CN111385838B - Base station for allocating channel state report and channel state report allocation method - Google Patents

Base station for allocating channel state report and channel state report allocation method Download PDF

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Publication number
CN111385838B
CN111385838B CN201811613821.7A CN201811613821A CN111385838B CN 111385838 B CN111385838 B CN 111385838B CN 201811613821 A CN201811613821 A CN 201811613821A CN 111385838 B CN111385838 B CN 111385838B
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reporting
channel state
state information
user equipment
base station
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CN111385838A (en
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林佑恩
黄任锋
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Industrial Technology Research Institute ITRI
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Industrial Technology Research Institute ITRI
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Priority to CN202311548649.2A priority Critical patent/CN117793784A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses a base station for allocating channel state returns and a channel state return allocation method. The operation processor drives the communication module to respectively send RRC configuration information comprising periodic channel state information reporting parameters and discontinuous reception parameters to a plurality of user equipments. The periodic channel state information reporting parameter comprises reporting period, reporting time shift and information of PUCCH resources. The RRC configuration messages include the same reporting period, reporting time shift, and information of PUCCH resources. When predicting that a plurality of conflict user equipment in the user equipment will execute channel state information report at the same time, the operation processor decides that one of the conflict user equipment will execute channel state information report and sends a dormancy instruction to other conflict user equipment except the conflict user equipment which can execute channel state information report.

Description

Base station for allocating channel state report and channel state report allocation method
Technical Field
The invention relates to a base station capable of allocating channel state returns and a channel state return allocation method.
Background
In the current Long Term Evolution (LTE) network, in order to improve the spectrum usage efficiency and provide better service quality for the ue, the ue is often required to measure and report the radio channel. If the network requires the UE (User equipment) to perform periodic channel state information (Channel state information, CSI) reporting, UE-specific physical uplink control channel (Physical Uplink Control Channel, PUCCH) resources are typically configured by signaling of the radio resource control (Radio resource control, RRC) layer to perform periodic CSI reporting. However, when the number of UEs or the number of antennas increases, the bandwidth occupied by the PUCCH increases, which results in a reduction of the available uplink bandwidth at the user end, i.e. the bandwidth of the Physical Uplink Shared Channel (PUSCH) decreases.
Generally, compared to the resource scheduling period of the Medium Access Control (MAC) layer, the configuration of the Radio Resource Control (RRC) layer still belongs to a semi-static configuration, and after the configuration, the MAC layer performs the modification after a period of time (seconds to minutes), otherwise the signaling overhead between the network and the ue is too large. Thus, the periodic CSI reporting configuration does not dynamically adjust the PUCCH usage with the radio bearer queue length and the MAC layer resource scheduling period.
Disclosure of Invention
The invention provides a base station for allocating channel state report and a channel state report allocation method, wherein the base station can dynamically allocate PUCCH resources to user equipment for periodic CSI report according to the data quantity in the current queue of the radio bearer of the user equipment.
According to an embodiment of the present invention, a base station capable of allocating channel state reports is disclosed, which includes a memory, a communication module, and an operation processor connected to the memory and the communication module through signals. The operation processor is configured to perform driving the communication module to respectively send Radio Resource Control (RRC) configuration messages to a plurality of ues, wherein the RRC configuration messages include periodic channel state information reporting parameters and discontinuous reception parameters, and the periodic channel state information reporting parameters include reporting period, reporting time shift and information of Physical Uplink Control Channel (PUCCH) resources. The RRC configuration messages sent to the ues include the same reporting period, the same reporting time shift, and the same PUCCH resource information. The operation processor is further configured to predict according to the operation states of the ues, determine that one of the plurality of conflicting ues will execute the csi report when predicting that the plurality of conflicting ues will execute the csi report at the same time, and drive the communication module to send a sleep command to other conflicting ues except for the conflicting ues that can execute the csi report.
An embodiment of the invention discloses a channel state report allocating method, which comprises the following steps: the base station respectively transmits Radio Resource Control (RRC) configuration information to a plurality of user equipments, wherein the RRC configuration information comprises a periodic channel state information reporting parameter and a discontinuous reception parameter, and the periodic channel state information reporting parameter comprises reporting period, reporting time displacement and information of Physical Uplink Control Channel (PUCCH) resources; when the base station predicts that a plurality of conflict user equipment in the user equipment will execute channel state information reporting at the same time according to the operation states of the user equipment, the base station determines that one of the conflict user equipment will execute channel state information reporting and sends a dormancy instruction to other conflict user equipment except the conflict user equipment which can execute channel state information reporting. The RRC configuration messages sent to the ues include the same reporting period, the same reporting time shift, and the same information of the PUCCH resources.
According to an embodiment of the invention, a base station capable of allocating channel state reports is disclosed, which comprises a memory, a communication module, and an operation processor connected with the memory and the communication module through signals. The operation processor is configured to execute a scheduling algorithm to obtain a reporting period, a reporting time shift, a discontinuous receiving period corresponding to each of the plurality of user equipments, a wake-up time shift corresponding to each of the plurality of user equipments, and a wake-up duration corresponding to each of the plurality of user equipments, so that a wake-up period of each of the plurality of user equipments is not overlapped with a channel reporting time; the operation processor is further configured to drive the communication module to respectively transmit Radio Resource Control (RRC) configuration messages to the ues, wherein the RRC configuration messages include information of reporting periods, reporting time shifts, uplink control channel (PUCCH) resources, discontinuous reception periods corresponding to the ues receiving the RRC configuration messages, wake-up time shifts corresponding to the ues receiving the RRC configuration messages, and wake-up durations corresponding to the ues receiving the RRC configuration messages, and the RRC configuration messages transmitted to the ues have the same reporting periods, the same reporting times, and the same PUCCH resources.
An embodiment of the invention discloses a channel state report allocating method, which comprises the following steps: the base station executes a scheduling algorithm to obtain a reporting period, a reporting time displacement, a discontinuous receiving period corresponding to each user equipment in the plurality of user equipment, a wake-up time displacement corresponding to each user equipment, and a wake-up duration corresponding to each user equipment, so that the wake-up period of each user equipment is not overlapped with the channel reporting time; the base station respectively transmits Radio Resource Control (RRC) configuration messages to the user equipments, wherein the RRC configuration messages comprise a reporting period, a reporting time shift, information of uplink control channel (PUCCH) resources, and discontinuous reception periods corresponding to the user equipments receiving the RRC configuration messages, wake-up time shifts corresponding to the user equipments receiving the RRC configuration messages and wake-up duration corresponding to the user equipments receiving the RRC configuration messages; the RRC configuration messages transmitted to the ues have the same reporting period, the same channel reporting time and the same PUCCH resource information.
In summary, in the base station and the method for allocating the CSI report according to the present invention, when the expected CSI report collision occurs, the base station may detect the data amount in the current queue of the radio bearer of the ue, so as to perform CSI report scheduling on the same PUCCH resource for different ues. In addition, the configuration of the state information reporting period and the discontinuous receiving period which are multiple of each other can enable the ue to report the channel state information when determining to let the ue perform data transmission, and the rest ues do not report the channel state information. Therefore, the base station and the method for allocating the channel state report can improve the use benefit of the PUCCH, thereby reducing the overall requirement on PUCCH resources.
The foregoing description of the disclosure and the following description of embodiments are presented to illustrate and explain the spirit and principles of the invention and to provide a further explanation of the invention as claimed.
Drawings
Fig. 1A is a diagram of a lte network architecture according to an embodiment of the invention.
Fig. 1B is a schematic diagram illustrating operations of a base station and a ue according to an embodiment of the present invention.
Fig. 2A is a schematic diagram of a preliminary setup waveform of a ue according to an embodiment of the present invention.
Fig. 2B is a waveform diagram illustrating an actual operation of the ue according to an embodiment of the present invention.
Fig. 3 is a waveform diagram illustrating operation of a ue according to an embodiment of the present invention.
Fig. 4A is a flowchart of a method for allocating a csi report according to an embodiment of the invention.
Fig. 4B is a flowchart of a method for allocating a csi report according to another embodiment of the invention.
Fig. 5A is a preliminary setup waveform diagram of a ue according to another embodiment of the present invention.
Fig. 5B is a waveform diagram illustrating an actual operation of a ue according to another embodiment of the present invention.
Fig. 6 is a flowchart of a method for allocating a csi report according to another embodiment of the invention.
FIG. 7 is a waveform diagram illustrating operations according to an embodiment of the present invention.
Fig. 8A-8B are diagrams of operation waveforms according to various embodiments of the present invention.
Fig. 9A-9B are diagrams of operation waveforms according to various embodiments of the present invention.
FIGS. 10A-10B are diagrams illustrating waveforms of operations according to various embodiments of the present invention.
Detailed Description
The detailed features and advantages of the present invention will be set forth in the following detailed description of the embodiments, which is provided to enable those skilled in the art to understand and practice the present invention, and the related objects and advantages of the present invention will be readily understood by those skilled in the art from the present disclosure, claims and drawings. The following examples further illustrate the aspects of the invention in detail, but do not limit the scope of the invention in any way.
In order to avoid excessive system overall bandwidth occupied by Physical Uplink Control Channel (PUCCH) resources due to the increase of the number of user equipments, the concept proposed by the present invention is to make multiple user equipments in the same group share the same numbered Physical Uplink Control Channel (PUCCH) resources to report channel state information, so as to reduce the occupation of the system overall bandwidth. Since the channel resource sharing of multiple ues may cause reporting collision, the channel state reporting allocation method and the base station according to the present invention can dynamically allocate PUCCH resources to the required ues according to the data transmission situation of each ue, so as to avoid reporting collision.
First, referring to fig. 1A, 1B and fig. 2A, fig. 1A is a schematic diagram of a lte network structure according to an embodiment of the present invention, fig. 1B is an operation diagram of a base station and a ue according to an embodiment of the present invention, fig. 2A is a preliminary setup waveform diagram of a ue according to an embodiment of the present invention, and fig. 2B is an actual operation waveform diagram of a ue according to an embodiment of the present invention. As shown in fig. 1A and 1B, the long term evolution network 1 includes a base station eNB, a first UE1 and a second UE2. The base station eNB is adapted to and communicatively connect the first UE1 and the second UE2. The base station eNB has a memory 10, a communication module 11, and an arithmetic processor 12. The operation processor 12 may be configured to control a Radio Resource Control (RRC) layer and a Medium Access Control (MAC) layer (not shown) of the base station eNB, where the base station eNB further has a scheduler (not shown) disposed in the Medium Access Control (MAC) layer. The operation processor 12 of the base station eNB generates an Radio Resource Control (RRC) configuration message through an RRC layer, the RRC configuration message may be stored in the memory 10 and the operation processor 12 may transmit the RRC configuration message to the user equipments UE1 and UE2 by driving the communication module 11. The RRC configuration message includes a periodic channel state information reporting parameter and a discontinuous reception parameter. The periodic channel state information reporting parameter includes information of reporting period, reporting time shift and PUCCH resource, and the discontinuous reception parameter includes discontinuous reception period, wake-up time shift and wake-up duration (On-duration).
Specifically, in the stages STG1 to STG2 of fig. 1B, the operation processor 12 of the base station eNB sends the signaling RF1, RF2 and the receiving signaling RFC1, RFC2 through a Radio Resource Control (RRC) layer, so as to complete the setting of the discontinuous reception parameters DRX1 and DRX2 of the first user equipment UE1 and the second user equipment UE2 and the setting of the periodic channel state information reporting parameters CSI of the first user equipment UE1 and the second user equipment UE2. As shown in the preliminary set waveform diagram of fig. 2A, the DRX parameter DRX1 includes a DRX cycle P1, a wake-up time shift SD1, and a wake-up duration TD1, and the DRX parameter DRX2 includes a DRX cycle P2, a wake-up time shift SD2, and a wake-up duration TD2. The wakeup duration and the sleep time are repeated in a periodic manner to form a power saving mechanism for discontinuous reception (Discontinuous Reception). In this embodiment, the first UE1 and the second UE2 are configured with the same reporting period (e.g., C1), reporting time shift (e.g., SC), and PUCCH resource (e.g., CSI 1).
The operation processor 12 of the base station eNB controls a scheduler connected to the radio resource control layer RRC to track the respective operation states of the first UE1 and the second UE2. In detail, the operation processor 12 may drive the scheduler to track Active (Active) states and Inactive (Inactive) states of the first UE1 and the second UE2. In practice, the Active state means that the first UE1 and the second UE2 are in a state of being able to receive data, i.e. the aforementioned wake-up duration. Conversely, the Inactive (Inactive) state means that the first UE1 and the second UE2 are in a state of not receiving data, i.e. the aforementioned sleep time. The distribution of the active and inactive states included in the operation state of the first UE1 is determined by the discontinuous reception period P1, the wake-up time shift SD1 and the wake-up duration TD1, and the distribution of the active and inactive states included in the operation state of the second UE2 is determined by the discontinuous reception period P2, the wake-up time shift SD2 and the wake-up duration TD2.
In this embodiment, the processor 12 predicts according to the operation states of the first and second UE1, UE2, and when it is predicted that the first and second UE1, UE2 will perform the channel state information reporting at the same time, the processor 12 determines that one of the first and second UE1, UE2 will perform the channel state information reporting. Next, the operation processor 12 drives the communication module 11 to send a sleep command to the other of the first and second UE1, UE2. In other words, the first and second UE1, UE2 are conflicting UE, and the processor 12 determines that one of the two conflicting UE (e.g. the first UE 1) uses the PUCCH resource CSI1 to report the channel state information. On the other hand, the arithmetic processor 12 brings another conflicting user device (e.g., the second user device UE 2) into a sleep state using a sleep instruction.
More specifically, the operation processor 12 predicts whether the expected csi reporting collision will occur according to the operation states of the first UE1 and the second UE2 at the csi reporting time t1 by the scheduler. The reporting time t1 of the status information is determined by the reporting period C1 and the reporting time shift SC. In detail, a user equipment in an Active (Active) state actually performs Channel State Information (CSI) reporting using Physical Uplink Control Channel (PUCCH) resources. However, since the first and second UEs UE1 and UE2 share the same physical uplink control channel resource using the same physical uplink control channel number (e.g. Index 0), only one UE can report channel state information using the physical uplink control channel resource at the same time point. For the embodiment of fig. 2B, when reporting the csi (i.e. "time for reporting the csi t 1") at a certain point in time, if the first UE1 and the second UE2 are both in an Active (Active) state, i.e. it is predicted that the first UE1 and the second UE2 will simultaneously perform the csi reporting, the processor 12 determines that an expected csi reporting collision will occur.
As described above, when it is predicted that the expected channel state information reporting conflict will occur, the operation processor 12 of the base station eNB detects the data transmission states of the first UE1 and the second UE2, so as to send the sleep command drx_ce to terminate the wake-up duration of one of the first UE1 and the second UE2. The sleep instruction drx_ce is a discontinuous reception command medium access control layer control unit (DRX Command of MAC CONTROL ELEMENT, DRX CE).
In an embodiment, when the operation processor 12 of the base station eNB determines that one of the first UE1 and the second UE2 performs data transmission, the operation processor 12 sends the sleep command drx_ce through the driving communication module 11 to make the other one of the first UE1 and the second UE2 enter the inactive state in the operation state and stop performing the channel state information reporting. Specifically, when the first UE1 and the second UE2 are both in an Active (Active) state at the state information reporting time t1, the operation processor 12 of the base station eNB detects and determines which one of the first UE1 and the second UE2 needs to transmit data, and further sends the sleep command drx_ce to the UE that does not transmit data by driving the communication module 11 to terminate the wake-up duration and stop executing the channel state information reporting. The sleep instruction drx_ce is a discontinuous reception command medium access control layer control unit (DRX Command of MAC CONTROL ELEMENT, DRX CE).
For the embodiment of fig. 2B, when it is determined that the expected csi reporting collision occurs at the csi reporting time t1, if the processor 12 of the base station eNB determines that the first UE1 performs data transmission, the processor 12 sends the sleep command drx_ce to the second UE2 to terminate the wakeup duration TD2, as shown in stage STG3 of fig. 1B and fig. 2B. That is, the second UE2 will force the current wake-up duration TD2 to enter the sleep time according to the sleep command drx_ce, and stop executing the channel state information reporting. That is, the second UE2 goes from the active state ON to the inactive state OFF, and the physical uplink control channel resource CSI1 is available for the first UE1 to perform the channel state information reporting, as shown in the stage STG4 of fig. 1B. The sleep command drx_ce is a discontinuous reception command medium access control layer control unit (DRX Command of MAC CONTROL ELEMENT, DRX CE), and thus collision of channel state information returns of the first UE1 and the second UE2 can be avoided.
Referring to fig. 3, fig. 3 is a waveform diagram illustrating an operation of a ue according to an embodiment of the invention. Fig. 3 shows information transmission states of the first user equipment UE1, the second user equipment UE2 and the third user equipment UE 3. As can be seen from fig. 3, when the operation processor 12 of the base station eNB determines to transmit data (data) to the first UE1 in the first period T1, the remaining second UE2 and third UE3 enter the sleep state (e.g. the inactive state OFF of fig. 2B) according to the sleep command drx_ce from the operation processor 12. In this case, the physical uplink control channel resources CSI1 to CSI3 may be provided for the first user equipment UE1 to use in order to perform channel state information reporting.
When the operation processor 12 of the base station eNB determines to transmit data (data) to the second UE2 in the second period T2, the remaining first UE1 and the third UE3 enter the sleep state (e.g. inactive state OFF of fig. 2B) according to the sleep command drx_ce from the operation processor 12. In this case, the physical uplink control channel resources CSI4 to CSI5 may be provided for use by the second user equipment UE2 to perform channel state information reporting. The sleep instruction drx_ce is a discontinuous reception command medium access control layer control unit (DRX Command of MAC CONTROL ELEMENT, DRX CE).
In other words, the first UE1, the second UE2 and the third UE3 share the same physical uplink control channel resource, i.e. the three UEs use the same physical uplink control channel number. In practical operation, one physical uplink control channel resource cannot be used by a plurality of ues at the same time, so that the base station eNB according to the present invention can determine which ues are to enter the sleep state according to the data transmission states of the ues, so that the physical uplink control channel resource can be provided to the ues needing to perform data transmission. In this way, the physical uplink control channel resources can be reduced to occupy the whole bandwidth of the system.
In an embodiment, when the operation processor 12 of the base station eNB determines to perform data transmission to the second UE2 and the second UE2 enters the active state from the inactive state in the active state, the second UE2 performs the channel state information reporting using the physical uplink control channel resource corresponding to the physical uplink control channel number. Specifically, in stage STG5, after the first UE1 completes the data transmission, the operation processor 12 of the base station eNB uses the sleep command drx_ce to make the first UE1 enter the inactive state. When determining that the second UE2 performs data transmission, the processor 12 of the base station eNB waits until the second UE2 enters the active state and continuously transmits a message to the second UE2. At this time, the second user equipment UE2 may perform channel state information reporting using the physical uplink control channel resource (Index 0), as shown in stage STG6 of fig. 1B. Since the first UE1 has already entered the inactive state at this time, the second UE2 uses the numbered resources for reporting without causing a collision. Next, as shown in stage STG7 of fig. 1B, after the second UE2 completes data transmission, the operation processor 12 of the base station eNB uses the sleep command drx_ce to make the second UE2 enter the inactive state. The sleep instruction drx_ce is a discontinuous reception command medium access control layer control unit (DRX Command of MAC CONTROL ELEMENT, DRX CE).
Referring to fig. 4A, fig. 4A is a flowchart of a method for allocating a csi report according to an embodiment of the invention. The method for allocating the csi feedback is applicable to a plurality of UEs, such as the first UE1 and the second UE2. As shown in fig. 4A, in step S201, the operation processor 11 of the base station eNB controls a Radio Resource Control (RRC) layer to respectively transmit an RRC configuration message to a plurality of ues, wherein the RRC configuration message includes a periodic csi reporting parameter and a discontinuous reception parameter. The periodic channel state information reporting parameter comprises reporting period, reporting time displacement and information of PUCCH resources, and the discontinuous receiving parameter comprises discontinuous receiving period, awakening time displacement and awakening duration.
In this embodiment, the operating state is determined by the discontinuous reception period, the wake-up time shift and the wake-up duration, and the status information reporting time is determined by the reporting period and the reporting time shift. In this embodiment, the ues are configured with the same reporting period and the same PUCCH resources according to the RRC configuration message.
In step S203, when the operation processor 11 of the base station eNB predicts that a plurality of conflicting ues of the ues will simultaneously perform the channel state information reporting according to the operation states of the ues, the base station eNB determines that one of the plurality of conflicting ues will perform the channel state information reporting. In step S205, the base station eNB sends a sleep command to other conflicting ues except for the conflicting ues that can perform the channel state information reporting.
Referring to fig. 4B, fig. 4B is a flowchart of a method for allocating a csi report according to another embodiment of the invention. Fig. 4B is substantially the same as the step of fig. 4A, except that fig. 4B further includes step S307. In step S307, the other ue collision device enters an inactive state in the active state according to the sleep command and stops using the PUCCH resource to perform the channel state information reporting.
For example, if the base station eNB predicts that the first UE1 and the second UE2 will perform the csi reporting at a time of reporting the csi according to the operation status, the base station eNB may determine to let the first UE1 perform the csi reporting by using the PUCCH resources according to the data transmission status of the first UE1 and the second UE2, and on the other hand send a sleep command to the second UE2 to make the second UE2 enter the inactive state for a duration of wakeup, so as to avoid resource collision caused by using the same PUCCH resources as the first UE 1.
The foregoing embodiments mainly utilize the sleep command sent by the base station eNB to force the ue that does not perform data transmission to enter the sleep state, so as to dynamically allocate the physical uplink control channel resources to the ue for periodic reporting of the channel state information, so as to achieve the purpose of improving the usage benefit of the physical uplink control channel resources and further reduce the overall requirement for the physical uplink control channel resources. In another embodiment, the above object can be achieved by configuring the discontinuous reception period and the status information reporting period with specific period length relationships.
In detail, referring to fig. 1, fig. 5A and fig. 5B together, fig. 5A is a preliminary setup waveform diagram of a ue according to another embodiment of the present invention, and fig. 5B is an actual operation waveform diagram of the ue according to another embodiment of the present invention. In this embodiment, as shown in fig. 1, the base station eNB also has a memory 10, a communication module 11, and an arithmetic processor 12 that connects the memory 10 and the communication module 11. The operation processor 12 executes a scheduling algorithm to obtain a reporting period, a reporting time shift, and a discontinuous reception period corresponding to each ue, a wake-up time shift corresponding to each ue, and a wake-up duration corresponding to each ue, so that the wake-up period of each ue is not overlapped with the channel reporting time. Further, the operation processor 12 drives the communication module 11 to transmit an RRC configuration message to the ues, respectively, wherein the RRC configuration message includes the reporting period and the reporting time shift, and information of uplink control channel (PUCCH) resources. The RRC configuration message also includes a discontinuous reception period corresponding to each ue, a wake-up time shift corresponding to each ue, and a wake-up duration corresponding to each ue. In this embodiment, the RRC configuration messages transmitted to the ues have the same reporting period, the same reporting time shift and the same PUCCH resource information.
For example, as shown in the preliminary set waveform diagram of fig. 5A, the operation processor 12 obtains the state information reporting period C2, the reporting time shift SC, the discontinuous reception periods P1 'and P2' corresponding to the first UE and the second UE2, the wake-up time shifts SD1 and SD2, and the wake-up durations TD1 and TD2 by executing the scheduling algorithm. The processor 12 sends an RRC configuration message to the first UE1 and the second UE2 through the communication module 11, respectively. The RRC configuration message includes a status information reporting period C2, a reporting time shift SC, and information of PUCCH resources. The RRC configuration message further includes discontinuous reception periods P1 'and P2' corresponding to the first UE1 and the second UE2 and wake-up time shift and data transmission duration (e.g. DTP of fig. 5B) corresponding to the first UE1 and the second UE2. In this embodiment, the discontinuous reception periods P1 'and P2' are twice the status information reporting period C2. The factors described herein are merely illustrative, and the present invention is not limited thereto. In this embodiment, the first and second UE1, UE2 are configured with the same reporting period C2, the same reporting time (e.g. t 2) and the same PUCCH resource CSI2.
The operation processor 12 of the base station eNB may be configured to determine that one of the first ue and the second ue performs data transmission within the data transmission duration DTP. When the state information reporting time of the ue performing data transmission is within the data transmission duration DTP, the ue performing data transmission performs channel state information reporting, and the ues other than the ue performing data transmission do not perform channel state information reporting. The data transmission duration DTP is associated with the wakeup duration. The wake-up durations TD1 and TD2 may be used to determine wake-up periods DUP1 and DUP2 of the first and second UE1 and UE2, and the wake-up periods DUP1 and DUP2 are staggered (i.e. do not overlap) with the status information reporting time (e.g. t 2).
For the actual operation waveform diagram of fig. 5B, it is assumed that the operation processor 12 of the base station eNB determines that the first UE1 performs data transmission within the data transmission duration DTP, and the status information reporting time t2 is located in the data transmission duration DTP, the first UE1 uses the physical uplink control channel resource to perform the channel status information reporting CSI1. In this case, the second UE2 does not perform the channel state information reporting. The state information reporting time t2 is determined by the reporting period C2 and the reporting time shift SC, and the data transmission duration DTP is associated with the discontinuous reception period P1', the wake-up time shift SD1 and the wake-up duration TD1. In an actual operation example, as shown in fig. 5A and 5B, the operation processor 12 is configured to extend the wake-up duration TD1 by a period EP to generate the data transmission duration DTP. That is, when the first UE1 performs data transmission during the wakeup duration TD1, the operation processor 12 may extend the wakeup duration TD1 by a period EP to enable the first UE1 to continue transmitting data until the transmission is completed, because the wakeup duration TD1 is insufficient.
The base station properly configures the discontinuous receiving period and the state information reporting period, so that the wake-up period and the state information reporting time are staggered (i.e. not overlapped), thereby enabling the user equipment for data transmission to use the physical uplink control channel resource to execute channel state information reporting. Otherwise, the ue not performing data transmission does not perform the channel state information reporting.
Referring to fig. 6, fig. 6 is a flowchart of a method for allocating a csi report according to another embodiment of the invention. As shown in fig. 6, in step S401, the base station executes a scheduling algorithm to obtain a reporting period, a reporting time shift, and a discontinuous reception period corresponding to each of the plurality of ue, a wake-up time shift corresponding to each ue, and a wake-up duration corresponding to each ue, so that a wake-up period of each ue does not overlap with a channel reporting time.
In step S403, the base station transmits Radio Resource Control (RRC) configuration messages to the ues, respectively, wherein the RRC configuration messages include a reporting period, a reporting time shift, information of uplink control channel (PUCCH) resources, and a discontinuous reception period corresponding to each ue, a wake-up time shift corresponding to each ue, and a wake-up duration corresponding to each ue. The RRC configuration messages transmitted to the ues have the same reporting period, the same reporting time shift, and the same PUCCH resource information. In one embodiment, one of the reporting period C2 and the discontinuous reception period is N times as large as the other, and N is a positive integer, but the invention is not limited thereto. Details of the flow steps in fig. 6 are described in the foregoing, and are not repeated here.
In one embodiment, the wake-up time shift has a first shift time SD and the return time shift has a second shift time SC, where the relationship (1) or (2) can be as follows:
or (b)
Wherein, PD1 is a first discontinuous reception cycle start point, PD2 is a second discontinuous reception cycle start point adjacent to the first discontinuous reception cycle start point, PC is the state information reporting cycle, SD is a first shift time, SC is a second shift time, TD is a wake-up duration, and n is a non-negative integer. When these parameters are brought in to establish the above relation, it is ensured that the channel state information report is in sleep state and does not overlap with the wake-up period.
In more detail, the above relation (1) can be converted into another relation (3): either pd1+sd+td < npc+sc < pd2+sd, or relation (2) can be converted to another relation (4): npc+sc < SD. From the above converted relations (3) and (4), it can be known that the CSI reporting CSI is within a range between pd1+sd+td and pd2+sd or less than SD, so that it is ensured that the CSI reporting is located at the sleep time TO and does not overlap with the wake-up period. The above concept will be described below in a practical example.
Referring to fig. 7, fig. 7 is a waveform diagram illustrating an operation according to an embodiment of the invention. Specifically, fig. 7 is a schematic waveform diagram illustrating discontinuous reception parameter DRX and channel state information reporting parameter CSI. The discontinuous reception parameter DRX comprises two wake-up durations TD and an intervening sleep time TO. Specifically, in order TO make the CSI reporting CSI in the sleep time TO, npc+sc is greater than pd1+sd+td and less than pd2+sd, where nPC is the starting point of the nth CSI reporting. The method of the present invention is TO configure the parameters TO conform TO the relation (1) or the relation (2), so that the time for reporting the CSI of the CSI can be located in the sleep time TO without overlapping with the wake-up period.
In an embodiment, the method further comprises the following steps: when the discontinuous receiving period is the same as the state information reporting period, determining the awakening duration time TD according to the load of data transmission; configuring a first displacement time SD to be in accordance with the relation 0 < SD < PD; when the sum of the first displacement time and the awakening duration time is smaller than the state information reporting period, configuring the second displacement time SC to be in accordance with SC < SD or SD+TD < SC < PC; when the sum of the first displacement time SD and the wake-up duration is greater than or equal to the state information reporting period, the second displacement time SC is set to accord with the relation mod (SD+TD, PC). Ltoreq.SC < SD. The following will describe a practical example in which the discontinuous reception period is the same as the status information reporting period.
Referring to fig. 8A-8B, fig. 8A-8B are operation waveforms respectively shown in different embodiments according to the present invention. Fig. 8A shows an embodiment when the sum of the first shift time SD and the wake-up duration TD is smaller than the status information reporting period PC. As shown in fig. 8A, the allowable reporting time of the CSI reporting on the CSI, i.e. the corresponding SC second shift time, may be in the range R1 of 0+.sc < SD or in the range R2 of sd+td+.sc < PC, so that the CSI reporting time is in the sleep state and does not overlap with the wake-up period. Fig. 8B shows an embodiment when the sum of the first shift time SD and the wake-up duration TD is greater than or equal to the status information reporting period PC. As shown in fig. 8B, the allowable reporting time of the CSI reporting the CSI, i.e., the corresponding second shift time SC, is mainly in the range R3 of mod (sd+td, PC). Ltoreq.sc < SD, i.e., in the sleep state without overlapping with the wake-up period.
In an embodiment, the method further includes determining a wakeup duration according to a load of the data transmission and configuring the wakeup duration to be less than the status information reporting period when the discontinuous reception period is k times the status information reporting period, wherein k is a positive integer; configuring the first displacement time to be equal to or less than 0 and less than SD < PD; when mod (SD, PC) < mod (SD+TD, PC), configuring the second shift time SC to correspond to 0.ltoreq.SC < mod (SD, PC) or mod (SD+TD, PC). Ltoreq.SC < PC; when mod (SD, PC). Gtoreq.mod (SD+TD, PC), the second displacement time SC is configured to correspond to mod (SD+TD, PC). Ltoreq.SC < mod (SD, PC). A practical example in which the discontinuous reception period is twice the state information reporting period (k=2) will be described below.
Referring to fig. 9A to 9B, fig. 9A to 9B are operation waveforms respectively shown in different embodiments according to the present invention. Fig. 9A shows an embodiment of mod (SD, PC) < mod (sd+td, PC). As shown in fig. 9A, in order to make the allowable reporting time of the CSI reporting the CSI, i.e. the corresponding second shifting time SC, not overlap with the wake-up period, the second shifting time SC may be selected to be located in a range R4 of 0+_sc < mod (SD, PC) or a range R5 of mod (sd+td, PC) +sc < PC, so that the reporting time of the CSI reporting the CSI is located in the sleep state. Fig. 9B shows an embodiment of mod (SD, PC) > mod (sd+td, PC). As shown in fig. 9B, in order to make the allowable reporting time of CSI for reporting CSI by channel state information, that is, the second shifting time SC, not overlap with the wake-up period, the second shifting time SC may be selected to be located in a range R6 of mod (sd+td, PC) +.sc < mod (SD, PC), so that the reporting time of CSI for reporting CSI by channel state information may be located in a sleep state.
In an embodiment, the method further includes: when the state information reporting period is k times of the discontinuous receiving period, determining the awakening duration according to the load of the data transmission and configuring the awakening duration to be smaller than the state information reporting period; configuring a first displacement time to be greater than or equal to 0 and less than a discontinuous reception period; when the sum of the first displacement time and the wake-up duration is smaller than the discontinuous reception period, configuring the second displacement time to accord with PD less than or equal to SC < mPD+SD or mPD+SD+TD < SC < (m+1) PD; when the sum of the first shift time and the wake-up duration is greater than or equal to the discontinuous reception period, setting the second shift time to conform to mpd+mod (sd+td, PD) < SC < mpd+sd; wherein k is a positive integer, and m is a positive integer less than k. A practical example in which the state information reporting period is twice (k=2) for the discontinuous reception period will be described below.
Referring to fig. 10A to 10B together, fig. 10A to 10B are operation waveforms respectively shown in different embodiments according to the present invention. Fig. 10A illustrates an embodiment in which the sum of the first displacement time and the wakeup duration is less than the discontinuous reception period. As shown in fig. 10A, in order to make the channel state information reporting CSI allowable reporting time, that is, the corresponding second shifting time SC, not overlap with the wake-up period, the second shifting time SC may be selected to be located in a range R7 where mPD is equal to or less than SC < mpd+sd, or in a range R8 where mpd+sd+td < SC < (m+1) PD, where m=0, 1. Fig. 10B shows that the sum of the first displacement time and the wakeup duration is greater than or equal to the discontinuous reception period. As shown in fig. 10B, in order that the channel state information reporting CSI can be performed for a reporting time, i.e., the second shifting time SC, which does not overlap with the wake-up period, the second shifting time SC may be selected to be configured to be in a range R9 consistent with mpd+mod (sd+td, PD) < SC < mpd+sd, where m=0, 1.
In summary, in the base station and the method for allocating the CSI report according to the present invention, when the expected CSI report collision occurs, the base station may dynamically allocate PUCCH resources to the ue for periodic CSI report by detecting the data amount in the current queue of the radio bearer of the ue. In addition, by properly configuring the status information reporting period and the discontinuous receiving period, when a ue is determined to transmit data, the ue can report the csi while the rest ues do not. Therefore, the base station and the method for allocating the channel state report can improve the use benefit of the uplink control channel resource, thereby reducing the overall requirement on the uplink control channel resource.

Claims (9)

1. A base station capable of allocating channel state rewards, comprising a memory, a communication module, and an operation processor signally connecting the memory and the communication module, and the operation processor is configured to perform:
driving the communication module to respectively send radio resource control configuration information to a plurality of user equipments, wherein the radio resource control configuration information comprises a periodic channel state information reporting parameter and a discontinuous receiving parameter, and the periodic channel state information reporting parameter comprises a reporting period, a reporting time displacement and information of physical uplink control channel resources, wherein the radio resource control configuration information sent to the user equipments comprises the same reporting period, the same reporting time displacement and the same information of the physical uplink control channel resources; and
and when the conflict user equipment in the user equipment is predicted to simultaneously execute channel state information reporting, determining that one of the conflict user equipment is to execute channel state information reporting and driving the communication module to send a dormancy instruction to other conflict user equipment except the conflict user equipment capable of executing channel state information reporting.
2. The base station capable of scheduling channel state rewards of claim 1 wherein the processor determines the conflicting user equipment to perform channel state information rewards based on data transmission states of the plurality of conflicting user equipment.
3. The base station of claim 1 wherein the processor predicts that the conflicting ues will perform the reporting of channel state information simultaneously based on a distribution of active and inactive states of the ues.
4. The base station capable of allocating channel state rewards of claim 1 wherein the processor drives the sleep instruction sent by the communication module to discontinuous reception command medium access control layer control unit (DRX Command of MAC CONTROL ELEMENT, DRX CE).
5. A method for allocating channel state rewards, comprising:
the base station respectively transmits a radio resource control configuration message to a plurality of user equipments, wherein the radio resource control configuration message comprises a periodic channel state information reporting parameter and a discontinuous receiving parameter, and the periodic channel state information reporting parameter comprises reporting period, reporting time displacement and information of physical uplink control channel resources; and
when the base station predicts that a plurality of conflict user equipment in the user equipment will execute channel state information reporting at the same time according to the operation states of the user equipment, the base station determines that one of the conflict user equipment will execute channel state information reporting and sends a dormancy instruction to other conflict user equipment except the conflict user equipment which can execute channel state information reporting;
wherein the rrc configuration messages sent to the ues include the same reporting period, the same reporting time offset, and the same information of the physical uplink control channel resources.
6. The method of claim 5, wherein the sleep instruction is configured to cause the other conflicting ue to enter an inactive state and cease using the physical uplink control channel resources to perform channel state information reporting.
7. The method of claim 5 wherein the determining that one of the plurality of conflicting ues will perform the reporting of channel state information comprises determining that the conflicting ue will perform the reporting of channel state information based on data transmission states of the plurality of conflicting ues.
8. The method of claim 5 wherein the base station predicts that the conflicting ues will perform the reporting of the csi simultaneously based on the distribution of the active and inactive states of the ues.
9. The method of claim 5, wherein the sleep command sent by the base station is a discontinuous reception command medium access control layer control unit (DRX Command of MAC CONTROL ELEMENT, DRX CE).
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