A method, storage medium, and computing device for improving the performance of a downlink physical control channel

Abstract

The present invention provides a method, a storage medium and a computing device for improving the performance of a downlink physical control channel. The method includes: a base station obtains interference information of the downlink physical control channel, and recalculates control resource set parameters according to the interference information of the downlink physical control channel; the base station sends the recalculated control resource set parameters to a terminal by adding a new message field; the terminal performs blind detection of downlink physical control information according to the recalculated control resource set parameters. When there is co-frequency cell interference in the downlink physical control channel, the present invention effectively improves the anti-interference performance of the downlink physical control channel by recalculating the information required for blind detection of the downlink physical control channel and dynamically sending it to the terminal through a newly defined message.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a method, a storage medium and a computing device for improving downlink physical control channel performance. Background Art

[0002] The 3GPP wireless NR system 38.331 protocol defines the control resource set information, including the occupied time-frequency domain resources, and whether the interleaving configuration is issued: resource unit group bundling size, interleaving depth and shift index, etc. The relevant protocol definitions are as follows Figure 1 shown.

[0003] The 3GPP wireless NR system 38.211 protocol defines a mapping relationship between control channel elements and resource unit groups in interleaved or non-interleaved situations. The relevant protocol definitions are as follows: Figure 2 shown.

[0004] Currently, NR cells are densely deployed, and the cell edges are susceptible to co-channel interference. When communication interference occurs on the downlink physical control channel, the current NR system faces the following two problems due to the randomness and time-varying nature of communication interference:

[0005] Question 1: In the current NR system, the initial value of the control resource set is statically configured and issued according to the 38.331 protocol, and each activated bandwidth can only be configured with a maximum of 3 control resource sets; when the resource unit group bundling size, interleaving depth and shift index parameters in the control resource set are fixed, the interleaving mapping method between the control channel element and the resource unit group is fixed and unique, and cannot overcome the randomness of interference;.

[0006] Question 2: Currently, if the control resource set needs to be reconfigured, the upper layer of the protocol stack needs to send down the wireless resource control reconfiguration message. In particular, when the NR system is a centralized unit and a distributed unit separated architecture, the triggering and sending of the wireless resource control reconfiguration message will involve communication between the centralized unit and the distributed unit. The entire control resource set reconfiguration and effectiveness process is relatively long and cannot overcome the time-varying nature of interference.

[0007] The above two problems make it impossible for the NR system to effectively and timely avoid downlink physical control channel interference, affecting the performance of downlink physical control channel demodulation. Summary of the invention

[0008] The present invention aims to provide a method, storage medium and computing device for improving the performance of a downlink physical control channel, so as to solve the problem that the NR system cannot effectively and timely avoid downlink physical control channel interference, thereby affecting the performance of downlink physical control channel demodulation.

[0009] The present invention provides a method for improving downlink physical control channel performance, comprising:

[0010] The base station obtains the interference information of the downlink physical control channel, and recalculates the control resource set parameters according to the interference information of the downlink physical control channel;

[0011] The base station sends the recalculated control resource set parameters to the terminal by adding a new message field;

[0012] The terminal performs blind detection of the downlink physical control information according to the recalculated control resource set parameters.

[0013] As a preferred solution, the method for the base station to obtain the interference information of the downlink physical control channel includes:

[0014] Obtained through the sub-band channel state information reporting.

[0015] Furthermore, after the base station obtains the interference information of the downlink physical control channel, it is necessary to first check whether the time-frequency domain resources in the currently configured control resource set are affected by interference:

[0016] (1) If the information in the currently configured control resource set cannot avoid interference, then redefine the time-frequency domain resources in the control resource set to avoid interference;

[0017] (2) If there is interference only on a very small number of downlink channel resource blocks in the control resource set, first filter out the interfered downlink channel resource blocks, and then, through the mapping formula between the control channel element and the resource element group defined in Protocol 38.211, inversely deduce the relationship values of the latest resource element group bundling size, interleaving depth, and shift index. When the value ranges of the resource element group bundling size, interleaving depth, and shift index cannot be satisfied in this control resource set, then re-divide the occupied time-frequency domain information in the control resource set, and then calculate the control resource set parameters.

[0018] In some embodiments, the base station sends the recalculated control resource set parameters to the terminal by adding a new message field to the downlink control information message body of Protocol 38.212.

[0019] Furthermore, when the base station detects that the interference of the downlink physical control channel has disappeared, it uses the deactivation message in the newly added message field in the downlink control information message body of Protocol 38.212 to instruct the terminal to deactivate the recalculated control resource set parameters sent to the terminal through this newly added message field, and resume using the control resource set parameters configured statically.

[0020] In some embodiments, the base station sends the recalculated control resource set parameters to the terminal by adding a new MAC layer control element in Protocol 38.321.

[0021] Further, after the base station detects that the interference of the downlink physical control channel disappears, it uses the deactivation message in the newly added MAC layer control element in the 38.321 protocol to instruct the terminal to deactivate the recalculated control resource set parameters sent to the terminal through this newly added MAC layer control element, and resume using the control resource set parameters sent by static configuration.

[0022] Further, the method for the terminal to perform blind detection of downlink physical control information according to the recalculated control resource set parameters is as follows:

[0023] After the terminal receives the recalculated control resource set parameters, it saves the recalculated control resource set parameters as the latest control resource set parameters;

[0024] Perform blind detection of downlink physical control information according to the latest control resource set parameters.

[0025] The present invention also provides a computer terminal storage medium, storing computer terminal executable instructions, and the computer terminal executable instructions are used to execute the method for improving the performance of the downlink physical control channel as described above.

[0026] The present invention also provides a computing device, including:

[0027] At least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method for improving the performance of the downlink physical control channel as described above.

[0028] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

[0029] When there is co-frequency cell interference in the downlink physical control channel, the present invention recalculates the information required for blind detection of the downlink physical control channel and dynamically sends it to the terminal through a newly defined message, effectively improving the anti-interference performance of the downlink physical control channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a diagram showing the control resource set information defined in the 3GPP 38.331 protocol.

[0032] Figure 2 Diagram showing the mapping formula between the control channel elements defined in 3GPP 38.211 protocol and resource element groups.

[0033] Figure 3 Flowchart of the method for improving the performance of the downlink physical control channel in the present invention.

[0034] Figure 4 Diagram showing an example of the new MAC layer control element for controlling the resource set transmission in 3GPP 38.321 protocol.

[0035] Figure 5 Diagram showing an example of the new MAC layer control element for deactivating the control resource set in 3GPP 38.321 protocol. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1

[0039] For the downlink physical control channel information in the current NR system described in the foregoing problem 1, it is statically configured and transmitted according to the control resource set defined in 3GPP 38.331 protocol. When the fixed values of the resource element group bundle size, interleaving depth, and shift index in this control resource set are taken, the interleaving mapping relationship is fixed; for the long reconfiguration transmission and activation process of the current control resource set information described in the foregoing problem 2, when interference occurs in the downlink physical control channel, facing the foregoing two problems, the NR system cannot respond to channel changes in a timely manner. As Figure 3 shown, this embodiment proposes a method for improving the performance of the downlink physical control channel, including:

[0040] S1, the base station obtains the interference information of the downlink physical control channel, and recalculates the control resource set parameters according to the interference information of the downlink physical control channel;

[0041] As a preferred solution, the method for the base station to obtain the interference information of the downlink physical control channel includes:

[0042] Obtained through sub-band channel state information reporting.

[0043] In this embodiment, after the base station obtains the interference information of the downlink physical control channel, it is necessary to first check whether the time-frequency domain resources in the currently configured control resource set are affected by interference:

[0044] (1) If the information in the currently configured control resource set cannot avoid interference (e.g., continuous downlink channel resource block interference), then redefine the time-frequency domain resources in the control resource set to avoid interference;

[0045] (2) If there is interference only on a very small number of downlink channel resource blocks in the control resource set, first filter out the affected downlink channel resource blocks. Secondly, through the mapping formula of the control channel element and the resource unit group defined in Protocol 38.211, inversely deduce the relationship values of the latest resource unit group bundling size, interleaving depth, and shift index. When the value ranges of the resource unit group bundling size, interleaving depth, and shift index cannot be satisfied in this control resource set, then re-divide the occupied time-frequency domain information in the control resource set, and then calculate the control resource set parameters.

[0046] S2. The base station sends the recalculated control resource set parameters to the terminal through a newly added message field;

[0047] In this embodiment, the following solution can be adopted to send the recalculated control resource set parameters to the terminal:

[0048] The base station sends the recalculated control resource set parameters to the terminal by adding a new message field to the downlink control information message body of Protocol 38.212.

[0049] Examples of the newly added message fields are as follows:

[0050] New coreset flag - 1bit

[0051] New coreset id - 3bits

[0052] New corset Duration - 2bits

[0053] New corset regbundlesize - 2bits

[0054] New corset interleaverSize - 2bits

[0055] New coreset relates to old coreset id - 2 bits

[0056] New corset relates to searchspace id - 2 bits

[0057] New corset shiftIndex - 9 bits

[0058] New corset frequencyDomainResources - 45 bits

[0059] S3. The terminal performs blind detection of downlink physical control information according to the recalculated control resource set parameters:

[0060] After receiving the recalculated control resource set parameters, the terminal saves the recalculated control resource set parameters as the latest control resource set parameters;

[0061] Perform blind detection of downlink physical control information according to the latest control resource set parameters.

[0062] Finally, when the base station detects that the interference of the downlink physical control channel disappears, it uses the deactivation message (New coreset flag - 1 bit) in the newly added message field in the downlink control information message body of the 38.212 protocol to instruct the terminal to deactivate the recalculated control resource set parameters sent to the terminal through this newly added message field, and resume using the control resource set parameters configured statically.

[0063] Embodiment 2

[0064] As Figure 3 shown, this embodiment proposes a method for improving the performance of the downlink physical control channel, including:

[0065] S1. The base station obtains the interference information of the downlink physical control channel, and recalculates the control resource set parameters according to the interference information of the downlink physical control channel;

[0066] Similar to Embodiment 1, the method for the base station to obtain the interference information of the downlink physical control channel includes:

[0067] Obtained through sub - band channel state information reporting.

[0068] Similar to Embodiment 1, after the base station obtains the interference information of the downlink physical control channel, it needs to first check whether the time - frequency domain resources in the currently configured control resource set are affected by interference:

[0069] (1) If the information in the currently configured control resource set cannot avoid interference (e.g., continuous downlink channel resource block interference), redefine the time-frequency domain resources in the control resource set to avoid interference;

[0070] (2) If there is interference only on a very small number of downlink channel resource blocks in the control resource set, first filter out the interfered downlink channel resource blocks. Secondly, through the mapping formula of control channel elements and resource element groups defined in Protocol 38.211, inversely deduce the relationship values of the latest resource element group bundling size, interleaving depth, and shift index. When the value ranges of the resource element group bundling size, interleaving depth, and shift index cannot be satisfied in this control resource set, redefine the occupied time-frequency domain information in the control resource set, and then calculate the control resource set parameters.

[0071] S2. The base station sends the recalculated control resource set parameters to the terminal through a newly added message field;

[0072] In this embodiment, the following solution can be adopted to send the recalculated control resource set parameters to the terminal:

[0073] As Figure 4 shown, the base station sends the recalculated control resource set parameters to the terminal by adding a MAC layer control element in Protocol 38.321.

[0074] S3. The terminal performs blind detection of downlink physical control information according to the recalculated control resource set parameters:

[0075] After receiving the recalculated control resource set parameters, the terminal saves the recalculated control resource set parameters as the latest control resource set parameters;

[0076] Perform blind detection of downlink physical control information according to the latest control resource set parameters.

[0077] Finally, when the base station detects that the interference on the downlink physical control channel disappears, use the deactivation message in the newly added MAC layer control element in Protocol 38.321 (as Figure 5 shown) to instruct the terminal to deactivate the recalculated control resource set parameters sent to the terminal through this newly added MAC layer control element, and resume using the control resource set parameters configured statically.

[0078] Embodiment 3

[0079] In addition, this embodiment provides a computer terminal storage medium storing computer terminal executable instructions for executing the method for improving the performance of the downlink physical control channel as described in the foregoing Embodiment 1 and / or Embodiment 2. Examples of computer storage media include magnetic storage media (such as floppy disks, hard disks, etc.), optical recording media (such as CD-ROMs, DVDs, etc.) or memories such as memory cards, ROMs or RAMs. The computer storage medium may also be distributed on computer systems connected by a network, such as an application store.

[0080] Embodiment 4

[0081] This embodiment provides a computing device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method for improving the performance of the downlink physical control channel as described in the foregoing Embodiment 1 and / or Embodiment 2. Examples of computing devices include PCs, tablet computers, smart phones or PDAs, etc.

[0082] The foregoing are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for improving the performance of the downlink physical control channel, characterized in that including: The base station obtains the interference information of the downlink physical control channel, and recalculates the control resource set parameters according to the interference information of the downlink physical control channel; The base station sends the recalculated control resource set parameters to the terminal by adding a new message field; The terminal performs blind detection of the downlink physical control information according to the recalculated control resource set parameters; After the base station obtains the interference information of the downlink physical control channel, it is necessary to first check whether the time-frequency domain resources in the currently configured control resource set are affected by interference: (1) If the information in the currently configured control resource set cannot avoid interference, the time-frequency domain resources in the control resource set are re-defined to avoid interference; (2) If there is interference only on a very small number of downlink channel resource blocks in the control resource set, first filter out the interfered downlink channel resource blocks, and then, through the mapping formula of the control channel element and the resource element group defined in the 38.211 protocol, inversely deduce the relationship values of the latest resource element group bundling size, interleaving depth, and shift index. When the value ranges of the resource element group bundling size, interleaving depth, and shift index cannot be satisfied in this control resource set, the time-frequency domain information occupied by the control resource set is re-divided, and then the control resource set parameters are calculated.

2. The method for improving the performance of the downlink physical control channel according to claim 1, characterized in that, The method for the base station to obtain the interference information of the downlink physical control channel includes: Obtained through sub-band channel state information reporting.

3. The method for improving the performance of the downlink physical control channel according to claim 1, characterized in that The base station sends the recalculated control resource set parameters to the terminal by adding a new message field in the downlink control information message body of the 38.212 protocol.

4. The method for improving the performance of the downlink physical control channel according to claim 3, wherein When the base station detects that the interference of the downlink physical control channel disappears, it uses the deactivation message in the newly added message field in the downlink control information message body of the 38.212 protocol to instruct the terminal to deactivate the recalculated control resource set parameters sent to the terminal through this newly added message field, and resume using the control resource set parameters configured statically.

5. The method for improving the performance of the downlink physical control channel according to claim 1, characterized in that, The base station sends the recalculated control resource set parameters to the terminal by adding a new MAC layer control element in the 38.321 protocol.

6. The method for improving the performance of the downlink physical control channel according to claim 5, characterized in that, When the base station detects that the interference of the downlink physical control channel disappears, it uses the deactivation message in the newly added MAC layer control element in the 38.321 protocol to instruct the terminal to deactivate the recalculated control resource set parameters sent to the terminal through this newly added MAC layer control element, and resume using the control resource set parameters configured statically.

7. The method for improving the performance of the downlink physical control channel according to claim 1, wherein The method for the terminal to perform blind detection of the downlink physical control information according to the recalculated control resource set parameters is: After the terminal receives the recalculated control resource set parameters, it saves the recalculated control resource set parameters as the latest control resource set parameters; Performs blind detection of the downlink physical control information according to the latest control resource set parameters.

8. A computer terminal storage medium stores computer terminal executable instructions, characterized in that, The computer terminal executable instructions are used to execute the method for improving the performance of the downlink physical control channel according to any one of claims 1-7.

9. A computing device, characterized in that, including: At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and when the instructions are executed by the at least one processor, the at least one processor is enabled to perform the method for enhancing the performance of a downlink physical control channel according to any one of claims 1-7.

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