CN107231687B - Narrow-band communication method and device of cellular network - Google Patents
Narrow-band communication method and device of cellular network Download PDFInfo
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- CN107231687B CN107231687B CN201610171083.XA CN201610171083A CN107231687B CN 107231687 B CN107231687 B CN 107231687B CN 201610171083 A CN201610171083 A CN 201610171083A CN 107231687 B CN107231687 B CN 107231687B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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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
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The invention discloses a narrow-band communication method and a narrow-band communication device for a cellular network. As an embodiment, the UE first transmits the first information and then transmits the first wireless signal. Wherein the first information is used to determine a first subframe space comprising one or more subframe sets consisting of Q of the subframe subsets consisting of P subframes, P being a positive integer greater than 1, Q being a positive integer. The first wireless signal is transmitted in a set of subframes. The invention reduces the empty resource occupied by the first information, reduces the time domain resource reserved for the timing adjustment amount and improves the transmission efficiency. In addition, when the timing adjustment amount is greater than the duration of 1 SC-FDMA, the invention avoids abandoning the D2D transmission, further improving the transmission efficiency.
Description
Technical Field
The present invention relates to a transmission scheme for wireless communication, and more particularly, to a method and apparatus for supporting D2D (Device to Device) wireless communication.
Background
In a conventional 3GPP-3rd Generation Partner Project (3GPP-3rd Generation Partner Project) system, data transmission occurs between a base station and User Equipment (UE-User Equipment). In 3GPP R (Release) 12, D2D was established and discussed, and an essential feature of D2D is to allow data transmission between UEs (User Equipment). In 3GPP R13, eD2D (Enhancements to LTE Device to Device) was established, and its main feature is to introduce UE Relay (Relay) function.
In 3GPP RAN (Radio Access Network ) #69 times congress, NB-IOT (narrow band Internet of Things) was established. NB-IOT supports 3 different modes of operation (RP-151621):
1. stand-alone (Stand-alone) operation, deployed on the spectrum used by GERAN systems.
2. Guard band operation on LTE (Long Term Evolution) carriers
Unused resource block on guard band deployment
3. In-band operation, deployment on resource blocks on LTE carriers
Further, at 3GPP RAN #71 congress (RP-160655), FeD2D (Further Enhancements of LTE D2D) for IoT and wearable devices is established. In FeD2D, D2D communication may be achieved over an NB-IoT like air interface.
In LTE D2D and eD2D, scheduling of time domain resources is in a basic unit of subframe. Furthermore, each D2D transmission avoids using the last SC-FDMA (Single-carrier Frequency-Division multiple access) symbol in the LTE subframe. The last SC-FDMA symbol is reserved for a potential time adjustment (Timing Adjust account) needed for uplink transmission.
Disclosure of Invention
The inventor finds, through research, that in the IoT-specific FeD2D, the bandwidth occupied by D2D communication is narrow, and accordingly, the time domain resource occupied by one D2D transmission may be larger than one subframe. Therefore, the scheduling of time domain resources in the basic unit of subframe is not applicable to the FeD2D, and a new solution needs to be proposed. Further, since the scheme of reserving the last SC-FDMA symbol in the subframe causes a reduction in transmission efficiency, an optimized scheme needs to be proposed.
The present invention provides a solution to the above problems. It should be noted that the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict. For example, embodiments and features in embodiments in a UE (User Equipment) of the present application may be applied in a base station and vice versa. Also for example, embodiments and features in embodiments in D2D transmitting UEs of the present application may be applied to D2D receiving UEs, and vice versa. Further, while the motivation of the present application is for narrowband transmission, the present application is still applicable to wideband transmission.
The invention discloses a method for supporting device-to-device UE, which comprises the following steps:
-step a. transmitting first information, the first information being used for determining a first subframe space
-step b.
Wherein the first subframe space comprises one or more subframe sets consisting of Q of the subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer. The first wireless signal is transmitted in a set of subframes.
In the above method, the basic time unit scheduled by the first information is the subframe set, i.e. Q subframe subsets. The method saves the empty resource occupied by the first information.
As one embodiment, the target recipient of the first wireless signal is a terminal.
As an embodiment, the first information is indicated by physical layer signaling.
As an embodiment the first information is indicated by higher layer signaling.
As an embodiment, the first Information is indicated by SCI (side-by-side Control Information).
As an embodiment, the first information is indicated by the Time resource pattern field in SCI 0 (i.e. the bits corresponding to the Time resource pattern field are redefined).
As one embodiment, the first Information is indicated by DCI (Dynamic Control Information).
As an embodiment, the first information is indicated by DCI format 5.
As an embodiment, the first wireless signal corresponds to one transmission of one transport block.
As an embodiment, the first wireless signal corresponds to a multiple Repetition (Repetition) transmission of one transport block. As a sub-embodiment, the time domain resources occupied by the multiple repeated transmissions of the one transport block are consecutive.
As an embodiment, Q is 1, and the first wireless signal corresponds to a part of one transmission of one transport block (i.e. one transmission of the one transport block occupies a plurality of the subframe sets).
As an embodiment, the P subframes are consecutive in the time domain.
As an embodiment, the subframes of the Q subsets of subframes are consecutive in time domain.
As an embodiment, the first radio signal does not occupy more than 180kHz (kilohertz) at any time.
As an embodiment, the wireless signal for indicating the first information occupies a bandwidth of not more than 180kHz at any time.
As an embodiment, the transmission channel corresponding to the first wireless signal is SL-SCH (Sidelink shared channel).
For one embodiment, the first wireless signal is transmitted on a physical layer control channel.
As an example, the first radio signal is transmitted on a psch (Physical sidelink Shared Channel).
As an embodiment, the first radio signal is transmitted on a PSCCH (Physical sidelink control channel).
As one embodiment, P is an even number.
As one example, P is a positive integer power of 2.
As one embodiment, Q is an even number.
As one embodiment, Q is a positive integer power of 2.
As an embodiment, the product of P and Q is an even number.
As an embodiment, the product of P and Q is a positive integer power of 2.
As one example, P is a constant.
As one example, Q is a constant.
As an embodiment, in the earliest subframe of the occupied subset of subframes, the UE assumes that it (i.e., the UE) is not scheduled (by the base station) to transmit uplink wireless signals in the occupied subset of subframes.
As an embodiment, once the first wireless signal starts to be transmitted in the occupied sub-frame subset, the UE assumes that it (i.e., the UE) is not scheduled (by the base station) to transmit uplink wireless signals in the occupied sub-frame subset.
In the conventional LTE scheme, the priority of uplink transmission is higher than that of D2D transmission, while in the FeD2D, uplink transmission in one subframe may cause failure of D2D transmission in one subframe subset (for Single-Tone transmission, for example), and therefore, the conventional scheme may cause significant reduction in transmission efficiency. Both of the above embodiments avoid the UE dropping (Drop) D2D transmissions for uplink transmissions.
Specifically, according to an aspect of the present invention, characterized in that the first information is a first bit map, the first bit map is composed of V1 bits, and the V1 is a positive integer. For a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space. The i is the remainder of the j divided by the V1 plus 1. And sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
As an example, if the ith bit in the first bitmap is 1, the given set of subframes belongs to the first subframe space; the given set of subframes does not belong to the first subframe space if the ith bit in the first bitmap is 0.
As an example, the subframe set is a PSCCH interval (period).
As an example, the subframe group is a pool of subframes reserved for pschs in a PSCCH interval (period).
As an embodiment, the subframe group is composed of a part of subframes in a PSCCH interval (period) reserved for a PSCCH in a subframe pool.
As an embodiment, the subframe group includes all subframes except the first T subframes in a PSCCH interval (period), where T is a positive integer. As a sub-embodiment, the first T subframes are reserved for PSCCH. As a sub-embodiment, the T is the length of the bitmap saSubframeBitmap indicated by the PSCCH resource configuration. As a sub-embodiment, the T is the number of bits in the subframeBitmap-r12 field.
As an embodiment, the subframe group is configured by downlink higher layer signaling.
As an embodiment, the subframe group is determined by the UE itself.
As an embodiment, the subframe groups are configured by Sidelink (Sidelink) high layer signaling.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-step A0. sending second information indicating that the second information and at least one of the bandwidth occupied by the first wireless signal, { the P, the Q } are related.
As an embodiment, the above aspect saves air interface overhead for configuring the P and the Q.
As one embodiment, the second information indicates a number of subcarriers occupied by the first wireless signal.
As an embodiment, the P is implicitly indicated by the second information.
As one embodiment, Q is mapped one-to-one with P.
For one embodiment, if the second information indicates the first bandwidth and P is P1; if the second information indicates the second bandwidth and the P is P2. The P1 is greater than the P2 and the first bandwidth is less than the second bandwidth. As a sub-embodiment, the first bandwidth is 2.5kHz and the second bandwidth is one of {15kHz, 45kHz, 90kHz, 180kHz }. As a sub-embodiment, the first bandwidth is 15kHz and the second bandwidth is one of {45kHz, 90kHz, 180kHz }.
The above embodiments avoid over-designed TBSs (Transport Block Size).
As an embodiment, the second information is indicated by physical layer signaling.
As an embodiment, the first information and the second information are indicated by the same SCI.
For one embodiment, the first information and the second information are indicated by SCI 0.
As one example, the second information is indicated by the Resource block assignment and hopping Resource assignment field in SCI 0 (i.e., the corresponding bits of the Resource block assignment and hopping Resource assignment field are redefined).
In particular, according to one aspect of the invention, it is characterized in that for a subframe occupied (by the first radio signal), the time occupied by the first radio signal does not include the duration of the last multicarrier symbol in the occupied subframe if the occupied subframe is the last subframe in the subset of subframes. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
Compared with the traditional D2D/eD2D, the method has the advantages that the reserved multi-carrier symbols are as few as possible, and therefore the transmission efficiency is higher. In addition, in the above aspect, the first radio signal is fixed to avoid occupying the duration of the last multicarrier symbol in the last subframe of the subframe subset, so that no additional signaling configuration is required, and air interface overhead is reduced.
As an embodiment, a Puncturing (Puncturing) manner is applied to a resource mapping of the first wireless signal to avoid occupying a duration of a last multicarrier symbol in a last subframe of the subset of subframes.
As an embodiment, Q is 1. In this embodiment, the subframe set is the subframe subset. That is, the basic time unit scheduled by the first information and the puncturing period are consistent. The embodiment is particularly suitable for scenes with wide bandwidth occupied by the first wireless signal.
As one embodiment, Q is greater than 1. In this embodiment, the subframe set includes a plurality of the subframe subsets. I.e. the basic time unit scheduled by the first information is larger than the period of puncturing. The embodiment is particularly suitable for the scene with narrow bandwidth occupied by the first wireless signal.
As an embodiment, once the first wireless signal starts to be transmitted in the occupied sub-frame subset, the UE assumes that it (i.e., the UE) is not scheduled (by the base station) to transmit uplink wireless signals in the occupied sub-frame subset.
As one embodiment, the multicarrier symbols are SC-FDMA symbols.
As one embodiment, the multicarrier symbol is an OFDM symbol.
As one embodiment, the multicarrier symbol is a SCMA symbol.
As an example, the duration of the last multicarrier symbol is 2192Ts, which is 1/30720 milliseconds.
As an example, the duration of the last multicarrier symbol is 2208Ts, which is 1/30720 milliseconds.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-a step a1. sending the third information.
Wherein a time occupied by the first wireless signal in a last subframe of the subset of subframes is related to third information.
As an embodiment, the time occupied by the first radio signal in the last subframe of the subset of subframes does not comprise the duration of the last L multicarrier symbols, L being a positive integer. The third information indicates the L. As a sub-embodiment, the L is implicitly configured by a Timing advance command (Timing advance command) that indicates an amount of Timing Adjustment (amplitude). The timing adjustment is less than the duration of the L multicarrier symbols and greater than or equal to the duration of the L-1 multicarrier symbols.
For D2D/eD2D, when the timing adjustment is greater than the duration of one SC-FDMA symbol, the D2D transmission in the corresponding subframe is dropped. In the above embodiment, the period of the time-domain puncturing is a sub-frame subset, and the first radio signal can bear more puncturing (puncturing) on the time-domain resources based on the receivable decoding performance. The above aspect avoids giving up D2D transmission, improving transmission efficiency.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-step a2. sending the fourth information.
Wherein the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of { the P, the Q, the group of subframes }.
As an embodiment, the fourth Information is indicated by an IE (Information Element) in the format of SL-TF-ResourceConfig-r 12.
As an embodiment, the fourth information includes all or part of information in the SL-commresource pool.
As an embodiment, the fourth information includes the P.
As one embodiment, the fourth information includes the Q.
As an embodiment, there is at least one given subframe, a first subframe preceding the given subframe and a second subframe following the given subframe, the first subframe and the second subframe belonging to the group of subframes, the given subframe not belonging to the group of subframes.
When the P is too large, the above embodiment can ensure that the UE obtains an uplink transmission opportunity.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-a step a3. receiving a downlink signaling group.
Wherein the downlink signaling group indicates at least one of { the first information, the second information, the third information, and the fourth information }. The downlink signaling group comprises at least one of { K1 physical layer signaling, K2 upper layer signaling }. The K1 and the K2 are each positive integers.
As one embodiment, the physical layer signaling is DCI.
As an embodiment, the upper layer signaling is RRC (Radio Resource Control) signaling or MAC (Medium Access Control) layer signaling.
As an example, the K1 is 1.
As an example, the K2 is 1.
As one example, the K2 is greater than 1.
The invention discloses a method for supporting device-to-device UE, which comprises the following steps:
-step a. receiving first information, the first information being used for determining a first subframe space
-step b.
Wherein the first subframe space comprises one or more subframe sets consisting of Q of the subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer. The first wireless signal is transmitted in a set of subframes. The sender of the first wireless signal is a terminal.
Specifically, according to an aspect of the present invention, characterized in that the first information is a first bit map, the first bit map is composed of V1 bits, and the V1 is a positive integer. For a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space. The i is the remainder of the j divided by the V1 plus 1. And sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
Specifically, according to an aspect of the present invention, the step a further includes at least one of the following { step a0, step a1, step a2 }:
-step A0. receiving second information indicating that the second information and at least one of the bandwidth occupied by the first wireless signal, { the P, the Q } are related.
-a step a1. receiving third information. Wherein a time occupied by the first wireless signal in a last subframe of the subset of subframes is related to third information.
-a step a2. receiving fourth information. Wherein the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of { the P, the Q, the group of subframes }.
In particular, according to one aspect of the invention, it is characterized in that for an occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first radio signal does not include the duration of the last multicarrier symbol in the occupied subframe. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
The invention discloses a method for supporting a device-to-device base station, which comprises the following steps:
-step a. transmitting first information, the first information being used for determining a first subframe space
Wherein the first subframe space comprises one or more subframe sets consisting of Q of the subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer. The first wireless signal is transmitted in one set of subframes, and the sender of the first wireless signal is a terminal.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
a step a3. sending a downlink signaling group.
Wherein the downlink signaling group indicates at least one of { the first information, the second information, the third information, and the fourth information }. The downlink signaling group comprises at least one of { K1 physical layer signaling, K2 upper layer signaling }. The K1 and the K2 are each positive integers. Wherein the second information indicates a bandwidth occupied by the first wireless signal, the second information and at least one of { the P, the Q } are related; the time occupied by the first wireless signal in the last subframe of the subset of subframes is related to third information; the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of { the P, the Q, the group of subframes }.
Specifically, according to an aspect of the present invention, characterized in that the first information is a first bit map, the first bit map is composed of V1 bits, and the V1 is a positive integer. For a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space. The i is the remainder of the j divided by the V1 plus 1. And sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
In particular, according to one aspect of the invention, it is characterized in that for an occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first radio signal does not include the duration of the last multicarrier symbol in the occupied subframe. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
The invention discloses a user equipment supporting device-to-device, which comprises the following modules:
a first sending module: for transmitting first information used for determining a first subframe space
A second sending module: for transmitting a first wireless signal.
Wherein the first subframe space comprises one or more subframe sets consisting of Q of the subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer. The first wireless signal is transmitted in a set of subframes.
As an embodiment, the above user equipment is characterized in that, for an occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first radio signal does not include the duration of the last multicarrier symbol in the occupied subframe. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
As an embodiment, the above user equipment is characterized in that the first information is a first bit map, the first bit map consists of V1 bits, and the V1 is a positive integer. For a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space. The i is the remainder of the j divided by the V1 plus 1. And sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
As an embodiment, the above user equipment is characterized in that the first sending module is further configured to at least one of:
sending second information indicating that the second information and at least one of the bandwidth occupied by the first wireless signal, { the P, the Q } are related.
Sending the third message. Wherein a time occupied by the first wireless signal in a last subframe of the subset of subframes is related to third information.
Sending the fourth message. Wherein the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of { the P, the Q, the group of subframes }.
Receiving a downlink signaling group. Wherein the downlink signaling group indicates at least one of { the first information, the second information, the third information, and the fourth information }. The downlink signaling group comprises at least one of { K1 physical layer signaling, K2 upper layer signaling }. The K1 and the K2 are each positive integers.
As an embodiment, the user equipment further includes:
a first receiving module: for receiving a downlink signaling group.
Wherein the downlink signaling group indicates at least one of { the first information, the second information, the third information, and the fourth information }. The downlink signaling group comprises at least one of { K1 physical layer signaling, K2 upper layer signaling }. The K1 and the K2 are each positive integers.
The invention discloses a user equipment supporting device-to-device, which comprises the following modules:
a second receiving module: for receiving first information used for determining a first subframe space
A third receiving module: for receiving a first wireless signal.
Wherein the first subframe space comprises one or more subframe sets consisting of Q of the subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer. The first wireless signal is transmitted in a set of subframes. The sender of the first wireless signal is a terminal.
As an embodiment, the above user equipment is characterized in that, for an occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first radio signal does not include the duration of the last multicarrier symbol in the occupied subframe. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
As an embodiment, the above user equipment is characterized in that the first information is a first bit map, the first bit map consists of V1 bits, and the V1 is a positive integer. For a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space. The i is the remainder of the j divided by the V1 plus 1. And sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
As an embodiment, the above user equipment is characterized in that the second receiving module is further configured to at least one of:
receiving second information indicating that the second information and at least one of the bandwidth occupied by the first wireless signal, { the P, the Q } are related.
Receiving third information, and determining the time occupied by the first wireless signal in the last subframe of the subset of subframes according to the third information.
Receiving fourth information, determining at least one of { said P, said Q, said group of subframes } based on said fourth information. Wherein the fourth information is indicated by higher layer signaling.
The invention discloses a base station device for supporting device-to-device, which comprises the following modules:
a third sending module: for transmitting first information used for determining a first subframe space
Wherein the first subframe space comprises one or more subframe sets consisting of Q of the subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer. The first wireless signal is transmitted in one set of subframes, and the sender of the first wireless signal is a terminal.
As an embodiment, the base station device is characterized in that, for an occupied subframe, if the occupied subframe is the last subframe in the subframe subset, the time occupied by the first wireless signal does not include the duration of the last multicarrier symbol in the occupied subframe. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
As an embodiment, the base station apparatus is characterized in that the first information is a first bit map, the first bit map is composed of V1 bits, and V1 is a positive integer. For a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space. The i is the remainder of the j divided by the V1 plus 1. And sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
As an embodiment, the base station device is characterized in that the second sending module is further configured to send a downlink signaling group. Wherein the downlink signaling group indicates at least one of { the first information, the second information, the third information, and the fourth information }. The downlink signaling group comprises at least one of { K1 physical layer signaling, K2 upper layer signaling }. The K1 and the K2 are each positive integers. Wherein the second information indicates a bandwidth occupied by the first wireless signal, the second information and at least one of { the P, the Q } are related; the time occupied by the first wireless signal in the last subframe of the subset of subframes is related to third information; the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of { the P, the Q, the group of subframes }.
Compared with the prior art, the invention has the following technical advantages:
saving the air interface resources occupied by the first information
Reducing the time domain resources reserved for timing adjustments and improving transmission efficiency
When the timing adjustment is greater than the duration of 1 SC-FDMA, the D2D transmission is avoided from being abandoned, and the transmission efficiency is improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram of D2D communication according to one embodiment of the invention;
FIG. 2 illustrates a flow diagram of scheduling information transmission according to one embodiment of the present invention;
FIG. 3 shows a schematic diagram of second information according to an embodiment of the invention;
FIG. 4 shows a schematic diagram of a group of subframes according to an embodiment of the invention;
FIG. 5 is a diagram illustrating the discontinuity of two adjacent sets of subframes according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a set of frames according to an example embodiment of the invention;
FIG. 7 is a diagram illustrating a subset of frames in accordance with an example embodiment of the present invention;
fig. 8 shows a block diagram of a processing device in a UE according to an embodiment of the invention;
fig. 9 shows a block diagram of a processing device in a UE according to yet another embodiment of the present invention;
fig. 10 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
For theBase station N1In step S10, a downlink signaling group is sent.
For theUE U2Receiving the downlink signaling group in step S20; transmitting first information, which is used to determine a first subframe space, in step S21; transmitting the first in step S22A wireless signal.
For theUE U3The first information is received in step S31, and the first subframe space is determined according to configuration information including the first information. The first wireless signal is received in step S32.
In embodiment 1, the first subframe space comprises a plurality of subframe sets, the subframe sets are composed of Q subframe subsets, the subframe subsets are composed of P subframes, P is a positive integer greater than 1, and Q is a positive integer. The first wireless signal is transmitted in a set of subframes. The downlink signaling group comprises at least one of { K1 physical layer signaling, K2 upper layer signaling }. The K1 and the K2 are each positive integers. The downlink signaling group includes the first information.
As sub-embodiment 1 of embodiment 1, the first information received by the UE U2 is indicated by one physical layer signaling in the downlink signaling group.
As sub-embodiment 2 of embodiment 1, said first information sent by UE U2 is indicated by the SCI.
As sub-embodiment 3 of embodiment 1, the first information is a first bit map consisting of V1 bits b0b1…bV1-1Composition, the V1 is a positive integer. Bit b in the first bitmap for a given set of subframes with index value j in one subframe groupjmodV1Indicating whether the given set of subframes belongs to the first subframe space. The jmod V1 is the remainder of the division of j by the V1. The index values of the subframe sets in the subframe group are sequentially as follows according to the time sequence: 012 ….
As sub-embodiment 4 of embodiment 1, the subframe group is a subframe pool reserved for pschs in a PSCCH interval.
Example 2
For UE U2, the scheduling information is sent in step S210. For UE U3, the scheduling information is received in step S310.
In embodiment 2, the scheduling information includes at least one of { second information, third information, fourth information }. Wherein the second information indicates that at least one of the bandwidth occupied by the first wireless signal, { the P, the Q } and the bandwidth occupied by the first wireless signal are related; the time occupied by the first wireless signal in the last subframe of the subset of subframes is related to third information; the fourth information is indicated by higher layer signaling (i.e., upper layer signaling), and the fourth information is used to determine at least one of { the P, the Q, the subframe group }.
As sub-embodiment 1 of embodiment 2, the UE U2 receives a downlink signaling group, where the downlink signaling group indicates the scheduling information. The downlink signaling group comprises at least one of { K1 physical layer signaling, K2 upper layer signaling }. The K1 and the K2 are each positive integers. The downlink signaling group includes the first information.
As a sub-embodiment of sub-embodiment 1 of embodiment 2, the second information is indicated by physical layer signaling in the downlink signaling group. The second information is indicated by a higher layer signaling in the downlink signaling group.
As a sub-embodiment 2 of the embodiment 2, the transmission channel corresponding to the first radio signal is SL-SCH, the subframe group is composed of subframes excluding the first T subframes in the PSCCH interval, and T is a positive integer. The fourth information includes { subframe related information of a start of the PSCCH interval, a number of subframes in the PSCCH interval, related information of the T }.
As sub-embodiment 3 of embodiment 2, the transmission channel corresponding to the first wireless signal is SL-SCH, and the subframe group is composed of a set of subframes excluding the first T subframes in the PSCCH interval. The fourth information includes { subframe related information of a start of the PSCCH interval, a number of subframes in the PSCCH interval, related information of the T }.
As an embodiment, the starting subframe related information of the subframe group is a remainder of a subframe index of a starting subframe of the subframe group divided by the number of subframes in the subframe group. The subframe index is relative to subframe #0 in a radio Frame corresponding to SFN (System Frame Number) 0, or the subframe index is relative to subframe #0 in a radio Frame corresponding to DFN (Direct Frame Number) 0.
Example 3
In embodiment 3, the second information indicates a bandwidth occupied by the first wireless signal. The number P of subframes in the subframe subset and the number Q of subframe subsets in the subframe set are mapped to the bandwidth occupied by the first wireless signal one by one.
As sub-embodiment 1 of embodiment 3, the second information indicates the number of subcarriers occupied by the first wireless signal, and the bandwidth occupied by the first wireless signal is equal to the subcarrier spacing multiplied by the number of subcarriers occupied by the first wireless signal. The subcarrier spacing is predefined, or fixed, or configured by higher layer signaling.
Example 4
In embodiment 4, one subframe group is composed of a plurality of consecutive subframe sets.
As sub-embodiment 1 of embodiment 4, the subframe group belongs to one PSCCH interval. The PSCCH interval comprises a pool of subframes reserved for PSCCH at the head, as identified by the double-headed arrow R1.
As sub-embodiment 2 of embodiment 4, the group of subframes belongs to one PSCCH interval. The PSCCH interval includes a pool of subframes reserved for the PSCCH at the head and the remaining subframe(s) at the tail, as identified by the double-headed arrow R2. The number of the remaining subframes is less than the number of subframes in one subframe set. Sub-embodiment 2 of said embodiment 4 is applicable to a scenario where the psch sub-frame pool cannot be split into a positive integer number of said sub-frame sets. The advantage of sub-embodiment 2 of said embodiment 4 is that the FeD2D can reuse the existing D2D design as much as possible, maintaining good compatibility.
Example 5
Embodiment 5 illustrates a schematic diagram in which two adjacent subframe sets are not continuous, as shown in fig. 5. In fig. 5, bold line squares identify the set of subframes, and cross-line filled squares identify the subframe(s) outside the group of subframes.
In embodiment 5, the subframe set # 1 and the subframe set # 2 belong to the same subframe group, and the subframes identified by the cross lines do not belong to the same subframe group.
As sub-embodiment 1 of embodiment 5, the subframe identified by the cross line is an uplink subframe.
As sub-embodiment 2 of embodiment 5, the position of the cross-line identified sub-frame is configurable.
As sub-embodiment 3 of embodiment 5, the position of the cross-line identified sub-frame is default (i.e. no explicit configuration of signalling is required).
Example 6
Embodiment 6 illustrates a schematic diagram of a subframe set, as shown in fig. 6. In fig. 6, bold squares identify the subset of subframes, and squares filled with slashes identify time domain resources not occupied by the first wireless signal.
In embodiment 6, the subframe subset # {0, 1, …, Q-1} constitutes one subframe set. The first wireless signal is transmitted in the set of subframes. The time domain resources occupied by the first wireless signal in the last subframe of each subset of subframes do not include the duration of the last L SC-FDMA symbols. And L is a positive integer.
As sub-embodiment 1 of embodiment 6, the L is related to a timing advance command received by the UE for transmission of the first radio signal.
As sub-example 2 of example 6, the L is fixed to 1.
Example 7
Embodiment 7 illustrates a schematic diagram of a sub-frame subset, as shown in fig. 7. In fig. 7, bold line squares identify time domain resources occupied by the first wireless signal, and squares filled with slash lines identify time domain resources not occupied by the first wireless signal.
In embodiment 7, subframe # {0, 1, …, P-1} constitutes a subset of subframes. The duration of the last L multicarrier symbols in subframe # (P-1) is not occupied by the first wireless signal. And L is a positive integer.
Example 8
The first receiving module 201 is configured to receive a downlink signaling group; the first sending module 202 is configured to send first information, where the first information is used to determine a first subframe space; the second sending module 203 is configured to send the first wireless signal.
In embodiment 8, the first subframe space comprises one or more subframe sets, the subframe sets are composed of Q subframe subsets, the subframe subsets are composed of P subframes, P is a positive integer greater than 1, and Q is a positive integer. The first wireless signal is transmitted in a set of subframes. The downlink signaling group indicates the first information. The downlink signaling group includes K1 physical layer signaling. The K1 is a positive integer.
As sub-embodiment 1 of embodiment 8, for an occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first wireless signal does not include the duration of the last multicarrier symbol in the occupied subframe. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
As sub embodiment 2 of embodiment 8, the first transmitting module 202 is further configured to:
sending second information indicating that the second information and at least one of the bandwidth occupied by the first wireless signal, { the P, the Q } are related.
Sending the fourth message. Wherein the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of { the P, the Q, the group of subframes }.
Wherein the downlink signaling group indicates { the second information, the fourth information }. The downlink signaling group further comprises K2 upper layer signaling. The K2 is a positive integer. The K1 is 1, i.e. the first information and the second information are indicated by one physical layer signaling.
Example 9
Embodiment 9 is a block diagram illustrating a processing apparatus in a UE, as shown in fig. 9. In fig. 9, the UE processing apparatus 300 mainly comprises a second receiving module 301 and a third receiving module 302.
The second receiving module 301 is configured to receive first information, which is used to determine a first subframe space. The third receiving module 302 is configured to receive the first wireless signal.
In embodiment 9, the first subframe space comprises one or more subframe sets, the subframe sets are composed of Q subframe subsets, the subframe subsets are composed of P subframes, P is a positive integer greater than 1, and Q is a positive integer. The first wireless signal is transmitted in a set of subframes. The sender of the first wireless signal is a terminal. For each occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first wireless signal does not include the duration of the last multicarrier symbol in the occupied subframe. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
As sub-embodiment 1 of embodiment 9, the first information is indicated by X bits indicating the first bitmap. The first bitmap consists of V1 bits, the V1 being a positive integer. For a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space. The i is the remainder of the j divided by the V1 plus 1. And sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0. As an embodiment, X is 8, and V1 is one of {6, 7, 8 }.
As sub-embodiment 2 of embodiment 9, the transport channel corresponding to the first radio signal is an SL-SCH.
Example 10
Embodiment 10 is a block diagram illustrating a processing apparatus in a base station, as shown in fig. 10. In fig. 10, the base station processing apparatus 400 mainly includes a third sending module 401.
The third sending module 401 is configured to send the first information, which is used to determine the first subframe space
In embodiment 10, the first subframe space comprises one or more subframe sets, the subframe sets are composed of Q subframe subsets, the subframe subsets are composed of P subframes, P is a positive integer greater than 1, and Q is a positive integer. The first wireless signal is transmitted in one set of subframes, and the sender of the first wireless signal is a terminal. The first information is carried by physical layer signaling.
As sub-embodiment 1 of embodiment 10, for each subframe occupied by the first wireless signal, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first wireless signal does not include the duration of the last multicarrier symbol in the occupied subframe. If the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
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 and the terminal in the present invention include, but are not limited to, a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted Communication device, a wireless sensor, a network card, an internet of things terminal, an RFID terminal, an NB-IOT terminal, an MTC (Machine Type Communication) terminal, an eMTC (enhanced MTC) terminal, a data card, a network card, a vehicle-mounted Communication device, a low-cost mobile phone, a low-cost tablet computer, 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 (22)
1. A method in a UE supporting device-to-device, comprising the steps of:
-step a. transmitting first information, the first information being used for determining a first subframe space;
-step b. transmitting a first wireless signal;
wherein the first subframe space comprises one or more subframe sets consisting of Q subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer; the first wireless signal is transmitted in one set of subframes; the step A also comprises the following steps:
-a step a2. sending fourth information;
wherein the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of the P, the Q.
2. The method of claim 1, wherein the first information is a first bitmap, the first bitmap consists of V1 bits, the V1 is a positive integer; for a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space; the i is the remainder of the j divided by the V1 plus 1; and sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
3. The method of claim 1, wherein step a further comprises the steps of:
-step A0. sending second information indicating the bandwidth occupied by said first wireless signal; the second information and at least one of the P, the Q are related.
4. The method of claim 2, wherein step a further comprises the steps of:
-step A0. sending second information indicating the bandwidth occupied by said first wireless signal; the second information and at least one of the P, the Q are related.
5. The method according to any of claims 1 to 4, characterized in that for an occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first radio signal does not comprise the duration of the last multicarrier symbol in the occupied subframe; if the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
6. The method according to claim 1 or 2, wherein said step a further comprises the steps of:
-a step a1. sending a third message;
wherein a time occupied by the first wireless signal in a last subframe of the subset of subframes is related to third information.
7. The method according to claim 3 or 4, wherein the step A further comprises the steps of:
-a step a1. sending a third message;
wherein a time occupied by the first wireless signal in a last subframe of the subset of subframes is related to third information.
8. The method of claim 7, wherein step a further comprises the steps of:
-a step a3. receiving a downlink signaling group;
wherein the downlink signaling group indicates at least one of the first information, the second information, the third information, and the fourth information; the downlink signaling group comprises at least one of K1 physical layer signaling and K2 upper layer signaling; the K1 and the K2 are each positive integers.
9. A method in a UE supporting device-to-device, comprising the steps of:
-step a. receiving first information, the first information being used for determining a first subframe space;
-step b. receiving a first wireless signal;
wherein the first subframe space comprises one or more subframe sets consisting of Q subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer; the first wireless signal is transmitted in one set of subframes; the sender of the first wireless signal is a terminal; the step A also comprises a step A2:
-a step a2. receiving fourth information; wherein the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of the P, the Q.
10. The method of claim 9, wherein the first information is a first bitmap, the first bitmap consists of V1 bits, the V1 is a positive integer; for a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space; the i is the remainder of the j divided by the V1 plus 1; and sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
11. The method according to claim 9 or 10, wherein said step a further comprises at least one of the following steps a0, step a 1:
-step A0. receiving second information indicating a bandwidth occupied by said first wireless signal, at least one of said P, said Q and said second information being related;
-a step a1. receiving third information; wherein a time occupied by the first wireless signal in a last subframe of the subset of subframes is related to third information.
12. A method according to claim 9 or 10, characterized in that for an occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first radio signal does not comprise the duration of the last multicarrier symbol in the occupied subframe; if the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
13. The method of claim 11, wherein for an occupied subframe, if the occupied subframe is a last subframe in the subset of subframes, the time occupied by the first wireless signal does not include a duration of a last multicarrier symbol in the occupied subframe; if the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
14. A method in a base station supporting device-to-device, comprising the steps of:
-step a. transmitting first information, the first information being used for determining a first subframe space;
wherein the first subframe space comprises one or more subframe sets consisting of Q subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer; transmitting a first wireless signal in a set of subframes, a sender of the first wireless signal being a terminal; the step A also comprises the following steps:
a step a3 of sending a downlink signaling group;
wherein the downlink signaling group indicates at least one of the first information, the second information, the third information and the fourth information; the downlink signaling group comprises at least one of K1 physical layer signaling and K2 upper layer signaling; the K1 and the K2 are each positive integers; wherein the second information indicates a bandwidth occupied by the first wireless signal, at least one of the P, the Q and the second information being related; the time occupied by the first wireless signal in the last subframe of the subset of subframes is related to third information; the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of the P, the Q.
15. The method of claim 14, wherein the first information is a first bitmap, the first bitmap consists of V1 bits, the V1 is a positive integer; for a given set of subframes with index value j in one subframe group, the ith bit in the first bitmap indicates whether the given set of subframes belongs to the first subframe space; the i is the remainder of the j divided by the V1 plus 1; and sequentially increasing the index values of the subframe sets in the subframe group by 1 according to the time sequence, wherein the index value of the first subframe set in the subframe group is 0.
16. A method according to claim 14 or 15, characterized in that for an occupied subframe, if the occupied subframe is the last subframe in the subset of subframes, the time occupied by the first radio signal does not comprise the duration of the last multicarrier symbol in the occupied subframe; if the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
17. A device-to-device enabled user equipment, comprising:
a first sending module: for transmitting fourth information and first information, the first information being used for determining a first subframe space;
a second sending module: for transmitting a first wireless signal;
wherein the first subframe space comprises one or more subframe sets consisting of Q subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer; the first wireless signal is transmitted in one set of subframes; the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of the P, the Q.
18. The UE of claim 17, wherein for an occupied subframe, if the occupied subframe is a last subframe in the subset of subframes, the time occupied by the first radio signal does not include a duration of a last multicarrier symbol in the occupied subframe; if the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
19. A device-to-device enabled user equipment, comprising:
a second receiving module: for receiving fourth information and first information, the first information being used to determine a first subframe space;
a third receiving module: for receiving a first wireless signal;
wherein the first subframe space comprises one or more subframe sets consisting of Q subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer; the first wireless signal is transmitted in one set of subframes; the sender of the first wireless signal is a terminal; the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of the P, the Q.
20. The UE of claim 19, wherein for an occupied subframe, if the occupied subframe is a last subframe in the subset of subframes, the time occupied by the first radio signal does not include a duration of a last multicarrier symbol in the occupied subframe; if the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
21. A base station apparatus supporting device-to-device, comprising:
a third sending module: the downlink signaling group and the first information are sent, and the first information is used for determining a first subframe space; wherein the first subframe space comprises one or more subframe sets consisting of Q subframe subsets consisting of P subframes, P being a positive integer greater than 1, and Q being a positive integer; transmitting a first wireless signal in a set of subframes, a sender of the first wireless signal being a terminal; the downlink signaling group indicates at least one of the first information, the second information, the third information and the fourth information; the downlink signaling group comprises at least one of K1 physical layer signaling and K2 upper layer signaling; the K1 and the K2 are each positive integers; wherein the second information indicates a bandwidth occupied by the first wireless signal, at least one of the P, the Q and the second information being related; the time occupied by the first wireless signal in the last subframe of the subset of subframes is related to third information; the fourth information is indicated by higher layer signaling, the fourth information being used to determine at least one of the P, the Q.
22. The base station device of claim 21, wherein for an occupied subframe, if the occupied subframe is a last subframe in the subset of subframes, the time occupied by the first wireless signal does not include a duration of a last multicarrier symbol in the occupied subframe; if the occupied sub-frame is a sub-frame other than the last sub-frame in the sub-frame subset, the time occupied by the first wireless signal includes a duration of the last multicarrier symbol in the occupied sub-frame.
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| CN110166198B (en) * | 2018-02-12 | 2024-07-02 | 北京三星通信技术研究有限公司 | Bypass signal transmission method and apparatus |
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