WO2016127488A1

WO2016127488A1 - Configuration information notification method and acquisition method, device, base station and terminal

Info

Publication number: WO2016127488A1
Application number: PCT/CN2015/076579
Authority: WO
Inventors: 陈艺戬; 李儒岳; 鲁照华
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-02-12
Filing date: 2015-04-14
Publication date: 2016-08-18
Also published as: CN105991222A; CN105991222B

Abstract

Provided are a configuration information notification method and acquisition method, device, base station and terminal. The configuration information notification method comprises: selecting a notification mode for notifying the terminal of parameter configuration information, and notifying the terminal by the selected notification mode, wherein the parameter comprises at least one of the following parameters: a channel measurement pilot frequency parameter, a zero-power measurement pilot frequency parameter and an interference measurement resource parameter, and the notification mode comprises: transmitting, in a resource corresponding to a specific search space, the parameter configuration information; and/or, transmitting, in a resource corresponding to a common search space, the parameter configuration information. The present invention addresses the problem in the related art of the existing high signaling overhead, thus reducing the signaling overhead.

Description

Configuration information notification method, acquisition method, device, base station and terminal

Technical field

The present invention relates to the field of communications, and in particular, to a configuration information notification method, an acquisition method, an apparatus, a base station, and a terminal.

Background technique

In wireless communication systems, the transmitting end often takes the use of multiple antennas to achieve higher transmission rates. Multiple antennas can improve the signal-to-noise ratio and support more spatial multiplexing layers. Compared with the open-loop multi-input and multi-output (Channel-information (CSI)), the channel does not use the channel state information (CSI). Input Multi-output (MIMO) technology, MIMO technology using CSI information (closed-loop MIMO precoding) has higher capacity and is widely used in the mainstream fourth-generation communication (4G) standard. The core idea of the closed-loop MIMO precoding technology of the transmission technology is that the receiving end feeds back the channel information to the transmitting end, and the transmitting end uses some transmitting precoding techniques according to the obtained channel information, which greatly improves the transmission performance. For single-user MIMO, the precoding with the channel feature vector information can be directly used for precoding. For multi-user MIMO, more accurate channel information is needed for interference cancellation. Therefore, the acquisition of channel information at the transmitting end plays a very important role.

In some technologies of 4G, such as Long Term Evolution (LTE)/Long-Term Evolution Advance (LTE-A), 802.16m standard specification, Frequency Division Duplexing The general procedure for obtaining the downlink channel information of the system is referred to as FDD:

S1: The transmitting end (base station) sends a Channel State Information (Reference Signals, referred to as CSI-RS) to the receiving end. Generally, each channel transmits a channel measurement pilot signal. The channel measurement pilot signals transmitted by different antennas are staggered in the time-frequency domain or the code domain, and the orthogonality can be maintained without mutual interference. Each antenna corresponds to one CSI-RS port. The channel measurement pilot is used to measure channel information. CSI-RS transmission of the maximum 8 antenna port on the base station side is supported in LTE-A. The base station further sends radio resource control (Radio Resource Control, RRC for short) signaling to configure relevant location information and transmission period information of the CSI-RS to the terminal. The content of the transmission of the pilot signal on the base station side is determined by some pre-agreed rules, and the terminal can accurately know the content of the pilot signal transmission of each port at each time-frequency position on the base station side.

S2: The terminal receives the configuration information of the channel information measurement pilot CSI-RS transmitted by the base station side, and performs CSI-RS pilot signal reception and detection at the frequency position of each pilot port that is signaled, and each terminal on the terminal side Receiving The received CSI-RS pilot signal is obtained on the antenna. Since the terminal and the base station have agreed on the content of the pilot transmission signal at each time-frequency resource location of each transmission port, the terminal can accurately know the downlink pilot transmission signal, and thus the terminal. According to the received pilot signal, downlink channel estimation can be performed to obtain downlink channel response information between the terminal side receiving antenna and the base station side transmitting antenna port. In the downlink channel estimation, it is necessary to consider the influence of noise and interference when the actual pilot signal is received. Least square (Least Square, LS for short) and Minimum Mean Square Error (MMSE for short) can be used. An algorithm such as Interference Rejection Combining (IRC) performs channel estimation, and finally obtains a downlink channel matrix matching the number of domain transmission ports at each time-frequency resource location.

S3: The terminal can estimate the channel response between the receiving antenna and the multiple transmitting antenna ports according to the content of the transmitted pilot signal of each pilot port and the received pilot signal on each receiving antenna, so that the time-frequency resource location can be obtained. The channel matrix, in turn, can calculate the optimal CSI information according to the channel matrix. The CSI generally includes three types: a Precoding Matrix Indicator (PMI)/Channel Quality Indicator (CQI)/Rank Indicator (abbreviated as RI) information. The precoding matrix, the channel quality information, and the number of transmission layers are recommended to the base station respectively. The terminal feeds back the calculated CQI/PMI/RI information to the base station through the control channel of the uplink physical layer or the data channel of the uplink physical layer. The base station determines the number of transmission layers based on the feedback information of the terminal, determines the coding modulation mode, and determines the transmission precoding.

It can be seen that the downlink channel information measurement pilot CSI-RS plays a very important role in the acquisition of channel state information, and often affects the accuracy of precoding information, channel quality information and transmission layer number information, and thus for MIMO. Transmission performance has a very large impact.

The downlink CSI-RS pilots used in the 4G standard are periodic CSI-RS pilots. In the time domain, considering that the channel changes are not abruptly changed, there is a certain time domain correlation, and the correlation time is greater than one subframe. The duration is 1ms, so it is not necessary to send all subframes. Since all UEs can share CSI-RS, CSI-RS is generally sent periodically. The so-called periodic pilot, the concept is that the base station performs CSI-RS transmission according to a certain periodic interval, and the transmission position may have different subframe position offsets. For example, the CSI-RS period and the subframe offset in the LTE-A are defined as follows:

Table 1

The specification in the standard 36.211 of LTE is as shown in Table 1, that is, CSI reference signal subframe configuration.

In Table 1, the I _CSI-RS is a configuration parameter of the CSI-RS, and the value is 0-154. Different values correspond to different CSI-RS periods and subframe offsets. FIG. 1 is a schematic diagram of subframe position transmission corresponding to a CSI-RS configuration example in the related art, corresponding to configurations of I _CSI-RS =0, I _CSI-RS = 2, and I _CSI-RS = 5.

In the time domain location, each physical resource block (PRB) pair has a CSI-RS in the pair, and the same port has the same transmission pattern in different PRB pairs. A pattern of a CSI-RS is shown in FIG. 2. FIG. 2 is a schematic diagram of a CSI-RS Pattern in LTE in the related art. The PRB pair can refer to the provisions in the LTE protocol 36.211. A typical case includes 12 frequency domain subcarriers and 14 time domain orthogonal frequency division multiplexing (OFDM) symbols.

In the LTE system, there are 40 resource elements (Resource Element, RE for short) in a PRB pair that can be used as CSI-RS. These REs are preferably divided into five patterns, each pattern containing 8 REs, as above. The figure shows. The average CSI-RS pilot occupies 1 RE in a PRB pair. All ports belonging to a CSI-RS resource need to be limited to a pattern #i as shown in FIG. 2. At present, a set of CSI-RS supports a maximum of 8 ports. Therefore, when the port is 8, there are five kinds of position candidates. When the number of ports is 4, there are 10 types of positions that can be configured. When the number of ports is 2, there are 20 configurations.

In addition to the periodic CSI-RS pilots introduced above, we will introduce the newly proposed aperiodic CSI-RS pilots. An aperiodic CSI-RS is a pilot that is triggered by a base station in real time. The pilot is generally sent for channel measurement of a specific user equipment (UE) or UE group, and is not continuously transmitted. It exists only in one or In a few sub-frames. Compared with the periodic pilot, the non-periodic pilot has the advantage of being more flexible and having less pilot overhead.

The sending position of the aperiodic CSI-RS can be obtained after the terminal transmits the control information transmitted in the Physical Downlink Control Channel (PDCCH) or the Enhanced Physical Downlink Control Channel (ePDCCH). The pilot detection may be performed at the corresponding position. Like the periodic CSI-RS, the pilot transmission symbol information of the aperiodic CSI-RS may be acquired in advance by the terminal in an agreed manner, so that the terminal receiving antenna and the terminal can be estimated. The base station transmits a downlink channel response between the antennas to obtain a channel matrix.

There are two typical types of non-periodic pilot transmissions, one is transmitted in the Physical Downlink Shared Channel (PDSCH) of the user that needs to measure using the aperiodic CSI-RS, and the other is transmitted. The aperiodic CSI-RS contention resource pool of all users is allocated in the cell, and then allocated to different user resources based on the resource pool. As shown in Figure 3 below, Figure 3 is a non-week in the related art. Period CSI-RS time-frequency domain location map. The aperiodic CSI-RS contention resource pool may be a set of periodic CSI-RS transmission resource locations.

It is noted that the aperiodic CSI-RS is generally oriented to a specific user, rather than all users in the cell. Therefore, the aperiodic CSI-RS is a method that can support precoding, which can effectively reduce the number of ports, and can preferably reduce the calculation amount of CSI feedback. Therefore, the aperiodic CSI-RS can be selected to transmit in the form of precoded beam pilots or non-precoded non-beam pilots as needed. One problem with related technologies is:

In the related art, the flexibility of the aperiodic CSI-RS is required to be ensured by dynamic signaling, so that the precoding type, the time-frequency domain location, the transmission density, and the number of ports of the aperiodic CSI-RS can be dynamically changed to adapt. Different terminals and transmission scenarios, so the related art generally considers carrying non-periodic pilots in a downlink control channel (PDCCH) (introduced by the Rel-8 version) or an enhanced downlink control channel (Enhanced-PDCCH, introduced in the Rel-11 version). Trigger information. The non-periodic pilot flexibility requirement is high, which means that a large number of pilot transmission parameters need to be notified when triggering to obtain better performance, so the physical control signaling overhead of the non-periodic pilot is more than the periodic pilot overhead. A lot bigger. In the case of a large number of terminals, the physical layer control signaling overhead consumes a large amount of downlink transmission resources, resulting in low resource utilization and affecting downlink spectrum efficiency.

It can be seen that although aperiodic CSI-RS has very flexible and very efficient resource utilization, control signaling overhead is an important issue that needs to be solved.

Similar problems with aperiodic CSI-RS configurations are Zero power CSI-RS and Intereference Measurement Resource (IMR) configuration issues. Zero Power CSI-RS is a CSI-RS. The configuration mode of the muting resource is similar to the configuration of the CSI-RS resource. For example, a method that is frequently used is: the same resource location is configured for the terminal 1 to be configured for the CSI-RS to the terminal 2 and may be the Zero Power CSI-RS. At this time, UE2 can be understood that CSI-RS may be sent to other users here. Therefore, the UE cannot be used for data RE transmission, and can correctly understand data-to-resource mapping, and perform accurate rate matching to avoid performance loss.

Another related resource allocation problem is the resource location configuration of the resource IMR used for interference measurement. The IMR is also a designated RE set. In the current mainstream LTE standard, in order to simplify the design, the resource configuration method of Zero Power CSI-RS can be used. To configure the IMR, its resource configuration problem is also a problem that is very relevant to the configuration of the CSI-RS configuration and the Zero-Power CS-RS.

The Zero power CSI-RS resource configuration method has high flexibility for implementing aperiodic dynamic configuration, but an important issue is also the problem of controlling signaling overhead.

IMR often uses the resource configuration method of Zero power CSI-RS to achieve aperiodic IMR. The dynamic configuration of IMR can improve the accuracy of interference measurement and adapt to the dynamic changes of scheduling. But an important issue is also the problem of controlling signaling overhead.

In view of the problem of large signaling overhead in the related art, an effective solution has not been proposed yet.

Summary of the invention

The present invention provides a configuration information notification method, an acquisition method, an apparatus, a base station, and a terminal, so as to at least solve the problem of large signaling overhead existing in the related art.

According to an aspect of the embodiments of the present invention, a configuration information notification method is provided, including: selecting a notification manner for notifying a terminal of configuration information of a parameter, wherein the parameter includes at least one of the following: a channel measurement pilot parameter The zero-power measurement pilot parameter and the interference measurement resource parameter, the notification manner includes: transmitting configuration information of the parameter in a resource corresponding to a user-specific search space (UE-Specific Search Space, USS for short); and Or, the configuration information of the parameter is sent in a resource corresponding to a Common Search Space (CSS); and the terminal is notified by using the selected notification manner.

Preferably, after selecting the notification manner for notifying the terminal of the configuration information of the parameter, the method further includes: notifying, by the high layer signaling, the selected notification manner to the terminal.

Preferably, the configuration information of the parameter is sent in the resource corresponding to the USS, and the configuration information of the parameter is transmitted by using downlink scheduling information in a Downlink Grant (DL Grant). The uplink scheduling information is used to transmit the configuration information of the parameter in an uplink grant (Uplink Grant, abbreviated as UL Grant); and the downlink downlink control information (Downlink Control Identifier, DCI for short) is used to transmit the configuration information. Configuration information for the parameter.

Preferably, when the configuration information of the parameter is transmitted by using the downlink scheduling information in the DL Grant, and the configuration information of the parameter and the downlink scheduling information are transmitted in the same DCI format, according to Determining, by the location of the resource block occupied by the downlink data sharing channel of the terminal, the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero power measurement pilot parameter, and the interference measurement resource A resource block location of at least one of the interference measurement resources corresponding to the parameter.

Preferably, the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero power measurement pilot parameter, and the interference measurement resource are determined according to a location of a resource block occupied by the downlink data sharing channel. The resource block location of at least one of the interference measurement resources corresponding to the parameter includes: a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and the interference measurement resource Parameter pair a resource block location of at least one of the required interference measurement resources is the same as a location of the resource block occupied by the downlink data sharing channel; and/or a pilot for transmitting the channel measurement pilot parameter, The resource block location of the pilot corresponding to the zero power measurement pilot parameter and the interference measurement resource corresponding to the interference measurement resource parameter is a subset of the location of the resource block occupied by the downlink data sharing channel.

Preferably, the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero-power measurement pilot parameter, and the interference measurement resource corresponding to the interference measurement resource parameter are selected to be sent in the resource corresponding to the CSS. Transmitting a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero-power measurement pilot parameter, and the interference measurement resource on a part or all of the resource blocks of the pre-configured resource set At least one of the interference measurement resources corresponding to the parameter.

Preferably, when the uplink scheduling information is used in the UL Grant, the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero-power measurement pilot parameter, and the interference corresponding to the interference measurement resource parameter are used. Transmitting a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and the interference on a part or all of the resource blocks of the pre-configured resource set when at least one of the resources is measured Measuring at least one of the interference measurement resources corresponding to the resource parameters.

Preferably, when using the DCI format to transmit the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero power measurement pilot parameter, and at least the interference measurement resource corresponding to the interference measurement resource parameter And transmitting, according to the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero-power measurement pilot parameter, and the interference measurement resource parameter, on a part or all of the resource blocks of the pre-configured resource set Interfering with at least one of the measurement resources.

Preferably, the pre-configured resource set includes: a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero-power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter. At least one of the high layer configuration signaling is configured.

Preferably, when the parameter includes the channel measurement pilot parameter, when the configuration information of the parameter is transmitted by using the uplink scheduling information in the UL Grant, bits of configuration information of the channel measurement pilot parameter The number of bits of the configuration information of the channel measurement pilot parameter when the configuration information of the parameter is transmitted in the resource corresponding to the CSS is smaller.

Preferably, when the parameter includes the channel measurement pilot parameter and the configuration information of the parameter is sent in a resource corresponding to the USS, using a downlink data sharing channel used for transmitting data to the terminal The resource block transmits a channel measurement pilot corresponding to the channel measurement pilot parameter.

Preferably, the channel measurement pilot comprises precoding measurement pilots and/or non-precoding measurement pilots.

Preferably, when the channel measurement pilot includes the precoding measurement pilot and/or the non-precoding measurement pilot, the physical layer configuration signaling carries a type indicating the channel measurement pilot. Instructions.

Preferably, when the parameter includes the channel measurement pilot parameter and the configuration information of the parameter is sent in a resource corresponding to the CSS, using a subset of the pre-configured resource set to transmit and the channel measurement pilot The channel measurement pilot corresponding to the parameter.

Preferably, the configuration information of the parameter is sent by using the resource corresponding to the USS and the resource corresponding to the CSS, and at least one of the following: using the CSS to transmit a current or specified transmission time interval (TTI) The configuration information of the parameter is sent to the terminal, and the USS sends the configuration information of the parameter corresponding to the terminal to the terminal according to the information notified by the CSS to the terminal. The terminal transmits the configuration information of the parameter by using the resource corresponding to the USS, and sends the configuration information of the remaining part by using the resource corresponding to the CSS.

According to another aspect of the present invention, a configuration information obtaining method includes: receiving information of a notification manner of a configuration information of a parameter notified by a base station, where the parameter includes at least one of the following: a channel measurement guide. The frequency parameter, the zero-power measurement pilot parameter, and the interference measurement resource parameter, the notification manner includes: the base station sending the configuration information of the parameter in a resource corresponding to the dedicated search space (ie, the user-specific search space USS) And/or, the base station sends configuration information of the parameter in a resource corresponding to a public search space (CSS); and acquiring configuration information of the parameter according to the selection information.

Preferably, the selecting information of the notification manner of receiving the configuration information of the parameter notified by the base station comprises: receiving the selection information by using high layer signaling of the base station.

Preferably, the configuration information that the base station sends the parameter in the resource corresponding to the USS includes at least one of: transmitting, by using downlink scheduling information, configuration information of the parameter in a downlink grant (DL Grant); In the uplink grant (UL Grant), the configuration information of the parameter is transmitted by using uplink scheduling information; and the configuration information of the parameter is transmitted by using a proprietary downlink control information format (DCI format).

Preferably, when the base station uses the downlink scheduling information to transmit the configuration information of the parameter in the DL Grant, determining, according to the PDSCH dedicated resource block location indicated in the downlink scheduling information, for transmitting the channel measurement guide. a location of the resource block corresponding to the frequency parameter, the pilot corresponding to the zero power measurement pilot parameter, and the resource block of at least one of the interference measurement resources corresponding to the interference measurement resource parameter.

Preferably, determining, according to a physical downlink shared channel (PDSCH)-specific resource block location indicated in the downlink scheduling information, a pilot corresponding to the channel measurement pilot parameter, and the zero power measurement pilot parameter a pilot, a bit of the resource block of at least one of the interference measurement resources corresponding to the interference measurement resource parameter The method includes: a resource block for transmitting a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and at least one of interference measurement resources corresponding to the interference measurement resource parameter The location of the resource block is the same as the location of the resource block occupied by the PDSCH; and/or, the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero-power measurement pilot parameter, and the interference measurement resource The location of the resource block of at least one of the interference measurement resources corresponding to the parameter is a subset of the resource block locations occupied by the PDSCH.

Preferably, when the base station sends the configuration information of the parameter in the resource corresponding to the USS and the resource corresponding to the CSS, acquiring the configuration information of the parameter according to the selection information includes: detecting the USS corresponding The configuration information of the parameter sent in the resource and the configuration information of the parameter sent in the resource corresponding to the CSS; and the configuration information of the parameter is obtained according to the detection result.

According to another aspect of the embodiments of the present invention, a configuration information notification apparatus is provided, including: a selection module configured to select a notification manner for notifying a terminal of configuration information of a parameter, wherein the parameter includes at least one of the following a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter, where the notification manner includes: transmitting configuration information of the parameter in a resource corresponding to a dedicated search space (USS); and/or, The configuration information of the parameter is sent in a resource corresponding to the public search space (CSS); the first notification module is configured to notify the terminal by using the selected notification manner.

Preferably, the apparatus further includes: a second notification module, configured to notify the terminal of the selected notification manner by high layer signaling.

According to another aspect of an embodiment of the present invention, a base station is provided, comprising the apparatus of any of the above.

According to another aspect of the embodiments of the present invention, a configuration information obtaining apparatus is provided, including: a receiving module, configured to receive selection information of a notification manner of configuration information of a parameter notified by a base station, where the parameter includes at least one of the following a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter, where the notification manner includes: the base station transmitting configuration information of the parameter in a resource corresponding to a dedicated search space (USS); and Or the base station sends configuration information of the parameter in a resource corresponding to a public search space (CSS); and the acquiring module is configured to acquire configuration information of the parameter according to the selection information.

Preferably, the receiving module comprises: receiving the selection information by high layer signaling of the base station.

Preferably, when the base station sends the configuration information of the parameter in the resource corresponding to the USS and the resource corresponding to the CSS, the acquiring module includes: a detecting unit, configured to detect a resource corresponding to the USS The configuration information of the parameter sent by the parameter and the configuration information of the parameter sent by the resource corresponding to the CSS; the acquiring unit is configured to acquire configuration information of the parameter according to the detection result.

According to another aspect of an embodiment of the present invention, there is provided a terminal comprising the apparatus of any of the above.

According to the embodiment of the present invention, a notification manner for selecting configuration information for notifying a terminal, wherein the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter, The notification manner includes: transmitting configuration information of the parameter in a resource corresponding to a dedicated search space (USS); and/or transmitting configuration information of the parameter in a resource corresponding to a public search space (CSS); The notification manner is used to notify the terminal, and the problem of large signaling overhead existing in the related art is solved, thereby achieving the effect of reducing signaling overhead.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of subframe position transmission corresponding to a CSI-RS configuration example in the related art;

2 is a schematic diagram of a CSI-RS Pattern in LTE in the related art;

3 is a non-periodic CSI-RS time-frequency domain location map in the related art;

4 is a flowchart of a configuration information notification method according to an embodiment of the present invention;

FIG. 5 is a flowchart of a method for acquiring configuration information according to an embodiment of the present invention; FIG.

6 is a structural block diagram of a configuration information notifying apparatus according to an embodiment of the present invention;

FIG. 7 is a block diagram showing a preferred configuration of a configuration information notifying apparatus according to an embodiment of the present invention; FIG.

FIG. 8 is a structural block diagram of a base station according to an embodiment of the present invention; FIG.

FIG. 9 is a structural block diagram of a configuration information acquiring apparatus according to an embodiment of the present invention; FIG.

FIG. 10 is a structural block diagram of an obtaining module 94 in a configuration information acquiring apparatus according to an embodiment of the present invention;

11 is a structural block diagram of a terminal according to an embodiment of the present invention;

FIG. 12 is a structural block diagram of a selection mode when a CSI-RS is triggered to be triggered according to an embodiment of the present invention; FIG.

FIG. 13 is a schematic diagram of R resource configuration according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In this embodiment, a configuration information notification method is provided. FIG. 4 is a flowchart of a configuration information notification method according to an embodiment of the present invention. As shown in FIG. 4, the flow includes the following steps:

Step S402, selecting a notification manner for notifying the terminal of the configuration information of the parameter, where the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter, where the notification manner includes: The configuration information of the parameter is sent in the resource corresponding to the USS; and/or the configuration information of the parameter is sent in the resource corresponding to the CSS;

Step S404, notifying the terminal by using the selected notification manner.

Through the above steps, sending the configuration information of the parameter in the resource corresponding to the USS can improve the flexibility of sending the configuration parameter. The configuration information of the parameter sent in the resource corresponding to the CSS can be dynamically triggered according to the requirement at any time, and the resource is not wasted. Therefore, the problem of large signaling overhead existing in the related art is effectively solved, thereby achieving the effect of reducing signaling overhead.

When the sending manner of the notification mode is performed, the sending manner may be performed by using a plurality of sending manners. In an optional embodiment, after selecting the notification manner for notifying the terminal of the configuration information of the parameter, the method further includes: selecting, by using high layer signaling The notification method is notified to the terminal.

In an optional embodiment, the configuration information of the sending parameter in the resource corresponding to the USS includes at least one of: configuring configuration information of the downlink scheduling information transmission parameter in the DL Grant; and using the uplink scheduling information transmission parameter in the UL Grant Configuration information; configuration information of the DCI format transmission parameter using the proprietary downlink control information format.

When the configuration information of the downlink scheduling information transmission parameter is used in the DL Grant, and the parameter configuration information and the downlink scheduling information are transmitted in the same DCI format, the downlink data sharing channel is used according to the data used for transmitting data to the terminal. The location of the resource block determines a resource block location for transmitting at least one of a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter.

And determining, according to the location of the resource block occupied by the downlink data sharing channel, at least one of a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter. The resource block position of one includes: a pilot for transmitting a channel measurement pilot parameter, and zero power The resource block position of at least one of the pilot measurement resource corresponding to the pilot parameter and the interference measurement resource parameter is the same as the resource block occupied by the downlink data sharing channel; and/or used to transmit the channel measurement guide The pilot block corresponding to the frequency parameter, the pilot block corresponding to the zero power measurement pilot parameter, and the resource block location corresponding to at least one of the interference measurement resource parameters are a subset of the location of the resource block occupied by the downlink data sharing channel. .

In an optional embodiment, when the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero-power measurement pilot parameter, and the interference measurement resource corresponding to the interference measurement resource parameter are selected in the resource corresponding to the CSS, At least one of the following, the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero-power measurement pilot parameter, and the interference measurement resource corresponding to the interference measurement resource parameter are sent on part or all of the resource blocks of the pre-configured resource set. At least one.

Wherein, when at least one of the pilot corresponding to the uplink scheduling information transmission channel measurement pilot parameter, the pilot corresponding to the zero-power measurement pilot parameter, and the interference measurement resource corresponding to the interference measurement resource parameter is used in the UL Grant, At least one of a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero-power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter is sent on part or all of the resource blocks of the pre-configured resource set.

When at least one of the pilot corresponding to the pilot parameter of the DCI format transmission channel measurement, the pilot corresponding to the zero-power measurement pilot parameter, and the interference measurement resource corresponding to the interference measurement resource parameter is used, the part of the pre-configured resource set is used. And transmitting, by the resource block, at least one of a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter.

In an optional embodiment, the pre-configured resource set includes at least one of a pilot corresponding to a channel measurement pilot parameter, a pilot corresponding to a zero-power measurement pilot parameter, and an interference measurement resource corresponding to an interference measurement resource parameter. One of the high-level configuration signaling is configured.

When the parameter includes the channel measurement pilot parameter, when the configuration information of the uplink scheduling information transmission parameter is used in the UL Grant, the number of bits of the configuration information of the channel measurement pilot parameter is smaller than the configuration information of the transmission parameter in the resource corresponding to the CSS. The number of bits of the configuration information of the channel measurement pilot parameters.

In an optional embodiment, when the parameter includes the channel measurement pilot parameter and the configuration information of the parameter is sent in the resource corresponding to the USS, the resource block used by the downlink data sharing channel used for sending data to the terminal is used. A channel measurement pilot corresponding to a channel measurement pilot parameter.

In an optional embodiment, the channel measurement pilots described above include precoding measurement pilots and/or non-precoded measurement pilots.

When the channel measurement pilot includes a precoding measurement pilot and/or a non-precoding measurement pilot, the physical layer configuration signaling carries indication information indicating a type of channel measurement pilot.

In an optional embodiment, when the parameter includes a channel measurement pilot parameter and the configuration information of the parameter is sent in a resource corresponding to the CSS, the subset corresponding to the channel measurement pilot parameter is sent by using a subset of the pre-configured resource set. Channel measurement pilot.

In an optional embodiment, the configuration information of the resource transmission parameter corresponding to the resource corresponding to the USS and the CSS includes at least one of the following: sending, by using the CSS, configuration information of the parameter in the current or specified transmission time interval TTI to the terminal. The USS sends the configuration information of the parameters corresponding to the terminal configuration terminal to the terminal according to the CSS notification information, and uses the resource corresponding to the USS to send the configuration information of the partial parameters, and uses the resources corresponding to the CSS to send the configuration information of the remaining parameters.

FIG. 5 is a flowchart of a method for acquiring configuration information according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:

Step S502: Receive selection information of a notification manner of configuration information of a parameter notified by a base station, where the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter, where the notification manner includes The base station sends the configuration information of the parameter in the resource corresponding to the USS; and/or, the base station sends the configuration information of the parameter in the resource corresponding to the CSS;

Step S504, acquiring configuration information of the parameter according to the selection information.

When receiving the foregoing selection information, there may be multiple receiving modes. In an optional embodiment, the foregoing selection information may be received by high layer signaling of the base station.

The configuration information of the sending parameter of the base station in the resource corresponding to the USS includes at least one of: configuring configuration information of a downlink scheduling information transmission parameter in a DL Grant; and using configuration information of an uplink scheduling information transmission parameter in the UL Grant; Configuration information of the DCI format transmission parameter of the proprietary downlink control information format.

In an optional embodiment, when the base station uses the configuration information of the downlink scheduling information transmission parameter in the DL Grant, determining, according to the PDSCH-specific resource block location indicated in the downlink scheduling information, the transmission channel measurement. The pilot node corresponding to the quantity pilot parameter, the pilot position corresponding to the zero power measurement pilot parameter, and the location of the resource block of at least one of the interference measurement resources corresponding to the interference measurement resource parameter.

The interference measurement resource corresponding to the pilot and the zero-power measurement pilot parameter corresponding to the pilot and the interference measurement resource parameter is determined according to the PDSCH-specific resource block position indicated in the downlink scheduling information. The location of the resource block of at least one of the following includes: at least one of a pilot corresponding to a transmission channel measurement pilot parameter, a pilot corresponding to a zero power measurement pilot parameter, and an interference measurement resource corresponding to an interference measurement resource parameter. The location of the resource block is the same as the location of the resource block occupied by the PDSCH; and/or the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero power measurement pilot parameter, and the interference measurement resource corresponding to the interference measurement resource parameter The location of the resource block of at least one of the resources is a subset of the resource block locations occupied by the PDSCH.

In an optional embodiment, when the base station sends the configuration information of the parameter in the resource corresponding to the USS and the resource corresponding to the CSS, the configuration information of obtaining the parameter according to the selection information includes: detecting the configuration of the parameter sent in the resource corresponding to the USS. The configuration information of the parameter sent in the resource corresponding to the information and the CSS; and the configuration information of the parameter is obtained according to the detection result.

In the embodiment, a configuration information notification device is provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 6 is a structural block diagram of a configuration information notifying apparatus according to an embodiment of the present invention. As shown in FIG. 6, the apparatus includes a selecting module 62 and a first notifying module 64, which will be described below.

The selecting module 62 is configured to select a notification manner for notifying the terminal of the configuration information of the parameter, where the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, an interference measurement resource parameter, and a notification manner. The method includes: transmitting configuration information of the parameter in the resource corresponding to the USS; and/or transmitting configuration information of the parameter in the resource corresponding to the CSS; the first notification module 64 is connected to the selection module 62, and configured to use the selected notification manner Notify the terminal.

FIG. 7 is a block diagram showing a preferred structure of a configuration information notifying apparatus according to an embodiment of the present invention. As shown in FIG. 7, the apparatus includes a second notification module 72 in addition to all the modules shown in FIG. Be explained.

The second notification module 72 is connected to the selection module 62, and is configured to notify the terminal of the selected notification manner by high layer signaling.

FIG. 8 is a structural block diagram of a base station according to an embodiment of the present invention. As shown in FIG. 8, the base station 82 includes the configuration information notifying means 84 of any of the above.

FIG. 9 is a structural block diagram of a configuration information acquiring apparatus according to an embodiment of the present invention. As shown in FIG. 9, the apparatus includes a receiving module 92 and an obtaining module 94, which are described below:

The receiving module 92 is configured to receive the selection information of the notification manner of the configuration information of the parameter notified by the base station, where the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter. The notification mode includes: the base station sends the configuration information of the parameter in the resource corresponding to the USS; and/or, the base station sends the configuration information of the parameter in the resource corresponding to the CSS; the obtaining module 94 is connected to the receiving module 92, and is set according to the selection information. Get the configuration information of the parameter.

The receiving module 92 includes: receiving selection information by using high layer signaling of the base station.

FIG. 10 is a block diagram showing the structure of the obtaining module 94 in the configuration information acquiring apparatus. As shown in FIG. 10, the acquiring module 94 includes a detecting unit 102 and an obtaining unit 104. The acquiring module 94 will be described below.

The detecting unit 102 is configured to: when the base station sends the configuration information of the parameter in the resource corresponding to the USS and the resource corresponding to the CSS, the configuration information of the parameter sent in the resource corresponding to the USS and the configuration information of the parameter sent in the resource corresponding to the CSS are detected. The obtaining unit 104 is connected to the detecting unit 102, and is configured to acquire configuration information of the parameter according to the detection result.

FIG. 11 is a structural block diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 11, the terminal 112 includes the configuration information acquiring device 114 of any of the above.

The present invention will be described below in conjunction with specific embodiments:

In this embodiment, the base station may have multiple CSI-RS parameter information configuration modes, and different CSI-RS parameter configuration modes mainly take into account different characteristics of the current subframe (with or without uplink and downlink data scheduling), CSI guide. Frequency characteristics and flexibility requirements (pilot position change, power change, density change, port change, type change, etc.), control channel capacity (number of users, PDCCH/EPDCCH capacity, etc.).

First, the base station side can select the transmission mode of the CSI-RS parameter in the corresponding resource in the CSS by using the transmission mode of the public control signaling. This method has a significant improvement over the previous configuration of CSI-RS pilot parameters completely through RRC signaling, that is, the information is the control signaling of the physical layer, which can be triggered dynamically according to requirements at any time without causing resources. Waste. It is noted that the control signaling transmitted in all the public spaces is directed to multiple UEs, and can be considered as facing one UE group, and all terminals in the UE group can detect Go to this information. Then, obviously, the signaling-triggered aperiodic CSI-RS should also be a channel measurement pilot resource shared by multiple UEs for a group of UEs. In this way, both the dynamic characteristics and the large overhead caused by sending control signaling for each UE are avoided, and since the pilots are shared, excessive pilot overhead is also avoided.

Secondly, the base station can also select to transmit in the form of proprietary control signaling. For example, the base station can be used in the DL Grant/UL Grant/Private for pilot triggering DCI Format (DL Grant is a general term for DCI formats for downlink scheduling information). The UL Grant is a general name for the DCI formats used for the uplink scheduling information. The CSI-RSs sent in this manner are generally UE specific (specific UE-specific), relative to the public control signal. In the manner of the command, the sending method of the configuration parameter is very flexible, and is a supplement to the flexibility of the former method. For example, the pre-coded CSI-RS can be transmitted to reduce the overhead, and the flexible change can be performed. The virtualization mode of the CSI-RS port. The virtualization method here is a commonly used concept in the industry. Generally, one or more actual physical antenna transmitting units are mapped to a port by precoding. This approach compensates for the flexibility of the previous approach.

The multiple physical layer pilot configuration manners in this embodiment enable the base station to control the physical layer signaling overhead, CSI-RS pilot overhead, and provide sufficient flexibility and channel measurement. The accuracy.

For zero-power CSI-RS, the base station can also have multiple configurations of Zero power CSI-RS parameter information. Different Zero power CSI-RS parameter configuration methods mainly consider matching non-zero power CSI in the current subframe. Flexibility in RS parameter configuration.

For the IMR, the base station can also be configured with multiple IMR resource locations. Different IMR resource location configurations mainly consider the flexibility of matching the Zero power CSI-RS parameter configuration in the current subframe.

Example 1:

The present embodiment is used to describe how the base station side selects an appropriate manner from multiple modes to perform notification of CSI-RS pilot configuration parameters. FIG. 12 is a structural block diagram of a method for selecting a CSI-RS triggering method according to an embodiment of the present invention. Among them, the way to notify candidates is as follows:

The configuration information for transmitting each parameter in the resource corresponding to the USS is defined as mode 1, and the configuration information for transmitting each parameter in the resource corresponding to the CSS is defined as mode 2.

At the same time, it is stipulated that the configuration information of the above parameters is transmitted together with the downlink scheduling information in the DL Grant as the sub-mode 1 of the mode 1, and the configuration information of each parameter is transmitted together with the uplink scheduling information in the UL Grant as the sub-mode 2 of the mode 1. The configuration information of each parameter is transmitted by using the proprietary DCI format as sub-mode 3 of mode 1.

When notifying the CSI-RS trigger, only one of the notifications (method 1 or mode 2) is selected:

Case a1: The number of users who need to perform CSI-RS measurement at the same time is relatively large, and most of them belong to the traditional UE. The supported feedback dimension is not very high, or the channel correlation specialization is relatively uncorrelated, and it is suitable to use non-precoding. The CSI-RS performs measurement, and it is expected to perform measurement of full bandwidth or large bandwidth. In this case, a preferred option is to perform CSI-RS pilot parameter configuration and triggering by using public control signaling. Control signaling and sharing CSI-RS resources can effectively save signaling and pilot port overhead compared to each UE separately informing pilot configuration parameters and triggering pilots separately. Compared with the notification method of RRC signaling, this method realizes that the time domain can be triggered at any time, and there is no demand and no triggering, and efficient pilot resource utilization can be achieved.

Case b1: Users who currently need to perform CSI-RS measurement have downlink PDSCH transmission, and since channel measurement has been performed on the shared CSI-RS resource before, it is desirable to perform specific RB (RB for transmitting data). For the accurate channel measurement, or the CSI measurement by using the UE-specific pilot port virtualization mode, the DL Grant of the sub-mode 1 of the mode 1 can be selected to carry the CSI-RS pilot parameter configuration information. Configure higher density and support pre-coded CSI-RS, which can improve the accuracy of CSI-RS and improve the performance of edge users. This method is generally not used by all UEs, and is only used by users with strong feedback capability, channel correlation, and selective fading.

Case c1: The user who currently needs to perform CSI-RS measurement, and at the same time, the uplink PUSCH needs to be scheduled, and since the channel measurement has been performed through the shared CSI-RS resource before, it is desirable to perform more accurate channel measurement for the specific RB. Then, the UL Grant of the sub-mode 2 of the mode 1 can be selected to carry the CSI-RS pilot parameter configuration information.

Case d1: Users who need to perform CSI-RS measurement at present, no uplink PUSCH needs scheduling or downlink DL Grant to be scheduled, and the UE has very high flexibility for channel measurement, such as measuring various virtualization modes (level Virtualization, vertical virtualization), precoding/non-precoding type, channel information in the case of different port numbers, then the proprietary CSI-RS configuration DCI format of sub-mode 3 of mode 1 can be selected to carry CSI-RS The pilot parameter configuration information ensures sufficient flexibility, but this method is generally only available if the total control signaling overhead allows (the number of UEs is small).

When notifying the Zero Power CSI-RS trigger, select only one of the notifications (Mode 1 or Mode 2):

Case a2: The Zero Power CSI-RS is a large bandwidth or a full bandwidth. More UEs need to know the Zero power CSI-RS information to accurately perform rate matching. In order to avoid excessive overhead caused by excessive UE specific signaling, Generally, the resource location information of the Zero Power CSI-RS is notified by way of CSS.

Case b2: Zero Power CSI-RS is small bandwidth or partial bandwidth. Generally, when two users perform MU-MIMO, one user sends CSI-RS on the RB occupied by the data channel, then another user needs to pass Mode 2 of the USS notifies the presence of the Zero Power CSI-RS on the RB corresponding to the PDSCH.

Only one of the notifications (method 1 or mode 2) is selected when notifying the IMR trigger:

Case a3: More users use the same resource location for interference measurement. In this case, one way to save signaling overhead is to use CSS mode 1 for notification.

Case b3: In some cases, the terminal only needs to perform interference measurement on the RB where the downlink PDSCH is located to improve the interference measurement accuracy of the data channel, or only a small number of UEs need to perform interference measurement, then the appropriate selection is performed by the USS mode 2 Notice.

When the CSI-RS is triggered to trigger, two of the modes (method 1 and mode 2) are jointly notified:

Case e1: The base station uses the mode 1 CSS to notify the CSI-RS resource location corresponding to multiple sets of CSI-RSs in the current subframe or the specified subframe, the number of ports, density and the like of each set of CSI-RS.

The base station preferably adopts mode 2 to notify the CSI-RS of the selection information in the USS, such as selecting which set or sets of CSI-RSs to use for measurement, selecting which ports to use for resources, and the like.

Case f1: The base station uses the mode 1 CSS to notify the common parameters of the current subframe or all CSI-RSs in the specified subframe, such as the RB location, or the resource location Pattern information.

Preferably, the base station 2 uses the USS to notify the UE of some other possible non-common parameters, such as the number of ports, density, and the like of the CSI-RS.

Example 2:

In order to reduce the complexity of the terminal detection, the base station may configure the signaling manner of the CSI-RS parameter or the signaling manner of the Zero Power CSI-RS parameter or the signaling manner of the IMR parameter by using the high layer control signaling, for example:

The base station informs the UE whether it is the proprietary control signaling or the public control signaling mode by using 1 bit. The sub-mode supported by the proprietary control signaling can be pre-agreed as the sub-mode 1 of the mode 1, as shown in Table 2:

Table 2

Bit状态位Bit status bit	含义meaning
Bit状态位Bit status bit	含义meaning	00	CSS方式 CSS mode
11	USS方式子方式1USS mode sub mode 1	00	CSS方式 CSS mode

Or the base station notifies the UE whether it is a proprietary control signaling or a public control signaling manner by using a bit. The sub-mode supported by the proprietary control signaling may be pre-agreed as the sub-mode 2 of the mode 1, as shown in Table 3:

table 3

Bit状态位Bit status bit	含义meaning
Bit状态位Bit status bit	含义meaning	00	CSS方式 CSS mode
11	USS方式子方式2USS mode sub mode 2	00	CSS方式 CSS mode

Or the base station informs the UE whether it is the proprietary control signaling or the public control signaling mode by using 1 bit. The sub-mode supported by the proprietary control signaling may be pre-agreed as the sub-mode 3 of the mode 1, as shown in Table 4:

Table 4

Bit状态位Bit status bit	含义meaning
Bit状态位Bit status bit	含义meaning	00	CSS方式 CSS mode
11	USS方式子方式3USS mode sub mode 3	00	CSS方式 CSS mode

Or the base station notifies the UE whether it is the proprietary control signaling or the public control signaling mode by using 1 bit, and the sub-mode supported by the proprietary control signaling may be pre-agreed as the

sub-modes

1 and 2 of the mode 1, as shown in Table 5:

table 5

Bit状态位Bit status bit	含义meaning
Bit状态位Bit status bit	含义meaning	00	CSS方式 CSS mode
11	USS方式子方式1或2USS mode sub mode 1 or 2	00	CSS方式 CSS mode

sub-modes

1 and 3 of the mode 1, as shown in Table 6:

Table 6

Bit状态位Bit status bit	含义meaning
Bit状态位Bit status bit	含义meaning	00	CSS方式 CSS mode
11	USS方式子方式1或3USS mode sub mode 1 or 3	00	CSS方式 CSS mode

Or the base station informs the UE whether it is the proprietary control signaling or the public control signaling mode by using 1 bit, and the sub-mode supported by the proprietary control signaling may be pre-agreed as the

sub-modes

2 and 3 of the mode 1, as shown in Table 7:

Table 7

Bit状态位Bit status bit	含义meaning
Bit状态位Bit status bit	含义meaning	00	CSS方式 CSS mode
11	USS方式子方式2或3USS mode sub mode 2 or 3	00	CSS方式 CSS mode

Or the base station notifies the UE whether it is proprietary control signaling or public control signaling mode or proprietary control signaling and shared control signaling through 2 bits, as shown in Table 8:

Table 8

Bit状态位Bit status bit	含义meaning
Bit状态位Bit status bit	含义meaning	00	CSS方式or USS方式CSS mode or USS mode
11	CSS方式+USS方式CSS mode + USS mode	00	CSS方式or USS方式CSS mode or USS mode

Example 3:

This embodiment is used to describe how the terminal selects an appropriate mode to detect the CSI-RS pilot configuration parameters. The terminal prefers to understand that the current base station may configure CSI-RS or Zero-Power CSI-RS or IMR parameter information. The way you use it. One case is to agree which one or which type to use, and the other is to obtain the relevant notification mode by configuring signaling, and know which one or which way the base station may use to configure the above parameters.

If the terminal supports the DL Grant mode to configure the foregoing information, the terminal obtains the corresponding CSI-RS or Zero-Power CSI-RS or IMR parameters in the DL Grant by using a pre-defined bit bit indication.

If the terminal supports the UL Grant mode to configure the foregoing information, the terminal obtains the corresponding CSI-RS or Zero-Power CSI-RS or IMR parameters in the UL Grant through a pre-defined bit bit indication.

If the terminal supports the above-mentioned information in the proprietary DCI Format mode, the terminal obtains the corresponding CSI-RS or Zero-Power CSI-RS or IMR parameters in the proprietary DCI Format.

If the terminal supports the CSS mode to configure the above information, the terminal detects the corresponding DCI Format in the CSS, such as Format 1C, and finds the corresponding CSI-RS or Zero-Power CSI-RS or IMR parameter indication information in a pre-defined bit. .

For the above case, there may be multiple ways to coexist to notify multiple sets of CSI-RS or Zero-Power CSI-RS or IMR parameters, which may be independent of each other.

If the terminal supports the CSS and USS joint configuration mode to configure the above information, the terminal may first detect the CSS to obtain partial CSI-RS or Zero-Power CSI-RS or IMR parameter information, and then detect and obtain another in the USS. A portion of CSI-RS or Zero-Power CSI-RS or IMR parameter information. The two pieces of information together determine the corresponding CSI-RS or Zero-Power CSI-RS or IMR.

Example 4:

The base station selects a transmission mode of the public control signaling, and sends configuration information of the CSI-RS parameter in the corresponding resource in the CSS.

For example: DCI Format 1C [36.212] is an original DCI Format sent in CSS to indicate some public control information. The control signaling has some reserved fields that can be used to carry parameter configuration information of the aperiodic CSI-RS.

When the aperiodic CSI-RS pilot information is configured by using the method, in order to rationalize the overhead of the physical layer signaling resource, the CSI-RS pilot parameters may be jointly configured with the high layer RRC signaling.

For example, the pilot parameters to be configured include but are not limited to:

Downlink measurement of the transmission resource density of the pilot signal, including the density of the RB and the density of the RE within the RB;

The downlink measurement pilot signal transmission resource location, including time domain and frequency domain location indication information;

The number of transmission resource ports of the downlink measurement pilot signal;

Downlink measurement pilot signal transmission power;

Downlink measurement pilot signal sequence initialization parameters;

Downlink measurement pilot port virtualization mode indication;

The indication of the number of transmission repetitions of the downlink measurement pilot.

Since the RRC signaling has a semi-static characteristic, the physical layer signaling has dynamic characteristics, and the parameter information matching the dynamic/semi-static characteristics can be separately notified.

Preferably, the RRC signaling can be notified:

Downlink measurement pilot signal transmission power;

Downlink measurement pilot port virtualization mode indication;

Signaling at the physical layer;

An indication of the number of transmission repetitions of the downlink measurement pilot;

The number of transmission resource ports and port selection information of the downlink measurement pilot signal.

The sending resource location may be a subset of resources pre-configured based on RRC signaling to preferably indicate a subset thereof:

For example, a pre-configured resource set is R, and the R may be a transmit resource corresponding to a set of periodic CSI-RS, including subframe position information, period information, and the like.

FIG. 13 is a schematic diagram of R resource configuration according to an embodiment of the present invention. For a period of 10 milliseconds (ms), 8 ports, the configuration of the RE pattern 0 in the RB. Adopt RRC signaling configuration.

For this existing R resource, the base station only needs to indicate the location information of the aperiodic CSI-RS in the physical layer signaling:

For example, the frequency domain location can be carried in 3 bits, as shown in Table 9 (where mod is the remainder operator):

Table 9

Bit位状态Bit status	含义meaning
Bit位状态Bit status	含义meaning	000000	全带宽 Full bandwidth
001001	RB索引mod 4＝0 RB index mod 4=0	000000	全带宽 Full bandwidth
001001	RB索引mod 4＝0 RB index mod 4=0	010010	RB索引mod 4＝2 RB index mod 4=2
011011	前1/4RB First 1/4 RB	010010	RB索引mod 4＝2 RB index mod 4=2
011011	前1/4RB First 1/4 RB	100100	后1/4RB1/4 RB
101101	前1/2RB Top 1/2 RB	100100	后1/4RB1/4 RB
101101	前1/2RB Top 1/2 RB	110110	后1/2RBAfter 1/2 RB
111111	RB索引mod 2＝1 RB index mod 2=1	110110	后1/2RBAfter 1/2 RB

The time domain location is determined according to the transmission location of the current parameter configuration signaling. For example, if the subframe in which the configuration parameter is currently sent is the Mth subframe, the specified time domain location is the M resource in the R resource or the M resource after the M subframe. The most recent subframe in it. Therefore, the time domain location does not need to be notified with an explicit signaling bit.

The configuration resource of R is 1, 11, 21, 31... subframe. If M is 5, the triggered CSI-RS should be sent on the 11th subframe. If M is 11, then it should be on the 11th subframe. The triggered CSI-RS is sent. If M is 12, the triggered CSI-RS should be sent on the 21st subframe.

Port selection: Includes port number and port identification (ID).

One way is to notify only the number of ports, and pre-agreed the port ID information corresponding to each port number, as shown in Table 10:

Table 10

端口数目知Bit状态位Number of ports know Bit status bit	含义meaning
端口数目知Bit状态位Number of ports know Bit status bit	含义meaning	0000	1端口1 port
0101	2端口2 ports	0000	1端口1 port
0101	2端口2 ports	1010	4端口4 ports
1111	8端口8 ports	1010	4端口4 ports

In this embodiment, since the maximum of 8 ports is configured in the R resource, the bit state is parsed according to the configuration of the R resource, and the maximum is 8 ports.

If more than 8 ports are configured in the R resource, the other bit costs and the status of the bit bit can be used. For example, the maximum number of R ports is 64, as shown in Table 11:

Table 11

端口数目知Bit状态位Number of ports know Bit status bit	含义meaning
端口数目知Bit状态位Number of ports know Bit status bit	含义meaning	000000	1端口1 port
001001	2端口2 ports	000000	1端口1 port
001001	2端口2 ports	010010	4端口4 ports
011011	8端口8 ports	010010	4端口4 ports
011011	8端口8 ports	100100	16端口16 port
101101	32端口32 port	100100	16端口16 port
101101	32端口32 port	110110	64端口64 port
111111	保留位Reserved bit	110110	64端口64 port

Another way is to preferably notify the port selection information on the basis of notifying the number of ports.

For example, the total number of ports in R is 8, which are ports 15, 16, 17, 18, 19, 20, 21, and 22, and the number of port notifications notified in the physical layer control signaling is 2, so the corresponding ID can be notified. Several options are shown in Table 12:

Table 12

2端口选择Bit位状态2 port selection Bit status	含义meaning
2端口选择Bit位状态2 port selection Bit status	含义meaning	0000	15，1615,16
0101	17，1817,18	0000	15，1615,16
0101	17，1817,18	1010	19，2019,20
1111	21，2221,22	1010	19，2019,20

Example 5:

The base station selects the transmission mode of the proprietary control signaling, and sends the configuration information of the CSI-RS parameter in the corresponding resource in the USS.

For example, DCI Format 0/DCI Format 0 [36.212] is the original DCI Format sent in the USS for uplink PUSCH scheduling. The control signaling may add some parameter configuration information for carrying the aperiodic CSI-RS. After adding the parameter configuration information of the aperiodic CSI-RS, the DCI Format can continue to use the original name or use the new name, but all belong to the UL Grant category.

When the aperiodic CSI-RS pilot information is configured by this method, it is a proprietary control signaling. When the number of users is large, a large amount of control signaling overhead is occupied. In order to rationalize the overhead of the physical layer signaling resources, The RRC signaling is combined to jointly configure CSI-RS pilot parameters.

Downlink measurement pilot signal transmission power;

Downlink measurement pilot signal sequence initialization parameters;

Downlink measurement pilot port virtualization mode indication;

Preferably, the RRC signaling can be notified:

Downlink measurement pilot signal transmission power;

Downlink measurement pilot port virtualization mode indication;

The number of transmission resource ports and port selection information of the downlink measurement pilot signal;

Signaling at the physical layer;

Compared with the embodiment 1, when the aperiodic CSI-RS pilot parameter information is configured by the UL Grant, the information carried is less than that configured by the CSS, mainly from the perspective of overhead.

Example 6

For example, a new DCI Format is added for aperiodic CSI-RS pilot parameter configuration.

Considering the complementation with other notification methods, the signaling can be designed as a very flexible notification method, carrying more information in the physical layer control signaling, which may not be used frequently, but for some flexibility requirements A very high UE type can support very flexible measurement needs.

Downlink measurement pilot signal transmission power;

Downlink measurement pilot signal sequence initialization parameters;

Downlink measurement pilot port virtualization mode indication;

Preferably, the physical layer can be signaled:

Downlink measurement pilot signal transmission power;

Downlink measurement pilot port virtualization mode indication;

Compared with the first embodiment, when the aperiodic CSI-RS pilot parameter information is configured by using the new DCI Format, the information carried is more than the CSS configuration, and the aperiodic CSI-RS is configured more than the DL/UL Grant. The way the pilot parameters are.

Example 7

For example, DCI Format 2C/DCI Format 2D [36.212] is the original DCI Format sent in the USS for downlink PDSCH scheduling. The control signaling may add some parameter configuration information for carrying the aperiodic CSI-RS. After adding the parameter configuration information of the aperiodic CSI-RS, the DCI Format can continue to use the original name or use the new name, but all belong to the category of DL Grant.

When the aperiodic CSI-RS pilot information is configured by this method, it is a proprietary control signaling. When the number of users is large, a large amount of control signaling overhead is occupied. To rationalize the overhead of the physical layer signaling resources, The transmission/RB position of the appointment/configuration CSI-RS is determined according to the transmission RB position of the PDSCH.

For example, a simple convention is that the transmitting RB location of the CSI-RS is the same as the transmitting RB location of the PDSCH. In this way, the individual CSI-RS frequency domain location notification signaling can be reduced, and the control signaling overhead is reduced. At the same time, the delay of this method is small, and the CSI-RS and its corresponding configuration signaling are transmitted in the same subframe, and performance loss is not caused due to time-varying channel.

It is also possible to agree that the transmission RB position of the CSI-RS is an RB whose index is an odd/even number in the transmission RB of the PDSCH. Or, some of the above-mentioned conventions are indicated by the high-level signaling configuration, and the UE is informed of the manner of the appointment.

In addition to reducing the location notification information, the method can also be combined with the high layer RRC signaling to jointly configure the CSI-RS pilot parameters. It is preferable to reduce the overhead.

Downlink measurement pilot signal transmission power;

Downlink measurement pilot signal sequence initialization parameters;

Downlink measurement pilot port virtualization mode indication;

The precoding/non-precoding type indication of the downlink measurement pilot.

Preferably, the RRC signaling can be notified:

Downlink measurement pilot port virtualization mode indication;

Downlink measurement pilot signal transmission power;

Downlink measurement pilot signal sequence initialization parameters.

Signaling at the physical layer:

Downlink measurement of the transmission resource density of the pilot signal, such as the density of the RE within the RB;

The precoding/non-precoding type indication of the downlink measurement pilot.

For example, as shown in Table 13, the density information is notified by 2 bit information:

Table 13

密度指示Bit位状态Density indicates the bit status	含义meaning
密度指示Bit位状态Density indicates the bit status	含义meaning	0000	1RE/RB1RE/RB
0101	2RE/RB2RE/RB	0000	1RE/RB1RE/RB
0101	2RE/RB2RE/RB	1010	4RE/RB4RE/RB
1111	保留Reserved	1010	4RE/RB4RE/RB

For example, as shown in Table 14, the precoding/non-precoding type indication is notified by 1 bit information:

Table 14

Compared with the embodiment 1, when the aperiodic CSI-RS pilot parameter information is configured through the DL Grant, the information carried is less than that configured by the CSS, mainly from the perspective of overhead.

Example 8

In order to reduce the complexity of terminal detection, the base station can configure the signaling manner of the CSI-RS through high-level control signaling, for example:

The base station notifies the UE whether it is proprietary control signaling or public control signaling through 2 bits, and the specific sub-mode of the mode 1, as shown in Table 15, Table 16, and Table 17:

Table 15

or,

Table 16

or,

Table 17

通知方式指示Bit位状态Notification mode indicates Bit status	含义meaning
通知方式指示Bit位状态Notification mode indicates Bit status	含义meaning	0000	公有控制信令方式+专有控制信令方式共同通知Public control signaling method + proprietary control signaling method
0101	公有控制信令方式Public control signaling	0000
0101	公有控制信令方式Public control signaling	1010	专有控制信令Proprietary control signaling
1111	AllAll	1010	专有控制信令Proprietary control signaling

Industrial Applicability According to the foregoing description of the embodiments of the present invention, the present invention solves the problem of large signaling overhead in the related art and reduces signaling overhead.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A configuration information notification method includes:

Selecting a notification manner for notifying the terminal of the configuration information of the parameter, where the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter, where the notification manner includes: Transmitting configuration information of the parameter in a resource corresponding to the private search space USS; and/or transmitting configuration information of the parameter in a resource corresponding to the public search space CSS;

The terminal is notified by the selected notification manner.
The method according to claim 1, wherein after selecting a notification manner for notifying the terminal of the configuration information of the parameter, the method further includes:

Notifying the terminal of the selected notification manner by high layer signaling.
The method of claim 1, wherein the transmitting the configuration information of the parameter in the resource corresponding to the USS comprises at least one of the following:

Using the downlink scheduling information to transmit configuration information of the parameter in the downlink grant DL Grant;

Using the uplink scheduling information to transmit configuration information of the parameter in an uplink grant UL Grant;

The configuration information of the parameter is transmitted by using a proprietary downlink control information format DCI format.
The method according to claim 3, wherein when the configuration information of the parameter is transmitted by using the downlink scheduling information in the DL Grant, the configuration information of the parameter and the downlink scheduling information are in the same DCI format. In the middle transmission, determining, according to the location of the resource block occupied by the downlink data sharing channel used for sending data to the terminal, the pilot corresponding to the channel measurement pilot parameter, and the zero power measurement pilot parameter a resource block location of at least one of a pilot, the interference measurement resource parameter corresponding to the interference measurement resource.
The method according to claim 4, wherein the pilot corresponding to the channel measurement pilot parameter and the zero power measurement pilot parameter are determined according to the location of the resource block occupied by the downlink data sharing channel. The resource block location of at least one of the pilot and the interference measurement resource corresponding to the interference measurement resource parameter includes:

a resource block location and a location of at least one of a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter The location of the resource blocks occupied by the downlink data sharing channel is the same; and/or,

a resource block position for transmitting at least one of a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter A subset of the locations of resource blocks occupied by the downlink data sharing channel.
The method according to claim 1, wherein the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero power measurement pilot parameter, and the interference are selected in a resource corresponding to the CSS. And transmitting at least one of the interference measurement resources corresponding to the resource parameter, the pilot corresponding to the channel measurement pilot parameter, and the zero power measurement pilot parameter corresponding to the part or all resource blocks of the pre-configured resource set At least one of a pilot, the interference measurement resource parameter corresponding to the interference measurement resource parameter.
The method according to claim 3, wherein when the uplink scheduling information is used in the UL Grant, the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero power measurement pilot parameter, and the pilot are used. Transmitting the pilot corresponding to the channel measurement pilot parameter and the zero power measurement pilot parameter on part or all of the resource blocks of the pre-configured resource set when at least one of the interference measurement resources corresponding to the interference measurement resource parameter is described Corresponding pilot, at least one of interference measurement resources corresponding to the interference measurement resource parameter.
The method according to claim 3, wherein when the pilot corresponding to the channel measurement pilot parameter is transmitted by using the DCI format, the pilot corresponding to the zero power measurement pilot parameter, and the interference measurement resource parameter are used. Transmitting, according to at least one of the corresponding interference measurement resources, a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, or a pilot, on a part or all of the resource blocks of the pre-configured resource set, At least one of the interference measurement resources corresponding to the interference measurement resource parameter.
The method according to any one of claims 6 to 8, wherein the pre-configured resource set comprises a pilot corresponding to the channel measurement pilot parameter, and a pilot corresponding to the zero power measurement pilot parameter And configuring high-level configuration signaling of at least one of the interference measurement resources corresponding to the interference measurement resource parameter.
The method according to claim 3, wherein when the parameter includes the channel measurement pilot parameter, when the configuration information of the parameter is transmitted by using the uplink scheduling information in the UL Grant, the channel The number of bits of the configuration information of the measurement pilot parameter is smaller than the number of bits of the configuration information of the channel measurement pilot parameter when the configuration information of the parameter is transmitted in the resource corresponding to the CSS.
The method according to claim 1, wherein when the parameter includes the channel measurement pilot parameter and the configuration information of the parameter is sent in a resource corresponding to the USS, The resource block occupied by the downlink data sharing channel of the data transmission transmits a channel measurement pilot corresponding to the channel measurement pilot parameter.
The method of claim 11 wherein the channel measurement pilots comprise precoded measurement pilots and/or non-precoded measurement pilots.
The method according to claim 12, wherein when the channel measurement pilot comprises the precoding measurement pilot and/or the non-precoding measurement pilot, carrying in the physical layer configuration signaling is used for indicating The channel measures indication information of a type of pilot.
The method of claim 1, wherein when the parameter includes the channel measurement pilot parameter and transmitting configuration information of the parameter in a resource corresponding to the CSS, utilizing a subset of the pre-configured resource set A channel measurement pilot corresponding to the channel measurement pilot parameter is transmitted.
The method of claim 1, wherein the transmitting the configuration information of the parameter by using the resource corresponding to the USS and the resource corresponding to the CSS comprises at least one of the following:

Transmitting, by the CSS, configuration information of the parameter in a current or specified transmission time interval TTI to the terminal; using the USS to further configure the USS according to the information notified by the CSS to the terminal The configuration information of the parameter corresponding to the terminal is sent to the terminal;

The configuration information of the parameter is sent by using the resource corresponding to the USS, and the configuration information of the remaining part is sent by using the resource corresponding to the CSS.
A method for obtaining configuration information, including:

Receiving the selection information of the notification manner of the configuration information of the parameter notified by the base station, where the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter, where the notification manner includes: The base station sends configuration information of the parameter in a resource corresponding to the dedicated search space USS; and/or, the base station sends configuration information of the parameter in a resource corresponding to the public search space CSS;

Obtaining configuration information of the parameter according to the selection information.
The method according to claim 16, wherein the selection information of the notification manner of receiving the configuration information of the parameter notified by the base station comprises:

The selection information is received by high layer signaling of the base station.
The method according to claim 16, wherein the transmitting, by the base station, configuration information of the parameter in a resource corresponding to the USS includes at least one of the following:

Using the downlink scheduling information to transmit configuration information of the parameter in the downlink grant DL Grant;

Using the uplink scheduling information to transmit configuration information of the parameter in an uplink grant UL Grant;

The configuration information of the parameter is transmitted by using a proprietary downlink control information format DCI format.
The method according to claim 18, wherein when the base station transmits the configuration information of the parameter by using the downlink scheduling information in the DL Grant, according to the physical downlink shared channel PDSCH indicated in the downlink scheduling information, The resource block location determines a resource for transmitting at least one of a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter The location of the block.
The method according to claim 19, wherein the pilot, the zero power corresponding to the channel measurement pilot parameter is determined according to a resource block location dedicated to the physical downlink shared channel (PDSCH) indicated in the downlink scheduling information. The location of the resource block corresponding to the pilot corresponding to the pilot parameter and the interference measurement resource corresponding to the interference measurement resource parameter includes:

And a position of a resource block for transmitting at least one of a pilot corresponding to the channel measurement pilot parameter, a pilot corresponding to the zero power measurement pilot parameter, and an interference measurement resource corresponding to the interference measurement resource parameter The resource blocks occupied by the PDSCH are in the same location; and/or,

And a position of the resource block used for transmitting the pilot corresponding to the channel measurement pilot parameter, the pilot corresponding to the zero power measurement pilot parameter, and the interference measurement resource corresponding to the interference measurement resource parameter is A subset of resource block locations occupied by the PDSCH.
The method according to claim 16, wherein when the base station sends the configuration information of the parameter in the resource corresponding to the USS and the resource corresponding to the CSS, the configuration of the parameter is acquired according to the selection information. Information includes:

Detecting configuration information of the parameter sent by the resource corresponding to the USS and configuration information of the parameter sent by the resource corresponding to the CSS;

Obtaining configuration information of the parameter according to the detection result.
A configuration information notification device includes:

a selection module, configured to select a notification manner for notifying the terminal of the configuration information of the parameter, where the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter, The notification manner includes: transmitting configuration information of the parameter in a resource corresponding to the dedicated search space USS; and/or transmitting configuration information of the parameter in a resource corresponding to the public search space CSS;

The first notification module is configured to notify the terminal by using the selected notification manner.
The apparatus of claim 22, further comprising:

The second notification module is configured to notify the terminal of the selected notification manner by high layer signaling.
A base station comprising the apparatus of any one of claims 22 to 23.
A configuration information acquiring device includes:

The receiving module is configured to receive the selection information of the notification manner of the configuration information of the parameter notified by the base station, where the parameter includes at least one of the following: a channel measurement pilot parameter, a zero power measurement pilot parameter, and an interference measurement resource parameter. The notification manner includes: the base station transmitting the configuration information of the parameter in a resource corresponding to the dedicated search space USS; and/or, the base station sending the configuration information of the parameter in a resource corresponding to the public search space CSS;

And an obtaining module, configured to acquire configuration information of the parameter according to the selection information.
The apparatus of claim 25, wherein the receiving module comprises:

The selection information is received by high layer signaling of the base station.
The apparatus according to claim 25, wherein when the base station sends configuration information of the parameter in a resource corresponding to the USS and a resource corresponding to the CSS, the acquiring module includes:

a detecting unit, configured to detect configuration information of the parameter sent in a resource corresponding to the USS, and configuration information of the parameter sent in a resource corresponding to the CSS;

The obtaining unit is configured to acquire configuration information of the parameter according to the detection result.
A terminal comprising the apparatus of any one of claims 25 to 27.