CN109121181B

CN109121181B - Method for acquiring system message, user equipment and base station

Info

Publication number: CN109121181B
Application number: CN201810616058.7A
Authority: CN
Inventors: 成艳; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-01-25
Filing date: 2013-01-25
Publication date: 2021-02-12
Anticipated expiration: 2033-01-25
Also published as: CN104247558A; WO2014113972A1; CN109121181A; CN104247558B

Abstract

The invention provides a system message acquisition method, user equipment and a base station. The method comprises the steps that user equipment detects a downlink control channel, downlink control information DCI is loaded on the downlink control channel, a DCI format corresponding to the downlink control channel comprises a first information domain, and the first information domain is used for indicating system information; and the user equipment acquires the system message according to the detected DCI carried on the downlink control channel. The embodiment of the invention can improve the acquisition performance of the system message.

Description

Method for acquiring system message, user equipment and base station

Technical Field

The present invention relates to communications technologies, and in particular, to a method for acquiring a system message, a user equipment, and a base station.

Background

In a Long Term Evolution (LTE) system, one radio frame includes 10 subframes, each subframe includes two slots, one slot includes 7 Orthogonal Frequency Division Multiplexing (OFDM) symbols in a normal cyclic prefix, and one slot includes 6 OFDM symbols in an extended cyclic prefix. A base station (evolved NodeB, eNB) schedules a Physical Resource Block pair (PRB pair) as a unit, where one PRB pair occupies one subframe in time and 12 OFDM subcarriers in frequency.

In LTE releases 8-11, system messages are acquired on a Physical Broadcast Channel (PBCH), which may rely on a Common Reference Signal (CRS) for transmit diversity. However, in LTE release 12 and later, a New Carrier Type (NCT) is introduced, where the NCT may be a non-backward compatible Carrier and may only carry a single antenna port CRS, and the single antenna port CRS may only be carried on a part of the bandwidth, and may affect transmission performance of the PBCH with respect to the CRS on the backward compatible Carrier. There is thus a need to address how system messages are acquired at the NCT.

Disclosure of Invention

In view of this, embodiments of the present invention provide a method, user equipment, and a base station for acquiring a system message, so as to implement acquisition of a system message on an NCT.

In a first aspect, a method for acquiring a system message is provided, including:

the method comprises the steps that user equipment detects a downlink control channel, the downlink control channel carries Downlink Control Information (DCI), a DCI format corresponding to the downlink control channel comprises a first information domain, and the first information domain is used for indicating system information;

and the user equipment acquires the system message according to the detected DCI carried on the downlink control channel.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the downlink control channel is an enhanced physical downlink control channel EPDCCH.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the detecting a downlink control channel includes:

detecting a downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe;

the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and the frequency domain starting position of the first physical resource block set is the same as the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the detecting a downlink control channel includes:

the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and a predetermined offset exists between the frequency domain starting position of the first physical resource block set and the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal.

With reference to the second or third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the frequency domain starting position of the first set of physical resource blocks refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the detecting a downlink control channel includes:

the first subframe is a subframe carrying a synchronization signal and/or a discovery signal, and the frequency domain position of the first physical resource block set is not overlapped with the frequency domain position of the physical resource block set carrying the synchronization signal and/or the discovery signal.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the first set of physical resource blocks includes a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and the first set of sub-physical resource blocks and the second set of sub-physical resource blocks are located on two sides of a set of physical resource blocks that carries synchronization signals and/or discovery signals.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the number of physical resource blocks included in the first sub-physical resource block set is the same as the number of physical resource blocks included in the second sub-physical resource block set; alternatively, the first and second electrodes may be,

and the blind detection times of the downlink control channel corresponding to the first sub-physical resource block set are the same as the blind detection times of the downlink control channel corresponding to the second sub-physical resource block set.

With reference to any one of the second to seventh possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, the detecting a downlink control channel on a first resource includes:

the user equipment determines the position of a search space of a downlink control channel according to the cell identifier, and detects the downlink control channel on a first resource according to the position of the search space; alternatively, the first and second electrodes may be,

the first resource comprises a plurality of sub-resources, the user equipment determines the sub-resources occupied by the downlink control channel according to the cell identification, and detects the downlink control channel on the sub-resources occupied by the downlink control channel; alternatively, the first and second electrodes may be,

the first resource comprises a plurality of sub-resources, the downlink control channel occupies one of the plurality of sub-resources, and the user equipment detects the downlink control channel on the plurality of sub-resources through blind detection.

With reference to the first aspect or any one of the first to eighth possible implementation manners of the first aspect, in a ninth possible implementation manner of the first aspect, the acquiring the system message according to the detected DCI carried on the downlink control channel includes:

acquiring a system message according to the value of the first information domain; alternatively, the first and second electrodes may be,

the DCI format further comprises a second information domain, the first system message is obtained according to the value of the first information domain, the Physical Downlink Shared Channel (PDSCH) is received according to the value of the second information domain, the second system message is obtained from the PDSCH, the second information domain is used for indicating the transmission of the PDSCH, and the PDSCH carries the second system message.

With reference to the first aspect or any one of the first to ninth possible implementations of the first aspect, in a tenth possible implementation of the first aspect, the first information field includes one or more of the following:

a domain indicating downlink system bandwidth, a domain indicating system frame number, a domain indicating carrier type corresponding to carrier, and a domain indicating enhanced common search space position.

In a second aspect, a method for acquiring a system message is provided, including:

a base station determines Downlink Control Information (DCI) carried by a downlink control channel, wherein a DCI format corresponding to the downlink control channel comprises a first information domain, and the first information domain is used for indicating system information;

and the base station sends the downlink control channel to user equipment, so that the user equipment acquires the system message according to the DCI loaded on the downlink control channel.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the downlink control channel is an enhanced physical downlink control channel EPDCCH.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the sending the downlink control channel includes:

sending the downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe;

With reference to the second aspect or the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the sending the downlink control channel includes:

With reference to the second possible implementation manner or the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the frequency domain starting position of the first set of physical resource blocks refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the sending the downlink control channel includes:

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the first set of physical resource blocks includes a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and the first set of sub-physical resource blocks and the second set of sub-physical resource blocks are located on two sides of a set of physical resource blocks that carries synchronization signals and/or discovery signals.

With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the number of physical resource blocks included in the first sub-physical resource block set is the same as the number of physical resource blocks included in the second sub-physical resource block set; alternatively, the first and second electrodes may be,

With reference to any one of the second to seventh possible implementation manners of the second aspect, in an eighth possible implementation manner of the second aspect, the sending the downlink control channel on the first resource includes:

determining the position of a search space of the downlink control channel according to the cell identifier, and transmitting the downlink control channel according to the position of the search space; alternatively, the first and second electrodes may be,

determining sub-resources occupied by the downlink control channel on first resources according to cell identifiers, and sending the downlink control channel on the occupied sub-resources; alternatively, the first and second electrodes may be,

and sending the downlink control channel on any one of the first resources.

With reference to the second aspect or any one of the first to eighth possible implementation manners of the second aspect, in a ninth possible implementation manner of the second aspect, the determining, by the base station, downlink control information DCI carried by a downlink control channel includes:

determining a value of the first information field according to a system message; alternatively, the first and second electrodes may be,

and determining the value of the first information domain according to the first system message, and determining the value of the second information domain according to scheduling information of a Physical Downlink Shared Channel (PDSCH), so that the user equipment receives the PDSCH according to the value of the second information domain, and acquires a second system message from the PDSCH.

With reference to the second aspect or any one of the first to ninth possible implementations of the second aspect, in a tenth possible implementation of the second aspect, the first information field includes one or more of the following:

In a third aspect, a user equipment is provided, including:

a detection module, configured to detect a downlink control channel, where the downlink control channel carries downlink control information DCI, and a DCI format corresponding to the downlink control channel includes a first information field, where the first information field is used to indicate a system message;

and an obtaining module, configured to obtain the system message according to the DCI carried on the downlink control channel detected by the detecting module.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the downlink control channel detected by the detecting module is an enhanced physical downlink control channel EPDCCH.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the detecting module is specifically configured to:

With reference to the third aspect or the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the detecting module is specifically configured to:

With reference to the second or third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the frequency domain starting position of the first set of physical resource blocks of the first resource, detected by the detection module, refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the detecting module is specifically configured to:

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the first set of physical resource blocks of the first resource detected by the detection module includes a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and the first set of sub-physical resource blocks and the second set of sub-physical resource blocks are located on two sides of a set of physical resource blocks carrying synchronization signals and/or discovery signals.

With reference to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the number of physical resource blocks included in the first sub-physical resource block set included in the first physical resource block set of the first resource detected by the detection module is the same as the number of physical resource blocks included in the second sub-physical resource block set; or the blind detection times of the downlink control channel corresponding to the first sub-physical resource block set are the same as the blind detection times of the downlink control channel corresponding to the second sub-physical resource block set.

With reference to any one of the second to seventh possible implementation manners of the third aspect, in an eighth possible implementation manner of the third aspect, the detecting module is specifically configured to:

determining the position of a search space of a downlink control channel according to a cell identifier, and detecting the downlink control channel on a first resource according to the position of the search space; alternatively, the first and second electrodes may be,

determining sub-resources occupied by a downlink control channel according to a cell identifier, and detecting the downlink control channel on the sub-resources occupied by the downlink control channel, wherein the first resource comprises a plurality of sub-resources; alternatively, the first and second electrodes may be,

detecting the downlink control channel on the plurality of sub-resources through blind detection, wherein the first resource comprises a plurality of sub-resources, and the downlink control channel occupies one of the plurality of sub-resources.

With reference to the third aspect or any one of the first to eighth possible implementation manners of the third aspect, in a ninth possible implementation manner of the third aspect, the obtaining module is specifically configured to:

and acquiring a first system message according to the value of the first information domain, receiving a Physical Downlink Shared Channel (PDSCH) according to the value of a second information domain, and acquiring a second system message from the PDSCH, wherein the DCI format further comprises the second information domain, the second information domain is used for indicating the transmission of the PDSCH, and the PDSCH carries the second system message.

With reference to the third aspect or any one of the first to ninth possible implementation manners of the third aspect, in a tenth possible implementation manner of the third aspect, the obtaining module is configured to obtain the first information field according to the first information field, where the first information field includes one or more of the following items:

In a fourth aspect, a base station is provided, comprising:

a determining module, configured to determine downlink control information DCI carried by a downlink control channel, where a DCI format corresponding to the downlink control channel includes a first information field, and the first information field is used to indicate a system message;

and a sending module, configured to send the downlink control channel to a user equipment, so that the user equipment obtains a system message according to the DCI loaded on the downlink control channel determined by the determining module.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the downlink control channel sent by the sending module is an enhanced physical downlink control channel EPDCCH.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the sending module is specifically configured to:

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the sending module is specifically configured to:

With reference to the second or third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the frequency domain starting position of the first physical resource block set of the first resource where the downlink control channel is located sent by the sending module refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the first physical resource block set, and the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the physical resource block set carrying the synchronization signal and/or the discovery signal.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the sending module is specifically configured to:

With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the first physical resource block set of the first resource where the downlink control channel sent by the sending module is located includes a first sub-physical resource block set and a second sub-physical resource block set, and the first sub-physical resource block set and the second sub-physical resource block set are located on two sides of a physical resource block set that carries a synchronization signal and/or a discovery signal.

With reference to the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the number of physical resource blocks included in the first physical resource block set of the first resource where the downlink control channel sent by the sending module is located is the same as the number of physical resource blocks included in the second sub-physical resource block set; or the blind detection times of the downlink control channel corresponding to the first sub-physical resource block set are the same as the blind detection times of the downlink control channel corresponding to the second sub-physical resource block set.

With reference to any one of the second to seventh possible implementation manners of the fourth aspect, in an eighth possible implementation manner of the fourth aspect, the sending module is specifically configured to:

and sending the downlink control channel on any one of the first resources.

With reference to the fourth aspect or any one of the first to eighth possible implementation manners of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the determining module is specifically configured to:

With reference to the fourth aspect or any one of the first to ninth possible implementation manners of the fourth aspect, in a tenth possible implementation manner of the fourth aspect, the first information field included in the DCI format corresponding to the downlink control channel sent by the sending module includes one or more of the following items:

Through the technical scheme, the embodiment of the invention can avoid the influence on the transmission of the system message when the transmission performance of the PBCH is influenced by acquiring the system message from the downlink control information carried on the downlink control channel instead of acquiring the system message on the PBCH, thereby realizing the transmission and acquisition of the system message on the NCT.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a schematic flowchart of a method for acquiring a system message according to an embodiment of the present invention;

fig. 2 is a schematic flowchart of another method for acquiring a system message according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a relationship between a frequency domain position of a first set of physical resource blocks and a frequency domain position of a set of physical resource blocks carrying synchronization signals according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating another relationship between a frequency domain position of a first set of physical resource blocks and a frequency domain position of a set of physical resource blocks carrying synchronization signals according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating another relationship between a frequency domain position of a first set of physical resource blocks and a frequency domain position of a set of physical resource blocks carrying synchronization signals according to an embodiment of the present invention;

fig. 6 is a schematic flowchart of another method for acquiring a system message according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.

Detailed Description

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

Fig. 1 is a schematic flowchart of a method for acquiring a system message according to an embodiment of the present invention, where the method includes:

11: the method comprises the steps that user equipment detects a Downlink Control channel, Downlink Control Information (DCI) is loaded on the Downlink Control channel, a DCI format corresponding to the Downlink Control channel comprises a first Information field, and the first Information field is used for indicating system Information;

the DCI format carried on the downlink control channel may be referred to as a DCI format corresponding to the downlink control channel.

Optionally, the first information field may be one or more, for example, the first information field includes one or more of the following items: a domain indicating downlink system bandwidth, a domain indicating system frame number, a domain indicating carrier type corresponding to carrier, and a domain indicating enhanced common search space position. Correspondingly, the system messages indicated by the first information field are respectively: downlink system bandwidth, system frame number, carrier type corresponding to the carrier, and location of the enhanced common search space.

Optionally, the Downlink Control Channel is an Enhanced Physical Downlink Control Channel (EPDCCH).

Optionally, the detecting the downlink control channel includes:

Optionally, the frequency domain starting position of the first set of physical resource blocks refers to the physical resource block number of the physical resource block with the smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal refers to the physical resource block number of the physical resource block with the smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal.

Optionally, the detecting the downlink control channel includes:

Optionally, the first set of physical resource blocks includes a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and the first set of sub-physical resource blocks and the second set of sub-physical resource blocks are located on two sides of a set of physical resource blocks carrying synchronization signals and/or discovery signals.

Optionally, the number of physical resource blocks included in the first sub-physical resource block set is the same as the number of physical resource blocks included in the second sub-physical resource block set; alternatively, the first and second electrodes may be,

and the blind detection times of the downlink control channel corresponding to the first sub-physical resource block set are the same as the blind detection times of the downlink control channel corresponding to the second sub-physical resource block set. Optionally, the detecting the downlink control channel on the first resource includes:

Optionally, the first information field includes one or more of the following items:

12: and the user equipment acquires the system message according to the detected DCI carried on the downlink control channel.

Optionally, the obtaining the system message according to the detected DCI carried on the downlink control channel includes:

the DCI format further includes a second information field, acquires a first system message according to a value of the first information field, receives a Physical Downlink Shared Channel (PDSCH) according to a value of the second information field, and acquires a second system message from the PDSCH, where the second information field is used to indicate transmission of the PDSCH and the PDSCH carries the second system message. Accordingly, referring to fig. 2, the base station side process includes:

21: a base station determines DCI carried by a downlink control channel, wherein a DCI format corresponding to the downlink control channel comprises a first information domain, and the first information domain is used for indicating system information;

optionally, the downlink control channel is EPDCCH.

Optionally, the determining, by the base station, DCI carried by a downlink control channel includes:

and determining the value of the first information domain according to the first system message, and determining the value of the second information domain according to the scheduling information of the PDSCH, so that the user equipment receives the PDSCH according to the value of the second information domain, and acquires the second system message from the PDSCH.

22: and the base station sends the downlink control channel to user equipment, so that the user equipment acquires the system message according to the DCI loaded on the downlink control channel.

Optionally, the sending the downlink control channel includes:

Optionally, the sending the downlink control channel on the first resource includes:

and sending the downlink control channel on any one of the first resources. In the embodiment of the present invention, the downlink control channel may be EPDCCH. Because the EPDCCH is demodulated based on a Demodulation Reference Signal (DMRS), when the system message is acquired according to the DCI transmitted by the EPDCCH, the transmission performance of the system message may be improved, compared to acquiring the system message according to the PBCH that depends on the CRS transmission of a single antenna port; in addition, because PBCH needs to reserve fixed symbols in a specific subframe, the EPDCCH is used for transmitting the system message, and the fixed symbols do not need to be reserved for the transmission of the system message, so that DM-RS (demodulation reference signal) transmission has more selectable symbols, the design of DMRS (demodulation reference signal) can be optimized, and the system performance is improved.

Optionally, the downlink control channel may be transmitted through a first resource, where the first resource is a first set of physical resource blocks on a first subframe.

Optionally, the first subframe may be a next subframe of a subframe carrying a synchronization Signal and/or a Discovery Signal (DS), and a frequency domain starting position of the first set of physical resource blocks may be the same as or offset from a frequency domain starting position of a set of physical resource blocks carrying the synchronization Signal and/or the Discovery Signal.

Optionally, the frequency domain starting position of the first set of physical resource blocks refers to the physical resource block number of the physical resource block with the smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal refers to the physical resource block number of the physical resource block with the smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal. The physical resource block number may be obtained by sequentially numbering according to the position of the physical resource block on the frequency domain.

The Synchronization signals may include Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS). In the prior art, the transmission cycle of the PSS and the SSS is 5 subframes, the frequency domain position of the PSS and the SSS is located within the frequency domain width of 6 PRB pairs in the center of a carrier, and the PSS and the SSS occupy two symbols in the time domain.

For example, referring to fig. 3, the frequency domain starting position of the first set of physical resource blocks is the same as the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal, and referring to fig. 4, the frequency domain starting position of the first set of physical resource blocks is offset from the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal. The offset may be configured in advance, and the frequency domain width of the first set of physical resource blocks may also be configured in advance, and the frequency domain width of the first set of physical resource blocks is the same as the frequency domain width of the set of physical resource blocks carrying the synchronization signal in the figure, but of course, the two widths may also be different.

Optionally, the first subframe may be a subframe carrying a synchronization signal and/or a discovery signal, and the frequency domain position of the first set of physical resource blocks may overlap with or not overlap with the frequency domain position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal at all.

When there is no overlap at all, it may be that the first set of physical resource blocks is located all on the upper side or the lower side of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal in the frequency domain. Or, as shown in fig. 5, the first set of physical resource blocks includes a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and the first set of sub-physical resource blocks and the second set of sub-physical resource blocks are respectively located on two sides of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal in the frequency domain. The first sub-physical resource block set and the second sub-physical resource block set are respectively positioned at two sides of the physical resource block set carrying the synchronization signal and/or the discovery signal, so that the EPDCCH transmitted on the first resource can obtain frequency diversity gain, and the transmission performance of the system message is improved.

In addition, when the above-mentioned are not overlapped at all, the frequency domain position of the first set of physical resource blocks may be adjacent to the frequency domain position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal or have an offset, and the offset may be configured in advance, and fig. 5 takes adjacent as an example.

When the above overlap exists, the physical downlink control channel may only occupy Resource Elements (REs) that are not used for transmitting the synchronization signal, the discovery signal, and the pilot signal in the set of physical Resource blocks used for carrying the synchronization signal and/or the discovery signal.

Optionally, the first set of physical resource blocks in each scenario may be centralized (localized) or distributed (distributed). Localized means that the physical resource block pairs in the first set of physical resource blocks are consecutive physical resource block pairs. Distributed means that at least two physical resource block pairs in the first set of physical resource blocks are discontinuous. When distributed, the frequency domain interval between two adjacent physical resource block pairs in the first set of physical resource blocks may be the same and may be a fixed value, for example, the interval is fixed to 1 physical resource block pair or 2 physical resource block pairs.

In this embodiment, because the first resource and the resource carrying the synchronization signal and/or the discovery signal have a fixed relationship in location, when the ue first detects the synchronization signal and/or the discovery signal, the resource location of the first resource can be obtained according to the resource location of the synchronization signal and/or the discovery signal, thereby avoiding blind detection of the location of the first resource at multiple possible locations, saving power consumption of the ue, and achieving fast acquisition of the system message, thereby reducing the time for the ue to complete synchronization.

After the ue detects the downlink control channel on the first resource, the ue may obtain the system message according to the DCI carried in the downlink control channel.

Optionally, the DCI format corresponding to the downlink control channel may only include the first information field, or the DCI format includes the first information field and the second information field, where the second information field is used to indicate transmission of the PDSCH. It should be noted that, only the first information field is included in the DCI format, which may mean that only the first information field is used to indicate a system message in the DCI format, and at this time, other information fields may be included in the DCI format, for example, an information field used to distinguish the DCI format from other DCI formats.

The first method is as follows: when only the first information field is included in the DCI format, the first information field may include at least one of: a field indicating the bandwidth of a downlink system, a field indicating the frame number of the system, a field indicating the type of a carrier corresponding to the carrier, and a field indicating the position of an enhanced common search space. A field indicating other Master Information Block (MIB) may also be included.

In this way, the base station may carry the first information field indicating the system message in the DCI format corresponding to the EPDCCH. When the user equipment detects the EPDCCH, the system message may be acquired from the DCI according to the DCI format.

The DCI format corresponding to the downlink control channel in the first mode may be a brand new format, that is, a DCI format other than formats 0, 1A, 1B, 1C, 1D, 2A, 2B, 2C, 2D, 3A, and 4, for example, DCI format 2E. But the payload size of the new DCI format is the same as the payload size of at least one existing DCI format, e.g., may be the same as the payload size of DCI format 2D, or may be the same as the payload size of DCI format 1A.

The second method comprises the following steps: when the DCI format includes the first information field and the second information field, the first information field may include a field indicating a downlink system bandwidth; the second information field may contain a field indicating transmission of a PDSCH on which SIB1 or enhanced SIB1 is carried, the enhanced SIB1 contains a field indicating a system frame number, etc.

In this second mode, the first information field may only indicate part of the system messages in the MIB, and may only include a field indicating the downlink system bandwidth, for example. The DCI format corresponding to the EPDCCH may further include a field indicating transmission of a PDSCH, that is, a second information field, where the PDSCH may be used to carry an enhanced SIB1, and the enhanced SIB1 includes a field indicating a system frame number. At this time, the resource allocation field in the DCI format may be indicated according to a specific system bandwidth, the field indicating the system bandwidth in the DCI format may be located at a fixed position in the DCI format (for example, located in a first field of the DCI format), and the user equipment may first read the system bandwidth at the fixed position and then interpret the resource allocation field in the DCI format according to the system bandwidth.

In this second manner, the DCI format corresponding to the downlink control channel may reuse an existing DCI format, and reuse an existing field in the existing DCI format to indicate a system bandwidth, where the existing DCI format may be one or more of DCI 1/1A/1B/1C/1D/2/2A/2B/2C/2D. In this second mode, the system bandwidth of the carrier is first acquired through a certain domain in the DCI format, and then other system messages are acquired according to the content carried in the PDSCH, for example, MIB and SIB1 in the system may be acquired at a time, so that the user can obtain services quickly.

In the embodiment of the present invention, after acquiring the first information domain, the ue may acquire a system message according to the first information domain, where the system message may be an MIB, and for the second mode, the ue may further acquire information carried by the PDSCH, so as to acquire other system messages, and the other system messages may include part of the MIB information and SIB1 information.

In this embodiment, obtaining the system message in the NCT can be implemented by obtaining the system message according to the DCI carried in the downlink control channel. In addition, when the downlink control channel is the EPDCCH, the DCI carried by the EPDCCH acquires the system message, so that the acquisition of the system message based on the DMRS can be realized, the system message is prevented from being acquired by relying on the information transmitted by the CRS of the single antenna port, and the acquisition performance of the system message is improved; the DCI transmitted by the EPDCCH is used for acquiring the system information, and fixed symbols are prevented from being reserved for the PBCH in a specific subframe, so that the design of the DMRS is not limited by the reserved position, the design of the DMRS can be optimized, and the system performance is improved.

Fig. 6 is a flowchart illustrating another method for acquiring a system message according to an embodiment of the present invention, where a plurality of cells share a first resource, and a downlink control channel is an EPDCCH. The embodiment comprises the following steps:

61: the user equipment determines a sub-resource corresponding to the user equipment on the first resource and detects a downlink control channel on the sub-resource corresponding to the user equipment;

the cell sharing method may include the following steps:

the first method is as follows: the starting position of the EPDCCH search space of each cell on the first resource is determined by the cell identifier corresponding to the cell.

In this way, the base station may determine the starting position of the search space of the EPDCCH corresponding to each cell according to the cell identifier, and then send the EPDCCH on the physical resource corresponding to the search space.

The user equipment can determine the initial position of the EPDCCH search space corresponding to the cell according to the cell identifier of the cell to which the user equipment belongs, and then search and acquire the physical downlink control channel in the corresponding search space according to the initial position.

The second method comprises the following steps: the first resource comprises a plurality of sub-resources for bearing the EPDCCH, and the sub-resources occupied by the EPDCCH corresponding to each cell are determined by the cell identifier corresponding to the cell.

In this way, the base station may determine, according to the cell identifier, a sub-resource carrying the EPDCCH corresponding to each cell, and then send the EPDCCH on the determined sub-resource.

The user equipment can determine the sub-resources occupied by the EPDCCH corresponding to the cell according to the cell identifier of the cell to which the user equipment belongs, and then receive the physical downlink control channel on the corresponding sub-resources.

The third method comprises the following steps: the first resource comprises a plurality of sub-resources for bearing the EPDCCH, and the EPDCCH corresponding to each cell occupies fixed sub-resources.

In this way, which cell occupies which sub-resource can be coordinated between cells. The plurality of sub-resources included in the first resource may be multiplexed between the plurality of cells with a fixed multiplexing factor. The sub-resources occupied by different cells may be different, and the sub-resources occupied by cells with geographically distant locations may be the same.

In this way, the base station may send the EPDCCH corresponding to each cell on the fixed sub-resource corresponding to each cell, and the user equipment receives the EPDCCH corresponding to the cell through blind detection on the corresponding fixed sub-resource.

In this way, the sub-resources corresponding to each cell may be different in different sub-frames.

In a fourth mode, the first resource comprises a plurality of sub-resources for bearing the EPDCCH, and the EPDCCH corresponding to each cell can occupy any one of the sub-resources;

in this way, the base stations do not coordinate the respective occupied sub-resources, the base stations can determine to carry the sub-resources of the EPDCCH by themselves, and the user equipment receives the EPDCCH corresponding to the cell by blindly detecting all the sub-resources corresponding to the first resource.

62: and the user equipment acquires a system message according to the physical downlink control channel.

For details, reference may be made to the above description.

In this embodiment, the first resource is shared by multiple cells, so that the transmission efficiency can be improved, and in the first three sharing manners, the resources of multiple cells bearing downlink control channels can be different, thereby avoiding inter-cell interference and improving the transmission performance of system messages.

Fig. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention, where the user equipment 70 includes a detection module 71 and an acquisition module 72; the detecting module 71 is configured to detect a downlink control channel, where the downlink control channel carries downlink control information DCI, and a DCI format corresponding to the downlink control channel includes a first information field, where the first information field is used to indicate a system message; the obtaining module 72 is configured to obtain the system message according to the DCI carried on the downlink control channel detected by the detecting module 71.

Optionally, the downlink control channel detected by the detection module 71 is an enhanced physical downlink control channel EPDCCH.

Optionally, the detection module 71 is specifically configured to:

Optionally, the frequency domain starting position of the first physical resource block set of the first resource, detected by the detecting module 71, refers to a physical resource block number of a physical resource block with a minimum physical resource block number in the first physical resource block set, and the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal refers to a physical resource block number of a physical resource block with a minimum physical resource block number in the physical resource block set carrying the synchronization signal and/or the discovery signal.

Optionally, the detection module 71 is specifically configured to:

Optionally, the first set of physical resource blocks of the first resource detected by the detecting module 71 includes a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and the first set of sub-physical resource blocks and the second set of sub-physical resource blocks are located on two sides of a set of physical resource blocks carrying synchronization signals and/or discovery signals.

Optionally, the number of physical resource blocks included in the first sub-set of physical resource blocks included in the first set of physical resource blocks of the first resource detected by the detecting module 71 is the same as the number of physical resource blocks included in the second sub-set of physical resource blocks; or the blind detection times of the downlink control channel corresponding to the first sub-physical resource block set are the same as the blind detection times of the downlink control channel corresponding to the second sub-physical resource block set.

Optionally, the detection module 71 is specifically configured to:

Optionally, the obtaining module 72 is specifically configured to:

Optionally, the first information field according to which the obtaining module 72 includes one or more of the following items:

In terms of hardware implementation, the detection module may be a receiver or a transceiver, and the acquisition module may be embedded in a processor of the base station in a hardware form or may be independent of the processor of the base station, or may be stored in a memory of the base station in a software form, so that the processor may invoke and execute operations corresponding to the modules. The processor can be a Central Processing Unit (CPU), a microprocessor, a singlechip and the like. It is to be understood that the user equipment may further include general components such as a memory, an antenna, a baseband processing component, a medium radio frequency processing component, an input/output device, and the like, and the embodiments of the present invention are not limited in any way herein.

It should be noted that the user equipment shown in fig. 7 may be used to implement any method related to the user equipment in the above method embodiment, and the description of related terms and specific contents is the same as that of the above method embodiment, and is not repeated herein.

In this embodiment, the system message is acquired according to the downlink control information carried on the downlink control channel, instead of acquiring the system message on the PBCH, so that the influence on the transmission of the system message when the transmission performance of the PBCH is influenced can be avoided, and the transmission and the acquisition of the system message on the NCT are realized.

Fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention, where the base station 80 includes a determining module 81 and a sending module 82; the determining module 81 is configured to determine downlink control information DCI carried by a downlink control channel, where a DCI format corresponding to the downlink control channel includes a first information field, and the first information field is used to indicate a system message; the sending module 82 is configured to send the downlink control channel to the user equipment, so that the user equipment obtains the system message according to the DCI carried on the downlink control channel determined by the determining module.

Optionally, the downlink control channel sent by the sending module 82 is an enhanced physical downlink control channel EPDCCH.

Optionally, the sending module 82 is specifically configured to:

Optionally, the frequency domain starting position of the first physical resource block set of the first resource where the downlink control channel is located sent by the sending module 82 refers to a physical resource block number of a physical resource block with a minimum physical resource block number in the first physical resource block set, and the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal refers to a physical resource block number of a physical resource block with a minimum physical resource block number in the physical resource block set carrying the synchronization signal and/or the discovery signal.

Optionally, the sending module 82 is specifically configured to:

Optionally, the first physical resource block set of the first resource where the downlink control channel is located sent by the sending module 82 includes a first sub-physical resource block set and a second sub-physical resource block set, and the first sub-physical resource block set and the second sub-physical resource block set are located on two sides of a physical resource block set that carries a synchronization signal and/or a discovery signal.

Optionally, the number of physical resource blocks included in the first physical resource block set of the first resource where the downlink control channel is located sent by the sending module 82 is the same as the number of physical resource blocks included in the second sub-physical resource block set; or the blind detection times of the downlink control channel corresponding to the first sub-physical resource block set are the same as the blind detection times of the downlink control channel corresponding to the second sub-physical resource block set.

Optionally, the sending module 82 is specifically configured to:

and sending the downlink control channel on any one of the first resources.

Optionally, the determining module 81 is specifically configured to:

Optionally, the first information field included in the DCI format corresponding to the downlink control channel sent by the sending module 82 includes one or more of the following items:

In terms of hardware implementation, the sending module may be a transmitter or a transceiver, and the determining module may be embedded in a processor of the base station in a hardware form or independent of the processor of the base station, or may be stored in a memory of the base station in a software form, so that the processor invokes and executes operations corresponding to the modules. The processor can be a Central Processing Unit (CPU), a microprocessor, a singlechip and the like. It is to be understood that the base station may further include general components such as a memory, an antenna, a baseband processing component, a medium radio frequency processing component, an input/output device, and the like, and the embodiments of the present invention are not limited in any way herein.

It should be noted that the base station shown in fig. 8 may be used to implement any method related to the base station in the above method embodiment, and the description of related terms and specific contents is the same as that of the above method embodiment, and is not repeated herein.

It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

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

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

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A method for acquiring system messages is characterized by comprising the following steps:

the method comprises the steps that user equipment detects a downlink control channel, the downlink control channel carries Downlink Control Information (DCI), a DCI format corresponding to the downlink control channel comprises a first information domain, and the first information domain is used for indicating system information; a DCI format correspondingly determined by DCI loaded on a downlink control channel;

the user equipment acquires a system message according to the detected DCI carried on the downlink control channel;

wherein the first information field comprises one or more of:

a domain indicating downlink system bandwidth, a domain indicating system frame number, a domain indicating carrier type corresponding to carrier, and a domain indicating enhanced common search space position;

wherein, the detecting the downlink control channel includes: detecting a downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe; the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and the frequency domain starting position of the first physical resource block set is the same as the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal;

alternatively, the first and second electrodes may be,

the detecting the downlink control channel includes: detecting a downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe; the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and a predetermined offset exists between the frequency domain starting position of the first physical resource block set and the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal.

2. The method of claim 1, wherein the downlink control channel is an enhanced physical downlink control channel.

3. The method according to claim 1, wherein the frequency domain starting position of the first set of physical resource blocks refers to the physical resource block number of the physical resource block with the smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal refers to the physical resource block number of the physical resource block with the smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal.

4. The method according to any of claims 1-3, wherein the detecting the downlink control channel on the first resource comprises:

5. The method according to any of claims 1-3, wherein said obtaining the system message according to the detected DCI carried on the downlink control channel comprises:

6. A method for acquiring system messages is characterized by comprising the following steps:

wherein the first information field comprises one or more of:

wherein, the detecting the downlink control channel includes:

7. The method of claim 6, wherein the first set of physical resource blocks comprises a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and wherein the first set of sub-physical resource blocks and the second set of sub-physical resource blocks flank a set of physical resource blocks that carry synchronization signals and/or discovery signals.

8. The method of claim 7,

the number of physical resource blocks contained in the first sub-physical resource block set is the same as the number of physical resource blocks contained in the second sub-physical resource block set; alternatively, the first and second electrodes may be,

9. The method according to any of claims 6-8, wherein the detecting the downlink control channel on the first resource comprises:

10. The method according to any of claims 6-8, wherein said obtaining the system message according to the detected DCI carried on the downlink control channel comprises:

11. A method for transmitting a system message, comprising:

a base station determines Downlink Control Information (DCI) carried by a downlink control channel, wherein a DCI format corresponding to the downlink control channel comprises a first information domain, and the first information domain is used for indicating system information; a DCI format correspondingly determined by DCI loaded on a downlink control channel;

the base station sends the downlink control channel to user equipment;

wherein the first information field comprises one or more of:

wherein the content of the first and second substances,

the sending the downlink control channel includes: sending the downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe; the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and the frequency domain starting position of the first physical resource block set is the same as the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal;

alternatively, the first and second electrodes may be,

the sending the downlink control channel includes: sending the downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe; the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and a predetermined offset exists between the frequency domain starting position of the first physical resource block set and the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal.

12. The method of claim 11, wherein the downlink control channel is an enhanced physical downlink control channel.

13. The method according to claim 11, wherein the frequency domain starting position of the first set of physical resource blocks refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal refers to a physical resource block number of a physical resource block with a smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal.

14. The method according to any of claims 11-13, wherein said transmitting the downlink control channel on the first resource comprises:

and sending the downlink control channel on any one of the first resources.

15. The method according to any of claims 11-13, wherein the base station determines downlink control information, DCI, carried by a downlink control channel, comprising:

and determining the value of the first information domain according to the first system message, and determining the value of the second information domain contained in the DCI format according to the scheduling information of the PDSCH.

16. A method for transmitting a system message, comprising:

the base station sends the downlink control channel to user equipment;

wherein the first information field comprises one or more of:

wherein the sending the downlink control channel includes:

17. The method of claim 16, wherein the first set of physical resource blocks comprises a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and wherein the first set of sub-physical resource blocks and the second set of sub-physical resource blocks flank a set of physical resource blocks that carry synchronization signals and/or discovery signals.

18. The method of claim 17,

19. The method according to any of claims 16-18, wherein said transmitting the downlink control channel on the first resource comprises:

and sending the downlink control channel on any one of the first resources.

20. The method according to any of claims 16-18, wherein the base station determines downlink control information, DCI, carried by a downlink control channel, comprising:

21. A user device, comprising:

a detection module, configured to detect a downlink control channel, where the downlink control channel carries downlink control information DCI, and a DCI format corresponding to the downlink control channel includes a first information field, where the first information field is used to indicate a system message; a DCI format correspondingly determined by DCI loaded on a downlink control channel;

an obtaining module, configured to obtain a system message according to the DCI carried on the downlink control channel detected by the detecting module;

wherein the first information field comprises one or more of:

wherein the content of the first and second substances,

the detection module is specifically configured to: detecting a downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe; the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and the frequency domain starting position of the first physical resource block set is the same as the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal;

wherein, the detection module is specifically configured to:

detecting a downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe; the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and a predetermined offset exists between the frequency domain starting position of the first physical resource block set and the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal.

22. The UE of claim 21, wherein the downlink control channel is an enhanced physical downlink control channel.

23. The ue according to claim 21, wherein the frequency domain starting position of the first set of physical resource blocks of the first resource detected by the detection module is a physical resource block number of a physical resource block with a smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal is a physical resource block number of a physical resource block with a smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal.

24. The ue of any one of claims 21 to 23, wherein the detecting module is specifically configured to:

25. The ue of any one of claims 21 to 23, wherein the obtaining module is specifically configured to:

26. A user device, comprising:

wherein the first information field comprises one or more of:

wherein, the detection module is specifically configured to:

27. The UE of claim 26, wherein the first set of physical resource blocks of the first resource detected by the detection module comprises a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and wherein the first set of sub-physical resource blocks and the second set of sub-physical resource blocks flank a set of physical resource blocks that carry synchronization signals and/or discovery signals.

28. The UE of claim 27, wherein the first set of physical resource blocks of the first resource detected by the detection module comprises the same number of physical resource blocks in the first set of sub-physical resource blocks as the number of physical resource blocks in the second set of sub-physical resource blocks; or the blind detection times of the downlink control channel corresponding to the first sub-physical resource block set are the same as the blind detection times of the downlink control channel corresponding to the second sub-physical resource block set.

29. The ue of any one of claims 26 to 28, wherein the detecting module is specifically configured to:

30. The ue of any one of claims 26 to 28, wherein the obtaining module is specifically configured to:

31. A base station, comprising:

a determining module, configured to determine downlink control information DCI carried by a downlink control channel, where a DCI format corresponding to the downlink control channel includes a first information field, and the first information field is used to indicate a system message; a DCI format correspondingly determined by DCI loaded on a downlink control channel;

a sending module, configured to send the downlink control channel to a user equipment;

wherein the first information field comprises one or more of:

wherein the content of the first and second substances,

the sending module is specifically configured to: sending the downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe; the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and the frequency domain starting position of the first physical resource block set is the same as the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal;

alternatively, the first and second electrodes may be,

wherein the sending module is specifically configured to: sending the downlink control channel on a first resource, wherein the first resource is a first physical resource block set on a first subframe; the first subframe is the next subframe of the subframe carrying the synchronization signal and/or the discovery signal, and a predetermined offset exists between the frequency domain starting position of the first physical resource block set and the frequency domain starting position of the physical resource block set carrying the synchronization signal and/or the discovery signal.

32. The base station of claim 31, wherein the downlink control channel sent by the sending module is an enhanced physical downlink control channel H.

33. The base station of claim 31, wherein the frequency domain starting position of the first set of physical resource blocks of the first resource where the downlink control channel is located sent by the sending module is a physical resource block number of a physical resource block with a smallest physical resource block number in the first set of physical resource blocks, and the frequency domain starting position of the set of physical resource blocks carrying the synchronization signal and/or the discovery signal is a physical resource block number of a physical resource block with a smallest physical resource block number in the set of physical resource blocks carrying the synchronization signal and/or the discovery signal.

34. The base station according to any of claims 31 to 33, wherein the sending module is specifically configured to:

and sending the downlink control channel on any one of the first resources.

35. The base station according to any of claims 31 to 33, wherein the determining module is specifically configured to:

36. A base station, comprising:

wherein the first information field comprises one or more of:

wherein the content of the first and second substances,

the sending module is specifically configured to:

37. The base station according to claim 36, wherein the first set of physical resource blocks of the first resource where the downlink control channel sent by the sending module is located includes a first set of sub-physical resource blocks and a second set of sub-physical resource blocks, and the first set of sub-physical resource blocks and the second set of sub-physical resource blocks are located on two sides of a set of physical resource blocks carrying synchronization signals and/or discovery signals.

38. The base station according to claim 37, wherein the number of physical resource blocks included in the first set of physical resource blocks of the first resource where the downlink control channel is located sent by the sending module is the same as the number of physical resource blocks included in the second set of sub-physical resource blocks; or the blind detection times of the downlink control channel corresponding to the first sub-physical resource block set are the same as the blind detection times of the downlink control channel corresponding to the second sub-physical resource block set.

39. The base station according to any of claims 36 to 38, wherein the sending module is specifically configured to:

and sending the downlink control channel on any one of the first resources.

40. The base station according to any of claims 36 to 38, wherein the determining module is specifically configured to:

41. A computer-readable storage medium having stored thereon a program which, when run on a computer, causes the computer to perform the method of any one of claims 1-10 or the method of any one of claims 11-20.