CN109392095A - The method of terminal, base station and information transmission - Google Patents

The method of terminal, base station and information transmission Download PDF

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Publication number
CN109392095A
CN109392095A CN201810142603.3A CN201810142603A CN109392095A CN 109392095 A CN109392095 A CN 109392095A CN 201810142603 A CN201810142603 A CN 201810142603A CN 109392095 A CN109392095 A CN 109392095A
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China
Prior art keywords
scheduling
base station
terminal
information
scheduling mode
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Granted
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CN201810142603.3A
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Chinese (zh)
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CN109392095B (en
Inventor
苏笛
孙霏菲
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Application filed by Beijing Samsung Telecommunications Technology Research Co Ltd, Samsung Electronics Co Ltd filed Critical Beijing Samsung Telecommunications Technology Research Co Ltd
Priority to KR1020207006134A priority Critical patent/KR20200027048A/en
Priority to PCT/KR2018/008766 priority patent/WO2019027262A1/en
Priority to US16/635,983 priority patent/US11317431B2/en
Priority to EP18841342.1A priority patent/EP3646656A4/en
Publication of CN109392095A publication Critical patent/CN109392095A/en
Priority to US17/660,367 priority patent/US11963192B2/en
Priority to US18/636,019 priority patent/US20240284469A1/en
Application granted granted Critical
Publication of CN109392095B publication Critical patent/CN109392095B/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044Arrangements for allocating sub-channels of the transmission path allocation of payload
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1221Wireless traffic scheduling based on age of data to be sent
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1854Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1858Transmission or retransmission of more than one copy of acknowledgement message
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0092Indication of how the channel is divided
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to wireless communication technology fields, specifically provide a kind of method of terminal, base station and information transmission, this method comprises: the configuration information for the first scheduling method that terminal is sent according to base station, judge whether base station supports the first scheduling method, if the first scheduling method is supported in base station, terminal sends request message and/or capabilities message to base station, then terminal receives the scheduling information for the first scheduling method that base station is sent, and according to the scheduling information of the first scheduling method, carries out data and send or receive.The embodiment of the invention provides a kind of method of terminal, base station and information transmission, a kind of new scheduling method is provided, and terminal can carry out data with base station under the new scheduling method and send or receive.

Description

Terminal, base station and information transmission method
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a terminal, a base station, and an information transmission method.
Background
Enhanced Machine Type Communication (eMTC) is a technical Type oriented to applications of the internet of things, is released in a 3GPP protocol earlier than Release 13 version, and is mainly applied to applications of the internet of things deployed in an LTE system.
Compared with the traditional wireless communication service, the internet of things application oriented to the eMTC technology has the characteristics of small data volume, infrequent service request, low time delay sensitivity, deep coverage and the like, and the application types include intelligent meter reading, automatic alarm, city monitoring, logistics tracking and the like.
Compared to LTE terminals, eMTC terminals are more likely to be in deep coverage scenarios, such as basements or underground pipe wells, and therefore eMTC introduces several mechanisms and techniques to enhance coverage. The most fundamental coverage enhancement techniques are to reduce the transmission bandwidth to boost the power spectral density and to introduce a retransmission scheme.
In the aspect of improving the power spectral density, the transmission bandwidth of the eMTC is reduced, and is only 1080kHz, one narrow band of the eMTC is formed by 6 consecutive Physical Resource Blocks (PRBs) in the LTE system, and all Physical channel scheduling of the eMTC takes the eMTC narrow band as a unit. According to different configurations of the LTE system bandwidth, the number and the positions of eMTC narrow bands which can be deployed in the band may be different, for example, when the LTE system bandwidth is 3MHz, the number of the eMTC narrow bands in the band is 2; when the LTE system bandwidth is 20MHz, the number of eMTC narrowband within a band is 16.
In the aspect of Coverage enhancement, in the eMTC technology, a terminal selects a Coverage class (CE Mode) of a random access channel according to downlink measurement, and a base station acquires a Coverage Mode of the terminal based on the Coverage class of the random access channel selected by the terminal and performs transmission of an uplink service channel and a downlink service channel according to the Coverage Mode of the terminal. The coverage modes of the terminal are divided into Mode a (ce Mode a) and Mode b (ce Mode b). The coverage mode A is used for supporting a general coverage scene, namely only supporting no-repeat transmission or transmission with a small number of repeat times of an uplink control channel and a downlink control channel and a service channel; the coverage mode B is used to support a deep coverage scenario, that is, to support the transmission of the uplink and downlink control channels and the traffic channel with a large number of repetitions.
In different coverage modes, the formats of the uplink and downlink scheduling authorization information read by the terminal are slightly different. In Release 14, the uplink scheduling grant information of overlay mode B is DCI format 6-0B, and the content included is shown in table 1:
TABLE 1
The downlink control information format 6-0B indicates, in the Resource Block allocation message, a narrowband index and a Physical Resource Block (PRB) index used for transmission of a Physical Uplink Shared Channel (PUSCH). For the user equipment in the coverage mode B, the base station schedules the uplink shared channel to use single PRB or 2PRB transmission in a narrow band to reduce the uplink power spectral density and improve the coverage capability.
The next generation machine communication system puts higher demands on coverage enhancement, a new coverage mode is generated, but how the terminal and the base station transmit data in the new coverage mode becomes a key problem.
Disclosure of Invention
In order to overcome the above technical problems or at least partially solve the above technical problems, the following technical solutions are proposed:
according to an aspect, an embodiment of the present invention provides a method for data transmission, which is applied to a terminal, and includes:
judging whether the base station supports the first scheduling mode or not according to configuration information of the first scheduling mode sent by the base station;
and the frequency domain scheduling granularity adopted by the first scheduling mode is subcarrier-level scheduling.
If the base station supports a first scheduling mode, a terminal sends a request message and/or a capability message to the base station, wherein the request message is used for requesting the base station to configure the first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal;
and receiving scheduling information which is sent by the base station and used for a first scheduling mode, and sending or receiving data according to the scheduling information of the first scheduling mode.
According to another aspect, the embodiment of the present invention provides another data transmission method, which is applied to a base station, and includes:
broadcasting a configuration message of a first scheduling mode when the base station supports the first scheduling mode;
receiving a request message and/or a capability message sent by a terminal, wherein the request message is used for requesting the base station to configure the first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal;
and if the terminal scheduling mode is the first scheduling mode, transmitting scheduling information of the first scheduling mode to the terminal so that the terminal transmits or receives data according to the scheduling information of the first scheduling mode.
According to yet another aspect, an embodiment of the present invention provides a terminal, including:
the judging module is used for judging whether the base station supports the first scheduling mode or not according to configuration information of the first scheduling mode sent by the base station;
a first sending module, configured to send a request message and/or a capability message to the base station when the base station supports a first scheduling mode, where the request message is used to request the base station to configure the first scheduling mode for the terminal, and the capability message is used to report the scheduling mode supported by the terminal;
a first receiving module, configured to receive scheduling information for a first scheduling mode sent by the base station;
and the data transmission module is used for transmitting or receiving data according to the scheduling information of the first scheduling mode received by the first receiving module.
An embodiment of the present invention provides a base station according to still another aspect, including:
a broadcasting module, configured to broadcast a configuration message of a first scheduling mode when the base station supports the first scheduling mode;
a second receiving module, configured to receive a request message and/or a capability message sent by a terminal, where the request message is used to request the base station to configure the first scheduling mode for the terminal, and the capability message is used to report a scheduling mode supported by the terminal;
and the second sending module is used for sending the scheduling information of the first scheduling mode to the terminal when the terminal scheduling mode is the first scheduling mode, so that the terminal sends or receives data according to the scheduling information of the first scheduling mode.
The invention provides a terminal, a base station and a data transmission method, compared with the prior art, the terminal judges whether the base station supports a first scheduling mode according to configuration information of the first scheduling mode sent by the base station, if the base station supports the first scheduling mode, the terminal sends a request message and/or a capability message to the base station to request the base station to configure the first scheduling mode for the terminal or to report the scheduling mode supported by the terminal, when the base station receives the request message and/or the capability message sent by the terminal and determines that the terminal scheduling mode is the first scheduling mode, the terminal sends the scheduling information of the first scheduling mode to the terminal, and the terminal sends or receives data according to the scheduling information of the first scheduling mode. Compared with the prior art, the invention has a new scheduling mode, namely the first scheduling mode, and when the terminal and the base station both support the first scheduling mode, the base station can send the scheduling information of the first scheduling mode to the terminal, so that the terminal and the base station can send or receive data in the new scheduling mode.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a method for data transmission by a terminal according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for transmitting data by a base station according to an embodiment of the present invention;
fig. 3 is a schematic view of an interaction flow of data transmission performed by a terminal and a base station according to an embodiment of the present invention;
fig. 4 is a terminal flow example diagram illustrating a process of reporting a coverage mode C request (or capability) by a terminal in a manner of combining implicit and explicit modes according to an embodiment of the present invention;
fig. 5 is a diagram illustrating an example of mapping PUSCH physical resources according to an embodiment of the present invention;
fig. 6 is a diagram illustrating a terminal flow when a terminal reports a request (or capability) of a coverage mode C in a hidden manner according to an embodiment of the present invention;
fig. 7 is a diagram illustrating an example of a terminal procedure for reporting a request (or capability) of a coverage mode C in an explicit signaling manner according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As will be appreciated by those skilled in the art, a "terminal" as used herein includes both devices having a wireless signal receiver, which are devices having only a wireless signal receiver without transmit capability, and devices having receive and transmit hardware, which have devices having receive and transmit hardware capable of two-way communication over a two-way communication link. Such a device may include: a cellular or other communication device having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; PCS (Personal Communications Service), which may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (Personal Digital Assistant), which may include a radio frequency receiver, a pager, internet/intranet access, a web browser, a notepad, a calendar and/or a GPS (Global Positioning System) receiver; a conventional laptop and/or palmtop computer or other device having and/or including a radio frequency receiver. As used herein, a "terminal" or "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or situated and/or configured to operate locally and/or in a distributed fashion at any other location(s) on earth and/or in space. As used herein, a "terminal Device" may also be a communication terminal, a web terminal, a music/video playing terminal, such as a PDA, an MID (Mobile Internet Device) and/or a Mobile phone with music/video playing function, or a smart tv, a set-top box, etc.
The next generation machine communication system puts higher requirements on coverage enhancement, and in the standardization project of the next version Release15 of the eMTC, the scheduling of introducing partial PRBs supporting the PUSCH is put forward, namely, the PUSCH is transmitted on a plurality of subcarriers in one PRB, so that the uplink transmission power spectral density is further improved, and the coverage capability is enhanced.
The embodiment of the invention is oriented to an eMTC technology, and aims to further improve the coverage capability of the eMTC and support subcarrier level scheduling. The invention relates to design of downlink control information and design of a user behavior flow.
Fig. 1 is a flowchart illustrating a method for data transmission according to an embodiment of the present invention.
Step 101, the terminal judges whether the base station supports the first scheduling mode according to the configuration information of the first scheduling mode sent by the base station.
The first scheduling mode and the second scheduling mode adopt different frequency domain scheduling granularities, and the frequency domain scheduling granularity adopted by the first scheduling mode is smaller than the frequency domain scheduling granularity adopted by the second scheduling mode.
The frequency domain scheduling granularity adopted by the first scheduling mode is subcarrier-level scheduling.
Step 102, if the base station supports the first scheduling mode, the terminal sends a request message and/or a capability message to the base station.
The request message is used for requesting the base station to configure a first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal.
And 103, the terminal receives scheduling information which is sent by the base station and used for the first scheduling mode, and sends or receives data according to the scheduling information of the first scheduling mode.
Fig. 2 is a flowchart illustrating a data transmission method according to another embodiment of the present invention.
Step 201, when the base station supports the first scheduling mode, the base station broadcasts a configuration message of the first scheduling mode.
The first scheduling mode and the second scheduling mode adopt different frequency domain scheduling granularities, and the frequency domain scheduling granularity adopted by the first scheduling mode is smaller than the frequency domain scheduling granularity adopted by the second scheduling mode.
The frequency domain scheduling granularity adopted by the first scheduling mode is subcarrier-level scheduling.
Step 202, the base station receives a request message and/or a capability message sent by the terminal.
The request message is used for requesting the base station to configure a first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal.
Step 203, if the terminal scheduling mode is the first scheduling mode, the base station sends the scheduling information of the first scheduling mode to the terminal, so that the terminal performs data transmission or reception according to the scheduling information of the first scheduling mode.
Fig. 3 is an interaction flowchart of data transmission between a terminal and a base station according to an embodiment of the present invention.
Step 301, when the base station supports the first scheduling mode, the base station broadcasts a configuration message of the first scheduling mode; step 302, the terminal judges whether the base station supports the first scheduling mode according to the configuration information of the first scheduling mode sent by the base station; step 303, if the base station supports the first scheduling mode, the terminal sends a request message and/or a capability message to the base station, wherein the request message is used for requesting the base station to configure the first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal; step 304, the base station receives a request message and/or a capability message sent by the terminal, wherein the request message is used for requesting the base station to configure a first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal; 305, if the terminal scheduling mode is the first scheduling mode, the base station sends scheduling information of the first scheduling mode to the terminal, so that the terminal sends or receives data according to the scheduling information of the first scheduling mode; step 306, the terminal receives the scheduling information for the first scheduling mode sent by the base station, and sends or receives data according to the scheduling information of the first scheduling mode.
The frequency domain scheduling granularity adopted by the first scheduling mode is subcarrier-level scheduling.
Further, the scheduling mode includes an overlay mode.
Further, the configuration information of the first scheduling mode includes:
an indication message that the base station supports the first scheduling mode; and/or a Physical Random Access Channel (PRACH) coverage level configuration message corresponding to the first scheduling mode;
the PRACH coverage level configuration message corresponding to the first scheduling mode comprises at least one of the following messages:
the PRACH transmission repetition times; a leader sequence index; PRACH frequency modulation offset; a machine type communication Physical Downlink control channel (MTC Physical Downlink control channel, MPDCCH) search space offset; a Reference Signal Receiving Power (RSRP) threshold corresponding to the PRACH coverage level.
Further, before step 305, the method further includes: the terminal receives a confirmation message sent by the base station, wherein the confirmation message is used for informing the terminal, and then the first scheduling mode is adopted for scheduling; and/or the terminal receives the scheduling mode configuration information sent by the base station and determines the subsequent scheduling mode adopted by the base station according to the scheduling mode configuration information.
Further, step 306 includes: the terminal monitors downlink control information of a first scheduling mode sent by the base station, wherein the downlink control information comprises downlink control information of a first format and downlink control information of a second format, the downlink control information of the first format is used for bearing uplink authorization information, and the downlink control information of the second format is used for bearing downlink authorization information; and the terminal performs uplink transmission according to the downlink control information of the first format and/or performs downlink reception according to the downlink control information of the second format.
Further, the step of "the terminal sends a configuration request message and/or a capability message to the base station" in step 303 includes: the terminal determines the PRACH coverage level; if the scheduling mode corresponding to the PRACH coverage level is the first scheduling mode, carrying a configuration request message and/or a capability message in a random access request message sent to the base station; and if the scheduling modes corresponding to the PRACH coverage level comprise at least two scheduling modes, carrying a configuration request message and/or a capability message in a connection establishment request message sent to the base station.
The at least two scheduling modes include a first scheduling mode.
Specifically, the terminal determines the coverage level of the PRACH; if the scheduling mode corresponding to the PRACH coverage level is the first scheduling mode, the step of carrying a configuration request message and/or a capability message in a random access request message sent to the base station specifically includes: the terminal determines the PRACH coverage grades of a first scheduling mode and a second scheduling mode in the at least two scheduling modes according to the downlink measurement result, and receives and reads the content of the random access response message according to the second coverage mode, wherein at least one PRACH coverage grade of the second coverage mode is the same as the PRACH coverage grade of the first coverage mode; the terminal sends a connection establishment request message to the base station, wherein the connection establishment request message carries a configuration request message and/or a capability message.
Specifically, the terminal determines the coverage level of the PRACH; if the scheduling mode corresponding to the PRACH coverage level includes at least two scheduling modes, the step of carrying a configuration request message and/or a capability message in a connection establishment request message sent to the base station includes:
and the terminal determines the PRACH coverage level of the first scheduling mode according to the downlink measurement result, and sends a random access request message to the base station according to the configuration information of the PRACH coverage level, wherein the random access request message carries the configuration request message and/or the capability message.
Further, the step of "the terminal sends a configuration request message and/or a capability message to the base station" in step 303 specifically includes: a terminal sends a connection establishment request message to a base station, wherein the connection establishment request message carries a configuration request message and/or a capability message; or, if the terminal and the base station have established connection, sending a configuration request message and/or a capability message to the base station.
Further, the step of the terminal performing uplink transmission according to the downlink control information in the first format includes: and acquiring the resource allocation message from the downlink control information in the first format, and performing uplink transmission according to the resource allocation message.
Wherein the resource allocation message includes at least one of the following:
narrowband indication information; physical resource block PRB indication information; subcarrier indication information; the number of resource units indicates information.
Further, if the resource allocation message obtained from the downlink control information in the first format includes a subcarrier indication message and does not include a PRB indication message, the terminal determines a subcarrier and a PRB corresponding to the current uplink transmission according to the subcarrier indication message; and/or if the resource allocation message acquired from the downlink control information in the first format contains a subcarrier indication message and does not contain resource unit number indication information, the terminal determines the subcarrier corresponding to the current uplink transmission and the resource unit number according to the subcarrier indication message.
Further, the terminal determines at least one of narrowband information, PRB information, subcarrier information, and the number of resource elements used for uplink transmission according to system preset information and/or a received radio resource control RRC signaling indication message.
Further, the step of the terminal performing uplink transmission according to the resource allocation message includes:
the terminal determines the size of a transmission block according to the subcarrier information and the number of resource units acquired from the resource allocation message; and performs uplink transmission based on the transport block size.
Further, the terminal obtains Hybrid Automatic Repeat request-Acknowledgement (HARQ-ACK) resource information from the downlink control information in the second format, and performs uplink transmission of an Acknowledgement character ACK according to the HARQ-ACK resource information; or, the terminal acquires hybrid automatic repeat request Acknowledgement (HARQ-ACK) resource information from the downlink control information of the second format, and performs Non-Acknowledgement (NACK) uplink transmission according to the HARQ-ACK resource information.
Wherein the HARQ-ACK resource information comprises at least one of: HARQ-ACK resource offset information; HARQ-ACK transmission repetition number indication information; HARQ-ACK scheduling delay indication information; sub-carrier indication information for HARQ-ACK transmission.
Compared with the prior art, the terminal in the embodiment of the present invention determines whether a base station supports a first scheduling mode according to configuration information of the first scheduling mode sent by the base station, if the base station supports the first scheduling mode, the terminal sends a request message and/or a capability message to the base station to request the base station to configure the first scheduling mode for the terminal, or is used for reporting the scheduling mode supported by the terminal, when the base station receives the request message and/or the capability message sent by the terminal and determines that the terminal scheduling mode is the first scheduling mode, the terminal sends the scheduling information of the first scheduling mode to the terminal, and the terminal sends or receives data according to the scheduling information of the first scheduling mode. That is, in the embodiment of the present invention, compared with the prior art, a new scheduling mode, that is, a first scheduling mode appears in the embodiment of the present invention, and when both the terminal and the base station support the first scheduling mode, the base station may send scheduling information of the first scheduling mode to the terminal, so that the terminal and the base station can send or receive data in the new scheduling mode.
Specifically, the scheduling mode may include a coverage mode, the second scheduling mode may be a scheduling mode supported in the prior art corresponding to the present application, such as a coverage mode B and/or a coverage mode a, and the new scheduling mode appearing in the embodiment of the present invention, that is, the first scheduling mode, may be a user coverage mode supporting subcarrier-level scheduling, such as a coverage mode C.
For the purpose of this application, this application proposes an implementation method of an eMTC system supporting subcarrier-level scheduling, which includes the following steps 401-403 (not shown in the figure),
Step 401: the terminal reads configuration information of the system on the overlay mode supporting the subcarrier level scheduling.
Step 402: and after the terminal acquires the configuration information of the coverage mode supporting subcarrier level scheduling, reporting a configuration request or capability.
Step 403: the terminal acquires the coverage mode supporting subcarrier level scheduling, monitors the downlink control information format of the coverage mode and carries out uplink and downlink transmission.
Wherein, the method for the terminal to obtain the coverage mode is that the terminal receives an Acknowledgement Character (ACK) of a report configuration request or capability; or, the terminal receives the coverage mode scheduling information of the base station.
Example one
To achieve the object of the present application, the following describes a design scheme of downlink control channel information of an eMTC system supporting uplink subcarrier level scheduling.
Note that the user coverage mode supporting different scheduling granularity from existing coverage mode a and coverage mode B is coverage mode C. For coverage mode a and/or coverage mode B users, configuring coverage mode C means that smaller scheduling granularity, e.g., subcarrier-level scheduling, can be supported. Thus, overlay mode C may be considered an extended overlay mode based on existing overlay mode a and/or overlay mode B. And recording the format of the downlink control information of the coverage mode C as 6-0C. When the users in the coverage mode a and the coverage mode B can both configure the coverage mode C, the coverage mode C can support two different downlink control information formats for uplink grant, which are respectively used for supporting the transmission of the smaller scheduling granularity of the user in the coverage mode a and the transmission of the smaller scheduling granularity of the user in the coverage mode B.
To support the subcarrier-level scheduling of the PUSCH, the terminal needs to obtain the following scheduling information, as shown in table 2:
TABLE 2
For the embodiment of the present invention, since the bit width of the downlink control information is limited, all the information cannot be indicated in the resource allocation information, a part of the information can be indicated in the downlink control information, and the rest of the information that cannot be indicated in the downlink control information needs to be indicated by the RRC signaling for semi-static indication or implicitly indicated by some system rule. Specific contents and signaling transmission modes of each configuration information in table 2 are given below, respectively, and the scheduling parameter configuration mode may be used for subcarrier-level scheduling when the overlay mode C supports overlay mode a and/or overlay mode B configuration, and may also be used for an overlay mode supporting subcarrier-level scheduling when the overlay mode C is an independently configured overlay mode. Meanwhile, the following method for indicating scheduling information may also be used for random access, so as to support subcarrier-level scheduling of a connection establishment request Message (Message 3) in a random access process.
1) Narrow band indication
The content and the bit number can multiplex the indication mode in the existing downlink control information format 6-0B, and the narrowband indication information can indicate in the downlink control information, and can also indicate through RRC signaling, or the system appoints that the uplink transmission of the coverage mode C user uses a fixed narrowband (in an implicit indication mode, without indication bits).
2) PRB indication
The content and the bit number can be indicated by multiplexing the indication mode in the existing downlink control information format 6-0B or by combining with the subcarrier, and the specific mode can be seen in the following subcarrier indication part. The PRB indication information may be indicated in the downlink control information, and may also be indicated by RRC signaling, or the system promises that the uplink transmission of the coverage mode C user uses a fixed PRB in the indicated narrowband (in an implicit indication manner, without an indication bit).
3) Subcarrier indication
The subcarrier indication content may only include the subcarrier index used by the PUSCH channel transmission, the index of the PRB in which the subcarrier is located is configured by the PRB indication information, or the PRB located in the indicated narrowband using a fixed position. More specifically, if the number of PRBs allocated by the PRB indication may be 1 or more, the terminal determines whether to further read the subcarrier indication field according to a certain rule, for example, only when the number of allocated PRBs is 1, the terminal reads the subcarrier indication field, and determines the subcarrier position allocated to the transmission of the physical uplink shared channel on the allocated PRBs according to the subcarrier indication. Table 3 gives several examples of the subcarrier indication content in this case:
TABLE 3(a)
TABLE 3(b)
Sub-carrier indication field (I)sc) Allocable set of subcarriers (n)sc)
0–9 Isc+1
10-13 3(Isc-10)+{0,1,2}
14-15 6(Isc-14)+{0,1,2,3,4,5}
Table 3(c)
Table 3(d)
TABLE 3(e)
Wherein, tables 3(a) and 3(b) respectively use 5 bits and 4 bits to indicate a plurality of states of single subcarrier, 3 subcarriers and 6 subcarriers scheduling; table 3(c) indicates several states of 3 subcarrier scheduling, 6 subcarrier scheduling and 12 subcarriers with 3 bits; table 3(d) indicates several states of single subcarrier, 3 subcarriers, 6 subcarriers, 12 subcarrier scheduling (single PRB) and 2PRB scheduling with 5 bits; table 3(e) indicates several states of 3 subcarriers, 6 subcarriers, 12 subcarrier scheduling and 2PRB scheduling with 3 bits. Compared with 3(a), when 3(b) does not contain single subcarriers, a plurality of subcarriers with poor performance are positioned at two ends of PRB.
For the embodiment of the present invention, the subcarrier index allocated to the PUSCH transmission and the PRB index may also be jointly indicated, and at this time, the PRB index does not need to be additionally indicated, for example, table 4 gives an example of the indication content in this case, where the example jointly indicates several states of single subcarrier, 3 subcarriers, 6 subcarriers, 12 subcarrier scheduling, and 2PRB scheduling with 6 bits, and the position of the scheduled subcarrier may be located on any PRB within one narrow band according to the indication. Table 4 may also only reserve subcarrier indication fields 0 to 35, and only jointly indicate several states of single subcarrier, 3 subcarriers, 6 subcarriers, and 12 subcarriers scheduling.
TABLE 4
The specific states included in each scheduling case in each of the examples in tables 3 and 4 may be increased or decreased according to the number of bits.
For the embodiment of the present invention, the subcarrier indication information may be indicated in the downlink control information, and may also be indicated by RRC signaling.
4) Resource unit number indication and modulation coding mode indication
The terminal needs to acquire the number of resource units, a modulation coding mode and the number of transmission block bits, wherein the number of transmission block bits acquired by the terminal can be indexed by the number of resource units and/or the size of the transmission block; the resource unit number can be obtained by downlink control information configuration or transmission block size index.
Specifically, the implementation manner of obtaining the transport block size and the number of resource units may preferably be that a user obtains a transport block size index by looking up a table according to a modulation coding scheme index indicated by the downlink control information, and obtains a bit number and a resource unit number of the transport block size by looking up the table according to the transport block size index, where an example is shown in table 5, 16 modulation coding schemes are indicated by 4 bits in the downlink control information, and 16 transport block sizes correspond to each other, and the configured number of resource units can be obtained according to a correspondence relationship between the modulation coding scheme index/the transport block size index and the resource unit number.
TABLE 5
The implementation manner of obtaining the size of the transport block may preferably be that the user obtains the modulation and coding scheme index and the resource unit number index respectively, and obtains the transport block size index I by looking up the table according to the modulation and coding scheme indexTBSAccording to transport block size index ITBSAcquiring the size of a transmission block according to the number of configured resource units, wherein the modulation coding mode index can be explicitly indicated through downlink control information, for example, an existing indication mode of multiplexing downlink control information format 6-0B; the indication mode of the resource unit number index may be explicit indication in the downlink control information, and the terminal obtains the configured resource unit number through table lookup according to the resource unit number index, for example, indicating 6 configurable resource unit numbers {1,2,3,4,5,6} with 3 bits, and then configuring the resource unit number with 3 bits can support the transport block sizes supported by all coverage modes a with the same coding efficiency (when the bandwidth capability of the user is 1.4 MHz); or, 4 kinds of configurable resource units {1,2,4,6} are indicated by 2 bits, the resource units can be configured by 2 bitsThe same coding efficiency supports the size of the transmission block supported by most coverage mode A (when the bandwidth capability of a user is 1.4MHz), and the granularity of the subcarrier-level scheduling transmission time length is kept equivalent to that of the coverage mode A; or, 1 bit is used to indicate the number of 2 resource units, for example, bit 0 indicates that the number of resource units is 1, and bit 1 indicates that the number of resource units is 2, then the number of resource units configured by 1 bit can support the transport block sizes supported by all coverage modes B with the same coding efficiency; or, the terminal obtains the resource unit number configuration according to the corresponding relationship between the number of the scheduled subcarriers and the number of the resource units, for example, the number of the resource units used by single subcarrier scheduling/3 subcarrier scheduling/6 subcarrier scheduling is 2, and the number of the resource units used by single PRB scheduling/2 PRB scheduling scenarios is 1.
For the embodiment of the invention, the terminal acquires the size of the transmission block according to the subcarrier indication and the resource unit number indication. If the downlink control information format 6-0C includes the scheduling condition of 2PRB and/or single PRB, it may be defined that the number of resource units is greater than 1 as an invalid indication (the number of resource units may be defined as 1ms in the case of 2PRB scheduling), and the size of the transport block may be obtained according to the indication mode of the downlink control information format 6-0B.
For the embodiment of the present invention, the resource unit number indication information may also be indicated by RRC signaling, in addition to the indication in the downlink control information.
5) Repeat count indication/transmission subframe number indication
The terminal needs to obtain the repeated frequency configuration of PUSCH transmission; or, the configuration of the number of transmission subframes is obtained, and the terminal can obtain the repetition times according to the configured number of the transmission subframes.
The indication manner of the repetition times may be that the terminal obtains the configured repetition times according to the repetition time index and other configuration parameters, where the other configuration parameters at least include one of the following information, the maximum repetition times of the PUSCH, the number of subcarriers, and the number of resource elements. The maximum number of repetitions of PUSCH may be configured by a higher layer, for example, in the prior art, the higher layer configuration parameter in the overlay mode B is "PUSCH-maxnumrepottitioncemodeb", the higher layer configuration parameter in the overlay mode B is "PUSCH-maxnumrepottincecemodea", and the overlay mode C may use the configuration parameters of the overlay mode a and/or the overlay mode B, or define a unique higher layer parameter.
The method for the terminal to obtain the number of repetitions may preferably be that the terminal obtains the number of repetitions according to a repetition index, a PUSCH maximum repetition number, a number of subcarriers, and/or a number of resource elements. Specifically, the terminal may obtain the repetition number set according to the configured PUSCH maximum repetition number, and set to { n }0,n1,…,nKAnd determining a correction factor β of the repetition times according to the number of the sub-carriers and/or the number of the resource units, and setting the terminal to acquire the repetition time index as i belonging to [0, K ]]If the terminal obtains the configured repetition number [ β n ]i]The determination method of the value of the correction factor β may preferably be determined by the number of subcarriers and the number of resource units, and the calculation formula of β may beWherein N isRUIs the number of subcarriers, LRUFor the resource unit length (in milliseconds), for example, for the case of 3 subcarriers, the resource unit length is 4 milliseconds, when the number of allocated resource units is 2, a single transport block occupies 2 × 4 to 8 milliseconds in the time domain, and the time domain is extended by 8 times with respect to the transmission of PRB level frequency domain scheduling granularity, so that β to 1/8, table 6(a) gives the values of the correction factors under the combination of several typical subcarrier numbers and resource unit numbers, the determination method of the value of the correction factor β is preferably also determined by the number of subcarriers, and the calculation formula of β may be thatWherein L isRUTable 6(b) gives the values of the correction factor for a number of typical subcarriers for the length of the resource element (in milliseconds). Or, specifically, the manner of acquiring the repetition number by the terminal according to the repetition number index, the PUSCH maximum repetition number, the number of subcarriers, and/or the number of resource elements may be that after acquiring the configuration parameter PUSCH maximum repetition number, the terminal acquires the configuration parameter PUSCH maximum repetition number and then acquires the configuration parameter PUSCH maximum repetition number according to the number of subcarriersAnd acquiring a correction factor β according to the number and/or the resource unit number, and correcting the acquired maximum repetition number, wherein the correction method and the acquisition method of the correction factor are the same as the previous example, as shown in table 6(a) and table 6 (b).
Watch 6(a)
Watch 6(b)
Number of subcarriers 3 6
β 1/4 1/2
The method for the terminal to obtain the number of repetitions may also be preferably that the terminal obtains the number of repetitions according to a repetition index, a number of subcarriers, and/or a number of resource units. Specifically, the terminal may obtain the repetition number set according to the number of subcarriers and/or the number of resource elements, and set the repetition number set as { n0,n1,…,nKAnd setting the terminal acquisition repetition index as i belongs to [0, K ]]If the terminal obtains the configured repetition number ni. The method for determining the repetition number set by the terminal may preferably be that the terminal obtains the repetition number set according to a correspondence between a combination of the number of subcarriers and the number of resource units and the repetition number set, for example, when the number of subcarriers is 3 and the number of resource units is 2, the repetition number set is {1,4,8,16,32,64,128,256 }; and when the number of subcarriers is 3 and the number of resource units is 4, the set of repetition numbers is {1,2,4,8,32,64,96,128 }. Or, the method for the terminal to determine the repetition number set may also be, preferably, that the terminal obtains the repetition number set according to a correspondence between the number of subcarriers and the repetition number set, for example, when the number of subcarriers is 3, the repetition number set is {1,2,4,8,32,64,96,128 }; and when the number of subcarriers is 6, the repeated number set is {1,4,8,16,32,64,128,256 }.
The two indication manners may be combined with each other, for example, the terminal determines the manner of obtaining the repetition number according to the value of the number of subcarriers and/or the number of resource units, as shown in table 7, when the number of subcarriers is 3 and the number of resource units is 1, or the number of subcarriers is 6 and the number of resource units is {1,2}, the terminal obtains the repetition number according to the repetition number index, the maximum repetition number of the PUSCH, the number of subcarriers, and the number of resource units; otherwise, the repetition times are obtained according to the repetition time index, the number of subcarriers, and the number of resource units, and the specific method is as described above.
TABLE 7
Another configuration to accomplish the same purpose is: the terminal acquires the indication of the number of subframes for PUSCH transmission, and the configured number of transmission subframes can be an integral multiple or a non-integral multiple of the number of subframes used for PUSCH transmission once.
The method for indicating the number of subframes for acquiring the PUSCH transmission by the terminal may be that the terminal acquires the configured PUSCH transmission subframe number according to the transmission subframe number index configuration and the PUSCH maximum transmission subframe number configuration, where the configured transmission subframe number may be an integer multiple or a non-integer multiple of the number of subframes used for PUSCH transmission once. The transmission subframe number index and the repetition index share the same indication domain of the downlink control information, that is, when the coverage mode of the terminal is the coverage mode C and/or the number of subcarriers allocated to the PUSCH resource acquired by the terminal is less than the number of subcarriers of one physical resource block, the indication acquired by the terminal through the indication domain is the transmission subframe number index; otherwise, the indication obtained by the terminal through the indication field is the repeat index. Similarly, the maximum transmission subframe number indication may share the same RRC indication field as the maximum repetition number indication, or the maximum transmission subframe number indication may be an independent RRC information element for subcarrier level transmission. When the indication of the maximum transmission subframe number and the indication of the maximum repetition number can share an RRC indication domain, if the coverage mode of the terminal is a coverage mode C and/or the number of subcarriers allocated to the PUSCH resource acquired by the terminal is less than the number of subcarriers of one physical resource block, the indication acquired by the terminal through the RRC indication domain is the indication of the maximum transmission subframe number; otherwise, the indication obtained by the terminal through the indication field is the maximum repetition number.
The number of PUSCH transmission subframes acquired by the terminal may be an integral multiple or a non-integral multiple of the number of subframes used for PUSCH transmission once, and the following describes a process in which the terminal performs physical resource mapping according to the configuration of the number of transmission subframes. The PUSCH may be mapped on one or more resource units, denoted NRUEach resource unit is transmitted at least repeatedly
Wherein,the number of subframes of the PUSCH transmission acquired for the terminal,is the number of time slots that a resource unit contains,indicating a rounding down. PUSCH repeat transmissionThe secondary physical resource mapping may be the same as NB-IoT terminals or bandwidth limited/coverage enhanced terminals (BL/CE UEs) in existing protocols. Immediately thereafter, repeatedly transmittingNext, the PUSCH is preceded byThe transmission is repeated once for each sub-frame, wherein,
as in PUSCH resource mapping method two in fig. 5; or in repeated transmissionNext, a single transmission of PUSCH is preceded byAnd repeatedly sending each subframe once, as shown in the first PUSCH resource mapping method in fig. 5. When on PUSCHThe repeated transmission adopts cyclic repetition, namely each subframe of the PUSCH single transmission is continuously and repeatedly transmitted for a plurality of timesNext repetition is performed again (NB-IoT NPUSCH physical resource mapping method), the two PUSCH resource mapping methods have different effects, and fig. 5 shows schematic diagrams of the two resource mapping methods.
For the embodiment of the present invention, if the bit width of the downlink control information format 6-1C (for downlink grant) is enlarged, the extra bits may be used to indicate other HARQ-ACK resource configurations except for the HARQ-ACK resource offset (HARQ-ACK resource offset), which may include one or more items of configuration information in table 8:
TABLE 8
The specific indication content of the 3 pieces of configuration information may reuse existing eMTC signaling content or configuration content in NB-IoT downlink control information format N1.
Examples of sets of complete downlink control information format 6-0C configuration messages are given below.
An example is given in table 9, where the control information format of format 6-0C has a fixed total number of bits, which is the same as the maximum number of bits of the uplink grant information of overlay mode B (when the system bandwidth is 20 MHz), for supporting subcarrier-level scheduling for overlay mode B users. The downlink control information indicates the PRB index and the subcarrier index in a joint indication mode, and the indication of the narrowband index needs to be notified in a quasi-static mode through RRC signaling. In this example, uplink scheduling for coverage mode C terminals may cover subcarrier-level scheduling, and cover both single PRB and 2PRB scheduling cases for mode B. At this time, the coverage mode C may be the coverage mode B extended under the new protocol version, and when both the base station and the terminal support the coverage mode C, the terminal does not need to be configured to the coverage mode B. Meanwhile, the uplink authorization information of the coverage mode C, namely the downlink control information format 6-0C, does not indicate the narrowband index any more, so the total bit number does not change according to the bandwidth of the LTE system any more. Although the downlink grant information of the overlay mode C, i.e. the signaling content of the downlink control information format 6-1C, can reuse the overlay mode B, the total bit number needs to be completed according to the LTE system bandwidth, as shown in table 10.
TABLE 9
Watch 10
In the resource allocation configuration in table 9, the subcarrier index may also be indicated by using a smaller number of bits, for example, in table 3(e), and at this time, both the PRB index indication and the narrowband indication may be quasi-statically configured through RRC signaling. At this time, if the downlink control information format 6-1C still can use the configuration parameters completely same as the configuration parameters of the format 6-1B, the total bit number of the downlink control information format 6-0C is the same as the minimum bit number of the format 6-1C (when the system bandwidth is 3 MHz), and when the system bandwidth is greater than 3MHz, bit completion needs to be performed on the downlink control information format 6-0C, so that the total bit number of the uplink and downlink authorization information is the same.
For the embodiment of the present invention, another example of the downlink control information format 6-0C configuration message is given below, which is used to support subcarrier level scheduling of coverage mode B users. Table 9 may be reused for the rest of the downlink control information except for resource allocation. For the embodiment of the present invention, the resource allocation configuration information of the present example is given in table 11 below. In this example, an additional 3 or 4 bits are introduced for coverage mode C to indicate subcarrier index and/or number of resource elements in the uplink grant information (downlink control information format 6-0C), to indicate HARQ-ACK resources in the downlink grant information (downlink control information format 6-1C), to indicate configuration content in downlink control information format N1 in content multiplexing NB-IoT, and/or to indicate the number of repetitions of HARQ-ACK transmission.
Watch 11(a)
Watch 11(b)
For the embodiment of the present invention, another example of the downlink control information format 6-0C configuration message is given below, which is used to support subcarrier level scheduling of coverage mode a users. And introducing an indication mark of the coverage mode C, wherein the indication mark is used for indicating that the current coverage mode is the coverage mode A or the coverage mode C, and the mark is used for analyzing other indication fields of the downlink control information format 6-0C. The bit number and the specific contents of each pointer field are shown in the following table 12.
TABLE 12
To achieve the objective of the present application, uplink subcarrier level scheduling for coverage mode C users is supported, and a flow design scheme for supporting downlink reception and uplink transmission for coverage mode C users according to coverage mode C is described below. When there are multiple coverage modes supporting subcarrier-level scheduling simultaneously in the system, for example, coverage mode C (which may be extended coverage mode B for supporting subcarrier-level scheduling) and coverage mode D (which may be extended coverage mode a for supporting subcarrier-level scheduling), a corresponding procedure may be formed by replacing coverage mode D in the following description. And reading different downlink control channel formats by the user working in the different coverage modes.
The method comprises the following steps: the terminal reads the configuration information of the overlay mode C.
For the embodiment of the present invention, the configuration message at least includes one of the following contents, 1) an indication message that the System supports overlay mode C, which may be carried in the System message, for example, a Master Information Block (MIB) or a System Information Block (SIB), where the indication message may be a 1-bit enable message or implicitly indicates that the cell supports overlay mode C by indicating a protocol version; 2) the coverage mode C corresponds to PRACH coverage Level (nprachcovercoverage Enhancement Level) configuration, including but not limited to PRACH transmission repetition number, Preamble sequence (Preamble) index, PRACH frequency hopping offset, MPDCCH search space offset, and RSRP threshold corresponding to PRACH coverage Level.
The corresponding relation between the PRACH coverage grade and the coverage mode C is one-to-one corresponding relation, namely when a certain PRACH coverage grade corresponds to the coverage mode C, the corresponding relation is not corresponding to other coverage modes; or, the corresponding relationship between the PRACH coverage levels and the coverage patterns C may also be a one-to-many corresponding relationship, that is, when a certain PRACH coverage level corresponds to a coverage pattern C, it may still correspond to other coverage patterns, such as a coverage pattern a or a coverage pattern B.
Step two: and after the terminal acquires the configuration information of the overlay mode C, reporting a request for configuring the overlay mode C or reporting the capability of supporting the overlay mode C.
For the embodiment of the present invention, the reporting process may include at least one of the following manners, 1) the terminal performs explicit reporting through an RRC signaling, for example, a connection establishment request message (MSG3) carries 1 bit, which is used to indicate that the terminal supports the coverage mode C or configures a coverage mode C request; or, the terminal carries a message when reporting the capability, which is used for indicating that the terminal supports the coverage mode C or configures the coverage mode C request; 2) the terminal reports a request for configuring the coverage mode C to the base station or reports the capability of supporting the coverage mode C in a certain implicit behavior manner according to a system rule, for example, the system rule may be that the base station configures a PRACH coverage level for the coverage mode C, and the terminal sends the PRACH according to a parameter configured by the PRACH coverage level, that is, the terminal indicates the capability of reporting the request for configuring the coverage mode C or reporting the capability of supporting the coverage mode C.
Step three: the terminal transmits or receives data according to the coverage mode C parameter configured by the system; or after receiving the coverage mode C configuration signaling, the terminal performs uplink transmission and downlink reception according to the coverage mode C parameters configured by the system. The uplink transmission according to the parameters of the coverage mode C at least comprises PRACH transmission according to the corresponding PRACH coverage grade of the coverage mode C, physical uplink control channel PUCCH transmission configured or scheduled according to the coverage mode C, and physical uplink shared channel PUSCH transmission according to the coverage mode C by reading the corresponding downlink control information format or random access response message to obtain scheduling information.
For the embodiment of the present invention, the overlay mode C configuration signaling may be a user-specific signaling or a contention resolution message (MSG 4); the Coverage mode C parameter configured by the system at least includes a configuration parameter related to a Coverage mode B of a Bandwidth limited/Coverage enhanced (BL/CE) terminal in a Release 14 version protocol, and the related configuration parameter may include a narrowband indication, and/or a PRB indication, and/or a resource unit number indication, and the like. The terminal transmits data according to the coverage mode C, wherein the data comprises at least one of the following contents, namely sending of a PUSCH channel; sending HARQ-ACK; and receiving the MPDCCH.
The transmission content of the PUSCH comprises service data and/or a random access response; the receiving of the MPDCCH at least comprises the receiving of downlink control information with a corresponding format, namely the format of the downlink control information is 6-0C/6-1C.
A flow example of downlink reception and uplink transmission performed by a plurality of users supporting the coverage mode C according to the coverage mode C is given below.
An example of the terminal behavior flow is given in fig. 4. In the present embodiment, the overlay mode B is replaced with the overlay mode a to form a new instance.
In this example, the terminal reports the overlay mode C request (or capability) in a manner of combining implicit and explicit indications. Firstly, a terminal acquires whether a cell supports a configuration coverage mode C or not by reading a system message; if the cell supports the configuration of the coverage mode C, the terminal selects the PRACH coverage grade corresponding to the coverage mode B/the coverage mode C according to the downlink measurement, sends the PRACH according to the configuration parameters of the coverage grade, and receives the random access response message according to the coverage mode B. Wherein, the PRACH coverage level corresponding to coverage mode B/coverage mode C is fixed by the system, and one or more of the PRACH coverage levels corresponding to coverage mode B in the Release 14 version protocol may be defined to simultaneously support coverage mode C, for example, among PRACH coverage levels 2 and 3 corresponding to coverage mode B, level 3 is defined to simultaneously support coverage mode B and coverage mode C; next, the terminal reports the base station in the connection establishment request message, whether the terminal supports or uses the coverage mode C, and when the report supports or uses the coverage mode C message and succeeds (the terminal receives ACK feedback of the connection establishment request message), the terminal can perform uplink transmission and downlink reception according to the coverage mode C; otherwise, the terminal performs uplink transmission and downlink reception according to the coverage mode B.
For the embodiment of the present invention, it is required in this example that the uplink resource scheduling result of the coverage mode C can cover all uplink resource scheduling results of the coverage mode B in the prior art, and can be designed using the downlink control information in table 9. At this time, when the terminal needs to select the coverage mode B or the coverage mode C according to the downlink measurement result, and both the cell and the terminal support the coverage mode C, the terminal is configured to be the coverage mode C; and when one party does not support the configuration of the coverage mode C, the terminal configures the coverage mode B.
Another example of the terminal behavior flow is given in fig. 6.
For the embodiment of the present invention, in this example, the terminal reports the capability (or request) of the coverage mode C in an implicit manner according to a certain rule, and the system needs to define a PRACH coverage level dedicated to support the coverage mode C.
Firstly, a terminal reads system information to acquire a PRACH coverage level configuration parameter corresponding to a coverage mode C; then, when the downlink measurement result of the terminal meets the requirement of the coverage level RSRP threshold of the PRACH corresponding to the coverage mode C, the terminal configures and sends the PRACH according to the coverage level of the PRACH corresponding to the coverage mode C; the base station can confirm the coverage mode of the terminal according to the PRACH coverage grade selected by the terminal; at this time, the terminal may perform subsequent downlink receiving and uplink sending processes according to the coverage mode C, and if the system defines that the random access response message (including the format and the scheduled time-frequency resource) is received in the coverage mode C, the terminal may perform uplink and downlink physical processes according to the coverage mode C from the random access response message.
An example of a third described terminal behavior flow is given in fig. 7.
For the embodiment of the present invention, in this example, the terminal reports the request (or capability) of the overlay mode C in an explicit signaling manner.
Firstly, a terminal acquires whether a cell supports a configuration coverage mode C or not by reading a system message; the terminal may then report the overlay mode C request (or capability) in a connection setup request message (MSG 3); or, the connected terminal reports the request (or capability) of the coverage mode C through a terminal capability reporting process; at this time, the terminal may perform downlink reception and uplink transmission according to the coverage mode C, or perform an uplink and downlink physical process according to the coverage mode C after the terminal needs to receive a user-specific signaling used by the base station to indicate the coverage mode C.
For the purpose of this application, the following describes a method for designing a channel interleaver for uplink subcarrier level scheduling. The channel interleaver is used for inputting the coded bit sequence into the channel interleaver, and ensures that the interleaved bit sequence is finally mapped on the resource particles after the processes of scrambling, modulating, layer mapping, transformational precoding (precoding), precoding and the like, so that the mapping of time domain and frequency domain on the transmission waveform can be realized. For uplink subcarrier-level scheduling, the time domain length for uplink transmission of a single transport block spans multiple subframes. When the existing channel interleaver is designed for transmission of uplink subcarrier level scheduling, data bits transmitted in the same subframe are not continuous bits in a coded bit sequence, so that a base station is required to start decoding only after receiving all subframes occupied by a transmission block, which is not beneficial to reducing reception delay and can influence the realization of the existing eMTC base station receiver.
A channel interleaver for uplink subcarrier-level scheduled transmissions includes interleaving matrix partitioning. Preferably, when the interleaved coded bit sequence is output after the interleaving matrix is divided, the interleaved coded bit sequence is sequentially output according to the index order of the divided interleaving matrix. In one embodiment, the number of the channel interleaving matrix columns is denoted as CmuxIs valued asWhereinThe number of single carrier frequency division multiple access symbols used for transmitting PUSCH in a subframe or the number of single carrier frequency division multiple access symbols used for PUSCH transmission in an uplink pilot frequency time slot configured by a high-level signaling. According to the existing protocol (TS36.212, Release 14) design, a channel interleaving matrix is generated, and the number of rows and columns is respectively marked as RmuxAnd CmuxThe channel interleaving matrix is denoted as
Wherein, the sequencey 0,y 1,…,The bit sequence after channel coding at least comprises one of data transmission block bits, channel state information bits, rank information bits and hybrid automatic repeat request response message bits. Further, the dimension is (R)mux×Cmux) The channel interleaving matrix is divided into a plurality of dimensions ofOf the channel interleaving matrix, whereinAnd isThe number of the transmission subcarriers indicated in the downlink control information, where the number of the transmission subcarriers may be the same as or different from the number of the subcarriers allocated in the downlink control information, is shown in table 3/table 4. The above dimension is (R)mux×Cmux) Each in the channel interleaving matrix ofThe rows are organized into a dimension ofThe ith dimension isThe channel interleaving matrix is:
wherein i is 0, …, Nm-1 andthe output of the channel interleaver is, in terms of dimensionThe index sequence of the channel interleaving matrix is sequentially output from small to large, and each dimension isAn interleaving sequence of the channel interleaving matrix; each dimension isThe channel interleaving matrix outputs the interleaving sequence in a way that the elements in the interleaving matrix are read in sequence according to columns. N is a radical ofmDimension ofThe interleaving sequence output by the channel interleaving matrix is cascaded to form an interleaving bit sequence output by the complete channel interleaver. The output bit sequence is designed according to the channel interleaver, after the resource particle mapping is completed, the data information carried in the same subframe can be ensured to be a continuous section in the channel coding bit sequence, so that the base station can start decoding after receiving partial subframes of a transmission block.
An embodiment of the present invention provides a terminal, as shown in fig. 8, where the terminal includes: a judging module 71, a first sending module 72, a first receiving module 73, and a data transmitting module 74, wherein,
the determining module 71 is configured to determine whether the base station supports the first scheduling mode according to the configuration information of the first scheduling mode sent by the base station.
A first sending module 72, configured to send a request message and/or a capability message to the base station when the base station supports the first scheduling mode. The request message is used for requesting the base station to configure a first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal.
A first receiving module 73, configured to receive scheduling information for the first scheduling mode sent by the base station.
And a data transmission module 74, configured to transmit or receive data according to the scheduling information of the first scheduling mode received by the first receiving module 73.
The terminal provided by the embodiments of the present invention determines whether a base station supports a first scheduling mode according to configuration information of the first scheduling mode sent by the base station, and if the base station supports the first scheduling mode, the terminal sends a request message and/or a capability message to the base station to request the base station to configure the first scheduling mode for the terminal, or is used to report the scheduling mode supported by the terminal. That is, in the embodiment of the present invention, compared with the prior art, a new scheduling mode, that is, a first scheduling mode appears in the embodiment of the present invention, and when both the terminal and the base station support the first scheduling mode, the base station may send scheduling information of the first scheduling mode to the terminal, so that the terminal and the base station can send or receive data in the new scheduling mode.
An embodiment of the present invention provides a base station, as shown in fig. 9, including: a broadcasting module 81, a second receiving module 82, a second transmitting module 83, wherein,
a broadcasting module 81, configured to broadcast a configuration message of the first scheduling mode when the base station supports the first scheduling mode.
And a second receiving module 82, configured to receive the request message and/or the capability message sent by the terminal. The request message is used for requesting the base station to configure the first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal.
And a second sending module 83, configured to send, to the terminal, the scheduling information of the first scheduling mode when the terminal scheduling mode is the first scheduling mode, so that the terminal performs data sending or receiving according to the scheduling information of the first scheduling mode.
The embodiment of the invention provides a base station, and compared with the prior art, a terminal in the embodiment of the invention judges whether the base station supports a first scheduling mode according to configuration information of the first scheduling mode sent by the base station, if the base station supports the first scheduling mode, the terminal sends a request message and/or a capability message to the base station to request the base station to configure the first scheduling mode for the terminal, or is used for reporting the scheduling mode supported by the terminal, when the base station receives the request message and/or the capability message sent by the terminal and determines that the terminal scheduling mode is the first scheduling mode, the terminal sends the scheduling information of the first scheduling mode to the terminal, and the terminal sends or receives data according to the scheduling information of the first scheduling mode. That is, in the embodiment of the present invention, compared with the prior art, a new scheduling mode, that is, a first scheduling mode appears in the embodiment of the present invention, and when both the terminal and the base station support the first scheduling mode, the base station may send scheduling information of the first scheduling mode to the terminal, so that the terminal and the base station can send or receive data in the new scheduling mode.
The terminal and the base station provided in the embodiments of the present invention may implement the above-mentioned method embodiments, and for the specific function implementation, reference is made to the description in the method embodiments, which is not repeated herein.
Those skilled in the art will appreciate that the present invention includes apparatus directed to performing one or more of the operations described in the present application. These devices may be specially designed and manufactured for the required purposes, or they may comprise known devices in general-purpose computers. These devices have stored therein computer programs that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., computer) readable medium, including, but not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magnetic-optical disks, ROMs (Read-Only memories), RAMs (Random Access memories), EPROMs (Erasable programmable Read-Only memories), EEPROMs (Electrically Erasable programmable Read-Only memories), flash memories, magnetic cards, or optical cards, or any type of media suitable for storing electronic instructions, and each coupled to a bus. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).
It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions may be implemented by a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the features specified in the block or blocks of the block diagrams and/or flowchart illustrations of the present disclosure.
Those of skill in the art will appreciate that various operations, methods, steps in the processes, acts, or solutions discussed in the present application may be alternated, modified, combined, or deleted. Further, various operations, methods, steps in the flows, which have been discussed in the present application, may be interchanged, modified, rearranged, decomposed, combined, or eliminated. Further, steps, measures, schemes in the various operations, methods, procedures disclosed in the prior art and the present invention can also be alternated, changed, rearranged, decomposed, combined, or deleted.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (15)

1. A method for information transmission is applied to a terminal and comprises the following steps:
judging whether the base station supports the first scheduling mode or not according to configuration information of the first scheduling mode sent by the base station;
if the base station supports a first scheduling mode, a terminal sends a request message and/or a capability message to the base station, wherein the request message is used for requesting the base station to configure the first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal;
and receiving scheduling information which is sent by the base station and used for a first scheduling mode, and sending or receiving data according to the scheduling information of the first scheduling mode.
2. The method according to claim 1, wherein the step of receiving the scheduling information of the first scheduling mode transmitted by the base station further comprises any one of the following steps:
receiving a confirmation message sent by the base station, wherein the confirmation message is used for informing the terminal, and then scheduling by adopting a first scheduling mode;
and receiving the configuration information of the scheduling mode sent by the base station, and determining the subsequent scheduling mode adopted by the base station according to the configuration information of the scheduling mode.
3. The method according to any of claims 1-2, wherein the step of receiving the scheduling information of the first scheduling mode transmitted by the base station and performing data transmission or reception according to the scheduling information of the first scheduling mode comprises:
monitoring downlink control information of a first scheduling mode sent by the base station, wherein the downlink control information comprises downlink control information of a first format and downlink control information of a second format, the downlink control information of the first format is used for bearing uplink authorization information, and the downlink control information of the second format is used for bearing downlink authorization information;
and performing uplink transmission according to the downlink control information of the first format, and/or performing downlink reception according to the downlink control information of the second format.
4. The method according to any of claims 1-3, wherein the configuration information of the first scheduling mode comprises:
an indication message that the base station supports a first scheduling mode; and/or a Physical Random Access Channel (PRACH) coverage level configuration message corresponding to the first scheduling mode;
wherein the PRACH coverage level configuration message corresponding to the first scheduling mode includes at least one of the following:
the PRACH transmission repetition times; a leader sequence index; PRACH frequency modulation offset; searching spatial offset of a physical downlink control channel (MPDCCH) of machine type communication; and the Reference Signal Received Power (RSRP) threshold corresponding to the PRACH coverage level.
5. The method of claim 4, wherein the step of sending a configuration request message and/or a capability message to the base station comprises:
determining the PRACH coverage level;
if the scheduling mode corresponding to the PRACH coverage level is the first scheduling mode, carrying the configuration request message and/or the capability message in a random access request message sent to the base station;
and if the scheduling modes corresponding to the PRACH coverage grade comprise at least two scheduling modes, carrying the configuration request message and/or the capability message in a connection establishment request message sent to the base station, wherein the at least two scheduling modes comprise the first scheduling mode.
6. The method according to claim 4, wherein the step of sending a configuration request message and/or a capability message to the base station comprises any one of:
sending a connection establishment request message to the base station, wherein the connection establishment request message carries the configuration request message and/or the capability message;
and if the connection between the terminal and the base station is established, sending the configuration request message and/or the capability message to the base station.
7. The method according to any one of claims 3-6, wherein the step of performing uplink transmission according to the downlink control information in the first format comprises:
acquiring a resource allocation message from downlink control information in a first format, and performing uplink transmission according to the resource allocation message;
the resource allocation message comprises at least one of the following:
narrowband indication information; physical resource block PRB indication information; subcarrier indication information; the number of resource units indicates information.
8. The method of claim 7, further comprising:
if the resource allocation message acquired from the downlink control information in the first format contains a subcarrier indication message and does not contain the PRB indication message, determining a subcarrier and a PRB corresponding to current uplink transmission according to the subcarrier indication message; and/or the presence of a gas in the gas,
if the resource allocation message obtained from the downlink control information in the first format contains a subcarrier indication message and does not contain the resource unit number indication information, determining the subcarrier and the resource unit number corresponding to the current uplink transmission according to the subcarrier indication message.
9. The method according to any one of claims 7-8, further comprising:
and determining at least one of narrowband information, PRB information, subcarrier information and resource unit number used by uplink transmission according to system preset information and/or received Radio Resource Control (RRC) signaling indication information.
10. The method according to any of claims 7-9, wherein the step of performing uplink transmission according to the resource allocation message comprises:
determining the size of a transmission block according to the subcarrier information and the number of resource units acquired from the resource allocation message; and performing uplink transmission based on the size of the transmission block.
11. The method according to any one of claims 7-10, further comprising:
acquiring hybrid automatic repeat request acknowledgement HARQ-ACK resource information from downlink control information in a second format, and performing acknowledgement character ACK uplink transmission according to the HARQ-ACK resource information; or,
acquiring hybrid automatic repeat request acknowledgement (HARQ-ACK) resource information from downlink control information in a second format, and carrying out Negative Acknowledgement (NACK) uplink transmission according to the HARQ-ACK resource information;
wherein the HARQ-ACK resource information comprises at least one of: HARQ-ACK resource offset information; HARQ-ACK transmission repetition number indication information; HARQ-ACK scheduling delay indication information; sub-carrier indication information for HARQ-ACK transmission.
12. The method of any of claims 1-11, wherein the scheduling mode comprises an overlay mode.
13. A method for information transmission, applied to a base station, includes:
broadcasting a configuration message of a first scheduling mode when the base station supports the first scheduling mode;
receiving a request message and/or a capability message sent by a terminal, wherein the request message is used for requesting the base station to configure the first scheduling mode for the terminal, and the capability message is used for reporting the scheduling mode supported by the terminal;
and if the terminal scheduling mode is the first scheduling mode, transmitting scheduling information of the first scheduling mode to the terminal so that the terminal transmits or receives data according to the scheduling information of the first scheduling mode.
14. A terminal, comprising:
the judging module is used for judging whether the base station supports the first scheduling mode or not according to configuration information of the first scheduling mode sent by the base station;
a first sending module, configured to send a request message and/or a capability message to the base station when the base station supports a first scheduling mode, where the request message is used to request the base station to configure the first scheduling mode for the terminal, and the capability message is used to report the scheduling mode supported by the terminal;
a first receiving module, configured to receive scheduling information for a first scheduling mode sent by the base station;
and the data transmission module is used for transmitting or receiving data according to the scheduling information of the first scheduling mode received by the first receiving module.
15. A base station, comprising:
a broadcasting module, configured to broadcast a configuration message of a first scheduling mode when the base station supports the first scheduling mode;
a second receiving module, configured to receive a request message and/or a capability message sent by a terminal, where the request message is used to request the base station to configure the first scheduling mode for the terminal, and the capability message is used to report a scheduling mode supported by the terminal;
and the second sending module is used for sending the scheduling information of the first scheduling mode to the terminal when the terminal scheduling mode is the first scheduling mode, so that the terminal sends or receives data according to the scheduling information of the first scheduling mode.
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PCT/KR2018/008766 WO2019027262A1 (en) 2017-08-02 2018-08-01 Method, equipment for receiving scheduling information, terminal, base station and method for transmitting information.
US16/635,983 US11317431B2 (en) 2017-08-02 2018-08-01 Method, equipment for receiving scheduling information, terminal, base station and method for transmitting information
EP18841342.1A EP3646656A4 (en) 2017-08-02 2018-08-01 Method, equipment for receiving scheduling information, terminal, base station and method for transmitting information.
US17/660,367 US11963192B2 (en) 2017-08-02 2022-04-22 Method, equipment for receiving scheduling information, terminal, base station and method for transmitting information
US18/636,019 US20240284469A1 (en) 2017-08-02 2024-04-15 Method, equipment for receiving scheduling information, terminal, base station and method for transmitting information

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