CN111511030B - Frequency adjustment method, device and equipment - Google Patents

Frequency adjustment method, device and equipment Download PDF

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Publication number
CN111511030B
CN111511030B CN202010326673.1A CN202010326673A CN111511030B CN 111511030 B CN111511030 B CN 111511030B CN 202010326673 A CN202010326673 A CN 202010326673A CN 111511030 B CN111511030 B CN 111511030B
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Prior art keywords
frequency offset
trs
ssb
determining
frequency
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CN111511030A (en
Inventor
范元伟
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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Priority to CN202010326673.1A priority Critical patent/CN111511030B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Abstract

The embodiment of the application provides a frequency adjustment method, a device and equipment, wherein the method comprises the following steps: receiving first information sent by network equipment in a preset period, wherein the first information comprises a synchronous signal block SSB and/or a channel state information reference signal TRS for tracking; determining the frequency offset of the terminal equipment according to the first information; and adjusting the receiving frequency of the terminal equipment according to the frequency offset. The accuracy of receiving downlink data by the terminal equipment is improved.

Description

Frequency adjustment method, device and equipment
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for adjusting frequency.
Background
In the wireless communication process, before receiving downlink data sent by the network device, the terminal device generally adjusts its receiving frequency, and receives the downlink data according to the receiving frequency.
In the related art, a network device may transmit a channel state information reference signal (channel state information reference signal for tracking, TRS) for transmission to a terminal device, which determines a frequency offset according to the TRS and adjusts an existing reception frequency according to the frequency offset to determine the reception frequency. However, since the period of the TRS is generally large, the frequency cannot be adjusted in time, so that the receiving frequency of the terminal device is inaccurate, and the terminal device cannot accurately receive the downlink data.
Disclosure of Invention
The application provides a frequency adjustment method, a frequency adjustment device and frequency adjustment equipment. The accuracy of receiving downlink data by the terminal equipment is improved.
In a first aspect, an embodiment of the present application provides a frequency adjustment method, including:
receiving first information sent by network equipment in a preset period, wherein the first information comprises a synchronous signal block SSB and/or a channel state information reference signal TRS for tracking;
determining the frequency offset of the terminal equipment according to the first information;
and adjusting the receiving frequency of the terminal equipment according to the frequency offset.
In a possible implementation manner, determining the frequency offset of the terminal device according to the first information includes:
determining the frequency offset from the first information when the first information includes the SSB or the TRS; or alternatively, the process may be performed,
when the first information includes the SSB and the TRS, the frequency offset is determined according to a reception time of the SSB, a reception time of the TRS, and the first information.
In one possible implementation, when the first information includes the SSB or the TRS, determining the frequency offset according to the first information includes:
Determining the frequency offset from the SSB when the first information includes the SSB; or alternatively, the process may be performed,
when the first information includes the TRS, the frequency offset is determined according to the TRS.
In one possible implementation, determining the frequency offset according to the reception time of the SSB, the reception time of the TRS, and the first information includes:
determining the frequency offset according to the TRS or determining the frequency offset according to the TRS and the SSB when a time interval between a reception time of the SSB and a reception time of the TRS is less than or equal to a first time period; or alternatively, the process may be performed,
when the time interval between the time of receipt of the SSB and the time of receipt of the TRS is greater than a first time period, determining a first frequency offset from the SSB, and determining a second frequency offset from the TRS, the frequency offset including the first frequency offset and the second frequency offset.
In one possible implementation, determining the frequency offset from the TRS and the SSB includes:
determining a first signal-to-noise ratio from the TRS and a second signal-to-noise ratio from the SSB;
determining the frequency offset according to the TRS when the first signal-to-noise ratio is greater than or equal to the second signal-to-noise ratio;
And when the first signal-to-noise ratio is smaller than the second signal-to-noise ratio, determining the frequency offset according to the SSB.
In one possible implementation, the frequency offset includes the first frequency offset and the second frequency offset; according to the frequency offset, adjusting the receiving frequency of the terminal equipment comprises the following steps:
after determining to obtain the first frequency offset, adjusting the receiving frequency according to the first frequency offset;
after determining that the second frequency offset is obtained, adjusting the receiving frequency according to the second frequency offset.
In a possible implementation manner, the number of SSBs received by the terminal device in the preset period is greater than 1, and the method further includes:
and receiving first indication information sent by the network equipment, wherein the first indication information is used for indicating SSB included in the first information.
In one possible implementation, the first indication information is a MAC CE.
In a possible implementation manner, the number of TRSs received by the terminal device during the preset period is greater than 1, and the method further includes:
and receiving second indication information sent by the network equipment, wherein the second indication information is used for indicating TRS (total time delay) included in the first information.
In one possible implementation, the second indication information is a MAC CE.
In a second aspect, an embodiment of the present application provides a frequency adjustment device, including a receiving module, a determining module, and an adjusting module, where,
the receiving module is used for receiving first information sent by the network equipment in a preset period, wherein the first information comprises a synchronous signal block SSB and/or a channel state information reference signal TRS for tracking;
the determining module is used for determining the frequency offset of the terminal equipment according to the first information;
the adjusting module is used for adjusting the receiving frequency of the terminal equipment according to the frequency offset.
In one possible implementation manner, the determining module is specifically configured to:
determining the frequency offset from the first information when the first information includes the SSB or the TRS; or alternatively, the process may be performed,
when the first information includes the SSB and the TRS, the frequency offset is determined according to a reception time of the SSB, a reception time of the TRS, and the first information.
In one possible implementation manner, the determining module is specifically configured to:
determining the frequency offset from the SSB when the first information includes the SSB; or alternatively, the process may be performed,
When the first information includes the TRS, the frequency offset is determined according to the TRS.
In one possible implementation manner, the determining module is specifically configured to:
determining the frequency offset according to the TRS or determining the frequency offset according to the TRS and the SSB when a time interval between a reception time of the SSB and a reception time of the TRS is less than or equal to a first time period; or alternatively, the process may be performed,
when the time interval between the time of receipt of the SSB and the time of receipt of the TRS is greater than a first time period, determining a first frequency offset from the SSB, and determining a second frequency offset from the TRS, the frequency offset including the first frequency offset and the second frequency offset.
In one possible implementation manner, the determining module is specifically configured to:
determining a first signal-to-noise ratio from the TRS and a second signal-to-noise ratio from the SSB;
determining the frequency offset according to the TRS when the first signal-to-noise ratio is greater than or equal to the second signal-to-noise ratio;
and when the first signal-to-noise ratio is smaller than the second signal-to-noise ratio, determining the frequency offset according to the SSB.
In one possible implementation, the frequency offset includes the first frequency offset and the second frequency offset; the determining module is specifically configured to:
After determining to obtain the first frequency offset, adjusting the receiving frequency according to the first frequency offset;
after determining that the second frequency offset is obtained, adjusting the receiving frequency according to the second frequency offset.
In a possible implementation manner, the number of SSBs received by the terminal device in the preset period is greater than 1, and the receiving module is further configured to:
and receiving first indication information sent by the network equipment, wherein the first indication information is used for indicating SSB included in the first information.
In one possible implementation, the first indication information is a MAC CE.
In a possible implementation manner, the number of TRSs received by the terminal device during the preset period is greater than 1, and the receiving module is further configured to:
and receiving second indication information sent by the network equipment, wherein the second indication information is used for indicating TRS (total time delay) included in the first information.
In one possible implementation, the second indication information is a MAC CE.
In a third aspect, an embodiment of the present application provides a terminal device, including: a transceiver, a processor, a memory;
the memory stores computer-executable instructions;
The processor executing computer-executable instructions stored in the memory causes the processor to perform the frequency adjustment method of any one of the first aspects.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein computer-executable instructions for implementing the frequency adjustment method of any one of the first aspects when the computer-executable instructions are executed by a processor.
The embodiment of the application provides a frequency adjustment method, a device and equipment, wherein network equipment sends SSB and TRS to terminal equipment. The terminal device may receive the SSB and/or the TRS within a preset period, determine a frequency offset of the terminal device according to the SSB and/or the TRS received by the terminal device, and adjust a receiving frequency of the terminal device according to the frequency offset. In the process of the terminal equipment for frequency adjustment, the terminal equipment can not only perform frequency adjustment according to the TRS, but also perform frequency adjustment according to the SSB, so that the terminal equipment has more time for performing frequency adjustment and more information according to which the frequency adjustment is performed, further, the terminal equipment can determine the frequency offset more timely and accurately, and the accuracy of the terminal equipment for receiving downlink data is improved.
Drawings
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;
fig. 2 is a flow chart of a frequency adjustment method according to an embodiment of the present application;
fig. 3A is a schematic diagram illustrating SSB transmission according to an embodiment of the present application;
FIG. 3B is a schematic diagram illustrating another SSB transmission scheme according to an embodiment of the present application;
fig. 4A is a schematic diagram illustrating transmission of a TRS according to an embodiment of the present application;
fig. 4B is a schematic diagram illustrating another TRS transmission according to an embodiment of the present application;
fig. 5 is a schematic diagram of SSB and TRS transmission according to an embodiment of the present application;
fig. 6 is a flowchart of another frequency adjustment method according to an embodiment of the present application;
fig. 7 is a schematic diagram of frequency adjustment according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a frequency adjustment device according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
For ease of understanding, first, the concepts related to the present application will be described.
Terminal equipment: typically having wireless transceiver functions, the terminal device may be deployed on land, including indoors or outdoors, hand-held, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in unmanned driving (self driving), a wireless terminal in telemedicine (remote media), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wearable terminal device, or the like. The terminal device according to the embodiments of the present application may also be referred to as a terminal, a User Equipment (UE), an access terminal device, a vehicle terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus, etc. The terminal device may also be fixed or mobile.
Network equipment: may be a device for communicating with a mobile device. The network device may be an Access Point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or Access Point, or a vehicle device, a wearable device, and a network device (gNB) in NR network or a network device in future evolved PLMN network, etc.
Frequency offset: in the process of communication between the terminal equipment and the network equipment, crystal oscillators are usually arranged in the terminal equipment and the network equipment, and the terminal equipment and the network equipment keep frequency synchronization through the crystal oscillators. However, in the practical application process, when the stability of the crystal oscillator in the terminal device is not high or the terminal device moves rapidly, the frequencies of the terminal device and the network device deviate, and the deviation of the frequencies may be referred to as frequency offset. The network equipment sends downlink data with a sending frequency, the terminal equipment receives the downlink data with a receiving frequency, and in order to accurately receive the downlink data sent by the network equipment, the terminal equipment detects and compensates the frequency offset between the terminal equipment and the network equipment so as to synchronize the frequency between the terminal equipment and the network equipment, and further, the terminal equipment can accurately receive the downlink data sent by the network equipment.
A communication system to which the embodiment of the present application is applicable will be described with reference to fig. 1.
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application. Referring to fig. 1, the communication system includes a network device 101 and a terminal device 102, between which wireless communication is possible. The communication system may include: global system for mobile communications (Global System of Mobile communication, abbreviated GSM), code division multiple access (Code Division Multiple Access, abbreviated CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, abbreviated WCDMA), long term evolution (Long Term Evolution, abbreviated LTE) or fifth Generation mobile communication (5 th-Generation, abbreviated 5G) systems. Of course, the communication system may be other, and embodiments of the present application are not limited in this regard.
In the embodiment of the application, the network device sends a synchronization signal block (SS/PBCH block, SSB) and a TRS to the terminal device, and the PBCH refers to a physical broadcast channel (Physical Broadcast Channel). The terminal device may receive the SSB and/or the TRS within a preset period, determine a frequency offset of the terminal device according to the SSB and/or the TRS received by the terminal device, and adjust a receiving frequency of the terminal device according to the frequency offset. In the process of the terminal equipment for frequency adjustment, the terminal equipment can not only perform frequency adjustment according to the TRS, but also perform frequency adjustment according to the SSB, so that the terminal equipment has more time for performing frequency adjustment and more information according to which the frequency adjustment is performed, further, the terminal equipment can determine the frequency offset more timely and accurately, and the accuracy of the terminal equipment for receiving downlink data is improved.
The method according to the present application will be described below by way of specific examples. It should be noted that the following embodiments may exist alone or in combination with each other, and for the same or similar content, the description will not be repeated in different embodiments.
Fig. 2 is a flow chart of a frequency adjustment method according to an embodiment of the present application. Referring to fig. 2, the method includes:
s201, the network device sends SSB and TRS to the terminal device.
The network device may periodically send SSBs to the terminal device. For example, the period may be 20 milliseconds (ms), 10ms, etc., and the period of transmitting SSB may be set according to actual needs. Of course, the network device may also send SSBs to the terminal device aperiodically, e.g., the network device may send SSBs to the terminal device at preconfigured times. The network device may continuously send one or more SSBs to the terminal device when the network device sends an SSB to the terminal device once. The process of the network device transmitting SSB to the terminal device will be described below with reference to fig. 3A to 3B.
Fig. 3A is a schematic diagram illustrating SSB transmission according to an embodiment of the present application. Referring to fig. 3A, the network device periodically transmits SSBs to the terminal device, and the period may be 5 time units. The time unit may be one time slot (slot), or may be 1 ms, and the duration of one time slot may be 0.5 ms, 1 ms, 2 ms, or the like. In each cycle, the network device sends an SSB to the terminal device. In each cycle shown in fig. 3A (e.g., cycle T1 and cycle T2), the network device transmits SSB to the terminal device in the first time unit of the cycle.
Fig. 3B is a schematic diagram illustrating another SSB transmission scheme according to an embodiment of the present application. Referring to fig. 3B, the network device periodically transmits SSBs to the terminal device, and the period may be 5 time units. The time unit may be one time slot (slot), or may be 1 ms, and the duration of one time slot may be 0.5 ms, 1 ms, 2 ms, or the like. In each cycle, the network device sends two SSBs to the terminal device. In each cycle shown in fig. 3B (e.g., cycle T1 and cycle T2), the network device transmits SSBs to the terminal device in the first time unit and the second time unit of the cycle, respectively.
The network device may periodically send the TRS to the terminal device. For example, the period may be 20 milliseconds (ms), 10ms, 5ms, etc., and the period of transmitting TRS may be set according to actual needs. Of course, the network device may also send the TRS to the terminal device aperiodically, e.g., the network device may send the TRS to the terminal device at a preconfigured time. The network device may continuously send one or more TRSs to the terminal device when the network device sends a TRS to the terminal device once. Next, a procedure in which the network device transmits a TRS to the terminal device will be described with reference to fig. 3A to 3B.
Fig. 4A is a schematic diagram of transmission of a TRS according to an embodiment of the present application. Referring to fig. 4A, the network device periodically transmits a TRS to the terminal device, and the period may be 5 time units. The time unit may be one time slot (slot), or may be 1 ms, and the duration of one time slot may be 0.5 ms, 1 ms, 2 ms, or the like. The network device transmits a TRS to the terminal device every cycle. In each cycle (e.g., cycle T1 and cycle T2) shown in fig. 4A, the network device transmits a TRS to the terminal device in the first time unit of the cycle.
The TRS according to the present application may indicate a TRS resource or a TRS symbol. When the TRS indicates a TRS symbol, the one TRS symbol corresponds to two TRS resources. For example, referring to fig. 4A, the TRS in each time unit may indicate a TRS symbol, in which case the network device transmits two TRS resources to the terminal device in one time unit, i.e., in time unit 1 of each period (T1 and T2), the network device transmits two TRS resources to the terminal device.
Fig. 4B is a schematic diagram illustrating another TRS transmission according to an embodiment of the present application. Referring to fig. 4B, the network device periodically transmits the TRS to the terminal device, and the period may be 5 time units. The time unit may be one time slot (slot), or may be 1 ms, and the duration of one time slot may be 0.5 ms, 1 ms, 2 ms, or the like. In each cycle, the network device transmits two TRSs to the terminal device. In each cycle (e.g., cycle T1 and cycle T2) shown in fig. 4B, the network device transmits the TRS to the terminal device in the first time unit and the second time unit of the cycle, respectively.
The process of the network device sending SSB to the terminal device is independent of the process of sending TRS to the terminal device. The period of sending SSB by the network device to the terminal device may be the same as or different from the period of sending TRS to the terminal device. The time when the network device sends the SSB to the terminal device may be the same as or different from the time when the TRS is sent to the terminal device. Next, a case where the network device transmits SSB and TRS to the terminal device will be described with reference to fig. 5.
Fig. 5 is a schematic diagram of SSB and TRS transmission according to an embodiment of the present application. Referring to fig. 5, the time when the network device transmits SSB is different from the time when the TRS is transmitted. The network device transmits one SSB in a transmission period (T-SSB) of each SSB, and the network device continuously transmits two TRSs in a transmission period (T-TRS) of each TRS.
S202, the terminal equipment determines the frequency offset of the terminal equipment according to the first information received in the preset period.
The terminal device may periodically determine the frequency offset of the terminal device, and accordingly, the preset period may be a period corresponding to one period in which the terminal device performs frequency adjustment (adjusts the receiving frequency). In other words, the preset period may also be one processing period (period in which the terminal device performs frequency adjustment).
Wherein the first information comprises SSB and/or TRS. That is, the terminal device may receive only SSB, may receive only TRS, or may receive both SSB and TRS within a preset period.
For example, referring to fig. 5, assuming that the preset period is time units 1, 2, 3, the terminal device receives only SSB within the preset period, in which case the first information includes SSB.
For example, referring to fig. 5, assuming that the preset period is the time units 7, 8, 9, 10, the terminal device receives only the TRS within the preset period, in which case the first information includes the TRS.
For example, referring to fig. 5, assuming that the preset period is time units 1, 2, 3, 4, 5, the terminal device receives SSB and TRS within the preset period, in which case the first information includes SSB and TRS.
Optionally, when the content included in the first information is different, the manner in which the terminal device determines the frequency offset is also different. The following means may be included:
mode 1 includes SSB in the first information.
When only SSB is included in the first information, then the frequency offset is determined according to the SSB.
If the terminal equipment receives one SSB within a preset period, the first information comprises the one SSB, and the terminal equipment determines the frequency offset according to the one SSB.
If the terminal device receives a plurality of SSBs within a preset period, the terminal device may first determine a target SSB from the plurality of SSBs, determine that the first information includes the target SSB, and determine a frequency offset according to the target SSB. Optionally, if the plurality of SSBs are sent by the network device to the terminal device in one SSB period (period of sending the SSBs), the network device may further send first indication information to the terminal device, where the first indication information may indicate the target SSB, and correspondingly, the terminal device determines the target SSB according to the first indication information. Alternatively, the first indication information may be a media access control (media access control, MAC) Control Element (CE).
Optionally, before the terminal device determines the frequency offset according to the SSB, the terminal device may further obtain a signal-to-noise ratio of the SSB, and determine whether to determine the frequency offset according to the SSB according to the signal-to-noise ratio of the SSB. The signal-to-noise ratio of the SSB may indicate the signal quality of the SSB, the greater the signal-to-noise ratio of the SSB, indicating the higher the signal quality of the SSB.
If the signal-to-noise ratio of the SSB is greater than or equal to a preset threshold, the terminal equipment determines the frequency offset according to the SSB. If the signal-to-noise ratio of the SSB is smaller than the preset threshold, the terminal device does not determine the frequency offset according to the SSB. When the signal-to-noise ratio of the SSB is smaller than the preset threshold, it indicates that the signal quality of the SSB is poor, in which case the error of the frequency offset determined according to the SSB is large, and in order to prevent improper adjustment of the frequency offset, the terminal device may discard the SSB and not determine the frequency offset according to the SSB.
Alternatively, the terminal device may determine the frequency offset from the SSB by hardware or digital signal processing (Digital Signal Processing, DSP for short). The frequency offset may be determined from demodulation reference signals (Demodulation Reference Signal, DMRS) of the SSB, or may be determined using reconstructed data after decoding the SSB.
Mode 2, the first information includes TRS.
When only the TRS is included in the first information, then the frequency offset is determined according to the TRS.
If the terminal device receives one TRS within the preset period, the first information comprises the one TRS, and the terminal device determines the frequency offset according to the one TRS.
If the terminal device receives a plurality of TRSs within a preset period, the terminal device may first determine a target TRS among the plurality of TRSs, determine that the target TRS is included in the first information, and determine a frequency offset according to the target TRS. Optionally, if the plurality of TRSs are sent by the network device to the terminal device in one TRS period (period of sending the TRSs), the network device may further send second indication information to the terminal device, where the second indication information may indicate the target TRS, and correspondingly, the terminal device determines the target TRS according to the second indication information. Alternatively, the second indication information may be a MAC CE.
Optionally, before the terminal device determines the frequency offset according to the TRS, the terminal device may further obtain a signal-to-noise ratio of the TRS, and determine whether to determine the frequency offset according to the TRS according to the signal-to-noise ratio of the TRS. The signal-to-noise ratio of the TRS may be indicative of the signal quality of the TRS, with a greater signal-to-noise ratio of the TRS indicating a higher signal quality of the TRS.
If the signal-to-noise ratio of the TRS is greater than or equal to a preset threshold, the terminal equipment determines the frequency offset according to the TRS. If the signal-to-noise ratio of the TRS is smaller than the preset threshold, the terminal equipment does not determine the frequency offset according to the TRS. When the signal-to-noise ratio of the TRS is smaller than the preset threshold, it indicates that the signal quality of the TRS is poor, in which case the error of the frequency offset determined according to the TRS is large, and in order to prevent improper adjustment of the frequency offset, the terminal device may discard the TRS and not determine the frequency offset according to the TRS.
Alternatively, the terminal device may determine the frequency offset from the TRS by hardware or digital signal processing (Digital Signal Processing, abbreviated DSP).
Mode 3, the first information includes SSB and TRS.
When the SSB and the TRS are included in the first information, then a frequency offset is determined based on the reception time of the SSB, the reception time of the TRS, and the first information.
The method for determining the frequency offset according to the time interval between the time of receipt of the SSB and the time of receipt of the TRS may be determined according to the time interval between the time of receipt of the SSB and the time of receipt of the TRS, and may include the following two cases:
case 1, time interval is less than or equal to the first duration.
The time interval may be an absolute value of a difference between the reception time of the SSB and the reception time of the TRS. The time interval may be represented by a duration or may be represented by a number of time units, e.g., the time interval may be 1 time unit, 2 time units, etc. When the time interval is represented by the number of time units, the first duration may also be represented by the number of time units.
In this case, the frequency offset may be determined according to the TRS, or determined according to the TRS and SSB.
It should be noted that, the manner of determining the frequency offset according to the TRS may be referred to as manner 2, and will not be described herein.
The frequency offset may be determined from the TRS and SSB as follows: determining a first signal-to-noise ratio according to the TRS, and determining a second signal-to-noise ratio according to the SSB, and determining a frequency offset according to the TRS when the first signal-to-noise ratio is greater than or equal to the second signal-to-noise ratio; and determining the frequency offset according to the SSB when the first signal-to-noise ratio is smaller than the second signal-to-noise ratio. In this way, the frequency offset is determined according to the information (TRS or SSB) with higher signal quality selected according to the signal-to-noise ratio, so that the frequency offset obtained by the determination can be more accurate.
Case 2, time interval is greater than the first duration.
In this case, the first frequency offset may be determined according to the SSB, and the second frequency offset may be determined according to the TRS. That is, the frequency offset includes a first frequency offset and a second frequency offset.
It should be noted that, the manner of determining the frequency offset according to the SSB may be referred to as manner 1, the manner of determining the frequency offset according to the TRS may be referred to as manner 2, and the description thereof will not be repeated here.
In the above-described mode 3, after the terminal device receives the SSB, the terminal device determines the frequency offset according to the SSB, and after the terminal device receives the TRS, the terminal device determines the frequency offset according to the TRS. After the terminal device receives the SSB and the TRS, the terminal device determines a frequency offset according to which the frequency adjustment is performed according to the time interval, so that the efficiency of determining the frequency offset can be higher.
S203, the terminal equipment adjusts the receiving frequency of the terminal equipment according to the frequency offset.
Optionally, the crystal oscillator of the terminal device may be adjusted according to the frequency offset, so as to adjust the receiving frequency of the terminal device.
When the frequency offset includes a first frequency offset and a second frequency offset, the terminal device adjusts the reception frequency of the terminal device according to the first frequency offset and the second frequency offset, respectively. Optionally, after the terminal device determines to obtain the first frequency offset, the terminal device adjusts the receiving frequency of the terminal device according to the first frequency offset; after the terminal device determines to obtain the second frequency offset, the terminal device adjusts the receiving frequency of the terminal device according to the second frequency offset. In this case, the terminal device makes two adjustments to the reception frequency.
According to the frequency adjustment method provided by the embodiment of the application, the network equipment sends the SSB and the TRS to the terminal equipment. The terminal device may receive the SSB and/or the TRS within a preset period, determine a frequency offset of the terminal device according to the SSB and/or the TRS received by the terminal device, and adjust a receiving frequency of the terminal device according to the frequency offset. In the process of the terminal equipment for frequency adjustment, the terminal equipment can not only perform frequency adjustment according to the TRS, but also perform frequency adjustment according to the SSB, so that the terminal equipment has more time for performing frequency adjustment and more information according to which the frequency adjustment is performed, further, the terminal equipment can determine the frequency offset more timely and accurately, and the accuracy of the terminal equipment for receiving downlink data is improved.
On the basis of any one of the above embodiments, a frequency adjustment method will be further described with reference to fig. 6.
Fig. 6 is a flowchart of another frequency adjustment method according to an embodiment of the present application. Referring to fig. 6, the method may include:
s601, the terminal equipment receives first information in a preset period.
When the contents included in the first information are different, the process of the terminal device performing frequency adjustment according to the first information is also different.
When SSB is included in the first information, S602 is performed.
When the TRS is included in the first information, S603 is performed.
When the SSB and the TRS are included in the first information, S604-is performed.
S602, determining a frequency offset according to the SSB, and adjusting the receiving frequency of the terminal equipment according to the frequency offset.
It should be noted that, the process of determining the frequency offset according to the SSB may refer to mode 1 in S202, the process of adjusting the receiving frequency of the terminal device according to the frequency offset may refer to S203, and the description thereof will not be repeated here.
S603, determining a frequency offset according to the TRS, and adjusting the receiving frequency of the terminal equipment according to the frequency offset.
It should be noted that, the process of determining the frequency offset according to the STR may refer to mode 2 in S202, the process of adjusting the receiving frequency of the terminal device according to the frequency offset may refer to S203, and the description thereof will not be repeated here.
S604, determining a time interval between the SSB reception time and the TRS reception time according to the SSB reception time and the TRS reception time.
The time interval may be an absolute value of a difference between the reception time of the SSB and the reception time of the TRS. The time interval may be represented by a duration or may be represented by a number of time units, e.g., the time interval may be 1 time unit, 2 time units, etc.
S605, judging whether the time interval is smaller than or equal to the first duration.
If yes, then S607-S609 are performed.
If not, S610-S611 are performed.
Note that, in the case where the time interval is less than or equal to the first time period, only S608 may be executed.
S606, determining a first signal-to-noise ratio according to the TRS, and determining a second signal-to-noise ratio according to the SSB.
S607, judging whether the first signal-to-noise ratio is larger than or equal to the second signal-to-noise ratio.
If yes, S608 is executed.
If yes, S609 is executed.
S608, determining a frequency offset according to the TRS, and adjusting the receiving frequency of the terminal equipment according to the frequency offset.
It should be noted that, the process of determining the frequency offset according to the STR may refer to mode 2 in S202, the process of adjusting the receiving frequency of the terminal device according to the frequency offset may refer to S203, and the description thereof will not be repeated here.
S609, determining a frequency offset according to the SSB, and adjusting the receiving frequency of the terminal equipment according to the frequency offset.
It should be noted that, the process of determining the frequency offset according to the SSB may refer to mode 1 in S202, the process of adjusting the receiving frequency of the terminal device according to the frequency offset may refer to S203, and the description thereof will not be repeated here.
S610, determining a first frequency offset according to the SSB, and adjusting the receiving frequency of the terminal equipment according to the first frequency offset.
It should be noted that, the process of determining the first frequency offset according to the SSB may refer to mode 1 in S202, the process of adjusting the receiving frequency of the terminal device according to the first frequency offset may refer to S203, and the description thereof will not be repeated here.
S611, determining a second frequency offset according to the TRS, and adjusting a reception frequency of the terminal device according to the second frequency offset.
It should be noted that, the process of determining the second frequency offset according to the STR may refer to mode 2 in S202, and the process of adjusting the receiving frequency of the terminal device according to the second frequency offset may refer to S203, which is not described herein.
In the above process, the terminal device can not only perform frequency adjustment according to the TRS, but also perform frequency adjustment according to the SSB, so that the terminal device has more time for performing frequency adjustment and more information according to which the frequency adjustment is performed, so that the terminal device can determine the frequency offset more timely and more accurately, and the accuracy of receiving downlink data by the terminal device is improved.
Next, the above-described frequency adjustment process will be described with reference to fig. 7. Fig. 7 is a schematic diagram of frequency adjustment according to an embodiment of the present application.
In the frequency adjustment period T1, the terminal device receives only the SSB, and therefore, in the frequency adjustment period T1, the terminal device determines a frequency offset from the received SSB and adjusts the reception frequency of the terminal device according to the frequency offset.
In the frequency adjustment period T2, the terminal device has received only the TRS, and therefore, in the frequency adjustment period T2, the terminal device determines a frequency offset from the received TRS and adjusts the reception frequency of the terminal device according to the frequency offset.
In the frequency adjustment period T3, the terminal device has received only the TRS and SSB, and the time interval between the time when the TRS is received and the time when the SSB is received is longer than the first time period (for example, 1 time unit), so in the frequency adjustment period T3, after the terminal device has received the TRS, the terminal device determines a frequency offset 1 according to the TRS, and adjusts the reception frequency of the terminal device according to the frequency offset 2. After the terminal device receives the SSB, the terminal device determines a frequency offset 2 according to the SSB, and adjusts the reception frequency of the terminal device according to the frequency offset 2.
Fig. 8 is a schematic structural diagram of a frequency adjustment device according to an embodiment of the present application. The frequency adjustment device 10 may be provided in a terminal apparatus. Referring to fig. 8, the frequency adjustment device may include a receiving module 11, a determining module 12, and an adjusting module 13, wherein,
the receiving module 11 is configured to receive first information sent by a network device during a preset period, where the first information includes a synchronization signal block SSB and/or a tracking channel state information reference signal TRS;
The determining module 12 is configured to determine a frequency offset of the terminal device according to the first information;
the adjusting module 13 is configured to adjust the receiving frequency of the terminal device according to the frequency offset.
The frequency adjustment device provided by the embodiment of the application can execute the technical scheme shown in the embodiment of the method, and the implementation principle and the beneficial effects are similar, and are not repeated here.
In one possible implementation, the determining module 12 is specifically configured to:
determining the frequency offset from the first information when the first information includes the SSB or the TRS; or alternatively, the process may be performed,
when the first information includes the SSB and the TRS, the frequency offset is determined according to a reception time of the SSB, a reception time of the TRS, and the first information.
In one possible implementation, the determining module 12 is specifically configured to:
determining the frequency offset from the SSB when the first information includes the SSB; or alternatively, the process may be performed,
when the first information includes the TRS, the frequency offset is determined according to the TRS.
In one possible implementation, the determining module 12 is specifically configured to:
Determining the frequency offset according to the TRS or determining the frequency offset according to the TRS and the SSB when a time interval between a reception time of the SSB and a reception time of the TRS is less than or equal to a first time period; or alternatively, the process may be performed,
when the time interval between the time of receipt of the SSB and the time of receipt of the TRS is greater than a first time period, determining a first frequency offset from the SSB, and determining a second frequency offset from the TRS, the frequency offset including the first frequency offset and the second frequency offset.
In one possible implementation, the determining module 12 is specifically configured to:
determining a first signal-to-noise ratio from the TRS and a second signal-to-noise ratio from the SSB;
determining the frequency offset according to the TRS when the first signal-to-noise ratio is greater than or equal to the second signal-to-noise ratio;
and when the first signal-to-noise ratio is smaller than the second signal-to-noise ratio, determining the frequency offset according to the SSB.
In one possible implementation, the frequency offset includes the first frequency offset and the second frequency offset; the determining module 12 is specifically configured to:
after determining to obtain the first frequency offset, adjusting the receiving frequency according to the first frequency offset;
After determining that the second frequency offset is obtained, adjusting the receiving frequency according to the second frequency offset.
In a possible implementation manner, the number of SSBs received by the terminal device in the preset period is greater than 1, and the receiving module 11 is further configured to:
and receiving first indication information sent by the network equipment, wherein the first indication information is used for indicating SSB included in the first information.
In one possible implementation, the first indication information is a MAC CE.
In a possible implementation manner, the number of TRSs received by the terminal device during the preset period is greater than 1, and the receiving module 11 is further configured to:
and receiving second indication information sent by the network equipment, wherein the second indication information is used for indicating TRS (total time delay) included in the first information.
In one possible implementation, the second indication information is a MAC CE.
The frequency adjustment device provided by the embodiment of the application can execute the technical scheme shown in the embodiment of the method, and the implementation principle and the beneficial effects are similar, and are not repeated here.
Fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application. Referring to fig. 9, the terminal device 20 may include: a transceiver 21, a memory 22, a processor 23. The transceiver 21 may include: a transmitter and/or a receiver. The transmitter may also be referred to as a transmitter, transmit port, transmit interface, or the like, and the receiver may also be referred to as a receiver, receive port, receive interface, or the like. The transceiver 21, the memory 22, and the processor 23 are illustratively interconnected by a bus 24.
The memory 22 is used for storing program instructions;
the processor 23 is configured to execute the program instructions stored in the memory, so as to cause the terminal device 20 to execute any of the communication methods described above.
Wherein the receiver of the transceiver 21 is operable to perform the receiving function of the terminal device in the communication method described above.
Embodiments of the present application provide a computer-readable storage medium having stored therein computer-executable instructions for implementing the above-described frequency adjustment method when the computer-executable instructions are executed by a processor.
Embodiments of the present application may also provide a computer program product executable by a processor, which when executed, may implement a frequency adjustment method performed by any of the above-described terminal devices.
The terminal device, the computer readable storage medium and the computer program product in the embodiments of the present application can execute the communication method executed by the terminal device, and specific implementation processes and beneficial effects thereof are referred to above and are not described herein.
All or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a readable memory. The program, when executed, performs steps including the method embodiments described above; and the aforementioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state disk, magnetic tape, floppy disk, optical disk, and any combination thereof.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims and the equivalents thereof, the present application is also intended to include such modifications and variations.
In the present disclosure, the term "include" and variations thereof may refer to non-limiting inclusion; the term "or" and variations thereof may refer to "and/or". The terms "first," "second," and the like in this specification are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. In the present application, "a plurality of" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Claims (14)

1. A method of frequency adjustment, comprising:
receiving first information sent by network equipment in a preset period, wherein the first information comprises a synchronous signal block SSB and a tracking channel state information reference signal TRS;
determining the frequency offset of the terminal equipment according to the first information;
according to the frequency offset, adjusting the receiving frequency of the terminal equipment;
according to the first information, determining the frequency offset of the terminal equipment comprises the following steps:
determining the frequency offset according to a reception time of the SSB, a reception time of the TRS, and the first information when the first information includes the SSB and the TRS;
determining the frequency offset according to the reception time of the SSB, the reception time of the TRS, and the first information, includes:
determining the frequency offset according to the TRS or determining the frequency offset according to the TRS and the SSB when a time interval between a reception time of the SSB and a reception time of the TRS is less than or equal to a first time period; or alternatively, the process may be performed,
determining a first frequency offset from the SSB and a second frequency offset from the TRS when a time interval between a time of receipt of the SSB and a time of receipt of the TRS is greater than a first time period, the frequency offsets including the first frequency offset and the second frequency offset;
According to the frequency offset, adjusting the receiving frequency of the terminal equipment comprises the following steps:
after determining to obtain the first frequency offset, adjusting the receiving frequency according to the first frequency offset;
after determining that the second frequency offset is obtained, adjusting the receiving frequency according to the second frequency offset.
2. The method of claim 1, wherein determining the frequency offset from the TRS and the SSB comprises:
determining a first signal-to-noise ratio from the TRS and a second signal-to-noise ratio from the SSB;
determining the frequency offset according to the TRS when the first signal-to-noise ratio is greater than or equal to the second signal-to-noise ratio;
and when the first signal-to-noise ratio is smaller than the second signal-to-noise ratio, determining the frequency offset according to the SSB.
3. The method according to claim 1 or 2, wherein the number of SSBs received by the terminal device within the preset period is greater than 1, the method further comprising:
and receiving first indication information sent by the network equipment, wherein the first indication information is used for indicating SSB included in the first information.
4. The method of claim 3, wherein the first indication information is a MAC CE.
5. The method according to claim 1 or 2, wherein the number of TRSs received by the terminal device during the preset period is greater than 1, the method further comprising:
and receiving second indication information sent by the network equipment, wherein the second indication information is used for indicating TRS (total time delay) included in the first information.
6. The method of claim 5, wherein the second indication information is a MAC CE.
7. A frequency adjusting device is characterized by comprising a receiving module, a determining module and an adjusting module, wherein,
the receiving module is used for receiving first information sent by the network equipment in a preset period, wherein the first information comprises a synchronous signal block SSB and a channel state information reference signal TRS for tracking;
the determining module is used for determining the frequency offset of the terminal equipment according to the first information;
the adjusting module is used for adjusting the receiving frequency of the terminal equipment according to the frequency offset;
the determining module is specifically configured to:
determining the frequency offset according to a reception time of the SSB, a reception time of the TRS, and the first information when the first information includes the SSB and the TRS;
The determining module is specifically configured to:
determining the frequency offset according to the TRS or determining the frequency offset according to the TRS and the SSB when a time interval between a reception time of the SSB and a reception time of the TRS is less than or equal to a first time period; or alternatively, the process may be performed,
determining a first frequency offset from the SSB and a second frequency offset from the TRS when a time interval between a time of receipt of the SSB and a time of receipt of the TRS is greater than a first time period, the frequency offsets including the first frequency offset and the second frequency offset;
the determining module is specifically configured to:
after determining to obtain the first frequency offset, adjusting the receiving frequency according to the first frequency offset;
after determining that the second frequency offset is obtained, adjusting the receiving frequency according to the second frequency offset.
8. The apparatus of claim 7, wherein when the determining module is configured to determine the frequency offset based on the TRS and the SSB, the determining module is configured to:
determining a first signal-to-noise ratio from the TRS and a second signal-to-noise ratio from the SSB;
Determining the frequency offset according to the TRS when the first signal-to-noise ratio is greater than or equal to the second signal-to-noise ratio;
and when the first signal-to-noise ratio is smaller than the second signal-to-noise ratio, determining the frequency offset according to the SSB.
9. The apparatus of claim 7 or 8, wherein the number of SSBs received by the terminal device during the preset period is greater than 1, and wherein the receiving module is further configured to:
and receiving first indication information sent by the network equipment, wherein the first indication information is used for indicating SSB included in the first information.
10. The apparatus of claim 9, wherein the first indication information is a MAC CE.
11. The apparatus of claim 7 or 8, wherein the number of TRSs received by the terminal device during the preset period is greater than 1, and wherein the receiving module is further configured to:
and receiving second indication information sent by the network equipment, wherein the second indication information is used for indicating TRS (total time delay) included in the first information.
12. The apparatus of claim 11, wherein the second indication information is a MAC CE.
13. A terminal device, comprising: a transceiver, a processor, a memory;
The memory stores computer-executable instructions;
the processor executing computer-executable instructions stored in the memory causes the processor to perform the frequency adjustment method of any one of claims 1 to 6.
14. A computer readable storage medium having stored therein computer executable instructions for implementing the frequency adjustment method of any of claims 1 to 6 when the computer executable instructions are executed by a processor.
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