CN108242970B - Resource unit-based feedback method and device for unlicensed transmission - Google Patents

Resource unit-based feedback method and device for unlicensed transmission Download PDF

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Publication number
CN108242970B
CN108242970B CN201611214954.8A CN201611214954A CN108242970B CN 108242970 B CN108242970 B CN 108242970B CN 201611214954 A CN201611214954 A CN 201611214954A CN 108242970 B CN108242970 B CN 108242970B
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feedback
uplink data
unit
information
data
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CN108242970A (en
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晁华
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Nokia Shanghai Bell Co Ltd
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Nokia Shanghai Bell Co Ltd
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Priority to CN201611214954.8A priority Critical patent/CN108242970B/en
Priority to PCT/IB2017/001723 priority patent/WO2018122609A2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1657—Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1806—Go-back-N protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Abstract

The invention discloses a feedback method and a device of non-permission transmission based on resource units, wherein the feedback method comprises the following steps: the network side equipment receives uplink data which is sent on a resource unit used for non-permission transmission and from at least one user terminal and carries out data processing on the uplink data; and according to the data processing result, sending feedback information on the feedback resource for the feedback of the non-permission transmission corresponding to the resource unit for the non-permission transmission. The method provides feedback based on resource units, can effectively reduce the cost of feedback signaling, can effectively combine and use fast feedback and retransmission combination, improves the feedback efficiency and improves the success rate of retransmission combination.

Description

Resource unit-based feedback method and device for unlicensed transmission
Technical Field
The present invention relates to the field of wireless communication, and more particularly, to a feedback method and apparatus for resource unit-based unlicensed transmission in the field of wireless communication.
Background
In a new research project of 3GPP 5G on a new radio air interface access technology, a feature of the uplink non-orthogonal multiple access technology based on the grant-free (grant-free) format is that uplink transmission of a UE does not require a dynamic or explicit scheduling grant, i.e., an unlicensed transmission, from a gNB (5G base station). Multiple user terminals (UEs) may share the same time and frequency resources. The 3GPP will further study in several areas:
-handling of potential collisions of multiple access signatures (MA signatures);
retransmission/repetition and potential combining, such as hybrid automatic repeat request (HARQ).
In the 3GPP proposal, a scheme of 1-step and 2-step unlicensed transmission is proposed, as shown in fig. 1. In this specification, feedback applied to unlicensed Transmission is referred to as unlicensed feedback, and fast HARQ feedback for unlicensed Transmission may be applied to a 1-step Transmission process, that is, if a network-side device, such as a Transmission Reception Point (TRP), decodes a preamble, the feedback may be fed back to the UE before data decoding. However, several technical problems in retransmission design need to be solved:
1. how is a certain UE informed that HARQ feedback from the network is addressed to itself?
2. How to design feedback signaling to the UE and reduce signaling overhead and latency?
3. How are retransmissions scheduled for possible HARQ combining?
In view of the first problem, in the prior art, such as LTE or LTE-a system, HARQ feedback is HARQ feedback for UEs, and in each feedback information, information of the UE is carried, so that each UE can detect HARQ feedback sent to itself. For unlicensed transmissions, however, multiple UEs may share the same time-frequency resource for uplink transmissions. If the TRP allocates an independent PHICH (physical HARQ indicator channel) or independent feedback information to each UE, the signaling overhead is very high.
For the second problem, the prior art applies fast feedback to 1-step transmission, however, the preamble ID is also included in the feedback signaling for indicating which preamble the TRP detects, and the signaling overhead is also high. In the 2-step transmission scheme, both the preamble ID and the user ID must be included in the feedback signaling to indicate which preamble is detected by the UE and which UE has correctly received the user data, and the signaling overhead is also high.
To solve the third problem, in the existing 3GPP proposal R1-1609783, "mtc unlicensed uplink transmission", it is proposed to set a fixed offset between the retransmission and the first transmission to achieve HARQ combining. However, this scheme also requires separate preamble feedback and data feedback, resulting in high signaling overhead. For 1-step transmission, the scheme is not needed at all; specifically, the scheme does not consider collision conditions, and in some cases of 1-step transmission, for example, different UEs transmit different preambles on the same time-frequency resource, and the TRP cannot correctly decode data, all UE retransmissions with fixed offsets will transmit collisions, and HARQ combining cannot be achieved.
Disclosure of Invention
Aiming at the non-permission transmission, the invention breaks through the feedback design based on UE in the prior art and creatively provides the feedback design based on Resource Unit (RU).
According to a first aspect of the present invention, there is provided a feedback method for unlicensed transmission based on resource units, comprising:
the method comprises the steps that network side equipment receives uplink data which are sent on a resource unit used for unlicensed transmission from at least one user terminal;
the network side equipment performs data processing on the uplink data;
and the network side equipment sends feedback information on the feedback resource for the feedback of the non-permission transmission corresponding to the resource unit for the non-permission transmission according to the data processing result.
According to an embodiment of the present invention, the uplink data includes a preamble and data information of at least one user terminal; the network side equipment performs data processing on the uplink data, wherein the data processing includes preamble detection, and according to the detection result of the preamble, the network side equipment judges whether the data information needs to be decoded, and if the data information needs to be decoded, the network side equipment further decodes the data information.
According to an embodiment of the present invention, the sending, by the network side device, feedback information on the feedback resource for the feedback of the unlicensed transmission according to the data processing result includes:
when the network side equipment detects the lead code of the uplink data, at least one lead code is detected, and the data information of at least one user terminal is successfully decoded, the network side equipment sends feedback information I on the feedback resource for the non-permission transmission feedback;
when the network side equipment detects the lead codes of the uplink data, detects at least one lead code, decodes the data information but fails to successfully decode the data information, and the network side equipment sends feedback information II on the feedback resources for the non-permission transmission feedback;
when the network side equipment detects lead codes of uplink data, at least two lead codes are detected, the network side equipment judges that the data information cannot be decoded correctly, the network side equipment does not decode the data information, and feedback information III is sent on the feedback resource for the non-permission transmission feedback;
and when the network side equipment detects the lead code of the uplink data and cannot detect the lead code, the network side equipment does not decode the data information and sends feedback information IV on the feedback resource for the non-permission transmission feedback.
According to an embodiment of the present invention, when the network side device sends the feedback information, the user ID information that is correctly decoded out of the data information is further sent.
According to an embodiment of the present invention, the feedback information is used to indicate that the ue that sends uplink data on the resource unit for unlicensed transmission and is correctly decoded data information does not need to retransmit the uplink data, and the ue that sends uplink data on the resource unit for unlicensed transmission and is not correctly decoded data information retransmits the uplink data; the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data; the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data; and the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data.
According to an embodiment of the present invention, further, the feedback information one is also used to indicate that the ue that sends uplink data on the resource unit for unlicensed transmission and has not correctly decoded data information retransmits the uplink data in a fixed offset manner; the second feedback information is also used for instructing a user terminal which sends uplink data on a resource unit for unlicensed transmission to retransmit the uplink data in a fixed offset manner; the feedback information III is also used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode; the feedback information is further used for instructing the user terminal sending the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode.
According to an embodiment of the present invention, when the network side device sends a first feedback information, the network side device sends the first feedback information at a fixed time offset from a current subframe where the uplink data is received; when the network side equipment sends the second feedback information, the network side equipment sends the second feedback information at a fixed time offset with the current subframe receiving the uplink data; when the network side equipment sends the third feedback information, the network side equipment sends the third feedback information in the next subframe of receiving the uplink data; and when the network side equipment sends the feedback information IV, the network side equipment sends the feedback information IV in the next subframe which receives the uplink data.
According to an embodiment of the present invention, the uplink data includes data information of at least one user equipment; the network side equipment performs data processing on the uplink data, namely decoding data information, and if the network side equipment successfully decodes the data information of at least one user terminal, the network side equipment sends feedback information V on the feedback resource for the non-permission transmission feedback; if the network side equipment can not successfully decode the data information from the user terminal, the network side equipment sends feedback information six on the feedback resource for the non-permission transmission feedback;
according to an embodiment of the present invention, further, before receiving uplink data from at least one ue, which is sent in resource units used for unlicensed transmission, the network side device also receives a preamble from the at least one ue, and performs preamble detection.
According to an embodiment of the present invention, if the network side device correctly detects the preamble, the network side device sends feedback information seven and the ID of the detected preamble to instruct the ue that sent the ID of the preamble to send the uplink data information.
According to an embodiment of the present invention, when the network side device sends the feedback information five, the user ID information of the data information decoded correctly is further sent.
According to an embodiment of the present invention, the feedback information is used to indicate that the ue that has correctly decoded data information does not need to retransmit the uplink data; the feedback information six is used for instructing the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data.
According to an embodiment of the present invention, when the network side device sends feedback information five or feedback information six at a fixed time offset from a current subframe receiving the uplink data; and the network side equipment sends feedback information seven in a feedback window of the preamble code received by the user terminal.
According to a second aspect of the present invention, there is provided a feedback method for unlicensed transmission based on resource units, comprising:
the user terminal sends uplink data on a resource unit for unlicensed transmission;
receiving feedback information sent by the network side equipment on the feedback resource for the feedback of the non-permitted transmission corresponding to the resource unit for the non-permitted transmission;
according to the feedback information, the user terminal retransmits the transmitted uplink data; or not retransmitted.
According to an embodiment of the present invention, the uplink data includes a preamble and data information.
According to an embodiment of the present invention, if the user equipment receives the first feedback information, the user equipment further detects whether the user equipment receives the user ID of the user equipment, and if the user equipment receives the user ID of the user equipment, the user equipment does not perform retransmission operation; if the user ID of the user equipment is not received, the user equipment retransmits the uplink data on a resource unit for unlicensed transmission;
if the user terminal receives the feedback information II, the user terminal retransmits the uplink data on a resource unit for non-permission transmission;
if the user terminal receives the feedback information III, the user terminal retransmits the uplink data on a resource unit for non-permission transmission;
and if the user terminal receives the feedback information IV, the user terminal retransmits the uplink data on the resource unit for the non-permission transmission.
According to an embodiment of the present invention, if the ue receives the first feedback information and does not receive its own user ID, the ue retransmits the uplink data in a fixed offset manner on a resource unit for unlicensed transmission;
if the user terminal receives the feedback information II, the user terminal retransmits the uplink data on a resource unit for the non-permission transmission in a fixed offset mode;
if the user terminal receives the feedback information III, the user terminal retransmits the uplink data in a random backoff mode on a resource unit for the non-permission transmission;
and if the user terminal receives the feedback information IV, the user terminal retransmits the uplink data in a random back-off mode on the resource unit for the non-permission transmission.
According to an embodiment of the invention, the uplink data comprises data information.
According to an embodiment of the present invention, if the user terminal receives the feedback information five, the user terminal further detects whether the user terminal receives the user ID of the user terminal, and if the user terminal receives the user ID of the user terminal, the user equipment does not perform the retransmission operation; if the user ID of the user equipment is not received, the user equipment retransmits the uplink data on a resource unit for unlicensed transmission;
and if the user equipment receives the feedback information six, the user equipment retransmits the uplink data on the resource unit for the non-permission transmission.
According to one embodiment of the present invention, the user terminal retransmits the uplink data in a fixed offset manner on a resource unit for unlicensed transmission.
According to an embodiment of the present invention, before the ue transmits uplink data in resource units used for unlicensed transmission, the ue further includes:
transmitting a preamble;
and receiving feedback information of the preamble from the network side equipment.
According to an embodiment of the present invention, if the ue receives the feedback information seven, the ue further detects whether it receives its preamble ID, and if it receives its preamble ID, the ue sends the uplink data in resource units for unlicensed transmission; if the user equipment does not receive the preamble ID of the user equipment, the user equipment retransmits a preamble.
According to a third aspect of the present invention, a network side device for performing feedback of unlicensed transmission based on resource units is provided, including:
a receiving unit configured to receive uplink data transmitted on a resource unit for unlicensed transmission from at least one user terminal;
a data processing unit configured to perform data processing on the uplink data;
a feedback unit configured to transmit feedback information on a feedback resource for unlicensed transmission feedback corresponding to the resource unit for unlicensed transmission according to the data processing result.
According to an embodiment of the present invention, the uplink data includes a preamble and data information of at least one user terminal; the data processing unit comprises a preamble detection unit configured for preamble detection; the network side equipment also comprises a judging unit which is configured to judge whether the data information needs to be decoded or not according to the detection result of the lead code detecting unit; the data processing unit further comprises a data decoding unit configured to decode the data information.
According to an embodiment of the present invention, the feedback information sent by the feedback unit is one of the following:
when the preamble detection unit detects at least one preamble, and the data decoding unit successfully decodes the data information of at least one user terminal, the feedback unit sends a first feedback information on the feedback resource for the feedback of the unlicensed transmission;
when the preamble detection unit detects at least one preamble and the data decoding unit fails to successfully decode the data information, the feedback unit sends feedback information II on the feedback resource for the feedback of the non-permitted transmission;
the current lead code detection unit detects at least two lead codes, the judgment unit judges that the data information cannot be correctly decoded, the data decoding unit does not decode the data information, and the feedback unit sends feedback information III on the feedback resource for the non-permission transmission feedback;
when the preamble detection unit fails to detect the preamble, the data decoding unit does not decode the data information, and the feedback unit sends feedback information four on the feedback resource for the unlicensed transmission feedback.
According to an embodiment of the present invention, the feedback unit, when sending the feedback information, is further configured to send user ID information that is correctly decoded out of the data information.
According to an embodiment of the present invention, the feedback information is used to indicate that the ue that sends uplink data on the resource unit for unlicensed transmission and is correctly decoded data information does not need to retransmit the uplink data, and the ue that sends uplink data on the resource unit for unlicensed transmission and is not correctly decoded data information retransmits the uplink data; the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data; the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data; and the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data.
According to an embodiment of the present invention, further, the feedback information one is also used to instruct the ue that sends uplink data on the resource unit for unlicensed transmission and that has not correctly decoded data information to retransmit the uplink data in a fixed offset manner; the second feedback information is also used for instructing a user terminal which sends uplink data on a resource unit for unlicensed transmission to retransmit the uplink data in a fixed offset manner; the feedback information III is also used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode; the feedback information is further used for instructing the user terminal sending the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode.
According to an embodiment of the present invention, when the feedback unit is configured to send feedback information one, the feedback unit is configured to send feedback information one at a fixed time offset from a current subframe in which the uplink data is received; when the feedback unit is configured to send feedback information two, the feedback unit is configured to send feedback information two at a fixed time offset from a current subframe receiving the uplink data; when the feedback unit is configured to send feedback information three, the feedback unit is configured to send feedback information three in the next subframe where the uplink data is received; when the feedback unit is configured to send feedback information four, the feedback unit is configured to send feedback information four in the next subframe where the uplink data is received.
According to an embodiment of the present invention, the uplink data includes data information of at least one user equipment; the data processing unit is configured for decoding data information, and if the data processing unit successfully decodes the data information of at least one user terminal, the feedback unit is configured for sending feedback information five on the feedback resource for the feedback of the non-permitted transmission; if the data processing unit cannot successfully decode the data information from the user terminal, the feedback unit is configured to send feedback information six on the feedback resource for the unlicensed transmission feedback;
according to an embodiment of the present invention, the receiving unit is further configured to receive a preamble from the at least one ue before receiving uplink data from the at least one ue, which is transmitted in resource units for unlicensed transmission, and output the preamble to the preamble detecting unit for preamble detection.
According to an embodiment of the present invention, if the preamble detection unit correctly detects the preamble, the feedback unit is configured to send feedback information seven and the ID of the detected preamble to instruct the ue that sent the preamble ID to send the uplink data information.
According to an embodiment of the present invention, when the feedback unit is configured to send the feedback information five, the feedback unit is further configured to send the user ID information that is correctly decoded to obtain the data information.
According to an embodiment of the present invention, the feedback information is used to indicate that the ue that has correctly decoded data information does not need to retransmit the uplink data; the feedback information six is used for instructing the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data.
According to an embodiment of the present invention, the feedback unit is configured to send feedback information five or feedback information six at a fixed time offset from a current subframe in which the uplink data is received; the feedback unit is configured to send feedback information seven within a feedback window of the preamble received from the user terminal.
According to a fourth aspect of the present invention, there is provided a user equipment for feedback on unlicensed transmission based on resource units, comprising:
a transmission unit configured to transmit uplink data on a resource unit for unlicensed transmission;
a receiving unit configured to receive feedback information sent from a network side device on a feedback resource for unlicensed transmission feedback corresponding to the resource unit for unlicensed transmission;
a retransmission unit configured to retransmit the transmitted uplink data according to the feedback information; or not retransmitted.
According to an embodiment of the present invention, the uplink data includes a preamble and data information.
According to an embodiment of the present invention, the apparatus further includes a user ID detection unit configured to, when the receiving unit receives the first feedback information, detect whether the user ID of the receiving unit is received, and if the user ID of the receiving unit is received, the retransmission unit does not perform the retransmission operation; the retransmission unit is configured to retransmit the uplink data in a resource unit for unlicensed transmission if the own user ID is not received;
if the receiving unit receives the second feedback information, the retransmitting unit is configured to retransmit the uplink data on a resource unit for unlicensed transmission;
if the receiving unit receives the feedback information three, the retransmitting unit is configured to retransmit the uplink data on a resource unit for unlicensed transmission;
if the receiving unit receives the feedback information four, the retransmitting unit is configured to retransmit the uplink data on a resource unit for unlicensed transmission.
According to an embodiment of the present invention, if the receiving unit receives the first feedback information and the user ID detecting unit does not detect its own user ID, the retransmitting unit is configured to retransmit the uplink data in a fixed offset manner on a resource unit for unlicensed transmission;
if the receiving unit receives the second feedback information, the retransmitting unit is configured to retransmit the uplink data in a fixed offset manner on a resource unit for unlicensed transmission;
if the receiving unit receives the feedback information III, the retransmitting unit is configured to retransmit the uplink data in a random backoff mode on a resource unit for the non-permission transmission;
if the receiving unit receives the feedback information four, the retransmitting unit is configured to retransmit the uplink data in a random backoff manner on a resource unit for unlicensed transmission.
According to an embodiment of the invention, the uplink data comprises data information.
According to an embodiment of the present invention, the mobile terminal further includes a user ID detection unit configured to further detect whether an own user ID is received; when the receiving unit receives the feedback information five, if the user ID detection unit detects the user ID of the receiving unit, the retransmission unit does not perform retransmission operation; if the user ID detection unit does not detect the user ID of the user, the retransmission unit is configured to retransmit the uplink data on a resource unit for unlicensed transmission;
if the receiving unit receives the feedback information six, the retransmitting unit is configured to retransmit the uplink data on the resource unit for the unlicensed transmission.
According to an embodiment of the present invention, the retransmission unit is configured to retransmit the uplink data at a fixed offset in resource units for unlicensed transmission.
According to an embodiment of the present invention, the sending unit further comprises a transmitter configured to send a preamble before sending uplink data in resource units for unlicensed transmission; the receiving unit is further configured to receive feedback information of the preamble from the network side device.
According to an embodiment of the present invention, the apparatus further includes a preamble ID detection unit, if the receiving unit receives the feedback information seven, the preamble ID detection unit is configured to further detect whether the own preamble ID is received, and if the own preamble ID is received, the transmitting unit is configured to transmit the uplink data in a resource unit for unlicensed transmission; the transmitting unit is configured to retransmit a preamble if its own preamble ID is not received.
According to a fifth aspect of the present invention, a resource allocation method in a wireless network is provided, where the wireless network includes a network side device and at least one ue, and the network side device allocates resource units for unlicensed uplink transmission of the ue; and allocating feedback resources for the unlicensed feedback of the network side device, where the resource units for the unlicensed uplink transmission of the user equipment and the feedback resources for the unlicensed feedback of the network side device have a corresponding relationship.
Drawings
Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments thereof, which proceeds with reference to the accompanying drawings.
FIG. 1a shows a schematic flow diagram of a 1-step transmission;
FIG. 1b shows a schematic flow diagram of a 2-step transmission;
fig. 2 shows a correspondence diagram of resource units for unlicensed transmission and resources for unlicensed feedback.
Fig. 3 shows a processing flowchart of the network side device based on the feedback of the resource unit in the 1-step transmission.
Fig. 4 shows a processing flowchart of the network side device based on the feedback of the resource unit in the 2-step transmission.
Fig. 5 shows a process flow diagram of a user terminal based on feedback of resource units in 1-step transmission.
Fig. 6 shows a process flow diagram of a user terminal based on feedback of resource units in 2-step transmission.
Fig. 7 shows a block diagram of a network-side device structure for feedback based on resource units.
Fig. 8 shows a block diagram of a user terminal structure for feedback based on resource units.
Fig. 9 shows feedback information characteristics and meanings of the unlicensed feedback.
Detailed Description
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings illustrate, by way of example, specific embodiments in which the invention may be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments according to the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims. It should be noted that although the steps of methods of the present invention are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results, but rather that the steps described herein can be performed in an order that varies. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
The invention sets a resource unit as the basic size of the resource used for the non-permission transmission in the wireless transmission system, and the resource unit is the minimum resource granularity of the uplink non-permission transmission and can comprise a time domain and/or a frequency domain. For example, in the time domain, the resource unit is a subframe, and in the frequency domain, the resource unit is a physical resource block PRB. Of course, this partitioning is merely an example, and the system may define smaller or larger resource granularities, what the particular granularity is has no impact on the present invention.
Resource unit based feedback means that the feedback for the unlicensed transmission is based on each resource unit that has been allocated instead of each UE. Under the unlicensed transmission mechanism, multiple UEs may share the same time and frequency resources, that is, each resource unit may have uplink data of multiple UEs, and after receiving the uplink data, the network side device performs feedback based on the resource unit according to the decoding condition of the uplink data, and sends feedback information on the corresponding resource for unlicensed feedback. The feedback is for all UEs sharing this resource unit. In order to allow all UEs sharing the resource unit to correctly and effectively receive the unlicensed feedback information, the present invention further proposes that the resource unit for unlicensed transmission and the resource for unlicensed feedback have a corresponding relationship. According to the corresponding relation, the UE can read the feedback information of the UE on the determined resource and correspondingly process the feedback information. In addition, in many cases, all UE preamble information and user ID information sharing the resource unit do not need to be sent in the feedback information, which can greatly save signaling overhead.
Fig. 2 exemplarily illustrates a correspondence of resource units for unlicensed transmission and resources for unlicensed feedback. According to the corresponding relationship, all UEs sharing the same resource unit 1 read the feedback information on the corresponding feedback resource 1, and correspondingly, all UEs sharing the same resource unit 2 and resource unit 3 read the feedback information on the corresponding feedback resource 2 and feedback resource 3, respectively. The corresponding relation between the resource unit for the unlicensed transmission and the resource for the unlicensed feedback is set by the system and notified to the corresponding UE and the network side device. How to allocate resources to the unlicensed transmission and how to design the correspondence is out of the scope of the present invention, for example, a specific physical channel may be designed to carry the unlicensed feedback; existing physical channels may also be utilized to carry unlicensed feedback and the like.
Fig. 3 exemplarily illustrates a processing procedure of a network side device based on feedback of resource units in 1-step transmission. That is, the resource unit-based feedback of the present invention is applied in 1-step transmission. At least one user terminal is assumed to transmit uplink data on a resource unit allocated with non-permission transmission in the nth subframe, wherein the uplink data comprises a preamble and user data information. The network side equipment receives uplink data of the user terminal on a certain resource unit allocated for the non-permission transmission in the nth subframe; and the data processing is carried out on the data: the network side device first performs preamble detection, in step S301, the network side device determines whether a preamble is detected, and if the preamble is not detected, the network side device performs step S302, and the network side device sends feedback information four. And the feedback information is sent on the resource for the non-permission feedback corresponding to the resource unit allocated by the system for the non-permission transmission in one of the nth subframes, and the quick feedback can be applied, namely the network side equipment quickly sends the feedback information on the (n +1) th subframe for the resource unit. And the feedback information IV does not need to carry the lead code ID and the user ID, and only needs to inform all the user terminals which send the uplink data on the resource unit which is allocated with the non-permission transmission in the nth subframe to resend the uplink data comprising the lead code and the data information. In this case, HARQ combining cannot be performed, and to avoid collision of the unlicensed uplink transmission, the feedback information iv is further used to instruct all the user terminals that transmit uplink data in the resource unit of the nth subframe used for the unlicensed transmission to retransmit uplink data thereof in a random backoff manner. In another embodiment, the network side device does not send any information to indicate this option.
In step S303, if the network side device detects more than one preamble (i.e. at least two preambles) in a certain resource unit allocated for the unlicensed transmission in the nth subframe, and the network side device determines that the data information cannot be decoded correctly, the network side device does not decode the data information, that is, the network side device can perform feedback without further decoding of the data information, in step S304, the network side device sends the feedback information three on the resource for unlicensed feedback allocated by the system corresponding to the resource unit allocated for the unlicensed transmission in the nth subframe, and can apply fast feedback, that is, the network side device quickly sends the feedback information three for the resource unit in the (n +1) th subframe. And the feedback information III does not need to carry the lead code ID and the user ID, and only needs to inform all user terminals which send the uplink data on one resource unit allocated with the non-permission transmission in the nth subframe to resend the uplink data comprising the lead code and the data information. In this case, HARQ combining cannot be performed, and in order to avoid collision of the unlicensed uplink transmission, the feedback information three is further used to instruct all the user terminals that transmit uplink data in the resource unit of the nth subframe used for the unlicensed transmission to retransmit uplink data thereof in a random backoff manner. The network side device discards the uplink data that has been received on this resource unit, because the data has no value for HARQ combining. As an embodiment, if the network device only has single-user detection capability, the number of detected preambles is greater than or equal to 2, and the network side device considers that the processing capability of the network side device is exceeded; if the network device has multi-user detection capability, when the number of the detected lead codes exceeds the multi-user detection capability, the probability that the network device considers successful decoding is very low, and exceeds the processing capability, the network side device judges that the data information cannot be decoded correctly, the network side device does not decode the data information and executes to send quick feedback, and abandons the uplink data which is received on the resource unit.
If the network side device detects only one preamble on a certain resource unit allocated for the unlicensed transmission in the nth subframe, or the number of detected preambles is less than the multi-user detection capability, the network side device performs step S305 to continue decoding data, and if the data decoding fails, the network side device stores the uplink data received on the resource unit for HARQ combining. The network side device continues to execute step S306, and sends a second feedback information on a resource for unlicensed feedback, which is allocated by the system and corresponds to a certain resource unit allocated for unlicensed transmission in the nth subframe, for example, sends the second feedback information to the UE in the (n + k) th subframe; the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data; in order to achieve HARQ combining, the second feedback information is also used for indicating a user terminal which sends uplink data on a resource unit used for non-permission transmission to retransmit the uplink data in a fixed offset mode; that is, a fixed offset is set between the retransmission and the first transmission to achieve HARQ combining. The fixed offset is configured by the system and may include time and frequency offsets.
The network side device performs step S305 to continue decoding data, and if the data decoding is successful, the network side device stores the uplink data received in the resource unit, and the network side device continues to perform step S307 to send the first feedback information on the resource for unlicensed feedback, which is allocated by the system and corresponds to a certain resource unit allocated for unlicensed transmission in the nth subframe, and further send the user ID information of the correctly decoded data information, for example, send the first feedback information and the user ID information to the UE in the (n + k) th subframe for the resource unit; the feedback information is used for indicating that the user terminal which sends the uplink data on the resource unit for the non-permission transmission and is correctly decoded the data information does not need to retransmit the uplink data, and the user terminal which sends the uplink data on the resource unit for the non-permission transmission and is not correctly decoded the data information retransmits the uplink data; the feedback information further indicates that the ue transmitting uplink data in the resource unit for unlicensed transmission and not correctly decoding the data information retransmits the uplink data in a fixed offset manner to achieve HARQ combining.
For the third feedback information and the fourth feedback information, the network side device may send the feedback information without further data information decoding, and at this time, the fast feedback may be applied, for example, after the network side device receives the unlicensed uplink transmission in the current subframe, for example, the nth subframe, the network side device sends the feedback for the unlicensed uplink transmission in the next subframe, for example, the (n +1) th subframe. For the first feedback information and the second feedback information, the network side device needs to decode further data information and then send the feedback information, and may send feedback at a fixed time offset, for example, at the (n + k) -th subframe. The time offset parameter k is predefined by the system, and in the existing LTE/LTE-a FDD system, k is 4. In a 5G new wireless access FDD system, k may be less than 4 if hardware processing capability can be greatly enhanced. The design of the invention can apply fast feedback as much as possible, and effectively reduce time delay.
Fig. 9 exemplarily lists the details of the feedback information described above. As shown in the above table, the unlicensed feedback has 4 options, only 2 bits of feedback information are needed, and 2 of them can be fast feedback. Only when the information is fed back, the correctly decoded user ID needs to be fed back at the same time, so that the signaling overhead can be greatly saved. In the case of the feedback information three, the network instructs the user to perform retransmission in a fixed offset manner, so that the network side device knows the location of the retransmission resource, and HARQ combining is possible, whereas in the case of other situations where HARQ combining cannot be performed, the network instructs the user to perform retransmission in a random backoff manner, which can greatly reduce the possibility of collision. Similarly, even in the case of multi-user detection, the feedback information is 4, and the signaling of the feedback only needs 2 bits.
Fig. 4 exemplarily illustrates a processing procedure of a network side device based on feedback of resource units in 2-step transmission. That is, the resource unit based feedback of the present invention is applied in 2-step transmission. Assuming that at least one user terminal transmits uplink data on a resource unit allocated for unlicensed transmission, in 2-step transmission, a preamble and user data information are transmitted in two steps. The network side equipment receives uplink data of a user terminal on a resource unit allocated for the non-permission transmission; and the data processing is carried out on the data: the network side device first performs preamble detection, in step S401, the network side device determines whether a preamble is detected, and if the preamble is not detected, the network side device performs step S402, and the network side device sends feedback information nine. Since no preamble is detected, the network side device does not perform further data decoding, that is, can perform feedback without performing further data information decoding, and this feedback information is sent on the resource for unlicensed feedback corresponding to the resource unit allocated for unlicensed transmission in the system, and can apply fast feedback, that is, the network side device quickly sends feedback information four for the resource unit in the (n +1) th subframe in time. The feedback information nine does not need to carry the preamble ID and the user ID, and only needs to notify all the user terminals that send the uplink data in the resource unit allocated with the non-allowed transmission in the nth subframe to resend the uplink data including the preamble and the data information. In this case, HARQ combining cannot be performed, and in order to avoid collision of the unlicensed uplink transmission, the feedback information nine is further used to instruct all the user terminals that transmit uplink data in the resource unit for unlicensed transmission to retransmit uplink data thereof in a random backoff manner. In another embodiment, the network side device does not send any information to indicate this option.
In step S403, if the network side device detects more than one preamble (i.e. at least two preambles) in the resource unit allocated for the unlicensed transmission and the network side device determines that the data information cannot be decoded correctly, the network side device does not decode the data information, i.e. the feedback can be performed without further decoding of the data information, in step S404, the network side device sends the feedback information eight on the resource allocated by the system for the unlicensed feedback corresponding to the resource unit allocated for the unlicensed transmission, and may apply fast feedback, i.e. the network side device sends the feedback information eight for the resource unit in the first next subframe in time. And the feedback information eight does not need to carry the preamble ID and the user ID, and only needs to inform all the user terminals which send the uplink data on the resource unit allocated with the non-permission transmission to resend the uplink data comprising the preamble and the data information. In this case, HARQ combining cannot be performed, and in order to avoid collision of the unlicensed uplink transmission, the feedback information eight is further used to instruct all the user terminals that transmit uplink data in the resource unit for unlicensed transmission to retransmit uplink data thereof in a random backoff manner. The network side device discards the uplink data that has been received on this resource unit, because the data has no value for HARQ combining. As an embodiment, if the network device only has single-user detection capability, the number of detected preambles is greater than or equal to 2, and the network side device considers that the processing capability of the network side device is exceeded; if the network device has multi-user detection capability, when the number of the detected lead codes exceeds the multi-user detection capability, the probability that the network device considers successful decoding is very low, and exceeds the processing capability, the network side device judges that the data information cannot be decoded correctly, the network side device does not decode the data information and executes to send quick feedback, and abandons the uplink data which is received on the resource unit.
If the network side device detects only one preamble in the resource unit allocated for the unlicensed transmission, or the number of detected preambles is less than the multi-user detection capability, the network side device performs step S405 to send feedback information seven and the ID of the detected preamble to instruct the ue that sent the preamble ID to send uplink data information thereof. And the network side equipment sends feedback information seven and the detected ID of the lead code in a feedback window of the lead code of the user terminal.
In step S406, the network side device receives an unlicensed uplink transmission from the ue in a resource unit allocated by the system for the unlicensed transmission, and in step S407, decodes and determines the received data information, and if the data decoding fails, the network side device stores the uplink data received in the resource unit for HARQ combining. The network side device continues to execute step S409, and sends feedback information six on the resource for unlicensed feedback corresponding to the resource unit allocated for unlicensed transmission and allocated by the system; the feedback information six is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data; in order to achieve HARQ combining, the feedback information six is further used to instruct the ue sending uplink data on the resource unit for unlicensed transmission to retransmit the uplink data in a fixed offset manner; that is, a fixed offset is set between the retransmission and the first transmission to achieve HARQ combining.
The network side device executes step S407, continuing to decode the data, and if the data decoding is successful, the network side device stores the uplink data received on the resource unit, and the network side device continues to execute step S408, sending feedback information five on the resource for unlicensed feedback, which is allocated by the system and corresponds to the resource unit allocated for unlicensed transmission, and further sending the user ID information of which the data information is correctly decoded; the feedback information is used for indicating that the user terminal which sends the uplink data on the resource unit for the non-permission transmission and is correctly decoded the data information does not need to retransmit the uplink data, and the user terminal which sends the uplink data on the resource unit for the non-permission transmission and is not correctly decoded the data information retransmits the uplink data; the feedback information v further indicates that the ue transmitting uplink data in the resource unit for unlicensed transmission and not correctly decoding the data information retransmits the uplink data in a fixed offset manner to achieve HARQ combining.
For the feedback information seven, the feedback information eight, and the feedback information nine, the network side device may send the feedback information without further data information decoding, and at this time, fast feedback may be applied, for example, after the network side device receives the unlicensed uplink transmission in the current subframe, for example, the nth subframe, the network side device may send the feedback information in the next subframe, for example, the nth subframe
The (n +1) subframe sends feedback for this uplink unlicensed transmission. For the fifth feedback information and the sixth feedback information, the network side device needs to decode further data information and then send the feedback information, and may send feedback at a fixed time offset, for example, at the (n + k) -th subframe. The time offset parameter k is predefined by the system, and in the existing LTE/LTE-a FDD system, k is 4. In a 5G new wireless access FDD system, k may be less than 4 if hardware processing capability can be greatly enhanced. The design of the invention can apply fast feedback as much as possible, and effectively reduce time delay.
Similarly, since in many cases, the preamble ID and the user ID do not need to be fed back, the feedback signaling overhead is also greatly reduced.
The processing of the user terminal corresponds to the processing of the network side device.
Fig. 5 exemplarily illustrates a process of a user terminal for resource unit-based feedback in 1-step transmission. That is, the resource unit-based feedback of the present invention is applied in 1-step transmission. It should be noted that the processing procedure of fig. 5 corresponds to the processing procedure of fig. 3.
In step S501, the UE transmits uplink data including a preamble and data information in an nth subframe in a resource unit allocated for unlicensed transmission. In step S502, the UE will attempt to receive the unlicensed feedback on the feedback resource corresponding to the resource unit where it performs the unlicensed transmission within the feedback window, i.e., from the (n +1) th subframe to the (n + k) th subframe, and perform corresponding processing. The size k of the feedback window is set by the system. For the resource units used by the UE, in step S506, if the UE receives feedback information four in the (n +1) th subframe or does not receive any feedback until the (n + k) th subframe, the UE performs step S510 to perform retransmission in a random backoff manner. In step S505, if the UE receives the feedback information three in the (n +1) th subframe, the UE performs step S510 to perform retransmission in a random backoff manner. In step S504, if the UE receives the second feedback information in the (n + k) th subframe, the UE performs step S509 to perform retransmission in a fixed offset manner. The fixed offset is configured by the system and may include time and frequency offsets. In step S503, if the UE receives the first feedback information in the (n + k) th subframe, the UE performs step S507 to further detect whether there is its own user ID in the feedback information. In step S508, the UE receives its own user ID, and then the UE knows that its transmission in the nth subframe is successful, and does not need to perform data retransmission; if the UE does not receive its user ID, the UE knows that its transmission in the nth subframe is unsuccessful, and the UE performs step S509 to perform retransmission in a fixed offset manner. The fixed offset is configured by the system and may include time and frequency offsets.
Fig. 6 exemplarily illustrates a process of a user terminal for resource unit-based feedback in 2-step transmission. That is, the resource unit based feedback of the present invention is applied in 2-step transmission. It should be noted that the processing procedure of fig. 6 corresponds to the processing procedure of fig. 4.
In step S601, the UE transmits uplink data including a preamble in an nth subframe in a resource unit allocated for unlicensed transmission. In step S602, the UE will attempt to receive the unlicensed feedback within the feedback window, i.e., from the (n +1) th subframe to the (n + k) th subframe, and perform corresponding processing. The size k of the feedback window is set by the system. For the resource unit used by the UE, in step S603, if the UE receives the feedback information seven on the feedback resource corresponding to the resource unit performing the unlicensed uplink transmission by the UE, the UE performs step S606 to further detect whether the feedback information seven has the preamble ID of the UE, and if not, the UE performs step S14 to perform retransmission in a random backoff manner; if there is a preamble ID of itself, the UE performs step S607 to transmit uplink data, i.e., data information, in a resource unit allocated for the unlicensed transmission. Next, in step S608, the UE detects the feedback information, in step S609, the UE receives the feedback information five, the UE continues to perform step S611 to detect whether there is its own user ID, and if not, the UE performs step S613 to perform retransmission in a fixed offset manner. If the UE detects that it has its own user ID, the UE performs step S612, and then the UE knows that its transmission in the nth subframe is successful and does not need to perform data retransmission. If the UE detects the feedback information in step S608, the UE receives the feedback information six in step S610, and the UE performs step S613 to perform retransmission in a fixed offset manner. If the UE receives feedback information eight on the feedback resource corresponding to the resource unit for the unlicensed uplink transmission in step S604, the UE performs step S614 to perform retransmission in a random backoff manner in step S602; in step S605, if the UE receives the feedback information nine on the feedback resource corresponding to the resource unit for the unlicensed uplink transmission, the UE performs step S614 to perform retransmission in a random backoff manner.
Fig. 7 is a block diagram illustrating an exemplary network-side device structure based on feedback of resource units. The network-side device 700 may be or may be implemented, for example, in the embodiments described above in connection with fig. 3 or fig. 4.
The network side device 700 includes a receiving unit 701 configured to receive uplink data, including a received preamble and/or user data information, sent on a resource unit for unlicensed transmission from at least one user terminal; the data processing unit comprises a preamble detection unit 702 and a data information decoding unit 704, the preamble detection unit 702 is configured to detect the preamble; the data information decoding unit 704 is configured to decode the data information; the determining unit 703 is configured to determine whether the data information needs to be decoded according to the detection result of the preamble detecting unit; a feedback unit 705 configured to send feedback information on a feedback resource for unlicensed transmission feedback corresponding to a resource unit for unlicensed transmission according to the data processing result.
Fig. 8 is a block diagram illustrating an exemplary structure of a user terminal for feedback based on resource units. The user terminal 800 may be or may be implemented, for example, in the embodiments described above in connection with fig. 5 or fig. 6.
The user terminal 800 includes a transmitting unit 801 configured to transmit uplink data including a preamble and/or data information in a resource unit for unlicensed transmission; a receiving unit 802, configured to receive feedback information sent from a network side device on a feedback resource for unlicensed transmission feedback corresponding to the resource unit for unlicensed transmission; the preamble ID detection unit 803 is configured to detect whether or not the own preamble is received; the user ID detection unit 804 is configured to detect whether an own user ID is received; a retransmission unit 805 configured to retransmit the uplink data that has been sent according to the feedback information; or not retransmitted.
The inventive scheme can effectively reduce the overhead of the feedback signaling of the unlicensed transmission, because the preamble ID and the UE ID are not necessary information elements in the feedback signaling, and only under the condition of indicating the successful data transmission, the UE-ID is required to be included. Under a specific scene, the invention can send quick feedback and effectively reduce time delay. And the retransmission is indicated in a fixed offset or random backoff mode, so that the collision can be reduced, and the HARQ combining condition can be achieved under a proper condition.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. Furthermore, it will be obvious that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. Several elements recited in the apparatus claims may also be implemented by one element. The terms first, second, etc. are used to denote names, but not any particular order.

Claims (41)

1. A feedback method for unlicensed transmission based on resource units, comprising:
the method comprises the steps that network side equipment receives uplink data which are sent on a resource unit used for unlicensed transmission from at least one user terminal;
the network side equipment performs data processing on the uplink data;
the network side device sends feedback information on the feedback resource for the feedback of the non-permitted transmission corresponding to the resource unit for the non-permitted transmission according to the data processing result,
the uplink data comprises a lead code and data information of at least one user terminal; the network side equipment performs data processing on the uplink data, including preamble detection, and according to the detection result of the preamble, the network side equipment judges whether the data information needs to be decoded, if the data information needs to be decoded, the network side equipment further decodes the data information,
when the network side equipment detects the lead codes of the uplink data, at least two lead codes are detected, and the network side equipment judges that the data information cannot be correctly decoded, the network side equipment does not decode the data information, and sends feedback information III on the feedback resource for the non-permission transmission feedback, wherein the feedback information III is used for indicating the user terminal sending the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode.
2. The method of claim 1, wherein the sending, by the network side device, the feedback information on the feedback resource for the feedback of the unlicensed transmission according to the data processing result comprises:
when the network side equipment detects the lead code of the uplink data, at least one lead code is detected, and the data information of at least one user terminal is successfully decoded, the network side equipment sends feedback information I on the feedback resource for the non-permission transmission feedback;
when the network side equipment detects the lead codes of the uplink data, detects at least one lead code, decodes the data information but fails to successfully decode the data information, and the network side equipment sends feedback information II on the feedback resources for the non-permission transmission feedback;
and when the network side equipment detects the lead code of the uplink data and cannot detect the lead code, the network side equipment does not decode the data information and sends feedback information IV on the feedback resource for the non-permission transmission feedback.
3. The method as claimed in claim 2, wherein when the network side device is sending the feedback information, it further sends the user ID information that is decoded correctly to obtain the data information.
4. The method of claim 3, wherein the feedback information is used to indicate that the ue transmitting uplink data in the resource unit for unlicensed transmission and correctly decoding data information does not need to retransmit the uplink data, and the ue transmitting uplink data in the resource unit for unlicensed transmission and not correctly decoding data information retransmits the uplink data; the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data; and the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data.
5. The method of claim 3, further comprising the feedback information one is further used for indicating that the uplink data is retransmitted in a fixed offset manner by the user terminal which sends the uplink data on the resource unit for the unlicensed transmission and has not correctly decoded the data information; the second feedback information is also used for instructing a user terminal which sends uplink data on a resource unit for unlicensed transmission to retransmit the uplink data in a fixed offset manner; the feedback information is further used for instructing the user terminal sending the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode.
6. The method according to claim 1, wherein when the network side device sends the first feedback information, the network side device sends the first feedback information at a fixed time offset from a current subframe in which the uplink data is received; when the network side equipment sends the second feedback information, the network side equipment sends the second feedback information at a fixed time offset from the current subframe receiving the uplink data, and when the network side equipment sends the third feedback information, the network side equipment sends the second feedback information at the next subframe receiving the uplink data; and when the network side equipment sends the feedback information IV, the network side equipment sends the feedback information IV in the next subframe which receives the uplink data.
7. The method of claim 1, wherein the uplink data comprises data information of at least one user terminal; the network side equipment performs data processing on the uplink data, namely decoding data information, and if the network side equipment successfully decodes the data information of at least one user terminal, the network side equipment sends feedback information V on the feedback resource for the non-permission transmission feedback; and if the network side equipment cannot successfully decode the data information from the user terminal, the network side equipment sends feedback information six on the feedback resource for the non-permission transmission feedback.
8. The method of claim 7, further comprising the network side device receiving a preamble from at least one ue and performing preamble detection before receiving uplink data from the at least one ue, which is sent in resource units used for unlicensed transmission.
9. The method according to claim 8, wherein if the network side device correctly detects the preamble, the network side device sends feedback information seven and the detected preamble ID to instruct the ue that sent the preamble ID to send the uplink data information.
10. The method as claimed in claim 7, wherein when the network side device is sending the feedback information five, the user ID information correctly decoded out the data information is further sent.
11. The method of claim 10, wherein the feedback information is used to indicate that the ue correctly decoded data information does not need to retransmit the uplink data; the feedback information six is used for instructing the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data.
12. The method of claim 11, wherein the network side device sends feedback information five or feedback information six at a fixed time offset from a current subframe in which the uplink data is received; and the network side equipment sends feedback information seven in a feedback window of the preamble code received by the user terminal.
13. A feedback method for unlicensed transmission based on resource units, comprising:
the user terminal sends uplink data on a resource unit for unlicensed transmission;
receiving feedback information sent by the network side equipment on the feedback resource for the feedback of the non-permitted transmission corresponding to the resource unit for the non-permitted transmission;
according to the feedback information, the user terminal retransmits the transmitted uplink data; or not to retransmit it, or not,
the uplink data comprises a lead code and data information, if the user terminal receives feedback information III, the user terminal retransmits the uplink data in a random backoff mode on a resource unit for non-permission transmission, wherein the feedback information III is sent by the network side equipment when the network side equipment detects the lead code of the uplink data and detects at least two lead codes and judges that the data information cannot be decoded correctly.
14. The method of claim 13, wherein the first and second light sources are selected from the group consisting of a red light source, a green light source, and a blue light source,
if the user terminal receives the first feedback information, the user terminal further detects whether the user ID of the user terminal is received, and if the user ID of the user terminal is received, the user equipment does not perform retransmission operation; if the user ID of the user equipment is not received, the user equipment retransmits the uplink data on a resource unit for unlicensed transmission;
if the user terminal receives the feedback information II, the user terminal retransmits the uplink data on a resource unit for non-permission transmission;
and if the user terminal receives the feedback information IV, the user terminal retransmits the uplink data on the resource unit for the non-permission transmission.
15. The method of claim 14, wherein the first and second light sources are selected from the group consisting of,
if the user terminal receives the first feedback information and does not receive the user ID of the user terminal, the user equipment retransmits the uplink data in a fixed offset mode on a resource unit for unlicensed transmission;
if the user terminal receives the feedback information II, the user terminal retransmits the uplink data on a resource unit for the non-permission transmission in a fixed offset mode;
and if the user terminal receives the feedback information IV, the user terminal retransmits the uplink data in a random back-off mode on the resource unit for the non-permission transmission.
16. The method of claim 13, the uplink data comprising data information.
17. The method of claim 16, wherein the step of selecting the target,
if the user terminal receives the feedback information V, the user terminal further detects whether the user ID of the user terminal is received, and if the user ID of the user terminal is received, the user equipment does not perform retransmission operation; if the user ID of the user equipment is not received, the user equipment retransmits the uplink data on a resource unit for unlicensed transmission;
and if the user equipment receives the feedback information six, the user equipment retransmits the uplink data on the resource unit for the non-permission transmission.
18. The method of claim 17, the user terminal retransmits the uplink data with a fixed offset on a resource unit for unlicensed transmission.
19. The method of claim 16, wherein before the ue transmits uplink data in the resource unit for unlicensed transmission, the method further comprises:
transmitting a preamble;
and receiving feedback information of the preamble from the network side equipment.
20. The method of claim 19, if the ue receives the feedback information seven, the ue further detects whether it receives its preamble ID, and if it receives its preamble ID, the ue transmits the uplink data in resource units for unlicensed transmission; if the user equipment does not receive the preamble ID of the user equipment, the user equipment retransmits a preamble.
21. A network side device, configured to perform feedback of unlicensed transmission based on resource units, the network side device comprising:
a receiving unit configured to receive uplink data transmitted on a resource unit for unlicensed transmission from at least one user terminal;
a data processing unit configured to perform data processing on the uplink data;
a feedback unit configured to transmit feedback information on a feedback resource for unlicensed transmission feedback corresponding to the resource unit for unlicensed transmission according to the data processing result,
the uplink data comprises a lead code and data information of at least one user terminal; the data processing unit comprises a preamble detection unit configured for preamble detection; the network side equipment also comprises a judging unit which is configured to judge whether the data information needs to be decoded or not according to the detection result of the lead code detecting unit; the data processing unit further comprises a data decoding unit configured to decode the data information,
the current guide code detection unit detects at least two lead codes, the judgment unit judges that the data information can not be correctly decoded, the data decoding unit does not decode the data information, the feedback unit sends feedback information III on the feedback resource for the feedback of the non-permission transmission, and the feedback information III is used for indicating a user terminal which sends uplink data on a resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode.
22. The network side device of claim 21, wherein the feedback information sent by the feedback unit is one of:
when the preamble detection unit detects at least one preamble, and the data decoding unit successfully decodes the data information of at least one user terminal, the feedback unit sends a first feedback information on the feedback resource for the feedback of the unlicensed transmission;
when the preamble detection unit detects at least one preamble and the data decoding unit fails to successfully decode the data information, the feedback unit sends feedback information II on the feedback resource for the feedback of the non-permitted transmission;
when the preamble detection unit fails to detect the preamble, the data decoding unit does not decode the data information, and the feedback unit sends feedback information four on the feedback resource for the unlicensed transmission feedback.
23. The network device of claim 22, wherein the feedback unit, when sending the feedback information, is further configured to send user ID information that is correctly decoded to obtain the data information.
24. The network side device according to claim 23, wherein the feedback information is used to indicate that the ue that sends uplink data in the resource unit for unlicensed transmission and is correctly decoded data information does not need to retransmit the uplink data, and the ue that sends uplink data in the resource unit for unlicensed transmission and is not correctly decoded data information retransmits the uplink data; the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data; and the feedback information is used for indicating the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data.
25. The network side device of claim 22, further, the feedback information one is further used to indicate that a ue that transmits uplink data in a resource unit for unlicensed transmission and has not correctly decoded data information retransmits the uplink data in a fixed offset manner; the second feedback information is also used for instructing a user terminal which sends uplink data on a resource unit for unlicensed transmission to retransmit the uplink data in a fixed offset manner; the feedback information is further used for instructing the user terminal sending the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode.
26. The network side device of claim 21, wherein when the feedback unit is configured to send feedback information one, the feedback unit is configured to send feedback information one at a fixed time offset from a current subframe in which the uplink data is received; when the feedback unit is configured to send feedback information two, the feedback unit is configured to send feedback information two at a fixed time offset from a current subframe receiving the uplink data; when the feedback unit is configured to send feedback information three, the feedback unit is configured to send feedback information three in the next subframe where the uplink data is received; when the feedback unit is configured to send feedback information four, the feedback unit is configured to send feedback information four in the next subframe where the uplink data is received.
27. The network side device according to claim 21, wherein the uplink data includes data information of at least one user terminal; the data processing unit is configured for decoding data information, and if the data processing unit successfully decodes the data information of at least one user terminal, the feedback unit is configured for sending feedback information five on the feedback resource for the feedback of the non-permitted transmission; if the data processing unit cannot successfully decode the data information from the user terminal, the feedback unit is configured to send feedback information six on the feedback resource for the unlicensed transmission feedback.
28. The network device of claim 27, wherein the receiving unit is configured to receive a preamble from at least one ue before receiving uplink data from the at least one ue, which is sent in resource units used for unlicensed transmission, and output the preamble to the preamble detecting unit for preamble detection.
29. The network device according to claim 28, wherein if the preamble detection unit correctly detects the preamble, the feedback unit is configured to send feedback information seven and the detected preamble ID to instruct the ue that sent the preamble ID to send the uplink data information.
30. The network device according to claim 27, wherein the feedback unit is configured to send the feedback information five, and further configured to send the user ID information decoded correctly to obtain the data information.
31. The network side device according to claim 30, wherein the feedback information is used to indicate that the ue correctly decoded out data information does not need to retransmit the uplink data; the feedback information six is used for instructing the user terminal which sends the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data.
32. The network side device of claim 31, wherein the feedback unit is configured to send feedback information five or feedback information six at a fixed time offset from a current subframe in which the uplink data is received; the feedback unit is configured to send feedback information seven within a feedback window of the preamble received from the user terminal.
33. A user terminal for feedback on unlicensed transmissions on a resource unit basis, comprising:
a transmission unit configured to transmit uplink data on a resource unit for unlicensed transmission;
a receiving unit configured to receive feedback information sent from a network side device on a feedback resource for unlicensed transmission feedback corresponding to the resource unit for unlicensed transmission;
a retransmission unit configured to retransmit the transmitted uplink data according to feedback information; or not to retransmit it, or not,
the uplink data comprises a preamble and data information, and if the receiving unit receives feedback information three, the retransmitting unit is configured to retransmit the uplink data in a random backoff manner in a resource unit for unlicensed transmission, wherein the feedback information three is sent by the network side device when the network side device performs preamble detection on the uplink data, detects at least two preambles, and judges that the data information cannot be decoded correctly.
34. The user equipment according to claim 33, further comprising a user ID detection unit configured to, when the receiving unit receives the first feedback information, detect whether to receive the own user ID, and if the own user ID is received, the retransmission unit does not perform the retransmission operation; the retransmission unit is configured to retransmit the uplink data in a resource unit for unlicensed transmission if the own user ID is not received;
if the receiving unit receives the second feedback information, the retransmitting unit is configured to retransmit the uplink data on a resource unit for unlicensed transmission;
if the receiving unit receives the feedback information four, the retransmitting unit is configured to retransmit the uplink data on a resource unit for unlicensed transmission.
35. The user terminal according to claim 34, wherein,
if the receiving unit receives the first feedback information and the user ID detecting unit does not detect the user ID of the receiving unit, the retransmitting unit is configured to retransmit the uplink data in a fixed offset manner in a resource unit for unlicensed transmission;
if the receiving unit receives the second feedback information, the retransmitting unit is configured to retransmit the uplink data in a fixed offset manner on a resource unit for unlicensed transmission;
if the receiving unit receives the feedback information four, the retransmitting unit is configured to retransmit the uplink data in a random backoff manner on a resource unit for unlicensed transmission.
36. The user equipment according to claim 33, wherein the uplink data includes data information.
37. The user terminal according to claim 36, further comprising a user ID detection unit configured to further detect whether an own user ID is received; when the receiving unit receives the feedback information five, if the user ID detection unit detects the user ID of the receiving unit, the retransmission unit does not perform retransmission operation; if the user ID detection unit does not detect the user ID of the user, the retransmission unit is configured to retransmit the uplink data on a resource unit for unlicensed transmission;
if the receiving unit receives the feedback information six, the retransmitting unit is configured to retransmit the uplink data on the resource unit for the unlicensed transmission.
38. The user equipment according to claim 37, wherein the retransmission unit is configured to retransmit the uplink data in a fixed offset manner in resource units used for unlicensed transmission.
39. The ue according to claim 38, wherein the sending unit further comprises a transmitter configured to send a preamble before sending uplink data in resource units for unlicensed transmission; the receiving unit is further configured to receive feedback information of the preamble from the network side device.
40. The user equipment according to claim 39, further comprising a preamble ID detection unit, if the receiving unit receives the feedback information seven, the preamble ID detection unit is configured to further detect whether its own preamble ID is received, and if it receives its own preamble ID, the transmitting unit is configured to transmit the uplink data in resource units for unlicensed transmission; the transmitting unit is configured to retransmit a preamble if its own preamble ID is not received.
41. A resource allocation method in a wireless network comprises a network side device and at least one user terminal, wherein the network side device allocates resource units for the non-permission uplink transmission of the user terminal, and the network side device receives uplink data which is sent on the resource units for the non-permission transmission from the at least one user terminal; and allocating feedback resources for the unlicensed feedback of the network side device, the resource units for the unlicensed uplink transmission of the user terminal having a correspondence with the feedback resources for the unlicensed feedback of the network side device,
the uplink transmission comprises a preamble and data information of at least one user terminal; the network side equipment performs data processing on the uplink data, including preamble detection, and according to the detection result of the preamble, the network side equipment judges whether the data information needs to be decoded, if the data information needs to be decoded, the network side equipment further decodes the data information,
when the network side equipment detects the lead codes of the uplink data, at least two lead codes are detected, and the network side equipment judges that the data information cannot be correctly decoded, the network side equipment does not decode the data information, and sends feedback information III on the feedback resource for the non-permission transmission feedback, wherein the feedback information III is used for indicating the user terminal sending the uplink data on the resource unit for the non-permission transmission to retransmit the uplink data in a random backoff mode.
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