TECHNICAL FIELD

The present disclosure generally relates to communication field, and more particularly, to a method for allocating a control resource set, a method for acquiring a control resource set, a base station, a user equipment and a readable medium.

BACKGROUND

In a 5G system, a User Equipment (UE) in an idle state needs to monitor a Physical Downlink Control Channel (PDCCH) and blindly detect the PDCCH in a common search space to acquire Downlink Control Information (DCI) therein, so as to receive common control messages, such as Remaining Minimum System Information (RMSI) or paging messages, in a Physical Downlink Shared Channel (PDSCH) indicated by the DCI. Time-frequency resources corresponding to the PDCCH to be monitored by the UE in the idle state are referred to as a Control Resource Set (CORESET).

A base station sends a Master Information Block (MIB) in a Physical Broadcast Channel (PBCH) to indicate a first CORESET the UE needs to monitor in the idle state, so that the UE blindly detects a PDCCH in the first CORESET to acquire information such as RMSI when in the idle state. Further, the RMSI further indicates a second CORESET to be monitored by the UE in the idle state, so that the UE may blindly detect a PDCCH in the second CORESET in the idle state to acquire paging messages or the like. The first CORESET and the second CORESET are collectively referred to as an idle CORESET.

In specific product implementation, a base station at a network deploys the idle CORESET based on an application scenario, and sends the idle CORESET to a UE through signaling, so that the UE monitors a PDCCH on the configured idle CORESET after searching cells. Currently, the idle CORESET is directly indicated by signaling. When the signaling indicating the idle CORESET is large, signaling overhead of the network is large accordingly.

SUMMARY

By embodiments of the present disclosure, overhead of signaling indicating a CORESET may be reduced.

In an embodiment of the present disclosure, a method for allocating CORESET is provided, including: configuring time position information of at least one CORESET, wherein the time position information includes: the number of symbols occupied by the at least one CORESET, or the number of symbols occupied by the at least one CORESET and a start position of the at least one CORESET, wherein the symbols include symbols in a numerology used by the at least one CORESET; configuring position information of the at least one CORESET in a System Frame Number (SFN); and transmitting the time position information and the position information of the at least one CORESET to a UE, so that the UE selects the start position of the at least one CORESET based on the time position information and the position information of the at least one CORESET, and a preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET.

Optionally, the at least one CORESET includes time-frequency resources corresponding to a PDCCH to be monitored by the UE in an idle state.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 15 kHz or 30 kHz and with a time resource pattern corresponding to pattern 2, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of a zeroth slot, or the zeroth and the sixth symbols of the zeroth slot, or the zeroth and the first symbols of a first slot, or the zeroth and the sixth symbols of the first slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is one, time positions including: the zeroth symbol of the zeroth slot, or the zeroth symbol of the first slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the sixth and the seventh symbols of the zeroth slot, or the zeroth, the first, the sixth and the seventh symbols of the first slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is one, time positions including: the zeroth and the first symbols of the zeroth slot, and the zeroth and the first symbols of the first slot.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 120 kHz or 30 kHz and with a time resource pattern corresponding to pattern 1, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of a zeroth slot, or the zeroth and the third symbols of the zeroth slot, or the zeroth and the first symbols of a first slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is one, time positions including: the zeroth symbol of the zeroth slot, or the zeroth symbol of the first slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the second and the third symbols of the zeroth slot, or the twelfth and the thirteenth symbols of the zeroth slot and the zeroth and the first symbols of the first slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is one, time positions including: the zeroth and the first symbols of the zeroth slot, or the zeroth and the first symbols of the first slot.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 240 kHz, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is four, time positions including: the zeroth, the first, the second and the third symbols of a zeroth slot, or the zeroth, the second, the fourth and the sixth symbols of the zeroth slot, or the zeroth, the first, the second and the third symbols of a second slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of the zeroth slot, and the zeroth and the first symbols of the second slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is four, time positions including: the zeroth, the first, the second, the third, the fourth, the fifth, the sixth and the seventh symbols of the zeroth slot, or the tenth, the eleventh, the twelfth and the thirteenth symbols of a first slot and the zeroth, the first, the second and the third symbols of the second slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the second and the third symbols of the zeroth slot, or the zeroth, the first, the second and the third symbols of the second slot.

Optionally, the start position indicates a position of a first symbol in the CORESET, and the number of the at least one CORESET in one, two or four slots.

Optionally, a time position indicated by the time position information is a time position of the at least one CORESET in one, two or four slots.

Optionally, configuring position information of the at least one CORESET in an SFN includes: configuring a period of a CORESET burst set to be N times of a period of a synchronization signal burst set, wherein N is a positive integer, and the CORESET burst set consists of all CORESETs which complete one round of beam sweeping or consists of all CORESETs specified within a monitoring period of the UE; and configuring an offset between a start time of the CORESET burst set and a start time of the synchronization signal burst set to be zero.

Optionally, the time position information and the position information of the at least one CORESET are transmitted to the UE through MIB or RMSI.

In an embodiment of the present disclosure, a method for acquiring CORESET is provided, including: a UE receiving configuration information from a base station, wherein the configuration information includes time position information of at least one CORESET, and position information of the at least one CORESET in an SFN, wherein the time position information includes: the number of symbols occupied by the at least one CORESET, or the number of symbols occupied by the at least one CORESET and a start position of the at least one CORESET, wherein the symbols include symbols in a numerology used by the at least one CORESET; and selecting the start position of the at least one CORESET based on the configuration information, and a preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET.

Optionally, the at least one CORESET includes time-frequency resources corresponding to a PDCCH to be monitored by the UE in an idle state.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 15 kHz or 30 kHz and with a time resource pattern corresponding to pattern 2, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of a zeroth slot, or the zeroth and the sixth symbols of the zeroth slot, or the zeroth and the first symbols of a first slot, or the zeroth and the sixth symbols of the first slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is one, time positions including: the zeroth symbol of the zeroth slot, or the zeroth symbol of the first slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the sixth and the seventh symbols of the zeroth slot, or the zeroth, the first, the sixth and the seventh symbols of the first slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is one, time positions including: the zeroth and the first symbols of the zeroth slot, and the zeroth and the first symbols of the first slot.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 120 kHz or 30 kHz and with a time resource pattern corresponding to pattern 1, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of a zeroth slot, or the zeroth and the third symbols of the zeroth slot, or the zeroth and the first symbols of a first slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is one, time positions including: the zeroth symbol of the zeroth slot, or the zeroth symbol of the first slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the second and the third symbols of the zeroth slot, or the twelfth and the thirteenth symbols of the zeroth slot and the zeroth and the first symbols of the first slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is one, time positions including: the zeroth and the first symbols of the zeroth slot, or the zeroth and the first symbols of the first slot.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 240 kHz, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is four, time positions including: the zeroth, the first, the second and the third symbols of a zeroth slot, or the zeroth, the second, the fourth and the sixth symbols of the zeroth slot, or the zeroth, the first, the second and the third symbols of a second slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of the zeroth slot, and the zeroth and the first symbols of the second slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is four, time positions including: the zeroth, the first, the second, the third, the fourth, the fifth, the sixth and the seventh symbols of the zeroth slot, or the tenth, the eleventh, the twelfth and the thirteenth symbols of a first slot and the zeroth, the first, the second and the third symbols of the second slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the second and the third symbols of the zeroth slot, or the zeroth, the first, the second and the third symbols of the second slot.

Optionally, the start position indicates a position of a first symbol in the CORESET, and the number of the at least one CORESET in one, two or four slots.

Optionally, a time position indicated by the time position information is a time position of the at least one CORESET in one, two or four slots.

Optionally, the position information of the at least one CORESET in the SFN includes: a period of a CORESET burst set being N times of a period of a synchronization signal burst set, wherein N is a positive integer, and the CORESET burst set consists of all CORESETs which complete one round of beam sweeping or consists of all CORESETs specified within a monitoring period of the UE; and an offset between a start time of the CORESET burst set and a start time of the synchronization signal burst set being zero.

Optionally, the configuration information is received from the base station through MIB or RMSI.

Optionally, the method may further include: receiving Demodulation Reference Signal (DMRS) on the at least one CORESET to perform time-frequency tracking.

In an embodiment of the present disclosure, a base station is provided, including: a configuring circuitry which includes a first configuring sub-circuitry and a second configuring sub-circuitry, wherein the first configuring sub-circuitry is configured to configure time position information of at least one CORESET, wherein the time position information includes: the number of symbols occupied by the at least one CORESET, or the number of symbols occupied by the at least one CORESET and a start position of the at least one CORESET, wherein the symbols include symbols in a numerology used by the at least one CORESET; wherein the second configuring sub-circuitry is configured to configure position information of the at least one CORESET in an SFN; and a transmitting circuitry configured to transmit the time position information and the position information of the at least one CORESET to a UE, so that the UE selects the start position of the at least one CORESET based on the time position information and the position information of the at least one CORESET, and a preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET.

Optionally, the at least one CORESET includes time-frequency resources corresponding to a PDCCH to be monitored by the UE in an idle state.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 15 kHz or 30 kHz and with a time resource pattern corresponding to pattern 2, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of a zeroth slot, or the zeroth and the sixth symbols of the zeroth slot, or the zeroth and the first symbols of a first slot, or the zeroth and the sixth symbols of the first slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is one, time positions including: the zeroth symbol of the zeroth slot, or the zeroth symbol of the first slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the sixth and the seventh symbols of the zeroth slot, or the zeroth, the first, the sixth and the seventh symbols of the first slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is one, time positions including: the zeroth and the first symbols of the zeroth slot, and the zeroth and the first symbols of the first slot.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 120 kHz or 30 kHz and with a time resource pattern corresponding to pattern 1, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of a zeroth slot, or the zeroth and the third symbols of the zeroth slot, or the zeroth and the first symbols of a first slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is one, time positions including: the zeroth symbol of the zeroth slot, or the zeroth symbol of the first slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the second and the third symbols of the zeroth slot, or the twelfth and the thirteenth symbols of the zeroth slot and the zeroth and the first symbols of the first slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is one, time positions including: the zeroth and the first symbols of the zeroth slot, or the zeroth and the first symbols of the first slot.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 240 kHz, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is four, time positions including: the zeroth, the first, the second and the third symbols of a zeroth slot, or the zeroth, the second, the fourth and the sixth symbols of the zeroth slot, or the zeroth, the first, the second and the third symbols of a second slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of the zeroth slot, and the zeroth and the first symbols of the second slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is four, time positions including: the zeroth, the first, the second, the third, the fourth, the fifth, the sixth and the seventh symbols of the zeroth slot, or the tenth, the eleventh, the twelfth and the thirteenth symbols of a first slot and the zeroth, the first, the second and the third symbols of the second slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the second and the third symbols of the zeroth slot, or the zeroth, the first, the second and the third symbols of the second slot.

Optionally, the start position indicates a position of a first symbol in the CORESET, and the number of the at least one CORESET in one, two or four slots.

Optionally, a time position indicated by the time position information is a time position of the at least one CORESET in one, two or four slots.

Optionally, the second configuring sub-circuitry is configured to: configure a period of a CORESET burst set to be N times of a period of a synchronization signal burst set, wherein N is a positive integer, and the CORESET burst set consists of all CORESETs which complete one round of beam sweeping or consists of all CORESETs specified within a monitoring period of the UE; and configure an offset between a start time of the CORESET burst set and a start time of the synchronization signal burst set to be zero.

Optionally, the transmitting circuitry is configured to transmit the time position information and the position information of the at least one CORESET to the UE through MIB or RMSI.

In an embodiment of the present disclosure, a UE is provided, including: a first receiving circuitry, configured to receive configuration information from a base station, wherein the configuration information includes time position information of at least one CORESET, and position information of the at least one CORESET in an SFN, wherein the time position information includes: the number of symbols occupied by the at least one CORESET, or the number of symbols occupied by the at least one CORESET and a start position of the at least one CORESET, wherein the symbols include symbols in a numerology used by the at least one CORESET; and an acquiring circuitry, configured to select the start position of the at least one CORESET based on the configuration information, and a preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET.

Optionally, the at least one CORESET includes time-frequency resources corresponding to a PDCCH to be monitored by the UE in an idle state.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 15 kHz or 30 kHz and with a time resource pattern corresponding to pattern 2, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of a zeroth slot, or the zeroth and the sixth symbols of the zeroth slot, or the zeroth and the first symbols of a first slot, or the zeroth and the sixth symbols of the first slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is one, time positions including: the zeroth symbol of the zeroth slot, or the zeroth symbol of the first slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the sixth and the seventh symbols of the zeroth slot, or the zeroth, the first, the sixth and the seventh symbols of the first slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is one, time positions including: the zeroth and the first symbols of the zeroth slot, and the zeroth and the first symbols of the first slot.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 120 kHz or 30 kHz and with a time resource pattern corresponding to pattern 1, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of a zeroth slot, or the zeroth and the third symbols of the zeroth slot, or the zeroth and the first symbols of a first slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is one, time positions including: the zeroth symbol of the zeroth slot, or the zeroth symbol of the first slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the second and the third symbols of the zeroth slot, or the twelfth and the thirteenth symbols of the zeroth slot and the zeroth and the first symbols of the first slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is one, time positions including: the zeroth and the first symbols of the zeroth slot, or the zeroth and the first symbols of the first slot.

Optionally, the preset table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET includes: to a system with a subcarrier spacing of 240 kHz, if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is four, time positions including: the zeroth, the first, the second and the third symbols of a zeroth slot, or the zeroth, the second, the fourth and the sixth symbols of the zeroth slot, or the zeroth, the first, the second and the third symbols of a second slot; if the number of symbols occupied by each of the at least one CORESET is one, and the number of the at least one CORESET is two, time positions including: the zeroth and the first symbols of the zeroth slot, and the zeroth and the first symbols of the second slot; if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is four, time positions including: the zeroth, the first, the second, the third, the fourth, the fifth, the sixth and the seventh symbols of the zeroth slot, or the tenth, the eleventh, the twelfth and the thirteenth symbols of a first slot and the zeroth, the first, the second and the third symbols of the second slot; and if the number of symbols occupied by each of the at least one CORESET is two, and the number of the at least one CORESET is two, time positions including: the zeroth, the first, the second and the third symbols of the zeroth slot, or the zeroth, the first, the second and the third symbols of the second slot.

Optionally, the start position indicates a position of a first symbol in the CORESET, and the number of the at least one CORESET in one, two or four slots.

Optionally, a time position indicated by the time position information is a time position of the at least one CORESET in one, two or four slots.

Optionally, the position information of the at least one CORESET in the SFN includes: a period of a CORESET burst set being N times of a period of a synchronization signal burst set, wherein N is a positive integer, and the CORESET burst set consists of all CORESETs which complete one round of beam sweeping or consists of all CORESETs specified within a monitoring period of the UE; and an offset between a start time of the CORESET burst set and a start time of the synchronization signal burst set being zero.

Optionally, the first receiving circuitry is configured to receive the configuration information from the base station through MIB or RMSI.

Optionally, the UE may further include a second receiving circuitry, configured to receive DMRS on the at least one CORESET to perform time-frequency tracking.

In an embodiment of the present disclosure, a computer readable medium which has computer instructions stored therein is provided, wherein once the computer instructions are executed, the method for allocating CORESET is performed.

In an embodiment of the present disclosure, a computer readable medium which has computer instructions stored therein is provided, wherein once the computer instructions are executed, the method for acquiring CORESET is performed.

In an embodiment of the present disclosure, a base station is provided, including a memory and a processor, wherein the memory has computer instructions stored therein, and once executing the computer instructions, the processor performs the method for allocating CORESET.

In an embodiment of the present disclosure, a UE is provided, including a memory and a processor, wherein the memory has computer instructions stored therein, and once executing the computer instructions, the processor performs the method for acquiring CORESET.

Embodiments of the present disclosure may provide following advantages. A table of relation between the number of symbols occupied by the CORESET and the start position of the CORESET is preset. The base station only needs to configure the time position information of CORESET and the position information of the CORESET in the SFN, without directly indicating the CORESET, which may effectively reduce overhead of signaling indicating a CORESET.

Further, the UE may receive DMRS on the start position of the CORESET to perform time-frequency tracking, which may improve time-frequency tracking performance of the UE.

