CN102378366B - The resource position notifying method and system of a kind of control signaling - Google Patents
The resource position notifying method and system of a kind of control signaling Download PDFInfo
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- CN102378366B CN102378366B CN201110297097.3A CN201110297097A CN102378366B CN 102378366 B CN102378366 B CN 102378366B CN 201110297097 A CN201110297097 A CN 201110297097A CN 102378366 B CN102378366 B CN 102378366B
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Abstract
The present invention discloses a kind of resource position notifying method of control signaling, including：Base station is by signaling the resource location information of mono- subframe internal control signaling of UE；A kind of resource location the present invention also provides control signaling notifies system.Technique according to the invention scheme, supports PDSCH region and multiplexing of the ePDCCH regions in same RB, realizes that two channels transmit data in same RB.
Description
Technical Field
The present invention relates to communications systems, and in particular, to a method and system for resource location notification of control signaling.
Background
In a Long Term Evolution (LTE) system and an enhanced LTE (LTE-access) system, a Downlink Physical layer Control signaling includes Downlink Grant (DL Grant) information related to Downlink transmission that needs to be acquired by a User Equipment (UE) and uplink Grant (UL Grant) information related to uplink transmission that needs to be acquired by the UE, and the Downlink Physical layer Control signaling is transmitted on a Physical Downlink Control Channel (PDCCH).
In Release (R, Release)8/9 of the LTE system and R10 of the LTE-advance system, a PDCCH for transmitting downlink physical layer control signaling is generally configured and transmitted on the first N Orthogonal Frequency Division Multiplexing (OFDM) symbols, which are generally referred to as control channel regions.
In the prior art, available transmission resources of a Control Channel region are divided into a plurality of Control Channel Elements (CCEs), resources occupied by Control signaling are allocated in units of CCEs, a CCE may be further subdivided into a plurality of REGs, one CCE is composed of a plurality of discontinuous REGs, generally 9 REGs constitute one CCE, and each REG is further composed of a plurality of basic resource units.
Since the transmission resources occupied by the control signaling are not continuous, in a multi-antenna system, a lot of difficulties are brought to the implementation of the closed-loop precoding technology, so that the control channel region can only use the diversity technology but hardly use the closed-loop precoding technology, the main reason is that the demodulation pilot frequency design and the channel state information feedback of the first precoding region have great design difficulty, and therefore, the physical layer control signaling in the existing version only supports the discontinuous resource transmission and the diversity technology.
In the version after R10, in order to improve the transmission capacity of the control channel and support the control signaling of more users, design considerations open up a new control channel region, and the control signaling transmission resource of the same UE may be a continuous time-frequency resource to support the closed-loop precoding technique, which can improve the transmission performance of the control signaling.
Fig. 1 is a schematic diagram of a control channel region of a new and old version in the prior art, as shown in fig. 1, a horizontal axis of a coordinate is an OFDM symbol, a vertical axis of the coordinate is a Resource Block (RB), a region filled with an oblique line is an old version control channel region, a region filled with a black point is a new version UE data channel region, a black frame region is a new version control channel region, the rest regions are data channel regions available for all versions, and a transmission resource divided in an original Physical Downlink Shared Channel (PDSCH) region of R8/9/10 is used as a new control channel region, so that a closed-loop precoding technology can be supported during transmission of control signaling, control signaling capacity is improved, and control signaling of more users is supported.
In the previous version, the PDSCH resources are allocated in RB units, and as shown in fig. 1, one RB is indicated for each horizontal row, and the data region of one RB is a region excluding the old version control channel region in each horizontal row. When downlink channel transmission resources are allocated, the UE needs to be notified of the RB index, and can know which RBs the data transmission region is according to the information in the resource allocation signaling, and further determine the specific data transmission region according to the symbol configuration of the control signaling.
After the enhanced PDCCH is introduced, in order to ensure sufficient flexibility of resource utilization and improve resource utilization rate, a transmission multiplexing mode shown in fig. 2 is supported, in one RB, a channel region excluding an old version control channel region is divided into two parts, one part is used for UE1 to transmit new control signaling and is called an ePDCCH region, and the other part is used for PDSCH region transmission data of UE 2.
The problem existing in the prior art is that two channels cannot transmit data in the same RB, and when the UE2 transmits data, the resource allocation signaling cannot be allocated in units of RBs any more, but only in units of time slots. This has the problem that the control signalling resource allocation is redesigned and the overhead is increased considerably. If N resources (N ═ 1, 2, 3.... times.m) of M RBs are allocatedIf possible, thenWill be far greater thanThis signaling overhead variation is large and the change of the minimum resource unit of the physical layer results in very poor backward compatibility of the existing protocols.
Disclosure of Invention
In view of this, the main objective of the present invention is to provide a resource location notification method and system for control signaling, which support multiplexing of a PDSCH region and an ePDCCH region in the same RB, and implement data transmission of two channels in the same RB.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a resource position notification method for control signaling, which comprises the following steps: and the base station informs the UE of the resource position information of the control signaling in one subframe through the signaling.
In the above method, before the base station notifies the UE of the resource location information through signaling, the method further includes: the base station determines resource location information of control signaling in one subframe.
In the above method, the base station determines the resource location information of the control signaling in one subframe as follows:
for one subframe, a base station transmits exclusive control signaling of M UEs, the set of resource positions occupied by the exclusive control signaling is Q, a subset P is selected from Q, P is the set of all resource positions or the set of partial resource positions in Q, and P is used as resource position information.
In the above method, the selecting the subset P from Q is:
and X subcarriers at frequency domain positions occupied by resource positions contained in the P, wherein a plurality of OFDM symbols of the X subcarriers in a time domain dimension are not occupied in one subframe.
In the above-mentioned method, the first step of the method,
the signaling is physical layer control signaling;
the physical layer control signaling is transmitted in a common search area of an old version control channel area and/or a common search area of a new version control channel area.
In the above method, the method further comprises: the base station configures in advance through a high-level signaling whether the physical-layer control signaling is transmitted in a common search area of a new-version control channel area.
In the above method, the common search region of the new version of the control channel region is a predefined RB or RBs, or a predefined partial slot of an RB or RBs, or a partial symbol of an RB or RBs, or a discrete number of REs is defined.
In the method, the public search area of the new version control channel area is configured by the base station through a control signaling; the control signaling is the signaling sent by the base station to the UE through the high layer, or the signaling sent by the base station to the UE in the public search area of the old version control channel area.
The invention also provides a resource position notification system of the control signaling, which comprises: a base station and a UE; wherein,
and the base station is used for informing the UE of the resource position information of the control signaling in one subframe through the signaling.
In the above system, the base station is further configured to determine resource location information of the control signaling in one subframe before notifying the UE of the resource location information through the signaling.
According to the resource position notification method and system for the control signaling, the base station notifies the UE of the resource position information of the control signaling in one subframe through the signaling, so that the UE can obtain the resource position information of the control signaling, when the resource of one RB is allocated, whether part of the resource of the RB is occupied by the control signaling of other UE can be interpreted according to the resource position information, so that a borrowing error is avoided, multiplexing of a PDSCH region and an ePDCCH region in the same RB can be supported, and data transmission of two channels in the same RB is realized.
Drawings
Fig. 1 is a diagram of a control channel region of a new and old version in the prior art;
fig. 2 is a diagram illustrating the implementation of transport multiplexing within one RB in the prior art;
FIG. 3 is a flowchart illustrating a resource location notification method for implementing control signaling according to the present invention;
fig. 4 is a diagram illustrating control channel regions of a new or old version according to a first embodiment of the present invention;
fig. 5 is a diagram illustrating control channel regions of a new or old version according to a second embodiment of the present invention;
fig. 6 is a diagram illustrating control channel regions of a new or old version according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of a resource location notification system for implementing control signaling according to the present invention.
Detailed Description
The basic idea of the invention is: and the base station informs the UE of the resource position information of the control signaling in one subframe through the signaling.
The invention is further described in detail below with reference to the drawings and the specific embodiments.
The present invention provides a resource location notification method for control signaling, fig. 3 is a flow diagram of the resource location notification method for implementing control signaling, and as shown in fig. 3, the method includes the following steps:
step 301, a base station determines resource location information of a control signaling in a subframe;
specifically, for one subframe, a base station may transmit dedicated control signaling of M UEs, where the dedicated control signaling does not include dedicated control signaling of UEs transmitted in an old-version control channel region, and a set of resource locations occupied by the dedicated control signaling is represented by Q; the base station further selects a subset P from Q, wherein P represents a set of all resource positions or a set of partial resource positions in Q, and informs the UE of P as resource position information; the principle of selecting the subset P from Q is as follows: the resource positions contained in P occupy X subcarriers in the frequency domain, but a plurality of OFDM symbols of the X subcarriers in the time domain dimension are not occupied in one subframe, and data transmission is allowed on the unoccupied OFDM symbols in one subframe.
Step 302, a base station informs UE of resource position information of a control signaling in one subframe through a signaling;
specifically, the base station notifies the UE of the resource location information of the control signaling in a subframe through a signaling, where the signaling is a physical layer control signaling, and the physical layer control signaling may be transmitted in a common search area of an old version control channel area and/or a common search area of a new version control channel area; whether a physical layer control signaling carrying resource position information is transmitted in a common search area of a new version control channel area or not can be configured in advance by a base station through a high-level signaling, and the UE determines an area for detecting the resource position information P according to the high-level signaling.
Example one
In this embodiment, the base station may transmit dedicated control signaling of multiple UEs on one subframe, and all the new version control channel regions transmit the dedicated control signaling in the first Slot (Slot) defined by the protocol, in this embodiment, 4 UEs are scheduled to transmit in the first Slot of the 4 th RB, the first Slot of the 6 th RB and the 7 th RB, and the first Slot of the 11 th RB, respectively, as shown in fig. 4, and the resource location information is set P { RB4, RB6, RB7, RB11 }.
The base station may send the resource location information in the common search space of the new version control channel region, where the resource location information is limited in time domain location by the control signaling, for example, when the resource location information is transmitted on the first Slot or the first N symbols, the UE may not need to notify the time domain location information again, and the UE only needs to notify the frequency domain location information, such as RB number.
Example two
In this embodiment, the base station may transmit control signaling for a plurality of UEs on one subframe, the control signaling is transmitted in the first Slot and/or the second Slot defined by the protocol in the new version control channel region, 4 UEs are scheduled, as shown in fig. 5, the resource location information is set as P ═ b1 of RB4, Slot2 of RB6, and Slot2 of RB7 in the second Slot of the first Slot, the second Slot of the 6 th RB and the 7 th RB, the first and the second slots of the 10 th RB and the first and the second slots of the 11 th RB of the 4 th RB, respectively, and according to the principle of selecting the subset P from Q, in this embodiment, the set P does not include RBs 10 and RB11 in which both slots are occupied by the control signaling, because there is no case where a PDCCH region and a PDSCH region are multiplexed with a PDSCH region in RB10 and RB 11.
The base station may send the resource location information in the common search space of the new version control channel region, where the resource location information does not define a time domain transmission location in the control signaling, and thus may be transmitted on the first Slot or the first N symbols, or may be transmitted on the second Slot, so that the UE needs to be notified of the time domain location information in addition to the RB number.
EXAMPLE III
This embodiment describes how to transmit resource location information in a common search area of a new version of a control channel area, specifically: as shown in fig. 6, the common search region of the new release control channel region may be a predetermined RB or RBs, or a partial Slot of the predetermined RB or RBs, or other resource locations, such as a partial symbol of the predetermined RB or RBs, or a discrete Resource Element (RE) defined.
The common search area of the new version control channel area may also be configured by the base station through a control signaling, where the control signaling may be a signaling that the base station issues to the UE through a high layer, or a signaling that the base station sends to the UE in the common search area of the old version control channel area.
To implement the above method, the present invention further provides a resource location notification system for control signaling, fig. 7 is a schematic structural diagram of the resource location notification system for implementing control signaling, and as shown in fig. 7, the system includes: base station 71 and UE 72; wherein,
the base station 71 is configured to signal the UE72 of resource location information of control signaling within one subframe.
The base station 71 is further configured to determine resource location information for control signaling within one subframe before signaling the resource location information to the UE 72.
The base station 71 determines the resource location information as: for one subframe, a base station transmits exclusive control signaling of M UEs, the set of resource positions occupied by the exclusive control signaling is Q, a subset P is selected from Q, P is the set of all resource positions or the set of partial resource positions in Q, and P is used as resource position information.
The signaling is physical layer control signaling; the physical layer control signaling is transmitted in a common search area of an old version control channel area and/or a common search area of a new version control channel area.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (5)
1. A method for resource location notification of control signaling, the method comprising: a base station determines resource position information of control signaling in a subframe;
the base station informs the UE of the resource position information of the control signaling in one subframe through the signaling;
the signaling is physical layer control signaling;
the physical layer control signaling is transmitted in a common search area of an old version control channel area and/or a common search area of a new version control channel area;
the base station determines that the resource location information of the control signaling in one subframe is as follows: for one subframe, a base station transmits exclusive control signaling of M pieces of UE, the set of resource positions occupied by the exclusive control signaling is Q, a subset P is selected from Q, P is the set of all resource positions or the set of partial resource positions in Q, and P is used as resource position information;
wherein, the subset P selected from Q is: and X subcarriers at frequency domain positions occupied by resource positions contained in the P, wherein a plurality of OFDM symbols of the X subcarriers in a time domain dimension are not occupied in one subframe.
2. The method of claim 1, further comprising: the base station configures in advance through a high-level signaling whether the physical-layer control signaling is transmitted in a common search area of a new-version control channel area.
3. The method of claim 1 or 2, wherein the common search region of the new version of the control channel region is a predefined RB or RBs, or a predefined partial slot of an RB or RBs, or a partial symbol of an RB or RBs, or a discrete number of REs is defined.
4. The method of claim 1 or 2, wherein the common search area of the new version control channel area is configured by the base station through control signaling; the control signaling is the signaling sent by the base station to the UE through the high layer, or the signaling sent by the base station to the UE in the public search area of the old version control channel area.
5. A resource location notification system for control signaling, the system comprising: a base station and a UE; wherein,
the base station is used for determining resource position information of control signaling in one subframe; the UE is also used for informing the resource position information of the control signaling in one subframe through the signaling;
the signaling is physical layer control signaling;
the physical layer control signaling is transmitted in a common search area of an old version control channel area and/or a common search area of a new version control channel area;
wherein, the base station determines the resource location information of the control signaling in one subframe as follows: for one subframe, a base station transmits exclusive control signaling of M pieces of UE, the set of resource positions occupied by the exclusive control signaling is Q, a subset P is selected from Q, P is the set of all resource positions or the set of partial resource positions in Q, and P is used as resource position information;
wherein, the subset P selected from Q is: and X subcarriers at frequency domain positions occupied by resource positions contained in the P, wherein a plurality of OFDM symbols of the X subcarriers in a time domain dimension are not occupied in one subframe.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326977B (en) * | 2012-03-19 | 2018-03-13 | 中兴通讯股份有限公司 | The configuration of pilot frequency sequence generation parameter, the detection method and device of control signaling |
| CN103327617B (en) * | 2012-03-20 | 2016-08-17 | 上海贝尔股份有限公司 | A kind of resource regulating method and equipment |
| GB2504544A (en) | 2012-08-02 | 2014-02-05 | Nec Corp | Resource allocation signalling within an enhanced Physical Downlink Control Channel (ePDCCH) |
| CN103580837B (en) | 2012-08-03 | 2019-01-22 | 中兴通讯股份有限公司 | Control signaling transmission, detection method and base station and terminal |
| WO2014047897A1 (en) * | 2012-09-28 | 2014-04-03 | 华为技术有限公司 | Resource allocation method, device and system, and resource obtaining method and device |
| CN103716274B (en) | 2012-09-29 | 2018-08-07 | 中兴通讯股份有限公司 | The transmission method and device of Downlink Control Information |
| CN109039568B (en) | 2013-07-16 | 2020-01-03 | 华为技术有限公司 | Control information transmission method, user equipment and base station |
| CN104378826B (en) | 2013-08-14 | 2018-08-07 | 电信科学技术研究院 | A kind of determination of transfer resource, indicating means and terminal, base station |
| CN104955155B (en) * | 2014-03-31 | 2019-01-01 | 中国电信股份有限公司 | PDSCH data receiver method, sending method, user equipment and eNB |
| CN108811131B (en) * | 2017-05-05 | 2023-09-15 | 中兴通讯股份有限公司 | Resource allocation method and device, base station and terminal |
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