub-resource group on each frequency band boundary in the N subsequent LTE time slots respectively; the RE occupied by the first signaling is composed of one or more channel units, wherein the channel units comprise W REs, and W is a positive integer larger than 10.
19. The base station device supporting low latency wireless communication according to any one of claims 16 to 18, wherein the third module further determines the transmission power of the uplink signaling to be a first power;
wherein the first power varies linearly with a variation of a total offset value, the total offset value being a sum of the adjusted powers indicated by each of a set of target TPC commands, the set of target TPC commands including all TPC commands indicated by physical layer signaling received by the UE to the first signaling after reset.
20. The base station apparatus supporting low-latency wireless communication according to claim 19, wherein the first power is a transmission power of the given format determined according to an LTE scheme, except for a modification:
replacing g (i) with the total offset value;
add an additional offset of 3 dB.
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| WO2018195679A1 (en) * | 2017-04-27 | 2018-11-01 | 南通朗恒通信技术有限公司 | Method and device for wireless communication in user equipment and base station |
| CN108809543B (en) * | 2017-05-05 | 2021-12-31 | 华为技术有限公司 | Method and device for transmitting data |
| CN111585737A (en) * | 2017-05-08 | 2020-08-25 | 上海朗帛通信技术有限公司 | Method and device for wireless communication in base station and user equipment |
| CN110365438B (en) * | 2018-03-26 | 2021-05-11 | 华为技术有限公司 | Signal transmission method, related equipment and system |
| CN112187424B (en) * | 2019-07-04 | 2023-02-03 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN115190634A (en) * | 2019-10-17 | 2022-10-14 | 上海朗帛通信技术有限公司 | Method and device used in node of wireless communication |
| CN112713971A (en) * | 2019-10-24 | 2021-04-27 | 中国电信股份有限公司 | Base station, uplink control signaling resource allocation method thereof and communication system |
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| CN103973397B (en) * | 2013-01-29 | 2019-01-08 | 中兴通讯股份有限公司 | Sending and receiving method, base station and the terminal of ACK/NACK information |
| CN104767595A (en) * | 2014-01-07 | 2015-07-08 | 中兴通讯股份有限公司 | HARQ-ACK (Hybrid Automatic Repeated Request Acknowledge) feedback information transmission method, system, terminal and base station |
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| CN101489255A (en) * | 2009-01-09 | 2009-07-22 | 中兴通讯股份有限公司 | Sending method, apparatus and system for uplink control channel |
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