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WO2021208042A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2021208042A1
WO2021208042A1 PCT/CN2020/085208 CN2020085208W WO2021208042A1 WO 2021208042 A1 WO2021208042 A1 WO 2021208042A1 CN 2020085208 W CN2020085208 W CN 2020085208W WO 2021208042 A1 WO2021208042 A1 WO 2021208042A1
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WIPO (PCT)
Prior art keywords
preamble
access network
network device
terminal
time domain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/085208
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English (en)
Chinese (zh)
Inventor
罗青全
花梦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2020/085208 priority Critical patent/WO2021208042A1/fr
Priority to CN202080001565.5A priority patent/CN113812202B/zh
Publication of WO2021208042A1 publication Critical patent/WO2021208042A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • the network may configure a supplementary uplink for NR (supplementary uplink, SUL) carrier.
  • the terminal can access long term evolution (LTE) base stations and NR base stations.
  • LTE long term evolution
  • the SUL of the NR base station can be the same as the carrier used by the LTE base station. In this case, some terminals need to be time-division multiplexed Way to share the carrier. If the terminal first accesses the LTE base station, the terminal needs to use a timing advance (TA) when sending data to the LTE base station on this carrier.
  • TA timing advance
  • the terminal needs to access the NR base station, it needs to send the data to the NR base station.
  • the TA used by default when sending a preamble is 0. This may cause the time domain resources occupied by the terminal to send the preamble to the NR base station and the time domain resources occupied by the data to the LTE base station to overlap, so that The preamble and data interfere with each other.
  • the embodiments of the present application provide a communication method and device, which are used to avoid the problem of mutual interference between preamble and data in a dual-connection scenario.
  • a communication method which includes: establishing an RRC connection between a terminal and a first access network device in a first frequency band; When the time domain resources occupied by the preamble of the second access network device overlap, the terminal determines the first TA used when sending the preamble to the second access network device.
  • the first TA is greater than 0, and the first access network device and the second access network device The network standards of the two access network devices are different; the terminal uses the first TA to send the preamble to the second access network device in the second frequency band, and there is overlap between the first frequency band and the second frequency band.
  • the terminal can use the first TA with a value greater than 0 to send the preamble to the second access network device, thereby avoiding the time domain resources and time domain resources occupied by the preamble.
  • the time domain resources occupied by data overlap too much, thereby avoiding interference and improving the success rate of network access.
  • the first TA is related to the length of the preamble, and the longer the preamble, the larger the first TA.
  • the longer the preamble the more time-domain resources occupied by the preamble and the time-domain resources occupied by the data overlap.
  • the first TA is related to the index of the start symbol of the preamble, and the larger the index of the start symbol of the preamble, the larger the first TA.
  • the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap more.
  • the first The larger the TA the better to avoid the time domain resources occupied by the preamble and the time domain resources occupied by the data from overlapping too much.
  • the length of the preamble is determined according to the format of the preamble. This possible implementation provides a way to determine the length of the preamble.
  • the information used to indicate the format of the preamble is carried in the MIB or SIB.
  • This possible implementation provides two methods for carrying information in the preamble format.
  • the first TA is related to the second TA, the larger the second TA, the larger the first TA, and the second TA is the TA used when the terminal sends data.
  • the second TA is the TA used when the terminal sends data.
  • the first TA is larger, then It can better avoid the time domain resources occupied by the preamble and the time domain resources occupied by the data from overlapping too much.
  • the method further includes: the terminal receives a message from the first access network device, and the message includes information for determining the second TA.
  • the information used to determine the second TA is the value of the second TA, and the second TA is carried in message 2; or the information used to determine the second TA is used to update the second TA The offset value.
  • the first TA is related to the uplink transmission timing deviation between the first access network device and the second access network device, and the greater the uplink transmission timing deviation, the larger the first TA.
  • the greater the deviation of the uplink transmission timing the more time-domain resources occupied by the preamble and the time-domain resources occupied by the data overlap.
  • the first TA is larger, It can better avoid the time domain resources occupied by the preamble and the time domain resources occupied by the data from overlapping too much.
  • the first TA satisfies the following conditions: MAX(0,TA Lte -T t_max -DIS Preamble ) ⁇ TA nr_Preamble ⁇ TA Lte ; where TA nr_Preamble is the first TA and MAX is the maximum value Function, TA Lte is the second TA used when the terminal sends data, T t_max is the uplink transmission timing deviation between the first access network device and the second access network device, and DIS Preamble is the end time when the terminal sends the preamble to For a period of time at the end of the time slot, the time slot is the time slot to which the end time belongs.
  • the value of the first TA can avoid too much overlap of the time domain resources occupied by the preamble and the time domain resources occupied by the data.
  • the method further includes: the terminal receives a third TA from the second access network device, where the third TA is the TA calculated by the second access network device for the terminal according to the preamble; The TA is updated to the fourth TA, and the fourth TA is used to send the message 3 to the second access network device, and the fourth TA is the sum of the first TA and the third TA.
  • the second access network device after the terminal sends the preamble to the second access network device, the second access network device will issue a third TA to the terminal. Because the third TA is measured based on the preamble, the preamble The code is sent based on the first TA.
  • the actual TA between the terminal and the second access network device should be the sum of the first TA and the third TA (that is, the fourth TA). Therefore, by updating the first TA, The terminal can use the correct TA (that is, the fourth TA) to send the message 3 to the second access network device.
  • the information used to determine the time domain resource of the data is carried in the MIB or SIB.
  • the first access network device is an access network device in an LTE system
  • the second access network device is an access network device in an NR system.
  • a communication method including: a terminal establishes an RRC connection with a first access network device in a first frequency band; the terminal uses a first TA to send a preamble to a second access network device in a second frequency band ,
  • the network standards of the first access network device and the second access network device are different, there is an overlap between the first frequency band and the second frequency band, and the value of the first TA is 0;
  • the terminal delays sending the data to the first access network device.
  • the terminal delays sending data to the first access network device, thereby avoiding too much overlap between the time domain resources occupied by the preamble and the time domain resources occupied by the data , Thereby avoiding interference and improving the success rate of network access.
  • that the terminal delays sending the data to the first access network device includes: the terminal delays sending the data to the first access network device for a first period of time , The first time period is greater than zero. In this possible implementation manner, the first time period is greater than 0, thereby avoiding too much overlap between time domain resources occupied by the preamble and time domain resources occupied by data.
  • the first time period is related to the length of the preamble, and the longer the preamble, the longer the first time period.
  • the first time period is longer, then It can better avoid the time domain resources occupied by the preamble and the time domain resources occupied by the data from overlapping too much.
  • the first time period is related to the index of the start symbol of the preamble, and the larger the index of the start symbol of the preamble, the longer the first time period.
  • the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap more.
  • the first The longer the time period the better avoiding the time domain resources occupied by the preamble and the time domain resources occupied by the data from overlapping too much.
  • the length of the preamble is determined according to the format of the preamble. This possible implementation provides a method for determining the length of the preamble.
  • the information used to indicate the format of the preamble is carried in MIB or SIB.
  • This possible implementation provides two methods for carrying information in the preamble format.
  • the first time period is related to a second TA
  • the second TA is for the terminal to send the The TA used in the data.
  • the first time period is longer, It can better avoid the time domain resources occupied by the preamble and the time domain resources occupied by the data from overlapping too much.
  • the second TA is determined according to information used to determine the second TA; wherein the information used to determine the second TA is the value of the second TA, and the The value of the second TA is carried in message 2; or, the information used to determine the second TA is the offset value used to update the second TA.
  • the first time period is related to an uplink transmission timing deviation between the first access network device and the second access network device, and the greater the uplink transmission timing deviation is , The longer the first time period.
  • the greater the deviation of the uplink transmission timing is, the more time domain resources occupied by the preamble and the time domain resources occupied by data overlap.
  • the first time period is longer , It can better avoid the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap too much.
  • the first time period is greater than or equal to the second time period
  • the second time period is: LEN sul_Preamble –[(1000/2 ⁇ )-(1000/(14*2 ⁇ ))*N s_sul -TA Lte -T t_max ], the unit of the second time period is microseconds.
  • the value of the first time period can be such that the time domain resources occupied by the preamble and the time domain resources occupied by the data do not overlap at all.
  • the information used to determine the time domain resource of the data is carried in the MIB or SIB.
  • the first access network device is an access network device in an LTE system
  • the second access network device is an access network device in an NR system.
  • a communication method including: a terminal establishes an RRC connection with a first access network device in a first frequency band; the terminal uses a first TA to send a preamble to a second access network device in a second frequency band ,
  • the network standards of the first access network device and the second access network device are different, there is an overlap between the first frequency band and the second frequency band, and the value of the first TA is 0;
  • the terminal determines not to send the data to the first access network device .
  • the terminal does not send data to the first access network device, thereby avoiding the overlap of the time domain resources occupied by the preamble and the time domain resources occupied by the data. Avoid interference and improve the success rate of network access.
  • the length of the preamble is determined according to the format of the preamble. This possible implementation provides a method for determining the length of the preamble.
  • the information used to indicate the format of the preamble is carried in MIB or SIB.
  • This possible implementation provides two methods for carrying information in the preamble format.
  • the information used to determine the time domain resource of the data is carried in the MIB or SIB.
  • the first access network device is an access network device in an LTE system
  • the second access network device is an access network device in an NR system.
  • a communication method including: a terminal determines whether time domain resources occupied by data to be sent to a first access network device and time domain resources occupied by a preamble to be sent to a second access network device are Overlap; wherein the TA used when the terminal sends the preamble is the first TA with a value of 0, the frequency band for communication between the terminal and the first access network device, and the terminal and the second There is overlap between the frequency bands in which the access network equipment communicates.
  • the terminal establishes an RRC connection with the first access network equipment but does not establish an RRC connection with the second access network equipment.
  • the first access network equipment It is different from the network standard of the second access network device; if so, the terminal delays sending the data to the first access network device, so that the time domain resources occupied by the data and the preamble occupy The overlap between time domain resources becomes less, or the terminal determines not to send the data to the first access network device.
  • the terminal delays sending data to the first access network device, thereby avoiding too much overlap between the time domain resources occupied by the preamble and the time domain resources occupied by the data
  • the terminal does not send data to the first access network device, thereby avoiding overlapping of time domain resources occupied by the preamble and time domain resources occupied by data, thereby avoiding interference and improving the success rate of network access.
  • the method further includes: the terminal receives a message from the first access network device, the message includes information for determining a second TA; the terminal determines to send Whether the time domain resources occupied by the data for the first access network device overlaps with the time domain resources occupied by the preamble to be sent to the second access network device includes: the terminal according to the preamble information and the second TA, Determine whether the time domain resources occupied by the data to be sent to the first access network device and the time domain resources occupied by the preamble to be sent to the second access network device overlap, and the preamble information includes the terminal Sending the start symbol information of the preamble and the length information of the preamble.
  • This possible implementation provides a method for determining whether the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap.
  • the terminal determines the time domain resources occupied by the data to be sent to the first access network device and the time domain resources to be sent to the second access based on the preamble information and the second TA.
  • Whether the time domain resources occupied by the preamble of the network access device overlaps includes: the terminal according to the preamble information, the second TA, and the relationship between the first access network device and the second access network device To determine whether the time domain resources occupied by the data to be sent to the first access network device and the time domain resources occupied by the preamble to be sent to the second access network device overlap.
  • This possible implementation provides yet another method for determining whether the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap.
  • the length of the preamble is determined according to the format of the preamble. This possible implementation provides a method for determining the length of the preamble.
  • the information used to indicate the format of the preamble is carried in MIB or SIB.
  • This possible implementation provides two methods for carrying information in the preamble format.
  • the information used to determine the second TA is the value of the second TA, and the value of the second TA is carried in message 2; or, it is used to determine the second TA.
  • the TA information is the offset value used to update the second TA.
  • the information used to determine the time domain resource of the data is carried in the MIB or SIB.
  • the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap;
  • the first condition is: the time slot to which the time domain resource occupied by the preamble belongs and the time slot to which the time domain resource occupied by the data belongs are time slots with adjacent numbers;
  • the second condition is: LEN sul_Preamble >(1000/2 ⁇ )-(1000/(14*2 ⁇ ))*N s_sul -TA Lte -T t_max , LEN sul_Preamble is the length of the preamble, ⁇ is connected to the terminal and the second connection Corresponding to the sub-carrier interval used when the network access device communicates, N s_sul is the index of the start symbol of the terminal sending the preamble, TA Lte is the second TA, and T t_max is the first access network device And the uplink transmission timing deviation between
  • that the terminal delays sending the data to the first access network device includes: the terminal delays sending the data to the first access network device for a first period of time , The first time period is greater than zero. In this possible implementation manner, the first time period is greater than 0, thereby avoiding too much overlap between time domain resources occupied by the preamble and time domain resources occupied by data.
  • the terminal delays sending the data to the first access network device includes: the terminal delays sending the data to the first access network device for a first period of time , The first time period is greater than or equal to the second time period, and the second time period is: LEN sul_Preamble –[(1000/2 ⁇ )-(1000/(14*2 ⁇ ))*N s_sul -TA Lte -T t_max ], the unit of the second time period is microseconds.
  • the value of the first time period can be such that the time domain resources occupied by the preamble and the time domain resources occupied by the data do not overlap at all.
  • the first access network device is an access network device in an LTE system
  • the second access network device is an access network device in an NR system.
  • a communication method including: a terminal determines whether time domain resources occupied by data to be sent to a first access network device and time domain resources occupied by a preamble to be sent to a second access network device are Overlap; wherein there is an overlap between the frequency band for communication between the terminal and the first access network device and the frequency band for communication between the terminal and the second access network device, and the terminal and the first access network device.
  • the network device establishes an RRC connection but does not establish an RRC connection with the second access network device, and the network standards of the first access network device and the second access network device are different; if so, the terminal determines to 2.
  • the first TA used when the access network device sends the preamble.
  • the first TA enables the time domain resources occupied by the data to be sent to the first access network device and the time domain resources to be sent to the second access network device.
  • the time domain resources occupied by the preamble have less overlap; the terminal sends the preamble to the second access network device according to the first TA.
  • the terminal can use the first TA with a value greater than 0 to send the preamble to the second access network device, thereby avoiding the time domain resources and time domain resources occupied by the preamble.
  • the time domain resources occupied by data overlap too much, thereby avoiding interference and improving the success rate of network access.
  • the method further includes: the terminal receives a message from the first access network device, and the message includes information for determining a second TA; the terminal determines The first TA used when sending the preamble to the second access network device includes: the terminal determines the first TA used when sending the preamble to the second access network device according to the preamble information and the second TA.
  • TA This possible implementation provides a method for determining the first TA.
  • the terminal determining the first TA used when sending the preamble to the second access network device according to the preamble information and the second TA includes: the terminal according to the The preamble information, the second TA, and the uplink transmission timing deviation between the first access network device and the second access network device determine the first TA.
  • This possible implementation provides yet another method for determining the first TA.
  • the length of the preamble is determined according to the format of the preamble. This possible implementation provides a method for determining the length of the preamble.
  • the information used to indicate the format of the preamble is carried in MIB or SIB.
  • This possible implementation provides two methods for carrying information in the preamble format.
  • the information used to determine the second TA is the value of the second TA, and the value of the second TA is carried in message 2; or, it is used to determine the second TA.
  • the TA information is the offset value used to update the second TA.
  • the information used to determine the time domain resource of the data is carried in the MIB or SIB.
  • the method further includes: the terminal receives a third TA from the second access network device, where the third TA is the second access network device according to the preamble
  • the code is the TA calculated by the terminal; the terminal uses a fourth TA to send a message 3 to the second access network device, and the fourth TA is the sum of the first TA and the third TA.
  • the second access network device after the terminal sends the preamble to the second access network device, the second access network device will issue a third TA to the terminal. Because the third TA is measured based on the preamble, the preamble The code is sent based on the first TA.
  • the actual TA between the terminal and the second access network device should be the sum of the first TA and the third TA (that is, the fourth TA). Therefore, by updating the first TA, The terminal can use the correct TA (that is, the fourth TA) to send the message 3 to the second access network device.
  • the first TA is greater than zero. In this possible implementation manner, the first TA is greater than 0, thereby avoiding too much overlap between time domain resources occupied by the preamble and time domain resources occupied by data.
  • the first TA satisfies the following condition: MAX(0, TA Lte- T t_max- DIS Preamble ) ⁇ TA nr_Preamble ⁇ TA Lte ; where TA nr_Preamble is the first TA, MAX To take the maximum value function, TA Lte is the second TA, T t_max is the uplink transmission timing deviation between the first access network device and the second access network device, and the DIS Preamble is sent by the terminal The period of time from the end time of the preamble to the end of the time slot, and the time slot is the time slot to which the end time belongs.
  • the value of the first TA can avoid too much overlap of the time domain resources occupied by the preamble and the time domain resources occupied by the data.
  • the first access network device is an access network device in an LTE system
  • the second access network device is an access network device in an NR system.
  • a communication device including: a processing unit and a communication unit; the processing unit is configured to establish an RRC connection with a first access network device in a first frequency band through the communication unit; When the time domain resources occupied by the data of the network device and the time domain resources occupied by the preamble to be sent to the second access network device overlap, the processing unit is further configured to determine the preamble used when sending the preamble to the second access network device.
  • the first TA, the first TA is greater than 0, and the network standards of the first access network device and the second access network device are different; the processing unit is also configured to use the first TA to access the second through the communication unit in the second frequency band.
  • the network device sends the preamble, and there is an overlap between the first frequency band and the second frequency band.
  • the first TA is related to the length of the preamble, and the longer the preamble, the larger the first TA.
  • the first TA is related to the index of the start symbol of the preamble, and the larger the index of the start symbol of the preamble, the larger the first TA.
  • the length of the preamble is determined according to the format of the preamble.
  • the information used to indicate the format of the preamble is carried in the MIB or SIB.
  • the processing unit is further configured to receive a message from the first access network device through the communication unit, and the message includes information for determining the second TA.
  • the information used to determine the second TA is the value of the second TA, and the value of the second TA is carried in message 2; or, the information used to determine the second TA is used to update the second TA.
  • the offset value of the second TA is the value of the second TA.
  • the first TA is related to the uplink transmission timing deviation between the first access network device and the second access network device, and the greater the uplink transmission timing deviation, the larger the first TA.
  • the first TA satisfies the following conditions: MAX(0,TA Lte -T t_max -DIS Preamble ) ⁇ TA nr_Preamble ⁇ TA Lte ; where TA nr_Preamble is the first TA and MAX is the maximum value Function, TA Lte is the second TA used when the communication device sends data, T t_max is the uplink transmission timing deviation between the first access network device and the second access network device, and DIS Preamble is the end of the communication device sending the preamble When the time reaches the end of the time slot, the time slot is the time slot to which the end time belongs.
  • the processing unit is further configured to receive a third TA from the second access network device through the communication unit, where the third TA is a TA calculated by the second access network device for the communication device according to the preamble;
  • the processing unit is further configured to update the first TA to the fourth TA, and use the fourth TA to send the message 3 to the second access network device through the communication unit, and the fourth TA is the sum of the first TA and the third TA.
  • the information used to determine the time domain resource of the data is carried in the MIB or SIB.
  • the first access network device is an access network device in an LTE system
  • the second access network device is an access network device in an NR system.
  • a communication device including: a processing unit and a communication unit; the processing unit is configured to establish an RRC connection with a first access network device in a first frequency band through the communication unit; the processing unit , Also used to send a preamble to a second access network device through the communication unit using the first TA in the second frequency band, where the network standards of the first access network device and the second access network device are different, There is an overlap between the first frequency band and the second frequency band, and the value of the first TA is 0; the time domain resources occupied by the data to be sent to the first access network device and the preamble When the time domain resources occupied by the codes overlap, the processing unit is further configured to delay sending the data to the first access network device.
  • the processing unit is specifically configured to delay sending the data to the first access network device for a first time period, where the first time period is greater than zero.
  • the first time period is related to the length of the preamble, and the longer the preamble, the longer the first time period.
  • the first time period is related to the index of the start symbol of the preamble, and the larger the index of the start symbol of the preamble, the longer the first time period.
  • the length of the preamble is determined according to the format of the preamble.
  • the information used to indicate the format of the preamble is carried in MIB or SIB.
  • the first time period is related to a second TA
  • the second TA is determined according to information used to determine the second TA; wherein the information used to determine the second TA is the value of the second TA, and the The value of the second TA is carried in message 2; or, the information used to determine the second TA is the offset value used to update the second TA.
  • the first time period is related to an uplink transmission timing deviation between the first access network device and the second access network device, and the greater the uplink transmission timing deviation is , The longer the first time period.
  • the first time period is greater than or equal to the second time period
  • the second time period is: LEN sul_Preamble –[(1000/2 ⁇ )-(1000/(14*2 ⁇ ))*N s_sul -TA Lte -T t_max ], the unit of the second time period is microseconds.
  • the information used to determine the time domain resource of the data is carried in the MIB or SIB.
  • the first access network device is an access network device in an LTE system
  • the second access network device is an access network device in an NR system.
  • a communication device including: a processing unit and a communication unit; the processing unit is configured to establish an RRC connection with a first access network device in a first frequency band through the communication unit; the processing unit , Also used to send a preamble to a second access network device through the communication unit using the first TA in the second frequency band, where the network standards of the first access network device and the second access network device are different, There is an overlap between the first frequency band and the second frequency band, and the value of the first TA is 0; the time domain resources occupied by the data to be sent to the first access network device and the preamble When the time domain resources occupied by the codes overlap, the processing unit is further configured to determine not to send the data to the first access network device.
  • the length of the preamble is determined according to the format of the preamble.
  • the information used to indicate the format of the preamble is carried in MIB or SIB.
  • the information used to determine the time domain resource of the data is carried in the MIB or SIB.
  • the first access network device is an access network device in an LTE system
  • the second access network device is an access network device in an NR system.
  • a communication device in a ninth aspect, has a function of implementing any one of the methods provided in the fourth aspect.
  • This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above-mentioned functions.
  • the communication device can exist in the form of a chip product.
  • a communication device in a tenth aspect, has a function of implementing any one of the methods provided in the fifth aspect.
  • This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above-mentioned functions.
  • the communication device can exist in the form of a chip product.
  • a communication device including a processor.
  • the processor is connected to the memory, and the memory is used to store computer-executable instructions, and the processor executes the computer-executable instructions stored in the memory, so as to implement any one of the methods provided in any one of the first aspect to the fifth aspect.
  • the memory and the processor may be integrated together, or may be independent devices. In the latter case, the memory may be located in the communication device or outside the communication device.
  • the processor includes a logic circuit, and also includes at least one of an input interface and an output interface.
  • the output interface is used to execute the sending action in the corresponding method
  • the input interface is used to execute the receiving action in the corresponding method.
  • the communication device further includes a communication interface and a communication bus, and the processor, the memory, and the communication interface are connected through the communication bus.
  • the communication interface is used to perform the sending and receiving actions in the corresponding method.
  • the communication interface may also be called a transceiver.
  • the communication interface includes at least one of a transmitter and a receiver. In this case, the transmitter is used to perform the sending action in the corresponding method, and the receiver is used to perform the receiving action in the corresponding method.
  • the communication device exists in the form of a chip product.
  • a chip including: a processor and an interface, the processor is coupled to the memory through the interface, and when the processor executes a computer program or instruction in the memory, any of the first to fifth aspects is Any one of the methods provided by one aspect is executed.
  • a communication system including: an access network device and the communication device provided in any one of the sixth aspect to the tenth aspect.
  • a computer-readable storage medium including instructions, which when run on a computer, cause the computer to execute any method provided in any one of the first to fifth aspects.
  • a computer program product containing instructions is provided.
  • the instructions run on a computer, the computer executes any one of the methods provided in any one of the first to fifth aspects.
  • the computing device refers to a device that can be abstracted as a computer system.
  • a computing device that supports wireless communication functions may be referred to as a wireless communication device.
  • the communication device in this application may also be referred to as a wireless communication device.
  • the wireless communication device may be the entire computer of the computing device, or part of the device in the computing device, such as a chip related to wireless communication functions, such as a system chip or a communication chip. Among them, the system chip is also called system-on-chip, or SoC chip.
  • the wireless communication device may be a terminal such as a smart phone, or may be a system chip or a communication chip that can be set in the terminal.
  • the wireless communication device may be a wireless access network device such as a base station, or a related chip that can be set in the wireless access network device, such as an SoC chip or a communication chip.
  • the communication chip may include a radio frequency processing chip and a baseband processing chip.
  • the baseband processing chip is sometimes called a modem.
  • the communication chip can be integrated inside the SoC chip or not integrated with the SoC chip.
  • the baseband processing chip is integrated in the SoC chip, and the radio frequency processing chip is not integrated with the SoC chip.
  • Figure 1 is a flow chart of random access
  • Figure 2 is a schematic diagram of configuring the SUL carrier
  • Figure 3 is a schematic diagram of an NSA
  • Figure 4 is a schematic diagram of avoiding overlap of data sent on an LTE carrier and a SUL carrier
  • FIG. 5 is a schematic diagram of overlapping time domain resources occupied by a preamble and time domain resources occupied by data
  • FIG. 6 is a schematic diagram of avoiding overlapping of time domain resources occupied by preamble and time domain resources occupied by data on the SUL carrier;
  • FIG. 7 is a flowchart of a communication method provided by an embodiment of this application.
  • FIG. 8 is a schematic diagram of a second TA and time domain resources occupied by a preamble and time domain resources occupied by data according to an embodiment of this application;
  • FIG. 9 is a schematic diagram showing that time domain resources occupied by preamble and time domain resources occupied by data do not overlap according to an embodiment of the application.
  • FIG. 10 is a flowchart of a communication method provided by an embodiment of this application.
  • FIG. 11 is a flowchart of a communication method provided by an embodiment of this application.
  • FIG. 12 is a schematic diagram of a relationship between various parameters used to determine a first time period provided by an embodiment of this application.
  • FIG. 13 is another schematic diagram of the relationship between various parameters used to determine the first time period provided by an embodiment of this application.
  • FIG. 14 is a flowchart of a communication method provided by an embodiment of this application.
  • 15 is a schematic diagram of the composition of a communication device provided by an embodiment of this application.
  • FIG. 16 and FIG. 17 are respectively schematic diagrams of the hardware structure of a communication device according to an embodiment of the application.
  • FIG. 18 is a schematic diagram of the hardware structure of a terminal provided by an embodiment of the application.
  • words such as “first” and “second” are used to distinguish the same items or similar items that have substantially the same function and effect.
  • the first access network device and the second access network device are only used to distinguish different access network devices.
  • words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • the time slot is a basic unit of time domain resource allocation.
  • a normal cyclic prefix one slot includes 14 orthogonal frequency division multiplexing (OFDM) symbols (hereinafter referred to as symbols).
  • OFDM orthogonal frequency division multiplexing
  • 1 slot contains 12 symbols.
  • one time slot includes 14 symbols.
  • the 14 symbols are numbered in order from smallest to largest, with the smallest number being 0 and the largest number being 13.
  • the symbol whose index (ie, the number) is i is marked as symbol i (i is an integer greater than or equal to 0 and less than or equal to 13), and a time slot includes symbols 0 to 13.
  • the time slot whose index (ie, the number) is j is denoted as time slot j (j is an integer greater than or equal to 0).
  • An important feature of uplink transmission is that the uplink transmissions of different terminals from the same cell do not interfere with each other.
  • access network equipment In order to avoid intra-cell interference, access network equipment requires signals from different terminals in the same subframe but different frequency domain resources (for example, different resource blocks (RB)) to reach the access network equipment.
  • the time is basically aligned.
  • the access network device receives the uplink data sent by the terminal within the CP range, it can decode the uplink data correctly. Therefore, uplink synchronization requires that the signals from different terminals in the same subframe arrive at the access network device.
  • CP resource blocks
  • the mechanism of Uplink Timing Advance (Uplink Timing Advance) is proposed.
  • the TA is essentially a negative offset (negative offset) between the start time of receiving the downlink subframe and the time of transmitting the uplink subframe.
  • the access network equipment can control the time when the uplink signals from different terminals reach the access network equipment by appropriately controlling the offset of each terminal. For terminals far away from the access network equipment, due to greater transmission delay, it is necessary to send uplink data earlier than the terminals closer to the access network equipment. That is to say, the TA corresponding to the terminal farther from the access network device is larger than the TA corresponding to the terminal closer to the access network device.
  • the TAs involved in this application are all uplink TAs, that is, the TA used when the terminal sends an uplink signal.
  • the random access procedure is used for the terminal to establish a connection with the cell and obtain uplink synchronization.
  • the terminal sends a message 1 (Msg1) to the access network device, where Msg1 includes a preamble.
  • the preamble may also be referred to as a random access preamble, a physical random access channel (PRACH) preamble (PRACH preamble), a random access preamble sequence, a preamble sequence, and so on.
  • PRACH physical random access channel
  • Msg1 can tell the access network device that there is a random access request, and at the same time enables the access network device to estimate the transmission delay between it and the terminal and determine the TA based on this.
  • Msg1 can be carried on PRACH.
  • the PRACH resource and preamble are selected by the terminal.
  • Different terminals may select the same PRACH resource and the same preamble at the same time, resulting in conflicts.
  • a conflict resolution mechanism is needed. (That is, step 103 and step 104) to solve this problem.
  • the terminal Based on non-competitive random access, the terminal already has a unique identifier in the accessed cell.
  • Cell-radio network temporary identifier (C-RNTI) and the PRACH resource and preamble are determined by the access network equipment It is specified to ensure that it will not conflict with other terminals, and there is no need for a conflict resolution mechanism (that is, step 103 and step 104 are not required).
  • the access network device sends a message 2 (Msg2) to the terminal.
  • Msg2 message 2
  • Msg2 may be a random access response (random access response, RAR).
  • Msg2 may include TA, which is a TA calculated by the access network device for the terminal according to Msg1.
  • the terminal sends a message 3 (Msg3) to the access network device.
  • Msg3 message 3
  • the terminal may use the TA in Msg2 to send Msg3 to the access network device.
  • Msg3 needs to include an important piece of information: the contention resolution identity of the terminal, which will be used for conflict resolution in step 104.
  • the access network device sends a message 4 (Msg4) to the terminal, indicating the result of the random access competition of the terminal.
  • Msg4 message 4
  • the access network device will carry the conflict resolution identifier of the terminal in the Msg4 to specify the terminal that succeeds in the conflict resolution, and other terminals that have not succeeded in the conflict resolution will re-initiate random access.
  • the access network device may periodically calculate the TA offset value for the terminal according to the uplink message sent by the terminal, and the terminal determines the TA to be used according to the most recently used TA and the offset value.
  • the preamble format includes a CP part and a data part.
  • a preamble format corresponds to 64 preambles, and the indexes of the 64 preambles are 0 to 63 in sequence.
  • One preamble can correspond to one or more transmission symbols, and the terminal can transmit the preamble on the transmission symbol corresponding to the preamble.
  • the 3rd Generation Partnership Project (The 3rd Generation Partnership Project, 3GPP) Technical Specification (TS) 38.211 V15.6.0 shows the preamble format, as shown in Table 1 (corresponding to the 3GPP TS 38.211 V15.6.0 Table 6.3.3.1-1) and Table 2 (corresponding to Table 6.3.3.1-2 in 3GPP TS 38.211 V15.6.0).
  • L RA with a value of 839 in the table refers to a long preamble format
  • L RA with a value of 139 refers to a short preamble format.
  • ⁇ f RA represents the subcarrier spacing (SCS) corresponding to the preamble format.
  • N u preamble format the number of symbols occupied ⁇ (2048 + 144) ⁇ .
  • N u preamble format the number of symbols occupied ⁇ (2048 ⁇ 2 - ⁇ +144) ⁇ .
  • ⁇ means "multiply by”. Since this application only relates to the preamble format of no more than 14 symbols, if the length of the preamble format is closest to 14 symbols, the length of the preamble format of format 0, format 3 and format B4 are all 12 Symbol, the closest to 14 symbols. That is to say, the preamble format corresponding to the preamble sent by the terminal in the embodiment of the present application is up to 12 symbols.
  • uplink carriers and downlink carriers in the same frequency band need to be bound and paired for use, that is, one uplink carrier corresponds to one downlink carrier, and the uplink and downlink are coupled.
  • the uplink coverage in the NR band network may be smaller than the downlink coverage.
  • the uplink coverage of 3.5G time-division duplex (TDD) is 10dB to 15dB lower than the downlink coverage. Therefore, NR breaks the design of uplink and downlink coupling in the traditional communication system, and introduces the design of uplink and downlink decoupling. Through uplink and downlink decoupling, NR supports the configuration of multiple uplink carriers in a cell.
  • the carrier of the NR system can be called a normal uplink (NUL) carrier, and the added uplink carrier can be called a SUL carrier.
  • NUL normal uplink
  • SUL carrier can be flexibly configured. It can be a carrier in the existing LTE system or a separate uplink carrier.
  • Figure 2 shows an example of a SUL carrier with a 1.8GHz LTE carrier configured as a 3.5GHz NR carrier.
  • the frequency of the 1.8GHz SUL carrier is lower than that of 3.5GHz, and the propagation loss (also The so-called path loss) is also smaller, which can effectively improve the NR uplink coverage, and uses the existing LTE carrier, which saves the operator's overhead.
  • the terminal can access two access network devices with different network standards, for example, eNB and gNB.
  • the two access network devices can Ideal or non-ideal backhaul.
  • the LTE carrier that is, the carrier used when the terminal communicates with the eNB
  • the SUL carrier can share the LTE low frequency (for example, the 1.8GHz carrier), that is, the LTE carrier and the SUL carrier.
  • the SUL carrier belongs to the same carrier with the same bandwidth, and the terminal shares the carrier by time division multiplexing. For example, in a period of time, the terminal uses the carrier to send signals to the eNB, and in another period of time, uses the carrier to send signals to the gNB.
  • the uplink transmission timing difference between LTE and NR is limited to 5.21 microseconds (us) , That is, the uplink transmission timing deviation of the LTE carrier and the SUL carrier of the same carrier and the same bandwidth is within 5.21us.
  • the existing protocol stipulates that in order to avoid the overlap between the signal sent by the LTE carrier and the signal sent by the SUL carrier due to the uplink transmission timing deviation, the signal sent to the eNB should be sent to the eNB during normal transmission of services.
  • the access network device schedules one symbol less at the above-mentioned time switching point (that is, the symbol 13 and the symbol 0 on the SUL carrier are not scheduled).
  • the terminal When the LTE carrier and the SUL carrier have the same carrier and the same bandwidth, if the terminal first accesses the LTE base station (for example, eNB), the terminal needs to use a TA when sending data to the LTE base station on this carrier. At this time, if the terminal needs to connect Enter the NR base station (for example, gNB), you need to send the preamble to the NR base station, and the TA used by default when sending the preamble is 0.
  • the PRACH resource for sending the preamble can be configured to be sent on the NUL carrier and/or the SUL carrier. The terminal can determine on which carrier to send the preamble through the signal quality of the carrier.
  • the access network equipment can specify the carrier for transmitting the preamble (for example, through a cell (for example, PDCCH) in the physical downlink control channel (PDCCH) PDCCH order) or radio resource control (radio resource control, RRC) reconfiguration message (dedicated RRC RACH configuration) is assigned to the terminal).
  • a cell for example, PDCCH
  • PDCCH physical downlink control channel
  • RRC radio resource control
  • the terminal sends the preamble on the SUL carrier (whether it is determined by the terminal or specified by the access network equipment), it may cause the terminal to send the preamble to the NR base station and the time domain occupied by the data to the LTE base station. Resources overlap, causing preamble and data to interfere with each other.
  • the length of the preamble can reach 12 symbols.
  • the TA used when sending data is 4 symbols. If the terminal sends a preamble to the NR base station in time slot N+1, and the preamble is 12 symbols, And the terminal needs to send data at symbol 0 of time slot N+2, then the time domain resources occupied by sending the preamble to the NR base station and the time domain resources occupied by sending data to the LTE base station overlap (the overlapping part is the SUL carrier Symbol 10 and symbol 11 in time slot N+1, or symbol 0 and symbol 1 in time slot N+2 on the LTE carrier), thereby causing interference between preamble and data.
  • the SUL carrier can be allowed to evade.
  • the preamble on the symbol 9 to the symbol 11 in the time slot N+1 on the SUL carrier is no longer sent Code, this will lead to incomplete transmission of the preamble, and performance loss in the signaling channel.
  • Both the first and second embodiments can be applied to a communication system that includes a first access network device and a second access network device, and the network standards of the first access network device and the second access network device.
  • the difference is that there is overlap between the frequency band for communication between the terminal and the first access network device (denoted as the first frequency band) and the frequency band for communication between the terminal and the second access network equipment (denoted as the second frequency band) (partial overlap and full overlap are both) Yes), for example, the terminal communicates with the first access network device and the second access network device through the same uplink carrier (denoted as the first carrier), that is, the terminal is communicating with the first access network device and the second access network device.
  • the device shares the first carrier when communicating.
  • the first access network device is an LTE base station
  • the second access network device is an NR base station
  • the first access network device is an NR base station
  • the second access network device is an LTE base station.
  • the first carrier when the terminal communicates with the LTE base station through the first carrier, the first carrier may be referred to as the LTE carrier, and when the terminal communicates with the NR base station through the first carrier, the first carrier may be referred to as the SUL carrier.
  • the terminal accesses the first access network device through the random access procedure (that is, establishes an RRC connection with the first access network device) but does not access the second access network device.
  • the terminal sends the preamble to the second access network device in advance, so that the time domain resources occupied by the preamble and the time domain resources occupied when sending data to the first access network device are less overlapped.
  • the terminal delays sending data to the first access network device, so that the time domain resources occupied when sending the preamble to the second access network device and the time domain resources occupied by the data overlap less.
  • Embodiment 1 provides a communication method, as shown in FIG. 7, including:
  • the terminal establishes an RRC connection with the first access network device in the first frequency band.
  • the terminal may establish an RRC connection with the first access network device in the first frequency band through a random access procedure.
  • the terminal determines to send to the second access network device The first TA used in the preamble.
  • the first TA is greater than 0, so that the overlap between the time domain resources occupied by the data to be sent to the first access network device and the time domain resources occupied by the preamble to be sent to the second access network device can be changed. few.
  • the terminal uses the first TA to send the preamble to the second access network device in the second frequency band.
  • the second access network device receives the preamble, and the actions after receiving the preamble can refer to the existing process, and will not be repeated.
  • the first TA is related to any one or more of the following parameters 1 to 4.
  • Parameter 1 The length of the preamble. Specifically, the longer the preamble, the larger the first TA. When other parameters are fixed, since the longer the preamble, the more time domain resources occupied by the preamble and the time domain resources occupied by the data overlap. At this time, if the first TA is larger, the preamble occupation can be better avoided The time domain resources and the time domain resources occupied by the data overlap too much.
  • Parameter 2 The index of the start symbol of the preamble. Specifically, the larger the index of the start symbol of the preamble, the larger the first TA. In the case of fixed other parameters, since the index of the start symbol of the preamble is larger, the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap more. At this time, if the first TA is larger, it can be changed. It is better to avoid too much overlap between the time domain resources occupied by the preamble and the time domain resources occupied by the data.
  • the second TA, the second TA is the TA used when the terminal sends data. Specifically, the larger the second TA, the larger the first TA.
  • the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap more. At this time, if the first TA is larger, the preamble can be better avoided The time domain resources occupied and the time domain resources occupied by data overlap too much.
  • Parameter 4 Uplink transmission timing deviation between the first access network device and the second access network device. Specifically, the greater the deviation of the uplink transmission timing, the greater the first TA. When other parameters are fixed, because the greater the deviation of the uplink transmission timing, the more time domain resources occupied by the preamble and the time domain resources occupied by the data overlap. At this time, if the first TA is larger, the preamble can be better avoided The time domain resources occupied by the code and the time domain resources occupied by the data overlap too much.
  • the terminal may use the first frequency band with a value greater than 0.
  • a TA sends the preamble to the second access network device, thereby avoiding too much overlap between the time domain resources occupied by the preamble and the time domain resources occupied by the data, thereby avoiding interference and improving the success rate of network access.
  • the method further includes:
  • the terminal determines whether the time domain resources occupied by the data to be sent to the first access network device and the time domain resources occupied by the preamble to be sent to the second access network device overlap.
  • step 701A when the terminal knows the preamble information, it can determine which symbols to send the preamble (that is, determine the time domain resources occupied by the preamble).
  • the preamble information includes the start symbol information of the preamble sent by the terminal and the length information of the preamble. Among them, the length of the preamble can be determined according to the format of the preamble. The start symbol information of the preamble can be determined according to the preamble that the terminal determines to send.
  • the second access network device may broadcast the preamble format to the terminal through a master information block (MIB) or a system information block (SIB), and after the terminal determines the preamble format, the preamble A preamble is randomly selected from the preamble corresponding to the format, and a nearby transmission symbol is selected among the transmission symbols corresponding to the preamble to transmit the preamble.
  • the terminal may determine that the nearest transmitted symbol is the start symbol of the preamble, and determine the length of the preamble format as the length of the preamble.
  • the terminal may determine which symbols of a time slot to send data on according to the parameters related to the time domain resource for sending data carried in the MIB or SIB broadcast by the first access network device. That is, the information used to determine the time domain resource of the data can be carried in the MIB or SIB.
  • step 701A determines the first TA used when sending the preamble to the second access network device. If the judgment result of step 701A is no, the terminal can send the preamble and data normally. In FIG. 7, the judgment result of step 701A is taken as an example for drawing.
  • the method further includes: the first access network device sends a message to the terminal, and the message includes information for determining the second TA.
  • the terminal receives the message from the first access network device.
  • step 701A when step 701A is specifically implemented, it may include:
  • the terminal determines the first TA used when sending the preamble to the second access network device according to the preamble information and the second TA.
  • the information used to determine the second TA is the value of the second TA, and the value of the second TA is carried in Msg2.
  • the terminal may directly determine the second TA.
  • the information used to determine the second TA is an offset value used to update the second TA. In this case, the terminal determines the second TA according to the offset value.
  • the terminal there may be two modules (denoted as the first module and the second module) inside the terminal, one module (assumed as the first module) is used to communicate with the first access network device, and the other One (assumed to be the second module) is used to communicate with the second access network device.
  • the two modules do not exchange information with each other.
  • the second module may request the information of the second TA from the first module, and the first module sends the information of the second TA to the second module so that the second module can determine the first TA.
  • step 11) includes in specific implementation:
  • the terminal determines the first TA according to the preamble information, the second TA, and the uplink transmission timing deviation between the first access network device and the second access network device.
  • the first TA may be greater than 0.
  • the first TA as TA nr_Preamble , and optionally, TA nr_Preamble ⁇ TA Lte .
  • the first TA satisfies the following condition: MAX(0, TA Lte- T t_max- DIS Preamble ) ⁇ TA nr_Preamble ⁇ TA Lte .
  • TA nr_Preamble is the first TA
  • MAX is the maximum value function
  • TA Lte is the second TA
  • T t_max is the uplink transmission timing deviation between the first access network device and the second access network device
  • DIS Preamble is A period of time from the end time of the terminal sending the preamble to the end of the time slot
  • the time slot is the time slot to which the end time belongs.
  • the end time of sending the preamble is recorded as x, in order to ensure that the preamble and data occupy Time domain resources do not overlap.
  • T t_max it is necessary to ensure that xT t_max is before y, that is, xT t_max ⁇ y.
  • T slot the length of a slot
  • x T slot -DIS Preamble -TA nr_Preamble
  • y T slot -TA Lte , that is, T slot -DIS Preamble -TA nr_Preamble -T t_max ⁇ T slot -TA Lte
  • TA Lte -DIS Preamble -T t_max T slot -TA Lte
  • TA nr_Preamble is generally less than or equal to TA Lte
  • -TA Lte ⁇ -TA nr_Preamble that is, TA nr_Preamble ⁇ TA Lte .
  • TA Lte -DIS Preamble -T t_max may be less than 0, and TA nr_Preamble is greater than 0, therefore, TA nr_Preamble should meet the following conditions: MAX(0,TA Lte -T t_max -DIS Preamble ) ⁇ TA nr_Preamble ⁇ TA Lte .
  • T 2*OFDM -T t_max ⁇ TA nr_Preamble ⁇ T 4*OFDM for example, when TA is 3 symbols, the time domain resources occupied by the preamble and data will not overlap.
  • T 2*OFDM refers to the length of 2 symbols
  • T 4*OFDM refers to the length of 4 symbols.
  • the method further includes:
  • the terminal receives the third TA from the second access network device, and the third TA is the TA calculated by the second access network device for the terminal according to the preamble.
  • the terminal updates the first TA to the fourth TA, and uses the fourth TA to send message 3 to the second access network device, where the fourth TA is the sum of the first TA and the third TA.
  • the second access network device will issue a third TA (which can be recorded as TA nr ) to the terminal, because the third TA is based on the preamble
  • the preamble is sent based on the first TA. Therefore, the actual TA between the terminal and the second access network device should be the sum of the first TA and the third TA (that is, the fourth TA).
  • the four TA sends message 3 to the second access network device.
  • the process includes:
  • the first module accesses a first access network device, and the second module initiates a random access procedure to the second access network device.
  • the second module determines the leading information.
  • the second module sends a request message to the first module, where the request message is used to request information about the second TA.
  • the first module receives the request message from the second module, and sends the information of the second TA to the second module according to the request message.
  • the second module receives the information of the second TA, and determines the first TA according to the second TA and the preamble information.
  • the second module sends the preamble to the second access network device according to the first TA.
  • the second module receives the information of the third TA from the second access network device.
  • the second module calculates a fourth TA according to the first TA and the third TA, and sends a message 3 to the second access network device according to the fourth TA.
  • the second embodiment provides a communication method, as shown in FIG. 11, including:
  • the terminal establishes an RRC connection with the first access network device in the first frequency band.
  • the terminal may establish an RRC connection with the first access network device in the first frequency band through a random access procedure.
  • the terminal uses the first TA to send the preamble to the second access network device in the second frequency band, and the value of the first TA is 0.
  • the second access network device receives the preamble, and the actions after receiving the preamble can refer to the existing process, and will not be repeated.
  • the TA used when the terminal sends the preamble is the first TA with a value of 0. That is, the terminal normally sends the preamble to the second access network device.
  • the terminal delays sending the data to the first access network device.
  • the terminal determines that the time domain resources occupied by the preamble sent to the second access network device and the time domain resources to be sent to the first access network device
  • the terminal delays sending data to the first access network device, thereby avoiding too much overlap between the time domain resources occupied by the preamble and the time domain resources occupied by the data, thereby avoiding interference and improving Network access success rate.
  • the method further includes:
  • the terminal determines whether the time domain resources occupied by the data to be sent to the first access network device and the time domain resources occupied by the preamble to be sent to the second access network device overlap.
  • the preamble information includes the start symbol information of the preamble sent by the terminal and the length information of the preamble. Among them, the length of the preamble can be determined according to the format of the preamble. The start symbol information of the preamble can be determined according to the preamble that the terminal determines to send.
  • the second access network device may broadcast the preamble format to the terminal through MIB or SIB. After the terminal determines the preamble format, it randomly selects a preamble from the preamble corresponding to the preamble format, and selects the preamble corresponding to the preamble format. Select a nearby transmit symbol among the transmit symbols to transmit the preamble. The terminal may determine that the nearest transmitted symbol is the start symbol of the preamble, and determine the length of the preamble format as the length of the preamble.
  • the terminal may determine which symbols of a time slot to send data on according to the parameters related to the time domain resource for sending data carried in the MIB or SIB broadcast by the first access network device. That is, the information used to determine the time domain resource of the data can be carried in the MIB or SIB.
  • step 1102A If the judgment result of step 1102A is yes, the terminal delays sending data to the first access network device, and if the judgment result of step 1102A is no, the terminal sends data normally.
  • the first module there may be two modules (denoted as the first module and the second module) inside the terminal, one module (assumed as the first module) is used to communicate with the first access network device, and the other One (assumed to be the second module) is used to communicate with the second access network device.
  • the two modules do not exchange information with each other.
  • the second module may send the preamble information to the first module so that the first module can determine whether the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap, and then determine whether to delay sending the data.
  • the method further includes: the first access network device sends a message to the terminal, and the message includes information for determining the second TA.
  • the terminal receives the message from the first access network device.
  • step 1102A includes:
  • the terminal determines whether the time domain resources occupied by the data to be sent to the first access network device and the time domain resources occupied by the preamble to be sent to the second access network device overlap according to the preamble information and the second TA.
  • the second TA is the TA used when the terminal sends data.
  • the value range of TA may be 0 ms to 2 ms.
  • the information used to determine the second TA is the value of the second TA, and the value of the second TA is carried in Msg2.
  • the terminal may directly determine the second TA.
  • the information used to determine the second TA is an offset value used to update the second TA. In this case, the terminal determines the second TA according to the offset value.
  • step 11) includes in specific implementation:
  • the terminal determines the time domain resources occupied by the data to be sent to the first access network device according to the preamble information, the second TA, and the uplink transmission timing deviation between the first access network device and the second access network device Whether it overlaps with the time domain resources occupied by the preamble to be sent to the second access network device.
  • the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap.
  • the first condition is that the time slot to which the time domain resource occupied by the preamble belongs and the time slot to which the time domain resource occupied by the data belongs are time slots with adjacent numbers.
  • the time slot to which the time domain resource occupied by the preamble belongs is time slot N
  • the time slot to which the time domain resource occupied by data belongs is time slot N+1.
  • the second condition is: LEN sul_Preamble >(1000/2 ⁇ )-(1000/(14*2 ⁇ ))*N s_sul -TA Lte -T t_max .
  • LEN sul_Preamble is the length of the preamble
  • ⁇ corresponds to the SCS used when the terminal communicates with the second access network device
  • N s_sul is the index of the starting symbol for the terminal to send the preamble
  • TA Lte is the second TA
  • T t_max It is the uplink transmission timing deviation between the first access network device and the second access network device.
  • delaying the terminal from sending data to the first access network device includes: delaying the terminal from sending data to the first access network device for a first period of time, and the first period of time is greater than zero.
  • This optional method can reduce the overlap between the time domain resources occupied by the data and the preamble.
  • the first time period is related to any one or more of the following parameters 1 to 4.
  • Parameter 1 The length of the preamble. Specifically, the longer the preamble, the longer the first time period. When other parameters are fixed, since the longer the preamble, the more time domain resources occupied by the preamble and the time domain resources occupied by the data overlap. At this time, if the first TA is larger, the preamble occupation can be better avoided The time domain resources and the time domain resources occupied by the data overlap too much.
  • Parameter 2 The index of the start symbol of the preamble. Specifically, the larger the index of the start symbol of the preamble, the longer the first time period. In the case of fixed other parameters, since the index of the start symbol of the preamble is larger, the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap more. At this time, if the first TA is larger, it can be changed. It is better to avoid too much overlap between the time domain resources occupied by the preamble and the time domain resources occupied by the data.
  • Parameter 3 The second TA. Specifically, the larger the second TA, the longer the first time period.
  • the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap more. At this time, if the first TA is larger, the preamble can be better avoided The time domain resources occupied and the time domain resources occupied by data overlap too much.
  • Parameter 4 Uplink transmission timing deviation between the first access network device and the second access network device. Specifically, the greater the deviation of the uplink transmission timing, the longer the first time period. When other parameters are fixed, because the greater the deviation of the uplink transmission timing, the more time domain resources occupied by the preamble and the time domain resources occupied by the data overlap. At this time, if the first TA is larger, the preamble can be better avoided The time domain resources occupied by the code and the time domain resources occupied by the data overlap too much.
  • the first time period is greater than or equal to the second time period, and the second time period is: LEN sul_Preamble –[(1000/2 ⁇ )- (1000/(14*2 ⁇ ))*N s_sul -TA Lte -T t_max ], the unit of the second time period is us.
  • the terminal Delay ⁇ LEN sul_Preamble –[(1000/2 ⁇ )-(1000/(14*2 ⁇ ))*N s_sul -TA Lte -T t_max ] ⁇ us when the first access network device sends data.
  • the process includes:
  • the first module accesses a first access network device, and the second module initiates a random access procedure to the second access network device.
  • the second module determines the leading information.
  • the second module sends the preamble information to the first module.
  • the first module receives the preamble information, and determines whether the time domain resources occupied by the data and the preamble overlap according to the preamble information and the second TA.
  • step 1405 If yes, go to step 1405, if not, go to step 1406.
  • the first module delays sending data to the first access network device, or the first module determines not to send data to the first access network device.
  • the first module normally sends data to the first access network device.
  • an alternative implementation of “the terminal delays sending data to the first access network device” is “the terminal determines not to send data to the first access network device". In this case, if there is overlap between the first frequency band and the second frequency band, if the time domain resources occupied by the preamble and the time domain resources occupied by the data overlap, the terminal does not send data to the first access network device, This avoids overlapping of time domain resources occupied by the preamble and time domain resources occupied by data, thereby avoiding interference and improving the success rate of network access.
  • the NR system and the LTE system are used as examples above in this application to exemplify the methods provided in the embodiments of this application, but it should be noted that the methods provided in the embodiments of this application can be applied to other systems with similar scenarios.
  • the NR system and the future evolution system, or the LTE system and the future evolution system are replaced with access network devices in the corresponding system, and other parameters (for example, uplink transmission timing deviation) can be replaced with values in the corresponding system.
  • the access network device is used as a base station as an example for illustrative description.
  • the access network device may also be a transmission reception point (TRP), medium Relay node (RN), integrated access and backhaul (IAB) node, access point (AP), various forms of control nodes (for example, network controller, wireless control) Devices (for example, a wireless controller in a cloud radio access network (CRAN) scenario), a roadside unit (RSU), etc.
  • TRP transmission reception point
  • RN medium Relay node
  • IAB integrated access and backhaul
  • AP access point
  • various forms of control nodes for example, network controller, wireless control
  • Devices for example, a wireless controller in a cloud radio access network (CRAN) scenario
  • RSU roadside unit
  • the terminal in the embodiments of the present application may also be referred to as user equipment (UE), terminal equipment, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile equipment, user terminal, wireless communication Equipment, user agent, or user device.
  • the terminal can be a vehicle to everything (V2X) device, for example, smart car (smart car or intelligent car), digital car (digital car), unmanned car (unmanned car or driverless car or pilotless car or automobile), automatic Automobile (self-driving car or autonomous car), pure electric vehicle (pure EV or battery EV), hybrid electric vehicle (hybrid electric vehicle, HEV), extended-range electric vehicle (range extended EV, REEV), plug-in hybrid electric vehicle Automobile (plug-in HEV, PHEV), new energy vehicle (new energy vehicle), etc.
  • V2X vehicle to everything
  • the terminal may also be a device to device (D2D) device, for example, an electric meter, a water meter, and so on.
  • the terminal can also be a mobile station (MS), subscriber unit (subscriber unit), drone, Internet of things (IoT) equipment, station (ST) in WLAN, and cellular phone (cellular phone). ), smart phone (smart phone), cordless phone, wireless data card, tablet computer, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital processing (personal) Digital assistant (PDA) equipment, laptop computer, machine type communication (MTC) terminal, handheld device with wireless communication function, computing device or other processing equipment connected to wireless modem, vehicle-mounted equipment , Wearable devices (also known as wearable smart devices).
  • the terminal may also be a terminal in the next generation communication system.
  • the embodiment of the present application may divide the terminal into functional units according to the foregoing method examples.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 15 shows a schematic diagram of a possible structure of the communication device (denoted as the communication device 150) involved in the foregoing embodiment.
  • the communication device 150 includes a processing unit 1501 and a communication unit 1502.
  • a storage unit 1503 is further included.
  • the communication device 150 may be used to illustrate the structure of the terminal in the foregoing embodiment.
  • the processing unit 1501 is used to control and manage the actions of the terminal.
  • the processing unit 1501 is used to execute the steps in FIG. 7, the steps in FIG. 10, the steps in FIG. 11, the steps in FIG. 14, and/ Or actions performed by the terminal in other processes described in the embodiments of this application.
  • the processing unit 1501 may communicate with other network entities through the communication unit 1502, for example, communicate with the second access network device in FIG. 7.
  • the storage unit 1503 is used to store the program code and data of the terminal.
  • the communication device 150 may be a device, a chip or a chip system.
  • the processing unit 1501 may be a processor; the communication unit 1502 may be a communication interface, a transceiver, or an input interface and/or an output interface.
  • the transceiver may be a transceiver circuit.
  • the input interface may be an input circuit, and the output interface may be an output circuit.
  • the communication unit 1502 may be a communication interface, input interface and/or output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
  • the processing unit 1501 may be a processor, a processing circuit, a logic circuit, or the like.
  • the integrated unit in FIG. 15 is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the medium includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • Storage media for storing computer software products include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks, etc., which can store program codes Medium.
  • the embodiment of the present application also provides a schematic diagram of the hardware structure of a communication device.
  • the communication device includes a processor 1601, and optionally, a memory 1602 connected to the processor 1601.
  • the processor 1601 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.
  • the processor 1601 may also include multiple CPUs, and the processor 1601 may be a single-CPU processor or a multi-CPU processor.
  • the processor here may refer to one or more devices, circuits, or processing cores for processing data (for example, computer program instructions).
  • the memory 1602 may be ROM or other types of static storage devices that can store static information and instructions, RAM, or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory).
  • read-only memory EEPROM
  • compact disc read-only memory, CD-ROM
  • optical disc storage including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.
  • magnetic disks A storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, and the embodiment of the present application does not impose any limitation on this.
  • the memory 1602 may exist independently (in this case, the processor may be located outside the communication device or in the communication device), or may be integrated with the processor 1601. Wherein, the memory 1602 may contain computer program code.
  • the processor 1601 is configured to execute the computer program code stored in the memory 1602, so as to implement the method provided in the embodiment of the present application.
  • the communication device further includes a transceiver 1603.
  • the processor 1601, the memory 1602, and the transceiver 1603 are connected by a bus.
  • the transceiver 1603 is used to communicate with other devices or a communication network.
  • the transceiver 1603 may include a transmitter and a receiver.
  • the device used to implement the receiving function in the transceiver 1603 can be regarded as a receiver, and the receiver is used to perform the receiving steps in the embodiment of the present application.
  • the device used for implementing the sending function in the transceiver 1603 can be regarded as a transmitter, and the transmitter is used to perform the sending steps in the embodiment of the present application.
  • the schematic structural diagram shown in FIG. 16 may be used to illustrate the structure of the terminal involved in the foregoing embodiment.
  • the processor 1601 is used to control and manage the actions of the terminal.
  • the processor 1601 is used to execute the steps in FIG. 7, the steps in FIG. 10, the steps in FIG. 11, the steps in FIG. 14, and/ Or actions performed by the terminal in other processes described in the embodiments of this application.
  • the processor 1601 may communicate with other network entities through the transceiver 1603, for example, communicate with the second access network device in FIG. 7.
  • the memory 1602 is used to store program codes and data of the terminal.
  • the processor 1601 includes a logic circuit and at least one of an input interface and an output interface.
  • the output interface is used to execute the sending action in the corresponding method
  • the input interface is used to execute the receiving action in the corresponding method.
  • FIG. 17 The schematic structural diagram shown in FIG. 17 may be used to illustrate the structure of the terminal involved in the foregoing embodiment.
  • the processor 1601 is used to control and manage the actions of the terminal.
  • the processor 1601 is used to execute the steps in FIG. 7, the steps in FIG. 10, the steps in FIG. 11, the steps in FIG. 14, and/ Or actions performed by the terminal in other processes described in the embodiments of this application.
  • the processor 1601 may communicate with other network entities through at least one of the input interface and the output interface, for example, communicate with the second access network device in FIG. 7.
  • the memory 1602 is used to store program codes and data of the terminal.
  • each step in the method provided in this embodiment can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the embodiment of the present application also provides a schematic diagram of the hardware structure of a terminal (denoted as terminal 180). For details, refer to FIG. 18 respectively.
  • FIG. 18 is a schematic diagram of the hardware structure of the terminal 180. For ease of description, FIG. 18 only shows the main components of the terminal. As shown in FIG. 18, the terminal 180 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal, execute the software program, and process the data of the software program. For example, it is used to control the terminal to execute the steps in Figure 7, the steps in Figure 10, Some or all of the actions performed by the terminal in the steps in FIG. 11, the steps in FIG. 14, and other processes described in the embodiments of the present application.
  • the memory is mainly used to store software programs and data.
  • the control circuit also referred to as a radio frequency circuit
  • the control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the memory, interpret and execute the instructions of the software program, and process the data of the software program.
  • data for example, preamble
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the control circuit in the control circuit.
  • the control circuit performs radio frequency processing on the baseband signal and then passes the radio frequency signal through the antenna Send out in the form of electromagnetic waves.
  • the control circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 18 only shows a memory and a processor. In an actual terminal, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal and execute software. Programs, which process the data of software programs.
  • the processor in FIG. 18 integrates the functions of a baseband processor and a central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, and are interconnected by technologies such as a bus.
  • the terminal may include multiple baseband processors to adapt to different network standards, the terminal may include multiple central processors to enhance its processing capabilities, and various components of the terminal may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and the communication data can be built in the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the embodiment of the present application also provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute any of the above-mentioned methods.
  • the embodiments of the present application also provide a computer program product containing instructions, which when run on a computer, cause the computer to execute any of the above-mentioned methods.
  • An embodiment of the present application also provides a communication system, including: an access network device and the terminal in the foregoing embodiment.
  • the access network equipment includes the foregoing first access network equipment and/or second access network equipment.
  • the embodiment of the present application also provides a chip, including: a processor and an interface, the processor is coupled with the memory through the interface, and when the processor executes the computer program or instruction in the memory, any one of the methods provided in the above embodiments is implement.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • a software program it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • computer instructions can be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (such as infrared, wireless, microwave, etc.) transmission to another website site, computer, server or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or may include one or more data storage devices such as a server or a data center that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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

Abstract

La présente invention relève du domaine technique des communications et concerne un procédé et un appareil de communication. Dans le procédé, un terminal établit une connexion RRC avec un premier dispositif de réseau d'accès dans une première bande de fréquences, et, lorsqu'une ressource de domaine temporel occupée par des données à envoyer au premier dispositif de réseau d'accès et une ressource de domaine temporel occupée par un préambule à envoyer à un second dispositif de réseau d'accès se chevauchent, le terminal détermine une première TA utilisée lors de l'envoi du préambule au second dispositif de réseau d'accès, et envoie le préambule au second dispositif de réseau d'accès à l'aide de la première TA dans une seconde bande de fréquences, la première TA étant supérieure à 0, ce qui permet d'empêcher un chevauchement excessif de la ressource de domaine temporel occupée par le préambule et de la ressource de domaine temporel occupée par les données, d'éviter une interférence et d'améliorer le taux de réussite de l'accès au réseau. Les systèmes de réseau du premier dispositif de réseau d'accès et du second dispositif de réseau d'accès sont différents, et la première bande de fréquences et la seconde bande de fréquences se chevauchent.
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