CN111083797B - Configuration method and device of contention window - Google Patents

Configuration method and device of contention window Download PDF

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Publication number
CN111083797B
CN111083797B CN201910756894.XA CN201910756894A CN111083797B CN 111083797 B CN111083797 B CN 111083797B CN 201910756894 A CN201910756894 A CN 201910756894A CN 111083797 B CN111083797 B CN 111083797B
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msg
terminal
contention window
information
window
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CN111083797A (en
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刘娟
赵亚军
杨玲
李新彩
林伟
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ZTE Corp
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ZTE Corp
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Publication of CN111083797A publication Critical patent/CN111083797A/en
Priority to PCT/CN2020/100657 priority patent/WO2021031727A1/en
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

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

Abstract

The invention provides a configuration method of a contention window. Specifically, the method comprises the following steps: the terminal configures a contention window corresponding to the second Msg according to the information carried in the first Msg or the demodulation condition of the first Msg in the base station; wherein the first Msg is an Msg transmitted by the terminal, and the second Msg includes: and the Msg transmitted by the terminal at present. The terminal receives a third message Msg sent by the base station; the terminal configures a competition window corresponding to a fourth Msg according to the information carried in the third Msg; and the terminal transmits a fourth Msg according to a competition window of the fourth Msg, wherein the fourth Msg is the corresponding Msg transmitted by the next terminal.

Description

Configuration method and device of contention window
Technical Field
The present invention relates to the field of communications, and in particular, to a method and apparatus for configuring a contention window.
Background
The communication of 5G can meet the business requirements of the fields of human living, working, medical treatment, education and the like, the low-delay and high-speed are important characteristics of 5G, the 5G can be used for improving the voice and video communication quality, meanwhile, the enhancement is provided for various new services such as internet of things (IoT), automatic driving and the like, and meanwhile, the characteristics of large connection, high reliability and the like of the 5G lay a solid foundation for the development of various industries.
The 5G system is designed with licensed information transmission (NR) and unlicensed spectrum information transmission (NR-U). For unlicensed carrier operation, before each transmission procedure, especially for a random access procedure, a data transmission procedure or a signaling transmission procedure, LBT operation is almost needed, and in case of the LBT (listen before talk) mode of Category4, the uplink transmission procedure has a CW (contention window) adjustment procedure of contention window. However, in the SA scenario in the unlicensed band, the related art does not have an effective adjustment method for the contention window of the uplink transmission process.
Disclosure of Invention
The embodiment of the invention provides a method and a device for configuring a contention window, which are used for at least solving the problem that the contention window is not effectively regulated in the uplink transmission process in an SA scene in an unlicensed frequency band.
According to an embodiment of the present invention, there is provided a method for configuring a contention window, including: the terminal configures a contention window corresponding to the second Msg according to the information carried in the first Msg or the demodulation condition of the first Msg in the base station; wherein the first Msg is an Msg transmitted by the terminal, and the second Msg includes: and the Msg transmitted by the terminal at present.
According to an embodiment of the present invention, there is provided another method for configuring a contention window, including: the terminal receives a third message Msg issued by the base station; the terminal configures a competition window corresponding to a fourth Msg according to the information carried in the third Msg; and the terminal transmits a fourth Msg according to a competition window of the fourth Msg, wherein the fourth Msg is the corresponding Msg transmitted by the next terminal.
According to another embodiment of the present invention, there is provided a configuration apparatus for a contention window, including: the first configuration module is used for configuring a contention window corresponding to the second Msg according to the information carried in the first Msg or the receiving condition of the carried information at the base station end; wherein the second Msg comprises: and the Msg transmitted by the terminal at present.
According to another embodiment of the present invention, there is provided another contention window configuring apparatus including: the receiving module is used for receiving a third message Msg issued by the base station; the second configuration module is used for configuring a competition window corresponding to the fourth Msg according to the information carried in the third Msg; and the sending module is used for sending a fourth Msg according to the competition window of the fourth Msg, wherein the fourth Msg is the corresponding Msg transmitted by the next terminal.
According to a further embodiment of the invention, there is also provided a storage medium having stored therein a computer program, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
According to a further embodiment of the invention, there is also provided an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
According to the invention, the contention window of the Msg transmitted by the terminal at present is adjusted by utilizing the receiving condition of the Msg transmitted by the terminal at the base station end, and the contention window of the Msg transmitted by the terminal at next transmission is adjusted by the Msg transmitted by the base station or the Msg transmitted by the base station and the Msg transmitted by the terminal at present, so that the problem that in the SA scene in an unauthorized frequency band in the related technology, no effective adjustment of the contention window for the uplink transmission process is available can be solved, and the effect of effectively perfecting the contention window for the SA scene in the unauthorized frequency band and the uplink transmission process of the terminal is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a flowchart of a method for configuring a contention window according to an embodiment of the present application;
FIG. 2 is a schematic diagram showing the signal composition of a 2-step track according to an embodiment of the present application;
fig. 3 is a flowchart of another configuration method of contention windows according to an embodiment of the present application;
FIG. 4 is a schematic diagram showing the signal composition of a 4-step track according to an embodiment of the present application;
fig. 5 is a block diagram of a configuration apparatus of a contention window according to an embodiment of the present application;
fig. 6 is a block diagram of another configuration apparatus of a contention window according to an embodiment of the present application;
FIG. 7 is a schematic diagram showing the signal composition of another 2-step track according to an embodiment of the present application;
FIG. 8 is a schematic diagram of signal composition of another 4-step track according to an embodiment of the present application.
Detailed Description
The application will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
Example 1
In this embodiment, a method for configuring a contention window is provided, and fig. 1 is a flowchart of a method for configuring a contention window according to an embodiment of the present invention, as shown in fig. 1, where the flowchart includes the following steps:
step S102, the terminal configures a contention window corresponding to the second Msg according to the information carried in the first Msg or the demodulation condition of the first Msg in the base station; wherein the first Msg is an Msg transmitted by the terminal, and the second Msg includes: and the Msg transmitted by the terminal at present.
FIG. 2 is a schematic diagram showing the signal composition of a 2-step track according to an embodiment of the present invention. As shown in fig. 2, the Msg transmitted by the current terminal is MsgA, and then the terminal receives MsgB sent by the base station. The terminal then needs to make the next Msg transmission. It should also be noted that for 2-step rach, one MsgA consists of M or 1/M preambles and N or 1/N puschs, where M and N are both positive numbers equal to or greater than 1. Preferably, M has a value of 1,2,3,4,5; n is 1,2,3,4,5,6,7,8,9 and 10.
Optionally, the terminal configures a contention window of the MsgA according to information carried in the MsgA, including: and the terminal is configured according to the relation between the preamble information in the MsgA and the PUSCH information and the COT.
Optionally, the first Msg is transmission 1 in MsgA, then the second Msg is transmission 2, the relationship configuration of the information carried in the first Msg or the information carried in the first Msg and the COT adjusts the contention window of the second Msg, preferably, the CW of the first Msg is unchanged, and the CW of the second Msg is CWmin; or the CW of the first Msg is unchanged and the next allowable larger value of the second Msg CW; or the CW value of the first Msg is the same as that of the second Msg; preferably, transmission 1 is preamble information and transmission 2 is PUSCH.
Optionally, the first Msg is transmission 1 in MsgA, then the second Msg is transmission 2 in MsgA, and the information carried in the first Msg or the relationship configuration of the information carried in the first Msg and the COT adjusts the contention window of the second Msg, preferably, the CW of the first Msg is unchanged, and the CW of the second Msg is CWmin; or the CW of the first Msg is unchanged and the next allowable larger value of the second Msg CW; or the CW value of the first Msg is the same as that of the second Msg; preferably, transmission 1 is PUSCH and transmission 2 is preamble information.
Optionally, the configuring, by the terminal, a contention window corresponding to the second Msg according to the relationship between the preamble information, the PUSCH information and the COT in the MsgA includes: and when the preamble information and the PUSCH information are located in different COTs, the terminal keeps the contention window of different transmissions in the MsgA unchanged or the CW of the previous transmission unchanged, the CW of the latter transmission is CWmin or the CW of the previous transmission is unchanged, and the next allowable larger value of the CW of the latter transmission is obtained.
Optionally, the configuring, by the terminal, a contention window corresponding to the second Msg according to a relationship between the preamble information and PUSCH information in the MsgA and the COT, includes: and when the preamble information and the PUSCH information are positioned in the same COT, the terminal keeps the contention window of the MsgA unchanged and performs signal filling between the preamble information and the PUSCH information of the MsgA.
In particular, the channel is occupied by filling bits or transmitting other signals, ensuring that the signals between the signals are less than the interval. The specific interval comprises: 5us,9us,16us,25us.
Optionally, the terminal acquires the contention window of the MsgA by one of the following ways: the terminal determines the contention window of the MsgA according to the contention window information carried in the received SIB information; or the terminal randomly selects a contention window from contention windows in the LBT priority corresponding to the MsgA as the contention window of the MsgA.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
Example 2
In this embodiment, a method for configuring a contention window is provided, and fig. 3 is a flowchart of another method for configuring a contention window according to an embodiment of the present invention, as shown in fig. 3, where the flowchart includes the following steps:
step S302: the terminal receives a third message Msg issued by the base station;
step S304: the terminal configures a competition window corresponding to a fourth Msg according to the information carried in the third Msg;
step S306: and the terminal transmits a fourth Msg according to a competition window of the fourth Msg, wherein the fourth Msg is the corresponding Msg transmitted by the next terminal.
Here, the next transmission may be at least one of Msg1, msg3, GB-PUSCH (PUSCH on scheduling), GF-PUSCH (PUSCH on scheduling-free), PUCCH (uplink physical control channel), SRS, and the like.
Specifically, the following applies to the signal composition diagram of 2-step track shown in FIG. 2.
Optionally, the terminal configures a contention window corresponding to the fourth Msg according to information carried in the third Msg, including: and the terminal sets a contention window corresponding to the fourth Msg according to the receiving state of the Msg in a preset receiving window.
Optionally, the setting, by the terminal, a contention window corresponding to the fourth Msg according to the receiving state of the MsgB within a preset receiving window includes: the terminal sets a contention window corresponding to a fourth Msg according to a receiving state of the preamble information included in the MsgB in the preset receiving window, where the preamble information at least includes: RA-RNTI value, random access preamble identity in PDSCH.
Optionally, the terminal sets a contention window corresponding to the fourth Msg according to a receiving state of the preamble information included in the MsgB within the preset receiving window, including: when the fact that all the preamble information of the Msg is received in the preset receiving window is determined, the terminal sets a contention window corresponding to the fourth Msg as a contention window corresponding to a minimum window value in the LBT priority; when determining that the partial preamble information of the Msg is received in the preset receiving window, the terminal sets a contention window corresponding to the fourth Msg in one of the following manners: setting a contention window corresponding to the fourth Msg as a contention window of the MsgA currently transmitted by the terminal; setting the contention window corresponding to the fourth Msg as the contention window corresponding to the minimum window value in the LBT priority; setting a contention window corresponding to the fourth Msg to be a contention window which is larger than a contention window of the current terminal transmitting the MsgA; and when the preamble information of the Msg is not received in the preset receiving window, the terminal sets the contention window corresponding to the fourth Msg to be the next window value larger than the contention window of the current terminal for transmitting the Msg A.
Specifically, the receiving of the partial preamble information of the MsgB within the preset receiving window means that the terminal receives the RA-RNTI value, the part of the random access preamble identifier in the PDSCH, or only the RA-RNTI value or the random access preamble identifier in the PDSCH.
Optionally, the setting, by the terminal, a contention window corresponding to the fourth Msg according to the receiving state of the MsgB within a preset receiving window includes: the terminal sets a contention window corresponding to a fourth Msg according to a receiving state of PUSCH information included in the MsgB in the preset receiving window, where the PUSCH information at least includes: hybrid automatic repeat request, HARQ, ACK, information corresponding to PUSCH.
Optionally, the terminal sets a contention window corresponding to the fourth Msg according to a receiving state of PUSCH information included in the MsgB within the preset receiving window, including one of the following: when determining that the HARQ ACK information corresponding to at least one PUSCH is received in the preset receiving window, the terminal sets a contention window corresponding to the fourth Msg as a minimum window value in the LBT priority; when determining that the accuracy of all the HARQ ACK information corresponding to PUSCH received in the preset receiving window is smaller than a preset accuracy threshold, the terminal sets the contention window corresponding to the fourth Msg to be a window value which is larger than the contention window of the current transmission MsgA of the terminal; and when determining that the HARQ ACK information corresponding to the PUSCH is not received in the preset receiving window, the terminal sets the contention window corresponding to the fourth Msg to be a window value which is larger than the contention window of the current terminal for transmitting the Msg A.
Optionally, the setting, by the terminal, a contention window corresponding to the fourth Msg according to the receiving state of the MsgB within a preset receiving window includes: the terminal sets a contention window corresponding to the fourth Msg according to the receiving states of the preamble information and the PUSCH information included in the MsgB in the preset receiving window, where the preamble information at least includes: the random access preamble identifier in the RA-RNTI value and the PDSCH at least comprises the following PUSCH information: HARQ-ACK information corresponding to PUSCH.
Optionally, the setting, by the terminal, a contention window corresponding to the fourth Msg according to a reception state of the preamble information and the PUSCH information included in the MsgB within the preset reception window, includes: when the fact that all the preamble information and all the PUSCH information are received in the preset receiving window is determined, the terminal sets a contention window corresponding to the fourth Msg as a minimum window value in the LBT priority; when determining that a part of the preamble information or a part of the PUSCH information is received within the preset receiving window, the terminal sets a contention window corresponding to the fourth Msg by one of the following modes: setting a contention window corresponding to the fourth Msg as a window value of a contention window of the current terminal transmitting MsgA; setting the contention window corresponding to the fourth Msg as the minimum window value in the LBT priority; setting a contention window corresponding to the fourth Msg to be a window value of a contention window larger than the current transmission MsgA of the terminal; and when the fact that the preamble information and the PUSCH information are not received in the preset receiving window is determined, the terminal sets the contention window corresponding to the fourth Msg as the value of the contention window of the Msg A transmitted by the terminal at present.
FIG. 4 is a schematic diagram showing the signal composition of a 4-step track according to an embodiment of the present invention. As shown in fig. 4, the last terminal transmits the Msg1, and the terminal receives the Msg2 transmitted by the base station. The current Msg transmitted by the terminal is Msg3, and then the terminal receives Msg4 sent by the base station. Finally, the terminal needs to perform the next Msg transmission.
Optionally, when the first Msg is Msg2 received by the terminal and the second Msg is Msg3, the terminal configures a contention window corresponding to the second Msg according to information carried in the first Msg, including: and the terminal sets a contention window corresponding to the Msg3 according to the receiving state of the Msg2 in a preset receiving window.
Optionally, the setting, by the terminal, a contention window corresponding to the Msg3 according to a receiving state of the Msg2 within a preset receiving window includes: when determining that the Msg2 is completely received within the preset receiving window, the terminal sets a contention window corresponding to the Msg3 by one of the following modes: the terminal sets the contention window corresponding to the Msg3 as the contention window corresponding to the minimum window value in the LBT priority; the terminal sets the contention window corresponding to the Msg3 as the contention window corresponding to the Msg1 transmitted by the last terminal; and the terminal sets the contention window corresponding to the Msg3 as the contention window of the contention window which is larger than the contention window of the Msg1 transmitted by the previous terminal or as the next allowable larger value.
Note that if the HARQ ACK corresponding to the PUSCH in the MsgB is not received, or the corresponding control information is received, the 2-step rach may be degraded to the 4-step rach. The subsequent contention window adjustment may be in accordance with the 4-step rach CW adjustment scheme or in accordance with the 2-step rach next transmission CW adjustment scheme.
Optionally, when the third Msg is Msg4, the method further comprises: the terminal determines whether Msg4 was successfully received.
Optionally, upon successful reception of Msg4, the terminal configures a contention window corresponding to the fourth Msg according to one of the following manners: setting the contention window corresponding to the fourth Msg as the minimum window value in the LBT priority; determining a contention window of the fourth Msg according to contention window information carried in the received SIB information; and randomly selecting a contention window from the contention window in the LBT priority corresponding to the fourth Msg as the contention window of the fourth Msg.
Optionally, when failing to receive the Msg4, the terminal configures a contention window corresponding to the fourth Msg according to one of the following manners: setting a contention window corresponding to the fourth Msg to be a contention window which is the next contention window larger than the contention window of the current terminal transmitting Msg 3; the terminal determines a contention window of the fourth Msg according to contention window information carried in the received SIB information; and the terminal randomly selects a contention window from contention windows in the LBT priority corresponding to the fourth Msg as the contention window of the fourth Msg. Optionally, before the terminal sends the fourth Msg according to the contention window of the fourth Msg, the method further includes: and the terminal configures a contention window corresponding to a fourth Msg according to the information carried in the third Msg and the information carried in the Msg transmitted by the terminal.
Specifically, the method is mainly applied to the signal composition diagram of 4step rach shown in fig. 4.
Optionally, when Msg4 is successfully received and when Msg3 transmitted by the terminal is sent within a receiving window in which Msg2 is completely received, the terminal configures a contention window corresponding to the fourth Msg according to one of the following manners: setting the contention window corresponding to the fourth Msg as the contention window corresponding to the minimum window value in the LBT priority; determining a contention window of the fourth Msg according to contention window information carried in the received SIB information; and randomly selecting a contention window from the contention window in the LBT priority corresponding to the fourth Msg as the contention window of the fourth Msg.
Optionally, when Msg4 is failed to be received, and when Msg3 transmitted by the terminal is sent within a receiving window in which Msg2 is completely received, the terminal configures a contention window corresponding to the fourth Msg according to one of the following manners: setting the contention window corresponding to the fourth Msg as the contention window corresponding to the minimum window value in the LBT priority; determining a contention window of the fourth Msg according to contention window information carried in the received SIB information; randomly selecting a contention window from contention windows in the LBT priority corresponding to the fourth Msg as the contention window of the fourth Msg; setting a contention window corresponding to the fourth Msg to be a contention window which is the next contention window larger than the contention window of the current terminal transmitting Msg 3; and setting the contention window corresponding to the fourth Msg to be the next contention window larger than the contention window of the current terminal transmitting Msg 3.
Optionally, when Msg4 is successfully received and when Msg3 transmitted by the terminal is not sent within a receiving window in which Msg2 is completely received, the terminal configures a contention window corresponding to the fourth Msg according to one of the following manners: setting the contention window corresponding to the fourth Msg as the contention window corresponding to the minimum window value in the LBT priority; determining a contention window of the fourth Msg according to contention window information carried in the received SIB information; and randomly selecting a contention window from the contention window in the LBT priority corresponding to the fourth Msg as the contention window of the fourth Msg.
Optionally, when Msg4 is failed to be received, and when Msg3 transmitted by the terminal is not sent within a receiving window in which Msg2 is completely received, the terminal configures a contention window corresponding to the fourth Msg according to one of the following manners: setting the contention window corresponding to the fourth Msg to be a next value (a next allowable larger value) larger than the contention window of the current terminal transmission Msg 3; the terminal determines a contention window of the fourth Msg according to contention window information carried in the received SIB information; and the terminal randomly selects a contention window from contention windows in the LBT priority corresponding to the fourth Msg as the contention window of the fourth Msg.
In order to better understand the technical solution described in the foregoing embodiments, the following scenario is provided for easy understanding:
scene 1:
for 2-step rach, one MsgA consists of M or 1/M preambles and N or 1/N puschs, where M and N are both positive numbers of 1 or more.
(1) Window value for MsgA currently transmitted:
when the preamble and the pusch are not within the same COT, the CW value of the different transmissions (preamble transmission and pusch transmission) remains unchanged. For example, the CW value of MsgA in fig. 2 is still maintained. In addition, the acquisition mode of the initially transmitted CW informs the terminal node through SIB (System Information Block ) information;
specifically, the SIB message includes SIB1 or SIB2 or SIB3 or SIB4 or SIB5 or SIB6 or SIB7 or SIB8 or SIB9.
(2) Window value for Msg for the next transmission:
mode one: the terminal informs the terminal node through the SIB message information.
Mode two: the terminal adjusts by the demodulation status of preamble and pusch. The adjustment is mainly performed according to the terminal receiving the MsgB within the expected receiving window (the MsgB contains the PDCCH scrambled by the RA-RNTI, the random Access Preamble IDentifier in the PDSCH or the HARQ ACK information corresponding to the PUSCH),
If all MsgB received in the expected receiving window contains HARQ ACK information corresponding to the PDCCH scrambled by RA-RNTI, random Access Preamble IDentifier (random access preamble identifier) in PDSCH or PUSCH, the CW value is set to CWmin (minimum contention window);
if no information of MsgB is received within the expected reception window, the CW value is set to the CW value to the next allowed larger value.
Here, the next transmission may be Msg1, msg3, GB-PUSCH, GF-PUSCH, PUCCH, SRS, or the like, or at least one of the above signals.
Note that if the HARQ ACK corresponding to the PUSCH in the MsgB is not received, or the corresponding control information is received, the 2-step rach may be degraded to the 4-step rach. The subsequent adjustment of the CW may be in accordance with a 4-step rach CW adjustment scheme or in accordance with a 2-step rach next transmission CW adjustment scheme.
Scene 2:
for 2-step rach, one MsgA consists of M or 1/M preambles and N or 1/N puschs, where M and N are both positive numbers of 1 or more.
(1) Window value for MsgA currently transmitted:
when the preamble and the pusch are within the same COT, the signal transmission has no CW adjustment; or Cat2 is used for later transmissions. Meanwhile, filling bits or transmitting other signals between the preamble and the pusch is needed to occupy channels, and the signals between the signals are ensured to be smaller than the interval. Typically, the spacing is 5us,9us,16us,25us. In addition, the acquisition mode of the initially transmitted CW informs the terminal node through the SIB information, or the terminal of the acquisition mode of the initially transmitted CW randomly selects in the CW value of the corresponding LBT priority level;
(2) Window value for Msg for the next transmission:
specifically, the acquisition mode of the CW informs the terminal node through SIB information;
mode one: the terminal randomly selects from CW values of corresponding LBT priority levels;
mode two: the CW value is adjusted according to the demodulation conditions of preamble and pusch,
specifically, the adjustment is performed mainly according to whether or not the terminal receives the MsgB (the MsgB contains the PDCCH scrambled by the RA-RNTI, the HARQ ACK information corresponding to random Access Preamble IDentifier or PUSCH in the PDSCH) within the expected reception window.
If all MsgB containing the HARQ ACK information corresponding to random Access Preamble IDentifier in the PDCCH scrambled by the RA-RNTI or the PUSCH is received in the expected receiving window, the CW value is set to be CWmin;
if the partial MsgB received in the expected receiving window contains at least one of the HARQ ACK information corresponding to random Access Preamble IDentifier in the PDCCH scrambled by the RA-RNTI or the PDSCH or the PUSCH, the CW value is unchanged;
if no information of MsgB is received within the expected reception window, the CW value is set to the CW value to the next allowed larger value.
Here, the next transmission may be Msg1, msg3, GB-PUSCH, GF-PUSCH, PUCCH, SRS, or the like, or at least one of the above signals.
Note that if the HARQ ACK corresponding to the PUSCH in the MsgB is not received, or the corresponding control information is received, the 2-step rach may be degraded to the 4-step rach. The subsequent adjustment of the CW may be in accordance with a 4-step rach CW adjustment scheme or in accordance with a 2-step rach next transmission CW adjustment scheme.
Scene 3:
for the next transmission in the 2-step slot of figure 2,
specifically, the acquisition mode of the CW informs the terminal node through SIB information;
mode one: the terminal randomly selects from CW values of corresponding LBT priority levels;
in the second mode, the CW value is adjusted by the demodulation status of the preamble,
specifically, the adjustment is performed mainly according to whether the terminal receives MsgB (the MsgB contains HARQ ACK information corresponding to random Access Preamble IDentifier in the PDCCH or the PUSCH scrambled by RA-RNTI) within an expected receiving window,
if all MsgB containing the RA-RNTI scrambled PDCCH or random Access Preamble IDentifier in PDSCH is received in the expected receiving window, the CW value is set to CWmin;
if the partial MsgB received in the expected receiving window contains at least one of random Access Preamble IDentifier signals in the PDCCH and PDSCH scrambled by the RA-RNTI, the CW value is unchanged;
If no information of MsgB is received within the expected reception window, the CW value is set to the CW value to the next allowed larger value.
Here, the next transmission may be MsgA, msg1, msg3, GB-PUSCH, GF-PUSCH, PUCCH, SRS, or the like, or at least one of the above signals.
Note that if the HARQ ACK corresponding to the PUSCH in the MsgB is not received, or the corresponding control information is received, the 2-step rach may be degraded to the 4-step rach. The subsequent adjustment of the CW may be in accordance with a 4-step rach CW adjustment scheme or in accordance with a 2-step rach next transmission CW adjustment scheme.
Scene 4:
for the Msg3 and the next transmission for 4-step rach in figure 4,
(1) Window value for Msg3 currently transmitted:
mode one: the terminal randomly selects from CW values of corresponding LBT priority levels;
specifically, the acquisition mode SIB information of the CW notifies the terminal node;
mode two: adjustment of the CW of Msg3 may refer to reception of Msg2 (random Access Preamble IDentifier in PDCCH and PDSCH containing RA-RNTI scrambling);
if all msg2 (random Access Preamble IDentifier in PDCCH and PDSCH containing RA-RNTI scrambling) is received in the intended receive window, the CW value is set to CWmin;
If the expected receive window does not receive all msg2 (containing random Access Preamble IDentifier in the RA-RNTI scrambled PDCCH and PDSCH), then the CW value is set to the next allowed larger value;
(2) Window value for Msg for the next transmission:
when the Msg4 is successfully adjusted by the terminal CWS; the CW value is set to CWmin;
here, the next transmission may be at least one of the above signals such as Msg1, msg3, GB-PUSCH, GF-PUSCH, PUCCH, SRS, and the like.
Scene 5:
for the Msg3 and the next transmission for 4-step rach in figure 4,
(1) Window value for Msg3 currently transmitted:
mode one: the terminal randomly selects from CW values of corresponding LBT priority levels;
specifically, the acquisition mode of the CW informs the terminal node through SIB information;
in the second mode, the adjustment of the CW of Msg3 can refer to the reception of Msg2 (random Access Preamble IDentifier in PDCCH and PDSCH including RA-RNTI scrambling);
if all msg2 (random Access Preamble IDentifier in PDCCH and PDSCH containing RA-RNTI scrambling) are received in the intended receive window, the CW value is set to constant;
if the expected receive window does not receive all msg2 (containing random Access Preamble IDentifier in the RA-RNTI scrambled PDCCH and PDSCH), then the CW value is set to the next allowed larger value;
(2) Window value for Msg for the next transmission:
adjustment of the CWS for Msg4 failure; the next allowed larger value for the CW value;
the next transmission here may be at least one of the above signals of MsgA, msg1, msg3, GB-PUSCH, GF-PUSCH, PUCCH, SRS, and the like.
Scene 6:
for the Msg3 and the next transmission for 4-step rach in figure 4,
(1) Window value for Msg3 currently transmitted:
mode one: the terminal randomly selects from CW values of corresponding LBT priority levels;
specifically, the acquiring mode of the CW can notify the terminal node through SIB information;
mode two: adjustment of the CW of Msg3 may refer to reception of Msg2 (random Access Preamble IDentifier in PDCCH and PDSCH containing RA-RNTI scrambling);
the specific mode is as follows:
if all msg2 (random Access Preamble IDentifier in PDCCH and PDSCH containing RA-RNTI scrambling) is received in the intended receive window, the CW value is set to CWmin;
if all msg2 (random Access Preamble IDentifier in PDCCH and PDSCH containing RA-RNTI scrambling) are received in the expected receive window, the CW value is unchanged;
if all msg2 (containing random Access Preamble IDentifier in the RA-RNTI scrambled PDCCH and PDSCH) are received in the unexpected receive window, the CW value is set to the next allowed larger value;
(2) Window value for Msg for the next transmission:
mode one: upon successful adjustment of the terminal CWS for Msg4, the CW is adjusted by one of the following:
the terminal sets the CW value to CWmin;
the terminal obtains a CW value through a control channel or SIB information;
the terminal randomly selects a CW value within the allowed CW value range.
Mode two: adjustment of the CWS for Msg4 failure, the CW is adjusted by one of the following:
the terminal sets the next allowable larger value as the CW value;
the terminal obtains a CW value through a control channel or SIB information;
the terminal randomly selects a CW value within the allowed CW value range.
Mode three: for a terminal for which Msg3 sends in a window where Msg2 is expected to be received, msg4 is successful; the CW is adjusted by one of the following:
the terminal sets the CW value to CWmin;
the terminal obtains a CW value through a control channel or SIB information;
the terminal randomly selects a CW value within the allowed CW value range.
Mode four: for a terminal whose Msg3 sends in a window where Msg2 is expected to be received, msg4 fails; the CW is adjusted by one of the following:
the terminal sets the next allowable larger value to the CW value
The terminal sets the next allowable larger value as the CW value;
the terminal obtains a CW value through a control channel or SIB information;
The terminal randomly selects a CW value within an allowable CW value range;
the terminal sets the CW value to CWmin.
Mode five: for Msg3 not sent in the window where Msg2 is expected to be received; a successful termination of Msg 4; the CW is adjusted by one of the following:
the terminal sets the CW value to CWmin;
the terminal obtains a CW value through a control channel or SIB information;
the terminal randomly selects CW values within the allowed CW value range
Mode six: for Msg3 not sent in the window where Msg2 is expected to be received; and (3) a terminal with Msg4 failure. The CW is adjusted by one of the following:
the terminal sets the next allowable larger value as the CW value;
the terminal obtains a CW value through a control channel or SIB information;
the terminal randomly selects a CW value within the allowed CW value range.
Here, the next transmission may be at least one of the above signals such as Msg1, msg3, GB-PUSCH, GF-PUSCH, PUCCH, SRS, and the like.
It should be noted that, in the above embodiments, the contention window configuration for the Msg transmitted by the next terminal is mainly described. However, in reality, since the interaction of Msg is continuous among the 2-Step Rach scene or the 4-Step Rach scene, the same can be given to the scene of the scheme described in the above embodiment 2 for the Msg that needs to be transmitted by the subsequent terminal.
Scene 7:
FIG. 7 is a diagram showing the signal composition of another 2-step track according to an embodiment of the present invention. As shown in fig. 7, the last terminal transmits MsgA, and then the terminal receives MsgB transmitted by the base station. The current Msg transmitted by the terminal is a fourth Msg (MsgA, GB-PUSCH, GF-PUSCH, PUCCH, SRS), and then the terminal receives a fifth Msg sent by the base station. Finally, the terminal needs to make the next sixth MSg transmission. While fig. 7 is merely illustrative. After the sixth MSg transmission, the interaction of Msg between the terminal and the base station is also required. But only one of them is given here for the sake of example clarity. The configuration of the contention window of the Msg for subsequent transmission may be extended based on the following description, and will not be described in detail herein.
In determining the contention window of the sixth Msg, configuration information of the fifth Msg includes, but is not limited to, one of the following:
setting a contention window corresponding to the sixth Msg as a contention window of a fourth Msg transmitted by the terminal at present;
setting the contention window corresponding to the sixth Msg as the contention window corresponding to the minimum window value in the LBT priority;
setting a contention window corresponding to the sixth Msg as a contention window which is larger than a contention window of the fourth Msg transmitted by the terminal at present;
If the fourth Msg is different from the MsgA transmitted by the current terminal, setting the contention window corresponding to the sixth Msg as the contention window of the MsgA transmitted by the current terminal;
in addition, considering that the number of msgs transmitted by the subsequent terminal is too large, the Msg transmitted by each terminal and the contention window configured correspondingly may be stored in the Msg list. In addition, the configuration mode, for example, whether the contention window is the same as the contention window of the Msg transmitted last, the contention window corresponding to the minimum window value in the LBT priority, or the next contention window greater than the Msg transmitted by the terminal currently is written together. When the subsequent terminal calls the list, the subsequent terminal can select according to actual needs, so that the consumption of resources is reduced, and the speed of competing window configuration is accelerated.
Scene 8:
FIG. 8 is a schematic diagram of signal composition of another 4-step track according to an embodiment of the present invention. As shown in fig. 8, on the basis of fig. 4, the fourth Msg transmitted by the previous terminal is received by the terminal, and then the seventh Msg transmitted by the base station is received by the terminal, the Msg transmitted by the current terminal is the eighth Msg, and then the ninth Msg transmitted by the base station is received by the terminal. Finally, the terminal needs to perform the next tenth Msg transmission.
First, the terminal may adjust the eighth Msg transmitted by the current terminal based on the seventh Msg received by the terminal. Meanwhile, during the adjustment process, it is also necessary to determine whether the eighth Msg is completely received within the preset receiving window of the seventh Msg. If the terminal receives the contention window completely, the terminal sets the contention window corresponding to the Msg3 by one of the following modes:
the terminal sets the contention window corresponding to the eighth Msg as the contention window corresponding to the minimum window value in the LBT priority;
the terminal sets the contention window corresponding to the eighth Msg as the contention window corresponding to the fourth Msg transmitted by the last terminal;
if the eighth Msg is different from the Msg3 and the Msg1 transmitted by the current terminal, setting the contention window corresponding to the tenth Msg as the contention window of the Msg3 or the Msg 1;
and the terminal sets the contention window corresponding to the Msg3 as the contention window of the fourth Msg which is larger than the last terminal to transmit.
And if the terminal receives the data, setting the contention window corresponding to the eighth Msg as the contention window corresponding to the minimum window value in the LBT priority.
Secondly, it may also be determined, based on the terminal, whether the ninth Msg successfully receives the contention window configuration of the tenth Msg for the next terminal transmission, including at least:
Upon successful reception of the ninth Msg, a configuration comprising at least one of:
setting the contention window corresponding to the tenth Msg as the contention window corresponding to the minimum window value in the LBT priority;
determining a contention window of the tenth Msg according to contention window information carried in the received SIB information;
and randomly selecting a contention window from the contention window in the LBT priority corresponding to the tenth Msg as the contention window of the tenth Msg.
Upon failure to receive the ninth Msg, a configuration including at least one of:
setting a contention window corresponding to the tenth Msg to be a contention window which is the next contention window larger than the contention window of the current terminal transmission Msg 3;
the terminal determines a contention window of the tenth Msg according to contention window information carried in the received SIB information;
and the terminal randomly selects a contention window from contention windows in the LBT priority corresponding to the tenth Msg as the contention window of the tenth Msg.
Finally, second, it may also be determined whether the ninth Msg is successfully received and whether the eighth Msg is completely received within a preset receiving window of the seventh Msg based on the terminal.
When the ninth Msg is successfully received and when the eighth Msg transmitted by the terminal is sent in the receiving window of the seventh Msg, the terminal configures a contention window corresponding to the tenth Msg according to one of the following modes:
Setting the contention window corresponding to the tenth Msg as the contention window corresponding to the minimum window value in the LBT priority;
determining a contention window of the tenth Msg according to contention window information carried in the received SIB information;
and randomly selecting a contention window from the contention window in the LBT priority corresponding to the tenth Msg as the contention window of the tenth Msg.
When the reception of the ninth Msg fails, and when the eighth Msg transmitted by the terminal is sent within the reception window of the seventh Msg, the terminal configures a contention window corresponding to the tenth Msg according to one of the following modes:
setting the contention window corresponding to the tenth Msg as the contention window corresponding to the minimum window value in the LBT priority;
determining a contention window of the tenth Msg according to contention window information carried in the received SIB information;
randomly selecting a contention window from contention windows in the LBT priority corresponding to the tenth Msg as the contention window of the tenth Msg;
setting a contention window corresponding to the tenth Msg to be a contention window which is the next larger than a contention window of the eighth Msg transmitted by the terminal currently;
setting a contention window corresponding to the tenth Msg to be a contention window which is the next larger than a contention window of the eighth Msg transmitted by the terminal currently;
When the ninth Msg is successfully received and when the eighth Msg transmitted by the terminal is not completely received and sent in the receiving window of the seventh Msg, the terminal configures a contention window corresponding to the tenth Msg according to one of the following modes:
setting the contention window corresponding to the tenth Msg as the contention window corresponding to the minimum window value in the LBT priority;
determining a contention window of the tenth Msg according to contention window information carried in the received SIB information;
and randomly selecting a contention window from the contention window in the LBT priority corresponding to the tenth Msg as the contention window of the tenth Msg.
When the ninth Msg is failed to be received and when the eighth Msg transmitted by the terminal is not completely received and sent in the receiving window of the seventh Msg, the terminal configures a contention window corresponding to the tenth Msg according to one of the following modes:
setting a contention window corresponding to the tenth Msg to be a contention window which is the next larger than a contention window of the eighth Msg transmitted by the terminal currently;
the terminal determines a contention window of the tenth Msg according to contention window information carried in the received SIB information;
and the terminal randomly selects a contention window from contention windows in the LBT priority corresponding to the tenth Msg as the contention window of the tenth Msg. In addition, considering that the number of msgs transmitted by the subsequent terminal is too large, the Msg transmitted by each terminal and the contention window configured correspondingly may be stored in the Msg list. In addition, the configuration mode is, for example, whether the contention window is the same as the contention window of the Msg transmitted last, the contention window corresponding to the minimum window value in the LBT priority, or the next contention window greater than the Msg transmitted by the terminal currently, or determined according to the contention window information carried in the received SIB information, or the contention window selected randomly from the contention windows in the LBT priority corresponding to the Msg is written together. When the subsequent terminal calls the list, the subsequent terminal can select according to actual needs, so that the consumption of resources is reduced, and the speed of competing window configuration is accelerated.
Example 3
The embodiment also provides a device for configuring a contention window, which is used to implement the foregoing embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
Fig. 5 is a block diagram of a configuration apparatus for a contention window according to an embodiment of the present invention, as shown in fig. 5, including:
the first configuration module 52 is configured to configure a contention window corresponding to the second Msg according to information carried in the first Msg or a demodulation condition of the first Msg at the base station end; wherein the first Msg is an Msg transmitted by the terminal, and the second Msg includes: and the Msg transmitted by the terminal at present.
It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.
Example 4
The embodiment also provides a device for configuring a contention window, which is used to implement the foregoing embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
Fig. 6 is a block diagram of another configuration apparatus for a contention window according to an embodiment of the present invention, as shown in fig. 6, including:
a receiving module 62, configured to receive a third message Msg issued by the base station;
a second configuration module 62, configured to configure a contention window corresponding to a fourth Msg according to information carried in the third Msg;
and a sending module 64, configured to send a fourth Msg according to a contention window of the fourth Msg, where the fourth Msg is the Msg corresponding to the transmission of the next terminal.
Example 5
An embodiment of the invention also provides a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
Alternatively, in the present embodiment, the above-described storage medium may be configured to store a computer program for performing the steps of:
s1, a terminal configures a contention window corresponding to a second Msg according to information carried in the first Msg or the demodulation condition of the first Msg in a base station; wherein the first Msg is an Msg transmitted by the terminal, and the second Msg includes: and the Msg transmitted by the terminal at present.
Or alternatively, the first and second heat exchangers may be,
s1, a terminal receives a third message Msg sent by a base station;
s2, the terminal configures a competition window corresponding to a fourth Msg according to the information carried in the third Msg;
and S3, the terminal transmits a fourth Msg according to a competition window of the fourth Msg, wherein the fourth Msg is the corresponding Msg transmitted by the next terminal.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing a computer program.
An embodiment of the invention also provides an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, where the transmission device is connected to the processor, and the input/output device is connected to the processor.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program:
s1, a terminal configures a contention window corresponding to a second Msg according to information carried in the first Msg or the demodulation condition of the first Msg in a base station; wherein the first Msg is an Msg transmitted by the terminal, and the second Msg includes: and the Msg transmitted by the terminal at present.
Or alternatively, the first and second heat exchangers may be,
s1, a terminal receives a third message Msg sent by a base station;
s2, the terminal configures a competition window corresponding to a fourth Msg according to the information carried in the third Msg;
and S3, the terminal transmits a fourth Msg according to a competition window of the fourth Msg, wherein the fourth Msg is the corresponding Msg transmitted by the next terminal.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.
Example 6
In this embodiment, the minimum value or minimum window value in the LBT priority is the next larger value/the next allowed larger value, and the description of the next allowed larger value.
In the method of LBT of Cat4, different priority levels are corresponding, each priority level corresponding to a different combination of CW admission adjustments.
We choose one of the priority levels, the corresponding CW set is {15,31,63,127,255,511,1023}; if the current CW value is 63, then the minimum value or minimum window value in the priority is 15, the next larger value is 127, and the next larger value is 255.
If the current CW value is 511, the minimum value or minimum window value in the priority is 15, the next larger value is 1023, the next larger value may be related according to the allowable number K of maximum values, and if the maximum allowable number K is 1, the next larger value is 15; if the maximum allowable number K is greater than 1, then the next larger value is 1023.
It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may alternatively be implemented in program code executable by computing devices, so that they may be stored in a memory device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A method for configuring a contention window, comprising:
the terminal configures a contention window corresponding to a second Msg in the MsgA according to information carried in the first Msg in the MsgA, and the method comprises the following steps: the terminal configures a contention window corresponding to the second Msg according to the relation between the preamble information in the first Msg and the PUSCH information and the COT; wherein the first Msg is an Msg transmitted by the terminal, and the second Msg includes: msg transmitted by the terminal at present;
the terminal configures a contention window corresponding to a second Msg according to the relation between the preamble information and the PUSCH information in the first Msg and the COT, including: when the preamble information and the PUSCH information are located in different COTs, the terminal keeps the contention window of the first Msg unchanged; and when the preamble information and the PUSCH information are positioned in the same COT, the terminal keeps the contention window of the first Msg unchanged and performs signal filling between the preamble information and the PUSCH information of the first Msg.
2. The method of claim 1, wherein the terminal obtains the contention window of the first Msg by one of:
the terminal determines a contention window of the first Msg according to contention window information carried in the received SIB information; or alternatively, the first and second heat exchangers may be,
and the terminal randomly selects a contention window from contention windows in the LBT priority corresponding to the first Msg as the contention window of the first Msg.
3. A contention window configuring apparatus, comprising:
the first configuration module is configured to configure a contention window corresponding to a second Msg in the MsgA according to information carried in the first Msg in the MsgA, and includes: the terminal configures a contention window corresponding to the second Msg according to the relation between the preamble information in the first Msg and the PUSCH information and the COT; wherein the first Msg is an Msg transmitted by a terminal, and the second Msg includes: msg transmitted by the terminal at present;
the terminal configures a contention window corresponding to a second Msg according to the relation between the preamble information and the PUSCH information in the first Msg and the COT, including: when the preamble information and the PUSCH information are located in different COTs, the terminal keeps the contention window of the first Msg unchanged; and when the preamble information and the PUSCH information are positioned in the same COT, the terminal keeps the contention window of the first Msg unchanged and performs signal filling between the preamble information and the PUSCH information of the first Msg.
4. A storage medium having a computer program stored therein, wherein the computer program is arranged to perform the method of any of claims 1-2 when run.
5. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the method of any of the claims 1-2.
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