Method and device for determining bandwidth

Abstract

The present application provides a method and apparatus for determining bandwidth, which can eliminate the risk of uplink interference leakage. The method includes: when a terminal device is not scheduled, a network device measures a first signal power within a first bandwidth range; when the terminal device is scheduled within a second bandwidth range, the network device measures a second signal power within the second bandwidth range and measures a third signal power within the first bandwidth range, wherein the first bandwidth range and the second bandwidth range do not overlap; the network device determines an adjacent channel leakage ratio (ACLR) within the first bandwidth range based on the first signal power, the second signal power, and the third signal power; when the ACLR is greater than a preset threshold, the network device narrows the second bandwidth range.

Description

Technical Field

[0001] The present application relates to the field of communications, and more particularly, to a method and apparatus for determining bandwidth. Background Art

[0002] Currently, the spectrum resources held by some operators are irregular for current mainstream communication systems, such as long-term evolution (LTE) and fifth-generation (5G) systems. That is, the bandwidth resources are not a combination of optional bandwidths defined by the protocol. This problem is particularly prominent in low-frequency bands.

[0003] To fully utilize irregular, discontinuous spectrum, customized solutions have been introduced. These solutions round up irregular spectrum, merge it into larger bandwidths, and perform related scheduling. In the downlink, these customized solutions typically mitigate the risk of out-of-band leakage by adding downlink filters at the base station. However, in the uplink, since the transmitter is at the terminal, adding filters to control out-of-band leakage is not possible. Therefore, current customized solutions merely inform operators of the risk of uplink out-of-band leakage and do not actually address it. Summary of the Invention

[0004] The present application provides a method and apparatus for determining bandwidth, which can eliminate the risk of uplink interference leakage.

[0005] In a first aspect, a method for determining bandwidth is provided, comprising: when a terminal device is not scheduled, the network device measures a first signal power within a first bandwidth range; when the terminal device is scheduled within a second bandwidth range, the network device measures a second signal power within the second bandwidth range, and measures a third signal power within the first bandwidth range, wherein the first bandwidth range and the second bandwidth range do not overlap; the network device determines an adjacent channel leakage ratio (ACLR) within the first bandwidth range based on the first signal power, the second signal power, and the third signal power; when the ACLR is greater than a preset threshold, the network device narrows the second bandwidth range; when the ACLR is less than or equal to the preset threshold, the network device expands the second bandwidth range.

[0006] In the above technical solution, the network equipment can determine whether there is a risk of uplink interference leakage when the terminal device is scheduled by measuring the adjacent channel leakage ratio; if there is a risk of uplink interference leakage, the bandwidth scheduled by the terminal device is reduced, thereby eliminating the risk of uplink interference leakage.

[0007] In one implementation, before scheduling the terminal device within the second bandwidth range, the method further includes: the network device sending a first message to the terminal device, where the first message is used to indicate that the terminal device is to be scheduled within the second bandwidth range.

[0008] In one implementation, the network device measures the second signal power within the second bandwidth range, including: the network device measures the fourth signal power corresponding to at least one frequency point, wherein the at least one frequency point is a frequency point within the second bandwidth range; the network device takes the average of the fourth signal power corresponding to the at least one frequency point to obtain the second signal power.

[0009] In one implementation, the network device determines an adjacent channel leakage ratio (ACLR) within the first bandwidth based on the first signal power, the second signal power, and the third signal power, including determining the ACLR according to the following formula:

[0010]

[0011] Here, z is the third signal power, x is the first signal power, and y is the second signal power.

[0012] In a second aspect, a communication device is provided, comprising: a measuring unit for measuring a first signal power within a first bandwidth range when a terminal device is not scheduled; the measuring unit is further configured to measure a second signal power within the second bandwidth range and a third signal power within the first bandwidth range when the terminal device is scheduled within a second bandwidth range, wherein the first bandwidth range does not overlap with the second bandwidth range; a processing unit for determining an adjacent channel leakage ratio (ACLR) within the first bandwidth range based on the first signal power, the second signal power, and the third signal power; the processing unit is further configured to reduce the second bandwidth range when the ACLR is greater than a preset threshold; and the network device expands the second bandwidth range when the ACLR is less than or equal to the preset threshold. In one implementation, the device further comprises: a sending unit for sending a first message to the terminal device, the first message being used to indicate that the terminal device is scheduled within the second bandwidth range.

[0013] In one implementation, the measurement unit is specifically used to: measure the fourth signal power corresponding to at least one frequency point, wherein the at least one frequency point is a frequency point within the second bandwidth; and take the average of the fourth signal power corresponding to the at least one frequency point to obtain the second signal power.

[0014] In one implementation, the processing unit is specifically configured to determine the ACLR according to the following formula:

[0015]

[0016] Here, z is the third signal power, x is the first signal power, and y is the second signal power.

[0017] In a third aspect, a communication device is provided, comprising: a processor and a transceiver, wherein the transceiver is used to receive computer code or instructions and transmit them to the processor, and the processor executes the computer code or instructions, such as the method in the first aspect or any possible implementation of the first aspect.

[0018] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable medium stores a computer program; when the computer program runs on a computer, the computer executes the method in the first aspect or any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of uplink interference leakage.

[0020] Figure 2 This is a schematic flowchart of a method for determining bandwidth according to an embodiment of the present application.

[0021] Figure 3 A bandwidth distribution diagram of an embodiment of the present application.

[0022] Figure 4 This is a schematic block diagram of a communication device according to an embodiment of the present application.

[0023] Figure 5 This is a schematic block diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] The technical solution in this application will be described below with reference to the accompanying drawings.

[0025] The embodiments of the present application can be applied to various communication systems, such as wireless local area network (WLAN), narrowband Internet of Things (NB-IoT), global system for mobile communications (GSM), enhanced data rate for GSM evolution (EDGE), wideband code division multiple access (WCDMA), code division multiple access 2000 (CDMA2000), time division-synchronization code division multiple access (TD-SCDMA), long term evolution (LTE), satellite communication, fifth generation (5G) system or new communication systems that will appear in the future.

[0026] The terminal devices involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem. The terminal may be a mobile station (MS), a subscriber unit (subscriber unit), a user equipment (UE), a cellular phone, a smart phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a wireless modem, a handheld device (handset), a laptop computer, a machine type communication (MTC) terminal, etc.

[0027] For various reasons, some operators hold spectrum resources that are irregular for current mainstream wireless standards, such as LTE and New Radio (NR). This means that bandwidth resources do not represent a combination of optional bandwidths defined by the protocols. This problem is particularly prominent in low-frequency bands, particularly the 900 MHz band. One reason is that the low-frequency 900 MHz spectrum offers excellent deep coverage, but limited allocable resources. Another reason is that the 900 MHz band was historically the mainstream frequency band for GSM, a narrowband (200 kHz / 180 kHz) system with flexible bandwidth configuration and few constraints on bandwidth resource allocation. Furthermore, it was impossible to foresee the bandwidth requirements of subsequent evolving standards during allocation. Consequently, spectrum irregularity is common in 900 MHz spectrum resources for new mainstream standards like LTE and NR. Furthermore, the actual support for carrier aggregation by terminals, particularly the low percentage of terminals that support more than two low-frequency carriers, further exacerbates the impact of spectrum irregularity.

[0028] To fully utilize irregular, discontinuous spectrum, the industry has introduced a number of customized solutions that round up irregular spectrum, merge it into larger bandwidths, and perform related scheduling. These customized solutions typically mitigate downlink risks by adding downlink filters at the base station to control downlink out-of-band (here, the out-of-band corresponding to the operator's bandwidth resources, not the out-of-band of the configured bandwidth). However, in the uplink, since the transmitter is at the terminal, adding filters to control out-of-band leakage is not possible. Therefore, current customized solutions merely inform operators of the uplink risk and do not actually resolve the problem.

[0029] like Figure 1 Figure 1 shows a schematic diagram of out-of-band leakage. For example, if the operator allocates 8 Mbps bandwidth (meaning the operator allows a terminal to use 8 Mbps), and the terminal's configured bandwidth is 10 Mbps, interference leakage may occur within the 8 to 10 Mbps range due to the signal attenuation characteristics of orthogonal frequency division multiplexing (OFDM).

[0030] To this end, an embodiment of the present application proposes a method for determining bandwidth, which can determine the uplink scheduling bandwidth by detecting uplink interference leakage, so as to eliminate the risk of uplink interference leakage.

[0031] like Figure 2 As shown, a schematic flow chart of a bandwidth determination method 200 according to an embodiment of the present application is shown.

[0032] 210. When the terminal device is not scheduled, the network device measures the first signal power within a first bandwidth range. The first signal power can be understood as the first noise floor power. The first bandwidth range is the bandwidth range in which the adjacent channel leakage ratio (ACLR) needs to be measured, that is, the bandwidth range / spectrum resource that will not be used by the terminal device during signal transmission.

[0033] 220. When scheduling the terminal device within the second bandwidth range, the network device measures the second signal power within the second bandwidth range and measures the third signal power within the first bandwidth range. The second bandwidth range is the bandwidth range / spectrum resource used by the terminal device in sending signals. The first bandwidth range does not overlap with the second bandwidth range. In other words, the frequency corresponding to the frequency point within the first bandwidth range is greater than the frequency corresponding to the frequency point within the second bandwidth range, and / or the frequency corresponding to the frequency point within the first bandwidth range is less than the frequency corresponding to the frequency point within the second bandwidth range. It should be understood that the first bandwidth range may be adjacent to the second bandwidth range, or the first bandwidth range may not be adjacent to the second bandwidth range.

[0034] The second signal power may be a reference signal receiving power (RSRP), and the third signal power may be understood as a second noise floor power.

[0035] like Figure 3 As shown, the configured bandwidth of a terminal device is divided into three regions: A, B, and C. The allocated bandwidth includes two regions: A and B. Regions A and B represent spectrum resources owned by an operator, meaning they are the bandwidth that the operator can legally schedule for use. Region C represents spectrum resources owned by other operators. It is necessary to ensure that the interference leakage caused by the use of spectrum resources in regions A and B into region C meets protocol requirements. Since it is impossible to detect leakage during the use of allocated bandwidth within the bandwidth of other operators (region C), several resource blocks (RBs) are reserved within the allocated bandwidth of this operator as non-scheduling protection bandwidth, i.e., the protection bandwidth region is region B. The signal attenuation amplitude in region B is detected to determine whether interference leakage meets protocol requirements. Region A is the scheduled region for the terminal device, i.e., the second bandwidth range; region B is the non-scheduled region, i.e., the first bandwidth range. By detecting the signal attenuation amplitude in region B, the protection bandwidth is dynamically adjusted to ensure that out-of-band leakage meets protocol requirements. It should be understood that if the interference leakage in region B meets protocol requirements, interference leakage in region C can be prevented.

[0036] Optionally, before the terminal device is scheduled within the second bandwidth range, the network device sends a first message to the terminal device, where the first message is used to indicate that the terminal device is to be scheduled within the second bandwidth range; the terminal device receives the first message and sends a signal to the network device within the second bandwidth range according to the first message.

[0037] When scheduling a terminal device within the second bandwidth, the network device may measure, within the second bandwidth, only the fourth signal power corresponding to one frequency point, where the fourth signal power is the measured second signal power, where the fourth signal power may be RSRP. Optionally, the network device may measure the fourth signal power corresponding to multiple frequency points, where the multiple frequency points are within the second bandwidth, and the network device may average the fourth signal powers corresponding to the multiple frequency points to obtain the second signal power.

[0038] It should be understood that when the network device measures the fourth signal power corresponding to multiple frequency points, the network device may also remove the maximum power value and the minimum power value from the fourth signal power corresponding to the multiple frequency points, and then average the remaining fourth signal powers to obtain the second signal power. This embodiment of the present application does not impose any limitation on this.

[0039] 230. The network device determines an adjacent channel leakage ratio (ACLR) within a first bandwidth based on the first signal power, the second signal power, and the third signal power. The ACLR can be understood as a signal attenuation amplitude. Specifically, the ACLR is calculated as:

[0040]

[0041] Wherein, z is the third signal power, x is the first signal power, and y is the second signal power. 240. If the ACLR is greater than a preset threshold, the network device reduces the second bandwidth range.

[0042] Optionally, if the ACLR is less than or equal to a preset threshold, the network device may expand the second bandwidth range. The network device may also not change the second bandwidth range, which is not limited in this application.

[0043] If the configured bandwidth range of a terminal device is 0-5M, and the bandwidth range that an operator can legally schedule is 0-4M, then the spectrum resources within the range of 4-5M are owned by other operators. To prevent interference leakage within the range of 4-5M, the network device instructs the terminal device to schedule spectrum resources that are less than 4M. For example, if the network device indicates that the bandwidth range for scheduling a terminal device is 0-3M, then when the terminal device is not scheduled, the network device measures the first signal power within the range of 3M-4M. When the terminal device is scheduled, the terminal device uses the spectrum resources within the range of 0-3M to send a signal to the network device. In this case, the second bandwidth range is 0-3M and the first bandwidth range is 3M-4M. The network device measures the second signal power within the range of 0-3M and the third signal power within the first bandwidth. The network device then calculates the ACLR within the first bandwidth based on the measured first, second, and third signal powers. If the ACLR is greater than the preset threshold, the network device may narrow the range of the second bandwidth, for example, the range of the second bandwidth may be narrowed to 0-2.5M, and the terminal device may be instructed to be scheduled within the range of 0-2.5M. At the same time, the ACLR within the range of 2.5M-4M is measured until the latest measured ACLR meets the preset threshold. If the ACLR is less than or equal to the preset threshold, the network device may expand the range of the second bandwidth, for example, the range of the second bandwidth may be expanded to 0-3.5M, and the terminal device may be instructed to be scheduled within the range of 0-3.5M. At the same time, the ACLR within the range of 3.5M-4M is measured until the latest measured ACLR meets the preset threshold. It should be understood that the preset threshold may be a protocol requirement or a value that is more stringent than the protocol requirement, and this application does not impose any limitation on this.

[0044] Specifically, the optional expansion or reduction of the second bandwidth can be adjusted in RB units. It can also be cell-level or user-level. Cell-level refers to adaptively adjusting the uplink schedulable bandwidth of the entire cell as soon as a terminal device is detected to not meet ACLR requirements. User-level refers to adjusting the uplink schedulable bandwidth based on different types of terminal devices, requiring identification of the terminal type.

[0045] The technical solution provided in the embodiment of the present application enables the network device to determine whether there is a risk of uplink interference leakage when the terminal device is scheduled by measuring the adjacent channel leakage ratio; if there is a risk of uplink interference leakage, the bandwidth scheduled for the terminal device is reduced, thereby eliminating the risk of uplink interference leakage.

[0046] The embodiment of the present application proposes a communication device 400, such as Figure 4 FIG. 4 is a schematic block diagram of a communication device 400 according to an embodiment of the present application. The communication device may be implemented Figure 2The components of the method in the embodiment, such as a chip. The communication device 400 includes:

[0047] The measuring unit 410 is configured to measure the first signal power within the first bandwidth when the terminal device is not scheduled;

[0048] The measuring unit 410 is further configured to, when scheduling the terminal device within the second bandwidth range, measure the second signal power within the second bandwidth range, and measure the third signal power within the first bandwidth range, wherein the first bandwidth range and the second bandwidth range do not overlap;

[0049] a processing unit 420, configured to determine an adjacent channel leakage ratio (ACLR) within the first bandwidth according to the first signal power, the second signal power, and the third signal power;

[0050] The processing unit 420 is further configured to, when the ACLR is greater than a preset threshold, reduce the second bandwidth range; and when the ACLR is less than or equal to the preset threshold, expand the second bandwidth range.

[0051] Optionally, the apparatus further includes: a sending unit, configured to send a first message to the terminal device, wherein the first message is used to indicate that the terminal device is to be scheduled within the second bandwidth range.

[0052] Optionally, the measuring unit 410 is specifically used to: measure the fourth signal power corresponding to at least one frequency point, wherein the at least one frequency point is a frequency point within the second bandwidth; and average the fourth signal power corresponding to the at least one frequency point to obtain the second signal power.

[0053] Optionally, the processing unit 420 is specifically configured to determine ACLR according to the following formula:

[0054]

[0055] Wherein, z is the third signal power, x is the first signal power, and y is the second signal power.

[0056] The embodiment of the present application provides a communication device 500, such as Figure 5 As shown, a schematic block diagram of a communication device 500 according to an embodiment of the present application is shown. The communication device 500 includes: a processor 510 and a transceiver 520, wherein the transceiver 520 is configured to receive computer codes or instructions and transmit the instructions to the processor 510, and the processor 510 executes the computer codes or instructions to implement the method according to the embodiment of the present application. The communication device may be a device for implementing Figure 2 The network device in the method embodiment.

[0057] The processor 510 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above-described method embodiment may be completed by hardware integrated logic circuits in the processor or by software instructions. The processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. The methods, steps, and logic block diagrams disclosed in the embodiments of this application may be implemented or executed. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of this application may be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. The storage medium is located in a memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above-described method.

[0058] The present application also provides a computer-readable storage medium storing a computer program for implementing the method in the above method embodiment. When the computer program is executed on a computer, the computer can implement the method in the above method embodiment.

[0059] In addition, the character " / " in this application generally indicates that the objects before and after are in an "or" relationship; the term "at least one" in this application can mean "one" and "two or more", for example, at least one of A, B and C can mean: A exists alone, B exists alone, C exists alone, A and B exist at the same time, A and C exist at the same time, C and B exist at the same time, and A, B and C exist at the same time. These seven situations.

[0060] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0061] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0063] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0064] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0065] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0066] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for determining bandwidth, characterized in that: include: When the terminal device is not scheduled, the network device measures the first signal power within the first bandwidth; When scheduling the terminal device within a second bandwidth range, the network device measures a second signal power within the second bandwidth range and measures a third signal power within the first bandwidth range, wherein the first bandwidth range does not overlap with the second bandwidth range; The network device determines an adjacent channel leakage ratio (ACLR) within the first bandwidth according to the first signal power, the second signal power, and the third signal power; When the ACLR is greater than a preset threshold, the network device reduces the second bandwidth range; When the ACLR is less than or equal to the preset threshold, the network device expands the second bandwidth range.

2. The method according to claim 1, characterized in that The method further comprises: The network device sends a first message to the terminal device, where the first message is used to instruct the terminal device to be scheduled within the second bandwidth range.

3. The method according to claim 1 or 2, characterized in that Measuring, by the network device, the second signal power within the second bandwidth range, including: The network device measures a fourth signal power corresponding to at least one frequency point, wherein the at least one frequency point is a frequency point within the second bandwidth; The network device averages the fourth signal powers corresponding to the at least one frequency point to obtain the second signal power.

4. The method according to claim 1 or 2, characterized in that The network device determines an adjacent channel leakage ratio (ACLR) within the first bandwidth according to the first signal power, the second signal power, and the third signal power, including determining the ACLR according to the following formula: Here, z is the third signal power, x is the first signal power, and y is the second signal power.

5. A communication device, characterized in that: include: a measuring unit, configured to measure a first signal power within a first bandwidth when the terminal device is not scheduled; The measuring unit is further configured to, when scheduling the terminal device within a second bandwidth range, measure a second signal power within the second bandwidth range, and measure a third signal power within the first bandwidth range, wherein the first bandwidth range and the second bandwidth range do not overlap; a processing unit, configured to determine an adjacent channel leakage ratio (ACLR) within the first bandwidth according to the first signal power, the second signal power, and the third signal power; The processing unit is further configured to, when the ACLR is greater than a preset threshold, reduce the second bandwidth range, and when the ACLR is less than or equal to the preset threshold, expand the second bandwidth range.

6. The device according to claim 5, characterized in that The device further comprises: A sending unit is used to send a first message to the terminal device, where the first message is used to indicate that the terminal device is scheduled within the second bandwidth range.

7. The device according to claim 5 or 6, characterized in that The measuring unit is specifically used for: measuring a fourth signal power corresponding to at least one frequency point, wherein the at least one frequency point is a frequency point within the second bandwidth; An average of the fourth signal powers corresponding to the at least one frequency point is taken to obtain the second signal power.

8. The device according to claim 5 or 6, characterized in that The processing unit is specifically configured to determine the ACLR according to the following formula: Here, z is the third signal power, x is the first signal power, and y is the second signal power.

9. A communication device, characterized in that: include: A processor and a transceiver, wherein the transceiver is configured to receive computer codes or instructions and transmit the computer codes or instructions to the processor, and the processor executes the computer codes or instructions, according to the method according to any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that include: The computer readable medium stores a computer program; When the computer program is run on a computer, the computer is caused to execute the method according to any one of claims 1 to 4.

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