WO2017186014A1

WO2017186014A1 - Method and device for wireless communication-related ue unit and base station

Info

Publication number: WO2017186014A1
Application number: PCT/CN2017/080764
Authority: WO
Inventors: 张晓博
Original assignee: 上海朗帛通信技术有限公司
Priority date: 2016-04-28
Filing date: 2017-04-17
Publication date: 2017-11-02
Also published as: CN107343316A

Abstract

Disclosed in the present invention are a method and device for a wireless communication-related UE unit and base station. In one embodiment, a base station performs blind detection in L1 time-frequency resources, and receives K1 wireless signals. The K1 wireless signals are sent respectively by K1 terminals, L1 is a positive integer, and K1 is a non-negative integer. The wireless signals carry {uplink information, scheduling marker}, and the scheduling marker is used to determine whether the corresponding terminal requests for continued scheduling. The present invention reduces probability of uplink collision, and prevents resource waste caused by idling.

Description

Method and device in UE and base station in wireless communication

Technical field

The present invention relates to a transmission scheme for wireless signals in a wireless communication system, and more particularly to a method and apparatus for uplink transmission based on cellular network communication.

Background technique

In a conventional digital modulation-based wireless communication system, such as a 3GPP (3rd Generation Partner Project) cellular system, uplink wireless signal transmission is based on base station scheduling. For the next generation of wireless communication systems, IoT (Internet of Things) communication may become an important application scenario.

The characteristics of IoT communication include: the number of terminal devices is very large, the standby time supported by the terminal device is long (low power consumption), and the cost of the terminal device is low. Traditional scheduling-based uplink transmission is no longer applicable to IoT, for the following reasons:

- The signaling required for downlink scheduling can severely reduce transmission efficiency. In particular, it is considered that the number of information bits included in the uplink transmission of a typical primary IoT is usually small.

- Increase the power consumption of the terminal device and reduce the standby time. In the existing system, the terminal device first transmits signaling such as an SR (Scheduling Request) before transmitting the uplink transmission.

-. Increased uplink transmission delay. In some special scenarios, IoT communication requires a lower transmission delay, and existing scheduling-based uplink transmissions cannot meet this requirement.

In response to the above problem, CB (Contention Based) uplink transmission is proposed, that is, the UE does not need the scheduling of the base station to transmit uplink information. If no collision occurs (between two or more UEs), the base station can correctly decode the uplink information.

Summary of the invention

The inventors found through research that the base station needs to reserve corresponding time-frequency resources for CB uplink transmission. However, since the base station is not sure of the size of the time-frequency resource required for the uplink information of the real transmission, it is impossible to reserve a time-frequency resource of a suitable size.

Further, when two or more UEs (User Equipments) send When the uplink signals collide, the base station cannot decode correctly, which reduces the transmission efficiency. Especially when the number of UEs is very large, the probability of collisions increases significantly.

In response to the above problems, the present invention provides a solution. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be combined with each other arbitrarily. For example, features in embodiments and embodiments in the UE of the present application may be applied to a base station, and vice versa.

The invention discloses a method in a base station for wireless communication, which comprises the following steps:

- Step A. Perform blind detection in L1 time-frequency resources and receive K1 wireless signals.

The K1 wireless signals are respectively sent by K1 terminals, the L1 is a positive integer, and the K1 is a non-negative integer. The wireless signal carries {uplink information, scheduling flag}, and the scheduling flag is used to determine whether the corresponding terminal requests to be scheduled to continue.

In the above method, the scheduling flag can assist the base station to predict the size of the time-frequency resource reserved for the next CB uplink transmission.

The difference between the above method and the SR in the existing method is that the UE directly transmits the uplink information without waiting for the base station to reply to the scheduling flag. The above method reduces the transmission delay and reduces the air interface overhead of scheduling signaling.

As an embodiment, the physical layer channel corresponding to the uplink information is a PUSCH (Physical Uplink Shared Channel).

As an embodiment, the transport channel corresponding to the uplink information is a UL-SCH (UpLink Shared Channel).

As an embodiment, the uplink information and the scheduling flag are transmitted on the same physical layer channel.

As an embodiment, the MCS (Modulation and Coding Status) of the wireless signal is configured by higher layer signaling.

As an embodiment, the scheduling flag is composed of 1 information bit, and the scheduling flag indicates whether the corresponding terminal (ie, the sender of the scheduling flag) requests to be scheduled to continue.

As an embodiment, the scheduling flag includes 2 information bits. The scheduling flag indicates whether the corresponding terminal requests to be scheduled to continue. If the scheduling flag indicates that the corresponding terminal request is to be scheduled to continue, the scheduling flag is also used for the number of time-frequency resources requested by the corresponding terminal.

As an embodiment, the K1 is a positive integer.

As an embodiment, the time-frequency resource is located in one subframe in the time domain.

As an embodiment, the time-frequency resource has a duration in the time domain of less than 1 millisecond.

As an embodiment, the K1 is 0, and the base station determines, in step A, that the terminal does not send the wireless signal in the L1 time-frequency resources according to the blind detection.

As an embodiment, the L1 is equal to one.

As an embodiment, the L1 is greater than one.

As an embodiment, the time-frequency resource includes a positive integer number of RUs (Resource Units).

As an embodiment, the uplink information includes at least one of {uplink data, UCI (Uplink Control Information). As a sub-embodiment, the uplink data corresponds to one TB (Transport Block).

As an embodiment, the L1 is greater than 1, and the number of RUs included in any two of the L1 time-frequency resources is equal.

As an embodiment, the foregoing RU occupies one subcarrier bandwidth in the frequency domain and occupies a duration of one multicarrier symbol in the time domain. As a sub-embodiment, the multi-carrier symbol is an OFDM symbol. As a sub-embodiment, the multi-carrier symbol is an SC-FDMA symbol. As a sub-embodiment, the multi-carrier symbol is an FBMC (Filter Bank Multi Carrier) symbol. As a sub-embodiment, the subcarrier bandwidth is one of {15 kHz (kilohertz), 17.5 kHz, 17.06 kHz, 7.5 kHz, 2.5 kHz}.

As an embodiment, one of the wireless signals is transmitted in one of the time-frequency resources.

Specifically, according to an aspect of the invention, the method is characterized in that the step A further comprises the following steps:

- Step A0. Send the first signaling.

The first signaling is physical layer signaling, and the first signaling can be used by the terminal in the first terminal group to determine the L1 time-frequency resources. The first terminal group includes G terminals. The K1 terminals all belong to the first terminal group. The G is a positive integer greater than 1, and the K1 is not greater than the G.

As an embodiment, the first signaling indicates the L1 time-frequency resources.

In the foregoing embodiment, the base station does not determine how many terminals in the first terminal group perform uplink in the L1 time-frequency resources, although the base station sends the first signaling to indicate the L1 time-frequency resources. transmission. The K1 radio signals are still determined by the blind detection.

In the above aspect, the base station can dynamically reserve air interface resources for the uplink transmission of the first terminal group by using the first signaling, thereby reducing the chance of uplink transmission conflicts on the one hand, and avoiding wasting excessive air interface resources on the other hand.

As an embodiment, the first terminal group includes all target UEs in a target cell coverage, the target cell is a transmitting cell of the first signaling, and the target UE is a method supporting the method of the present invention. UE.

As an embodiment, the first terminal group includes a target UE in a part of a target cell coverage, the target cell is a transmitting cell of the first signaling, and the target UE is a method supporting the method of the present invention. UE.

As an embodiment, some terminals in the first terminal group determine the L1 time-frequency resources according to the first signaling, and the remaining terminals do not detect the first signaling.

As an embodiment, the first signaling is DCI (Downlink Control Information).

As an embodiment, the first signaling is associated with an index of the first terminal group, and an index of the first terminal group is an integer.

As an embodiment, when the first signaling is sent, the base station does not determine how many terminals in the first terminal group send wireless signals in the L1 time-frequency resources.

As an embodiment, each terminal in the first terminal group corresponds to a feature sequence, and the feature sequence is used to determine whether the corresponding terminal sends a wireless signal in the L1 time-frequency resources.

As a sub-embodiment, the wireless signal includes the sequence of features corresponding to a sender of the wireless signal.

As a sub-embodiment, one of the wireless signals is transmitted in one of the time-frequency resources.

As a sub-embodiment, the sequence of features sent by any two terminals in the first terminal group is orthogonal or pseudo-orthogonal.

As a sub-embodiment, the feature sequence is a pseudo-random sequence.

As a sub-embodiment, the sequence of features is used to estimate upstream channel parameters.

As a sub-embodiment, the blind detection is coherent detection for a corresponding feature sequence.

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

- Step A10. Send G configuration information.

The configuration information includes at least the latter of the {first index, the second index}, and the G pieces of configuration information are respectively allocated to the G terminals. The first terminal group includes the G terminals. The first index of the G pieces of configuration information is the same, and the second index of any two of the G pieces of configuration information is different.

As an embodiment, the configuration information is used to identify a corresponding terminal.

In the existing system, the terminal is assigned an RNTI (Radio Network Temporary Identifier) as an identifier.

In the above aspect, one terminal is configured with two levels of identifiers, that is, the first index and the second index, wherein the first index is used to identify an associated terminal group, and the second index is used for the terminal. The identifier in the associated terminal group.

As an embodiment, the first index is a non-negative integer and the second index is a non-negative integer less than G.

As an embodiment, the first index is used to identify the first terminal group.

As an embodiment, the configuration information is indicated by higher layer signaling.

As an embodiment, the configuration information is indicated by RRC (Radio Resource Control) layer signaling.

As an embodiment, the first signaling is identified by the first index.

In the foregoing embodiment, the terminals in the first terminal group share the same physical layer signaling, which reduces the overhead of the air interface resource and improves the transmission efficiency.

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

- Step B. Send the second signalling.

The second signaling includes G information bits, and K1 information bits of the G information bits are used to determine whether the uplink information in the K1 wireless signals is correctly decoded. The other information bits of the G information bits indicate that the information is not correctly decoded.

In the above aspect, even if some of the terminals in the first terminal group do not perform uplink transmission, corresponding information bits are reserved in the second signaling. The above aspect avoids the problem of downlink HARQ-ACK confusion caused by the base station missing the radio signal.

As an embodiment, the positions of the K1 information bits in the G information bits are respectively determined by the second index to which the K1 terminals are allocated.

As an embodiment, the uplink information corresponds to one bit block.

As a sub-embodiment, the bit block includes a plurality of information bits.

As a sub-embodiment, the bit block is a transport block.

As a sub-embodiment, the bit block is an input bit sequence of a channel encoder.

- Step C. Determine L2 and send the third signaling. The scheduling flag in the K1 wireless signals is used to determine the L2, and the third signaling can be used by a terminal in the first terminal group to determine the L2 time-frequency resources.

- Step D. Perform blind detection in L2 time-frequency resources and receive K2 of the wireless signals.

The third signaling is physical layer signaling, and the first terminal group includes G terminals. The K2 wireless signals are respectively transmitted by K2 terminals, the L2 is a positive integer, and the K2 is a non-negative integer. The K1 terminals belong to the first terminal group, and the K2 terminals belong to the first terminal group. The G is a positive integer greater than 1, and the K2 is not greater than the G.

In the above aspect, the base station determines the L2 by using information including K1 scheduling flags, where the K1 scheduling flags are respectively carried by the K1 wireless signals. The above aspect enables the base station to reserve an appropriate number of time-frequency resources in the step C - that is, to select the appropriate L2. That is to avoid the waste of resources and reduce the possibility of conflict.

Specifically, according to an aspect of the present invention, one of the wireless signals includes a positive integer number of modulation symbols, and one of the modulation symbols corresponds to one or more information bits. One of the modulation symbols is mapped to Q RUs by a spreading sequence that occupies one subcarrier bandwidth in the frequency domain and occupies one OFDM symbol duration in the time domain.

In the above aspect, the wireless signal adopts a multiple access mode similar to LDS-CDMA (Low-Density Signature CDMA), which can alleviate the uplink conflict to some extent.

As an embodiment, one of the modulation symbols is generated by modulation of one or more information bits in a block of bits.

As an embodiment, the spreading sequence corresponding to any two terminals in the first terminal group is orthogonal or pseudo-orthogonal.

In one embodiment, the uplink information is carried by one or more of the modulation symbols, and the scheduling flag is carried by one or more of the modulation symbols.

As an embodiment, the extension sequence corresponding to any two terminals in the first terminal group is related to the second index to which the corresponding terminal is allocated.

As an embodiment, the spreading sequence is a Zadoff-Chu sequence.

As an embodiment, the spreading sequence is a pseudo-random sequence.

Specifically, according to an aspect of the present invention, the blind detection in the step A is used to determine at least one of {the K1, K1 second indexes}, the K1 The two indexes respectively correspond to the configuration information assigned to the K1 terminals.

As an embodiment, the blind detection in the step D is used to determine at least one of {the K2, K2 UE identifiers}, the K2 UE identifiers and the K2 terminals are in one-to-one correspondence .

As an embodiment, the UE identity is an RNTI. As an embodiment, the UE identifier is an index of the corresponding terminal in the first terminal group.

In one embodiment, the L1 is greater than 1, and one of the wireless signals is transmitted in one of the time-frequency resources, and the blind detection is further used to determine the time-frequency resource occupied by the wireless signal.

The invention discloses a method in a UE for wireless communication, which comprises the following steps:

- Step A. Send a wireless signal.

The wireless signal is transmitted in a target time-frequency resource, and the target time-frequency resource is one of L1 time-frequency resources, and the wireless signal carries {uplink information, scheduling flag}, and the scheduling flag is used. It is determined whether the UE requests to be scheduled to continue.

As an embodiment, the scheduling flag indicates whether the UE has uplink information to be sent.

As an embodiment, if the UE wishes to be scheduled to continue, the scheduling flag is state 1, otherwise the scheduling flag is state 0.

- Step A0. Receive the first signaling.

The first signaling is physical layer signaling, and the first signaling can be used by the terminal in the first terminal group to determine L1 time-frequency resources. The first terminal group includes G terminals. The UE belongs to the first terminal group.

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

- Step A10. Receive configuration information.

The configuration information includes at least the latter of {first index, second index}. The first signaling is identified by the first index.

As an embodiment, the time-frequency resource occupied by the first signaling and the first index are related.

As an embodiment, the CRC (Cyclic Redundancy Check) corresponding to the first signaling is related to the first index.

As an embodiment, the scrambling code sequence used by the CRC corresponding to the first signaling is related to the first index.

Step A1. Select the target time-frequency resource from the L1 time-frequency resources.

As an embodiment, the step A1 is related (ie, the UE selects the target time-frequency resource by itself).

As an embodiment, in the step A1, the second index is used to determine the target time-frequency resource.

- Step B. Receive second signaling.

The second signaling includes G information bits, and one of the G information bits is used to determine whether the uplink information in the wireless signal is correctly decoded.

As an embodiment, the second index is used to determine the location of the 1 information bit in the G information bits.

As an embodiment, the extended sequence is associated with the second index.

Specifically, according to an aspect of the present invention, in the step A, the sending of the wireless signal is determined by the UE.

As an embodiment, the step A further includes the following steps:

Step A2. Determine to transmit the wireless signal in the target time domain resource. At least one of {the state of the buffer of the UE, the current service type of the UE} is used to determine the target time domain resource, and the target time-frequency resource occupies the target in the time domain Domain resource.

The invention discloses a base station device for wireless communication, which comprises the following modules:

The first processing module is configured to perform blind detection in the L1 time-frequency resources and receive K1 wireless signals.

As an embodiment, the first processing module is further configured to: send the first signaling. The first signaling is physical layer signaling, and the first signaling can be used by the terminal in the first terminal group to determine the L1 time-frequency resources. The first terminal group includes G terminals. The K1 terminals all belong to the first terminal group. The G is a positive integer greater than 1, and the K1 is not greater than the G.

As an embodiment, the foregoing base station device further includes: a first sending module: configured to send the second signaling. The second signaling includes G information bits, and K1 information bits of the G information bits are used to determine whether the uplink information in the K1 wireless signals is correctly decoded. The other information bits of the G information bits indicate that the information is not correctly decoded.

As an embodiment, the first processing module is further configured to: send G configuration information. The configuration information includes at least the latter of the {first index, the second index}, and the G pieces of configuration information are respectively allocated to the G terminals. The first terminal group includes the G terminals. The first index of the G pieces of configuration information is the same, and the second index of any two of the G pieces of configuration information is different.

As an embodiment, the first processing module is further configured to:

- Determine L2 and send the third signaling. The scheduling flag in the K1 wireless signals is used to determine the L2, and the third signaling can be used by a terminal in the first terminal group to determine the L2 time-frequency resources.

- Perform blind detection in L2 time-frequency resources, and receive K2 of the wireless signals.

The invention discloses a user equipment for wireless communication, which comprises the following modules:

The second processing module is configured to send a wireless signal.

In an embodiment, the second processing module is further configured to: receive the first signaling. The first signaling is physical layer signaling, and the first signaling can be used by the terminal in the first terminal group to determine L1 time-frequency resources. The first terminal group includes G terminals. The UE belongs to the first terminal group.

As an embodiment, the second processing module is further configured to: receive configuration information. The configuration information includes at least the latter of {first index, second index}. The first signaling is identified by the first index.

As an embodiment, the second processing module in the user equipment is used for at least one of the following:

- Receive the first signaling. The first signaling is physical layer signaling, and the first signaling can be used by the terminal in the first terminal group to determine L1 time-frequency resources. The first terminal group includes G terminals. The UE belongs to the first terminal group.

Selecting the target time-frequency resource from the L1 time-frequency resources.

As an embodiment, the foregoing user equipment further includes: a first receiving module: configured to receive the second signaling. The second signaling includes G information bits, and one of the G information bits is used to determine whether the uplink information in the wireless signal is correctly decoded.

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

- Based on the scheduling flag, the base station can reserve an appropriate number of time-frequency resources for uplink transmission. On the one hand, it reduces the possibility of uplink conflicts, on the other hand, it avoids waste of resources due to vacancy (unoccupied).

-. The physical layer signaling based on the terminal group can effectively avoid the spectrum efficiency reduction caused by excessive downlink scheduling.

- Two-level terminal index can reduce complexity and improve transmission efficiency.

DRAWINGS

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

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

2 shows a flow chart of reserving time-frequency resources based on scheduling flags, in accordance with one embodiment of the present invention;

3 shows a schematic diagram of multiple time-frequency resources in accordance with one embodiment of the present invention;

4 shows a schematic diagram of a time-frequency resource in accordance with one embodiment of the present invention;

FIG. 5 is a block diagram showing the structure of a processing device in a base station according to an embodiment of the present invention; FIG.

FIG. 6 is a block diagram showing the structure of a processing device in a UE according to an embodiment of the present invention; FIG.

detailed description

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

Example 1

Embodiment 1 illustrates a flow chart of uplink transmission, as shown in FIG. In Fig. 1, a base station N1 is a maintenance base station of a serving cell of UE U2. The steps in block F1, block F2, block F3 and block F4 are optional, respectively.

For the base station N1 , G configuration information is transmitted in step S10; first signaling is transmitted in step S11; blind detection is performed in L1 time-frequency resources in step S12, K1 wireless signals are received; and transmitted in step S13 Second signaling.

For the UE U2 , the target configuration information is received in step S20, the target configuration information is one of the G configuration information; the first signaling is received in step S21; and from the L1 time-frequency resources in step S220 Selecting a target time-frequency resource; transmitting a target wireless signal in the target time-frequency resource in step S22; receiving the first signaling in step S23.

In Embodiment 1, the K1 wireless signals are respectively transmitted by K1 terminals, the UE U2 is one of the K1 terminals, and the target wireless signal is one of the K1 wireless signals, and the L1 is positive. An integer, the K1 being a positive integer greater than one. The wireless signal carries {uplink information, scheduling flag}, and the scheduling flag is used to determine whether the corresponding terminal requests to be scheduled to continue. The configuration information includes at least the latter of {first index, second index}, and the G pieces of configuration information are respectively allocated to G terminals. The first terminal group includes the G terminals. The first index of the G pieces of configuration information is the same, and the second index of any two of the G pieces of configuration information is different. The first signaling is physical layer signaling, and the first signaling can be used by a terminal in the first terminal group to determine the L1 time-frequency resources. The K1 terminals all belong to the first terminal group. The G is a positive integer greater than 1, and the K1 is not greater than the G. The second signaling includes G information bits, and K1 information bits of the G information bits are used to determine whether the uplink information in the K1 wireless signals is correctly decoded. The other information bits of the G information bits indicate that the information is not correctly decoded.

As a sub-embodiment 1 of Embodiment 1, the target information bits of the G information bits indicate whether the target wireless signal is correctly decoded, and the location of the target information bits in the G information bits is determined by the UE. U2 is assigned a second index determination.

As a sub-embodiment 2 of the first embodiment, the second indexes to which the G terminals are allocated are 0, 1, ..., G-1, respectively. The G information bits are sequentially from the MSB (Most Significant Bit) to the LSB (Least Significant Bit) for the terminal whose second index is 0, 1, ..., G-1.

As sub-embodiment 3 of Embodiment 1, the second signaling is physical layer signaling.

As sub-embodiment 4 of embodiment 1, the second signaling is DCI.

As a sub-embodiment 5 of the first embodiment, the indexes of the L1 time-frequency resources are sequentially {#0, #1, . . . , #(L1-1)}, and the second indexes of the G terminals are respectively allocated. It is 0, 1, ..., G-1, where the second index of UE U2 is X. The index of the target time-frequency resource is: X mod L1, that is, the remainder obtained by dividing X by L1.

As a sub-embodiment 6 of Embodiment 1, the K wireless signals respectively include K feature sequences, and any two of the K feature sequences are orthogonal or low-correlated. The G Each terminal corresponds to G feature sequences. The blind detection is for the G feature sequences and the K feature sequences are detected.

As sub-embodiment 7 of embodiment 1, the first signaling is identified by the first index.

Example 2

Embodiment 2 illustrates a flow chart for reserving time-frequency resources based on scheduling flags, as shown in FIG. In Fig. 2, the base station N1 is a maintenance base station of the serving cell of the UE U3.

For the base station N1 , L2 is determined and the third signaling is transmitted in step S14; blind detection is performed in the L2 time-frequency resources in step S15, and K2 of the wireless signals are received.

For UE U3 , the third signaling is received in step S34; a wireless signal is transmitted in step S35.

In Embodiment 2, the scheduling flag in the K1 radio signals in Embodiment 1 is used to determine the L2, and the third signaling can be used in the terminal in the first terminal group in Embodiment 1. And used to determine the L2 time-frequency resources. The third signaling is physical layer signaling. The K2 wireless signals are respectively transmitted by K2 terminals, and the UE U3 is one of the K2 terminals. The L2 is a positive integer and the K2 is a non-negative integer. The K1 terminals belong to the first terminal group in Embodiment 1, and the K2 terminals belong to the first terminal group. The G is a positive integer greater than 1, and the K2 is not greater than the G.

As a sub-embodiment 1 of Embodiment 2, if there is a scheduling flag in more than k of the K1 wireless signals indicating that the request is to be scheduled to continue, the L2 is 2, otherwise the L2 is 1. The k is a positive integer. The k is configurable or predefined.

As sub-embodiment 2 of Embodiment 2, the UE U3 and the UE U2 in Embodiment 1 are two different terminals.

Example 3

Embodiment 3 illustrates a schematic diagram of a plurality of time-frequency resources, as shown in FIG. In Embodiment 3, the time-frequency resources {#1, #2, ..., #L} occupy the same time resource in the time domain.

As sub-embodiment 1 of Embodiment 3, the L is equal to the L1 in the present invention, and the time-frequency resource {#1, #2, ..., #L} is the L1 time-frequency in the present invention. Resources.

As sub-embodiment 2 of Embodiment 3, the L is equal to the L2 in the present invention, and the time-frequency resource {#1, #2, ..., #L} is the L2 time-frequency in the present invention. Resources.

Example 4

Embodiment 4 illustrates a schematic diagram of a time-frequency resource, as shown in FIG. In Figure 4, A thin wireframe small square identifies an RU, and a thick wireframe large square identifies a time-frequency resource.

In Embodiment 4, the RU occupied by one time-frequency resource is continuous in the frequency domain and in the time domain.

As a sub-embodiment 1 of the fourth embodiment, the RU is an RE (Resource Element).

Example 5

Embodiment 5 exemplifies a structural block diagram of a processing device in a base station, as shown in FIG. In FIG. 5, the processing device 100 is mainly composed of a first processing module 101 and a first transmitting module 102, wherein the first transmitting module 102 is an optional module.

The first processing module 101 is configured to perform blind detection in L1 time-frequency resources and receive K1 wireless signals. The first sending module 102 is configured to send the second signaling.

In Embodiment 5, the K1 wireless signals are respectively transmitted by K1 terminals, the L1 is a positive integer, and the K1 is a non-negative integer. The wireless signal carries {uplink information, scheduling flag}, and the scheduling flag is used to determine whether the corresponding terminal requests to be scheduled to continue. The second signaling includes G information bits, and K1 information bits of the G information bits are used to determine whether the uplink information in the K1 wireless signals is correctly decoded. The other information bits of the G information bits indicate that the information is not correctly decoded.

As a sub-embodiment 1 of the embodiment 5, the first processing module 101 is further configured to send the first signaling. The first signaling is a UL-grant DCI, and the first signaling can be used by the terminal in the first terminal group to determine the L1 time-frequency resources. The first terminal group includes G terminals. The K1 terminals all belong to the first terminal group. The G is a positive integer greater than 1, and the K1 is not greater than the G.

As a sub-embodiment 2 of the embodiment 5, the first processing module 101 is further configured to send G configuration information. The configuration information includes a {first index, a second index}, and the G pieces of configuration information are respectively allocated to G terminals. The first terminal group includes the G terminals. The first index of the G pieces of configuration information is the same, and the second index of any two of the G pieces of configuration information is different. The first index is a non-negative integer and the second index is a non-negative integer.

Example 6

Embodiment 6 exemplifies a structural block diagram of a processing device in a UE, as shown in FIG. In FIG. 6, the processing device 200 is mainly composed of a second processing module 201 and a first receiving module 202, wherein the first receiving module 202 is an optional module.

The second processing module 201 is configured to send a wireless signal. The first receiving module 202 is configured to receive the second signaling.

In Embodiment 6, the wireless signal is transmitted in a target time-frequency resource, and the target time-frequency resource is one of L1 time-frequency resources, and the wireless signal carries {uplink information, scheduling flag}, and the scheduling flag Used to determine if the UE requests to be scheduled to continue. The second signaling includes G information bits, and one of the G information bits is used to determine whether the uplink information in the wireless signal is correctly decoded. The second signaling is physical layer signaling.

As a sub-embodiment 1 of Embodiment 6, the second signaling is transmitted in a CSS (Common Search Space).

As sub-embodiment 2 of embodiment 6, the scheduling flag is an information bit.

One of ordinary skill in the art can appreciate that all or part of the above steps can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium such as a read only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiment may be implemented in hardware form or in the form of a software function module. The application is not limited to any specific combination of software and hardware. The UE and the terminal in the present invention include but are not limited to mobile phones, tablet computers, notebooks, vehicle communication devices, wireless sensors, network cards, Internet of things terminals, RFID terminals, NB-IOT terminals, and MTC (Machine Type Communication). Terminals, eMTC (enhanced MTC) terminals, data cards, network cards, in-vehicle communication devices, low-cost mobile phones, low-cost tablets and other wireless communication devices. The base station in the present invention includes, but is not limited to, a macro communication base station, a micro cell base station, a home base station, a relay base station, and the like.

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

Claims

A method in a base station for wireless communication, comprising the steps of:

- Step A. Perform blind detection in L1 time-frequency resources and receive K1 wireless signals.

The K1 wireless signals are respectively sent by K1 terminals, the L1 is a positive integer, and the K1 is a non-negative integer. The wireless signal carries {uplink information, scheduling flag}, and the scheduling flag is used to determine whether the corresponding terminal requests to be scheduled to continue.
The method according to claim 1, wherein said step A further comprises the steps of:

- Step A0. Send the first signaling.

The first signaling is physical layer signaling, and the first signaling can be used by the terminal in the first terminal group to determine the L1 time-frequency resources. The first terminal group includes G terminals. The K1 terminals all belong to the first terminal group. The G is a positive integer greater than 1, and the K1 is not greater than the G.
The method according to claim 1, wherein the step A further comprises the following steps:

- Step A10. Send G configuration information.

The configuration information includes at least the latter of the {first index, the second index}, and the G pieces of configuration information are respectively allocated to the G terminals. The first terminal group includes the G terminals. The first index of the G pieces of configuration information is the same, and the second index of any two of the G pieces of configuration information is different.
The method according to claim 2, further comprising the steps of:

- Step B. Send the second signalling.

The second signaling includes G information bits, and K1 information bits of the G information bits are used to determine whether the uplink information in the K1 wireless signals is correctly decoded. The other information bits of the G information bits indicate that the information is not correctly decoded.
The method according to any one of claims 1-4, further comprising the steps of:

- Step C. Determine L2 and send the third signaling. The scheduling flag in the K1 wireless signals is used to determine the L2, and the third signaling can be used by a terminal in the first terminal group to determine the L2 time-frequency resources.

- Step D. Perform blind detection in L2 time-frequency resources and receive K2 of the wireless signals.

The third signaling is physical layer signaling, and the first terminal group includes G terminals. The K2 wireless signals are respectively sent by K2 terminals, and the L2 is a positive integer, the K2 Is a non-negative integer. The K1 terminals belong to the first terminal group, and the K2 terminals belong to the first terminal group. The G is a positive integer greater than 1, and the K2 is not greater than the G.
The method of claims 1-5 wherein one of said wireless signals comprises a positive integer number of modulation symbols and one of said modulation symbols corresponds to one or more information bits. One of the modulation symbols is mapped to Q RUs by a spreading sequence that occupies one subcarrier bandwidth in the frequency domain and occupies one OFDM symbol duration in the time domain.
Method according to claims 1-6, characterized in that said blind detection in said step A is used to determine at least one of { said K1, K1 second indices}, said K1 The second index respectively corresponds to the configuration information assigned to the K1 terminals.
A method in a UE for wireless communication, comprising the steps of:

- Step A. Send a wireless signal.

The wireless signal is transmitted in a target time-frequency resource, and the target time-frequency resource is one of L1 time-frequency resources, and the wireless signal carries {uplink information, scheduling flag}, and the scheduling flag is used. It is determined whether the UE requests to be scheduled to continue.
The method according to claim 8, wherein said step A further comprises the steps of:

- Step A0. Receive the first signaling.

The first signaling is physical layer signaling, and the first signaling can be used by the terminal in the first terminal group to determine L1 time-frequency resources. The first terminal group includes G terminals. The UE belongs to the first terminal group.
The method according to claim 8, wherein the step A further comprises the following steps:

- Step A10. Receive configuration information.

The configuration information includes at least the latter of {first index, second index}. The first signaling is identified by the first index.
The method according to any one of claims 8-10, wherein the step A further comprises the following steps:

Step A1. Select the target time-frequency resource from the L1 time-frequency resources.
The method according to any of claims 8-11, further comprising the steps of:

- Step B. Receive second signaling.

The second signaling includes G information bits, and 1 of the G information bits Information bits are used to determine if the uplink information in the wireless signal is correctly decoded.
The method of claims 8-12 wherein one of said wireless signals comprises a positive integer number of modulation symbols and one of said modulation symbols corresponds to one or more information bits. One of the modulation symbols is mapped to Q RUs by a spreading sequence that occupies one subcarrier bandwidth in the frequency domain and occupies one OFDM symbol duration in the time domain.
The method according to claims 8-13, characterized in that in the step A, the transmission of the wireless signal is determined by the UE itself.
A base station device for wireless communication, comprising the following modules:

The first processing module is configured to perform blind detection in the L1 time-frequency resources and receive K1 wireless signals.

The K1 wireless signals are respectively sent by K1 terminals, the L1 is a positive integer, and the K1 is a non-negative integer. The wireless signal carries {uplink information, scheduling flag}, and the scheduling flag is used to determine whether the corresponding terminal requests to be scheduled to continue.
The base station device according to claim 15, further comprising:

The first sending module is configured to send the second signaling.

The second signaling includes G information bits, and K1 information bits of the G information bits are used to determine whether the uplink information in the K1 wireless signals is correctly decoded. The other information bits of the G information bits indicate that the information is not correctly decoded.
The base station device according to claim 15, wherein the first processing module is further configured to:

- Determine L2 and send the third signaling. The scheduling flag in the K1 wireless signals is used to determine the L2, and the third signaling can be used by a terminal in the first terminal group to determine the L2 time-frequency resources.

- Perform blind detection in L2 time-frequency resources, and receive K2 of the wireless signals.

The third signaling is physical layer signaling, and the first terminal group includes G terminals. The K2 wireless signals are respectively transmitted by K2 terminals, the L2 is a positive integer, and the K2 is a non-negative integer. The K1 terminals belong to the first terminal group, and the K2 terminals belong to the first terminal group. The G is a positive integer greater than 1, and the K2 is not greater than the G.
A user equipment for wireless communication, comprising the following modules:

The second processing module is configured to send a wireless signal.

The wireless signal is transmitted in a target time-frequency resource, and the target time-frequency resource is one of L1 time-frequency resources, and the wireless signal carries {uplink information, scheduling flag}, and the scheduling flag is used. It is determined whether the UE requests to be scheduled to continue.
The user equipment according to claim 18, wherein the second processing module is used for at least one of the following:

- Receive the first signaling. The first signaling is physical layer signaling, and the first signaling can be used by the terminal in the first terminal group to determine L1 time-frequency resources. The first terminal group includes G terminals. The UE belongs to the first terminal group.

Selecting the target time-frequency resource from the L1 time-frequency resources.
The user equipment according to claim 18, wherein the method further comprises:

The first receiving module is configured to receive the second signaling.

The second signaling includes G information bits, and one of the G information bits is used to determine whether the uplink information in the wireless signal is correctly decoded.