CN102595596A - CSI transmission method and apparatuses - Google Patents

Abstract

Embodiments of the present invention provide a CSI transmission method and device, which relate to the field of communication technology and are invented for effectively utilizing frequency domain resources. The CSI transmission method includes: the base station sends channel state information CSI transmission configuration information to the user equipment, wherein the transmission configuration information includes transmission mode information and reporting time information, and the transmission mode information is used to instruct the user equipment to pass The physical layer uplink shared channel PUSCH reports CSI, and the reporting time information is used to indicate the time when the user equipment reports the CSI; the base station sends CSI scheduling information to the user equipment through the uplink grant information UL Grant; the base station receives the The CSI reported by the user equipment according to the transmission configuration information and scheduling information. The invention can be used in wireless communication systems.

Description

A CSI transmission method and device

technical field

The present invention relates to the field of communication technologies, and in particular to a CSI transmission method and device.

Background technique

In the Long Term Evolution (LTE) system, in order to support downlink adaptive scheduling, the UE needs to report the channel state information (CSI) of the downlink carrier to the base station. Among them, CSI includes channel quality indicator CQI (Channel Quality Indicator), precoding matrix indicator PMI (Precoding Matrix Indicator) and rank indicator (RI, Rank Indicator), etc. CSI reporting includes Periodic Reporting (Periodic Reporting) and Aperiodic Reporting (Aperiodic Reporting). Among them, when no uplink data is sent, periodic CSI is sent through the physical layer uplink control channel PUCCH (Physical Uplink Control channel), while there is uplink When data is sent, it is sent through the physical uplink shared channel PUSCH (Physical Uplink Shared Channel); aperiodic CSI is sent through PUSCH.

In order to increase the peak rate and meet the data rate requirements of the future communication system, the enhanced Long Term Evolution LTE-A (Long Term Evolution Advanced) system introduces carrier aggregation CA (Carrier Aggregation) technology, which can receive or transmit multiple unit carriers CC at the same time (Component Carrier). For example, LTE-A Release 10 (Rel-10, Release 10) already supports a maximum of 5 downlink carrier aggregations, which may be further expanded in the future. In order to support adaptive scheduling of each downlink component carrier, it is necessary to feed back the CSI of each downlink component carrier. In addition, in most scenarios of time division multiplexing TDD (Time Division Dual) systems, downlink subframes are more than uplink subframes. Therefore, in carrier aggregation scenarios, especially in TDD carrier aggregation scenarios, the CSI that needs to be fed back each time The number of information bits is greatly increased compared with LTE, and a PUCCH in the LTE system can only carry a maximum of 11 bits of periodic CSI, which is difficult to meet the demand. Therefore, it is necessary to configure the periodic CSI on the PUSCH for transmission to ensure transmission accuracy. In this way, how to schedule the transmission of the periodic CSI on the PUSCH is a problem to be solved. However, the method for configuring through high-layer signaling proposed in the prior art is a semi-static configuration, which cannot implement flexible configuration of periodic CSI scheduling information.

Contents of the invention

The main purpose of the embodiments of the present invention is to provide a CSI transmission method and device, which can flexibly configure CSI scheduling information.

On the one hand, an embodiment of the present invention provides a CSI transmission method, including:

The base station sends transmission configuration information of channel state information CSI to the user equipment, wherein the transmission configuration information includes transmission mode information and reporting time information, and the transmission mode information is used to instruct the user equipment to report CSI through the physical layer uplink shared channel PUSCH, The reporting time information is used to indicate the time when the user equipment reports the CSI;

The base station sends CSI scheduling information to the user equipment through uplink grant information UL Grant (Uplink Grant);

The base station receives the CSI reported by the user equipment according to the transmission configuration information and the scheduling information.

On the other hand, an embodiment of the present invention provides a CSI transmission method, including:

The user equipment receives CSI transmission configuration information sent by the base station, wherein the transmission configuration information includes transmission mode information and reporting time information, and the transmission mode information is used to instruct the user equipment to report CSI through the physical layer uplink shared channel PUSCH, the The reporting time information is used to indicate the time when the user equipment reports the CSI;

The user equipment receives the CSI scheduling information sent by the base station to the user equipment through the UL Grant;

The user equipment reports the CSI to the base station through the PUSCH according to the transmission configuration information and the scheduling information.

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

A sending unit, configured to send transmission configuration information of channel state information CSI to the user equipment, wherein the transmission configuration information includes transmission mode information and reporting time information, and the transmission mode information is used to instruct the user equipment to share the channel through the physical layer uplink PUSCH reports CSI, and the reporting time information is used to indicate the time when the user equipment reports the CSI; sending CSI scheduling information to the user equipment through the uplink authorization information UL Grant;

A first receiving unit, configured to receive the CSI reported by the user equipment according to the transmission configuration information and the scheduling information sent by the sending unit.

In another aspect, an embodiment of the present invention provides a user equipment, including:

The second receiving unit is configured to receive CSI transmission configuration information sent by the base station, wherein the transmission configuration information includes transmission mode information and reporting time information, and the transmission mode information is used to instruct the user equipment to use the physical layer uplink shared channel PUSCH Reporting CSI, the reporting time information is used to indicate the time when the user equipment reports the CSI; receiving the CSI scheduling information sent by the base station to the user equipment through the UL Grant;

A reporting unit, configured to report the CSI to the base station through the PUSCH according to the transmission configuration information and the scheduling information received by the second receiving unit.

After adopting the above technical solution, the CSI transmission method, the base station and the user equipment provided by the embodiment of the present invention, the base station notifies the user equipment in advance to use the PUSCH to report the CSI, and then sends the CSI scheduling information through the UL Grant, so that the user equipment is specified according to the UL Grant Therefore, the base station can flexibly configure the CSI scheduling information through the UL Grant.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flowchart of a CSI transmission method provided by an embodiment of the present invention;

FIG. 2 is a flowchart of a CSI transmission method provided by an embodiment of the present invention;

FIG. 3 is another flowchart of a CSI transmission method provided by an embodiment of the present invention;

Fig. 4 is an example diagram of the reporting time determined in the method shown in Fig. 3 .

FIG. 5 is another example diagram of the reporting time determined in the method shown in FIG. 3 .

FIG. 6 is a flowchart of a CSI transmission method provided by an embodiment of the present invention;

FIG. 7 is a structural block diagram of a base station provided by an embodiment of the present invention;

FIG. 8 is another structural block diagram of a base station provided by an embodiment of the present invention;

FIG. 9 is another structural block diagram of a base station provided by an embodiment of the present invention;

Fig. 10 is a structural block diagram of user equipment provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that, in the embodiment of the present invention, the CSI may feed back at least one of the following information: RI, wideband PMI, wideband CQI and subband CQI. In addition, the component carrier in the present invention can also be replaced by the concept of a cell (Cell). In this way, the primary component carrier is also called a primary cell (PCell, Primary Cell), and the secondary component carrier is also called a secondary cell (SCell, Secondary Cell).

As shown in Figure 1, a CSI transmission method provided by an embodiment of the present invention is based on a base station, including:

Step 101, the base station sends CSI transmission configuration information to the user equipment.

Wherein, the transmission configuration information includes transmission mode information and reporting time information, the transmission mode information is used to instruct the user equipment to report CSI through the physical layer uplink shared channel PUSCH, and the reporting time information is used to indicate the time when the user equipment reports the CSI .

Step 102, the base station sends CSI scheduling information to the user equipment through uplink grant information UL Grant.

Wherein, the scheduling information of the CSI is used to indicate the frequency domain resource for the user equipment to report the CSI, and some related scheduling parameters that need to be followed when reporting the CSI, such as a modulation and coding scheme MCS (Modulation and Coding Scheme).

Step 103, the base station receives the CSI reported by the user equipment according to the transmission configuration information and the scheduling information.

In the CSI transmission method provided by the embodiment of the present invention, the base station notifies the user equipment in advance to use the PUSCH to report the CSI, and then sends the CSI scheduling information through the UL Grant, so that the user equipment reports the CSI according to the scheduling information specified by the UL Grant. Therefore, the base station The flexible configuration of CSI scheduling information can be performed through UL Grant. Moreover, the base station can select appropriate frequency domain resources and MCS for the user equipment according to channel quality changes, and can make more effective use of frequency domain resources.

Corresponding to the method shown in FIG. 1, as shown in FIG. 2, a CSI transmission method provided by an embodiment of the present invention, based on the user equipment served by the above-mentioned base station, includes:

Step 201, the user equipment receives CSI transmission configuration information sent by the base station.

Wherein, the transmission configuration information includes transmission mode information and reporting time information, the transmission mode information is used to instruct the user equipment to report CSI through the physical layer uplink shared channel PUSCH, and the reporting time information is used to instruct the user equipment to report CSI moment;

Step 202, the user equipment receives the CSI scheduling information sent by the base station to the user equipment through the UL Grant.

Step 203, the user equipment reports the CSI to the base station through the PUSCH according to the transmission configuration information and the scheduling information.

Specifically, the user equipment reports the CSI to the base station through the PUSCH on the frequency domain resources indicated by the scheduling information at the reporting time indicated by the transmission configuration information.

In the CSI transmission method provided by the embodiment of the present invention, the user equipment can use the PUSCH under the configuration and scheduling of the base station, and report the CSI according to the frequency domain resources specified by the UL Grant. Therefore, the base station can perform CSI scheduling information through the UL Grant flexible configuration. The user equipment can send CSI on the preferred channel configured for it by the base station, which can make frequency domain resource utilization more effective.

The CSI transmission method of the present invention is described below through specific embodiments, and the following specific embodiments are described by taking periodic CSI as an example. It should be understood that the present invention is not limited thereto.

As shown in FIG. 3 , it is a specific embodiment of the CSI transmission method of the present invention. This embodiment is applied to a scenario where multiple downlink component carriers are aggregated, and of course may also be applied to other scenarios, and the CSI is specifically the CSI of the downlink component carrier. In order to make more effective use of frequency domain resources, in this embodiment, the downlink component carriers in a CA system are grouped, and the downlink component carriers are divided into at least one group. The specific grouping method can be configured by the base station through high-level signaling. Can also be pre-defined. For example, the downlink component carriers can be grouped according to the frequency band (band). For example, when the downlink component carriers of band 3 and band 7 are aggregated, all the downlink component carriers of band 3 are grouped into one group, and all the downlink component carriers of band 7 The component carrier is a group; it can also be grouped according to the carrier type of the downlink component carrier, for example: the primary component carrier PCC (Primary Component Carrier,) and the secondary component carrier SCC (Secondary Component Carrier) are divided into different groups. It should be noted that, preferably, the fewer groups, the simpler the scheduling of the base station, that is, the simpler and more effective the reporting time planning and resource allocation.

As shown in Figure 3, this embodiment includes:

In step 301, the base station determines the reporting time information of the periodic CSI of the downlink component carrier.

Specifically, the reporting time information includes the CSI reporting period _NP of the downlink component carrier and a starting offset N _OFFSET within _{the NP} , and the user equipment will, according to the received _NP and N _OFFSET , The periodic CSI reporting time is calculated according to the formula (1), that is, the time satisfying the formula (1) is the periodic CSI reporting time.

Wherein, n _f is a system frame number (System frame number), and n _s is a time slot number (Slot number) in a radio frame.

Preferably, the determined reporting time information enables the periodic CSI reporting time of each downlink component carrier to maximize collision, that is, to report simultaneously as much as possible, so as to make more effective use of frequency domain resources.

Specifically, in the CSI reporting time information of the downlink component carriers of the same group determined by the base station, the _NP value and the N _OFFSET value are the same, and the reporting time information of the CSI of the downlink component carriers of different groups determined by the base station In , the _NP values are different, but the N _OFFSET values are the same, and the small _NP value is a factor of the large _NP value, that is, the small _NP value must be divisible by the large _NP value.

For example, as shown in Figure 4, there are two groups of downlink component carriers in group 1 and group 2, each small square represents 1 millisecond (ms), the N _OFFSET of group 1 and group 2 is the same, and the period CSI of group 1 is N _P is 5ms, the _NP of the periodic CSI of group 2 is 10ms, the _NP of the periodic CSI of group 1 is the factor of the _NP of the periodic CSI of group 2, like this, will make group 1 and group 2 The reporting time maximizes the phase collision.

It should be noted that the standard can only define the relationship between N and _P values, and the N _OFFSET value is realized by the base station through an algorithm. The principle of the algorithm is to maximize the phase collision of the reporting time of the periodic CSI of each downlink component carrier, that is, as much as possible Report at the same time.

During the effective reporting period of the periodic CSI, when there is a semi-persistent scheduling SPS (Semi-Persistent Scheduling) data service, in this step, the base station determines the reporting time information of the periodic CSI of the downlink component carrier as follows:

Determine the reporting time information of the CSI of the downlink component carrier according to the transmission period of the SPS data service and the reporting period of the CSI of each group of downlink component carriers, wherein the reporting time information includes the N of the CSI of the downlink component carrier _P and a N _OFFSET within _{the NP} .

Preferably, the determined reporting time information enables the reporting time of the periodic CSI of each downlink component carrier and the reporting time of the service data of the SPS data service to maximize the collision, that is, to report at the same time as possible, so as to further optimize the frequency domain resources. effective use.

Specifically, when the transmission period of the SPS data service is the same as the _NP of the CSI of at least one group of downlink component carriers, in the reporting time information of the CSI of the at least one group of downlink component carriers determined by the base station, the _NP value is the same as the NP value of the at least one group of downlink component carriers. The transmission cycle value of the SPS data service is the same, and the N _OFFSET value is the same as the initial offset value of the SPS data service in a transmission cycle;

When the transmission period of the SPS data service is greater than the _NP of the CSI of at least one group of downlink component carriers, in the reporting time information of the CSI of the at least one group of downlink component carriers determined by the base station, the N _OFFSET value is related to the SPS data service The starting offset value in a transmission period is the same, and the N _P value is a factor of the transmission period value of the SPS data service;

When the transmission period of the SPS data service is less than the _NP of the CSI of at least one group of downlink component carriers, in the reporting time information of the CSI of the at least one group of downlink component carriers determined by the base station, the N _OFFSET value is related to the SPS data service The starting offset values in one transmission period are the same, and the N _P value is a multiple of the transmission period value of the SPS data service.

For example, as shown in Figure 5, there are two groups of downlink component carriers in group 1 and group 2, the _NP of the periodic CSI of group 1 is 5ms, the _NP of the periodic CSI of group 2 is 10ms, and the transmission period of the SPS data service is 20 ms, the _NP of the periodic CSI of group 1 is the factor of the _NP of the periodic CSI of group 2, and the _NP of the periodic CSI of group 1 and group 2 is the factor of the transmission period of the SPS data service, therefore, the transmission period of the SPS data service time, the reporting time of the periodic CSI of group 1 and group 2 will maximize the collision.

In addition, it should be noted that when the service data transmission period of the SPS data service is fine-tuned, for example, for some uplink and downlink subframe configurations of the TDD system, the Subframe Offset (subframe offset) can be configured as "0" or A specific value, when configured as other values, the period can be fine-tuned, for example, the transmission time is: 0, 9, 20, 29, 30..., the period CSI of each group of downlink component carriers determined by the base station The reporting time needs to be fine-tuned according to the service data transmission cycle of the SPS data service.

It should be noted that the standard can only define the relationship between the _NP value, and the N _OFFSET value is realized by the base station through an algorithm. The principle of the algorithm is to make the reporting time of the periodic CSI of each downlink component carrier and the transmission time of the service data of the SPS data service Maximize phase collisions.

The manner in which the base station determines the reporting time information of the periodic CSI of the downlink component carrier can make resource allocation more effective and spectrum utilization higher. For example, in the case shown in Figure 5, it is assumed that the independent reporting of the periodic CSI of group 1 and group 2 requires 0.5 resource blocks (RB), and since frequency domain resources are allocated in units of RB, therefore , when an integer number of RBs is not required for information transmission, an integer number of RBs will also be allocated. That is to say, if the periodic CSI reports of group 1 and group 2 each require 1 RB, and the SPS data service data report requires 2 RB, that is, a total of 4 RB; and in the embodiment of the present invention, since the report/transmission time corresponding to the group 1, group 2 and SPS data service has the corresponding relationship of maximum collision, therefore, the periodic CSI and SPS data service of group 1 and group 2 will appear At the moment of reporting/transmitting together, only 3RB are needed at this time, so the spectrum utilization rate is improved. Moreover, the manner in which the base station determines the reporting time information of the periodic CSI of the downlink component carrier can also reduce the reporting/transmission time, which is beneficial to power saving of the user equipment. In addition, when various semi-persistent scheduling packets corresponding to the service data of periodic CSI and/or SPS data services need to be reported/transmitted, if the reporting/transmission time is not planned, sometimes they collide and are transmitted together, and sometimes they are separated and transmitted separately, the scheduling will becomes very complicated, especially for resource allocation, the above method can effectively simplify resource allocation.

It should be pointed out that when there are multiple semi-persistent scheduling in other scenarios, the above method of determining the reporting time information of the periodic CSI of the downlink component carrier by the base station may also be adopted. For example, in a heterogeneous network Hetnet (Heterogeneous Network) scenario.

In step 302, the base station sends periodic CSI transmission configuration information to the user equipment through high-layer signaling.

Wherein, the transmission configuration information includes transmission mode information and reporting time information, the transmission mode information is used to instruct the user equipment to use the physical layer uplink shared channel PUSCH to report periodic CSI, and the reporting time information is the reporting time determined in step 301 The information is used to indicate the time when the user equipment reports the periodic CSI, that is, indicates when the user equipment needs to report the periodic CSI.

Preferably, in this step, the base station sends periodic CSI transmission configuration information to the user equipment through high-level radio resource control RRC (RadioResource Control) signaling. Of course, the base station can also send periodic CSI transmission configuration information through other high-level signaling. The invention is not limited to this.

When the base station sends transmission mode information through high-level signaling, a bit field can be added to the high-level signaling, and the bit field can be used to instruct the user equipment to report periodic CSI through the PUSCH; or, specific information can be carried in the high-level signaling. A transmission mode identifier, the specific transmission mode identifier is used to instruct the user equipment to report periodic CSI through the PUSCH.

Specifically, in this step, the reporting time information includes the reporting period _NP and a starting offset N _OFFSET parameter within a reporting period, and the user equipment can determine the reporting time of the periodic CSI according to the above parameters.

It should be noted that the CA system includes multiple downlink component carriers. In this embodiment, optionally, the periodic CSI transmission configuration information of different downlink component carriers is independently configured, that is, the periodic CSI of each downlink component carrier Both the transmission mode information and the reporting time information need to be configured independently. In addition, a group of periodic CSI transmission configuration information of downlink component carriers may also be configured together.

Step 303, the base station configures a UL Grant for sending CSI scheduling information to the user equipment.

With UL Grant, the scheduling information can be flexibly configured, for example, the most suitable frequency domain resource can be selected to report CSI according to the change of the wireless channel in a timely manner.

In the uplink, the user equipment may send data, CSI, or both data and CSI on the PUSCH. In this step, the scheduling information of the PUSCH is indicated by the UL Grant, and how to distinguish the case of no data, that is, the UL Grant does not contain the scheduling information of the data, the UL Grant needs to be further designed, as follows. In addition, it should be noted that the data described in the present invention refers to the transport packet (Transport Block) carried on the uplink shared channel (UL-SCH, Uplink Shared Channel), which can be dynamically scheduled (referred to as dynamic data), or semi-persistent scheduling (referred to as semi-persistent scheduling data in the present invention). Among them, the UL-SCH is a kind of transport channel (TransportChannel), that is, an information transmission service provided from the physical layer to MAC (Medium Access Control, multimedia access control).

In this embodiment, the semi-persistent scheduling mechanism is adopted, and the periodic CSI scheduling information configured by the base station to the user equipment is semi-persistent scheduling information, which means the scheduling information indicated by a UL Grant (such as: frequency domain resource allocation, MCS, etc.), in The periodical CSI reporting time lasts for a period of time until a new UL Grant appears, and then the scheduling information is changed, and then the scheduling information is valid for a period of time until a new UL Grant appears again. In this step, the base station can configure appropriate frequency domain resources and MCS for the user equipment according to channel quality changes, and therefore, can make more effective use of frequency domain resources.

Wherein, the UL Grant may include semi-persistent scheduling information of periodic CSI, or semi-persistent scheduling information of semi-persistent scheduling SPS data, or include both semi-persistent scheduling information of periodic CSI and semi-persistent scheduling information of semi-persistent scheduling SPS data. The semi-persistent scheduling information of the periodic CSI is used to indicate the frequency domain resources for the user equipment to report the periodic CSI, and some scheduling parameters such as the MCS that need to be followed when reporting the periodic CSI.

For example, as we all know, the base station performs resource allocation and other scheduling on the semi-persistent scheduling SPS data service through the UL Grant, but in the embodiment of the present invention, the scheduling information of the CSI is sent through the UL Grant, so the UL Grant can indicate at the same time The scheduling information of the CSI and the scheduling information of the SPS data, of course, may also only indicate the scheduling information of the CSI.

Specifically, this step can configure three ways of UL Grant, as follows:

Method 1: Use SPS C-RNTI (SPS Cell Radio Network TemporaryIdentifiers, SPS wireless network temporary identifier) scrambled downlink control information DCI (Downlink Control Information) to configure periodic CSI semi-persistent scheduling information.

When SPS C-RNTI scrambled DCI is used to configure periodic CSI semi-persistent scheduling information, even if there is no SPS data service configuration, the base station needs to configure SPS C-RNTI scrambled DCI for periodic CSI. In addition, because the scheduling of the SPS data service is also configured through the DCI scrambled by the SPSC-RNTI, when the RRC signaling enables the SPS data service, it is necessary to distinguish the case of no SPS data scheduling. If one bit is directly added to the DCI to indicate whether there is data, the overhead of the DCI will be increased, and the number of blind detection times of the DCI will be increased. Therefore, optionally, DCI in the following format is used for indication in this embodiment:

A configuration format is that the new data of the SPS C-RNTI scrambled DCI indicates that the bit value of the NDI field is "0", and the bit value of the MCS and redundancy version (RV, Redundancy version) field is "11101" ( That is, I _MCS =29) or "11110" (ie I _MCS =30) or "11111" (ie I _MCS =31). The NDI field of DCI scrambled by SPS C-RNTI is set to "0" to indicate new/initial transmission, I _MCS = 29/30/31 to indicate different RV versions for retransmission, and when the NDI value is "0", it indicates initial transmission is contradictory, so these states are redundant in existing systems. The redundant state is used for indication, and no additional bit information overhead is required. In order to reduce the false alarm probability of CRC (Cyclic Redundancy Check), the 5-bit MCS and RV fields can be set as unique fixed values, for example, only take the value "11101" (ie I _MCS =29).

In order to further reduce the CRC false alarm probability, a virtual cyclic redundancy check (CRC, Cyclic Redundancy Check) bit can be set, and the bit value of each virtual CRC bit is set to "1". Here, preferably, the virtual CRC of the bit may include a 2-bit transmission power control (TPC, Transmit Power Control) command domain and a 3-bit demodulation reference signal (DMRS, Demodulation Reference Signal) cyclic shift (CS, CyclicShift) At least one of domains. Depending on your needs, you can also select only a few bits in each field.

Considering that the MCS and RV fields have been fixedly set and lose the function of indicating the current MCS, the modulation order can be predefined, for example: pre-defined as QPSK modulation (modulation order is 2); the current modulation order can also be configured through high-level signaling MCS; you can also choose a new field to indicate MCS, that is, reinterpret the original field, for example: you can select TPC command field, DMRS cyclic shift field, etc. to indicate MCS. It should be noted that, when selected as the indicating MCS domain, it cannot be used as a virtual CRC check digit. For example, when 2 bits of the 2-bit TPC field and 2 bits of the DMRS cyclic shift field are selected as the indication field of the MCS, only 1 bit remains of the original 5-bit virtual CRC check bit.

Another configuration format is that the bit value of the NDI field of the SPS C-RNTI scrambled DCI is "0", and the bit value of each virtual CRC bit is "1". Preferably, the virtual CRC may include a TPC command field, a DMRS cyclic shift field, and at least one field among MCS and RV fields. According to needs, only a few bits in each field can be selected, for example, only the most significant bit (MSB, Most Significant Bit) in the MCS and RV fields is selected as the virtual CRC bit. When in the MCS and RV fields, only the most significant bit of the MCS and RV fields of 1 bit is selected as the virtual CRC bit, when the user equipment interprets the _IMCS through the MCS and RV fields, it only refers to the 4 lowest Effective bits (LSB, Least Significant Bit), for example, the current MCS and RV fields are "11001", 1 MSB bit is "1", and 4 LSBs are "1001", so the user equipment interprets the current I _MCS = 9. When the most significant bit of N (N is an integer greater than or equal to 1) bits is selected as the virtual CRC bit in the MCS and RV domains, the remaining bits can be interpreted first, which needs to be predefined by the standard, for example, the remaining 1 bit , "0" means QPSK, "1" means 16QAM, when the user equipment interprets the I _MCS through the MCS and RV fields, it only judges the current MCS according to the remaining bits. Adopting this method does not require additional DCI bit overhead.

Specifically, the DCI scrambled by the SPS C-RNTI can be downlink control information format 0 (DCI format 0), DCI format 4, or other formats. When the UL Grant scrambled by SPS C-RNTI is DCI format 4, and there are two transport blocks (TB, TransportBlock), then the NDI domain configuration and MCS and RV domain configurations corresponding to the two TB blocks adopt the above principles, for example, The bit value of the NDI field of the transport blocks TB1 and TB2 of DCI format 4 is "0". In addition, in DCI format 4, the 3-bit DMRS cyclic shift field is called the DMRS cyclic shift and OCC indication field.

Method 2: Use the UL Grant scrambled by the C-RNTI to configure the semi-persistent scheduling information of the periodic CSI.

Because the scheduling of data services is also configured through the UL Grant scrambled by C-RNTI, it is necessary to distinguish the case of no data transmission, that is, the UL Grant scrambled by C-RNTI is only used to configure the semi-persistent scheduling information of periodic CSI, so The above UL Grant only indicates the semi-persistent scheduling information of periodic CSI.

In this way, optional, the UL Grant in the following format can be used to distinguish:

1. The UL Grant scrambled by C-RNTI is DCI format 0.

A configuration format is that the bit values of the MCS and RV fields are "00000" (i.e. I _MCS = 0), and the number of physical resource blocks (PRB, Physical Resource Block) is an integer greater than 1;

Another configuration format is that the bit value of the 5-bit MCS and RV fields is "11100" (that is, I _MCS =28), and the number of PRBs is set to 1;

Another configuration format is that the bit values of the 5-bit MCS and RV fields are "11110" (ie I _MCS =30) or "11111" (ie I _MCS =31), and the CQI request field is set to 1. Here, the preferred bit value of the MCS and RV fields is "11110" (ie, I _MCS =30), because the RV version is 2 (I _MCS =30), and its usage rate is lower than that of RV version 3 (I _MCS =31).

2. The UL Grant of C-RNTI scrambling is DCI format 4.

A configuration format is that the bit values of the 5-bit MCS and RV fields of TB1 and TB2 are "00000" (that is, I _MCS = 0), and the number of PRBs is set to an integer greater than 1;

Another configuration format is that the bit values of the 5-bit MCS and RV fields of TB1 and TB2 are "11100" (that is, I _MCS =28), and the number of PRBs is set to 1;

Another configuration format is that the bit values of the 5-bit MCS and RV fields of TB1 and TB2 are "11110" (ie I _MCS =30) or "11111" (ie I _MCS =31), and the CQI request field is set to 1 . Here, the preferred bit value of the MCS and RV fields is "11110" (that is, I _MCS =30).

It should be noted that, in addition to the existing Format 0 and 4, when a new format is introduced in the future, this principle can also be used to indicate that the UL Grant is only used to indicate the scheduling information of the CSI.

Considering that the MCS and RV fields have been fixedly set and lose the function of indicating the current MCS, the modulation order can be predefined, for example: pre-defined as QPSK modulation (modulation order is 2); the current modulation order can also be configured through high-level signaling MCS; you can also select a new field to indicate MCS, that is, re-interpret the original field.

Mode 3: Use the UL Grant scrambled by the new C-RNTI to configure periodic CSI semi-persistent scheduling information.

The upper layer adds an information element (IE, Information element) to configure a new C-RNTI to be used by the periodic CSI.

When the semi-persistent scheduling mechanism is adopted, a deactivated UL Grant can also be introduced, that is, when a deactivated UL Grant is received, the user equipment can stop reporting periodic CSI. For the deactivated UL Grant, the bits of the MCS and RV fields can all be set to "1" or "0", and/or, the bits of the RB allocation and frequency hopping resource indication field (Resource Block AssignmentAnd Hopping Resource Allocation) It can be all set to "1" or "0", and/or, the bits in the TPC field and the DMRS cyclic shift field can all be set to "1" or "0".

Optionally, in this embodiment, the base station sends semi-persistent scheduling information that schedules periodic CSI corresponding to reporting times of different reporting periods to the user equipment through different UL Grants. As shown in Figure 4, there are two periods, and the reporting times of different periods correspond to different UL Grants.

In addition, it should be pointed out that in this step, the base station may also adopt a dynamic scheduling mechanism, that is, the base station configures a UL Grant for sending dynamic scheduling information of CSI to the user equipment. There are 3 configuration methods:

Method 1: Use the UL Grant scrambled by C-RNTI for dynamic scheduling, and each periodic CSI report is scheduled or triggered by a UL Grant. At this time, if the user equipment does not receive the corresponding UL Grant, periodic CSI is not reported. It should be pointed out that the C-RNTI scrambled UL Grant used for dynamic scheduling should be distinguished from the C-RNTI scrambled UL Grant used for data service scheduling. The specific distinguishing method can adopt the method of the second method in this step (use the UL Grant scrambled by the C-RNTI to configure the semi-persistent scheduling information of the periodic CSI).

Method 2: Use the SPS C-RNTI scrambled UL Grant (not for semi-persistent scheduling, just reuse the SPS C-RNTI, and change the attribute to dynamic scheduling), and each periodic CSI report is scheduled through a UL Grant Or trigger, at this time, if the user equipment does not receive the corresponding UL Grant at a certain reporting time, it will not report the periodic CSI. It should be pointed out that when the SPS data service is enabled, it is necessary to distinguish the situation that no SPS data service is sent, that is, the UL Grant scrambled by SPSC-RNTI is only used to configure the dynamic scheduling information of the periodic CSI. The specific distinguishing method can adopt the method of method 1 in this step 303 (the UL Grant scrambled with SPS C-RNTI is used to configure the semi-persistent scheduling information of the periodic CSI).

Method 3: Use the UL Grant scrambled by the new C-RNTI to configure the dynamic scheduling information of the periodic CSI.

Step 304, the base station sends the semi-persistent scheduling information of the periodic CSI to the user equipment through the configured UL Grant.

Before the user equipment sends the PUSCH to report the periodic CSI, it needs to know the scheduling information configured by the base station for the user equipment. In this embodiment, the base station sends the periodic CSI scheduling information to the user equipment through the UL Grant information.

When the base station configures different UL Grants for CSI with different reporting periods, in this step, the base station sends the scheduling information of the CSI with different reporting periods to the user equipment through the configured different UL Grants . At any reporting moment, if the user equipment needs to report at least two CSIs with different reporting periods, the base station only configures one kind of UL Grant scheduling information to take effect, and the UL Grant is the largest among the multiple different reporting periods The UL Grant corresponding to the reporting period.

Step 305, the base station receives the CSI reported by the user equipment according to the transmission configuration information and scheduling information.

In the periodic CSI transmission method provided in this embodiment, the base station notifies the user equipment in advance to use the PUSCH to report the periodic CSI, and then configures the frequency domain resources and MCS for the user equipment to report the periodic CSI through the UL Grant, and the user equipment follows the frequency domain resources specified by the UL Grant and MCS to report periodic CSI through PUSCH. Therefore, the base station can flexibly configure CSI scheduling information through UL Grant, and can select appropriate frequency domain resources and MCS for user equipment according to channel quality changes, so as to optimize frequency domain resources. more effective use. In addition, the base station also optimizes the reporting time of the periodic CSI, which further simplifies resource allocation and improves spectrum utilization.

Corresponding to the method shown in FIG. 3, as shown in FIG. 6, it is a specific embodiment of the CSI transmission method of the present invention. This specific embodiment is described by taking periodic CSI as an example. It can be understood that this The invention is not limited thereto. include:

In step 401, the user equipment receives periodic CSI transmission configuration information sent by the base station through high-layer signaling.

The user equipment may determine, according to the transmission configuration information, to report the periodic CSI through the PUSCH and the reporting time of reporting the periodic CSI. Wherein, the high layer signaling is preferably RRC signaling. Specifically, the reporting time information includes the CSI reporting period _NP of the downlink component carrier and a starting offset N _OFFSET within _{the NP} , and the user equipment will, according to the received _NP and N _OFFSET , The periodical CSI reporting time is calculated according to the foregoing formula (1).

Step 402, the user equipment receives the semi-persistent scheduling information of the periodic CSI sent by the base station to the user equipment through the UL Grant.

Wherein, the UL Grant may include semi-persistent scheduling information of periodic CSI, or semi-persistent scheduling information of semi-persistent scheduling SPS data, or include both semi-persistent scheduling information of periodic CSI and semi-persistent scheduling information of semi-persistent scheduling SPS data.

The user equipment may determine frequency domain resources and MCS for reporting periodic CSI according to the semi-persistent scheduling information.

Specifically, in this step, the configuration method of the UL Grant received by the user equipment is detailed in the previous embodiment, and will not be repeated here.

In addition, it should be pointed out that in this step, the base station can also adopt a dynamic scheduling mechanism, that is, the user equipment receives the UL Grant sent by the base station, and sends periodic CSI according to the dynamic scheduling information. There are three specific methods:

Method 1: Use the UL Grant scrambled by C-RNTI for dynamic scheduling, and each periodic CSI report is scheduled or triggered by a UL Grant. At this time, if the user equipment does not receive the corresponding UL Grant, periodic CSI is not reported. It should be pointed out that the C-RNTI scrambled UL Grant used for dynamic scheduling should be distinguished from the C-RNTI scrambled UL Grant used for data service scheduling. The specific distinguishing method can adopt the method of the second method in this step 402 (use the UL Grant scrambled by the C-RNTI to configure the semi-persistent scheduling information of the periodic CSI).

Method 2: Use the SPS C-RNTI scrambled UL Grant (not for semi-persistent scheduling, just reuse the SPS C-RNTI, and change the attribute to dynamic scheduling), and each periodic CSI report is scheduled through a UL Grant Or trigger, at this time, if the user equipment does not receive the corresponding UL Grant at a certain reporting time, it will not report the periodic CSI. It should be pointed out that when the SPS data service is enabled, it is necessary to distinguish the situation that no SPS data service is sent, that is, the UL Grant scrambled by SPSC-RNTI is only used to configure the dynamic scheduling information of the periodic CSI. The specific distinguishing method can adopt the method of method 1 in this step 402 (the UL Grant scrambled with SPS C-RNTI is used to configure the semi-persistent scheduling information of the periodic CSI).

Method 3: Use the UL Grant scrambled by the new C-RNTI to configure the dynamic scheduling information of the periodic CSI.

Step 403, the user equipment reports the periodic CSI through the PUSCH on the frequency domain resources indicated by the semi-persistent scheduling information at the reporting time indicated by the transmission configuration information.

In this embodiment, the scheduling information in the UL Grant includes resource allocation in the frequency domain, that is, allocation of RBs. When multiple semi-persistent scheduling needs to be sent, and the sending time is different, resource allocation will become complicated. In order to simplify resource allocation, the base station side optimizes the reporting time (described in step 301). For example, as shown in Figure 5, in this step, three different frequency-domain resource sizes will need to be allocated, so that when the periodic CSI of group 1 is sent alone, when the periodic CSI of group 1 and group 2 are sent together, group 1 Three types of requirements when sending with periodic CSI and SPS of group 2. For different periodic CSIs, different UL Grants need to be configured for resource allocation. In this case, in this step, the user equipment can handle it in the following two ways:

Method 1: At any reporting moment, if at least two CSIs with different reporting periods need to be reported, the CSI is reported only according to the scheduling information of one UL Grant, and the UL Grant is one of the at least two different reporting periods. The UL Grant corresponding to the largest reporting period; that is, at the reporting time of the periodic CSI of a larger period, resource allocation will only be performed according to the UL Grant corresponding to the larger period, and the frequency domain resources at a certain periodic reporting time indicated by the UL Grant Corresponding to all periodic CSI information data to be transmitted at the time when the report should be made. Specifically, as shown in FIG. 4 , there are two types of periods, and reporting times of different periods correspond to different UL Grants. When the periodic CSIs of group 1 and group 2 appear at the same time, the periodic CSIs of group 1 and group 2 are sent on the frequency domain resources indicated by the UL Grant corresponding to group 2 (large period) with high priority.

When there is an SPS data service, at any reporting moment, if at least one CSI with different reporting periods needs to be reported and the SPS data service is transmitted, the reporting of the CSI and the transmission of the SPS data service are only performed according to one UL Grant scheduling information, so The UL Grant is the UL Grant corresponding to the largest period among the reporting period of the CSI and the transmission period of the SPS data service. Specifically, as shown in Figure 5, there are three types of periods, and the reporting times of different periods correspond to different UL Grants. When the periodic CSI of group 1 and group 2 occurs at the same time, the periodic CSI of group 1 and group 2 is sent on the frequency domain resources indicated by the UL Grant corresponding to group 2 (large period) with high priority; when group 1 and group 2 When the periodic CSI and SPS data services appear at the same time, the periodic CSI and SPS data services of Group 1 and Group 2 are sent on the frequency domain resource indicated by the UL Grant corresponding to the SPS data service with high priority (large period).

Such transmission can effectively improve spectrum utilization. Assume that when the SPS data service, the periodic CSI of group 1 and the periodic CSI of group 2 allocate resources independently, 3 RBs, 1 RB and 1 RB are required respectively, but the CSI is reported in the first way , the frequency domain resources at the time of SPS reporting include 4 RBs, which are used to transmit periodic CSI and SPS data services of groups 1 and 2; the frequency domain resources at the time of reporting periodic CSI of group 2 include 2 RBs, used for The periodic CSI of group 1 and group 2 is transmitted; the frequency domain resource at the time of reporting the periodic CSI of group 1 includes 1 RB, which is used for transmitting the periodic CSI of group 1. That is, when the SPS data service and the periodic CSI of group 1 and group 2 are transmitted together, only 4 RBs are needed, which saves 1 RB.

Mode 2: at any reporting moment, if at least two CSIs with different reporting periods need to be reported, report the periodic CSI according to the frequency domain resources determined by the predetermined frequency domain extension rule or the frequency domain extension signaling notified by the base station;

When there is an SPS data service, at any reporting moment, if at least one CSI with a different reporting period needs to be reported and the SPS data service is transmitted, the frequency determined according to the predetermined frequency domain extension rule or the frequency domain extension signaling notified by the base station Domain resources report periodic CSI and transmit SPS data services.

Different groups of periodic CSI information use different UL Grants to indicate the frequency domain resources they need. When different information encounters, the frequency domain resources are reconfigured according to predetermined rules or rules notified by high-level signaling. In addition, the MCS change rule when different information encounters can also be defined in advance or notified through high-layer signaling.

Specifically, the predetermined rule may be: when different information is encountered, the spectrum resource is the superposition of the frequency domain resources indicated by the UL Grant corresponding to the different information; when different information is encountered, the spectrum resource is the UL Grant corresponding to a certain information The frequency domain resource indicated by the Grant increases or decreases by M RBs (M is an integer greater than 1).

What the high-level signaling can notify is which predefined rule is specifically adopted, and what can also be notified is the value of M in the above rule.

For example, take the example shown in Figure 5 as an example, separately configure 3 RBs, 1 RB and 1 RB for SPS, the periodic CSI of group 1 and the periodic CSI of group 2. When the three kinds of information are transmitted together, according to the configuration of SPS The resources are automatically extended downward by 2 RBs; when the periodic CSI of group 1 and the periodic CSI of group 2 meet, the resources configured in group 2 are automatically extended downward by 1 RB.

It should be noted that at any period of CSI reporting time, when the user equipment detects the UL Grant scrambled by the C-RNTI for dynamic scheduling, this step is preferably configured according to the scheduling information of the UL Grant at this time.

In addition, when the base station uses the dynamic scheduling mechanism to schedule the periodic CSI, the user equipment sends the periodic CSI according to the dynamic scheduling information. The reporting of each periodic CSI is scheduled or triggered by a UL Grant. At this time, if the user equipment does not receive the corresponding UL Grant at a certain reporting time, the periodic CSI will not be reported.

In the periodic CSI transmission method provided in this embodiment, the user equipment can use the PUSCH under the configuration and scheduling of the base station, and report the periodic CSI according to the frequency domain resources specified by the UL Grant. Therefore, the base station can perform CSI scheduling through the UL Grant With flexible configuration of information, the user equipment can send periodic CSI on a preferred channel, which can make frequency domain resource utilization more effective.

Corresponding to the foregoing method, an embodiment of the present invention also provides a base station, as shown in FIG. 7 , including:

The sending unit 10 is configured to send transmission configuration information of channel state information CSI to the user equipment, wherein the transmission configuration information includes transmission mode information and reporting time information, and the transmission mode information is used to instruct the user equipment to share the channel state information through the physical layer uplink The channel PUSCH reports the CSI, and the reporting time information is used to indicate the time when the user equipment reports the CSI; the scheduling information of the CSI is sent to the user equipment through the uplink grant information UL Grant;

The first receiving unit 11 is configured to receive the CSI reported by the user equipment according to the transmission configuration information and scheduling information sent by the sending unit 10 .

The base station provided by the embodiment of the present invention can notify the user equipment in advance to use the PUSCH to report CSI, and then notify the user equipment to report the frequency domain resources and MCS of the CSI through the UL Grant, so that the user equipment can perform according to the frequency domain resources and MCS specified by the UL Grant. CSI reporting, therefore, flexible configuration of CSI scheduling information can be performed through UL Grant. Moreover, it is also possible to select appropriate frequency domain resources and MCS for the user equipment according to channel quality changes, and to make more effective use of frequency domain resources.

Wherein, the sending unit 10 is specifically configured to send CSI transmission configuration information to the user equipment through high-layer signaling, and the high-layer signaling is preferably radio resource control RRC signaling.

In one embodiment of the present invention, as shown in FIG. 8, the base station further includes a configuration unit 12 configured to configure the UL Grant for the sending unit 10, and the configured UL Grant is DCI scrambled by SPS C-RNTI , the configured SPS C-RNTI scrambled DCI does not contain data scheduling information, and satisfies one of the following two configurations:

The first configuration includes: the new data of the SPS C-RNTI scrambled DCI indicates that the bit value of the NDI field is "0", and the bit values of the MCS and RV fields are "11101" or "11110" or "11111";

The second configuration includes: the bit value of the NDI domain of the SPS C-RNTI scrambled DCI is "0", and the bit value of each virtual CRC bit is "1";

In another embodiment of the present invention, the UL Grant configured by the configuration unit 12 is DCI scrambled by C-RNTI, and the configured DCI scrambled by SPS C-RNTI does not contain data scheduling information, and satisfies the following One of three configurations:

The third configuration includes: the bit value of the MCS and RV fields of the DCI scrambled by the C-RNTI is "00000", and the number of PRBs is an integer greater than 1;

The fourth configuration includes: the bit value of the MCS and RV fields of the DCI scrambled by the C-RNTI is "11100", and the number of PRBs is 1;

The fifth configuration includes: the bit value of the MCS and RV fields is "11110" or "11111", and the bit value of the CQI request field is "1";

At this time, the sending unit 10 is specifically configured to send CSI scheduling information to the user equipment through the UL Grant configured by the configuring unit 12 .

Optionally, the configuration unit 12 can also be configured to configure different UL Grants for CSIs with different reporting periods; Scheduling information of CSI with different reporting periods.

The base station provided by the embodiment of the present invention can be applied in a scenario where multiple downlink component carriers are aggregated. In a CA system, there are multiple downlink component carriers. In order to use spectrum resources more effectively, the downlink component carriers in a CA system can be grouped, and the downlink component carriers can be divided into at least one group. At this time, the CSI is specifically the CSI of the downlink component carrier. Then, further, as shown in FIG. 9 , the base station in the embodiment of the present invention further includes a determining unit 13, configured to determine the reporting time of the CSI of the downlink component carrier information, the reporting time information includes the reporting period of the CSI of the downlink component carrier and a starting offset within one reporting period, so that:

In the CSI reporting time information of the downlink component carriers of the same group, the reporting period value and the start offset value are the same, and in the CSI reporting time information of the downlink component carriers of different groups, the reporting period value is different, so The aforementioned starting offset values are the same, and the smaller reporting period value is a factor of the larger reporting period value.

When there is an SPS data service, the determining unit 13 is further configured to determine the reporting time information of the CSI of the downlink component carrier according to the transmission period of the SPS data service and the reporting period of the CSI of each group of downlink component carriers, wherein the The reporting time information includes the reporting period of the CSI of the downlink component carrier and a starting offset within the reporting period, so that:

When the transmission period of the SPS data service is the same as the reporting period of the CSI of at least one group of downlink component carriers, in the reporting time information of the CSI of the at least one group of downlink component carriers, the reporting period is the same as that of the SPS data service The transmission cycle is the same, and the starting offset is the same as the starting offset of the SPS data service in one transmission cycle;

When the transmission period of the SPS data service is greater than the CSI reporting period of at least one group of downlink component carriers, in the reporting time information of the CSI of the at least one group of downlink component carriers, the start offset value is the same as the SPS The starting offset value of the data service in a transmission period is the same, and the reporting period value is a factor of the transmission period value of the SPS data service;

When the transmission period of the SPS data service is shorter than the reporting period of the CSI of at least one group of downlink component carriers, in the reporting time information of the CSI of the at least one group of downlink component carriers, the start offset value and the SPS The start offset value of the data service in one transmission period is the same, and the reporting period value is a multiple of the transmission period value of the SPS data service.

At this time, the sending unit 10 is specifically configured to send CSI transmission configuration information to the user equipment, where the transmission configuration information includes transmission mode information and reporting time information determined by the determining unit 13 .

Corresponding to the foregoing method, an embodiment of the present invention also provides a user equipment, as shown in FIG. 10 , including:

The second receiving unit 20 is configured to receive CSI transmission configuration information sent by the base station, wherein the transmission configuration information includes transmission mode information and reporting time information, and the transmission mode information is used to instruct the user equipment to share the channel through the physical layer uplink PUSCH reports CSI, and the reporting time information is used to indicate the time when the user equipment reports the CSI; receiving the CSI scheduling information sent by the base station to the user equipment through the UL Grant;

The reporting unit 21 is configured to report the CSI to the base station through the PUSCH according to the transmission configuration information and scheduling information received by the second receiving unit 20 .

The user equipment provided by the embodiment of the present invention can use the PUSCH under the configuration and scheduling of the base station, and report CSI according to the frequency domain resources specified by the UL Grant. Therefore, the base station can flexibly configure CSI scheduling information through the UL Grant. The user equipment can send CSI on the preferred channel configured for it by the base station, which can make frequency domain resource utilization more effective.

The CSI can be sent on a preferred channel, which can make frequency domain resource utilization more effective.

Wherein, the UL Grant received by the second receiving unit 20 may specifically be SPS C-RNTI scrambled DCI, the SPS C-RNTI scrambled DCI does not contain data scheduling information, and satisfies one of the following two configurations :

The first configuration includes: the new data of the SPS C-RNTI scrambled DCI indicates that the bit value of the NDI field is "0", and the bit values of the MCS and RV fields are "11101" or "11110" or "11111";

The second configuration includes: the bit value of the NDI field of the SPS C-RNTI scrambled DCI is "0", and the bit value of each virtual CRC bit is "1".

The UL Grant received by the second receiving unit 20 may also specifically be C-RNTI scrambled DCI, the C-RNTI scrambled DCI does not contain data scheduling information, and satisfies one of the following three configurations:

The third configuration includes: the bit value of the MCS and RV fields of the DCI scrambled by the C-RNTI is "00000", and the number of PRBs is an integer greater than 1;

The fourth configuration includes: the bit value of the MCS and RV fields of the DCI scrambled by the C-RNTI is "11100", and the number of PRBs is 1;

The fifth configuration includes: the bit value of the MCS and RV fields is "11110" or "11111", and the bit value of the CQI request field is "1".

Wherein, the reporting unit 21 is specifically used for:

At any reporting moment, if at least two CSIs with different reporting periods need to be reported, the CSI is reported only according to the scheduling information of a UL Grant received by the second receiving unit 20, and the UL Grant is the at least two UL Grant corresponding to the largest reporting period among different reporting periods;

At any reporting moment, if at least one CSI with different reporting periods needs to be reported and the SPS data service is transmitted, the reporting of the CSI and the transmission of the SPS data service are only performed according to the scheduling information of a UL Grant received by the second receiving unit 20, The UL Grant is the UL Grant corresponding to the largest period among the reporting period of the CSI and the transmission period of the SPS data service.

In addition, at any CSI reporting moment, the reporting unit 21 is further specifically configured to report the CSI according to the scheduling information of the UL Grant used for dynamic scheduling when the C-RNTI scrambled UL Grant used for dynamic scheduling is monitored. .

Those of ordinary skill in the art can understand that all or part of the process of implementing the above method embodiments can be completed by hardware related to computer program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, Execution includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (20)

1. A method for transmitting CSI, comprising:

the method comprises the steps that a base station sends transmission configuration information of Channel State Information (CSI) to user equipment, wherein the transmission configuration information comprises transmission mode information and reporting time information, the transmission mode information is used for indicating the user equipment to report the CSI through a physical layer uplink shared channel (PUSCH), and the reporting time information is used for indicating the time when the user equipment reports the CSI;

the base station sends CSI scheduling information to the user equipment through uplink Grant information (UL Grant);

and the base station receives CSI reported by the user equipment according to the transmission configuration information and the scheduling information.

2. The transmission method according to claim 1,

the UL Grant is specifically as follows: downlink control information DCI scrambled by semi-persistent scheduling SPS radio network temporary identifier C-RNTI;

before the base station sends the scheduling information of the CSI to the user equipment through the uplink Grant information UL Grant, the method further includes:

the base station configures the DCI scrambled by the SPS C-RNTI, so that the configured DCI scrambled by the SPS C-RNTI does not contain scheduling information of data and one of the following two configurations is met:

the first configuration includes: the new data of the DCI scrambled by the SPS C-RNTI indicates that the bit value of the NDI domain is '0', and the bit values of the modulation coding scheme MCS and the redundancy version RV domain are '11101' or '11110' or '11111';

the second configuration includes: and the bit value of the NDI field of the DCI scrambled by the SPS C-RNTI is '0', and the bit value of each virtual Cyclic Redundancy Check (CRC) bit is '1'.

3. The transmission method according to claim 1,

the UL Grant is specifically as follows: DCI scrambled by C-RNTI;

before the base station sends the scheduling information of the CSI to the user equipment through the uplink Grant information UL Grant, the method further includes:

configuring the DCI scrambled by the C-RNTI, so that the configured DCI scrambled by the C-RNTI does not contain scheduling information of data and one of the following three configurations is satisfied:

the third configuration includes: the bit values of the MCS and RV domains of the DCI scrambled by the C-RNTI are 00000, and the number of PRBs (physical resource blocks) is an integer larger than 1;

the fourth configuration includes: the bit values of the MCS and RV domains of the DCI scrambled by the C-RNTI are '11100', and the number of PRBs is 1;

the fifth configuration includes: the bit values of the MCS and RV fields are "11110" or "11111", and the bit value of the CQI request field is "1".

4. The transmission method according to claim 1, wherein the method is applied to a scenario of aggregation of multiple downlink element carriers, where the CSI is specifically CSI of downlink element carriers, and the multiple downlink element carriers are divided into at least one group;

before the base station sends the transmission configuration information of the channel state information CSI to the user equipment, the method further includes:

the base station determines reporting time information of the CSI of the downlink unit carrier, wherein the reporting time information includes a reporting period of the CSI of the downlink unit carrier and an initial offset in the reporting period, so that:

the reporting period value and the starting offset value are the same in the reporting time information of the CSI of the downlink unit carriers of the same group, the reporting period values are different and the starting offset values are the same in the reporting time information of the CSI of the downlink unit carriers of different groups, and the small reporting period value is a factor of the large reporting period value.

5. The transmission method according to claim 4, wherein the determining, by the base station, reporting time information of the CSI of the downlink cell carrier includes:

when an SPS data service exists, determining reporting time information of CSI of downlink unit carriers according to a transmission period of the SPS data service and a reporting period of the CSI of each group of downlink unit carriers, wherein the reporting time information comprises the reporting period of the CSI of the downlink unit carriers and an initial offset in one reporting period, so that:

the transmission period of the SPS data service is the same as the reporting period of the CSI of at least one group of downlink unit carriers, the reporting period is the same as the transmission period of the SPS data service in the reporting time information of the CSI of the at least one group of downlink unit carriers, and the initial offset is the same as the initial offset of the SPS data service in one transmission period;

when the transmission period of the SPS data service is greater than the reporting period of the CSI of at least one group of downlink unit carriers, in the reporting time information of the CSI of the at least one group of downlink unit carriers, the starting offset value is the same as the starting offset value of the SPS data service in one transmission period, and the reporting period value is a factor of the transmission period value of the SPS data service;

when the transmission period of the SPS data service is less than the reporting period of the CSI of at least one group of downlink component carriers, in the reporting time information of the CSI of the at least one group of downlink component carriers, the starting offset value is the same as the starting offset value of the SPS data service in one transmission period, and the reporting period value is a multiple of the transmission period value of the SPS data service.

6. The transmission method according to claim 1, wherein before the base station sends the scheduling information of the CSI to the user equipment through the uplink Grant information UL Grant, the method further comprises:

the base station configures different UL Grants for CSI with different reporting periods;

the base station sends the scheduling information of the CSI to the user equipment through the uplink Grant information (UL Grant) and comprises the following steps:

and the base station respectively sends the scheduling information of the CSI with different reporting periods to the user equipment through the configured different UL Grants.

7. A method for transmitting CSI, comprising:

the method comprises the steps that user equipment receives transmission configuration information of CSI sent by a base station, wherein the transmission configuration information comprises transmission mode information and reporting time information, the transmission mode information is used for indicating the user equipment to report the CSI through a physical layer uplink shared channel (PUSCH), and the reporting time information is used for indicating the time when the user equipment reports the CSI;

the user equipment receives scheduling information of CSI sent to the user equipment by the base station through the UL Grant;

and the user equipment reports CSI to the base station through a PUSCH according to the transmission configuration information and the scheduling information.

8. The transmission method according to claim 7,

the UL Grant is specifically downlink control information DCI scrambled by SPS C-RNTI, the DCI scrambled by SPS C-RNTI does not contain scheduling information of data, and one of the following two configurations is satisfied:

the first configuration includes: the new data of the SPS C-RNTI scrambled DCI indicates that the bit value of the NDI domain is '0', and the bit values of the MCS and RV domains are '11101' or '11110' or '11111';

the second configuration includes: and the bit value of the NDI field of the DCI scrambled by the SPS C-RNTI is '0', and the bit value of each virtual CRC bit is '1'.

9. The transmission method according to claim 7,

the UL Grant is specifically as follows: the DCI scrambled by the C-RNTI does not contain scheduling information of data and meets one of the following three configurations:

the third configuration includes: the bit values of the MCS and RV domains of the DCI scrambled by the C-RNTI are 00000, and the number of PRBs (physical resource blocks) is an integer larger than 1;

the fourth configuration includes: the bit values of the MCS and RV domains of the DCI scrambled by the C-RNTI are '11100', and the number of PRBs is 1;

the fifth configuration includes: the bit values of the MCS and RV fields are "11110" or "11111", and the bit value of the CQI request field is "1".

10. The transmission method according to claim 7,

the reporting of the CSI according to the transmission configuration information and the scheduling information includes:

at any reporting time, if at least two pieces of CSI with different reporting periods need to be reported, reporting the CSI only according to scheduling information of one UL Grant, wherein the UL Grant is the UL Grant corresponding to the largest reporting period of the at least two different reporting periods;

or

At any reporting time, if at least one CSI with different reporting periods needs to be reported and SPS data services are transmitted, the reporting of the CSI and the transmission of the SPS data services are carried out only according to scheduling information of one UL Grant, wherein the UL Grant is the UL Grant corresponding to the largest period in the reporting period of the CSI and the transmission period of the SPS data services.

11. A base station, comprising:

the sending unit is used for sending transmission configuration information of Channel State Information (CSI) to user equipment, wherein the transmission configuration information comprises transmission mode information and reporting time information, the transmission mode information is used for indicating the user equipment to report the CSI through a physical layer uplink shared channel (PUSCH), and the reporting time information is used for indicating the time when the user equipment reports the CSI; sending CSI scheduling information to the user equipment through an uplink Grant (UL Grant);

and a first receiving unit, configured to receive CSI reported by the user equipment according to the transmission configuration information and the scheduling information sent by the sending unit.

12. The base station of claim 11, further comprising a configuration unit, configured to configure the UL Grant for the transmitting unit, where the configured UL Grant is a DCI scrambled by an SPS C-RNTI, and the configured DCI scrambled by the SPS C-RNTI does not include scheduling information of data, and satisfies one of the following two configurations:

the first configuration includes: the new data of the SPS C-RNTI scrambled DCI indicates that the bit value of the NDI domain is '0', and the bit values of the MCS and RV domains are '11101' or '11110' or '11111';

the second configuration includes: the bit value of the NDI field of the DCI scrambled by the SPS C-RNTI is '0', and the bit value of each virtual CRC bit is '1';

then, the sending unit is specifically configured to send, to the user equipment, scheduling information of CSI through the ULGrant configured by the configuration unit.

13. The base station of claim 11, further comprising a configuration unit, configured to configure the UL Grant for the transmitting unit, where the configured UL Grant is DCI scrambled by C-RNTI, and the configured DCI scrambled by SPS C-RNTI does not contain scheduling information of data, and satisfies one of the following three configurations:

the third configuration includes: the bit values of the MCS and RV domains of the DCI scrambled by the C-RNTI are 00000, and the number of PRBs (physical resource blocks) is an integer larger than 1;

the fourth configuration includes: the bit values of the MCS and RV domains of the DCI scrambled by the C-RNTI are '11100', and the number of PRBs is 1;

the fifth configuration includes: the bit value of the MCS and RV domain is '11110' or '11111', and the bit value of the CQI request domain is '1';

then, the sending unit is specifically configured to send, to the user equipment, scheduling information of CSI through the ULGrant configured by the configuration unit.

14. The base station of claim 11,

the base station is applied to a scene of aggregation of a plurality of downlink unit carriers, wherein the CSI is specifically CSI of the downlink unit carriers, and the downlink unit carriers are divided into at least one group;

the base station further includes a determining unit, configured to determine reporting time information of the CSI of the downlink component carrier, where the reporting time information includes a reporting period of the CSI of the downlink component carrier and a starting offset in the reporting period, so that:

in the reporting time information of the CSI of the downlink unit carriers of the same group, the reporting period value and the initial offset value are the same, and in the reporting time information of the CSI of the downlink unit carriers of different groups, the reporting period values are different, the initial offset values are the same, and a small reporting period value is a factor of a large reporting period value;

the sending unit is specifically configured to send transmission configuration information of the channel state information CSI to the user equipment, where the transmission configuration information includes transmission mode information and reporting time information determined by the determining unit.

15. The base station of claim 14, wherein when there is an SPS data service, the determining unit is further configured to determine reporting time information of the CSI of the downlink component carrier according to the transmission period of the SPS data service and the reporting period of the CSI of each set of downlink component carriers, so that:

the transmission period of the SPS data service is the same as the reporting period of the CSI of at least one group of downlink unit carriers, the reporting period is the same as the transmission period of the SPS data service in the reporting time information of the CSI of the at least one group of downlink unit carriers, and the initial offset is the same as the initial offset of the SPS data service in one transmission period;

when the transmission period of the SPS data service is greater than the reporting period of the CSI of at least one group of downlink unit carriers, in the reporting time information of the CSI of the at least one group of downlink unit carriers, the starting offset value is the same as the starting offset value of the SPS data service in one transmission period, and the reporting period value is a factor of the transmission period value of the SPS data service; when the transmission period of the SPS data service is less than the reporting period of the CSI of at least one group of downlink component carriers, in the reporting time information of the CSI of the at least one group of downlink component carriers, the starting offset value is the same as the starting offset value of the SPS data service in one transmission period, and the reporting period value is a multiple of the transmission period value of the SPS data service.

16. The base station of claim 11, further comprising a configuration unit, configured to configure different UL grants for CSI with different reporting periods;

the sending unit is specifically configured to send the scheduling information of the CSI with different reporting periods to the user equipment through different ulgrants configured by the configuration unit, respectively.

17. A user device, comprising:

a second receiving unit, configured to receive transmission configuration information of CSI sent by a base station, where the transmission configuration information includes transmission mode information and reporting time information, the transmission mode information is used to instruct a user equipment to report the CSI through a physical layer uplink shared channel PUSCH, and the reporting time information is used to instruct the user equipment to report the CSI at a time; receiving scheduling information of CSI (channel state information) sent to the user equipment by the base station through the UL Grant;

and a reporting unit, configured to report CSI to the base station through a PUSCH according to the transmission configuration information and the scheduling information received by the second receiving unit.

18. The user equipment of claim 17,

the UL Grant received by the second receiving unit is specifically SPS C-RNTI scrambled downlink control information DCI, where the SPS C-RNTI scrambled DCI does not include scheduling information of data and satisfies at least one of the following two configurations:

the first configuration includes: the new data of the SPS C-RNTI scrambled DCI indicates that the bit value of the NDI domain is '0', and the bit values of the MCS and RV domains are '11101' or '11110' or '11111';

the second configuration includes: and the bit value of each virtual CRC check bit of the DCI scrambled by the SPS C-RNTI is 1.

19. The user equipment of claim 17,

the UL Grant received by the second receiving unit is specifically DCI scrambled by C-RNTI, and the DCI scrambled by C-RNTI does not include scheduling information of data and satisfies one of the following three configurations:

the third configuration includes: the bit values of the MCS and RV domains of the DCI scrambled by the C-RNTI are 00000, and the number of PRBs (physical resource blocks) is an integer larger than 1;

the fourth configuration includes: the bit values of the MCS and RV domains of the DCI scrambled by the C-RNTI are '11100', and the number of PRBs is 1;

the fifth configuration includes: the bit values of the MCS and RV fields are "11110" or "11111", and the bit value of the CQI request field is "1".

20. The ue of claim 17, wherein the reporting unit is specifically configured to:

at any reporting time, if at least two pieces of CSI with different reporting periods need to be reported, reporting the CSI only according to scheduling information of one type of UL Grant received by the second receiving unit, wherein the UL Grant is the UL Grant corresponding to the largest reporting period in the at least two different reporting periods;

or

At any reporting time, if at least one CSI with different reporting periods needs to be reported and SPS data services are transmitted, reporting the CSI and transmitting the SPS data services only according to scheduling information of one UL Grant received by the second receiving unit, where the UL Grant is a UL Grant corresponding to a maximum period of a reporting period of the CSI and a transmission period of the SPS data services.

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