Control channel based on 5G standard waveform and channel parameter calculation method

Abstract

The invention discloses a control channel and parameter acquisition method based on a 5G standard waveform. Relates to the technical field of wireless communication. On the basis of an existing control channel, the control channel is improved, a control resource set supporting multiple types is configured, the control resource set is defined to occupy one or more time domain symbols and support processing of multiple control channels, and each control channel supports carrying multiple pieces of control information. The improved control channel can adaptively select a time-frequency position according to interference and fading in different interference and fading scenes so as to avoid the frequency domain position of interference and fading, so that a communication system has better performance; according to the scheme, parameters such as time-frequency resources and aggregation levels of the control channel are calculated according to the synchronous channel, and the scheduling flexibility is improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular to a control channel and a channel parameter calculation method based on a 5G standard waveform. Background Art

[0002] In the field of wireless communication applications, overcoming the impact of wireless channels is one of the most critical issues in wireless communication technology. Interference and fading in wireless channels are two key factors affecting wireless communication performance. Interference and fading can significantly impact signal transmission quality, communication reliability, and system capacity, leading to problems such as increased bit error rates, degraded signal quality, communication interruptions, reduced spectrum efficiency, a degraded user experience, limited coverage, and reduced system performance.

[0003] The 5G-NR waveform system and the evolved waveform system based on 5G-NR support a wide frequency range from low frequency bands to millimeter wave bands. Its operating bandwidth is relatively wide. For the SUB6 band, it can support an operating bandwidth of up to 100 MHz. Therefore, the impact of interference and fading on the 5G-NR waveform system is very significant.

[0004] In the standard waveform system definition of 5G-NR, the control channel (PCCH) is defined. Since the candidate frequency domain positions of the control channel are basically determined when the user accesses the network, that is, the positions of the control channel are fixed to several candidate positions. This can solve a certain degree of interference and fading. However, whether it is for fixed deployment scenarios of base stations (that is, the base station site planning is fixed and unchanged) or for mobile deployment scenarios of base stations (that is, the base station site planning is uncertain), especially for military application scenarios and emergency communication scenarios, it cannot effectively cope with the impact of interference and fading, especially time-varying interference and fading. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: in the 5G standard waveform system, interference and fading have a great impact on the system, especially for militarized application scenarios and emergency communication scenarios, the impact of time-varying interference and fading is more significant; the purpose of the present invention is to provide a control channel and channel parameter calculation method based on the 5G standard waveform. On the basis of the existing control channel, the control channel itself is improved, and the configuration supports multiple types of control resource sets. The control resource set is defined as occupying one or more time domain symbols, supporting the processing of multiple control channels, and each control channel supports carrying multiple control information DCI. The improved control channel can adaptively select the time-frequency position according to interference and fading (including time-varying interference and fading) in different interference and fading scenarios to avoid the frequency domain position of interference and fading, so that the communication system has better performance.

[0006] The present invention is achieved through the following technical solutions:

[0007] This solution provides a control channel based on a 5G standard waveform. The receiving end or the transmitting end of the control channel includes one or more processors; the processors are configured to:

[0008] The definition supports multiple types of control resource sets, including at least public control resource sets and dedicated control resource sets;

[0009] The public control resource set and the dedicated control resource set are respectively defined as occupying one or more time domain symbols;

[0010] The dedicated control resource set is defined as supporting mapping of one control channel, and the public control resource set is defined as supporting mapping of one or more control channels; each control channel is defined as supporting carrying multiple control information, and each control information carries resource allocation information of a data channel.

[0011] A further optimization solution is that the common control resource set is defined as occupying m*n time-frequency domain resource units, where m represents the number of time-domain symbols occupied by the common control resource set, and n represents the number of frequency-domain resource units of the control channel on one time-domain symbol in the common control resource set;

[0012] The dedicated control resource set is defined as occupying k*l time-frequency domain resource units, where k represents the number of time domain symbols occupied by the dedicated control resource set in one symbol, and l represents the number of frequency domain resource units of the control channel in one time domain symbol in the dedicated control resource set.

[0013] A further optimization solution is that the public control resource set and the dedicated control resource set are respectively defined as occupying continuous time-frequency domain resource units, and the number of time-frequency domain resource units occupied by the public control resource set is twice the number of time-frequency domain resource units occupied by the dedicated control resource set.

[0014] A further optimization solution is that both the public control resource set and the dedicated control resource set are defined to support frequency domain interleaving.

[0015] A further optimization solution is that the control channel is defined as occupying one or more time domain symbols;

[0016] When the control channel occupies one time domain symbol, the time domain starting position of the control channel starts from the 0th time domain symbol and occupies the 0th time domain symbol in a time slot;

[0017] When the control channel occupies j time domain symbols, the time domain starting position of the control channel starts from the 0th time domain symbol and occupies the 0th time domain symbol to the j-1th time domain symbol in a time slot.

[0018] A further optimization solution is that the number of time domain symbols occupied by the control channel supports expansion and contraction.

[0019] A further optimization solution is that when the common control resource set supports mapping multiple control channels, each control channel occupies frequency domain resources in a frequency division multiplexing manner, and time-frequency resources are continuously distributed.

[0020] A further optimization solution is that when the common control resource set supports mapping multiple control channels, the CCE aggregation level of each control channel is the same.

[0021] A further optimization solution is to dynamically adjust the CCE aggregation level of the control channel as the working bandwidth of the control channel is adjusted.

[0022] This solution also provides a channel parameter calculation method for obtaining the parameters of the control channel based on the 5G standard waveform. The method includes:

[0023] Calculate PNID based on PSS and SSS sequence ID of synchronization channel;

[0024] Parse the 0th bit field of the PNID to obtain the time domain symbol occupancy number of the control channel;

[0025] Parse the first bit of the PNID to obtain the CCE aggregation level of the control channel;

[0026] Parsing the 2nd to K-1th bit field of the PNID can obtain the CCE starting position index of the control channel, where K represents the total number of used bit fields;

[0027] Define the frequency domain resource block where the center frequency of the synchronization channel is located as index position 0, and calculate the CCE index position P based on the 2nd to K-1th bits of the PNID:

[0028] Take the CCE closest to the center frequency of the synchronization channel as the reference CCE and obtain the absolute frequency F of the reference CCE SS-D :

[0029]

[0030] in Indicates the minimum starting frequency of the current operating frequency band; F SS Indicates the center frequency of the synchronization channel; Indicates rounding down;

[0031] Absolute frequency F based on reference CCE SS-D Calculate the frequency domain resource block offset of the absolute frequency of the reference CCE relative to the center frequency of the synchronization channel

[0032] Based on the CCE index position P, the relative difference between the target CCE starting frequency domain resource block and the reference CCE frequency domain resource block is calculated.

[0033] According to the frequency domain resource block offset and relative difference Get the absolute deviation between the target CCE starting frequency domain resource block and the reference CCE frequency domain resource block

[0034] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0035] 1. The control channel and channel parameter calculation method based on the 5G standard waveform provided by the present invention improves the control channel itself on the basis of the existing control channel. The public control resource set supports the processing of multiple control channels, and each control channel supports carrying multiple control information.

[0036] 2. The control channel and channel parameter calculation method based on the 5G standard waveform provided by the present invention adopts the same aggregation level for multiple control channels carried by public control resources, reducing the number of blind decoding and lowering system complexity;

[0037] 3. The present invention provides a control channel and channel parameter calculation method based on a 5G standard waveform. The number of time-domain symbols occupied by the control channel can be adaptively expanded and contracted, and the CCE aggregation level of the control channel is dynamically adjusted as the control channel operating bandwidth is adjusted, effectively improving the anti-interference performance of the control channel.

[0038] 4. The present invention provides a control channel and channel parameter calculation method based on the 5G standard waveform; each control channel supports carrying multiple control messages, and the frequency domain resource configuration method in each control message is different. Each control message DCI schedules a synchronization channel (PSS) to compress the bit overhead of the transmission configuration indication information header and improve the coding efficiency of the control channel (PCCH);

[0039] 5. The present invention provides a control channel and channel parameter calculation method based on the 5G standard waveform; the time-frequency domain resource location of the control channel, as well as parameters such as the aggregation level, are calculated based on the scheduling information of the synchronization channel to increase scheduling flexibility;

[0040] 6. The present invention provides a control channel and channel parameter calculation method based on the 5G standard waveform; the improved control channel can adaptively select the time-frequency domain position according to interference and fading (including time-varying interference and fading) in different interference and fading scenarios to avoid the frequency domain position of interference and fading, so that the communication system has better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0042] Figure 1 Schematic diagram of time-frequency resource units of a control resource set;

[0043] Figure 2 Schematic diagram of resource mapping for a control channel occupying 1 time domain symbol and 2 time domain symbols;

[0044] Figure 3 Schematic diagram of the relationship between control channels, public control resource sets and dedicated control resource sets;

[0045] Figure 4 Schematic diagram of the bit field definition of PNID;

[0046] Figure 5 A flowchart of a method for calculating control channel parameters at a receiving end is shown. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0048] In the 5G standard waveform system, interference and fading have a significant impact on the system, especially for military application scenarios and emergency communication scenarios, where the impact of time-varying interference and fading is more significant. In view of this, this solution provides the following embodiments to solve the above technical problems.

[0049] Example 1

[0050] This embodiment provides a control channel based on a 5G standard waveform. The receiving end or the transmitting end of the control channel includes one or more processors; the processors are configured to:

[0051] The definition supports multiple types of control resource sets, including at least a common control resource set (common coreset) and a dedicated control resource set (dedicate coreset);

[0052] The public control resource set and the dedicated control resource set are respectively defined as occupying one or more time domain symbols; specifically, occupying at least one time domain symbol and at most three time domain symbols.

[0053] The dedicated control resource set is defined as supporting mapping of one control channel, and the public control resource set is defined as supporting mapping of one or more control channels; each control channel is defined as supporting carrying multiple control information, and each control information carries scheduling information of a data channel.

[0054] Both the public control resource set and the dedicated control resource set support frequency domain interleaving; when the control channel is working, it can be determined whether the public control resource set or the dedicated control resource set requires frequency domain interleaving according to demand.

[0055] The common control resource set is defined as occupying m*n time-frequency domain resource units, where m represents the number of time-domain symbols occupied by the common control resource set, and n represents the number of frequency-domain resource units of the control channel on one time-domain symbol in the common control resource set;

[0056] The dedicated control resource set is defined as occupying k*l time-frequency domain resource units, where k represents the number of time domain symbols occupied by the dedicated control resource set in one symbol, and l represents the number of frequency domain resource units of the control channel in one time domain symbol in the dedicated control resource set.

[0057] The public control resource set and the dedicated control resource set are respectively defined as occupying continuous time-frequency domain resource units, and the number of time-frequency domain resource units occupied by the public control resource set is twice the number of time-frequency domain resource units occupied by the dedicated control resource set.

[0058] The number of time-frequency resources occupied by the common control resource set and the dedicated control resource set is an integer multiple of the control channel element (CCE). Each CCE includes 6 consecutive frequency domain resource blocks (RBs), and each frequency domain resource block includes 12 frequency domain resource elements (REs).

[0059] The control channel is defined as occupying one or more time domain symbols; the starting symbol of the time domain symbol is 0 and the maximum occupied time domain symbols is 2;

[0060] When the control channel occupies one time domain symbol, the time domain starting position of the control channel starts from the 0th time domain symbol and occupies the 0th time domain symbol in a time slot;

[0061] When the control channel occupies j time domain symbols, the time domain starting position of the control channel starts from the 0th time domain symbol and occupies the 0th time domain symbol to the j-1th time domain symbol in a time slot.

[0062] The number of time domain symbols occupied by the control channel supports expansion and contraction.

[0063] The dedicated control resource set is defined as supporting only one control channel, that is, all the time-frequency resource units of the dedicated control resource set are used to map one control channel;

[0064] The common control resource set is defined to support mapping of one or two control channels; each control channel is defined to support carrying multiple control information DCIs, and each control information DCI carries resource allocation information of a data channel.

[0065] When the common control resource set supports mapping multiple control channels, that is, all time-frequency resource units of the common control resource set are used to map two control channels; each control channel occupies frequency domain resources in a frequency division multiplexing manner, and the time-frequency resources are continuously distributed.

[0066] When the common control resource set supports mapping multiple control channels, the control channels are adjacent in the frequency domain, and no spare frequency domain resource blocks are left between two adjacent control channels.

[0067] When the common control resource set supports mapping multiple control channels, the CCE aggregation level of each control channel is the same.

[0068] The CCE aggregation level of the control channel is dynamically adjusted as the operating bandwidth of the control channel is adjusted.

[0069] The receiving end or transmitting end in this embodiment may be a base station, user equipment, etc., that is, the control channel may be used between base stations or between a base station and user equipment.

[0070] Since frequency domain interleaving can randomly disperse the interference of the control channel to different frequency resources, when deep fading occurs in the wireless channel, the information can be dispersed to a wider frequency band to avoid concentrated interference, thereby reducing the impact of overall interference and improving the channel's anti-interference performance. In this embodiment, frequency domain interleaving is used to achieve dispersed interference between the public control resource set and the dedicated control resource set, reducing the impact of deep fading and ensuring that each receiving end and transmitting end can reliably receive control information.

[0071] In this embodiment, the common control resource set and the dedicated control resource set are defined to support the occupation of 1 to 3 time domain symbols. When the common control resource set occupies 1 time domain symbol, it supports a control channel of 1 time domain symbol; when the common control resource set occupies 2 time domain symbols, it supports a control channel of 2 time domain symbols. Specifically:

[0072] The common control resource set can carry up to two control channels. When the common control resource set carries two control channels, these two control channels occupy frequency domain resources using frequency division multiplexing. The time-frequency resources are continuously distributed. The time-frequency resources occupied by the common control resource set are 4 or 8 CCEs, and the corresponding number of frequency domain resource blocks (RBs) is 48 or 96 RBs. When the common control resource set carries one control channel, the time-frequency resources occupied by the common control resource set are 8 or 16 CCEs, and the corresponding number of frequency domain resource blocks is 48 or 96 RBs.

[0073] In this embodiment, the dedicated control resource set is defined as occupying 1 to 2 time domain symbols; when the dedicated control resource set occupies 1 time domain symbol, it supports a control channel of 1 time domain symbol; when the dedicated control resource set occupies 2 time domain symbols, it supports a control channel of 2 time domain symbols; the dedicated control resource set only carries 1 control channel, and the time-frequency resources it occupies are 4 or 8 CCEs, and the corresponding number of frequency domain resource blocks is 24 or 48 RBs.

[0074] like Figure 1 As shown, the time-frequency resource unit of the control resource set is rectangular. The time-frequency resource unit only defines the number of frequency domain resource blocks (RBs) and the number of time domain symbols of the control resource set (dedicated control resource set or public control resource set), and does not define the position of the starting frequency domain resource block (RB) in the frequency domain;

[0075] The control channel consists of a pilot (DMRS) and data (DATA). In each frequency domain resource block (RB) occupied by the control channel, its pilot (DMRS) always occupies the resource elements numbered 0, 2, 3, 4, 6, 7, 8, 10, and 11 in the frequency domain resource unit (RE). The remaining resource units are occupied by data (DATA). When the control channel occupies one time domain symbol, the resource mapping is as follows: Figure 2 shown.

[0076] When the common control resource set carries two PCCHs and the PCCH occupies two time domain symbols, the relationship between the control channel, the common control resource set and the dedicated control resource set is as follows: Figure 3 shown.

[0077] When the common control resource set supports mapping two control channels, these two control channels occupy frequency domain resources using frequency division multiplexing, and the time-frequency resources are continuously distributed; the other two control channels have the same CCE aggregation level, which indicates the resource allocation information of different data channels respectively. This can not only reduce the number of blind decoding of the control channel, thereby reducing the complexity of the system, but also improve the flexibility of system scheduling.

[0078] There are three CCE aggregation levels for the control channel: 4CCE, 8CCE, and 16CCE, corresponding to 24RB, 48RB, and 96RB. The CCE aggregation levels carried by the control channel vary under different working bandwidths, as shown in Table 1:

[0079] Table 1 CCE aggregation levels under different working bandwidths

[0080] Working bandwidth 20MHz 40MHz 60MHz 80MHz 100MHz Number of CCEs occupied by PCCH 4 / 8CCE 4 / 8CCE 4 / 8CCE 4 / 8 / 16CCE 4 / 8 / 16CCE

[0081] This embodiment also configures the control channel payload to carry multiple control information. The frequency domain resource configuration method in each control information is different, and each control information only carries resource allocation information for one data channel, as shown in Table 2:

[0082] Table 2 Bit field definition table of transmission configuration indication information

[0083]

[0084] The control channel based on the 5G standard waveform provided in this embodiment improves upon the existing control channel by configuring it to support multiple types of control resource sets. These control resource sets occupy one or more time domain symbols and support the processing of multiple control channels. Each control channel can also carry multiple control information. The improved control channel can adaptively select time-frequency locations based on interference and fading (including time-varying interference and fading) in different interference and fading scenarios to avoid frequency domain locations where interference and fading occur, thereby improving communication system performance. The control channel supports adaptive expansion and contraction of the number of occupied time domain symbols, and its CCE aggregation level dynamically adjusts with the control channel operating bandwidth, effectively improving the control channel's anti-interference performance. Multiple control channels use the same aggregation level, reducing the number of blind decoding operations and lowering system complexity. Each control channel can carry multiple DCIs, each with a different frequency domain resource configuration method. Each DCI carries resource allocation information for one data channel, compressing the bit overhead of the transmission configuration indicator header and improving the coding efficiency of the control channel (PCCH).

[0085] Example 2

[0086] This embodiment provides a channel parameter calculation method for obtaining the parameters of the control channel based on the 5G standard waveform described in Example 1; Figure 4 As shown, the method includes:

[0087] Step 1: Get PNID based on the PSS and SSS sequence ID of the synchronization channel; the bit field of PNID is defined as follows Figure 5As shown: the first bit field indicates the aggregation level, 0 indicates the aggregation level is 4, 1 indicates the aggregation level is 8, and the default value is 1; the second to fourth bits (a total of 3 bit fields) indicate the index position △ of the CCE, with a value range of 0 to 7; the fifth to ninth bits (a total of 5 bit fields) are not used and have a value of 0;

[0088] Step 2: parse the 0th bit field of PNID to obtain the number of time domain symbols occupied by PCCH;

[0089] Step 3: Parse the first bit field of the PNID to obtain the CCE aggregation level of the PCCH; parse the second to K-1 bits of the PNID to obtain the CCE starting position index of the control channel, where K represents the total number of used bit fields;

[0090] Step 4: With the frequency domain resource block where the center frequency of the synchronization channel is located as index position 0, the index position P of the CCE is calculated based on the 2nd to 3rd Kbits bit fields of the PNID. Specifically, step 4 includes the following sub-steps:

[0091] S41, using the CCE closest to the center frequency of the synchronization channel as the reference CCE, and obtaining the absolute frequency of the reference CCE

[0092]

[0093] in Indicates the minimum starting frequency of the current operating frequency band; F SS Indicates the center frequency of the synchronization channel; Indicates rounding down;

[0094] S42, absolute frequency F based on reference CCE SS-D Calculate the frequency domain resource block offset of the absolute frequency of the reference CCE relative to the center frequency of the synchronization channel

[0095] S43, calculating the relative difference between the target CCE starting frequency domain resource block and the reference CCE frequency domain resource block based on the CCE index position P

[0096] S44, based on the frequency domain resource block offset and relative difference Get the absolute deviation between the target CCE starting frequency domain resource block and the reference CCE frequency domain resource block

[0097] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control channel based on the 5G standard waveform, characterized by: The receiving end or the transmitting end of the control channel includes one or more processors; the processors are configured to: The definition supports multiple types of control resource sets, including at least public control resource sets and dedicated control resource sets; The public control resource set and the dedicated control resource set are respectively defined as occupying one or more time domain symbols; The dedicated control resource set is defined as supporting mapping of one control channel, and the public control resource set is defined as supporting mapping of one or more control channels; each control channel is defined as supporting carrying multiple control information, and each control information carries resource allocation information of a data channel.

2. The control channel based on the 5G standard waveform according to claim 1, characterized in that: The common control resource set is defined as occupying m*n time-frequency domain resource units, where m represents the number of time-domain symbols occupied by the common control resource set, and n represents the number of frequency-domain resource units of the control channel on one time-domain symbol in the common control resource set; The dedicated control resource set is defined as occupying k*l time-frequency domain resource units, where k represents the number of time domain symbols occupied by the dedicated control resource set in one symbol, and l represents the number of frequency domain resource units of the control channel in one time domain symbol in the dedicated control resource set.

3. The control channel based on the 5G standard waveform according to claim 2, characterized in that: The public control resource set and the dedicated control resource set are respectively defined as occupying continuous time-frequency domain resource units, and the number of time-frequency domain resource units occupied by the public control resource set is twice the number of time-frequency domain resource units occupied by the dedicated control resource set.

4. The control channel based on the 5G standard waveform according to claim 2, characterized in that: The common control resource set and the dedicated control resource set are both defined to support frequency domain interleaving.

5. The control channel based on the 5G standard waveform according to claim 2, characterized in that: The control channel is defined as occupying one or more time domain symbols; When the control channel occupies one time domain symbol, the time domain starting position of the control channel starts from the 0th time domain symbol and occupies the 0th time domain symbol in a time slot; When the control channel occupies j time domain symbols, the time domain starting position of the control channel starts from the 0th time domain symbol and occupies the 0th time domain symbol to the j-1th time domain symbol in a time slot.

6. The control channel based on the 5G standard waveform according to claim 5, characterized in that: The number of time domain symbols occupied by the control channel supports expansion and contraction.

7. The control channel based on the 5G standard waveform according to claim 2, characterized in that: When the common control resource set supports mapping multiple control channels, each control channel occupies frequency domain resources in a frequency division multiplexing manner, and time-frequency resources are continuously distributed.

8. The control channel based on the 5G standard waveform according to claim 7, characterized in that: When the common control resource set supports mapping multiple control channels, the control channels are adjacent in the frequency domain, and no spare frequency domain resource blocks are left between two adjacent control channels.

9. The control channel based on the 5G standard waveform according to claim 7, characterized in that: When the common control resource set supports mapping multiple control channels, the CCE aggregation level of each control channel is the same.

10. The control channel based on the 5G standard waveform according to claim 9, characterized in that: The CCE aggregation level of the control channel is dynamically adjusted as the operating bandwidth of the control channel is adjusted.

11. A channel parameter calculation method, characterized in that: Used to obtain parameters of a control channel based on a 5G standard waveform as described in any one of claims 2 to 10; the method comprising: Calculate PNID based on PSS and SSS sequence ID of synchronization channel; Parse the 0th bit field of the PNID to obtain the time domain symbol occupancy number of the control channel; Parse the first bit of the PNID to obtain the CCE aggregation level of the control channel; Parse the 2nd to Kth bit fields of the PNID to obtain the CCE starting position index of the control channel, where K represents the total number of used bit fields; Define the frequency domain resource block where the center frequency of the synchronization channel is located as index position 0, and calculate the CCE index position P based on the 2nd to Kth bits of the PNID: Take the CCE closest to the center frequency of the synchronization channel as the reference CCE and obtain the absolute frequency F of the reference CCE SS-D : in Indicates the minimum starting frequency of the current operating frequency band; F SS Indicates the center frequency of the synchronization channel; Indicates rounding down; Absolute frequency F based on reference CCE SS-D Calculate the frequency domain resource block offset of the absolute frequency of the reference CCE relative to the center frequency of the synchronization channel Based on the CCE index position P, the relative difference between the target CCE starting frequency domain resource block and the reference CCE frequency domain resource block is calculated. According to the frequency domain resource block offset and relative difference Get the absolute deviation between the target CCE starting frequency domain resource block and the reference CCE frequency domain resource block

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