CN107404370B

CN107404370B - Reference signal configuration method and device

Info

Publication number: CN107404370B
Application number: CN201610334784.0A
Authority: CN
Inventors: 栗忠峰; 吴宁; 李新县
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-05-18
Filing date: 2016-05-18
Publication date: 2021-02-12
Anticipated expiration: 2036-05-18
Also published as: WO2017198120A1; CN107404370A

Abstract

The embodiment of the invention provides a reference signal configuration method and a reference signal configuration device. The reference signal configuration method comprises the following steps: dividing RS into m configurations, wherein m is a positive integer; determining the positions of resource elements occupied by the m configured reference signals, wherein the resource elements occupied by the m configured reference signals are located in different time domain and/or frequency domain positions, so that the number of resource elements occupied by the RS of other services on an OFDM symbol possibly occupied by the URLLC service is reduced, and resources used for data transmission in the URLLC service are ensured; and the difference of resource elements occupied by the RS of other services in time domain and/or frequency domain positions is also reduced, and the scheduling of the URLLC service is simplified.

Description

Reference signal configuration method and device

Technical Field

The present invention relates to communications technologies, and in particular, to a method and an apparatus for configuring a reference signal.

Background

With the development of Communication technology, services provided by the Communication technology are more and more diversified, for example, Ultra Reliable Low Latency Communication (URLLC) service, enhanced Mobile Broadband (eMBB) service, and the like. The URLLC Service is a bursty packet Service, and its Quality of Service (QoS) requirement is ultra-high reliability and short-time ductility.

When Reference Signal (RS) of other services such as eMBB service exists on a symbol where the URLLC service is located, in order to ensure demodulation performance of the other services, the URLLC service can only be transmitted on non-RS Resource elements occupied by the other services, for example, Resource Elements (RE) in the LTE system.

Although the scheme ensures the low delay of the URLLC service, resources used for data transmission in the URLLC service are reduced, so that the code rate of the URLLC service is improved, and further the reliability of the URLLC service is reduced, or the URLLC service is reduced, the transmission of part of the URLLC service is delayed, and the characteristic of low delay cannot be ensured.

Disclosure of Invention

Embodiments of the present invention provide a method and an apparatus for configuring a reference signal, so as to ensure a low delay of a URLLC service, and simultaneously, compared with the prior art, ensure resources used for data transmission in the URLLC service, improve reliability of the URLLC service, or avoid delaying transmission of a part of the URLLC service due to a reduction in the size of the URLLC service, and ensure a low delay characteristic of the delayed part of the URLLC service.

In a first aspect, an embodiment of the present invention provides a reference signal configuration method, including: dividing RS into m configurations, wherein m is a positive integer; determining the positions of resource elements occupied by the m configured reference signals; wherein, the resource elements occupied by the m configured reference signals are located at different time domain and/or frequency domain positions.

The embodiment of the invention divides the RS of other services except URLLC service into m configurations, and when the positions of the resource elements occupied by the m configured reference signals are determined, the resource elements occupied by the m configured reference signals are positioned at different time domain and/or frequency domain positions, so that the RSs of other services are uniformly distributed at different time domain and/or frequency domain positions, compared with the existing reference signal configuration method, the number of the resource elements occupied by the RSs of other services on the OFDM symbol possibly occupied by the URLLC service is reduced, and the resource for data transmission in the URLLC service is ensured; in addition, the difference of resource elements occupied by the RSs of other services in time domain and/or frequency domain positions is also lightened, all the resource elements in one RB are available from the perspective of the URLLC service, and whether the URLLC service occupies the resource elements occupied by the RSs of other services is not required to be considered in the embodiment of the invention, so that the scheduling of the URLLC service is simplified.

In a first possible implementation manner of the first aspect, the positioning, at different time domain and/or frequency domain positions, of resource elements occupied by the m configured reference signals includes: in any one of the m configurations, resource blocks occupied by the reference signals are continuous or discontinuous on a frequency domain; and/or when m is greater than 1, the reference signals are located in the same Orthogonal Frequency Division Multiplexing (OFDM) symbol or partially located in different OFDM symbols or completely located in different OFDM symbols in the time domain between two configurations of the m configurations.

In a second possible implementation manner of the first aspect, the OFDM symbols occupied by the reference signals are located in the same or different time units, where the time units are subframes or time slots or scheduling units or transmission time intervals.

In a third possible implementation manner of the first aspect, a time domain or a frequency domain position of a resource element occupied by the reference signal is predefined and determined by a system; or, the time domain or frequency domain position of the resource element occupied by the reference signal is configured through signaling.

In a fourth possible implementation manner of the first aspect, the position of the part or all of the resource elements occupied by the reference signal of at least one of the m configurations is a shift, a flip, or a rotation of the position of the resource elements occupied by the reference signal of the LTE system; or, when m is greater than 1, the position of the resource element occupied by the reference signal of one configuration in the m configurations is a shift, or a flip, or a rotation of the position of the resource element occupied by the reference signal of another configuration; or when m is greater than 1, the m configured reference signals are located in different time units, where the time units in which at least two configured reference signals in the m configured reference signals are located correspond to the same first control channel, the first control channel is located in the time unit in which the reference signal in the at least two configured reference signals that is one configured reference signal before in the time domain is located, and the at least two configured reference signals are located at different positions of the time unit. Wherein the shift may be any one or a combination of a time domain shift and a frequency domain shift.

In a fifth possible implementation manner of the first aspect, the reference signal is a CSIRS or a UE specific RS.

In a sixth possible implementation manner of the first aspect, the execution subject of the method is a base station device. And exchanging the time-frequency resource information configured by the new reference signal between the base station devices.

In a second aspect, an embodiment of the present invention provides a reference signal configuration apparatus, including: the configuration module is used for dividing the RS into m configurations, wherein m is a positive integer; a processing module, configured to determine positions of resource elements occupied by the m configured reference signals; wherein, the resource elements occupied by the m configured reference signals are located at different time domain and/or frequency domain positions.

Based on the same inventive concept, as the principle of the device to solve the problem corresponds to the scheme in the method design of the first aspect, the implementation of the device can refer to the implementation of the method, and repeated details are not repeated.

Alternatively, the apparatus may be a base station device or integrated in a base station device. And exchanging the time-frequency resource information of the new RS configuration between the base station devices.

In a third aspect, an embodiment of the present invention provides a reference signal configuration apparatus, including: a processor and a memory for storing executable instructions. Wherein the processor is configured to execute executable instructions to perform the method according to any of the first aspect.

In a fourth aspect, embodiments of the present invention provide a non-transitory computer-readable storage medium storing one or more programs. The one or more programs include instructions, which when executed by the reference signal configuration apparatus, cause the reference signal configuration apparatus to perform the scheme in the method design of the first aspect, and repeated details are not repeated.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a network architecture of an LTE system provided in the present invention;

FIG. 2 is a flowchart illustrating a first embodiment of a reference signal configuration method according to the present invention;

fig. 3 shows a schematic distribution diagram of Resource elements occupied by an RS of an eMBB service in 2 Physical Resource Block (PRB) pairs in an existing LTE system;

fig. 4a and 4b are schematic diagrams illustrating distribution of resource elements occupied by each RS configuration of an eMBB service in an embodiment of the present invention;

fig. 5a and 5b are schematic diagrams illustrating distribution of resource elements occupied by each RS configuration of an eMBB service in another embodiment of the present invention;

fig. 6a and 6b are schematic diagrams illustrating distribution of resource elements occupied by each RS configuration of an eMBB service according to still another embodiment of the present invention;

fig. 7 is a schematic diagram illustrating a distribution of resource elements occupied by each RS configuration of an eMBB service according to another embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a distribution of resource elements occupied by each RS configuration of an eMBB service according to another embodiment of the present invention;

fig. 9 is a schematic diagram illustrating a distribution of resource elements occupied by each RS configuration of an eMBB service according to another embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a reference signal configuration apparatus according to a first embodiment of the present invention;

fig. 11 is a schematic structural diagram of a second reference signal configuration apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims of the embodiments of the invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical solution of the present invention can be applied to various communication systems of a wireless cellular network, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS) System, a Long Term Evolution (LTE) System and an Evolution System thereof, a Universal Mobile Telecommunications System (UMTS) System, a Wireless Fidelity (WiFi) System, and a World Interoperability for Microwave Access (max) System, and the like, but the present invention is not limited thereto.

The embodiment of the invention can be applied to the following scenes: URLLC traffic and other traffic coexist, e.g., URLLC traffic and eMBB traffic coexist. Fig. 1 is a schematic diagram of a network architecture of an LTE system provided in the present invention. As shown in fig. 1, the main network entities of the LTE system function as follows:

evolved universal terrestrial radio access network (E-UTRAN for short): a network composed of a plurality of evolved Node Base stations (eNB) realizes the functions of wireless physical layer, resource scheduling, wireless resource management, wireless access control and mobility management. The eNB is connected with a Serving Gateway (SGW) through a user interface S1-U and is used for transmitting user data; the method is characterized in that a control plane interface S1-MME is connected with a Mobility Management Entity (MME for short), and functions such as wireless access bearer control and the like are realized by adopting an S1-AP protocol.

MME: the method is mainly responsible for encrypting Non-Access Stratum (NAS) signaling and NAS signaling with UE, distributing temporary identity for user equipment, selecting core network elements such as SGW and PGW, and providing functions of roaming, tracking, safety and the like, and corresponds to a control plane part of a Serving GPRS Support Node (SGSN for short) in the current UMTS system.

SGW: the method is mainly responsible for data transmission, forwarding, route switching and the like of User Equipment (User Equipment, abbreviated as UE) and is used as a local mobility anchor point when the UE is switched between eNBs. For each user equipment, only one SGW serves it at a time.

PGW: the serving as an anchor point of Public Data Network (PDN) connection is responsible for Internet Protocol (IP) address allocation of the UE, Data packet filtering of the UE, rate control, generation of charging information, and the like.

Home Subscriber Server (HSS): the HSS is used to store subscription information of the user.

Policy Control Rule Function (Policy Control Rule Function, abbreviated as PCRF): policy and charging control rules are provided.

Non-3 GPP networks can be generally divided into trusted non-3 GPP networks and untrusted 3GPP networks, where trusted non-3 GPP networks are accessed through an S2a interface with a P-GW; the untrusted non-3 GPP network is accessed through an S2b interface between an evolved packet data gateway (evolved PDN, abbreviated as ePDN) and a PGW. The ePDN is responsible for forwarding or distributing the mobile local IP address of the UE, registering the local IP address of the UE and binding the mobile IP address of the UE with the local IP address. When accessing from the non-3 GPP network, another important network element is an Authentication, Authorization and Accounting (AAA) server, which realizes the Authentication and Authorization operation of the user equipment through the interaction with the HSS; and registering PGW identification information used by each PDN connection established by the UE into the HSS.

Of course, when the current non-3 GPP network accesses the core network of the 3GPP system, both the trusted non-3 GPP system and the untrusted non-3 GPP system may also access through the S2c interface between the UE and the PGW. Meanwhile, when the 3GPP system accesses, the UE may also establish a binding with the PGW through the S2c interface.

When the URLLC service and other services coexist, a phenomenon that a symbol in which the URLLC service is located partially or completely collides with a symbol occupied by an RS of the other services may occur. In order to solve the technical problem, embodiments of the present invention provide a reference signal configuration method and apparatus, so as to ensure a low delay of a URLLC service, and at the same time, compared with the above prior art, ensure resources used for data transmission in the URLLC service, improve reliability of the URLLC service, or avoid delaying transmission of a part of the URLLC service due to reducing the size of the URLLC service, and ensure a low delay characteristic of the delayed part of the URLLC service. The embodiment of the present invention is illustrated by taking an enhanced Mobile Broadband (eMBB) service as another service, but the other service is not limited to the eMBB service.

Fig. 2 is a flowchart of a reference signal configuration method according to a first embodiment of the present invention. The embodiment of the invention provides a reference signal configuration method, which can be executed by a reference signal configuration device, the device can be realized in a software and/or hardware mode, and the device can exist independently or be integrated in base station equipment. As shown in fig. 2, the reference signal configuration method includes:

s201, dividing the RS into m configurations, wherein m is a positive integer.

For example, the RS for the eMBB service over the full bandwidth is divided into m configurations. Wherein m can be any positive integer.

In particular, m may be 1. In this case, m is 1, which indicates that the RSs of the eMBB service are integrated.

The number of RBs occupied for each configured RS is not 0. Those skilled in the art may understand that the number of RBs occupied by the RS configured in each eMBB service may be the same or different, and the embodiment of the present invention does not limit the number of RBs.

S202, determining positions of resource elements occupied by the m configured reference signals, wherein the resource elements occupied by the m configured reference signals are located at different time domain and/or frequency domain positions.

The steps include the following cases:

determining the positions of resource elements occupied by m configured reference signals, wherein all or part of the resource elements occupied by the m configured reference signals are located at different time domain positions and the same frequency domain position;

determining the positions of resource elements occupied by m configured reference signals, wherein all or part of the resource elements occupied by the m configured reference signals are located at different frequency domain positions and the same time domain position;

and determining the positions of resource elements occupied by the m configured reference signals, wherein all or part of the resource elements occupied by the m configured reference signals are located at different time domain positions and different frequency domain positions.

Wherein the resource element is a minimum granularity of a physical layer resource. In the time domain, the resource elements correspond to 1 OFDM symbol; in the frequency domain, a resource element corresponds to 1 subcarrier.

For example, the resource elements occupied by the 1 st configured reference signal are located at the 1 st OFDM symbol and the 2 nd OFDM symbol in the time domain, the resource elements occupied by the 2 nd configured reference signal are located at the 4 th OFDM symbol and the 5 th OFDM symbol in the time domain, and so on.

For another example, in the resource elements occupied by the reference signal of the 1 st configuration, a part of the time domain is located at the 1 st OFDM symbol, another part of the time domain is located at the 2 nd OFDM symbol, and so on.

Similarly, resource elements occupied by m configured reference signals are located in the same or different subcarriers in the frequency domain, and a specific example may refer to an example in which the resource elements occupied by the reference signals in different configurations are located in the same or different OFDM symbols in the time domain.

The following describes, by a specific implementation manner, that the resource elements occupied by the m configured reference signals are located at different time domain and/or frequency domain positions.

In one implementation, the position of the resource element occupied by the reference signal of at least one of the m configurations is a shift, a flip, or a rotation of the position of the resource element occupied by the reference signal of the LTE system. The implementation mode shifts or overturns or rotates the resource elements occupied by the RS of the LTE system based on the positions of the resource elements occupied by part of or all of the bandwidths of the RS to obtain the position of the resource element occupied by the RS of at least one configuration of m configurations. Here, the part or all resource elements occupied by the RS of at least one configuration in the m configurations refers to all or part of the resource elements occupied by the RS of the one configuration, that is, all or part of the position of the resource elements occupied by the RS of the one configuration is obtained by shifting, flipping, or rotating the position of the resource elements occupied by part or all of the bandwidth of the RS of the LTE system.

The embodiment of the invention carries out up-and-down (frequency domain) shift, and/or left-and-right (time domain) shift, and/or turning or rotating on the position of the resource element occupied by the RS of the partial bandwidth or the whole bandwidth of the existing LTE system on the basis of the position of the resource element occupied by the RS of the partial bandwidth or the whole bandwidth of the existing LTE system, thereby obtaining the position distribution of the resource element occupied by the RS of other services except the URLLC service, such as the eMBB service.

For example, fig. 3 shows the resource element distribution occupied by the RS of the eMBB service in 2 PRB pairs in the existing LTE system. Referring to fig. 3, for a Normal Cyclic Prefix (Normal CP), under a 4-antenna port condition, resource elements of an RS of an eMBB service are distributed in 2 PRB pairs as shown in any shape in the figure, for example, there are 10 distribution indications of resource elements occupied by a Channel State Reference Signal (CSIRS) in 2 PRB pairs, such as a square including a circle, a square, an ellipse, a diamond, a dot, and the like; a distribution of resource elements occupied by a UE specific RS in 2 PRB pairs is indicated, for example, a square including a left oblique line; a distribution of resource elements occupied by a Physical Downlink Control Channel (PDCCH) in 2 PRB pairs is shown, for example, a square including a right oblique line; resource elements occupied by Common Reference Signals (CRS) in 2 PRB pairs have a distribution, such as a square box including squares; the other resource elements are used by a Physical Downlink Shared Channel (PDSCH) for carrying data from the transmission of the Downlink Shared Channel.

For example, shifting a square including a circle in fig. 3 up and down (frequency domain) and/or left and right (time domain) results in the resource element distribution occupied by an RS of one configuration of the eMBB service.

As illustrated in fig. 3, in the LTE system, RSs of the eMBB service are distributed differently in different OFDM symbols, and thus, the number of available resource elements for data transmission is different for each OFDM symbol.

In another implementation, when m is greater than 1, the position of the resource element occupied by the reference signal of one of the m configurations is a shift, or a flip, or a rotation of the position of the resource element occupied by the reference signal of another configuration. For example, when m is 2, the position of the resource element occupied by one configured RS is shifted or flipped or rotated to obtain the position of the resource element occupied by the other configured RS. The position of the resource element occupied by the RS of one configuration may be the same as or different from the position of the resource element occupied by the RS of the LTE system, and the embodiment of the present invention does not limit the position.

It should be noted that the shift may be any one or a combination of a time domain shift and a frequency domain shift. For rotation and flipping, those skilled in the art can understand that, if the time domain positions of the resource elements occupied by the RS in two configured RSs are the same, and the frequency domain positions are different, then for the concept of configuration, the position of the resource element occupied by one configured RS in the two configured RSs is the flipping or rotating of the position of the resource element occupied by the other configured RS. The flipping and rotating may be performed on a preset axis or a preset point, and the embodiment of the present invention is not limited thereto.

In yet another implementation, when m is greater than 1, the reference signals in the m configurations are located in different time units. The time units of at least two configured reference signals in the m configured reference signals correspond to the same first control channel, the first control channel is located in the time unit of the reference signal which is located in the time domain before the reference signal, and the at least two configured reference signals are located in different positions of the time unit.

On the basis of the above embodiment, in any configuration of m configurations, Resource Blocks (RBs) occupied by the RS are continuous or discontinuous in the frequency domain. The RB referred to herein as contiguous or non-contiguous in the frequency domain means: in an RB occupied by a configured RS, if two adjacent RBs are distributed with RSs, the two RBs are continuous on a frequency domain; if one of the two adjacent RBs has no RS distributed, the two RBs are not consecutive in the frequency domain.

In addition, in any one of the m configurations, the resource elements occupied by the RS are located in the same or different OFDM symbols in the time domain. For example, in the resource elements occupied by the RS of the eMBB service shown in fig. 3, after a square including a circle of the 6 th OFDM symbol from the left located in one RB is moved to the left by one OFDM symbol, the 5 th OFDM symbol from the left is located; after a square including a circle of the 7 th OFDM symbol from the left located in one RB is shifted to the right by one OFDM symbol, the 8 th OFDM symbol from the left, that is, the resource elements occupied by the RSs of the eMBB service in the same configuration are located in different OFDM symbols in the time domain. For another example, in the resource elements occupied by the RS of the eMBB service shown in fig. 3, after a square including a circle of the 6 th OFDM symbol from the left and located in one RB is moved up by one subcarrier, the square is also located in the 6 th OFDM symbol from the left; after a square including a circle of the 7 th OFDM symbol from the left located in one RB is shifted to the left by one OFDM symbol, the 6 th OFDM symbol from the left is located, that is, resource elements occupied by RSs of the eMBB service in the same configuration are located in the same OFDM symbol in the time domain. It should be noted that the above examples are only for convenience of understanding, and the embodiments of the present invention are not limited thereto.

Optionally, when m is greater than 1, between two configurations of the m configurations, the RS is located in a same OFDM symbol or a part of different OFDM symbols or all of different OFDM symbols in the time domain. For specific explanation, reference may be made to the detailed description in the previous paragraph that resource elements occupied by RSs configuring the eMBB service are located in the same or different OFDM symbols in the time domain, which is not described herein again.

Further, the OFDM symbols occupied by the RS are located in the same or different time units, where the time units are subframes or time slots or scheduling units or transmission time intervals, etc. That is, the OFDM symbols occupied by the RS may be located in the same or different subframes; or, the OFDM symbols occupied by the RS may be located in the same or different slots; or, the OFDM symbols occupied by the RS may be located in the same or different scheduling units; or, the OFDM symbols occupied by the RSs may be located in the same or different transmission time intervals.

It should be noted that the time domain or frequency domain position of the resource element occupied by the RS may be configured in multiple ways: the method comprises the following steps of firstly, predefining and determining by a system; the second way, the configuration is performed through signaling, and the like.

Specifically, the execution subject of the present embodiment may be a base station apparatus. Generally, the base station device may pre-configure RS information of the eMBB service; or, the RS configuration may also be obtained by receiving a related signaling sent by a control layer (e.g., a higher layer network element device, a control plane device, etc.) during the operation process.

The RS mentioned in the embodiment of the invention is a CSIRS or a UE specific RS. These two RSs are specifically described below.

First, the embodiment of configuring CSIRS

In the present embodiment, 1 CSIRS is divided into an a configuration and a B configuration in the frequency domain. The resource elements occupied by the CSIRS configured by at least one of the two configured CSIRS are the same as the resource elements occupied by the partial bandwidth or the entire bandwidth of the CSIRS of any version of the communication standards LTE Rel10 to Rel13, or the time domain shift, the frequency domain shift, or the combination of the time domain shift and the frequency domain shift of the resource elements occupied by the partial bandwidth or the entire bandwidth of the CSIRS of any version of the LTE Rel10 to Rel13, or the combination of the time domain shift and the frequency domain shift of the resource elements occupied by the partial bandwidth or the entire bandwidth of the CSIRS of any version of the LTE Rel10 to Rel13 and the time domain shift and/or the frequency domain shift of the resource elements occupied by the partial bandwidth or the entire bandwidth of the CSIRS of any version of the LTE Rel10 to Rel 13. All configured CSIRS are located on different OFDM symbols or part of configured CSIRS are located on different OFDM symbols, the sum of bandwidths corresponding to the configured CSIRS is less than or equal to the system bandwidth, and RBs where the configured CSIRS is located may be continuous or discontinuous in the frequency domain.

Reference is made to fig. 4a, 4b, 5a, 5b, 6a and 6 b. In fig. 4a and 4B, the resource elements occupied by the CSIRS configured by a are the same as the resource elements occupied by part or all of the CSIRS bandwidth of the LTE system, the resource elements occupied by the CSIRS configured by B are the same as the resource elements occupied by part or all of the CSIRS bandwidth of the LTE system, and the CSIRS configured by a and B are all located in different OFDM symbols. In fig. 5a and 5B, the resource element occupied by the CSIRS configured by a is a frequency domain shift of the resource element occupied by the CSIRS of the LTE system in part of or all of its bandwidth, the resource element occupied by the CSIRS configured by B is a time domain shift of the resource element occupied by the CSIRS of the LTE system in part of or all of its bandwidth, and the CSIRS configured by a and B are all located in different OFDM symbols. In fig. 6a and fig. 6b, the resource elements occupied by the CSIRS configured by a are resource elements occupied by the CSIRS of the LTE system in part of or all of its bandwidth, and are combined with the time domain shift of the resource elements occupied by the CSIRS of the LTE system in part of or all of its bandwidth; the resource elements occupied by the CSIRS configured by the B are resource elements occupied by partial bandwidth or all bandwidth of the CSIRS of the LTE system, and are combined with the frequency domain shift of the resource elements occupied by partial bandwidth or all bandwidth of the CSIRS of the LTE system, and the CSIRS configured by the A and the B are all located in different OFDM symbols.

Second, configure the specific embodiment of UE specific RS

In this embodiment, 1 UE specific RS is divided into two configurations, i.e., an a configuration and a B configuration, in the frequency domain. The resource elements occupied by the UE Specific RS of each configuration are the same as the resource elements occupied by part of or all of the bandwidth of the UE Specific RS of any version of LTE Rel 10-Rel 13, or are the time-frequency shift, the frequency-domain shift, or the combination of the time-domain shift and the frequency-domain shift of the resource elements occupied by part of or all of the bandwidth of the UE Specific RS of any version of LTE Rel 10-Rel 13, or are the combination of the time-domain shift and/or the frequency-domain shift of the resource elements occupied by part of or all of the bandwidth of the UE Specific RS of any version of LTE Rel 10-Rel 13 and the resource elements occupied by part or all of the bandwidth of the UE Specific RS of any version of LTE Rel 10-Rel 13. In each configuration, resource elements occupied by the UE Specific RS are all located on different OFDM symbols or partially located on different OFDM symbols in the time domain, the sum of bandwidths corresponding to each configuration is less than or equal to the system bandwidth, and the RB on which the UE Specific RS is located in each configuration may be continuous or discontinuous in the frequency domain.

Referring to fig. 7 and 8, in fig. 7, a resource element occupied by the UE Specific RS configured in a is the same as a resource element occupied by a partial bandwidth or a whole bandwidth of the UE Specific RS of the LTE system, a resource element occupied by the UE Specific RS configured in B is a time domain shift of the resource element occupied by the partial bandwidth or the whole bandwidth of the UE Specific RS of the LTE system, and the UE Specific RSs configured in a and B are all located in different OFDM symbols; in fig. 8, the resource elements occupied by the UE Specific RS configured in a are the same as the resource elements occupied by part of or all of the bandwidth of the UE Specific RS of the LTE system, the resource elements occupied by the UE Specific RS configured in B are time domain shifts of the resource elements occupied by part or all of the bandwidth of the UE Specific RS of the LTE system, and the UE Specific RS configured in a and B are located in different OFDM symbols.

For a scene in which OFDM symbols occupied by RSs with different configurations are located in different time units, the following description takes the case in which OFDM symbols occupied by RSs with different configurations are located in different subframes as an example:

the embodiment of the invention provides a specific embodiment of dynamic UE specific RS configuration.

In the embodiment of the present invention, there are two configured UE specific RSs, as shown in fig. 9. Referring to fig. 9, subframe 1, subframe 2 and subframe 3 share a control channel, each subframe has a respective UE specific RS, and the OFDM symbol position occupied by the UE specific RS is close to the start position of the subframe; the UE specific RS in subframe 1 is configured as A, and the UE specific RSs in subframes 2 and 3 are configured as B. The OFDM symbols occupied by each configured UE specific RS are located in different subframes, the positions of reference signals configured by each configured UE specific RS in the subframes are different, and the resource blocks occupied by each configured UE specific RS are continuous or discontinuous in the frequency domain. In fig. 9, the resource element represented by the blank box is a Physical Uplink Shared Channel (PUSCH) or a PDSCH.

It should be noted that, in fig. 4a to fig. 8, specific meanings represented by resource elements with various shapes may refer to specific meanings represented by resource elements with the same shape shown in fig. 3, and are not repeated herein.

Optionally, the base station device interacts with new RS configured time-frequency resource information, that is, new RS configured time-frequency resource information may be interacted between different base station devices, so that reference signal interference between adjacent cells may be avoided.

Fig. 10 is a schematic structural diagram of a reference signal configuration apparatus according to a first embodiment of the invention. As shown in fig. 10, the reference signal configuration apparatus 90 includes a configuration module 91 and a processing module 92.

The configuration module 91 is configured to divide the RS into m configurations, where m is a positive integer.

A processing module 92, configured to determine positions of resource elements occupied by the m configured reference signals, where the resource elements occupied by the m configured reference signals are located in different time domain and/or frequency domain positions.

The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.

On the basis of the above embodiment, the resource elements occupied by the m configured reference signals are located at different time domain and/or frequency domain positions, including: in any one of the m configurations, the RBs occupied by the RS is continuous or discontinuous in the frequency domain; and/or, when m is greater than 1, between two configurations of the m configurations, the reference signals are located in the same OFDM symbol in the time domain or partially located in different OFDM symbols or completely located in different OFDM symbols.

Further, the OFDM symbols occupied by the RS are located in the same or different time units, where the time units are subframes or time slots or scheduling units or transmission time intervals, etc.

The time domain or frequency domain position of the resource element occupied by the RS is predefined and determined by a system; or, the time domain or frequency domain position of the resource element occupied by the RS is configured through signaling.

Exemplarily, the position of the part or all resource elements occupied by the reference signal of at least one of the m configurations is a shift, a flip, or a rotation of the position of the resource elements occupied by the reference signal of the LTE system; or, when m is greater than 1, the position of the resource element occupied by the reference signal of one of the m configurations is a shift, or a flip, or a rotation of the position of the resource element occupied by the reference signal of the other configuration; or when m is greater than 1, the m-configured reference signals are located in different time units, where the time units in which at least two configured reference signals in the m-configured reference signals are located correspond to the same first control channel, the first control channel is located in the time unit in which the one configured reference signal that is earlier in the time domain in the at least two configured reference signals is located, and the at least two configured reference signals are located at different positions of the time unit. The shift may be any one of or a combination of a time domain shift and a frequency domain shift.

The RS can be a CSIRS or a UE specific RS.

The reference signal configuration apparatus 90 may be embodied as a base station device or integrated in a base station device. And exchanging the time-frequency resource information of the new RS configuration between the base station devices.

Fig. 11 is a schematic structural diagram of a second reference signal configuration apparatus according to an embodiment of the present invention. As shown in fig. 11, the reference signal configuration apparatus 100 includes a processor 110 and a memory 120 for storing executable instructions. Wherein the processor 110 is configured to execute executable instructions to perform any of the methods described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units or modules is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or modules may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.

The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The aforementioned program may be stored in a non-volatile computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reference signal configuration method is characterized in that an execution main body of the method is base station equipment, and time frequency resource information configured by new reference signals is interacted between the base station equipment; the method comprises the following steps:

dividing a reference signal into m configurations, wherein m is a positive integer, and the reference signal is a reference signal of other services except for the URLLC service of the ultra-high-reliability low-delay communication;

determining the positions of resource elements occupied by the m configured reference signals;

wherein, the resource elements occupied by the m configured reference signals are located at different time domain and/or frequency domain positions;

the resource elements occupied by the m configured reference signals are located at different time domain and/or frequency domain positions, including:

in any one of the m configurations, resource blocks occupied by the reference signals are continuous or discontinuous on a frequency domain;

and/or, when m is greater than 1, between two configurations of the m configurations, the reference signal is located in the same orthogonal frequency division multiplexing OFDM symbol in the time domain or partially located in different OFDM symbols or completely located in different OFDM symbols;

the OFDM symbols occupied by the reference signals with different configurations are located in different time units, and the time units are subframes or time slots or scheduling units or transmission time intervals.

2. The method of claim 1,

the time domain or frequency domain position of the resource element occupied by the reference signal is predefined and determined by a system;

or, the time domain or frequency domain position of the resource element occupied by the reference signal is configured through signaling.

3. The method according to claim 1 or 2, wherein the position of the resource element occupied by the reference signal of at least one of the m configurations is a shift, a flip or a rotation of the position of the resource element occupied by the reference signal of the long term evolution LTE system;

or, when m is greater than 1, the position of the resource element occupied by the reference signal of one configuration in the m configurations is a shift, or a flip, or a rotation of the position of the resource element occupied by the reference signal of another configuration;

or when m is greater than 1, the m configured reference signals are located in different time units, where the time units in which at least two configured reference signals in the m configured reference signals are located correspond to the same first control channel, the first control channel is located in the time unit in which the reference signal in the at least two configured reference signals that is one configured reference signal before in the time domain is located, and the at least two configured reference signals are located at different positions of the time unit;

wherein the shifting is any one or a combination of time domain shifting and frequency domain shifting.

4. The method according to claim 1 or 2, wherein the reference signal is a channel state reference signal (CSIRS) or a user equipment specific reference signal (UE specific RS).

5. A reference signal configuration device is characterized in that the device is a base station device or is integrated in the base station device, and the base station devices exchange time frequency resource information configured by new reference signals; the device comprises:

the device comprises a configuration module, a processing module and a processing module, wherein the configuration module is used for dividing a reference signal into m configurations, m is a positive integer, and the reference signal is a reference signal of other services except for the URLLC service;

a processing module, configured to determine positions of resource elements occupied by the m configured reference signals;

6. The apparatus of claim 5,

7. The apparatus according to claim 5 or 6, wherein the position of the resource element occupied by the reference signal of at least one of the m configurations is a shift, a flip, or a rotation of the position of the resource element occupied by the reference signal of the long term evolution LTE system;

8. The apparatus of any of claims 5 or 6, wherein the reference signal is a channel state reference signal (CSIRS) or a user equipment specific reference signal (UE specific RS).

9. A reference signal configuration apparatus, comprising: a processor and a memory for storing executable instructions, wherein the processor is configured to execute the executable instructions to perform the method of any of claims 1-4.