CN111435890B

CN111435890B - Method for determining PDSCH resource position, terminal and network side equipment

Info

Publication number: CN111435890B
Application number: CN201910028429.4A
Authority: CN
Inventors: 司倩倩; 高雪娟; 艾托尼
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2023-03-24
Anticipated expiration: 2039-01-11
Also published as: CN111435890A

Abstract

The embodiment of the invention provides a method for determining the position of PDSCH resources, a terminal and network side equipment, which relate to the technical field of communication, wherein the method for determining the position of the PDSCH resources applied to the terminal comprises the following steps: acquiring the initial position of PDSCH transmission resources needing buffering, wherein the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, the subcarrier interval of the first subcarrier is smaller than that of the second subcarrier, and the initial position is determined according to the capability of the terminal. Through the mode, the method and the device can avoid the condition that the transmission performance of the system is reduced because the capability of the terminal cannot buffer all necessary data.

Description

Method for determining PDSCH resource position, terminal and network side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a terminal, and a network device for determining PDSCH resource locations.

Background

The current 5G New air interface (New Radio, NR) supports cross-carrier scheduling between carriers with the same subcarrier spacing (i.e., the same numerology carrier) and the carrier scheduling at Rel-15 stage.

Before a User Equipment (UE, also called a terminal) successfully demodulates a Physical Downlink Control Channel (PDCCH), data information corresponding to a transmission position of a Physical Downlink Shared Channel (PDSCH) needs to be buffered, and after the PDCCH is correctly received, a PDSCH resource scheduled by the PDCCH is demodulated.

Currently, the PDSCH may start to be transmitted on the same symbol as the PDCCH, or the PDSCH may start to be transmitted after the PDCCH, but the PDSCH is not supported for transmission before the PDCCH. K0 is a time slot offset value between a time slot in which the PDCCH is located and a time slot in which the PDSCH is located, and the value of K0 may be 0 at the minimum and 32 at the maximum.

Taking fig. 1 as an example, when using the present carrier scheduling, assuming that a PDCCH occupies 3 symbol transmissions on a carrier with a subcarrier spacing of 60kHz, and a UE needs 11 symbols of processing time to receive the PDCCH, the UE needs to buffer 14 symbols of data since the UE does not know the actual transmission position of the PDSCH before successfully demodulating the PDCCH content.

At present, the 5G NR may support cross-carrier scheduling between carriers with different subcarrier intervals at Rel-16 stage, but when the subcarrier interval configured by a scheduling carrier is smaller and the subcarrier interval configured by a scheduled carrier is larger, compared with the carrier scheduling, the UE needs to buffer more data, and there may be a case that the UE capability cannot support buffering more data.

Taking fig. 2 as an example, when cross-carrier scheduling is used, it is assumed that the subcarrier spacing for the scheduled carriers is 15kHz and the subcarrier spacing for the scheduled carriers is 60kHz. On the scheduling carrier, the PDCCH still occupies 3 symbols for transmission, so on the scheduled carrier, the PDCCH needs to occupy 3 × 4=12 symbols. And the UE needs 11 symbols of processing time to receive the PDCCH, so the UE needs to buffer data of 12+11=23 symbols. Compared with the carrier scheduling, the UE needs to buffer more data, and there may be a situation that the UE cannot support buffering more data, which results in a decrease in system transmission performance.

Disclosure of Invention

The embodiment of the invention provides a downlink control channel detection method, a terminal and network side equipment, which aim to solve the problem that when the subcarrier interval configured by a scheduling carrier is smaller and the subcarrier interval configured by the scheduled carrier is larger, the UE capability cannot cache all necessary data, so that the transmission performance of a system is reduced.

In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a method for determining PDSCH resource locations, which is applied to a terminal, and includes:

acquiring the initial position of PDSCH transmission resources needing buffering, wherein the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, the subcarrier interval of the first subcarrier is smaller than that of the second subcarrier, and the initial position is determined according to the capability of the terminal.

Preferably, the capabilities of the terminal include: the processing capability of the terminal comprises the processing time length from the terminal receiving the PDCCH to successfully demodulating the transmission content of the PDCCH, and the caching capability of the terminal comprises the maximum number of symbols which can be stored by the terminal.

Preferably, the unit of the processing time length is the number of symbols of the carrier where the PDCCH or the PDSCH is located, or an absolute time length.

Preferably, before the step of obtaining the starting position of the PDSCH transmission resource to be buffered, the method further includes:

and reporting the processing capacity of the terminal and/or the caching capacity of the terminal.

Preferably, the step of obtaining the starting position of the PDSCH transmission resources to be buffered includes:

determining the number of symbols needing to be cached before successfully demodulating PDCCH transmission content according to the processing capacity of the terminal, the number of symbols occupied by the PDCCH, the subcarrier interval of the first subcarrier and the subcarrier interval of the second subcarrier;

and determining the initial position of the PDSCH transmission resources needing buffering according to the number of the symbols needing buffering and the buffering capacity of the terminal.

Preferably, the step of determining the starting position of the PDSCH transmission resources to be buffered according to the number of the symbols to be buffered and the buffering capability of the terminal includes:

if the number of the symbols needing to be cached is larger than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached is later than the end position of the PDCCH transmission resource; or determining that the starting position of the PDSCH transmission resource needing buffering is not earlier than the xth symbol before the ending position of the PDCCH transmission resource, wherein x is the difference between the buffering capacity and the processing capacity of the terminal;

and if the number of the symbols needing to be cached is not larger than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached is not earlier than the initial position of the PDCCH transmission resource.

and receiving configuration information of the starting position of the PDSCH transmission resource needing buffering sent by the network side equipment.

In a second aspect, an embodiment of the present invention further provides a method for determining PDSCH resource locations, which is applied to a network side device, and includes:

according to the capability of a terminal, determining the initial position of PDSCH transmission resources needing to be cached by the terminal, wherein the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, and the subcarrier interval of the first subcarrier is smaller than that of the second subcarrier.

Preferably, the capabilities of the terminal include: the processing capability of the terminal comprises the processing time length from the time when the terminal receives the PDCCH to the time when the PDCCH transmission content is successfully demodulated, and the caching capability of the terminal comprises the maximum number of symbols which can be stored by the terminal.

Preferably, before the step of determining the starting position of the PDSCH transmission resource that needs to be buffered by the terminal according to the capability of the terminal, the method further includes:

and receiving the processing capacity reported by the terminal and/or the caching capacity of the terminal.

Preferably, the step of determining the starting position of the PDSCH transmission resources that the terminal needs to buffer includes:

determining the number of symbols needing to be cached before the terminal successfully demodulates the PDCCH transmission content according to the processing capacity of the terminal, the number of symbols occupied by the PDCCH, the subcarrier interval of the first subcarrier, the subcarrier interval of the second subcarrier and the time slot offset value between the time slot of the PDCCH and the time slot of the PDSCH;

and determining the initial position of the PDSCH transmission resources which need to be buffered by the terminal according to the number of the symbols which need to be buffered and the buffering capacity of the terminal.

Preferably, the step of determining the starting position of the PDSCH transmission resource that needs to be buffered by the terminal according to the number of the symbols that need to be buffered and the buffering capability of the terminal includes:

if the number of the symbols needing to be cached is larger than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached by the terminal is later than the end position of the PDCCH transmission resource; or, determining that the starting position of the PDSCH transmission resource needing to be cached by the terminal is not earlier than the x-th symbol before the ending position of the PDCCH transmission resource, wherein x is the difference between the caching capacity and the processing capacity of the terminal;

and if the number of the symbols needing to be cached is not greater than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached by the terminal is not earlier than the initial position of the PDCCH transmission resource.

Preferably, after the step of determining the starting position of the PDSCH transmission resource that needs to be buffered by the terminal according to the capability of the terminal, the method further includes:

and sending configuration information of the starting position of the PDSCH transmission resource needing buffering to the terminal.

In a third aspect, an embodiment of the present invention further provides a terminal, including:

an obtaining module, configured to obtain an initial position of PDSCH transmission resources that need to be cached, where the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, a subcarrier interval of the first subcarrier is smaller than a subcarrier interval of the second subcarrier, and the initial position is determined according to a capability of the terminal.

Preferably, the terminal further includes:

and the reporting module is used for reporting the processing capacity of the terminal and/or the caching capacity of the terminal.

Preferably, the obtaining module is configured to determine, according to the processing capability of the terminal, the number of symbols occupied by the PDCCH, the subcarrier spacing of the first subcarrier, and the subcarrier spacing of the second subcarrier, the number of symbols that need to be buffered before successfully demodulating PDCCH transmission content; and determining the initial position of the PDSCH transmission resources needing buffering according to the number of the symbols needing buffering and the buffering capacity of the terminal.

Preferably, the obtaining module is configured to determine that the starting position of the PDSCH transmission resource to be buffered is later than the ending position of the PDCCH transmission resource if the number of the symbols to be buffered is greater than the buffering capability of the terminal; or determining that the starting position of the PDSCH transmission resource needing buffering is not earlier than the xth symbol before the ending position of the PDCCH transmission resource, wherein x is the difference between the buffering capacity and the processing capacity of the terminal; and if the number of the symbols needing to be cached is not larger than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached is not earlier than the initial position of the PDCCH transmission resource.

Preferably, the obtaining module is configured to receive configuration information of a starting position of the PDSCH transmission resource that needs to be buffered, where the configuration information is sent by the network side device.

In a fourth aspect, an embodiment of the present invention further provides a network-side device, where the network-side device includes:

a determining module, configured to determine, according to a capability of a terminal, an initial position of PDSCH transmission resources that the terminal needs to buffer, where the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, and a subcarrier interval of the first subcarrier is smaller than a subcarrier interval of the second subcarrier.

Preferably, the network side device further includes:

and the receiving module is used for receiving the processing capacity reported by the terminal and/or the caching capacity of the terminal.

Preferably, the determining module is configured to determine, according to the processing capability of the terminal, the number of symbols occupied by the PDCCH, the subcarrier spacing of the first subcarrier, the subcarrier spacing of the second subcarrier, and a time slot offset value between a time slot in which the PDCCH is located and a time slot in which the PDSCH is located, the number of symbols that need to be cached before the terminal successfully demodulates PDCCH transmission content; and determining the initial position of the PDSCH transmission resources which need to be buffered by the terminal according to the number of the symbols which need to be buffered and the buffering capacity of the terminal.

Preferably, the determining module is configured to determine that the starting position of the PDSCH transmission resource that needs to be buffered by the terminal is later than the ending position of the PDCCH transmission resource if the number of the symbols that need to be buffered is greater than the buffering capability of the terminal; or, determining that the starting position of the PDSCH transmission resource needing to be cached by the terminal is not earlier than the x-th symbol before the ending position of the PDCCH transmission resource, wherein x is the difference between the caching capacity and the processing capacity of the terminal; and if the number of the symbols needing to be cached is not greater than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached by the terminal is not earlier than the initial position of the PDCCH transmission resource.

Preferably, the network side device further includes:

and the sending module is used for sending configuration information of the initial position of the PDSCH transmission resource needing buffering to the terminal.

In a fifth aspect, an embodiment of the present invention further provides a terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

Preferably, the unit of the processing time length is the number of symbols of a carrier on which the PDCCH or the PDSCH is located, or an absolute time length.

Preferably, the processor executes the program to implement the following steps:

before the step of obtaining the starting position of the PDSCH transmission resource to be buffered, the method further includes:

and reporting the processing capability of the terminal and/or the caching capability of the terminal.

the step of obtaining the starting position of the PDSCH transmission resource needing buffering comprises:

the step of determining the initial position of the PDSCH transmission resources to be buffered according to the number of the symbols to be buffered and the buffering capability of the terminal includes:

if the number of the symbols needing to be cached is larger than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached is later than the end position of the PDCCH transmission resource; or, determining that the starting position of the PDSCH transmission resource needing buffering is not earlier than the xth symbol before the ending position of the PDCCH transmission resource, where x is the difference between the buffering capacity and the processing capacity of the terminal;

the step of obtaining the starting position of the PDSCH transmission resource needing buffering comprises the following steps:

In a sixth aspect, an embodiment of the present invention further provides a network side device, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

before the step of determining the starting position of the PDSCH transmission resource that needs to be buffered by the terminal according to the capability of the terminal, the method further includes:

the step of determining the starting position of the PDSCH transmission resource needing buffering by the terminal comprises the following steps:

and determining the initial position of the PDSCH transmission resources needing to be cached by the terminal according to the number of the symbols needing to be cached and the caching capability of the terminal.

the step of determining the starting position of the PDSCH transmission resources that the terminal needs to buffer according to the number of the symbols that need to buffer and the buffering capacity of the terminal includes:

after the step of determining the starting position of the PDSCH transmission resource that needs to be buffered by the terminal according to the capability of the terminal, the method further includes:

In a seventh aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the steps in the method for determining PDSCH resource locations on a terminal side provided in the embodiment of the present invention, or the program, when executed by the processor, implements the steps in the method for determining PDSCH resource locations on a network side device side provided in the embodiment of the present invention.

In the embodiment of the invention, when cross-carrier scheduling is used, the interval of the subcarriers configured by the scheduling carrier (namely, the first subcarrier) is smaller, and the interval of the subcarriers configured by the scheduling carrier (namely, the second subcarrier) is larger, the initial position of the acquired PDSCH transmission resource needing to be cached is determined according to the capability of the terminal, so that the condition that the transmission performance of the system is reduced because the capability of the terminal cannot cache all necessary data can be avoided.

Drawings

Fig. 1 is a structure diagram of a time slot scheduled by using the present carrier in the prior art;

FIG. 2 is a time slot structure diagram for cross-carrier scheduling when the subcarrier spacing of the scheduling carrier is smaller than that of the scheduled carrier;

FIG. 3 is a schematic diagram of a network architecture to which embodiments of the present invention are applicable;

fig. 4 is a flowchart of a method for determining PDSCH resource locations according to a first embodiment of the present invention;

FIGS. 5-7 are schematic diagrams of time slot structures for cross-carrier scheduling in an application scenario of the present invention;

fig. 8 is a flowchart of a method for determining PDSCH resource locations according to a second embodiment of the present invention;

fig. 9 is a structural diagram of a terminal according to a third embodiment of the present invention;

fig. 10 is a structural diagram of a network-side device according to a fourth embodiment of the present invention;

fig. 11 is a structural diagram of a terminal according to a fifth embodiment of the present invention;

fig. 12 is a block diagram of a network side device according to a sixth embodiment of the present invention.

Detailed Description

To make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Referring to fig. 3, fig. 3 is a schematic diagram of a network structure to which the embodiment of the present invention is applicable, and as shown in fig. 3, the network structure includes a terminal 31 and a network side device 32, where the terminal 31 may be a User Equipment (UE) or other terminal devices, for example: a terminal side Device such as a Mobile phone, a Tablet personal Computer (Tablet personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), it should be noted that a specific type of the terminal is not limited in the embodiments of the present invention. The network side device 32 may be a base station, for example: macro station, LTE eNB, 5G NR NB, etc.; the network side device may also be a small station, such as a Low Power Node (LPN), pico, femto, or an Access Point (AP); the base station may also be a network node that is composed of a Central Unit (CU) and a plurality of Transmission Reception Points (TRPs) whose management is and controls. It should be noted that, in the embodiment of the present invention, the specific type of the network-side device is not limited.

Referring to fig. 4, fig. 4 is a flowchart of a method for determining PDSCH resource locations according to a first embodiment of the present invention, as shown in fig. 4, including the following steps:

step 41: acquiring the initial position of PDSCH transmission resources needing buffering, wherein the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, the subcarrier interval of the first subcarrier is smaller than that of the second subcarrier, and the initial position is determined according to the capability of the terminal.

In the embodiment of the present invention, the capability of the terminal includes: the processing capability of the terminal comprises the processing time length from the terminal receiving the PDCCH to successfully demodulating the transmission content of the PDCCH, and the caching capability of the terminal comprises the maximum number of symbols which can be stored by the terminal.

Preferably, the unit of the processing time length is the number of symbols of the carrier where the PDCCH or the PDSCH is located, or an absolute time length. The processing time length may have different values for different subcarrier spacing configurations.

For example: when the subcarrier interval of the PDCCH is 15kHz, the processing capacity of the terminal is 11 symbols of the carrier where the PDCCH is located, namely the terminal needs to pass through the 11 symbols of the carrier where the PDCCH is located from receiving the PDCCH to successfully demodulating the transmission content of the PDCCH; when the subcarrier interval of the PDCCH is 30kHz, the processing capability of the terminal is 20 symbols of the carrier where the PDCCH is located, that is, the terminal needs to pass through 20 symbols of the carrier where the PDCCH is located from receiving the PDCCH to successfully demodulating the PDCCH transmission content. Another example is: the processing power of the terminal is 196 microseconds, i.e., 196 microseconds are required for the terminal to successfully demodulate the PDCCH transmission from receiving the PDCCH.

In some preferred embodiments of the present invention, before the step of acquiring the starting position of the PDSCH transmission resources that need to be buffered, the method further includes:

Specifically, the terminal may only report the processing capability, and the caching capability of the terminal is agreed by a protocol; the terminal can only report the caching capacity, and the processing capacity of the terminal is agreed by a protocol; the terminal can also report the processing capacity and the caching capacity at the same time.

Of course, in some other embodiments of the present invention, the terminal may not report the processing capability and the buffering capability of the terminal, and both the processing capability and the buffering capability of the terminal are agreed by a protocol.

In the embodiment of the present invention, the starting position of the PDSCH transmission resource to be buffered may be obtained in various ways, which is described in detail below.

As a first alternative implementation: the step of obtaining the starting position of the PDSCH transmission resource needing buffering comprises:

For example, the processing capability of the terminal is 11 Orthogonal Frequency Division Multiplexing (OFDM) symbols under the condition that the subcarrier spacing is 60kHz, the subcarrier spacing of the first subcarrier is 15kHz, the subcarrier spacing of the second subcarrier is 60khz, the pdcch occupies 3 symbols in the first subcarrier transmission, which is equivalent to 12 symbols in the second subcarrier transmission, and the terminal needs to buffer 12+11=23 symbols.

and if the number of the symbols needing to be cached is not more than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached is not earlier than the initial position of the PDCCH transmission resource.

In the above example, the terminal needs to cache 23 symbols, and if the caching capability of the terminal is 14 symbols, the number of symbols that need to be cached is greater than the caching capability of the terminal. It may be determined that the starting position of the PDSCH transmission resources that need buffering is later than the end position of the PDCCH transmission resources, i.e., only symbols after the end position of the PDCCH are buffered. It may also be determined that the starting position of the PDSCH transmission resource to be buffered is not earlier than the 3 (14-11 = 3) th symbol before the end position of the PDCCH transmission resource, that is, the symbol after the end position of the PDCCH is buffered, and the symbol before the end position of the PDCCH may also be buffered, but the starting position of the buffered PDSCH transmission resource is not earlier than the 3 rd symbol before the end position of the PDCCH transmission resource.

If the caching capacity of the terminal is 24 symbols, the number of the symbols needing caching is not more than the caching capacity of the terminal. It may be determined that the starting location of the PDSCH transmission resources that need to be buffered is no earlier than the starting location of the PDCCH transmission resources. That is, not only the symbols after the PDCCH end position but also the symbols before the PDCCH end position may be buffered.

As a second alternative embodiment: the step of obtaining the starting position of the PDSCH transmission resource needing buffering comprises:

That is, the terminal receives the configuration information sent by the network side device, and directly acquires the starting position of the PDSCH transmission resource that needs to be buffered from the configuration information.

And the configuration information is configured by the network side equipment through high-level signaling.

Preferably, in the configuration information, a starting position of the PDSCH transmission resources is not earlier than a starting position of the PDSCH determined based on the terminal capability.

That is, the starting position of the PDSCH transmission resource configured by the network side device is not earlier than the starting position of the PDSCH determined by the terminal according to the first optional embodiment.

Next, a method for determining PDSCH resource locations according to an embodiment of the present invention is specifically illustrated.

In the following three application scenarios, the subcarrier spacing of the first subcarrier CC1 is 15kHz, the subcarrier spacing of the second subcarrier CC2 is 60khz, and the pdcch occupies 3 symbol transmissions on CC 1.

That is, the scheduling carrier is CC1, the scheduled carrier is CC2, and the subcarrier spacing of the scheduling carrier is smaller than the subcarrier spacing of the scheduled carrier. The PDCCH occupies 3 symbols for transmission on CC1, and 12 symbols for transmission on CC 2.

Application scenario one

The processing capacity reported by the UE is 11 OFDM symbols on CC2, that is, the processing time length required from the time the UE receives the PDCCH to the time it successfully demodulates the PDCCH transmission content is 11 OFDM symbols on the scheduled carrier CC 2. And reporting the caching capacity by the UE, and determining that the UE can cache the data of 14 symbols on the CC2 at maximum by the base station based on the caching capacity reported by the UE.

Before the terminal successfully demodulates the PDCCH transmission content, 23 (11 + 12=23) symbols of data on CC2 need to be buffered, which is greater than the buffering capability of the UE. If the UE capability cannot support buffering of data of all 23 symbols, it is determined that the starting position of the PDSCH transmission resource that needs to be buffered is later than the ending position of the PDCCH transmission resource, as shown in fig. 5, the PUCCH transmission resource is the 1 st to 12 th symbols in the slot 4n on the CC2, the ending position of the PUCCH transmission resource is the 12 th symbol in the slot 4n on the CC2, and when the value k0 is 0, the starting position of the PDSCH transmission resource is the 13 th symbol in the slot 4n on the CC2 at the earliest.

Application scenario two

The processing capability of the UE is agreed to be 196 μ s in the protocol, which is equivalent to 11 OFDM symbols on CC2, i.e. the processing time required from the UE receiving the PDCCH to successfully demodulating the PDCCH transmission content is 11 OFDM symbols on CC 2. And the UE reports the caching capacity, and the base station determines that the UE can cache 24 symbols of data on the CC2 at the maximum based on the caching capacity reported by the UE.

Before the terminal successfully demodulates the transmission content of the PDCCH, the data of 23 symbols on the CC2 needs to be buffered, which is not greater than the buffering capability of the UE. The UE capability can buffer data of all 23 symbols in possible PDSCH transmission positions before successfully demodulating the PDCCH, and then determine that the starting position of the PDSCH transmission resource is not earlier than the starting position of the PDCCH transmission resource based on the UE capability, as shown in fig. 6, the PUCCH transmission resource is 1 st to 12 th symbols in a slot 4n on CC2, the starting position of the PUCCH transmission resource is 1 st symbol in a slot 4n on CC2, and when the value of k0 is 0, the starting position of the PDSCH transmission resource is earliest to 1 st symbol in a slot 4n on CC 2.

Application scenario three

The processing capability of the UE is agreed in the protocol to be 2 symbols on a carrier with a 15kHz subcarrier spacing, which is equivalent to 8 OFDM symbols on CC2, i.e. the processing time required from the UE receiving the PDCCH to successfully demodulating the PDCCH transmission content is 8 OFDM symbols on CC 2. And reporting the caching capacity by the UE, and determining that the UE can maximally cache data of 14 symbols on the CC2 by the base station based on the caching capacity reported by the UE.

Before the terminal successfully demodulates the PDCCH transmission content, 20 (8 +12= 20) symbols of data on CC2 need to be buffered, which is greater than the buffering capability of the UE. If the UE capability cannot support buffering of data of all 20 symbols, the base station configures a starting position of a PDSCH transmission resource of the terminal, as shown in fig. 7, where the PUCCH transmission resource is the 1 st to 12 th symbols in a slot 4n on the CC2, and the ending position of the PUCCH transmission resource is the 12 th symbol in the slot 4n on the CC 2. It is determined that the starting position of the PDSCH transmission resource to be buffered is not earlier than the 6 th (14-8=6) symbol before the ending position of the PDCCH transmission resource, that is, when the k0 value is 0, the starting position of the PDSCH transmission resource is the 7 th symbol in the slot 4n on the CC2 at the earliest, and the 7 th symbol in the slot 4n to the 12 th symbol in the slot 4n include 6 symbols in total.

Based on the same inventive concept, the invention also provides a method for determining the PDSCH resource position applied to the network side equipment. Referring to fig. 8, fig. 8 is a flowchart of a method for determining PDSCH resource locations according to a second embodiment of the present invention, including the following steps:

step 81: determining the initial position of PDSCH transmission resources needing buffering of the terminal according to the capability of the terminal, wherein the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, and the subcarrier interval of the first subcarrier is smaller than that of the second subcarrier.

In the embodiment of the invention, when cross-carrier scheduling is used, the interval of the subcarriers configured by the scheduling carrier (namely, the first subcarrier) is smaller, and the interval of the subcarriers configured by the scheduling carrier (namely, the second subcarrier) is larger, the initial position of the PDSCH transmission resource needing buffering is determined according to the capability of the terminal, so that the condition that the transmission performance of the system is reduced because the capability of the terminal cannot buffer all necessary data can be avoided.

and carrying out PDSCH transmission according to the initial position.

That is, after the network side device determines the PDSCH, if the network side device needs to transmit data to the terminal, the network side device may schedule PDSCH transmission not earlier than the starting position through the PDCCH.

For the specific working process of the second embodiment of the present invention, please refer to the description of the method steps in the first embodiment, which is not described herein again.

Referring to fig. 9, fig. 9 is a structural diagram of a terminal according to a third embodiment of the present invention, and as shown in fig. 9, a terminal 90 includes:

an obtaining module 91, configured to obtain an initial position of a PDSCH transmission resource that needs to be buffered, where the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, a subcarrier interval of the first subcarrier is smaller than a subcarrier interval of the second subcarrier, and the initial position is determined according to a capability of the terminal.

Preferably, the terminal 90 further includes:

Preferably, the obtaining module 91 is configured to determine, according to the processing capability of the terminal, the number of symbols occupied by the PDCCH, the subcarrier spacing of the first subcarrier, and the subcarrier spacing of the second subcarrier, the number of symbols that need to be buffered before successfully demodulating PDCCH transmission content; and determining the initial position of the PDSCH transmission resources needing buffering according to the number of the symbols needing buffering and the buffering capacity of the terminal.

Preferably, the obtaining module 91 is configured to determine that the starting position of the PDSCH transmission resource to be buffered is later than the ending position of the PDCCH transmission resource if the number of the symbols to be buffered is greater than the buffering capability of the terminal; or, determining that the starting position of the PDSCH transmission resource needing buffering is not earlier than the xth symbol before the ending position of the PDCCH transmission resource, where x is the difference between the buffering capacity and the processing capacity of the terminal; and if the number of the symbols needing to be cached is not larger than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached is not earlier than the initial position of the PDCCH transmission resource.

Preferably, the obtaining module 91 is configured to receive configuration information of a starting position of a PDSCH transmission resource that needs to be buffered, where the configuration information is sent by a network side device.

It should be noted that, in this embodiment, the terminal 90 may be a terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the terminal in the method embodiment of the present invention may be implemented by the terminal 90 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 10, fig. 10 is a structural diagram of a network-side device according to a fourth embodiment of the present invention, and as shown in fig. 10, the network-side device 100 includes:

a determining module 101, configured to determine, according to a capability of a terminal, an initial position of a PDSCH transmission resource that needs to be cached by the terminal, where the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, and a subcarrier interval of the first subcarrier is smaller than a subcarrier interval of the second subcarrier.

Preferably, the network side device 100 further includes:

Preferably, the determining module 101 is configured to determine, according to the processing capability of the terminal, the number of symbols occupied by the PDCCH, the subcarrier interval of the first subcarrier, the subcarrier interval of the second subcarrier, and a time slot offset value between a time slot in which the PDCCH is located and a time slot in which the PDSCH is located, the number of symbols that need to be cached before the terminal successfully demodulates PDCCH transmission content; and determining the initial position of the PDSCH transmission resources which need to be buffered by the terminal according to the number of the symbols which need to be buffered and the buffering capacity of the terminal.

Preferably, the determining module 101 is configured to determine that the starting position of the PDSCH transmission resource that needs to be buffered by the terminal is later than the ending position of the PDCCH transmission resource if the number of the symbols that need to be buffered is greater than the buffering capability of the terminal; or, determining that the starting position of the PDSCH transmission resource needing to be cached by the terminal is not earlier than the x-th symbol before the ending position of the PDCCH transmission resource, wherein x is the difference between the caching capacity and the processing capacity of the terminal; and if the number of the symbols needing to be cached is not greater than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached by the terminal is not earlier than the initial position of the PDCCH transmission resource.

Preferably, the network-side device 100 further includes:

and the sending module is used for sending the configuration information of the initial position of the PDSCH transmission resource needing buffering to the terminal.

It should be noted that, in this embodiment, the network-side device 100 may be a network-side device in any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 100 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 11, fig. 11 is a structural diagram of a terminal according to a fifth embodiment of the present invention, and as shown in fig. 11, the terminal includes: a transceiver 1110, a memory 1120, a processor 1100, and a program stored on the memory 1120 and executable on the processor 1100, wherein:

the processor 1100 implements the following steps when executing the program:

The transceiver 1110 may be used for receiving and transmitting data, among other things, under the control of the processor 1100.

In FIG. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits of memory, represented by memory 1120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1110 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

It is to be noted that the memory 1120 is not limited to being on the terminal, and the memory 1120 and the processor 1100 may be separated in different geographical locations.

Preferably, the processor 1100 implements the following steps when executing the program:

It should be noted that, the terminal in this embodiment may be a terminal in any implementation manner in the method embodiment in the embodiment of the present invention, and any implementation manner of the terminal in the method embodiment in this embodiment may be implemented by the terminal in this embodiment to achieve the same beneficial effect, which is not described herein again.

Referring to fig. 12, fig. 12 is a structural diagram of a network side device according to a sixth embodiment of the present invention, and as shown in fig. 12, the network side device includes: a transceiver 1210, a memory 1220, a processor 1200, and a program stored on the memory 1220 and executable on the processor, wherein:

the processor 1200 implements the following steps when executing the program:

The transceiver 1210 may be used for receiving and transmitting data under the control of the processor 1200.

In fig. 12, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 1200 and memory represented by memory 1220. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1210 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.

It should be noted that the memory 1220 is not limited to be on a network side device, and the memory 1220 and the processor 1200 may be separated and located in different geographical locations.

Preferably, the processor 1200 implements the following steps when executing the program:

the step of determining the initial position of the PDSCH transmission resource needing to be buffered by the terminal according to the number of the symbols needing to be buffered and the buffering capacity of the terminal comprises the following steps:

if the number of the symbols needing to be cached is larger than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached by the terminal is later than the end position of the PDCCH transmission resource; or determining that the starting position of the PDSCH transmission resource needing buffering by the terminal is not earlier than the xth symbol before the ending position of the PDCCH transmission resource, wherein x is the difference between the buffering capacity and the processing capacity of the terminal;

It should be noted that, in this embodiment, the network side device may be a network side device in any implementation manner in the method embodiment of the present invention, and any implementation manner of the network side device in the method embodiment of the present invention may be implemented by the network side device in this embodiment, and achieve the same beneficial effects, which are not described herein again.

The seventh embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the method for determining the location of PDSCH resources on the terminal side provided in the embodiment of the present invention, or the computer program, when executed by the processor, implements the steps in the method for determining the location of PDSCH resources on the network side device side provided in the embodiment of the present invention.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or 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 units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit may be implemented in the form of hardware, or in the form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the processing method of the information data block according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for determining PDSCH resource positions is applied to a terminal and is characterized by comprising the following steps:

acquiring an initial position of PDSCH transmission resources needing buffering, wherein the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, the subcarrier interval of the first subcarrier is smaller than that of the second subcarrier, and the initial position is determined according to the capability of the terminal;

wherein the capabilities of the terminal include: the processing capability of the terminal comprises the processing time length from the time when the terminal receives the PDCCH to the time when the PDCCH transmission content is successfully demodulated, and the caching capability of the terminal comprises the maximum number of symbols which can be stored by the terminal.

2. The method of claim 1, wherein a unit of the processing time length is a number of symbols of a carrier on which the PDCCH or the PDSCH is located, or an absolute time length.

3. The method of claim 1, wherein the step of obtaining a starting location of the PDSCH transmission resources that need to be buffered is preceded by:

4. The method of claim 1, wherein the step of obtaining a starting location of PDSCH transmission resources that need buffering comprises:

5. The method as claimed in claim 4, wherein the step of determining the starting position of the PDSCH transmission resource to be buffered according to the number of symbols to be buffered and the buffering capability of the terminal comprises:

6. The method of claim 1, wherein the step of obtaining a starting location of PDSCH transmission resources that need buffering comprises:

7. A method for determining PDSCH resource positions is applied to network side equipment, and is characterized by comprising the following steps:

determining the initial position of PDSCH transmission resources needing to be cached by the terminal according to the capability of the terminal, wherein the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, and the subcarrier interval of the first subcarrier is smaller than that of the second subcarrier;

8. The method of claim 7, wherein a unit of the processing time length is a number of symbols of a carrier on which the PDCCH or the PDSCH is located, or an absolute time length.

9. The method of claim 7, wherein the step of determining the starting position of the PDSCH transmission resources required to be buffered by the terminal according to the terminal capability is preceded by the step of:

10. The method of claim 7, wherein the step of determining a starting location of PDSCH transmission resources that the terminal needs to buffer comprises:

11. The method of claim 10, wherein the step of determining a starting position of the PDSCH transmission resources that the terminal needs to buffer according to the number of the symbols that need to buffer and the buffering capability of the terminal comprises:

12. The method of claim 7, wherein after the step of determining a starting position of the PDSCH transmission resources that the terminal needs to buffer according to the terminal's capability, the method further comprises:

13. A terminal, comprising:

an obtaining module, configured to obtain an initial position of PDSCH transmission resources that need to be cached, where the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, a subcarrier interval of the first subcarrier is smaller than a subcarrier interval of the second subcarrier, and the initial position is determined according to a capability of the terminal;

wherein the capabilities of the terminal include: the processing capability of the terminal comprises the processing time length from the terminal receiving the PDCCH to successfully demodulating the transmission content of the PDCCH, and the caching capability of the terminal comprises the maximum number of symbols which can be stored by the terminal.

14. The terminal of claim 13, wherein the unit of the processing time length is a number of symbols of a carrier on which the PDCCH or the PDSCH is located, or an absolute time length.

15. The terminal of claim 13, further comprising:

16. The terminal of claim 13,

the obtaining module is configured to determine, according to the processing capability of the terminal, the number of symbols occupied by the PDCCH, the subcarrier spacing of the first subcarrier, and the subcarrier spacing of the second subcarrier, the number of symbols that need to be cached before successfully demodulating PDCCH transmission content; and determining the initial position of the PDSCH transmission resources needing buffering according to the number of the symbols needing buffering and the buffering capacity of the terminal.

17. The terminal of claim 16,

the obtaining module is configured to determine that the starting position of the PDSCH transmission resource to be buffered is later than the ending position of the PDCCH transmission resource if the number of the symbols to be buffered is greater than the buffering capability of the terminal; or, determining that the starting position of the PDSCH transmission resource needing buffering is not earlier than the xth symbol before the ending position of the PDCCH transmission resource, where x is the difference between the buffering capacity and the processing capacity of the terminal; and if the number of the symbols needing to be cached is not more than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached is not earlier than the initial position of the PDCCH transmission resource.

18. The terminal of claim 13,

the obtaining module is configured to receive configuration information of a starting position of a PDSCH transmission resource that needs to be buffered, where the configuration information is sent by a network side device.

19. A network-side device, comprising:

a determining module, configured to determine, according to a capability of a terminal, an initial position of PDSCH transmission resources that the terminal needs to cache, where the PDSCH is scheduled by a PDCCH on a first subcarrier and transmitted on a second subcarrier, and a subcarrier interval of the first subcarrier is smaller than a subcarrier interval of the second subcarrier;

20. The network-side device of claim 19, wherein a unit of the processing time length is a number of symbols of a carrier on which the PDCCH or the PDSCH is located, or an absolute time length.

21. The network-side device of claim 19, further comprising:

22. The network-side device of claim 19,

the determining module is configured to determine, according to the processing capability of the terminal, the number of symbols occupied by the PDCCH, the subcarrier spacing of the first subcarrier, the subcarrier spacing of the second subcarrier, and a slot offset value between a slot in which the PDCCH is located and a slot in which the PDSCH is located, the number of symbols that need to be cached before the terminal successfully demodulates PDCCH transmission content; and determining the initial position of the PDSCH transmission resources which need to be buffered by the terminal according to the number of the symbols which need to be buffered and the buffering capacity of the terminal.

23. The network-side device of claim 22,

the determining module is configured to determine that the starting position of the PDSCH transmission resource that needs to be cached by the terminal is later than the ending position of the PDCCH transmission resource if the number of the symbols that need to be cached is greater than the caching capability of the terminal; or, determining that the starting position of the PDSCH transmission resource needing to be cached by the terminal is not earlier than the x-th symbol before the ending position of the PDCCH transmission resource, wherein x is the difference between the caching capacity and the processing capacity of the terminal; and if the number of the symbols needing to be cached is not more than the caching capacity of the terminal, determining that the initial position of the PDSCH transmission resource needing to be cached by the terminal is not earlier than the initial position of the PDCCH transmission resource.

24. The network-side device of claim 19, further comprising:

25. A terminal, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

26. The terminal of claim 25, wherein the unit of the processing time length is a number of symbols of a carrier on which the PDCCH or the PDSCH is located, or an absolute time length.

27. The terminal of claim 25, wherein the processor when executing the program performs the steps of:

28. The terminal of claim 25, wherein the processor when executing the program performs the steps of:

29. The terminal of claim 28, wherein the processor when executing the program performs the steps of:

30. The terminal of claim 25, wherein the processor when executing the program performs the steps of:

31. A network-side device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

determining the initial position of PDSCH transmission resources needing to be cached by the terminal according to the capability of the terminal, wherein the PDSCH is scheduled by a PDCCH on a first subcarrier and is transmitted on a second subcarrier, and the subcarrier interval of the first subcarrier is smaller than that of the second subcarrier;

32. The network-side device of claim 31, wherein a unit of the processing time length is a number of symbols of a carrier on which the PDCCH or the PDSCH is located, or an absolute time length.

33. The network-side device of claim 31, wherein the processor when executing the program performs the steps of:

34. The network-side device of claim 31, wherein the processor when executing the program performs the steps of:

35. The network-side device of claim 34, wherein the processor when executing the program performs the steps of:

36. The network-side device of claim 31, wherein the processor when executing the program performs the steps of:

37. A computer readable storage medium, having stored thereon a computer program, characterized in that the program, when being executed by a processor, implements the steps in the method for determining PDSCH resource location according to any of claims 1 to 12.