CN113079576A

CN113079576A - Processing method and device for BWP switching indication and computer-readable storage medium

Info

Publication number: CN113079576A
Application number: CN202110310740.5A
Authority: CN
Inventors: 谭霞
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-07-06
Anticipated expiration: 2041-03-23
Also published as: WO2022199366A1; CN113079576B

Abstract

A processing method and apparatus, computer readable storage medium, for BWP handover indication, the method comprising: in response to detecting the DCI indicating the BWP handover, judging whether effective uplink and downlink scheduling occurs in the original BWP before the handover to the target BWP; and if the judgment result shows that effective uplink and downlink scheduling does not occur, switching to the target BWP. The scheme of the invention can more accurately filter the DCI which indicates the BWP switching and is detected virtually, ensure that the UE and the base station are always in the same BWP, and improve and ensure the communication quality.

Description

Processing method and device for BWP switching indication and computer-readable storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for processing a BWP handover indication, and a computer-readable storage medium.

Background

Because the New Radio (NR, also called New air interface) in the external field is located in a higher frequency band and is more sensitive to the channel environment, certain frequency bands of NR share time-frequency domain resources with Long Term Evolution (LTE), and there are more external field co-frequency cells. A Downlink Control Information (DCI) false detection rate of a User Equipment (User Equipment, abbreviated as UE) operating in an actual wireless environment is generally high. If the DCI indicating the partial Bandwidth (BWP) is detected virtually.

Since BWP handover may cause the UE and the base station to be out of association, if the UE falsely picks up DCI indicating BWP handover, the entire flow of the UE will change, thereby affecting the entire communication performance.

Therefore, the UE needs to be more careful in the DCI for indicating the BWP handover. However, the UE in the prior art cannot filter out the DCI indicating BWP handover, which is detected falsely, and the communication quality with the base station is seriously affected.

Disclosure of Invention

The technical problem solved by the invention is how to more accurately filter the DCI which indicates BWP switching and is subjected to virtual detection, ensure that the UE and the base station are always in the same BWP, and improve and ensure the communication quality.

To solve the foregoing technical problem, an embodiment of the present invention provides a method for processing a BWP switch indication, including: in response to detecting the DCI indicating the BWP handover, judging whether effective uplink and downlink scheduling occurs in the original BWP before the handover to the target BWP; and if the judgment result shows that effective uplink and downlink scheduling does not occur, switching to the target BWP.

Optionally, the processing method further includes: and if the judgment result shows that the effective uplink and downlink scheduling occurs, continuing to reside in the original BWP.

Optionally, the processing method further includes: and immediately switching to the target BWP if the DCI indicating the switching to the target BWP is received again before the switching to the target BWP.

Optionally, the determining whether effective uplink and downlink scheduling occurs in the original BWP before switching to the target BWP includes: judging whether uplink and downlink scheduling occurs in the original BWP before switching to the target BWP; and if the judgment result shows that the uplink and downlink scheduling occurs, judging whether the uplink and downlink scheduling is effective according to the decoding result of the uplink and downlink scheduling.

Optionally, the determining whether uplink and downlink scheduling occurs in the original BWP before switching to the target BWP includes: judging whether other DCI is detected in the original BWP before switching to the target BWP; it is determined whether scheduling of data transmission occurs at the original BWP before switching to the target BWP.

Optionally, the determining, according to the decoding result of the uplink and downlink scheduling, whether the uplink and downlink scheduling is valid includes: if no other DCI is detected in the original BWP before switching to the target BWP, but scheduling of data transmission occurs, receiving the data in the original BWP; and judging whether the uplink and downlink scheduling is effective or not according to the decoding result of the data.

Optionally, the DCI indicating the scheduling of the data transmission is transmitted in a time slot before the DCI indicating the BWP handover is detected.

Optionally, the determining, according to the decoding result of the uplink and downlink scheduling, whether the uplink and downlink scheduling is valid includes: if other DCI is detected in the original BWP before switching to the target BWP and scheduling of data transmission occurs, comparing the decoding confidence degrees of the other DCI and the DCI indicating the BWP switching; if the decoding confidence of the other DCIs is greater than the decoding confidence of the DCI indicating the BWP switching, and the deviation of the other DCIs is greater than a first preset threshold, determining that the uplink and downlink scheduling is effective; if the decoding confidence of the other DCIs is smaller than the decoding confidence of the DCI indicating the BWP switching, and the deviation of the other DCIs is larger than the first preset threshold, determining that the uplink and downlink scheduling is invalid; and if the deviation between the decoding confidence degrees of the other DCIs and the decoding confidence degree of the DCI indicating the BWP switching is smaller than the first preset threshold, receiving the data at the original BWP, and judging whether the uplink and downlink scheduling is effective according to the decoding result of the data.

Optionally, the determining whether the uplink and downlink scheduling is valid according to the decoding result of the data includes: if the decoding result of the data indicates that the data is valid, determining that the uplink and downlink scheduling is valid; and if the decoding result of the data indicates that the data is invalid, determining that the uplink and downlink scheduling is invalid.

Optionally, the data validity at least includes any one of the following cases: the received PDSCH is valid; and the decoding of other detected DCI is successful.

Optionally, after switching to the target BWP, the processing method further includes: judging whether DCI or an effective PDSCH is received in the target BWP within a preset period; if the DCI and the effective PDSCH are not received in the preset period, switching back to the original BWP; and if the DCI or the effective PDSCH is received in the preset period, continuing to reside in the target BWP.

Optionally, the decoding confidence of the DCI indicating the BWP handover is greater than or equal to a second preset threshold.

Optionally, the preset period is shorter than a duration of a BWP inactivity timer, where the BWP inactivity timer is indicated by the DCI indicating BWP switching.

Optionally, if the DCI instructing the BWP switching is a downlink DCI, after the switching to the target BWP, the processing method further includes: receiving and decoding a PDSCH at the target BWP; if the decoding result shows that the PDSCH is effective, continuing residing in the target BWP; and if the decoding result shows that the PDSCH is invalid, switching back to the original BWP.

Optionally, if the DCI instructing the BWP switching is an uplink DCI, after switching to the target BWP, the processing method further includes: suspending PUSCH transmission at the target BWP; if DCI indicating PUSCH retransmission is received in a HARQ period or other DCI is detected, continuing residing in the target BWP; and if the DCI indicating the PUSCH retransmission is not received or other DCIs are detected after the HARQ period is exceeded, switching back to the original BWP.

Optionally, the decoding confidence of the DCI indicating the BWP handover is smaller than a second preset threshold.

Optionally, the DCI is a USS DCI.

Optionally, before determining whether effective uplink and downlink scheduling occurs in the original BWP before switching to the target BWP, the processing method further includes: performing validity detection on at least part of bit fields of the DCI for indicating BWP switching; if the validity detection is passed, whether effective uplink and downlink scheduling occurs in the original BWP before switching to the target BWP is judged.

To solve the above technical problem, an embodiment of the present invention further provides a processing apparatus for a BWP switch indication, including: the judging module is used for responding to the detection of the DCI indicating the BWP switching, and judging whether effective uplink and downlink scheduling occurs in the original BWP before the switching to the target BWP; and the switching module is used for switching to the target BWP if the judgment result shows that the effective uplink and downlink scheduling does not occur.

To solve the above technical problem, an embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the above method.

In order to solve the above technical problem, an embodiment of the present invention further provides a processing apparatus for BWP switch indication, including a memory and a processor, where the memory stores a computer program executable on the processor, and the processor executes the steps of the method when executing the computer program.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

an embodiment of the present invention provides a processing method for a BWP handover indication, including: in response to detecting the DCI indicating the BWP handover, judging whether effective uplink and downlink scheduling occurs in the original BWP before the handover to the target BWP; and if the judgment result shows that effective uplink and downlink scheduling does not occur, switching to the target BWP.

Compared with the NR prior art that only simple bit-field determination is performed on DCI instructing BWP handover, the present embodiment identifies the falsely detected DCI instructing BWP handover as much as possible by combining detection of subsequent scheduling on the original BWP after instructing BWP handover, thereby ensuring that UE and base station are in the same BWP and ensuring communication quality. Specifically, in conjunction with the protocol description, it may be determined that, during the handover of the UE to the target BWP after the BWP handover is indicated, the base station may not perform uplink and downlink scheduling on the UE on the original BWP in principle. Therefore, whether the DCI for indicating the BWP switching is real and effective can be accurately judged by monitoring whether the uplink and downlink scheduling still exists on the original BWP after the DCI for indicating the BWP switching is detected.

Further, after switching to the target BWP, the processing method further includes: judging whether DCI or an effective PDSCH is received in the target BWP within a preset period; if the DCI and the effective PDSCH are not received in the preset period, switching back to the original BWP; and if the DCI or the effective PDSCH is received in the preset period, continuing to reside in the target BWP. Therefore, whether the BWP handover is reasonable or not can be confirmed similarly according to the scheduling situation of the target cell to be handed over.

Further, if the DCI instructing the BWP handover is downlink DCI, after the handover to the target BWP, the processing method further includes: receiving and decoding a PDSCH at the target BWP; if the decoding result shows that the PDSCH is effective, continuing residing in the target BWP; and if the decoding result shows that the PDSCH is invalid, switching back to the original BWP. Therefore, whether the BWP handover is reasonable or not can be confirmed similarly according to the scheduling situation of the target cell to be handed over.

Further, if the DCI indicating the BWP handover is an uplink DCI, after the handover to the target BWP, the processing method further includes: suspending PUSCH transmission at the target BWP; if DCI indicating PUSCH retransmission is received in a HARQ period or other DCI is detected, continuing residing in the target BWP; and if the DCI indicating the PUSCH retransmission is not received or other DCIs are detected after the HARQ period is exceeded, switching back to the original BWP. Therefore, whether the BWP handover is reasonable or not can be confirmed similarly according to the scheduling situation of the target cell to be handed over.

Drawings

Fig. 1 is a flowchart of a processing method for BWP handover indication according to an embodiment of the present invention;

FIG. 2 is a flowchart of one embodiment of step S101 of FIG. 1;

FIG. 3 is a diagram illustrating a first exemplary application scenario of an embodiment of the present invention;

FIG. 4 is a diagram illustrating a second exemplary application scenario of the present invention;

fig. 5 is a schematic structural diagram of a processing apparatus for BWP handover indication according to an embodiment of the present invention.

Detailed Description

As mentioned in the background, the existing UE cannot filter out the DCI indicating BWP handover, which is detected falsely, and the communication quality with the base station is seriously affected.

Specifically, NR has only performed simple bit field determination on DCI instructing BWP handover, sometimes the dummy DCI cannot be completely filtered by the bit field determination alone, and each bit field determination has too long processing time for some UEs, which affects subsequent flow scheduling. Therefore, the UE in the prior art may easily trigger the BWP handover procedure by mistake, which causes the UE and the base station to be out of synchronization and affects the communication performance.

To solve the above technical problem, the inventors of the present application discovered, through analyzing the description of the communication protocol 38.213, that the UE will not need to receive and transmit between detecting DCI indicating BWP handover by the UE and switching to a target BWP to receive a Physical Downlink Shared Channel (PDSCH) or transmit a Physical Uplink Shared Channel (PUSCH).

Therefore, it can be reasonably presumed that the base station will not transmit a Physical Downlink Control Channel (PDCCH) to the UE or receive the PDSCH through the original BWP during the period.

Meanwhile, the base station should consider the case that the UE has missed detection, and cannot directly switch to the target BWP through only one DCI. Therefore, if the base station detects that the UE does not cut to the target BWP, the base station should need to be compatible with the original BWP to initiate the DCI instructing to switch to the target BWP again.

In addition, the UE may also confirm whether the BWP handover is reasonable according to the scheduling of the handover to the target BWP corresponding cell (i.e., the target cell).

Based on the above analysis, the present embodiment provides a processing method for a BWP switch indication, including: in response to detecting the DCI indicating the BWP handover, judging whether effective uplink and downlink scheduling occurs in the original BWP before the handover to the target BWP; and if the judgment result shows that effective uplink and downlink scheduling does not occur, switching to the target BWP.

In the embodiment, the subsequent scheduling condition on the original BWP after the instruction BWP handover is detected is combined, and the DCI instructing the BWP handover and detected virtually is identified as much as possible, so that the UE and the base station are ensured to be in the same BWP, and the communication quality is ensured. Specifically, in conjunction with the protocol description, it may be determined that, during the handover of the UE to the target BWP after the BWP handover is indicated, the base station may not perform uplink and downlink scheduling on the UE on the original BWP in principle. Therefore, whether the DCI for indicating the BWP switching is real and effective can be accurately judged by monitoring whether the uplink and downlink scheduling still exists on the original BWP after the DCI for indicating the BWP switching is detected.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart of a processing method for BWP handover indication according to an embodiment of the present invention.

This embodiment may be performed by the user equipment side, such as by a UE on the user equipment side.

The embodiment can be applied to an external field NR scene, namely a scene that UE in an actual wireless environment communicates with a base station. The outfield NR scenario is distinguished from the laboratory scenario, and the signal environment of the outfield NR is usually more complex and less good than the signal in the laboratory environment.

In a specific implementation, the processing method for the BWP switching indication provided in steps S101 to S103 may be executed by a chip with the BWP switching function in the user equipment, or may be executed by a baseband chip in the user equipment.

Specifically, referring to fig. 1, the processing method for BWP handover indication according to this embodiment may include the following steps:

step S101, in response to detecting DCI indicating BWP switching, judging whether effective uplink and downlink scheduling occurs in an original BWP before switching to a target BWP;

if the determination result in step S101 is no, that is, no effective uplink/downlink scheduling occurs, step S102 is executed, that is, the target BWP is switched to.

If the determination result in step S101 is yes, that is, effective uplink and downlink scheduling occurs, step S103 is executed, that is, the original BWP continues to reside.

Further, the original BWP refers to the BWP where the UE currently resides, and only the BWP where the DCI indicating the BWP handover is detected. The target BWP indicates the BWP indicated in the DCI for BWP handover, i.e., the BWP to which the UE is expected to handover.

Further, the DCI is UE Specific Search Space (USS) DCI, which is abbreviated as USS DCI.

Further, the uplink and downlink scheduling includes scheduling of receiving a PDCCH, receiving a PDSCH, and transmitting a PUSCH. When any one of the schedules is judged to be effective after being decoded and the like, the effective uplink and downlink scheduling is determined to occur. For example, receiving the PDCCH may refer to receiving other DCI, which is DCI other than the currently detected DCI indicating the BWP handover. The other DCI is also USS DCI.

Further, expiration of the BWP handover time indicated by the DCI indicating the BWP handover may be terminated before handover to the target BWP.

Furthermore, the present embodiment may identify whether effective uplink and downlink scheduling occurs in different scenarios according to the decoding confidence and scheduling conditions of other DCIs on the original BWP, so as to identify the virtual detection DCI indicating BWP switching as far as possible.

In one implementation, referring to fig. 2, the step S101 may include the following steps:

step S1011, judging whether the original BWP is subjected to uplink and downlink scheduling before switching to the target BWP;

if the determination result in step S1011 is yes, that is, uplink and downlink scheduling occurs, step S1012 is executed to determine whether the uplink and downlink scheduling is valid according to the decoding result of the uplink and downlink scheduling.

Specifically, in step S1011, after the DCI indicating the BWP handover is detected, the UE may continuously monitor whether uplink and downlink scheduling still occurs on the original BWP before the BWP handover is actually performed.

The step S1011 may include the steps of: judging whether other DCI is detected in the original BWP before switching to the target BWP; it is determined whether scheduling of data transmission occurs at the original BWP before switching to the target BWP.

Correspondingly, the decoding result of the uplink and downlink scheduling may include whether other DCI is detected, whether decoding of other DCI is successful, whether there is scheduling for receiving the PDSCH, and whether the PDSCH of the original BWP is real and valid.

In a first exemplary application scenario, the step S1012 may include the steps of: if no other DCI is detected in the original BWP before switching to the target BWP, but scheduling of data transmission occurs, receiving the data in the original BWP; and judging whether the uplink and downlink scheduling is effective or not according to the decoding result of the data.

Specifically, the DCI indicating the scheduling of the data transmission may be transmitted in a slot before the DCI indicating the BWP switching is detected.

Further, the data transmission may include a PDSCH and may also include a PUSCH.

If the decoding result of the data indicates that the data is valid, the uplink and downlink scheduling can be determined to be valid. Otherwise, that is, if the decoding result of the data indicates that the data is invalid, it may be determined that the uplink and downlink scheduling is invalid.

For example, the data validity may include at least any of the following: the received PDSCH is valid; and the decoding of other detected DCI is successful.

In this application scenario, before switching to the target BWP, the UE only detects the DCI instructing BWP switching in step S101, but other DCI exists in a previous slot (slot) to indicate that uplink and downlink scheduling exists in a subsequent slot, and a PDSCH and a PUSCH corresponding to the indicated uplink and downlink scheduling are in the middle of BWP switching.

In the example of the scheduling case shown in fig. 3, the UE currently camps on BWP1 and detects DCI indicating BWP handover in the received PDCCH. Assume that the DCI indicating the BWP handover indicates that the target BWP is BWP2, and the time to perform BWP handover is N2 (corresponding upstream) and N0 (corresponding downstream). If the DCI indicating the BWP handover is true and valid, the UE needs to switch to BWP2 to receive PUSCH at BWP2 uplink from the time k 2' that is N2 after detecting the DCI indicating the BWP handover; when time k 0' is equal to N0 since the DCI indicating the BWP handover is detected, the UE needs to switch downlink to BWP2 to receive the PDSCH at BWP 2.

To filter the DCI indicating BWP handover for false detection, the UE performing this embodiment needs to continue to monitor whether valid uplink and downlink scheduling still occurs on BWP1 during k2 'and k 0' described above. In this application scenario, the UE receives other DCI in the time slot before receiving the time slot of the PDCCH to indicate that uplink and downlink scheduling will follow. Assuming that the other DCI indicates that there is a received PDSCH scheduling in the time period k0 ═ 1, (k0 '-1) and a PUSCH scheduling in the time period k2 ═ 1, (k 2' -1), the UE performing the present embodiment may determine that the DCI indicating the BWP handover detected in step S101 is unreliable.

Further, the UE may attempt to continue camping on the original BWP to receive the corresponding PDSCH, and retain the BWP handover information in the DCI indicating the BWP handover detected in step S101.

Further, if the received PDSCH is decoded correctly, the received PDSCH may be confirmed to be valid.

If the Received PDSCH is decoded incorrectly, but the measurement results of the Reference Signal Received Power (RSRP), the Received Signal Strength Indication (RSSI) and the Signal-to-NOISE RATIO (SNR or S/N) of the PDSCH are greater than the respective corresponding threshold values, it can be determined that the Received PDSCH is valid.

Further, if the PDSCH is not received, but other USS DCI is detected and decoding is successful, it can also be confirmed that effective uplink and downlink scheduling occurs in the original BWP.

Therefore, in the application scenario, if the received PDSCH is valid, or other USS DCI is detected and the decoding is successful, the UE determines that the DCI indicating BWP handover is detected virtually, and continues to reside in the original BWP; otherwise, the UE directly switches to the target BWP.

Further, after the handover to the target BWP, the UE may further confirm whether to continue camping on the target BWP according to the scheduling condition of the target cell.

For example, if the DCI indicating the BWP handover detected in step S101 is format (format)1-1, that is, downlink DCI. The UE may receive the PDSCH on the target BWP, and determine whether the BWP handover is reasonable according to the decoding result of the PDSCH and whether the relevant parameters such as RSRP, RSSI, and SNR belong to a reasonable range. If the decoding result of the PDSCH and the parameters are in a reasonable range, the UE confirms that the handover is reasonable and thus continues to camp on the target BWP. If the decoding result of the PDSCH and the parameters are not in the reasonable range, the UE confirms that the switching action is not reasonable, and switches back to the original BWP.

For another example, if the DCI indicating the BWP switching detected in step S101 is format (format)0-1, that is, uplink DCI. The UE may not transmit the PUSCH indicated by the DCI for the moment, but may be in one Hybrid Automatic Repeat reQuest (HARQ) period of the target BWP. If the DCI retransmitting the PUSCH and transmitted by the base station is received in the HARQ period or other USS DCI is detected, the UE may confirm that the handover is reasonable and thus continue to camp on the target BWP. And if the DCI for indicating retransmission of the PUSCH is not received in the HARQ period, the UE is determined to be unreasonable to switch, and the UE is switched back to the original BWP.

In a second exemplary application scenario, the step S1012 may include the steps of: if other DCIs are detected in the original BWP before switching to the target BWP and scheduling of data transmission occurs, comparing the decoding confidence degrees of the other DCIs and the DCI indicating the BWP switching.

And if the decoding confidence degrees of the other DCIs are greater than the decoding confidence degree of the DCI indicating the BWP switching, and the deviation of the other DCIs is greater than a first preset threshold value, determining that the uplink and downlink scheduling is effective.

And if the decoding confidence degrees of the other DCIs are smaller than the decoding confidence degree of the DCI indicating the BWP switching, and the deviation of the other DCIs is larger than the first preset threshold value, determining that the uplink and downlink scheduling is invalid.

And if the deviation between the decoding confidence degrees of the other DCIs and the decoding confidence degree of the DCI indicating the BWP switching is smaller than the first preset threshold, receiving the data at the original BWP, and judging whether the uplink and downlink scheduling is effective according to the decoding result of the data.

Specifically, the data transmission may include a PDSCH and may also include a PUSCH.

Further, the decoding confidence may be characterized based on the signal-to-noise ratio.

In this application scenario, before switching to the target BWP, the UE detects other DCI besides the DCI instructing the BWP handover in step S101, and the corresponding PDSCH and PUSCH are in the middle of the BWP handover.

The other DCIs may include DCI of formats 0-0, DCI of formats 0-1, DCI of formats 1-0, and DCI of formats 1-1.

Taking the scheduling case shown in fig. 4 as an example, the UE currently camps on BWP1 and detects DCI indicating BWP handover in the received PDCCH. Assume that the DCI indicating the BWP handover indicates that the target BWP is BWP2, and the time to perform BWP handover is N2 (corresponding upstream) and N0 (corresponding downstream). If the DCI indicating the BWP handover is true and valid, the UE needs to switch to BWP2 to receive PUSCH at BWP2 uplink from the time k 2' that is N2 after detecting the DCI indicating the BWP handover; when time k 0' is equal to N0 since the DCI indicating the BWP handover is detected, the UE needs to switch downlink to BWP2 to receive the PDSCH at BWP 2.

To filter the DCI indicating BWP handover for false detection, the UE performing this embodiment needs to continue to monitor whether valid uplink and downlink scheduling still occurs on BWP1 during k2 'and k 0' described above. In the present application scenario, the UE detects whether other DCI scheduling the PDSCH is received on BWP1 in time period k0 ═ 1, (k0 '-1) ], and whether other DCI scheduling the PUSCH is received on BWP1 in time period k2 ═ 1, (k 2' -1) ].

Further, assuming that the UE detects other DCIs within the time periods k0 and k2 in the present application scenario, the UE compares the decoding confidence of the other DCIs with the decoding confidence of the DCI indicating BWP switching detected in step S101.

If the decoding confidence of the other DCIs is far greater than that of the DCI indicating the BWP handover, the UE determines that the DCI indicating the BWP handover is detected virtually, and then directly discards the DCI indicating the BWP handover detected in step S101. The decoding confidence of the other DCI is far greater than the decoding confidence of the DCI indicating the BWP switching, which means that the decoding confidence of the other DCI is greater than the decoding confidence of the DCI indicating the BWP switching, and a deviation between the decoding confidence and the DCI indicating the BWP switching is greater than a first preset threshold. The first preset threshold may be 3 decibels (dB for short).

If the decoding confidence of the other DCIs is far less than that of the DCI indicating the BWP switching, the UE determines that the detected DCI indicating the BWP switching is more reliable, and directly discards the other DCIs and tries to switch to the target BWP. Further, after switching to the target BWP, the UE may observe a period of time (i.e. a preset period as described below) at the target BWP, and if the USS DCI or the decoding result of the PDSCH is detected during the period of time to indicate that the PDSCH really exists, the UE may always camp on the target BWP. Conversely, if the UE does not detect any USS DCI all the time (e.g., for a period of time) within the target BWP, or the received PDSCH cannot confirm the true presence, the UE may attempt to actively switch back to the original BWP. Wherein the period of time may be determined according to actual needs, such as being shorter than a duration of a BWP inactivity timer (BWP-inactive timer) indicated in DCI indicating a BWP handover.

If the decoding confidence of the other DCI is equivalent to the decoding confidence of the DCI indicating the BWP handover, the UE may attempt to continue to camp on the original BWP to receive the corresponding PDSCH, and retain the BWP handover information in the DCI indicating the BWP handover detected in step S101.

If the received PDSCH is decoded incorrectly, but the measurement results of measuring RSRP, RSSI, SNR, etc. of the PDSCH are greater than the respective corresponding threshold values, it can be confirmed that the received PDSCH is valid.

For example, if the DCI indicating the BWP handover detected in step S101 is format 1-1, that is, the downlink DCI. The UE may receive the PDSCH on the target BWP, and determine whether the BWP handover is reasonable according to the decoding result of the PDSCH and whether the relevant parameters such as RSRP, RSSI, and SNR belong to a reasonable range. If the decoding result of the PDSCH and the parameters are in a reasonable range, the UE confirms that the handover is reasonable and thus continues to camp on the target BWP. If the decoding result of the PDSCH and the parameters are not in the reasonable range, the UE confirms that the switching action is not reasonable, and switches back to the original BWP.

For another example, if the DCI indicating the BWP handover detected in step S101 is format 0-1, i.e. uplink DCI. The UE may not transmit the PUSCH indicated by the DCI for the moment but stay within one HARQ period of the target BWP. If the DCI retransmitting the PUSCH and transmitted by the base station is received in the HARQ period or other USS DCI is detected, the UE may confirm that the handover is reasonable and thus continue to camp on the target BWP. And if the DCI for indicating retransmission of the PUSCH is not received in the HARQ period, the UE is determined to be unreasonable to switch, and the UE is switched back to the original BWP.

Taking a System Frame Number (SFN) 921 as an example, it is assumed that 2 DCIs are detected in the slot 14. Wherein DCI 1 indicates the original BWP1, k0 ═ 0, and the coding confidence is (0 xffff-0); DCI 2 indicates BWP2, k0 ═ 5, with a coding confidence of (0xffff-0 x15 c). Since the confidence of DCI 2 is much smaller than DCI 1, the UE may directly discard DCI 2.

The first application scenario and the second application scenario both monitor uplink and downlink scheduling with or without USS during the period from detection of DCI instructing BWP handover to actual execution of handover. The difference between the two scenarios is that the first application scenario can complete the determination of whether uplink and downlink scheduling is valid or not upon detecting the current time slot of DCI indicating BWP handover, while the second application scenario needs more time slots to determine.

In a third exemplary application scenario, if only the DCI indicating BWP handover detected in step S101 is detected before performing BWP handover, and the following slot has no scheduling for PDSCH reception and PUSCH transmission, it may be determined that effective uplink and downlink scheduling has not occurred. At this time, the UE may attempt handover to the target BWP.

Since the scheduling condition of the target cell can also be used as the determination of BWP handover rationality, in the present application scenario, the processing logic of the UE after handover to the target BWP is further rationalized according to the decoding confidence level of the DCI indicating BWP handover.

In a first specific embodiment of the third application scenario, if the decoding confidence of the DCI indicating the BWP handover is greater than or equal to the second preset threshold, the DCI indicating the BWP handover may be considered to have higher reliability. Accordingly, the UE directly switches to the target BWP.

Specifically, the specific value of the second preset threshold may be set according to the simulation result when the UE leaves the factory.

Further, after performing step S102 to switch to the target BWP, the UE may further perform the steps of: judging whether DCI or an effective PDSCH is received in the target BWP within a preset period; if the DCI and the effective PDSCH are not received in the preset period, switching back to the original BWP; and if the DCI or the effective PDSCH is received in the preset period, continuing to reside in the target BWP.

Further, the preset period may be shorter than a duration of a BWP inactivity timer, wherein the BWP inactivity timer is indicated by the DCI indicating a BWP handover.

Further, receiving the DCI at the target BWP may refer to detecting the DCI of the USS.

Further, a valid PDSCH may mean that the PDSCH is correctly decoded. Or the measurement result of measuring parameters such as RSRP, RSSI and SNR of the PDSCH is larger than the threshold value although the PDSCH is decoded incorrectly.

In a second embodiment of the third application scenario, if the decoding confidence of the DCI indicating the BWP handover is smaller than a second preset threshold, the DCI indicating the BWP handover may be considered to have unreliability. Accordingly, the UE may first attempt handover to the target BWP and then determine the next processing logic according to the specific type of DCI indicating the BWP handover.

For example, if the DCI instructing the BWP handover is downlink DCI (e.g., DCI of format 1-1), after performing step S102 to handover to the target BWP, the UE may further perform the steps of: receiving and decoding a PDSCH at the target BWP; if the decoding result shows that the PDSCH is effective, continuing residing in the target BWP; and if the decoding result shows that the PDSCH is invalid, switching back to the original BWP.

PDSCH valid may mean that the decoding of PDSCH is correct. Or the measurement result of measuring parameters such as RSRP, RSSI and SNR of the PDSCH is larger than the threshold value although the PDSCH is decoded incorrectly.

For another example, if the DCI instructing the BWP handover is an uplink DCI (e.g., DCI of format 0-1), after performing step S102 to handover to the target BWP, the UE may further perform the steps of: suspending PUSCH transmission at the target BWP; if DCI indicating PUSCH retransmission is received in a HARQ period or other DCI is detected, continuing residing in the target BWP; and if the DCI indicating the PUSCH retransmission is not received or other DCIs are detected after the HARQ period is exceeded, switching back to the original BWP. Wherein, the other DCI may be DCI of other USS.

In a specific implementation, during the execution of the above three application scenarios, the processing method according to this embodiment may further include the steps of: and immediately switching to the target BWP if the DCI indicating the switching to the target BWP is received again before the switching to the target BWP.

Specifically, if during execution of the above three application scenarios, DCI indicating a switch to the same target BWP is detected again, then the switch to the target BWP can be made unconditionally at this time without any additional judgment.

In one specific implementation, in response to detecting DCI indicating BWP switching, before performing the determining step in step S101, the processing method in this embodiment may further include the steps of: performing validity detection on at least part of bit fields of the DCI for indicating BWP switching; if the validity detection is passed, whether effective uplink and downlink scheduling occurs in the original BWP before switching to the target BWP is judged.

Thus, the probability of the UE falsely detecting the DCI instructing the BWP handover is further reduced by the double judgment.

Thus, by adopting the embodiment, the DCI for instructing BWP handover, which is falsely detected, is identified as far as possible by combining the detection of the subsequent scheduling condition on the original BWP after instructing BWP handover, so as to ensure that the UE and the base station are in the same BWP and ensure the communication quality. Specifically, in conjunction with the protocol description, it may be determined that, during the handover of the UE to the target BWP after the BWP handover is indicated, the base station may not perform uplink and downlink scheduling on the UE on the original BWP in principle. Therefore, whether the DCI for indicating the BWP switching is real and effective can be accurately judged by monitoring whether the uplink and downlink scheduling still exists on the original BWP after the DCI for indicating the BWP switching is detected.

The scheme of the invention can effectively improve the problem that the UE and the base station are out of contact when the BWP is directly switched after the UE falsely detects the DCI indicating the BWP switching, and can also reserve the integrity of scheduling to the greatest extent.

Fig. 5 is a schematic structural diagram of a processing apparatus for BWP handover indication according to an embodiment of the present invention. Those skilled in the art understand that the processing device 5 for BWP handover indication according to this embodiment may be used to implement the method solutions described in the embodiments of fig. 1 to 4.

Specifically, referring to fig. 5, the processing device 5 for the BWP switching indication according to this embodiment may include: a determining module 51, configured to determine, in response to detecting DCI indicating BWP handover, whether effective uplink and downlink scheduling occurs in an original BWP before handover to a target BWP; the switching module 52, if the determination result indicates that no effective uplink and downlink scheduling occurs, switches to the target BWP.

For more details of the operation principle and the operation mode of the processing apparatus 5 for the BWP switching indication, reference may be made to the description in fig. 1 to 4, and details are not repeated here.

In a specific implementation, the processing device for the BWP switching indication may correspond to a Chip having a BWP switching function in the ue, or correspond to a Chip having a data processing function, such as a System-On-a-Chip (SOC), a baseband Chip, or the like; or the user equipment comprises a chip module with a BWP switching function chip; or to a chip module having a chip with data processing function, or to a user equipment.

In a specific implementation, each module/unit included in each apparatus and product described in the foregoing embodiments may be a software module/unit, may also be a hardware module/unit, or may also be a part of a software module/unit and a part of a hardware module/unit.

For example, for each device or product applied to or integrated into a chip, each module/unit included in the device or product may be implemented by hardware such as a circuit, or at least a part of the module/unit may be implemented by a software program running on a processor integrated within the chip, and the rest (if any) part of the module/unit may be implemented by hardware such as a circuit; for each device or product applied to or integrated with the chip module, each module/unit included in the device or product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules/units may be implemented by using a software program running on a processor integrated within the chip module, and the rest (if any) of the modules/units may be implemented by using hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by using hardware such as a circuit.

Embodiments of the present invention further provide a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the processing method for BWP switching indication provided in any of the above embodiments. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The storage medium may include ROM, RAM, magnetic or optical disks, etc.

Another processing apparatus for a BWP handover indication according to an embodiment of the present invention includes a memory and a processor, where the memory stores a computer program executable on the processor, and the processor executes the steps of the processing method for a BWP handover indication according to the corresponding embodiments of fig. 1 to 4 when executing the computer program.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.

The technical scheme of the invention can be suitable for 5G (5generation) communication systems, 4G and 3G communication systems, and various communication systems of subsequent evolution, such as 6G, 7G and the like.

The technical solution of the present invention is also applicable to different network architectures, including but not limited to relay network architecture, dual link architecture, and Vehicle-to-event architecture.

The 5G CN in the embodiment of the present application may also be referred to as a new core (new core), a 5G new core, a Next Generation Core (NGC), or the like. The 5G-CN is set independently of an existing core network, such as an Evolved Packet Core (EPC).

A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a radio access network to provide a wireless communication function. For example, the device providing the base station function in the 2G network includes a Base Transceiver Station (BTS) and a Base Station Controller (BSC), the device providing the base station function in the 3G network includes a node B (NodeB) and a Radio Network Controller (RNC), the device providing the base station function in the 4G network includes an evolved node B (eNB), the device providing the base station function in the Wireless Local Area Network (WLAN) is an Access Point (AP), the device providing the base station function in the 5G New Radio (New Radio, NR) includes a node B (gnb) that continues to evolve, and the device providing the base station function in a New communication system in the future, and the like.

A terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal equipment), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

In the embodiment of the application, a unidirectional communication link from an access network to a terminal is defined as a downlink, data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called as a downlink direction; the unidirectional communication link from the terminal to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is referred to as an uplink direction.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.

The "plurality" appearing in the embodiments of the present application means two or more.

The descriptions of the first, second, etc. appearing in the embodiments of the present application are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present application, and do not constitute any limitation to the embodiments of the present application.

The term "connect" in the embodiments of the present application refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this embodiment of the present application. In the embodiments of the present application, "network" and "system" represent the same concept, and a communication system is a communication network.

It should be understood that, in the embodiment of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for processing a BWP handoff indication, comprising:

in response to detecting the DCI indicating the BWP handover, judging whether effective uplink and downlink scheduling occurs in the original BWP before the handover to the target BWP;

and if the judgment result shows that effective uplink and downlink scheduling does not occur, switching to the target BWP.

2. The processing method of claim 1, further comprising:

and if the judgment result shows that the effective uplink and downlink scheduling occurs, continuing to reside in the original BWP.

3. The processing method according to claim 1 or 2, further comprising:

and immediately switching to the target BWP if the DCI indicating the switching to the target BWP is received again before the switching to the target BWP.

4. The processing method according to claim 1, wherein the determining whether effective uplink and downlink scheduling occurs at the original BWP before switching to the target BWP comprises:

judging whether uplink and downlink scheduling occurs in the original BWP before switching to the target BWP;

and if the judgment result shows that the uplink and downlink scheduling occurs, judging whether the uplink and downlink scheduling is effective according to the decoding result of the uplink and downlink scheduling.

5. The processing method according to claim 4, wherein the determining whether uplink and downlink scheduling occurs at the original BWP before switching to the target BWP comprises:

judging whether other DCI is detected in the original BWP before switching to the target BWP;

it is determined whether scheduling of data transmission occurs at the original BWP before switching to the target BWP.

6. The processing method according to claim 4, wherein said determining whether the uplink and downlink scheduling is valid according to the decoding result of the uplink and downlink scheduling comprises:

if no other DCI is detected in the original BWP before switching to the target BWP, but scheduling of data transmission occurs, receiving the data in the original BWP;

and judging whether the uplink and downlink scheduling is effective or not according to the decoding result of the data.

7. The processing method of claim 6, wherein the DCI indicating the scheduling of the data transmission is transmitted in a slot prior to detection of the DCI indicating the BWP switch.

8. The processing method according to claim 4, wherein said determining whether the uplink and downlink scheduling is valid according to the decoding result of the uplink and downlink scheduling comprises:

if other DCI is detected in the original BWP before switching to the target BWP and scheduling of data transmission occurs, comparing the decoding confidence degrees of the other DCI and the DCI indicating the BWP switching;

if the decoding confidence of the other DCIs is greater than the decoding confidence of the DCI indicating the BWP switching, and the deviation of the other DCIs is greater than a first preset threshold, determining that the uplink and downlink scheduling is effective;

if the decoding confidence of the other DCIs is smaller than the decoding confidence of the DCI indicating the BWP switching, and the deviation of the other DCIs is larger than the first preset threshold, determining that the uplink and downlink scheduling is invalid;

9. The processing method according to claim 6 or 8, wherein said determining whether the uplink and downlink scheduling is valid according to the decoding result of the data comprises:

if the decoding result of the data indicates that the data is valid, determining that the uplink and downlink scheduling is valid; and if the decoding result of the data indicates that the data is invalid, determining that the uplink and downlink scheduling is invalid.

10. The processing method according to claim 9, wherein the data validity includes at least any one of: the received PDSCH is valid; and the decoding of other detected DCI is successful.

11. The processing method according to claim 1, further comprising, after switching to the target BWP:

judging whether DCI or an effective PDSCH is received in the target BWP within a preset period;

if the DCI and the effective PDSCH are not received in the preset period, switching back to the original BWP;

and if the DCI or the effective PDSCH is received in the preset period, continuing to reside in the target BWP.

12. The processing method according to claim 11, wherein the decoding confidence of the DCI indicating the BWP handover is greater than or equal to a second preset threshold.

13. The processing method according to claim 11, wherein the preset period is shorter than a duration of a BWP inactivity timer, wherein the BWP inactivity timer is indicated by the DCI indicating a BWP switch.

14. The processing method according to claim 1, wherein if the DCI instructing the BWP handover is downlink DCI, after the handover to the target BWP, the method further comprises:

receiving and decoding a PDSCH at the target BWP;

if the decoding result shows that the PDSCH is effective, continuing residing in the target BWP;

and if the decoding result shows that the PDSCH is invalid, switching back to the original BWP.

15. The processing method according to claim 1, wherein if the DCI indicating the BWP handover is an uplink DCI, after the handover to the target BWP, the method further comprises:

suspending PUSCH transmission at the target BWP;

if DCI indicating PUSCH retransmission is received in a HARQ period or other DCI is detected, continuing residing in the target BWP;

and if the DCI indicating the PUSCH retransmission is not received or other DCIs are detected after the HARQ period is exceeded, switching back to the original BWP.

16. The processing method according to claim 14 or 15, wherein the decoding confidence of the DCI indicating the BWP handover is smaller than a second preset threshold.

17. The processing method according to claim 1, wherein the DCI is USSDCI.

18. The processing method according to claim 1, before determining whether effective uplink and downlink scheduling occurs at the original BWP before switching to the target BWP, further comprising:

performing validity detection on at least part of bit fields of the DCI for indicating BWP switching;

if the validity detection is passed, whether effective uplink and downlink scheduling occurs in the original BWP before switching to the target BWP is judged.

19. A processing apparatus for a BWP switch indication, comprising:

the judging module is used for responding to the detection of the DCI indicating the BWP switching, and judging whether effective uplink and downlink scheduling occurs in the original BWP before the switching to the target BWP;

and the switching module is used for switching to the target BWP if the judgment result shows that the effective uplink and downlink scheduling does not occur.

20. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having a computer program stored thereon, the computer program, when being executed by a processor, performing the steps of the method according to any one of the claims 1 to 18.

21. A processing apparatus for BWP handover indication, comprising a memory and a processor, said memory having stored thereon a computer program being executable on said processor, characterized in that said processor, when executing said computer program, is adapted to perform the steps of the method according to any of the claims 1 to 18.