CN118540801A - Indication and acquisition method of scheduling resources, base station, terminal and readable medium - Google Patents
Indication and acquisition method of scheduling resources, base station, terminal and readable medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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Abstract
An indication and acquisition method, a base station, a terminal and a readable medium for scheduling resources, wherein the indication method for scheduling resources comprises the following steps: receiving a preamble sent by a user terminal; determining scheduling resource information of a plurality of time slots; and indicating the scheduling resource information of the plurality of time slots to the user terminal through a random access response. By applying the scheme, the user terminal can send the MSG3 based on a plurality of time slots, so that the success rate of sending the MSG3 by the user terminal is improved.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a method for indicating and acquiring scheduling resources, a base station, a terminal and a readable medium.
Background
In a wireless communication system, when a User Equipment (UE) needs to access a network, it is necessary to initiate random access to acquire uplink synchronization. The UE in a connected state also needs to initiate random access in some scenarios. For example, when uplink is out of sync, if uplink data needs to be transmitted, the UE needs to transmit a competitive random access (Contention based Random Access Procedure); when uplink is out of step, if the base station needs to send data to the UE, the UE can be triggered to execute competitive random access or non-competitive random access through physical downlink control signaling.
In the existing New Radio (NR) protocol, a base station configures a random access resource through a system message, for example, a time-frequency resource location where the random access is located, an available preamble of the random access, etc., where the random access resource generally occurs periodically. When the UE has the requirement of accessing the network, random access is initiated according to the random access resource configured by the base station. The competitive random access process comprises the following steps: 1. the UE randomly selects a Preamble (Preamble) and sends the Preamble (Preamble) to the base station through a message 1 (MSG 1); 2. the base station transmits a random access response to the UE through message 2 (MSG 2); 3. the UE sends a message 3 (MSG 3) according to the uplink resource contained in the random access response, and when the UE initially accesses the network, the MSG3 contains a radio resource control (Radio Resource Control, RRC) connection request; when the UE performs handover, MSG3 includes handover completion sent to the target base station; 4. the base station transmits a contention resolution indicating that the UE random access was successful. The non-competitive random access is used for the connected UE, and the Preamble is distributed to the UE in advance by the base station through signaling. The random access executed by the UE through the allocated Preamble can not generate conflict, the base station sends a random access response after receiving the Preamble sent by the UE, and the random access process is ended.
In practical applications, NR networks are typically deployed in licensed (licensed) spectrum owned by the operator, but since spectrum resources are very scarce, the operator will fully utilize the bandwidth of unlicensed (unlicensed) spectrum in the early stages of network establishment. For example, before using the 5GHz spectrum, the base station may listen to a frequency band shared by the WLAN channel and NR signals possibly deployed by other operators through a listen before talk (Listen Before Talk, LBT) mechanism, and if the frequency band is detected to be free, may use the frequency band as a transmission channel for signaling and data transmission. After a period of use, e.g. 8ms, the spectrum resources need to be released and then re-listening to obtain the right to use the next spectrum.
When the NR network is deployed in unlicensed spectrum, in the process of performing random access by the UE, it is necessary to perform uplink transmission depending on the result of LBT. According to the existing implementation scheme, the base station indicates the transmission resource of MSG3 in the random access response (Random Access Response, RAR), but the UE may not be able to transmit MSG3 in time due to the LBT being unable to obtain the usage right of the channel, and must re-initiate the Preamble, thereby causing an increase in probability of random access failure.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is how to improve the success rate of the MSG3 transmission of the user terminal.
In order to solve the above technical problems, an embodiment of the present invention provides a method for indicating scheduling resources, where the method includes: receiving a preamble sent by a user terminal; determining scheduling resource information of a plurality of time slots; and indicating the scheduling resource information of the plurality of time slots to the user terminal through a random access response.
Optionally, the indicating the scheduling resource information of the plurality of time slots to the user terminal through the random access response includes: performing LBT to obtain the use right of the idle channel; and indicating scheduling resource information of the plurality of time slots to the user terminal through a random access response based on the idle channel.
Optionally, the plurality of time slots are consecutive or discontinuous.
Optionally, when the plurality of time slots are consecutive time slots, before the indicating the scheduling resource information of the time slots to the user terminal through the random access response, the method further includes: the number information of the consecutive plurality of time slots is indicated by a system message.
Optionally, when the plurality of time slots are discontinuous, before the indicating the scheduling resource information of the plurality of time slots to the user terminal through the random access response, the method further includes: information about the discontinuous plurality of time slots is indicated by a system message.
Optionally, the information related to the discontinuous plurality of time slots includes: the number information of the discontinuous plurality of time slots and the number information of time slots of intervals among the discontinuous plurality of time slots.
Optionally, the scheduling resource information corresponding to each time slot is the same or different.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: and N groups of scheduling resource parameter information, wherein N is the number of the plurality of time slots.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: the method comprises the steps of carrying out scheduling on the same scheduling resource parameter information corresponding to a plurality of time slots and different scheduling resource parameter information corresponding to N groups of time slots, wherein N is the number of the time slots.
Optionally, the scheduling resource parameter includes: a modulation-demodulation policy parameter, an allocated physical resource block parameter, a power control parameter of MSG3 transmission, a duration of performing LBT.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: time slot information of a plurality of time slots and transmission resource information allocated corresponding to each time slot.
The embodiment of the invention provides a method for acquiring scheduling resources, which comprises the following steps: receiving a random access response, wherein the random access response comprises scheduling resource information of a plurality of time slots; and acquiring scheduling resource information of the plurality of time slots through the random access response.
Optionally, the plurality of time slots are consecutive or discontinuous.
Optionally, when the plurality of time slots are consecutive plurality of time slots, before the receiving the random access response, the method further includes: receiving a system message; and acquiring the number information of the continuous multiple time slots through the system message.
Optionally, when the plurality of time slots are discontinuous, before the receiving the random access response, the method further includes: receiving a system message; and acquiring the related information of the discontinuous multiple time slots through the system message.
Optionally, the information related to the discontinuous plurality of time slots includes: the number information of the discontinuous plurality of time slots and the number information of time slots of intervals among the discontinuous plurality of time slots.
Optionally, the scheduling resource information corresponding to each time slot is the same or different.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: and N groups of scheduling resource parameter information, wherein N is the number of the plurality of time slots.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: the method comprises the steps of carrying out scheduling on the same scheduling resource parameter information corresponding to a plurality of time slots and different scheduling resource parameter information corresponding to N groups of time slots, wherein N is the number of the time slots.
Optionally, the scheduling resource parameter includes: a modulation-demodulation policy parameter, an allocated physical resource block parameter, a power control parameter of MSG3 transmission, a duration of performing LBT.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: time slot information of a plurality of time slots and transmission resource information allocated corresponding to each time slot.
Optionally, the acquiring the scheduling resource information of the plurality of time slots through the random access response further includes: and when the MSG3 is allowed to be transmitted, transmitting the MSG3 at least once according to the scheduling resource information of the plurality of time slots.
An embodiment of the present invention provides a base station, including: a first receiving unit adapted to receive a preamble transmitted by a user terminal; a determining unit adapted to determine scheduling resource information of a plurality of time slots; a first indication unit adapted to indicate scheduling resource information of the plurality of time slots to the user terminal through a random access response.
Optionally, the first indication unit includes: an execution subunit adapted to execute LBT to obtain the usage rights of the idle channels; an indication subunit adapted to indicate the scheduling resource information of the plurality of time slots to the user terminal through a random access response based on the idle channel.
Optionally, the plurality of time slots are consecutive or discontinuous.
Optionally, when the plurality of time slots are consecutive plurality of time slots, the method further includes: and a second indicating unit adapted to indicate the number information of the consecutive plurality of time slots by a system message.
Optionally, when the plurality of time slots are discontinuous plurality of time slots, the method further includes: and a third indicating unit adapted to indicate the related information of the discontinuous plurality of time slots through a system message.
Optionally, the information related to the discontinuous plurality of time slots includes: the number information of the discontinuous plurality of time slots and the number information of time slots of intervals among the discontinuous plurality of time slots.
Optionally, the scheduling resource information corresponding to each time slot is the same or different.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: and N groups of scheduling resource parameter information, wherein N is the number of the plurality of time slots.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: the method comprises the steps of carrying out scheduling on the same scheduling resource parameter information corresponding to a plurality of time slots and different scheduling resource parameter information corresponding to N groups of time slots, wherein N is the number of the time slots.
Optionally, the scheduling resource parameter includes: a modulation-demodulation policy parameter, an allocated physical resource block parameter, a power control parameter of MSG3 transmission, a duration of performing LBT.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: time slot information of a plurality of time slots and transmission resource information allocated corresponding to each time slot.
An embodiment of the present invention provides a terminal, including: a second receiving unit adapted to receive a random access response, the random access response comprising scheduling resource information of a plurality of time slots; and the first acquisition unit is suitable for acquiring the scheduling resource information of the time slots through the random access response.
Optionally, the plurality of time slots are consecutive or discontinuous.
Optionally, the terminal further includes: a third receiving unit adapted to receive the system message; and the second acquisition unit is suitable for acquiring the number information of the continuous multiple time slots through the system message.
Optionally, the terminal further includes: a third receiving unit adapted to receive the system message; and a third acquisition unit adapted to acquire the related information of the discontinuous multiple time slots through the system message.
Optionally, the information related to the discontinuous plurality of time slots includes: the number information of the discontinuous plurality of time slots and the number information of time slots of intervals among the discontinuous plurality of time slots.
Optionally, the scheduling resource information corresponding to each time slot is the same or different.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: and N groups of scheduling resource parameter information, wherein N is the number of the plurality of time slots.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: the method comprises the steps of carrying out scheduling on the same scheduling resource parameter information corresponding to a plurality of time slots and different scheduling resource parameter information corresponding to N groups of time slots, wherein N is the number of the time slots.
Optionally, the scheduling resource parameter includes: a modulation-demodulation policy parameter, an allocated physical resource block parameter, a power control parameter of MSG3 transmission, a duration of performing LBT.
Optionally, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: time slot information of a plurality of time slots and transmission resource information allocated corresponding to each time slot.
Optionally, the terminal further includes: and the sending unit is suitable for sending the MSG3 at least once according to the scheduling resource information of the time slots when the MSG3 is allowed to be sent.
The embodiment of the invention provides a computer readable storage medium, which is a nonvolatile storage medium or a non-transient storage medium, and is stored with computer instructions, and the computer instructions execute the steps of any one of the above indication methods of scheduling resources or any one of the above acquisition methods of scheduling resources when running.
The embodiment of the invention provides a base station, which comprises a memory and a processor, wherein the memory stores computer instructions capable of running on the processor, and the processor executes the steps of any one of the scheduling resource indication methods when running the computer instructions.
The embodiment of the invention provides a terminal, which comprises a memory and a processor, wherein the memory stores computer instructions capable of running on the processor, and the processor executes the steps of any one of the scheduling resource acquisition methods when running the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
After receiving the preamble sent by the user terminal, the embodiment of the invention indicates the scheduling resource information of a plurality of time slots to the user terminal through the random access response, so that the user terminal can send the MSG3 based on the plurality of time slots, thereby improving the success rate of sending the MSG3 by the user terminal.
Further, the scheduling resource information of the plurality of slots includes: the same scheduling resource parameter information corresponding to the plurality of time slots and different scheduling resource parameter information corresponding to the N groups of the plurality of time slots only indicate once for the same scheduling resource parameter of the plurality of time slots, so that bit overhead can be effectively saved.
Drawings
FIG. 1 is a flowchart of a method for indicating scheduling resources according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for obtaining scheduling resources according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In the existing implementation, when the NR network is deployed in unlicensed spectrum, in the process of performing random access by the UE, the uplink transmission needs to be performed depending on the result of LBT. According to the existing implementation scheme, the base station indicates the transmission resource of the MSG3 in the RAR, but the UE may not be able to send the MSG3 in time due to the LBT being unable to obtain the usage right of the channel, and must reinitiate the Preamble, thereby increasing the probability of random access failure.
After receiving the preamble sent by the user terminal, the embodiment of the invention indicates the scheduling resource information of a plurality of time slots to the user terminal through the random access response, so that the user terminal can send the MSG3 based on the plurality of time slots, thereby improving the success rate of sending the MSG3 by the user terminal.
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, an embodiment of the present invention provides a method for indicating scheduling resources, which may include the following steps:
Step S101, a preamble sent by a user terminal is received.
In implementations, the base station may be deployed in unlicensed spectrum (which may also be referred to as a frequency band) to transmit system messages, paging messages, and the like. When the base station is deployed in unlicensed spectrum, the base station indicates the scheduling resource, that is, the transmission resource of MSG3 in the RAR, but the UE may not be able to transmit MSG3 in time due to the LBT being unable to obtain the usage right of the channel, and must reinitiate the preamble, so that the probability of the random access failure increases, so that the indication scheme for optimizing the scheduling resource needs to be considered.
In a specific implementation, when the base station is deployed in unlicensed spectrum, the user terminal executes LBT, and after obtaining the usage right of the idle channel, selects a preamble based on the random access resource to initiate random access, so the base station needs to receive the preamble sent by the user terminal first.
Step S102, determining scheduling resource information of a plurality of time slots.
In a specific implementation, in order to improve the success rate of the MSG3 transmission by the ue, the ue may be indicated with scheduling resource information of multiple timeslots for transmitting the MSG3.
In a specific implementation, the plurality of time slots may be a plurality of continuous time slots or a plurality of discontinuous time slots.
In a specific implementation, the scheduling resource information of the plurality of time slots may be the same or different for each time slot.
Step S103, the scheduling resource information of the time slots is indicated to the user terminal through a random access response.
In a specific implementation, the random access response may be sent over a medium access control (MediumAccess Control, MAC) layer protocol data unit (Protocol Data Unit, PDU) containing the random access response.
In a specific implementation, when the base station can be deployed in unlicensed spectrum, the base station needs to perform LBT to acquire the usage right of the channel, that is, when the acknowledgement channel is idle, the random access response can be sent by using the idle channel.
In an embodiment of the present invention, the indicating, to the ue, scheduling resource information of the plurality of slots includes: performing LBT to obtain the use right of the idle channel; and indicating scheduling resource information of the plurality of time slots to the user terminal based on the idle channel.
In a specific implementation, when the plurality of time slots are a plurality of continuous time slots, the number of the plurality of time slots can be agreed to be a fixed value in a pre-agreed manner, for example, for random access on unlicensed frequency bands, scheduling resource information indicated by a random access response is applied to the plurality of continuous time slots, and the plurality of time slots are 3 continuous time slots; the number information of the plurality of slots may also be indicated by a system message. Since only the scheduling resource information of one time slot is indicated in the existing random access response, when the random access response indicates the scheduling resource information of a plurality of time slots, the number information of the plurality of time slots needs to be indicated, so that the UE knows that the resource information contained in the current random access response message can be applied to the plurality of time slots.
In an embodiment of the present invention, when the plurality of time slots are consecutive time slots, a predetermined manner is adopted to fix the number of the time slots, and the scheduling resource information corresponding to each time slot is the same, the format of the MAC PDU currently including the random access response does not need to be modified, and no additional indication bit needs to be added.
In an embodiment of the present invention, when the plurality of time slots are consecutive plurality of time slots, before the scheduling resource information of the plurality of time slots is indicated to the user terminal through a random access response, the number information of the consecutive plurality of time slots may also be indicated through a system message.
In a specific implementation, the number information of the continuous multiple time slots corresponding to the random access response can be added in the random access configuration information in the system message.
In a specific implementation, when the plurality of time slots are discontinuous time slots, the information related to the plurality of time slots, for example, the number of the discontinuous time slots and the interval between two adjacent discontinuous time slots, may be agreed to be a fixed value in a pre-agreed manner, or may be indicated by a system message.
In an embodiment of the present invention, when the plurality of time slots are discontinuous time slots, the information about the time slots may be agreed to be a fixed value. For example, the discontinuous plurality of slots is fixed to 2 slots, and the discontinuous plurality of slots is fixed to 2 slots, then when the first scheduling resource is applied to slot n, the second scheduling resource is applied to slot n+3.
In an embodiment of the present invention, when the plurality of time slots are discontinuous plurality of time slots, before the scheduling resource information of the plurality of time slots is indicated to the user terminal through a random access response, the relevant information of the discontinuous plurality of time slots may also be indicated through a system message.
In a specific implementation, information related to the discontinuous multiple time slots corresponding to the random access response can be added in the random access configuration information in the system message.
In an implementation, the information related to the discontinuous plurality of time slots may include: the number information of the discontinuous plurality of time slots and the number information of time slots of intervals among the discontinuous plurality of time slots.
In a specific implementation, when the scheduling resource information corresponding to each time slot is different, a bit needs to be added to the existing MAC PDU including the random access response to indicate the scheduling resource information corresponding to a plurality of time slots.
In a specific implementation, for the random access response indicating the scheduling resource information corresponding to the plurality of time slots, the scheduling resource parameter information of each time slot may be indicated separately, or the scheduling resource parameter information of each time slot may be indicated jointly, for example, the same scheduling resource parameter is indicated only once for the plurality of time slots, and different scheduling resource parameters are indicated separately for the plurality of time slots, so as to save bit overhead.
In a specific implementation, the scheduling resource parameter may include: a modulation-demodulation policy parameter, an allocated physical resource block parameter, a power control parameter of MSG3 transmission, a duration of performing LBT.
For example, in an embodiment of the present invention, the modulation and demodulation policy parameters corresponding to the plurality of time slots are the same as the power control parameters of MSG3 transmission, the allocated physical resource block parameters corresponding to the plurality of time slots are different, and only one time of the modulation and demodulation policy parameters and the power control parameters of MSG3 transmission may be indicated in the random access response, and for the allocated physical resource block parameters, since the corresponding value of each time slot is different, it is necessary to indicate that the allocated physical resource block parameters corresponding to different time slots are used for MSG3 transmission in different time slots.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: and N groups of scheduling resource parameter information, wherein N is the number of the plurality of time slots.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: the method comprises the steps of carrying out scheduling on the same scheduling resource parameter information corresponding to a plurality of time slots and different scheduling resource parameter information corresponding to N groups of time slots, wherein N is the number of the time slots.
In a specific implementation, when the plurality of time slots are discontinuous and the scheduling resource information corresponding to each time slot is different, the allocated scheduling resource information may also be directly indicated by a random access response. For example, slot information directly indicating a plurality of slots and transmission resource information allocated corresponding to each slot, so that resources of MSG3 can be allocated more flexibly.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: time slot information of a plurality of time slots and transmission resource information allocated corresponding to each time slot.
In a specific implementation, after receiving the random access response sent by the base station, the ue may acquire the scheduling resource according to the information indicated by the random access response. For example, the scheduling resources are: 2 transmission resources separated by 2 slots from subframe n. The user terminal performs LBT at or slightly before subframe n and decides whether to transmit MSG3 according to the result of LBT. If the usage right of the idle channel cannot be acquired in the subframe n, MSG3 is not transmitted. LBT is performed slightly before subframe n+3 or subframe n+3, and if the usage right of the idle channel is acquired, MSG3 is transmitted to the base station according to the scheduling resource. After receiving MSG3, the base station decides whether to allow the user terminal to access according to the admission control mechanism, if so, sends MSG4 to the user terminal. After the user terminal receives the MSG4 belonging to the user terminal, the random access process is completed.
In a specific implementation, when the user terminal allows to transmit MSG3 according to the result of LBT, at least one time of MSG3 is transmitted according to the scheduling resources of the multiple time slots, for example, the user terminal performs LBT discovery that the channel is idle, and in the allocated scheduling resources, the user terminal can transmit MSG3 for 2 times or 3 times, so that the success rate of MSG3 transmission can be improved.
The base station indicates the scheduling resource information of a plurality of time slots, so that the success rate of the user terminal for transmitting the MSG3 can be obviously improved, the random access is ensured to be continuously executed, and the user terminal is prevented from reinitiating the preamble after the channel use right cannot be obtained. It will be appreciated that step S101 and step S102 are merely used to distinguish between different steps, and do not indicate the order of execution. In a specific implementation, the step S101 may be performed first, then the step S102 may be performed first, then the step S101 may be performed, and then the step S101 and the step S102 may be performed simultaneously.
After the preamble sent by the user terminal is received by the application of the scheme, the scheduling resource information of the plurality of time slots is indicated to the user terminal through the random access response, so that the user terminal can send the MSG3 based on the plurality of time slots, and the success rate of sending the MSG3 by the user terminal is improved.
In order to enable those skilled in the art to better understand and implement the present invention, an embodiment of the present invention further provides a method for obtaining a scheduling resource, as shown in fig. 2.
Referring to fig. 2, the method for acquiring the scheduling resource may include the following steps:
step S201, a random access response is received, where the random access response includes scheduling resource information of a plurality of slots.
In a specific implementation, when the base station is deployed in unlicensed spectrum, the user terminal first executes LBT, obtains the usage right of idle channel, selects a preamble based on random access resource to initiate random access, and waits to receive random access response sent by the base station.
In an implementation, the user terminal may receive the random access response through a MAC PDU containing the random access response.
In a specific implementation, in order to improve the success rate of the MSG3 transmission by the ue, the random access response may include scheduling resource information of a plurality of slots.
In a specific implementation, the plurality of time slots may be a plurality of continuous time slots or a plurality of discontinuous time slots.
In a specific implementation, the scheduling resource information of the plurality of time slots may be the same or different for each time slot.
Step S202, the scheduling resource information of the time slots is acquired through the random access response.
In a specific implementation, when the plurality of time slots are continuous time slots, the user terminal may acquire the number information of the time slots through a pre-agreed fixed value, or may acquire the number information of the time slots through a system message.
In an embodiment of the present invention, when the plurality of time slots are consecutive time slots, the number information of the time slots is obtained by a predetermined fixed value, and the scheduling resource information corresponding to each time slot is the same, the format of the MAC PDU currently including the random access response does not need to be modified, that is, no additional indication bits need to be added.
In an embodiment of the present invention, when the plurality of time slots are consecutive time slots, before the receiving the random access response, the method further includes: receiving a system message; and acquiring the number information of the continuous multiple time slots through the system message.
In a specific implementation, the ue may acquire the number information of the continuous multiple time slots corresponding to the random access response through a related cell in the random access configuration information in the system message.
In a specific implementation, when the plurality of time slots are discontinuous plurality of time slots, the user terminal may acquire related information of the plurality of time slots in a pre-agreed manner, for example, the discontinuous plurality of time slots are agreed to be fixed 2 time slots, and the discontinuous plurality of time slots are agreed to be 2 in number, and when the first scheduling resource is applied to time slot n, the second scheduling resource is applied to time slot n+3; the related information of the plurality of time slots can also be acquired through a system message.
In an embodiment of the present invention, when the plurality of time slots are discontinuous, before the receiving the random access response, the method further includes: receiving a system message; and acquiring the related information of the discontinuous multiple time slots through the system message.
In a specific implementation, the ue may acquire the related information of the discontinuous multiple timeslots corresponding to the random access response through the related information element in the random access configuration information in the system message.
In a specific implementation, when the scheduling resource information corresponding to each time slot is different, bits need to be added to the existing MAC PDU including the random access response, so that the base station can be used to indicate the scheduling resource information corresponding to a plurality of time slots.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: and N groups of scheduling resource parameter information, wherein N is the number of the plurality of time slots.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: the method comprises the steps of carrying out scheduling on the same scheduling resource parameter information corresponding to a plurality of time slots and different scheduling resource parameter information corresponding to N groups of time slots, wherein N is the number of the time slots.
In a specific implementation, the scheduling resource parameter may include: a modulation-demodulation policy parameter, an allocated physical resource block parameter, a power control parameter of MSG3 transmission, a duration of performing LBT.
In a specific implementation, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: time slot information of a plurality of time slots and transmission resource information allocated corresponding to each time slot.
In a specific implementation, after receiving the random access response sent by the base station, the user terminal may acquire the scheduling resources of the plurality of time slots through the random access response. For example, the scheduling resources are: 2 transmission resources separated by 2 slots from subframe n. The user terminal performs LBT at or slightly before subframe n and decides whether to transmit MSG3 according to the result of LBT. If the usage right of the idle channel cannot be acquired in the subframe n, MSG3 is not transmitted. LBT is performed slightly before subframe n+3 or subframe n+3, and if the usage right of the idle channel is acquired, MSG3 is transmitted to the base station according to the scheduling resource. After receiving MSG3, the base station decides whether to allow the user terminal to access according to the admission control mechanism, if so, sends MSG4 to the user terminal. After the user terminal receives the MSG4 belonging to the user terminal, the random access process is completed.
In a specific implementation, when the user terminal allows to transmit MSG3 according to the result of LBT, at least one time of MSG3 is transmitted according to the scheduling resources of the multiple time slots, for example, the user terminal performs LBT discovery that the channel is idle, and in the allocated scheduling resources, the user terminal can transmit MSG3 for 2 times or 3 times, so that the success rate of MSG3 transmission can be improved.
In an embodiment of the present invention, after the obtaining the scheduling resource information of the plurality of time slots through the random access response further includes: and when the MSG3 is allowed to be transmitted, transmitting the MSG3 at least once according to the scheduling resource information of the plurality of time slots.
The base station indicates the scheduling resource information of a plurality of time slots, so that the success rate of the user terminal for transmitting the MSG3 can be obviously improved, the random access is ensured to be continuously executed, and the user terminal is prevented from reinitiating the preamble after the channel use right cannot be obtained.
In order to enable those skilled in the art to better understand and implement the present invention, an embodiment of the present invention further provides a base station capable of implementing the above-mentioned indication method of scheduling resources, as shown in fig. 3.
Referring to fig. 3, the base station 30 may include: a first receiving unit 31, a determining unit 32 and a first indicating unit 33, wherein:
the first receiving unit 31 is adapted to receive a preamble transmitted by a user terminal.
The determining unit 32 is adapted to determine scheduling resource information for a plurality of time slots.
The first indication unit 33 is adapted to indicate scheduling resource information of the plurality of time slots to the user terminal by means of a random access response.
In an embodiment of the present invention, the first indication unit includes 33: an execution subunit 331 and an instruction subunit 332, wherein:
the execution subunit 331 is adapted to execute LBT to obtain the usage rights of the idle channels.
The indicating subunit 332 is adapted to indicate the scheduling resource information of the plurality of time slots to the user terminal by means of a random access response based on the idle channel.
In a specific implementation, the plurality of time slots are continuous or discontinuous.
In an embodiment of the present invention, when the plurality of time slots are consecutive time slots, the base station 30 further includes: a second indication unit (not shown) adapted to indicate the number information of the consecutive plurality of time slots by means of a system message.
In an embodiment of the present invention, when the plurality of time slots are discontinuous plurality of time slots, the base station 30 further includes: a third indication unit (not shown) adapted to indicate the related information of the discontinuous plurality of time slots by means of a system message.
In a specific implementation, the information related to the discontinuous multiple time slots includes: the number information of the discontinuous plurality of time slots and the number information of time slots of intervals among the discontinuous plurality of time slots.
In a specific implementation, the scheduling resource information corresponding to each time slot is the same or different.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: and N groups of scheduling resource parameter information, wherein N is the number of the plurality of time slots.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: the method comprises the steps of carrying out scheduling on the same scheduling resource parameter information corresponding to a plurality of time slots and different scheduling resource parameter information corresponding to N groups of time slots, wherein N is the number of the time slots.
In a specific implementation, the scheduling resource parameters include: a modulation-demodulation policy parameter, an allocated physical resource block parameter, a power control parameter of MSG3 transmission, a duration of performing LBT.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: time slot information of a plurality of time slots and transmission resource information allocated corresponding to each time slot.
In a specific implementation, the workflow and principles of the base station 30 may refer to the description in the indication method of the scheduling resource provided in the above embodiment, which is not repeated herein.
In order to enable those skilled in the art to better understand and implement the present invention, an embodiment of the present invention further provides a terminal capable of implementing the above method for acquiring scheduling resources, as shown in fig. 4.
Referring to fig. 4, the terminal 40 may include: a second receiving unit 41 and a first acquiring unit 42, wherein:
the second receiving unit 41 is adapted to receive a random access response comprising scheduling resource information of a plurality of time slots.
The first obtaining unit 42 is adapted to obtain scheduling resource information of the plurality of time slots through the random access response.
In a specific implementation, the plurality of time slots are continuous or discontinuous.
In an embodiment of the present invention, the terminal 40 further includes: a third receiving unit (not shown) and a second acquisition unit (not shown), wherein:
the third receiving unit is adapted to receive the system message.
The second obtaining unit is adapted to obtain the number information of the continuous plurality of time slots through the system message.
In an embodiment of the present invention, the terminal 40 further includes: a third receiving unit (not shown) and a third acquiring unit (not shown), wherein:
the third receiving unit is adapted to receive the system message.
The third acquiring unit is adapted to acquire the related information of the discontinuous multiple time slots through the system message.
In a specific implementation, the information related to the discontinuous multiple time slots includes: the number information of the discontinuous plurality of time slots and the number information of time slots of intervals among the discontinuous plurality of time slots.
In a specific implementation, the scheduling resource information corresponding to each time slot is the same or different.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: and N groups of scheduling resource parameter information, wherein N is the number of the plurality of time slots.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: the method comprises the steps of carrying out scheduling on the same scheduling resource parameter information corresponding to a plurality of time slots and different scheduling resource parameter information corresponding to N groups of time slots, wherein N is the number of the time slots.
In a specific implementation, the scheduling resource parameters include: a modulation-demodulation policy parameter, an allocated physical resource block parameter, a power control parameter of MSG3 transmission, a duration of performing LBT.
In an embodiment of the present invention, when the scheduling resource information corresponding to each time slot is different, the scheduling resource information of the plurality of time slots includes: time slot information of a plurality of time slots and transmission resource information allocated corresponding to each time slot.
Optionally, the terminal 40 further includes: a transmitting unit (not shown) adapted to transmit the MSG3 at least once according to the scheduling resource information of the plurality of slots when the MSG3 is allowed to be transmitted.
In a specific implementation, the workflow and principles of the terminal 40 may refer to the description in the method for acquiring the scheduling resource provided in the foregoing embodiment, which is not repeated herein.
The embodiment of the invention provides a computer readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, and has computer instructions stored thereon, wherein the computer instructions execute any one of the above-mentioned indication methods of scheduling resources or any one of the corresponding steps of the method for acquiring scheduling resources when running, and are not described herein.
The embodiment of the invention provides a base station, which comprises a memory and a processor, wherein a computer instruction capable of running on the processor is stored in the memory, and the processor executes steps corresponding to any one of the above indication methods of scheduling resources when running the computer instruction, which are not described herein.
The embodiment of the invention provides a terminal, which comprises a memory and a processor, wherein a computer instruction capable of running on the processor is stored in the memory, and the processor executes steps corresponding to any one of the above methods for acquiring the scheduling resources when running the computer instruction, which are not described herein.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program to instruct related hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, etc.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (29)
1. An indication method for scheduling resources, comprising:
Receiving a preamble sent by a user terminal;
Determining scheduling resource information of a plurality of time slots, wherein the scheduling resource information of the plurality of time slots is used for the user terminal to send the MSG3 for a plurality of times;
And indicating the scheduling resource information of the plurality of time slots to the user terminal in a mode of random access response without modifying the format of the random access response media access control layer protocol data unit, so that the user terminal sends the MSG3 for a plurality of times on the scheduling resources of the plurality of time slots.
2. The method for indicating scheduled resources according to claim 1, it is characterized in that the method comprises the steps of,
Before the indicating the scheduling resource information of the plurality of time slots to the user terminal through the random access response, the method further comprises: and indicating the related information of the multi-time MSG3 through a system message.
3. The method of claim 1, wherein the indicating scheduling resource information of the plurality of slots to the user terminal through a random access response comprises:
performing LBT to obtain the use right of the idle channel;
And indicating scheduling resource information of the plurality of time slots to the user terminal through a random access response based on the idle channel.
4. The method of claim 1, wherein the plurality of time slots are consecutive plurality of time slots.
5. The method of claim 4, wherein the number information of the consecutive plurality of slots is determined by a predetermined value.
6. The method according to claim 4, wherein the number information of the consecutive plurality of slots is indicated by a system message.
7. The method for indicating scheduled resources according to claim 1, wherein the scheduled resource information corresponding to each time slot is the same.
8. The method for acquiring the scheduling resource is applied to the user terminal and is characterized by comprising the following steps:
transmitting a random access preamble;
Receiving a random access response, wherein the random access response comprises scheduling resource information of MSG3 sent by the user terminal in a plurality of time slots, and the format of a media access control layer protocol data unit of the random access response is maintained unchanged;
MSG3 is sent multiple times on the scheduled resources of the multiple time slots.
9. The method according to claim 8, wherein the information about the MSG3 transmitted in the plurality of slots is acquired by a system message before the random access response is received.
10. The method of claim 9, wherein the plurality of time slots are consecutive plurality of time slots.
11. The method for acquiring scheduling resources according to claim 10, wherein acquiring the related information of the plurality of time slot transmission MSG3 by the system message means acquiring the time slot number information of the plurality of time slot transmission MSG3 by the system message.
12. The method for acquiring scheduling resources according to claim 8, wherein the scheduling resource information for transmitting MSG3 in a plurality of slots is acquired by a value pre-agreed in the random access response.
13. The method for acquiring scheduling resources according to claim 8, wherein the scheduling resource information corresponding to each time slot is the same.
14. A base station, comprising:
A first receiving unit adapted to receive a preamble transmitted by a user terminal;
A determining unit adapted to determine scheduling resource information of a plurality of time slots; the scheduling resource information of the time slots is used for the user terminal to send the MSG3 for a plurality of times;
And the first indicating unit is suitable for indicating the scheduling resource information of the plurality of time slots to the user terminal in a mode of random access response without modifying the format of the random access response media access control layer protocol data unit, so that the user terminal sends the MSG3 for a plurality of times on the scheduling resources of the plurality of time slots.
15. The base station of claim 14, further comprising, prior to the indicating scheduling resource information for the plurality of time slots to the user terminal via a random access response: and indicating the plurality of time slots to send related information of the MSG3 through a system message.
16. The base station of claim 14, wherein the first indication unit comprises:
An execution subunit adapted to execute LBT to obtain the usage rights of the idle channels;
An indication subunit adapted to indicate the scheduling resource information of the plurality of time slots to the user terminal through a random access response based on the idle channel.
17. The base station of claim 14, wherein the plurality of time slots are consecutive plurality of time slots.
18. The base station of claim 14, wherein the number information of the plurality of time slots is determined by a predetermined value.
19. The base station of claim 17, wherein the number information of the consecutive plurality of time slots is indicated by a system message.
20. The base station of claim 14, wherein the scheduling resource information corresponding to each time slot is the same.
21. A user terminal, comprising:
A preamble transmitting unit adapted to transmit a random access preamble;
A second receiving unit, adapted to receive a random access response, where the random access response includes scheduling resource information of MSG3 sent by the user terminal in a plurality of time slots, and a medium access control layer protocol data unit format of the random access response is maintained unchanged;
And the MSG3 sending unit is suitable for sending the MSG3 for a plurality of times on the scheduling resources of the plurality of time slots.
22. The user terminal of claim 21, further comprising: and the MSG3 sending information acquisition unit is suitable for acquiring the related information of the MSG3 sent by the plurality of time slots through a system message before the random access response is received.
23. The user terminal of claim 22, wherein the plurality of time slots are consecutive plurality of time slots.
24. The terminal according to claim 23, wherein the MSG3 transmission information acquiring unit is adapted to acquire the slot number information of the MSG3 transmitted in a plurality of slots by a system message.
25. The user terminal of claim 21, further comprising: the first acquisition unit is adapted to acquire scheduling resource information of the MSG3 transmitted in a plurality of time slots through a value pre-agreed in the random access response.
26. The user terminal of claim 21, wherein the scheduling resource information corresponding to each slot is the same.
27. A computer readable storage medium, the computer readable storage medium being a non-volatile storage medium or a non-transitory storage medium, having stored thereon computer instructions, which when run perform the steps of the method of any of claims 1 to 7 or 8 to 13.
28. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any of claims 1 to 7.
29. A user terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, characterized in that the processor executes the steps of the method according to any of claims 8 to 13 when the computer instructions are executed.
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