WO2018024193A1

WO2018024193A1 - Dmrs demodulation-based method and apparatus for controlling channel resource configuration in short tti

Info

Publication number: WO2018024193A1
Application number: PCT/CN2017/095433
Authority: WO
Inventors: 王磊; 高雪娟; 潘学明
Original assignee: 电信科学技术研究院
Priority date: 2016-08-05
Filing date: 2017-08-01
Publication date: 2018-02-08
Also published as: CN107689856B; CN107689856A

Abstract

Embodiments of the present disclosure provide a DMRS demodulation-based method and apparatus for controlling channel resource configuration in a short TTI. The method comprises: determining the quantity of short resource element groups corresponding to a resource unit group in a short TTI control area; circularly numbering, according to the quantity of the short resource element groups, all resource elements in the resource unit group in a frequency domain-to-time domain sequence or in a time domain-to-frequency domain sequence; and combining resource elements having a same number into a short resource element group.

Description

Method and device for configuring control channel resource based on DMRS demodulation in short TTI

Cross-reference to related applications

Priority is claimed on Japanese Patent Application No. 201610638664.X filed on Jan. 5,,,,,,,,,,,,,,

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a method and apparatus for configuring a control channel resource based on a DMRS (Demodulation Reference Signal) demodulation in a short TTI (Transmission Time Interval).

Background technique

The mobile Internet is subverting the traditional mobile communication business model, providing users with an unprecedented experience, which has a profound impact on all aspects of people's work and life. The mobile Internet will promote the further upgrade of human social information interaction methods, providing users with a richer business experience such as augmented reality, virtual reality, ultra high definition (3D) video, mobile cloud and so on. The further development of the mobile Internet will bring about a thousand times increase in mobile traffic in the future, and promote a new round of changes in mobile communication technologies and industries. The Internet of Things has expanded the range of services for mobile communications, from human-to-human communication to the intelligent interconnection of people and things, things and things, making mobile communication technology penetrate into a wider range of industries and fields. In the future, mobile medical, car networking, smart home, industrial control, environmental monitoring, etc. will promote the explosive growth of IoT applications, and hundreds of billions of devices will access the network to achieve a true “Internet of Everything”. At the same time, massive device connectivity and diverse IoT services will also bring new technical challenges to mobile communications.

As new business requirements continue to emerge and become more demanding, higher performance demands are placed on future mobile communication systems, such as higher peak rates, better user experience rates, smaller latency, and higher reliability. Higher spectral efficiency and higher energy efficiency, and need to support more user access and use various types of services. In order to support a large number of types of terminal connections and different types of services, the flexible configuration of uplink and downlink resources has become a major trend in technology development. Future system resources can be divided into different sub-bands according to different services, and TTIs of different lengths are divided on sub-bands to meet various service requirements.

Existing LTE (Long Term Evolution) downlink control channel

The PDCCH (physical downlink control channel) of the LTE system is used to carry scheduling information and other control information. There may be multiple PDCCHs in the control region of each downlink subframe, and the size of the control region is determined by a PCFICH (Physical Control Format Indicator Channel), which is 1 to 4 OFDM (Orthogonal Frequency Division Multiplexing). Frequency division multiplexing) symbols. The transmission of one control channel occupies one CCE (control channel element) or multiple consecutive CCEs, each CCE is composed of 9 REGs (resource element group), and the REG included in the CCE of the PDCCH It is a REG that is not used to carry PCFICH and PHICH (Physical Hybrid Automatic Repeat Indicator Channel).

In order to extend the capacity of the PDCCH, an EPDCCH (Enhanced Physical Downlink Control Channel) is introduced in Rel-11. The EPDCCH is transmitted in a data area in a subframe, and cannot occupy the transmission space of the PDCCH. Similar to the PDCCH, the concept of an EREG (enhanced resource element group) and an ECCE (enhanced control channel element) is introduced.

In the existing LTE system, the TTI length is fixed to 1 ms, and the EREG and ECCE carrying the EPDCCH are defined in units of PRB pairs. A PRB pair includes 12 subcarriers and 14 (normal CP) or 12 (extended CP) OFDM (Orthogonal Frequency Division Multiplexing) symbols. The EREG removes the DMRS RE (resource element) from the PRB pair. Resource element) composition. The shorter the TTI length, the less RE resources are contained in the 12 subcarriers in the frequency domain of the TTI.

However, in the existing standards of the LTE system, a specific scheme of how the resources of the control channel based on the DMRS demodulation in the short TTI are configured in the control region is not proposed.

Summary of the invention

In view of the above technical problem, the embodiments of the present disclosure provide a method and apparatus for configuring a control channel resource based on DMRS demodulation in a short TTI, and implementing resources of a control channel based on DMRS demodulation in a control region, so that a short TTI can be used. Downlink control channel based on DMRS demodulation.

According to a first aspect of an embodiment of the present disclosure, a DMRS demodulation based on a short TTI is provided. a method of controlling channel resource configuration,

Determining the number of short resource element groups corresponding to one resource unit group in the short TTI control region;

According to the number of short resource element groups, all resource elements in the resource unit group are cyclically numbered according to the order of the pre-frequency domain or the first-time domain and the post-frequency domain;

A resource element with the same number is grouped into a short resource element group.

Optionally, the resource unit group is N resource units that are consecutive or dispersed in a frequency domain within a short TTI, and N is a positive integer greater than 1.

Optionally, the resource unit occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 resource blocks, where X1 and X2 are greater than or equal to 1 Positive integer.

Optionally, the longer the time domain length of the short TTI is, the smaller the value of N is. The shorter the time domain length of the short TTI is, the larger the value of N is.

Optionally, the short TTI is composed of Y consecutive OFDM symbols in the time domain, Y is a positive integer greater than or equal to 1, and the length of the short TTI is less than 1 ms.

Alternatively, the Y is equal to 2 or Y is equal to 7.

Optionally, each resource element group includes M short resource element groups, M is a positive integer greater than or equal to 1, and the short resource element group is numbered from 0 to M-1.

Optionally, the resource elements in each resource unit group are numbered from 0 to M-1 in the order of the pre-frequency domain post-time domain or the pre-time domain post-frequency domain.

Optionally, the determining the number of short resource element groups corresponding to one resource unit group includes:

Determine the number of short resource element groups based on the number of resource elements in the resource unit group.

The more the number of resource elements in the resource unit group, the more the number of short resource element groups; the fewer the number of resource elements in the resource unit group, the smaller the number of short resource element groups.

Optionally, when the time domain after the frequency domain is numbered, if the number resource element is the highest resource element in the frequency domain within the resource unit group on one OFDM symbol P, the next number resource element is the next OFDM symbol P+ 1 is the lowest resource element in the frequency domain group, P is an integer greater than or equal to 0, and OFDM symbol P+1 is an OFDM symbol in the short TTI; or

When the first time domain is followed by the frequency domain, if the number resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z, the next number resource element is A resource element corresponding to the first OFDM symbol in the short TTI on the subcarrier Z+1, Z is an integer greater than or equal to 0, and the subcarrier Z+1 is a subcarrier within the resource unit group.

According to a second aspect of the embodiments of the present disclosure, an apparatus for configuring a control channel resource based on DMRS demodulation in a short TTI is provided, including:

a determining module, configured to determine a number of short resource element groups corresponding to one resource unit group in the short TTI control region;

a numbering module, configured to cyclically number all the resource elements RE in the resource unit group according to the number of short resource element groups according to the order of the first frequency domain or the first time domain;

A processing module for grouping resource elements having the same number into a short resource element group.

Optionally, the resource unit occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 RBs, where X1 and X2 are greater than or equal to 1. A positive integer.

Alternatively, the Y is equal to 2 or Y is equal to 7.

Optionally, the determining module is further configured to: determine, according to the quantity of resource elements in the resource unit group, the number of short resource element groups, where

Optionally, the numbering module is further configured to:

When the time domain is numbered in the time domain, if the numbered resource element is on an OFDM symbol P The highest resource element in the frequency domain of the resource unit group, the next number resource element is the lowest resource element in the frequency domain of the resource unit group on the next OFDM symbol P+1, and P is an integer greater than or equal to 0, OFDM The symbol P+1 is an OFDM symbol within the short TTI; or

When the first time domain is followed by the frequency domain, if the numbered resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z, the next numbered resource element is a short TTI on the subcarrier Z+1. A resource element corresponding to the first OFDM symbol, Z is an integer greater than or equal to 0, and subcarrier Z+1 is a subcarrier within the resource unit group.

According to the third aspect of the embodiments of the present disclosure, an apparatus for configuring a control channel resource based on DMRS demodulation in a short TTI is provided, including:

Processor;

a transceiver for receiving and transmitting data under the control of the processor,

The processor is configured to do the following:

According to the number of short resource element groups, all resource elements in the resource unit group are cyclically numbered according to the order of the first frequency domain or the first time domain; and

According to a fourth aspect of embodiments of the present disclosure, there is also provided a non-transitory computer readable storage medium storing computer readable instructions executable by a processor, When a read instruction is executed by a processor, the processor performs the following operations:

One technical solution in the foregoing technical solution has the following advantages or advantages: first, determining the number of SREGs corresponding to one RUG in the short TTI control region; and then, according to the number of SREGs, according to the first frequency domain after all REs in the RUG The sequential cyclic number of the domain or the time domain of the first time domain; the REs with the same number are combined into one SREG, and the resources of the control channel based on DMRS demodulation are configured in the control region, so that the short TTI can use the downlink based on DMRS demodulation Control channel.

DRAWINGS

FIG. 1 is a schematic diagram of a frame structure used by an existing LTE FDD system;

2 is a schematic diagram of a frame structure used by an existing LTE TDD system;

3 is a schematic diagram of an existing downlink resource grid;

4 is a flowchart of a method for configuring a control channel resource in a short TTI according to an embodiment of the present disclosure;

5A-5C are schematic diagrams of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure;

6A-6B are schematic diagrams of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure;

9A-9C are schematic diagrams of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure;

10A-10C are schematic diagrams of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure;

11 is a block diagram of an apparatus for configuring control channel resources in a short TTI in an embodiment of the present disclosure.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

Those skilled in the art will appreciate that embodiments of the present disclosure may be implemented as a system, apparatus, device, method, or computer program product. Thus, embodiments of the present disclosure may be embodied in the form of full hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

The existing LTE FDD (Frequency Division Duplex) system uses a frame structure (frame structure type 1, FS1 for short), and its structure is as shown in FIG. 1. In the FDD system, the uplink and downlink transmissions use different carrier frequencies, and both the uplink and downlink transmissions use the same frame structure. On each carrier, a 10ms length radio frame contains 10 1ms subframes within each subframe. It is divided into two time slots of 0.5 ms long. The TTI duration of uplink and downlink data transmission is 1 ms.

The existing LTE TDD (Time Division Duplex) system uses a frame structure type 2 (FS2), as shown in FIG. 2 . In a TDD system, uplink and downlink transmissions use different subframes or different time slots on the same frequency. Each 10 ms radio frame in FS2 consists of two 5 ms half frames, each of which contains five subframes of 1 ms length. The sub-frames in FS2 are classified into three types: downlink sub-frames, uplink sub-frames, and special sub-frames. Each special sub-frame consists of a Downlink Pilot Time Slot (DwPTS) and a Guard Period (GP). And the Uplink Pilot Time Slot (UpPTS) is composed of three parts. The DwPTS can transmit the downlink pilot, the downlink service data and the downlink control signaling; the GP does not transmit any signal; the UpPTS only transmits the random access and sounding reference symbol (SRS), and cannot transmit the uplink service or the uplink control information. . Each field includes at least one downlink subframe and at least one uplink subframe, and at most one special subframe. Table 7 lists the seven uplink and downlink subframe configurations supported by FS2.

Table 1: Uplink-downlink configurations

Existing LTE downlink resource granularity:

In the existing LTE, the minimum resource granularity in the time domain is one OFDM symbol, and the minimum resource granularity in the frequency domain is one subcarrier. (k, l) is the number of a basic resource element (RE). among them

PRB (physical resource element) is a resource unit of a larger dimension.

RE composition. There is a PRB pair in a subframe. The PRB pair is the basic unit of data resource allocation. See Figure 3.

Referring to FIG. 4, a method for configuring control channel resources in a short TTI is shown. The specific steps are as follows:

Step 401, determining the number of short resource element groups corresponding to a resource unit group in the short TTI control area, and then proceeds to step 402;

Optionally, the implementation of step 401 is: determining the number of SREGs according to the number of resource elements in the resource unit group. Of course, it can be understood that the number of SREGs can also be determined in other manners in this embodiment.

Step 402: According to the number of SREGs, all resource elements in the resource unit group are cyclically numbered according to the order of the first frequency domain or the first time domain and then the frequency domain, and then enter 403;

Step 403, grouping resource elements having the same number into one SREG.

The resource unit group (RU group) is a continuous or distributed N resource unit (RE unit) in a short TTI internal frequency domain, and N is a positive integer greater than 1.

The resource unit occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 RBs, where X1 and X2 are positive integers greater than or equal to 1.

Optionally, in this embodiment, the size of the resource unit group is related to the time domain length of the short TTI. For example, the longer the time domain length of the short TTI is, the smaller the value of N is. The shorter the time domain length of the short TTI is. Short, the value of N is larger.

The short resource element group (Shoreened Resource Element Group, SREG for short) is a mapping resource unit of the control channel in the control region on the short TTI.

It should be noted that one SREG is composed of multiple resource elements (REs) in the same resource unit group, each resource unit group contains M SREGs, and M is a positive integer greater than or equal to 1, for example, M equals 4 or M. Equal to 16, each SREG is numbered from 0 to M-1.

It should be noted that the resource elements in each resource unit group are numbered according to 0 to M-1, and the loop number may be: the first frequency domain back time domain, or the first time domain post-frequency domain. The number starts from the lowest resource element in the frequency domain of the first OFDM symbol of the short TTI and spans different resource elements within the resource unit group. When the number reaches M-1, the number is restarted from 0.

For example, when the time domain is numbered in the pre-frequency domain, if the numbered resource element is the highest resource element in the frequency domain within the resource unit group on an OFDM symbol P (P is an integer greater than or equal to 0), the next number resource element The lowest one resource element in the frequency domain within the resource unit group on the next OFDM symbol P+1 (OFDM symbol P+1 is the OFDM symbol in the short TTI).

When the first time domain is followed by the frequency domain, if the numbered resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z (Z is an integer greater than or equal to 0), Then, the next number resource element is a resource element corresponding to the first OFDM symbol in the short TTI on the subcarrier Z+1 (subcarrier Z+1 is a subcarrier in the resource unit group).

In this embodiment, the value of the foregoing M is related to the total number of resource elements in the resource unit group, and the more the number of resource elements in the resource unit group, the more the number of short resource element groups; the resource elements in the resource unit group The smaller the number, the smaller the number of short resource element groups.

Optionally, the short TTI is composed of Y consecutive OFDM symbols in the time domain, for example, Y is equal to 2 or Y is equal to 7, and the short TTI is less than 1 ms. It is to be understood that Y is not limited in this embodiment. The specific value.

For example: a short TTI containing 2 OFDM symbols for the length of the time domain

A resource group (RU group) is composed of N resource elements (RUs) that are consecutive or dispersed in the frequency domain, N is a positive integer greater than or equal to 1, for example, N=3 or 4; each RU group contains M SREGs M is a positive integer greater than or equal to 1, for example, M=4 or 6 or 11. When each RU group consists of 3 RUs and 4 RUGs in one RU group, all resource elements in the RU group (RE) ), according to the order of the first frequency domain or the time domain of the first time domain, the number range is 0, 1, 2, 3. REs with the same number form an SREG. For example, SREG0 consists of all REs numbered 0, SREG1 consists of all REs numbered 1, and so on.

When each RU group consists of three RUs and one RU group contains six SREGs, all RE elements in the RU group are numbered in the order of the pre-frequency domain or the time domain and the frequency domain. The range is 0, 1, 2, 3, 4, 5. For example, SREG0 consists of all REs numbered 0, SREG1 consists of all REs numbered 1, and so on.

When each RU group consists of 4 RUs and 11 RUGs are included in one RU group, all REs in the RU group are numbered in the order of the pre-frequency domain or the first-time domain and the post-frequency domain. It is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. For example, SREG0 consists of all REs numbered 0, SREG1 consists of all REs numbered 1, and so on.

It should be noted that the numbering may start from the lowest one RE in the frequency domain of the first OFDM symbol of the short TTI and span different RUs in the RU group. When the number reaches M-1, the number is restarted from 0.

When the time domain of the pre-frequency domain is numbered, if the number RE is an OFDM symbol P (P is An integer greater than or equal to 0) The highest RE in the inner frequency domain of the RU group, and the next number RE is the next OFDM symbol P+1 (the OFDM symbol P+1 is the OFDM symbol in the short TTI) The lowest RE in the inner frequency domain.

When the first time domain is followed by the frequency domain, if the number RE is an RE corresponding to the last OFDM symbol in the short TTI on a subcarrier Z (Z is an integer greater than or equal to 0), the next number RE is a subcarrier. Z+1 (subcarrier Z+1 is a subcarrier in the RU group) RE corresponding to the first OFDM symbol in the short TTI.

Another example: a short TTI containing 7 OFDM symbols for the time domain length

The RU group is composed of N consecutive or dispersed NRUs in the frequency domain, N is a positive integer greater than or equal to 1, for example, N=2; each RU group contains M SREGs, and M is a positive integer greater than or equal to 1, for example M=16;

When each RU group consists of 2 RUs and 16 RUGs are included in one RU group, all RE elements in the RU group are cyclically numbered according to the order of the time domain and the time domain. Cycle number,

number range

0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15. REs with the same number form an SREG. For example, SREG0 consists of all REs numbered 0, SREG1 consists of all REs numbered 1, and so on.

It should be noted that the mapping process of the RE in the SREG is the same as the short TTI in which the time domain length includes two OFDM symbols, and is not described here.

In the embodiment of the present disclosure, it is assumed that a short TTI time domain includes 2 OFDM symbols, and an RU group defined by one SREG includes consecutive N=3 RUs (RU N-1, RU N, RU N+1), each The RU group contains M=4 SREGs, and the SREG resource mapping is as shown in FIGS. 5A to 5C. The RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation. As shown in FIG. 5A to FIG. 5C, each RU group includes four SREGs, and each SREG is composed of REs having the same label in the RU group. 5A shows that the short TTI includes only the DMRS for the control channel demodulation in the short TTI, and does not include the CRS AP or the CSI-RS AP; FIG. 5B shows that the short TTI includes the DMRS for the control channel demodulation in the short TTI and One CRS AP; FIG. 5C shows that the short TTI includes a DMRS for control channel demodulation in a short TTI and a CRS AP and a CSI-RS AP. The location of the DMRS is assumed to be within a short TTI of other locations and density distributions. For example, SREG0 consists of all REs whose RE number is 0 in the RU group. The REs that make up the SREG may be CRS or CSI-RS is occupied. As shown in FIGS. 5B and 5C, the REs occupied by the CRS AP and the CSI-RS AP can still serve as the RE of the SREG.

It should be noted that in this embodiment, the RE of the SREG is excluded from the RE that may be occupied by the DMRS. In an actual application, the SREG may include the RE occupied by the DMRS.

In the embodiment of the present disclosure, it is assumed that a short TTI time domain includes 7 OFDM symbols, and an RU group defined by one SREG includes consecutive N=2 RUs (RU N, RU N+1), and each RU group includes M = 16 SREGs, then the SREG resource mapping is shown in Figures 6A-6B. The RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation. As shown in FIG. 6A to FIG. 6B, each RU group includes 16 SREGs, and each SREG is composed of REs having the same label in the RU group. 6A shows a control region including a legacy (legacy) LTE system in a short TTI (assuming 2 OFDM symbols), including a DMRS for control channel demodulation in a short TTI, including 4 CRS ports and 8 CSI-RSs. Port; Figure 6B shows the DMRS and the four CRS ports for the control channel demodulation in the short TTI within the short TTI. For example, SREG0 consists of all REs whose RE number is 0 in the RU group. The REs that make up the SREG may be occupied by CRS or CSI-RS. The REs occupied by the CRS or CSI-RS ports are still calculated into the REs contained in the SREG. As shown in FIGS. 6A to 6B, SREG0, FIGS. 6A to 6B each contain 10 REs. The number of REs contained in different SREGs may be different.

It should be noted that in this embodiment, the RE of the SREG is excluded from the RE that may be occupied by the DMRS. In an actual application, the SREG may include the RE occupied by the DMRS. In addition, the resource mapping method of the SREG first time domain post-frequency domain is applicable to this embodiment.

In the embodiment of the present disclosure, it is assumed that the short TTI time domain includes 2 OFDM symbols, and the RU group defined by one SREG includes discontinuous N=3 RUs (RU0, RU4, and RU8), and each RU group includes M. = 4 SREG, then the SREG resource mapping is shown in Figure 7. In this embodiment, it is assumed that the bandwidth allocated to the short TTI is 10 RUs, and the RU number is from 0 to 9. The RU group is composed of RU0, RU4, and RU8. As shown in FIG. 7, each RU group includes 4 SREGs, and each SREG is composed of REs having the same label in the RU group, and the REs included in the SREG do not include REs occupied by DMRSs for control channel demodulation. (a) indicates that the short TTI includes only the DMRS for control channel demodulation in the short TTI, and does not include the CRS AP or the CSI-RS AP; (b) indicates that the short TTI includes the control channel demodulation for the short TTI. DMRS and a CRS AP; (c) table The short TTI includes a DMRS for control channel demodulation in a short TTI and a CRS AP and a CSI-RS AP. The location of the DMRS is assumed to be within a short TTI of other locations and density distributions. For example, SREG0 consists of all REs whose RE number is 0 in the RU group. The REs that make up the SREG may be occupied by CRS or CSI-RS. As shown in (b) and (c), the REs occupied by the CRS AP and the CSI-RS AP can still serve as the RE of the SREG.

In the disclosed embodiment, it is assumed that the short TTI time domain includes 7 OFDM symbols, and one SREG defined RU group contains dispersed N=2 RUs (RU0 and RU8), for example, RU0 and RU8 within the allocated bandwidth. Each MR group contains M=16 SREGs, and the SREG resource mapping is as shown in FIG. 8. The RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation. As shown in FIG. 8, each RU group includes 16 SREGs, and each SREG is composed of REs having the same label in the RU group. (a) indicating that the control region of the legacy LTE system (assuming 2 OFDM symbols) in the short TTI, including the DMRS for control channel demodulation in the short TTI, including 4 CRS ports and 8 CSI-RS ports; (b) indicates that the short TTI includes a DMRS for control channel demodulation in a short TTI and four CRS ports. For example, SREG0 consists of all REs whose RE number is 0 in the RU group. The REs that make up the SREG may be occupied by CRS or CSI-RS. The REs occupied by the CRS or CSI-RS ports are still calculated into the REs contained in the SREG. As shown in the figure, SREG0, (a) and (b) each contain 10 REs. The number of REs contained in different SREGs may be different.

In the embodiment of the present disclosure, it is assumed that the short TTI time domain includes 2 OFDM symbols, and the RU group defined by one SREG includes consecutive N=4 RUs (RU N-2, RU N-1, RU N, RU N +1), each MR group contains M=11 SREGs, and the SREG resource mapping is as shown in FIG. 9A to FIG. 9C. The RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation. As shown in FIG. 9A to FIG. 9C, each RU group includes 11 SREGs, and each SREG is included in the RU group. The same number of REs are composed. FIG. 9A shows that the short TTI includes only the DMRS for the control channel demodulation in the short TTI, and does not include the CRS AP or the CSI-RS AP; FIG. 9B shows that the short TTI includes the DMRS for the control channel demodulation in the short TTI and One CRS AP; FIG. 9C shows that the short TTI includes a DMRS for control channel demodulation in a short TTI and a CRS AP and a CSI-RS AP. The location of the DMRS is assumed to be within a short TTI of other locations and density distributions. For example, SREG0 consists of all REs whose RE number is 0 in the RU group. The REs that make up the SREG may be occupied by CRS or CSI-RS. As shown in FIG. 9B and FIG. 9C, the REs occupied by the CRS AP and the CSI-RS AP can still serve as the RE of the SREG.

It should be noted that, in this embodiment, the RE of the SREG is excluded from the RE that may be occupied by the DMRS. In an actual application, the SREG may include the RE occupied by the DMRS. In addition, the resource mapping method of the SREG first time domain post-frequency domain is applicable to this embodiment.

In the embodiment of the present disclosure, it is assumed that a short TTI time domain includes 2 OFDM symbols, and an RU group defined by one SREG includes consecutive N=3 RUs (RU N-1, RU N, RU N+1), each If the RU group contains M=7 SREGs, the SREG resource mapping is as shown in FIG. 10A to FIG. 10C. In this embodiment, the mapping of the SREG is preceded by the time domain and the subsequent frequency domain. The RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation. As shown in FIG. 10A to FIG. 10C, each RU group includes seven SREGs, and each SREG is composed of REs having the same label in the RU group. FIG. 10A shows that the short TTI includes only the DMRS for the control channel demodulation in the short TTI, and does not include the CRS AP or the CSI-RS AP; FIG. 10B shows that the short TTI includes the DMRS for the control channel demodulation in the short TTI and One CRS AP; FIG. 10C shows that the short TTI includes a DMRS for control channel demodulation in a short TTI and a CRS AP and a CSI-RS AP. The location of the DMRS is assumed to be within a short TTI of other locations and density distributions. For example, SREG0 consists of all REs whose RE number is 0 in the RU group. The REs that make up the SREG may be occupied by CRS or CSI-RS. As shown in FIGS. 10B and 10C, the REs occupied by the CRS AP and the CSI-RS AP can still serve as the RE of the SREG.

Referring to FIG. 11, there is shown an apparatus for configuring a control channel resource based on DMRS demodulation in a short TTI, the apparatus 1100 comprising:

a determining module 1101, configured to determine a quantity of short resource element groups SREG corresponding to one resource unit group RUG in the short TTI control region;

The numbering module 1102 is configured to cyclically number all the resource elements RE in the resource unit group according to the number of short resource element groups SREG according to the order of the first frequency domain or the first time domain.

The processing module 1103 is configured to group the resource elements RE having the same number into a short resource element group SREG.

Optionally, the resource unit group RUG is N consecutive resource elements RU in a frequency domain within a short TTI, and N is a positive integer greater than 1.

Optionally, the resource unit RU occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 RBs, where X1 and X2 are greater than or equal to 1 Positive integer.

Optionally, the short TTI is composed of Y consecutive OFDM symbols in the time domain, Y is a positive integer greater than or equal to 1, and the length of the short TTI is less than 1 ms. For example, the Y is equal to 2 or Y is equal to 7.

Optionally, the value of the M is related to the total number of resource elements in the resource unit group.

Optionally, the determining module is further configured to: determine, according to the quantity of resource elements RE in the resource unit group RUG, the number of short resource element groups SREG, where the number of resource elements RE in the resource unit group RUG The more the number of short resource element groups SREG, the smaller the number of resource elements RE in the resource unit group RUG, and the smaller the number of short resource element groups SREG.

Optionally, the numbering module is further configured to: when the first frequency domain is numbered, if the numbered resource element is the highest resource element in the frequency domain of the resource unit group on one OFDM symbol P, the next number resource The element is in the inner frequency domain of the resource unit group on the next OFDM symbol P+1 The lowest one resource element, P is an integer greater than or equal to 0, and the OFDM symbol P+1 is an OFDM symbol within the short TTI; or

In this embodiment, the resources of the control channel based on the DMRS demodulation are configured in the control region, so that the short TTI can use the downlink control channel based on DMRS demodulation.

It is to be understood that the phrase "one embodiment" or "an embodiment" or "an" or "an" Thus, "in one embodiment" or "in an embodiment" or "an" In addition, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present disclosure, it should be understood that the size of the serial numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present disclosure. The implementation process constitutes any limitation.

Additionally, the terms "system" and "network" are used interchangeably herein.

It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined from A. However, it should also be understood that determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. Another point, the mutual coupling or display or discussion A direct coupling or communication connection may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

In addition, each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network side device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

The above is an alternative embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and refinements without departing from the principles of the present disclosure. Within the scope of public protection.

Claims

A method for configuring a control channel resource based on DMRS demodulation in a short TTI, comprising:

Determining the number of short resource element groups corresponding to one resource unit group in the short TTI control region;

According to the number of short resource element groups, all resource elements in the resource unit group are cyclically numbered according to the order of the pre-frequency domain or the first-time domain and the post-frequency domain;

A resource element with the same number is grouped into a short resource element group.
The method according to claim 1, wherein the resource unit group is N resource units that are consecutive or dispersed in a frequency domain within a short TTI, and N is a positive integer greater than one.
The method according to claim 2, wherein the resource unit occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 resource blocks, where X1 and X2 are positive integers greater than or equal to 1.
The method according to claim 2, wherein the longer the time domain length of the short TTI is, the smaller the value of N is; the shorter the time domain length of the short TTI is, the larger the value of N is.
The method of claim 1, wherein the short TTI is composed of Y consecutive OFDM symbols in the time domain, Y is a positive integer greater than or equal to 1, and the length of the short TTI is less than 1 ms.
The method of claim 5 wherein Y is equal to 2 or Y is equal to 7.
The method according to claim 1, wherein each resource element group contains M short resource element groups, M is a positive integer greater than or equal to 1, and the short resource element group has a number from 0 to M-1.
The method according to claim 1, wherein the resource elements in each resource unit group are numbered from 0 to M-1 in the order of the pre-frequency domain post-time domain or the pre-time domain post-frequency domain.
The method of claim 1, wherein the determining the number of short resource element groups corresponding to a resource unit group comprises:

Determine the number of short resource element groups based on the number of resource elements in the resource unit group.

The more the number of resource elements in the resource unit group, the more the number of short resource element groups; the fewer the number of resource elements in the resource unit group, the smaller the number of short resource element groups.
The method of claim 1 wherein

When the time domain is numbered in the time domain, if the numbered resource element is on an OFDM symbol P The highest resource element in the frequency domain of the resource unit group, the next number resource element is the lowest resource element in the frequency domain of the resource unit group on the next OFDM symbol P+1, and P is an integer greater than or equal to 0, OFDM The symbol P+1 is an OFDM symbol within the short TTI; or

When the first time domain is followed by the frequency domain, if the numbered resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z, the next numbered resource element is a short TTI on the subcarrier Z+1. A resource element corresponding to the first OFDM symbol, Z is an integer greater than or equal to 0, and subcarrier Z+1 is a subcarrier within the resource unit group.
A device for configuring a control channel resource based on DMRS demodulation in a short TTI, comprising:

a determining module, configured to determine a number of short resource element groups corresponding to one resource unit group in the short TTI control region;

a numbering module, configured to cyclically number all the resource elements RE in the resource unit group according to the number of short resource element groups according to the order of the first frequency domain or the first time domain;

A processing module for grouping resource elements having the same number into a short resource element group.
The apparatus according to claim 11, wherein the resource unit group is N resource units that are consecutive or dispersed in a frequency domain within a short TTI, and N is a positive integer greater than one.
The apparatus according to claim 12, wherein said resource unit occupies all OFDM symbols within a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 RBs, wherein X1 X2 is a positive integer greater than or equal to 1.
The apparatus according to claim 11, wherein the longer the time domain length of the short TTI is, the smaller the value of N is; the shorter the time domain length of the short TTI is, the larger the value of N is.
The apparatus of claim 14, wherein the short TTI is composed of Y consecutive OFDM symbols in the time domain, Y is a positive integer greater than or equal to 1, and the length of the short TTI is less than 1 ms.
The apparatus of claim 15 wherein said Y is equal to 2 or Y is equal to 7.
The apparatus according to claim 11, wherein each resource element group contains M short resource element groups, M is a positive integer greater than or equal to 1, and the short resource element group has a number from 0 to M-1.
The apparatus according to claim 17, wherein the resource elements in each resource unit group are numbered from 0 to M-1 in the order of the pre-frequency domain post-time domain or the pre-time domain post-frequency domain.
The apparatus of claim 11 wherein said determining module is further for: Determining the number of short resource element groups according to the number of resource elements in the resource unit group, wherein

The more the number of resource elements in the resource unit group, the more the number of short resource element groups; the fewer the number of resource elements in the resource unit group, the smaller the number of short resource element groups.
The apparatus of claim 11 wherein said numbering module is further for:

When the time domain of the pre-frequency domain is numbered, if the numbered resource element is the highest resource element in the frequency domain of the resource unit group on one OFDM symbol P, the next number resource element is the resource element of the next OFDM symbol P+1. The lowest resource element in the intra-group frequency domain, P is an integer greater than or equal to 0, and the OFDM symbol P+1 is the OFDM symbol in the short TTI; or

When the first time domain is followed by the frequency domain, if the numbered resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z, the next numbered resource element is a short TTI on the subcarrier Z+1. A resource element corresponding to the first OFDM symbol, Z is an integer greater than or equal to 0, and subcarrier Z+1 is a subcarrier within the resource unit group.
A device for configuring a control channel resource based on DMRS demodulation in a short TTI, comprising:

Processor;

a transceiver for receiving and transmitting data under the control of the processor,

The processor is configured to do the following:

Determining the number of short resource element groups corresponding to one resource unit group in the short TTI control region;

According to the number of short resource element groups, all resource elements in the resource unit group are cyclically numbered according to the order of the first frequency domain or the first time domain; and

A resource element with the same number is grouped into a short resource element group.
A non-transitory computer readable storage medium storing computer readable instructions executable by a processor, the processor executing when the computer readable instructions are executed by a processor The following operations:

Determining the number of short resource element groups corresponding to one resource unit group in the short TTI control region;

According to the number of short resource element groups, all resource elements in the resource unit group are cyclically numbered according to the order of the first frequency domain or the first time domain; and

A resource element with the same number is grouped into a short resource element group.