WO2015027469A1 - Downlink channel aggregation level determination method, device and system - Google Patents

Abstract

Embodiments of the present invention relate to a channel code rate determination method, a device and a system. The method comprises: a base station receiving channel quality related information of a downlink channel reported by a user equipment; the base station determining a Signal and Interference plus Noise Ratio (SINR) of the downlink channel based on the channel quality related information; the base station determining an aggregation level of the downlink channel based on the SINR of the downlink channel and a demodulation threshold that is set. This implements balancing between a system capacity and coverage performance.

Description

 Method, device and system for determining downlink channel aggregation level

The present invention relates to the field of communications technologies, and in particular, to a method, device, and system for determining a downlink channel aggregation level. A physical downlink control channel (PDCCH) is an important control channel in a Long Term Evolution (LTE) system, and is used for transmitting uplink control information (UCI) and downlink control information ( The downlink control information, DCI), where the DCI may include a public control command authorization, an uplink scheduling grant, a downlink scheduling grant, an uplink power control command, and the like. The modulation and coding mode of the PDCCH may be Quadrature Phase Shift Keying (QPSK), and the code rate of multiple PDCCHs may be selected in this modulation mode. If the code rate of the PDCCH is low, the demodulation performance of the PDCCH is good, but the PDCCH resources are wasted and the system throughput is reduced. If the code rate of the PDCCH is high, the demodulation performance of the PDCCH is poor, which may result in a decrease in system coverage performance.

 In the prior art, the PDCCH rate is set to a fixed value for different user equipments and different channel conditions, and it is difficult to balance system capacity and coverage performance. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method, a device, and a system for determining a downlink channel aggregation level to balance system capacity and coverage performance.

 In a first aspect, an embodiment of the present invention provides a method for determining a downlink channel aggregation level, including:

 Receiving, by the base station, channel quality related information reported by the user equipment;

 Determining, by the base station, a signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information;

The base station determines an aggregation level of the downlink channel according to an SINR of the downlink channel and a demodulation threshold of the downlink channel that is set. With reference to the first aspect, in a first implementation manner, the channel quality related information includes: channel quality information CQI; or the channel quality related information includes: a CQI, and a rank indication RI and a precoding matrix indicating a PMI at least one.

 With reference to the first aspect and the first implementation manner, in the second implementation manner, before the base station according to the SINR of the downlink channel and the set demodulation threshold, the base station further includes: the base station adopting according to the base station a multiple input multiple output MIMO mode, determining a format of downlink control information DCI; the base station determining the demodulation threshold according to the determined format of the DCI.

 With reference to the first aspect, the first implementation manner and the second implementation manner, in the third implementation manner, the set demodulation threshold includes: a demodulation threshold corresponding to an aggregation level of at least one downlink channel; Determining, by the base station, the aggregation level of the downlink channel according to the SINR of the downlink channel and the set demodulation threshold, the method includes: the base station respectively, corresponding to an aggregation level of the at least one downlink channel, an SINR of the downlink channel The demodulation threshold is compared; if the SINR of the downlink channel is greater than or equal to the demodulation threshold, the base station determines an aggregation level of the first downlink channel corresponding to the demodulation threshold as an aggregation of the downlink channel Level: if the SINR of the downlink channel is smaller than the demodulation threshold, the base station determines, as the downlink, a higher-level aggregation level of an aggregation level of the first downlink channel corresponding to the demodulation threshold The aggregation level of the channel.

 With reference to the first aspect, the first implementation manner, the second implementation manner, and the third implementation manner, in the fourth implementation manner, the base station determines, according to the SINR of the downlink channel and the set demodulation threshold. After the aggregation level of the downlink channel, the method further includes: determining, by the base station, whether a block error rate BLER of the downlink channel exceeds a set threshold; if a BLER of the downlink channel is greater than or equal to the set threshold, The base station increases the determined aggregation level of the downlink channel; if the BLER of the downlink channel is less than the set threshold, the base station decreases the determined aggregation level of the downlink channel.

With reference to the first aspect, the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, in the fifth implementation manner, the method further includes: determining, by the base station, the BLER of the downlink channel Whether it is greater than or equal to the set threshold; if the determined code rate corresponding to the aggregation level of the downlink channel is less than or equal to a set code rate, and the BLER of the downlink channel is greater than or equal to the set threshold, then The base station determines to increase the transmit power of the downlink channel. The higher the aggregation level of the downlink channel is, the lower the code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is. With reference to the first aspect, the first implementation manner, the second implementation manner, the third implementation manner, the fourth implementation manner, and the fifth implementation manner, in the sixth implementation manner, the base station determines to improve the After the transmit power of the downlink channel, the method further includes: if the BLER of the downlink channel is less than the set threshold, the base station determines to reduce the transmit power of the downlink channel.

 In a second aspect, an embodiment of the present invention provides a base station, including:

 a receiver, configured to receive channel quality related information of a downlink channel reported by the user equipment, and a processor, configured to determine, according to the channel quality related information, a signal to interference and noise ratio (SINR) of the downlink channel; according to the SINR of the downlink channel The set demodulation threshold determines the aggregation level of the downlink channel.

 With reference to the second aspect, in a first implementation manner, the channel quality related information includes: channel quality information CQI; or

 The channel quality related information includes: a CQI, and at least one of a rank indication RI and a precoding matrix indication PMI.

 With reference to the second aspect and the first implementation manner, in a second implementation manner, the processor is further configured to: determine, according to the multiple input multiple output MIMO mode adopted by the base station, a format of the downlink control information DCI; The determined format of the DCI determines the demodulation threshold.

 With reference to the second aspect, the first implementation manner and the second implementation manner, in the third implementation manner, the set demodulation threshold includes: a demodulation threshold corresponding to an aggregation level of the at least one downlink channel; The processor is specifically configured to: compare the SINR of the downlink channel with a demodulation threshold corresponding to an aggregation level of the at least one downlink channel; and if the SINR of the downlink channel is greater than or equal to the demodulation threshold, Determining, by the base station, an aggregation level of the first downlink channel corresponding to the demodulation threshold as an aggregation level of the downlink channel; if the SINR of the downlink channel is smaller than the demodulation threshold, the base station will use the solution The higher-level aggregation level of the aggregation level of the first downlink channel corresponding to the threshold is determined as the aggregation level of the downlink channel.

 With reference to the second aspect, the first implementation manner, the second implementation manner, and the third implementation manner, in the fourth implementation manner, the processor is specifically configured to: calculate the downlink according to the channel quality related information Channel quality information CQI value of the channel; calculating an SINR of the downlink reference signal according to the CQI value; calculating a SINFL of the downlink channel according to an SINR of the downlink reference signal

With reference to the second aspect, the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, in the fifth implementation manner, the processor is further configured to: determine the downlink Whether the block error rate BLER of the channel exceeds a set threshold; if the BLER of the downlink channel is greater than or equal to the set threshold, providing the determined aggregation level of the downlink channel; if the BLER of the downlink channel is smaller than The setting threshold reduces the determined aggregation level of the downlink channel.

 With reference to the second aspect, the first implementation manner, the second implementation manner, the third implementation manner, the fourth implementation manner, and the fifth implementation manner, in the sixth implementation manner, the processor is further used to Determining whether the BLER of the downlink channel is greater than or equal to the set threshold; if the determined code rate corresponding to the aggregation level of the downlink channel is less than or equal to a set code rate, and the BLER of the downlink channel is greater than or And equal to the set threshold, determining to increase the transmit power of the downlink channel; wherein, the higher the aggregation level of the downlink channel is, the lower the code rate is, and the lower the aggregation level of the downlink channel is, the higher the code rate is. high.

 With reference to the second aspect, the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, and the sixth embodiment, in the seventh embodiment, The processor is further configured to: after determining to increase the transmit power of the downlink channel, if the BLER of the downlink channel is less than the set threshold, determine to reduce the transmit power of the downlink channel.

 In a third aspect, an embodiment of the present invention provides a base station, including:

 a receiving module, configured to receive channel quality related information of a downlink channel reported by the user equipment, and a determining module, configured to determine, according to the channel quality related information, a signal to interference and noise ratio SINR of the downlink channel; according to the SINR of the downlink channel The set demodulation threshold determines the aggregation level of the downlink channel.

 With reference to the third aspect, in a first implementation manner, the channel quality related information includes: channel quality information CQI; or

 The channel quality related information includes: a CQI, and at least one of a rank indication RI and a precoding matrix indication PMI.

 With reference to the third aspect and the first implementation manner, in the second implementation manner, the determining module is further configured to: determine a format of the downlink control information DCI according to the multiple input multiple output MIMO mode adopted by the base station; The determined format of the DCI determines the demodulation threshold.

With reference to the third aspect, the first implementation manner and the second implementation manner, in the third implementation manner, the set demodulation threshold includes: a demodulation threshold corresponding to an aggregation level of at least one downlink channel; The determining module is specifically configured to: compare an SINR of the downlink channel with a demodulation threshold corresponding to an aggregation level of at least one downlink channel; and if the SINR of the downlink channel is greater than or And the base station determines, according to the demodulation threshold, an aggregation level of the first downlink channel corresponding to the demodulation threshold as an aggregation level of the downlink channel; if an SINR of the downlink channel is smaller than the demodulation threshold And determining, by the base station, a higher-level aggregation level of an aggregation level of the first downlink channel corresponding to the demodulation threshold as an aggregation level of the downlink channel.

 With reference to the third aspect, the first implementation manner, the second implementation manner, and the third implementation manner, in the fourth implementation manner, the determining module is specifically configured to: calculate the downlink according to the channel quality related information a channel quality information CQI value of the channel; calculating an SINR of the downlink reference signal according to the CQI value; calculating a SINFL of the downlink channel according to an SINR of the downlink reference signal, combining the third aspect, the first implementation manner, the second implementation The third embodiment and the fourth implementation manner, in the fifth implementation manner, the determining module is further configured to: determine whether a block error rate BLER of the downlink channel exceeds a set threshold; If the BLER of the downlink channel is greater than or equal to the set threshold, the determined aggregation level of the downlink channel is increased; if the BLER of the downlink channel is less than the set threshold, the determined downlink channel is decreased. Aggregation level.

 With reference to the third aspect, the first implementation manner, the second implementation manner, the third implementation manner, the fourth implementation manner, and the fifth implementation manner, in the sixth implementation manner, the determining module is further used to Determining whether the BLER of the downlink channel is greater than or equal to the set threshold; if the determined code rate corresponding to the aggregation level of the downlink channel is less than or equal to a set code rate, and the BLER of the downlink channel is greater than or And equal to the set threshold, determining to increase the transmit power of the downlink channel. The higher the aggregation level of the downlink channel is, the lower the code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is. high.

 With reference to the third aspect, the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, and the sixth embodiment, in the seventh embodiment, The determining module is further configured to: after determining to increase the transmit power of the downlink channel, if the BLER of the downlink channel is less than the set threshold, determine to reduce the transmit power of the downlink channel.

 In a fourth aspect, the embodiment of the present invention further provides a system for determining a downlink channel aggregation level, including a base station, and a user equipment that reports channel quality related information of a downlink channel to the base station; the base station includes:

a receiver, configured to receive channel quality related information of a downlink channel reported by the user equipment, and a processor, configured to determine, according to the channel quality related information, signal interference of the downlink channel The noise ratio SINR is determined according to the SINR of the downlink channel and the set demodulation threshold, and the aggregation level of the downlink channel is determined.

 With reference to the fourth aspect, in a first implementation manner, the channel quality related information includes: channel quality information CQI; or the channel quality related information includes: a CQI, and a rank indication RI and a precoding matrix indicating a PMI at least one.

 With reference to the fourth aspect and the first implementation manner, in the second implementation manner, the processor is further configured to: determine, according to the multiple input multiple output MIMO mode adopted by the base station, a format of the downlink control information DCI; The determined format of the DCI determines the demodulation threshold.

 With reference to the fourth aspect, the first implementation manner and the second implementation manner, in the third implementation manner, the set demodulation threshold includes: a demodulation threshold corresponding to an aggregation level of the at least one downlink channel; The processor is specifically configured to: compare the SINR of the downlink channel with a demodulation threshold corresponding to an aggregation level of the at least one downlink channel; and if the SINR of the downlink channel is greater than or equal to the demodulation threshold, Determining, by the base station, an aggregation level of the first downlink channel corresponding to the demodulation threshold as an aggregation level of the downlink channel; if the SINR of the downlink channel is smaller than the demodulation threshold, the base station will use the solution The higher-level aggregation level of the aggregation level of the first downlink channel corresponding to the threshold is determined as the aggregation level of the downlink channel.

 With reference to the fourth aspect, the first implementation manner, the second implementation manner, and the third implementation manner, in the fourth implementation manner, the processor is specifically configured to: calculate the downlink according to the channel quality related information Channel quality information CQI value of the channel; calculating an SINR of the downlink reference signal according to the CQI value; calculating a SINFL of the downlink channel according to an SINR of the downlink reference signal

 With reference to the fourth aspect, the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, in the fifth implementation manner, the processor is further configured to: determine the downlink channel Whether the block error rate BLER exceeds a set threshold; if the BLER of the downlink channel is greater than or equal to the set threshold, providing the determined aggregation level of the downlink channel; if the BLER of the downlink channel is smaller than When the threshold is set, the determined aggregation level of the downlink channel is lowered.

With reference to the fourth aspect, the first implementation manner, the second implementation manner, the third implementation manner, the fourth implementation manner, and the fifth implementation manner, in the sixth implementation manner, the processor is further used to Determining whether the BLER of the downlink channel is greater than or equal to the set threshold; if the determined code rate corresponding to the aggregation level of the downlink channel is less than or equal to a set code rate, and the BLER of the downlink channel is greater than or Equal to the set threshold, determining to increase the transmit power of the downlink channel; The lower the aggregation level of the downlink channel is, the lower the code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is.

 With reference to the fourth aspect, the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, and the sixth embodiment, in the seventh embodiment, The processor is further configured to: after determining to increase the transmit power of the downlink channel, if the BLER of the downlink channel is less than the set threshold, determine to reduce the transmit power of the downlink channel.

 The method, device and system for determining a downlink channel aggregation level provided by the embodiment of the present invention, the base station may determine the signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information reported by the user equipment on the downlink channel, and further, according to the SINR and the setting of the downlink channel. The demodulation threshold determines the aggregation level of the downlink channel to achieve both system capacity and coverage performance. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

 1 is a flow chart of an embodiment of a method for determining a downlink channel aggregation level according to the present invention;

 2 is a flow chart of still another embodiment of a method for determining a downlink channel aggregation level according to the present invention;

 3 is a flow chart of another embodiment of a method for determining a downlink channel aggregation level according to the present invention;

 4 is a flow chart of another embodiment of a method for determining a downlink channel aggregation level according to the present invention;

 FIG. 5 is a schematic structural diagram of an embodiment of a base station according to the present invention;

 6 is a schematic structural diagram of still another embodiment of a base station according to the present invention;

FIG. 7 is a schematic structural diagram of an embodiment of a system for determining a downlink channel aggregation level according to the present invention. detailed description The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

 The techniques described herein can be used in a variety of communication systems, such as current 2G, 3G communication systems and next generation communication systems, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA, Code Division Multiple). Access) system, Time Division Multiple Access (TDMA) system, Wideband Code Division Multiple Access (WCDMA), Frequency Division Multiple Addressing (FDMA) system, Orthogonal Frequency OFDM (Orthogonal Frequency-Division Multiple Access) system, single carrier FDMA (SC-FDMA) system, General Packet Radio Service (GPRS) system, Long Term Evolution (LTE) system, And other such communication systems.

 The user equipment involved in this application may be a wireless terminal. The wireless terminal can be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem. The wireless terminal can communicate with the core network via a wireless access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, such as They can be portable, pocket, handheld, computer built-in or in-vehicle mobile devices that exchange language and/or data with the wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), etc. . A wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, and an access point. Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipments

A base station (e.g., an access point) can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. For example, the base station can be a base station in GSM or CDMA (BTS, Base Transceiver Station), which may also be a base station (NodeB) in WCDMA, or an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node

B), this application is not limited.

 Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association that describes the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist, exist alone B these three situations. In addition, the character "/" in the present text generally indicates that the context of the context is an "or". FIG. 1 is a flowchart of an embodiment of determining a downlink channel aggregation level provided by the present invention. As shown in FIG. 1, the method includes :

 S101. The base station receives channel quality related information of a downlink channel reported by the user equipment.

 S102: The base station determines, according to the channel quality related information, a signal to interference and noise ratio of the downlink channel, SINFL.

 S103. The base station determines, according to the determined SINR of the downlink channel and the set demodulation threshold, an aggregation level of the downlink channel.

 The method for determining the downlink channel aggregation level according to the embodiment of the present invention is applicable to determining and adjusting the aggregation level of the downlink channels of the various communication systems involved. For example, it can be used to determine the aggregation level of the PDCCH channel in the LTE system. The downlink channel aggregation level determining process performed by the base station may be performed periodically, or may be triggered when the base station detects that the demodulation performance of the channel does not meet the actual requirement, or may detect that the system capacity does not meet the actual situation at the base station. Triggers execution when required. It can be understood that the base station can also perform execution by taking into consideration two factors: system performance and system capacity, and other factors that can trigger execution are not enumerated here.

 The information about the channel quality of the downlink channel that is received by the user equipment may include: channel quality information CQI; or, based on the CQI, the information reported by the user equipment may further include a Rank Indication (RI) and a pre- At least one of a Precoding Matrix Indicator (PMI).

 The base station may determine the signal to interference and noise ratio of the downlink channel according to the channel quality related information of the downlink channel reported by the user equipment. The base station may calculate the channel quality information CQI value of the downlink channel according to the channel quality related information.

Further, the base station may calculate the signal of the downlink reference signal according to the calculated CQI value. The Signal and Interference Plus Noise Ratio (SINR), that is, the SINR on the downlink pilot, and then the SINFL of the downlink channel is calculated according to the SINR of the downlink reference signal.

 In this embodiment, a specific implementation manner of calculating a SINR of a downlink reference signal according to a CQI value is provided. Specifically, the base station may perform a linear conversion on the CQI to obtain an SINR of the downlink reference signal, for example, SINR=k*CQI+b, where Both k and b are constants. It can be understood that, in the embodiment of the present invention, the manner of calculating the SINR of the downlink reference signal according to the CQI value is not limited.

 In this embodiment, a specific implementation manner of calculating an SINR of a downlink channel according to an SINR of a downlink reference signal is further provided. Specifically, the SINR is PDCCH=SINR+offset, where the SINR is the SINR of the downlink reference signal calculated according to the CQI value, and the offset is a set parameter.

 Optionally, if the information reported by the user equipment further includes the RI, the base station may calculate the SINFL of the downlink channel according to the RI and the CQI, for example: R1=2, indicating that the downlink signal is transmitted through the two downlink channels, and then the user equipment reports 2 The CQI of the downlink channel of the road. In this implementation scenario, the base station can calculate the integrated CQI of the downlink channel by using a certain algorithm for the CQI of the two downlink channels, and then use the CQI to calculate the SINFL of the downlink channel.

 Optionally, if the information reported by the user equipment further includes the PMI, the base station may perform a comprehensive calculation on the PMI and the CQI by using a certain algorithm to obtain the SINR of the downlink channel; if the information reported by the user equipment further includes the RI, the base station may PMI, RI and CQI are comprehensively calculated by a certain algorithm to obtain the SINFL of the downlink channel.

 After the base station calculates the SINR of the downlink channel, the base station determines the aggregation level of the downlink channel according to the SINR of the downlink channel and the set demodulation threshold.

 The aggregation level of the downlink channel refers to: The downlink channel is in one or more consecutive control channel elements

(Control Channel Element, CCE) The number of CCEs can be called the aggregation level of the downlink channel. Wherein, the set demodulation threshold can be characterized by SINR. When the base station calculates that the acquired SINR of the downlink channel is less than the set demodulation threshold, the base station may improve the aggregation level of the downlink channel. When the base station calculates that the acquired SINR of the downlink channel is greater than or equal to the set demodulation threshold, the base station may decrease. The aggregation level of the downstream channel. The downlink channel to be used in the embodiment of the present invention may be a PDCCH, and the aggregation level of the PDCCH is: The PDCCH is transmitted on one or more consecutive CCEs, and the number of CCEs is the aggregation level of the PDCCH.

 The following downlink channel is PDCCH as an example:

If SINR PDCCH ^ SINR1 AggLvl = 1;

 Else if SINR — PDCCH ^SINR2

 AggLvl = 2;

 Else if SINR — PDCCH ^ SINR3

 AggLvl = 4;

 Else AggLvl = 8;

 AggLvl indicates the aggregation level of the PDCCH; SINR-PDCCH indicates the SINR size of the PDCCH; SINRi indicates different SINR demodulation thresholds, i=1, 2, 3 and satisfies SINR1 > SINR2>SINR3.

 SINR1 is assumed to be 10dB, SINR2 is 5dB, and SINR3 is 2dB. If the base station calculates that the acquired SINR (ie, SINR_PDCCH) of the downlink channel is greater than or equal to 10 dB, the base station may determine that the aggregation level is AggLvl=1; if the base station calculates that the acquired downlink channel has an SINR less than 10 dB but greater than or equal to 5 dB, the base station You can increase the aggregation level from AggLvl = 1 to AggLvl = 2. Similarly, if the base station calculates that the acquired SINR (ie, SINR_PDCCH) of the downlink channel is greater than or equal to 5 dB and less than 10 dB, the base station may determine that the aggregation level is AggLvl=2; if the base station calculates that the acquired downlink channel has an SINR of less than 5 dB, However, if the ratio is greater than or equal to 2 dB, the base station can increase the aggregation level from AggLvl = 2 to AggLvl = 4. If the SINR (g卩SINR_PDCCH) of the obtained downlink channel is greater than or equal to 2 dB and less than 5 dB, the base station may determine that the aggregation level is AggLvl=4; if the base station calculates that the acquired SINR of the downlink channel is less than 2 dB, the base station The aggregation level can be increased from AggLvl = 4 to AggLvl = 8.

 It should be noted that the aggregation level of the downlink channel and the code rate of the downlink channel may be one-to-one correspondence. The higher the aggregation level of the downlink channel is, the lower the corresponding code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is. . Therefore, the base station performs an operation of increasing the aggregation level of the downlink channel, and can reduce the code rate of the downlink channel. Conversely, the aggregation rate can be lowered to raise the code rate of the downlink channel.

 The set demodulation threshold may be determined according to a format of the downlink control information DCI, where

The format of the DCI can be determined by the base station according to the Multiple-Input Multiple-Out-put (MIMO) mode adopted by the base station. The existing protocols stipulate that different MIMO modes correspond to different DCI formats, such as DCI formats DCI2 and DCI1 A corresponding to MIMO mode 3. Therefore, the DCI format can be determined according to the MIMO mode employed by the base station. Different DCI formats can set different demodulation thresholds. It should be noted that, in the embodiment of the present invention, the downlink signal is applied to the downlink channel by using the single carrier mode, and the downlink channel is also used for transmitting the downlink signal by using the carrier aggregation mode. The carrier aggregation refers to allowing the user equipment to be in the same transmission time. Interval (TTI) simultaneously transmits data in multiple cells, thereby increasing the peak rate of the user equipment. A user equipment supporting carrier aggregation may have multiple serving cells at the same time, and one serving cell is a cell in which the user equipment initiates access (random access or handover), and is called a primary serving cell (PCell) of the user equipment.

 The set demodulation threshold may include: a demodulation threshold corresponding to an aggregation level of at least one downlink channel, that is, an aggregation level of each downlink channel may respectively correspond to different demodulation thresholds, and the normal situation The higher the aggregation level of the downlink channel, the smaller the corresponding demodulation threshold. For example, the aggregation level of the downlink channel includes: aggregation level 1, aggregation level 2, aggregation level 4, and aggregation level 8, respectively, indicating the number of resources occupied by the channel, and the resource granularity is CCE (Contml Channel Element), for example: For the PDCCH channel, aggregation Level 1 indicates that the PDCCH channel contains 1 CCE, aggregation level 2 indicates that the PDCCH channel contains 2 CCEs, and so on. Correspondingly, the demodulation threshold corresponding to aggregation level 1 may be 10 dB, the demodulation threshold corresponding to aggregation level 2 may be 5 dB, the demodulation threshold corresponding to aggregation level 4 may be 2 dB, and the demodulation threshold corresponding to aggregation level 8 may be - 1 dB. The base station can compare the SINR of the downlink channel with the demodulation threshold corresponding to the aggregation level of the downlink channel, and determine the aggregation level of the downlink channel.

 Specifically, if the SINR of the downlink channel is greater than or equal to the demodulation threshold, the base station may determine the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel; for example, the SINR of the downlink channel is greater than or equal to the solution. If the threshold is 10 dB, the base station can determine the aggregation level 1 corresponding to the demodulation threshold of 10 dB as the demodulation threshold of the downlink channel. If the SINR of the downlink channel is smaller than the demodulation threshold, the base station may determine, as the aggregation level of the downlink channel, the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel; for example, the SINR of the downlink channel is less than 10 dB. The base station may determine the higher-level aggregation level 2 of the aggregation level 1 corresponding to the demodulation threshold of 10 dB as the aggregation level of the downlink channel.

 It should be noted that the higher the aggregation level of the downlink channel is, the lower the code rate is, and the lower the aggregation level of the downlink channel is, the higher the code rate is. Therefore, the base station determines the aggregation level of the downlink channel, that is, determines the code rate of the downlink channel.

After determining the aggregation level of the downlink channel, the base station may use the determined code rate corresponding to the downlink channel aggregation level, and send downlink data to the user equipment on the downlink channel, for example: The scheduling signaling is sent to schedule the uplink service of the user equipment.

 In the method for determining the downlink channel aggregation level provided by the embodiment, the base station may determine the signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information reported by the user equipment on the downlink channel, and further, according to the SINR of the downlink channel and the set demodulation threshold. Determine the aggregation level of the downlink channel to achieve both system capacity and coverage performance. 2 is a flow chart of still another embodiment of a method for determining an aggregation level of a downlink channel according to the present invention. As shown in FIG. 2, the method includes:

 S201. The user equipment acquires channel quality related information of the downlink channel.

 S202: The user equipment reports the channel quality related information of the downlink channel to the base station, so that the base station determines the signal to interference and noise ratio (SINR) of the downlink channel according to the channel quality related information, and determines the downlink according to the SINR of the downlink channel and the set demodulation threshold. The aggregation level of the channel.

 The user equipment may report the channel quality related information of the downlink channel to the base station periodically or under the control of the base station, where the channel quality related information may include: channel quality information CQI; or, based on the CQI, the channel quality related to the user equipment The information may also include at least one of an RI and a precoding matrix indicating PMI.

 The base station may determine the signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information of the downlink channel reported by the user equipment, and further calculate the SINR of the downlink reference signal according to the calculated CQI value, and further calculate the SINR according to the downlink reference signal. SINFL of the downlink channel Further, the base station may further determine the aggregation level of the downlink channel according to the SINR of the downlink channel and the set demodulation threshold. The foregoing process of determining the code rate of the downlink channel by the eNB may be performed periodically, and may be triggered according to factors such as the system performance and the system capacity. For the specific implementation process, refer to the related description in the embodiment shown in FIG. .

 After determining the aggregation level of the downlink channel, the base station may send scheduling signaling to the user equipment on the downlink channel by using the determined code rate corresponding to the aggregation level of the downlink channel, to schedule the uplink service of the user equipment.

In the method for determining the downlink channel aggregation level provided by the embodiment, the user equipment may report the channel quality related information of the downlink channel to the base station, and the base station may determine the signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information reported by the user equipment, and further The SINR of the downlink channel and the set demodulation threshold determine the aggregation level of the downlink channel, achieving both system capacity and coverage performance. FIG. 3 is a flowchart of another embodiment of a method for determining a downlink channel aggregation level according to the present invention. As shown in FIG. 3, based on the embodiments shown in FIG. 1 and FIG. 2, the base station is in accordance with the SINR and setting of the downlink channel. After the demodulation threshold is determined, after determining the aggregation level of the downlink channel, the determined aggregation level of the downlink channel may be further corrected according to the block error rate BLER condition of the downlink channel. Specifically include:

 S301. The base station determines whether the block error rate BLER of the downlink channel is greater than or equal to a set threshold. If yes, execute S302. Otherwise, execute S303.

 S302. The base station increases an aggregation level of the determined downlink channel.

 S303. The base station reduces the determined aggregation level of the downlink channel.

 In some implementation scenarios, for example, when the interference on the physical downlink shared channel (PDSCH) and the interference on the PDCCH are inconsistent, or the channel conditions are rapidly changed, the base station only uses the downlink channel reported by the user equipment. The information about the channel quality may not accurately determine the aggregation level of the downlink channel. In the above implementation scenario, optionally, the base station may further calculate a block error rate BLER of the downlink channel, so as to correct the determined aggregation level of the downlink channel according to the BLER condition.

 If the block error rate BLER of the downlink channel is greater than or equal to the set threshold, the base station may improve the determined aggregation level of the downlink channel, thereby reducing the code rate of the downlink channel to reduce the resource consumption of the downlink channel; and if the BLER is less than the setting The threshold may be used by the base station to reduce the aggregation level of the determined downlink channel, thereby improving the code rate of the downlink channel and improving the coverage performance of the downlink channel.

 It can be understood that the base station can determine the code rate of the downlink channel that should be reduced or increased according to the deviation between the block error rate BLER of the downlink channel and the set threshold, thereby further determining the aggregation level of the downlink channel that is increased or decreased. . The base station corrects the aggregation level of the downlink channel, so that the block error rate BLER of the downlink channel satisfies the set threshold.

 In addition, when the BLER of the downlink channel is greater than or equal to the set threshold, the base station may adjust the aggregation level to improve the coverage performance of the downlink channel; and when the BLER of the downlink channel is less than the set threshold, the base station may decrease. Aggregation level to reduce the resource consumption of the downlink channel.

In the method for determining a downlink channel aggregation level, the base station may determine a signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information of the downlink channel reported by the user equipment, and further, according to the SINR of the downlink channel and the set demodulation threshold. , determine the aggregation level of the downlink channel, Now take into account system capacity and coverage. On the basis of this, the base station can also correct the determined aggregation level of the downlink channel according to the BLER condition of the downlink channel, and further improve the coverage performance of the downlink channel and reduce the resource consumption of the downlink channel. 4 is a flowchart of another embodiment of a method for determining a downlink channel aggregation level according to the present invention. As shown in FIG. 4, based on the embodiments shown in FIG. 1, FIG. 2, and FIG. 3, a base station is in accordance with a SINR of a downlink channel. After determining the aggregation level of the downlink channel with the demodulation threshold of the downlink channel, or after the base station corrects the determined aggregation level of the downlink channel according to the block error rate BLER of the downlink channel, the downlink channel may also be determined according to the downlink channel. The block error rate BLER condition adjusts the transmit power of the downlink channel. Specifically include:

 S401. The base station receives channel quality related information of a downlink channel reported by the user equipment.

 The channel quality related information may include: channel quality information CQI; or, in addition to the CQI, at least one of RI and PMI may be further included.

 S402. The base station determines, according to channel quality related information, an SINR of the downlink reference signal.

 S403. The base station determines, according to an SINR of the downlink reference signal, a downlink channel (such as a PDCCH).

SINFL

 S404. The base station determines a demodulation threshold according to the DCI format.

 The execution of S404 is not in the order of S401-S403. For example, as shown in FIG. 4, S404 can be executed simultaneously with S401-S403, or before S401-S403, or the demodulation threshold is pre-configured.

 S405. The base station determines, according to the determined SINR of the downlink channel and the set demodulation threshold, an aggregation level of the downlink channel.

 S401-S405 can be referred to the related description in the embodiment shown in FIG. 1, and details are not described herein again.

 S406. The base station determines that the code rate corresponding to the aggregation level of the downlink channel is less than or equal to the set code rate. If yes, step S407 is performed, otherwise the process ends.

 S407: The base station determines whether the BLER of the downlink channel is greater than or equal to a set threshold, and if yes, executing S408.

 5408. The base station determines to increase the transmit power of the downlink channel.

After the base station performs S408 to determine to increase the transmit power of the downlink channel, if the BLER is less than the set threshold, the base station may further perform S409. S409. If the BLER is less than the set threshold, the base station determines to reduce the transmit power of the downlink channel. The set code rate can be set according to actual needs, for example: You can select the minimum code rate close to the downlink channel. If the determined code rate corresponding to the aggregation level of the downlink channel is close to the minimum value or reaches the minimum value and the demodulation performance of the downlink channel is still not guaranteed, and the gP, BLER is greater than or equal to the set threshold, the base station may transmit by lifting the downlink channel. The power method ensures proper demodulation of the downlink channel. After the base station increases the transmit power of the downlink channel, if the BLER is less than the set threshold, the base station can further reduce the transmit power of the downlink channel to an initial value.

 In the method for determining a downlink channel aggregation level, the base station may determine a signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information of the downlink channel reported by the user equipment, and further, according to the SINR of the downlink channel and the set demodulation threshold. Determine the aggregation level of the downlink channel to achieve both system capacity and coverage performance. On the basis of this, the base station can also correct the determined aggregation level of the downlink channel according to the BLER condition of the downlink channel, and further improve the coverage performance of the downlink channel and reduce the resource consumption of the downlink channel. On this basis, the base station can also adjust the transmit power of the downlink channel according to the block error rate BLER condition of the downlink channel to ensure correct demodulation of the downlink channel. FIG. 5 is a schematic structural diagram of an embodiment of a base station according to the present invention. As shown in FIG. 5, the base station includes: a receiver 11 and a processor 12;

 The receiver 11 is configured to receive channel quality related information of the downlink channel reported by the user equipment, and the processor 12 is configured to determine a signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information, and set the SINR according to the SINR of the downlink channel. The demodulation threshold determines the aggregation level of the downlink channel.

 Optionally, the channel quality related information of the downlink channel may include: channel quality information CQI; or, the channel quality related information may include: CQI, and at least one of a rank indication RI and a precoding matrix indication PMI.

 Optionally, the processor 12 is further configured to: determine a format of the downlink control information DCI according to the multiple input multiple output MIMO mode used by the base station; and determine a demodulation threshold according to the determined format of the DCI.

Optionally, the demodulation threshold set by the foregoing includes: a demodulation threshold corresponding to an aggregation level of the at least one downlink channel; The processor 12 may be specifically configured to compare the SINR of the downlink channel with a demodulation threshold corresponding to the aggregation level of the at least one downlink channel, and if the SINR of the downlink channel is greater than or equal to the demodulation threshold, the base station corresponding to the demodulation threshold The aggregation level of the first downlink channel is determined as the aggregation level of the downlink channel; if the SINR of the downlink channel is less than the demodulation threshold, the base station will demodulate the higher aggregation level of the aggregation level of the first downlink channel corresponding to the threshold Determined as the aggregation level of the downstream channel.

 Optionally, the processor 12 may be specifically configured to: calculate a channel quality information CQI value of the downlink channel according to the channel quality related information; calculate a SINR of the downlink reference signal according to the CQI value; and calculate a SINFL of the downlink channel according to the SINR of the downlink reference signal.

 Optionally, the processor 12 is further configured to: determine whether a block error rate BLER of the downlink channel exceeds a set threshold; if the BLER of the downlink channel is greater than or equal to a set threshold, increase the determined aggregation level of the downlink channel; If the BLER of the downlink channel is less than the set threshold, the determined aggregation level of the downlink channel is lowered.

 Optionally, the processor 12 is further configured to: determine whether a BLER of the downlink channel is greater than or equal to a set threshold; if the determined code rate corresponding to the aggregation level of the downlink channel is less than or equal to a set code rate, and the downlink channel If the BLER is greater than or equal to the set threshold, it is determined that the transmit power of the downlink channel is increased. The higher the aggregation level of the downlink channel is, the lower the code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is. .

 Optionally, the processor 12 is further configured to: after determining to increase the transmit power of the downlink channel, if the BLER of the downlink channel is less than a set threshold, determine to reduce the transmit power of the downlink channel.

 Specifically, the base station according to the embodiment of the present invention is applicable to determining and adjusting aggregation levels of downlink channels of various communication systems. For example: It can be used to determine the code rate of the PDCCH channel in the LTE system. The determining process of the downlink channel aggregation level performed by the processor 12 may be performed periodically, or may be triggered when the processor 12 detects that the demodulation performance of the channel does not meet the actual requirement, or may be in the processor 12 Triggered execution when it detects that the system capacity does not meet the actual demand. It can be understood that the processor 12 can also perform execution by considering both system performance and system capacity, and other factors that can trigger execution are not enumerated here.

 The information about the channel quality of the downlink channel that the receiver 11 receives the user equipment may include: channel quality information CQI; or, based on the CQI, the information reported by the user equipment may further include at least one of the RI and the PMI.

The processor 12 can be determined according to the channel quality related information of the downlink channel reported by the user equipment. The signal to interference and noise ratio SINR of the fixed downlink channel. Specifically, the processor 12 may calculate the channel quality information CQI value of the downlink channel by using various existing methods according to the channel quality related information.

 Further, the processor 12 may calculate the SINR of the downlink reference signal, that is, the SINR on the downlink pilot, according to the calculated CQI value, and further calculate the SINFL of the downlink channel according to the SINR of the downlink reference signal.

 In this embodiment, a specific implementation manner of calculating the SINR of the downlink reference signal according to the CQI value is provided. Specifically, the processor 12 may perform linear conversion on the CQI to obtain an SINR, for example: SINR=k*CQI+b, where k and b is a constant. It can be understood that, in the embodiment of the present invention, the manner of calculating the SINR of the downlink reference signal according to the CQI value is not limited, and various methods may be used for calculation.

 In this embodiment, a specific implementation manner of calculating an SINR of a downlink channel according to an SINR of a downlink reference signal is further provided. Specifically, the SINR is PDCCH=SINR+offset, where the SINR is the SINR of the downlink reference signal calculated according to the CQI value, and the offset is a set parameter.

 Optionally, if the information reported by the user equipment further includes the RI, the processor 12 may calculate the SINFL of the downlink channel according to the RI and the CQI, for example: R1=2, indicating that the downlink signal is transmitted through the two downlink channels, and the user equipment Report the CQI of the 2 downlink channels. In this implementation scenario, the processor 12 can calculate the integrated CQI of the downlink channel by using a certain algorithm for the CQI of the two downlink channels, and then use the CQI to calculate the SINFL of the downlink channel.

 Optionally, if the information reported by the user equipment further includes the PMI, because the PMI reflects the direct connection of the downlink channel, the processor 12 may perform a comprehensive calculation on the PMI and the CQI through a certain algorithm to obtain the SINR of the downlink channel; When the information reported by the device also includes the RI scenario, the processor 12 may perform a comprehensive calculation on the PMI, the RI, and the CQI through a certain algorithm to obtain the SINFL of the downlink channel.

 After calculating the SINR of the downlink channel, the processor 12 may determine the aggregation level of the downlink channel according to the SINR of the downlink channel and the set demodulation threshold. Wherein, the set demodulation threshold can be characterized by SINR. When the processor 12 calculates that the acquired SINR of the downlink channel is less than the set demodulation threshold, the processor 12 may increase the aggregation level of the downlink channel; when the processor 12 calculates that the acquired SINR of the downlink channel is greater than or equal to the set demodulation Threshold, processor 12 can reduce the aggregation level of the downstream channel.

SINR1 is assumed to be 10dB, SINR2 is 5dB, and SINR3 is 2dB. If processor 12 If the SINR (ie, SINR_PDCCH) of the obtained downlink channel is greater than or equal to 10 dB, the processor 12 may determine that the aggregation level is AggLvl=1; if the processor 12 calculates that the acquired SINR of the downlink channel is less than 10 dB, but is greater than or equal to 5 dB, Processor 12 can then raise the aggregation level from AggLvl = 1 to AggLvl = 2. Similarly, if the processor 12 calculates that the acquired SINR (g卩SINR_PDCCH) of the downlink channel is greater than or equal to 5 dB and less than 10 dB, the processor 12 may determine that the aggregation level is AggLvl=2; if the processor 12 calculates the acquired The SINR of the downlink channel is less than 5 dB but greater than or equal to 2 dB, and the processor 12 can increase the aggregation level from AggLvl = 2 to AggLvl = 4. If the processor 12 calculates that the acquired SINR (ie, SINR_PDCCH) of the downlink channel is greater than or equal to 2 dB and less than 5 dB, the processor 12 may determine that the aggregation level is AggLvl=4; if the processor 12 calculates the acquired SINR of the downlink channel Less than 2 dB, processor 12 can increase the aggregation level from AggLvl = 4 to AggLvl = 8.

 It should be noted that the aggregation level of the downlink channel and the code rate of the downlink channel may be one-to-one correspondence. The higher the aggregation level of the downlink channel is, the lower the corresponding code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is. . Therefore, the processor 12 can improve the aggregation level of the downlink channel to achieve a reduced code rate. Conversely, the aggregation level of the downlink channel can be reduced to achieve an elevated code rate.

 The set demodulation threshold may be determined according to a format of the downlink control information DCI, where the format of the DCI may be determined by the processor 12 according to the adopted MIMO mode. The existing protocols stipulate that different MIMO modes correspond to different DCI formats, such as DCI formats DCI2 and DCI1 A corresponding to MIMO mode 3. Therefore, the DCI format can be determined based on the MIMO mode employed by the processor 12. Different DCI formats can set different demodulation thresholds.

 It should be noted that, in the embodiment of the present invention, the downlink signal is applied to the downlink channel by using the single carrier mode, and the downlink channel is also used for transmitting the downlink signal by using the carrier aggregation mode. The carrier aggregation refers to allowing the user equipment to be in the same transmission time. Interval (TTI) simultaneously transmits data in multiple cells, thereby increasing the peak rate of the user equipment. A user equipment supporting carrier aggregation may have multiple serving cells at the same time, and one serving cell is a cell in which the user equipment initiates access (random access or switching), and is called a primary serving cell (PCell) of the user equipment.

The set demodulation threshold may include: a demodulation threshold corresponding to an aggregation level of at least one downlink channel, that is, an aggregation level of each downlink channel may respectively correspond to different demodulation thresholds, and the normal situation The higher the aggregation level of the downlink channel, the smaller the corresponding demodulation threshold. For example: The aggregation level of the downlink channel includes: aggregation level 1, aggregation level 2, aggregation level 4, and aggregation. Level 8 indicates the number of resources occupied by the channel, and the resource granularity is CCE. For example, for the PDCCH channel, the aggregation level 1 indicates that the PDCCH channel contains one CCE, the aggregation level 2 indicates that the PDCCH channel contains two CCEs, and so on. . Correspondingly, the demodulation threshold corresponding to aggregation level 1 may be 10 dB, the demodulation threshold corresponding to aggregation level 2 may be 5 dB, the demodulation threshold corresponding to aggregation level 4 may be 2 dB, and the demodulation threshold corresponding to aggregation level 8 may be - 1 dB. The processor 12 may compare the SINR of the downlink channel with a demodulation threshold corresponding to the aggregation level of the downlink channel, respectively, to determine an aggregation level of the downlink channel. Specifically, if the SINR of the downlink channel is greater than or equal to the demodulation threshold, the processor 12 may determine the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel, if the SINR of the downlink channel is less than the demodulation. For the threshold, the processor 12 may determine the higher-level aggregation level of the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel, and the higher the aggregation level of the downlink channel, the lower the corresponding code rate. The lower the aggregation level of the downlink channel, the higher the code rate. Therefore, the processor 12 determines the aggregation level of the downlink channel, that is, determines the code rate of the downlink channel.

 After the processor 12 determines the aggregation level of the downlink channel, the downlink data may be sent to the user equipment on the downlink channel by using the determined code rate corresponding to the downlink channel aggregation level, for example, sending scheduling signaling to the user equipment, etc., to schedule Uplink service of user equipment.

 The base station provided by this embodiment corresponds to the method for determining the downlink channel aggregation level provided by the embodiment of the present invention. The specific process for determining the channel aggregation level is performed by the execution device of the downlink channel aggregation level determining method. The related descriptions in the embodiment shown in FIG. 1, FIG. 3 and FIG. 4 are not described herein again.

 The base station provided in this embodiment may determine the signal to interference and noise ratio (SINR) of the downlink channel according to the channel quality related information of the downlink channel reported by the user equipment, and determine the aggregation level of the downlink channel according to the SINR of the downlink channel and the set demodulation threshold. , to achieve both system capacity and coverage performance. FIG. 6 is a schematic structural diagram of still another embodiment of a base station according to the present invention. As shown in FIG. 6, the base station includes:

The receiving module 21 is configured to receive channel quality related information of the downlink channel reported by the user equipment, where the determining module 22 is configured to determine a signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information, and set the SINR according to the SINR of the downlink channel. The demodulation threshold determines the aggregation level of the downlink channel. Optionally, the channel quality related information includes: channel quality information CQI; or, the channel quality related information includes: CQI, and at least one of a rank indication RI and a precoding matrix indication PMI.

 Optionally, the determining module 22 is further configured to: determine a format of the downlink control information DCI according to the multiple input multiple output MIMO mode used by the base station; and determine a demodulation threshold according to the determined format of the DCI.

 Optionally, the set demodulation threshold includes: a demodulation threshold corresponding to an aggregation level of the at least one downlink channel;

 The determining module 22 may be specifically configured to: compare the SINR of the downlink channel with a demodulation threshold corresponding to the aggregation level of the at least one downlink channel; and if the SINR of the downlink channel is greater than or equal to the demodulation threshold, the base station corresponding to the demodulation threshold The aggregation level of the first downlink channel is determined as the aggregation level of the downlink channel; if the SINR of the downlink channel is less than the demodulation threshold, the base station will demodulate the higher aggregation level of the aggregation level of the first downlink channel corresponding to the threshold Determined as the aggregation level of the downstream channel.

 Optionally, the determining module 22 may be specifically configured to: calculate a channel quality information CQI value of the downlink channel according to the channel quality related information; calculate an SINR of the downlink reference signal according to the CQI value; and calculate a SINFL of the downlink channel according to the SINR of the downlink reference signal.

 Optionally, the determining module 22 is further configured to: determine whether a block error rate BLER of the downlink channel exceeds a set threshold; if the BLER of the downlink channel is greater than or equal to a set threshold, increase the determined aggregation level of the downlink channel; If the BLER of the downlink channel is less than the set threshold, the determined aggregation level of the downlink channel is lowered.

 Optionally, the determining module 22 is further configured to: determine whether a BLER of the downlink channel is greater than or equal to a set threshold; if the determined code rate corresponding to the aggregation level of the downlink channel is less than or equal to a set code rate, and the downlink channel is If the BLER is greater than or equal to the set threshold, it is determined that the transmit power of the downlink channel is increased. The higher the aggregation level of the downlink channel is, the lower the code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is. .

 Optionally, the determining module 22 is further configured to: after determining to improve the transmit power of the downlink channel, if the BLER of the downlink channel is less than the set threshold, determine to reduce the transmit power of the downlink channel.

The base station according to the embodiment of the present invention is applicable to determining and adjusting aggregation levels of downlink channels of various communication systems. For example: It can be used to determine the code rate of the PDCCH channel in the LTE system. The process of determining the downlink channel aggregation level performed by the processor 12 may be performed periodically, or The execution may also be triggered when the processor 12 detects that the demodulation performance of the channel does not meet the actual requirement, or may trigger the execution when the processor 12 detects that the system capacity does not meet the actual requirement. It can be understood that the processor 12 can also perform execution by taking into consideration both system performance and system capacity. The other factors that can trigger execution are not enumerated here.

 The receiving, by the receiving module 21, the channel quality related information of the downlink channel that is reported by the user equipment may include: channel quality information CQI; or, based on the CQI, the information reported by the user equipment may further include at least one of the RI and the PMI.

 The determining module 22 may determine the signal to interference and noise ratio of the downlink channel according to the channel quality related information of the downlink channel reported by the user equipment. The determining module 22 may calculate the downlink channel by using various existing methods according to the channel quality related information. Channel quality information CQI value.

 Further, the determining module 22 may calculate the SINR of the downlink reference signal, that is, the SINR of the downlink pilot, according to the calculated CQI value, and further calculate the SINFL of the downlink channel according to the SINR of the downlink reference signal.

 In this embodiment, a specific implementation manner of calculating the SINR of the downlink reference signal according to the CQI value is provided. Specifically, the determining module 22 may perform linear conversion on the CQI to obtain an SINR, for example: SINR=k*CQI+b, where k and b is a constant. It can be understood that, in the embodiment of the present invention, the manner of calculating the SINR of the downlink reference signal according to the CQI value is not limited, and various methods may be used for calculation.

 In this embodiment, a specific implementation manner of calculating an SINR of a downlink channel according to an SINR of a downlink reference signal is further provided. Specifically, the SINR is PDCCH=SINR+offset, where the SINR is the SINR of the downlink reference signal calculated according to the CQI value, and the offset is a set parameter.

 Optionally, if the information reported by the user equipment further includes the RI, the determining module 22 may calculate the SINFL of the downlink channel according to the RI and the CQI, for example: R1=2, indicating that the downlink signal is transmitted through the two downlink channels, and the user equipment Report the CQI of the 2 downlink channels. In this implementation scenario, the determining module 22 may calculate the integrated CQI of the downlink channel by using a certain algorithm for the CQI of the two downlink channels, and then use the CQI to calculate the SINFL of the downlink channel.

Optionally, if the information reported by the user equipment further includes the PMI, because the PMI reflects the direct connection of the downlink channel, the determining module 22 may perform a comprehensive calculation on the PMI and the CQI through a certain algorithm to obtain the SINR of the downlink channel; If the information reported by the device also includes the RI scenario, the determining module 22 may perform a comprehensive calculation on the PMI, the RI, and the CQI through a certain algorithm. The SINR of the line channel.

 After determining the SINR of the downlink channel, the determining module 22 may determine the aggregation level of the downlink channel according to the SINR of the downlink channel and the set demodulation threshold. Among them, the set demodulation threshold can be characterized by SINR. When the determining module 22 calculates that the acquired SINR of the downlink channel is less than the set demodulation threshold, the determining module 22 may increase the aggregation level of the downlink channel; when the determining module 22 calculates that the acquired SINR of the downlink channel is greater than or equal to the set demodulation Threshold, the determination module 22 can reduce the aggregation level of the downstream channel.

 SINR1 is assumed to be 10dB, SINR2 is 5dB, and SINR3 is 2dB. If the determining module 22 calculates that the acquired SINR (g卩SINR_PDCCH) of the downlink channel is greater than or equal to 10 dB, the determining module 22 may determine that the aggregation level is AggLvl=1; if the determining module 22 calculates that the acquired downlink channel has an SINR of less than 10 dB, But greater than or equal to 5 dB, the determination module 22 can increase the aggregation level from AggLvl = 1 to AggLvl = 2. Similarly, if the determining module 22 calculates that the acquired SINR (ie, SINR_PDCCH) of the downlink channel is greater than or equal to 5 dB and less than 10 dB, the determining module 22 may determine that the aggregation level is AggLvl=2; if the determining module 22 calculates the acquired downlink The SINR of the channel is less than 5 dB but greater than or equal to 2 dB, then the determination module 22 can increase the aggregation level from AggLvl = 2 to AggLvl = 4. If the determining module 22 calculates that the acquired SINR (ie, SINR_PDCCH) of the downlink channel is greater than or equal to 2 dB and less than 5 dB, the determining module 22 may determine that the aggregation level is AggLvl=4; if the determining module 22 calculates the acquired SINR of the downlink channel. Less than 2 dB, the determination module 22 can increase the aggregation level from AggLvl = 4 to AggLvl = 8.

 It should be noted that the aggregation level of the downlink channel and the code rate of the downlink channel may be one-to-one correspondence. The higher the aggregation level of the downlink channel is, the lower the corresponding code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is. . Therefore, the determining module 22 increases the aggregation level of the downlink channel to achieve a reduced code rate. Conversely, lowering the aggregation level of the downlink channel can achieve an elevated code rate.

 The set demodulation threshold may be determined according to a format of the downlink control information DCI, where

The format of the DCI can be determined by the determination module 22 based on the MIMO mode employed. The existing protocols stipulate that different MIMO modes correspond to different DCI formats, such as DCI formats DCI2 and DCI1 A corresponding to MIMO mode TM3. Therefore, the DCI format can be determined based on the MIMO mode employed by the determination module 22. Different DCI formats can set different demodulation thresholds.

It should be noted that, in the embodiment of the present invention, the downlink channel is applied in a single carrier manner. The downlink signal is also applicable to the downlink channel, which uses the carrier aggregation mode to transmit the downlink signal. The carrier aggregation refers to allowing the user equipment to simultaneously transmit data in multiple cells in the same transmission time interval (TTI), thereby improving the peak rate of the user equipment. . A user equipment supporting carrier aggregation may have multiple serving cells at the same time, and one serving cell is a cell in which the user equipment initiates access (random access or handover), and is called a primary serving cell (PCell) of the user equipment.

 The set demodulation threshold may include: a demodulation threshold corresponding to an aggregation level of at least one downlink channel, that is, an aggregation level of each downlink channel may respectively correspond to different demodulation thresholds, and the normal situation The higher the aggregation level of the downlink channel, the smaller the corresponding demodulation threshold. For example, the aggregation level of the downlink channel includes: aggregation level 1, aggregation level 2, aggregation level 4, and aggregation level 8, respectively, indicating the number of resources occupied by the channel, and the resource granularity is CCE, for example: For the PDCCH channel, aggregation level 1 indicates the PDCCH. The channel contains 1 CCE, aggregation level 2 indicates that the PDCCH channel contains 2 CCEs, and so on.

 Correspondingly, the demodulation threshold corresponding to aggregation level 1 may be 10 dB, the demodulation threshold corresponding to aggregation level 2 may be 5 dB, the demodulation threshold corresponding to aggregation level 4 may be 2 dB, and the demodulation threshold corresponding to aggregation level 8 may be - 1 dB. The determining module 22 may compare the SINR of the downlink channel with a demodulation threshold corresponding to the aggregation level of the downlink channel, respectively, to determine an aggregation level of the downlink channel. Specifically, if the SINR of the downlink channel is greater than or equal to the demodulation threshold, the determining module 22 may determine the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel, if the SINR of the downlink channel is less than the demodulation. The threshold module determines that the higher-level aggregation level of the aggregation level of the first downlink channel corresponding to the demodulation threshold is determined as the aggregation level of the downlink channel, and the higher the aggregation level of the downlink channel is, the lower the corresponding code rate is. The lower the aggregation level of the downlink channel, the higher the code rate. Therefore, the determining module 22 determines the aggregation level of the downlink channel, that is, determines the code rate of the downlink channel.

 After the determining module 22 determines the aggregation level of the downlink channel, the downlink data may be sent to the user equipment on the downlink channel by using the determined code rate corresponding to the downlink channel aggregation level, for example, sending scheduling signaling to the user equipment, etc., to schedule Uplink service of user equipment.

 The base station provided by this embodiment corresponds to the method for determining the downlink channel aggregation level provided by the embodiment of the present invention. The specific process for determining the channel aggregation level is performed by the execution device of the downlink channel aggregation level determining method. The related descriptions in the embodiment shown in FIG. 1, FIG. 3 and FIG. 4 are not described herein again.

The base station provided in this embodiment may be based on the channel quality of the downlink channel reported by the user equipment. The information determines the signal to interference and noise ratio SINR of the downlink channel, and further determines the aggregation level of the downlink channel according to the SINR of the downlink channel and the set demodulation threshold, thereby achieving both system capacity and coverage performance. FIG. 7 is a schematic structural diagram of an embodiment of a system for determining a downlink channel aggregation level according to the present invention. The system includes a base station 31, and a user equipment 32 that reports channel quality related information of a downlink channel to a base station;

 The base station 31 includes: a receiver, configured to receive channel quality related information of a downlink channel reported by the user equipment, and a processor, configured to determine a signal to interference and noise ratio SINR of the downlink channel according to the channel quality related information; and according to the SINR of the downlink channel Set the demodulation threshold to determine the aggregation level of the downlink channel.

 Optionally, the channel quality related information includes: channel quality information CQI; or, the channel quality related information includes: CQI, and at least one of a rank indication RI and a precoding matrix indication PMI.

 Optionally, the processor is further configured to: determine a format of the downlink control information DCI according to the multiple input multiple output MIMO mode used by the base station; and determine a demodulation threshold according to the determined format of the DCI.

 Optionally, the set demodulation threshold includes: a demodulation threshold corresponding to an aggregation level of the at least one downlink channel; the processor is specifically configured to: a solution corresponding to an SINR of the downlink channel and an aggregation level of the at least one downlink channel respectively If the SINR of the downlink channel is greater than or equal to the demodulation threshold, the base station determines the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel; if the SINR of the downlink channel is less than the demodulation threshold Then, the base station determines, as the aggregation level of the downlink channel, the higher-level aggregation level of the aggregation level of the first downlink channel corresponding to the demodulation threshold.

 Optionally, the processor is specifically configured to: calculate a channel quality information CQI value of the downlink channel according to the channel quality related information; calculate a SINR of the downlink reference signal according to the CQI value; and calculate a SINFL of the downlink channel according to the SINR of the downlink reference signal.

 Optionally, the processor is further configured to: determine whether a block error rate BLER of the downlink channel exceeds a set threshold; if the BLER of the downlink channel is greater than or equal to a set threshold, provide the determined aggregation level of the downlink channel; If the BLER of the channel is less than the set threshold, the determined aggregation level of the downlink channel is lowered.

Optionally, the processor is further configured to: determine whether a BLER of the downlink channel is greater than or equal to a set threshold; if the determined code rate corresponding to the aggregation level of the downlink channel is less than or equal to a set code rate, and a BLER of the downlink channel is greater than Or equal to setting a threshold, determining to increase the transmit power of the downlink channel; The higher the aggregation level of the downlink channel is, the lower the code rate is. The lower the aggregation level of the downlink channel is, the higher the code rate is.

 Optionally, the processor is further configured to: after determining to increase the transmit power of the downlink channel, if the BLER of the downlink channel is less than a set threshold, determine to reduce the transmit power of the downlink channel.

 The system for determining the downlink channel aggregation level provided in this embodiment, and the structure of the base station included in the base station may be referred to the related description in the embodiment shown in FIG. 5, and details are not described herein again.

 In the determining system of the downlink channel aggregation level provided by the embodiment, the base station may determine the signal to interference and noise ratio (SINR) of the downlink channel according to the channel quality related information of the downlink channel reported by the user equipment, and further, according to the SINR of the downlink channel and the set demodulation threshold. Determine the aggregation level of the downlink channel to achieve both system capacity and coverage performance.

 It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

 In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. Alternatively, the coupling or direct coupling or communication connection between the various components shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

 The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (p "ocesso") to perform all or part of the steps of the methods described in various embodiments of the present application. The storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes.

 The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

Rights request 1. A method for determining the downlink channel aggregation level, which is characterized by including: The base station receives the channel quality related information of the downlink channel reported by the user equipment; The base station determines the signal to interference and noise ratio SINR of the downlink channel based on the channel quality related information; The base station determines the aggregation level of the downlink channel based on the determined SINR of the downlink channel and the set demodulation threshold. 2. The method according to claim 1, characterized in that the channel quality related information includes: channel quality information CQI; or, The channel quality related information includes: CQI, and at least one of rank indicator RI and precoding matrix indicator PMI. 3. The method according to claim 1 or 2, characterized in that, before the base station determines the demodulation threshold based on the SINR of the downlink channel, it further includes: The base station determines the format of the downlink control information DCI according to the multiple-input multiple-output MIMO mode adopted by the base station; The base station determines the demodulation threshold according to the determined DCI format. 4. The method according to any one of claims 1 to 3, characterized in that the set demodulation threshold includes: at least one demodulation threshold corresponding to the aggregation level of the downlink channel; The base station determines the aggregation level of the downlink channel based on the SINR of the downlink channel and the set demodulation threshold, including: The base station compares the SINR of the downlink channel with a demodulation threshold corresponding to the aggregation level of at least one downlink channel; If the SINR of the downlink channel is greater than or equal to the demodulation threshold, the base station determines the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel; if the downlink If the SINR of the channel is less than the demodulation threshold, the base station determines a higher aggregation level of the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel. 5. The method according to any one of claims 1 to 4, characterized in that the base station determines the signal to interference and noise ratio SINR of the downlink channel based on the channel quality related information, including: The base station calculates channel quality information of the downlink channel based on the channel quality related information. CQI value; The base station calculates the SINR of the downlink reference signal based on the CQI value; The base station calculates the SINFL of the downlink channel based on the SINR of the downlink reference signal. 6. The method according to any one of claims 1 to 5, characterized in that, after the base station determines the aggregation level of the downlink channel according to the SINR of the downlink channel and the set demodulation threshold, it further includes: : The base station determines whether the block error rate BLER of the downlink channel exceeds a set threshold; if the BLER of the downlink channel is greater than or equal to the set threshold, the base station increases the determined aggregation of the downlink channel Level; If the BLER of the downlink channel is less than the set threshold, the base station reduces the determined aggregation level of the downlink channel. 7. The method according to any one of claims 1 to 6, further comprising: the base station determining whether the BLER of the downlink channel is greater than or equal to the set threshold; if the determined downlink If the code rate corresponding to the aggregation level of the channel is less than or equal to the set code rate, and the BLER of the downlink channel is greater than or equal to the set threshold, then the base station determines to increase the transmission power of the downlink channel; wherein, The higher the aggregation level of the downlink channel, the lower the code rate, and the lower the aggregation level of the downlink channel, the higher the code rate. 8. The method according to claim 7, characterized in that, after the base station determines to increase the transmission power of the downlink channel, it further includes: If the BLER of the downlink channel is less than the set threshold, the base station determines to reduce the transmission power of the downlink channel. 9. A base station, characterized by including: A receiver, configured to receive the channel quality-related information of the downlink channel reported by the user equipment; a processor, configured to determine the signal-to-interference-noise ratio SINR of the downlink channel according to the channel quality-related information; according to the SINR of the downlink channel and The set demodulation threshold determines the aggregation level of the downlink channel. 10. The base station according to claim 9, characterized in that, the channel quality related information includes: channel quality information CQI; or, The channel quality related information includes: CQI, and at least one of rank indicator RI and precoding matrix indicator PMI. 11. The base station according to claim 9 or 10, characterized in that the processor is also used to: Determine the format of downlink control information DCI according to the multiple-input multiple-output MIMO mode adopted by the base station; determine the demodulation threshold according to the determined format of DCI. 12. The base station according to any one of claims 9-11, characterized in that the set demodulation threshold includes: at least one demodulation threshold corresponding to the aggregation level of the downlink channel; The processor is specifically configured to: compare the SINR of the downlink channel with a demodulation threshold corresponding to at least one aggregation level of the downlink channel; if the SINR of the downlink channel is greater than or equal to the demodulation threshold, then The base station determines the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel; if the SINR of the downlink channel is less than the demodulation threshold, the base station determines the aggregation level of the downlink channel. A carrier aggregation level higher than the aggregation level of the first downlink channel corresponding to the demodulation threshold is determined as the aggregation level of the downlink channel. 13. The base station according to any one of claims 9-12, characterized in that the processor is specifically configured to: calculate the channel quality information CQI value of the downlink channel according to the channel quality related information; The CQI value calculates the SINR of the downlink reference signal; calculates the SINFL of the downlink channel based on the SINR of the downlink reference signal. 14. The base station according to any one of claims 9-13, characterized in that the processor is further configured to: determine whether the block error rate BLER of the downlink channel exceeds a set threshold; if the downlink channel If the BLER of the downlink channel is greater than or equal to the set threshold, then the determined aggregation level of the downlink channel is increased; if the BLER of the downlink channel is less than the set threshold, then the determined aggregation level of the downlink channel is reduced. . 15. The base station according to any one of claims 9-14, wherein the processor is further configured to: determine whether the BLER of the downlink channel is greater than or equal to the set threshold; if the determined If the code rate corresponding to the aggregation level of the downlink channel is less than or equal to the set code rate, and the BLER of the downlink channel is greater than or equal to the set threshold, then it is determined to increase the transmission power of the downlink channel; wherein, the downlink channel The higher the aggregation level of the channel, the lower the code rate, and the lower the aggregation level of the downlink channel, the higher the code rate. 16. The base station according to claim 15, wherein the processor is further configured to: after determining to increase the transmission power of the downlink channel, if the BLER of the downlink channel is less than the set threshold, then Determine to reduce the transmission power of the downlink channel. 17. A base station, characterized by including: The receiving module is used to receive the channel quality related information of the downlink channel reported by the user equipment; A determining module, configured to determine the signal-to-interference-to-noise ratio SINR of the downlink channel based on the channel quality related information; and determine the aggregation level of the downlink channel based on the SINR of the downlink channel and the set demodulation threshold. 18. The base station according to claim 17, characterized in that the channel quality related information includes: channel quality information CQI; or, The channel quality related information includes: CQI, and at least one of rank indicator RI and precoding matrix indicator PMI. 19. The base station according to claim 17 or 18, wherein the determination module is further configured to: determine the format of the downlink control information DCI according to the multiple-input multiple-output MIMO mode adopted by the base station; The DCI format determines the demodulation threshold. 20. The base station according to any one of claims 17 to 19, characterized in that the set demodulation threshold includes: a demodulation threshold corresponding to at least one aggregation level of the downlink channel; The determination module is specifically configured to: compare the SINR of the downlink channel with the demodulation threshold corresponding to the aggregation level of at least one downlink channel; if the SINR of the downlink channel is greater than or equal to the demodulation threshold, then The base station determines the aggregation level of the first downlink channel corresponding to the demodulation threshold as the aggregation level of the downlink channel; if the SINR of the downlink channel is less than the demodulation threshold, the base station determines the aggregation level of the downlink channel. A higher-level aggregation level of the aggregation level of the first downlink channel corresponding to the demodulation threshold is determined as the aggregation level of the downlink channel. 21. The base station according to any one of claims 17 to 20, characterized in that the determination module is specifically configured to: calculate the channel quality information of the downlink channel according to the channel quality related information. CQI value; Calculate the SINR of the downlink reference signal based on the CQI value; Calculate the SINFL of the downlink channel based on the SINR of the downlink reference signal 22. The base station according to any one of claims 17 to 21, characterized in that the determination module is also used to: determine whether the block error rate BLER of the downlink channel exceeds a set threshold; if the downlink channel If the BLER of the downlink channel is greater than or equal to the set threshold, then the determined aggregation level of the downlink channel is increased; if the BLER of the downlink channel is less than the set threshold, then the determined aggregation level of the downlink channel is reduced. . 23. The base station according to any one of claims 17 to 22, characterized in that the determination module is also used to: determine whether the BLER of the downlink channel is greater than or equal to the set threshold; if the determined The code rate corresponding to the aggregation level of the downlink channel is less than or equal to the set code rate, and the downlink channel If the BLER of the downlink channel is greater than or equal to the set threshold, it is determined to increase the transmission power of the downlink channel; wherein, the higher the aggregation level of the downlink channel, the lower the corresponding code rate, and the higher the aggregation level of the downlink channel. Low corresponds to a higher code rate. 24. The base station according to claim 23, wherein the determining module is further configured to: after determining to increase the transmission power of the downlink channel, if the BLER of the downlink channel is less than the set threshold, then Determine to reduce the transmission power of the downlink channel. 25. A system for determining downlink channel aggregation level, characterized by: the base station according to any one of claims 9-16, and user equipment reporting channel quality related information of the downlink channel to the base station.