CN101990308B - Method for informing physical downlink control channel of relay link and base station - Google Patents
Method for informing physical downlink control channel of relay link and base station Download PDFInfo
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Abstract
The invention discloses a method for informing a physical downlink control channel of a relay link and a base station. The method comprises the steps of: adopting a semi-static inform in a position of a resource block of the physical downlink control channel of the relay link in a frequency direction; and adopting one of a dynamic inform, a semi-static inform and a static inform by the number of orthogonal frequency division multiplexing (OFDM) symbols of the physical downlink control channel of the relay link in the time direction. The invention can be better suitable for a link from the base station and a relay node, has a flexible informing manner, ensures the backward compatibility, and solves the problems of position semi-static inform of the physical downlink control channel of the relay node in the frequency direction and the dynamic, the semi-static and the static informs of the number of the OFDM symbols occupied in the time direction.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of informing physical downlink control channel method and base station of repeated link.
Background technology
Long Term Evolution (Long Term Evolution, referred to as LTE) system, senior Long Term Evolution (Long Term Evolution Advanced, referred to as LTE-A) system, senior ternational Mobile Telecommunications (International Mobile TelecommunicationAdvanced, referred to as IMT-Advanced) be all with OFDM (OrthogonalFrequency Division Multiplexing, referred to as OFDM) based on technology, the data mode of mainly time-frequency bidimensional in an ofdm system, at LTE, Resource Block (Resource Block in LTE-A, referred to as RB, resource block mapping is then called Physical Resource Block on physical resource, Physical Resource Block, referred to as PRB) be defined as the OFDM symbol in continuous 1 time slot (slot) in time-domain, continuous 12 or 24 subcarriers in frequency domain, so 1 RB is by N
symb× N
sc rBindividual Resource Unit (Resource Element, referred to as RE), wherein N
symbrepresent the number of the OFDM symbol in 1 slot, N
sc rBrepresent the number of Resource Block continuous subcarrier in frequency domain.
Logic channel Broadcast Control Channel (Broadcast ControlChannel in current LTE system, referred to as BCCH) be divided into Master Information Block (Master Information Block, referred to as MIB) and system information block (System Information Block, referred to as SIB), wherein MIB is mapped to transmission channel broadcast channel (Broadcast Channel, referred to as BCH) on, SIB is mapped on transmission channel DSCH Downlink Shared Channel (Downlink-SharedChannel, referred to as DL-SCH); Transmission channel BCH is mapped to Physical Broadcast Channel (Physical Broadcast Channel, referred to as PBCH) on, transmission channel DL-SCH is mapped on Physical Downlink Shared Channel (Physical Downlink Shared Channel, referred to as PDSCH).
Mib information territory comprises 24bits information, order is followed successively by downlink bandwidth, PHICH configuration information, System Frame Number, spare bit, and specifically often kind of information comprises: dl-Bandwidth (3bits), phich-Config (3bits: comprise 1bit phich-Duration and 2bitsphich-Resource), systemFrameNumber (8bits), spare (10bits).Bit number to be encoded equals 40bits, and namely the information bit of 24bits adds the check digit of 16bits, because terminal did not also know concrete antenna configuration before demodulation PBCH, so the check digit of 16bits needs to carry out scrambling according to the antenna configuration of eNode-B.Bit order to be encoded carries out tail-biting convolutional code, QPSK modulation, multiple antennas process, resource mapping.
Physical Control Format Indicator Channel (Physical ControlFormat Indicator Channel in current LTE system, referred to as PCFICH) indicate several OFDM symbol for Physical Downlink Control Channel (Physical Downlink Control Channel, referred to as PDCCH), the information of 2bits represents 4 kinds of situations respectively, wherein a kind of situation retains, it is concrete when system bandwidth is greater than 10 Resource Block, represent that 1 or 2 or 3 OFDM symbol are for carrying PDCCH, when system bandwidth is less than or equal to 10 Resource Block, represent that 2 or 3 or 4 OFDM symbol are for carrying PDCCH.
New link is added after introducing relaying (relay) node in lte-a system, corresponding term comprises: the link between cNode-B and relay is called back haul link or repeated link (backhaul link), link between relay and subscriber equipment (User Equipment, referred to as UE) is called access link (access link), link between Node B (eNode-B) and UE is called the link that direct transfers (direct link).
At present, research for backhaul link Resourse Distribute is a focus, as physics repeated link Physical Downlink Control Channel (Relay-Physical Downlink ControlChannel, referred to as R-PDCCH) adopt semi-static (semi-statically) to notify for carrying R-PDCCH Physical Resource Block PRBs position in a frequency direction, and the part OFDM symbol of PRBs or all OFDM symbol may be used for carrying R-PDCCH.
For the semi-static notice in position how making R-PDCCH PRBs in a frequency direction in correlation technique, and dynamic, semi-static, the static notice of OFDM symbol number shared on time orientation, at present effective solution is not yet proposed.
Summary of the invention
For the semi-static notice in position how making R-PDCCH PRBs in a frequency direction, and on time orientation shared dynamic, semi-static, the static notice of OFDM symbol number problem and the present invention is proposed, for this reason, main purpose of the present invention is the informing physical downlink control channel method and the base station that provide a kind of repeated link, to solve the problem.
To achieve these goals, according to an aspect of the present invention, a kind of informing physical downlink control channel method of repeated link is provided.
Informing physical downlink control channel method according to repeated link of the present invention comprises: the position of the Physical Downlink Control Channel Resource Block in a frequency direction of repeated link adopts semi-static notice; The OFDM symbol number shared on time orientation of the Physical Downlink Control Channel of repeated link adopt in dynamic, semi-static and static notice one of.
Preferably, the position of Resource Block in a frequency direction adopts semi-static notice also to comprise: adopt semi-static notice by the Physical Broadcast Channel of repeated link and/or the Physical Control Format Indicator Channel of the second repeated link, OFDM symbol number shared on time orientation adopt in dynamic, semi-static and static notice one of comprise: notified by the Physical Control Format Indicator Channel of the first repeated link.
Preferably, semi-static notice is adopted also to comprise by the Physical Broadcast Channel of repeated link and/or the Physical Control Format Indicator Channel of the second repeated link: the position of the Physical Downlink Control Channel notifying repeated link in the subframe of one or more repeated link Resource Block in a frequency direction, wherein, have periodically between several repeated link subframes, OFDM symbol number shared on time orientation adopts dynamically, in semi-static and static notice one of also comprise: in the subframe of one or more repeated link, notify the OFDM symbol number that the Physical Downlink Control Channel of repeated link is shared on time orientation, have between one or more repeated link subframe periodically.
Preferably, the Physical Downlink Control Channel of the repeated link OFDM symbol number that the position of Resource Block and the Physical Downlink Control Channel of repeated link are shared on time orientation is in a frequency direction by semi-static notice one of in the Physical Control Format Indicator Channel of the Physical Broadcast Channel of repeated link, the Physical Control Format Indicator Channel of first repeated link and second repeated link.
Preferably, semi-static notice is the position of the OFDM symbol number that notifies that in one or more repeated link subframe the Physical Downlink Control Channel of repeated link is shared on time orientation and Resource Block in a frequency direction, wherein, have between one or more repeated link subframe periodically.
Preferably, periodically to refer in the time interval and number of sub-frames interval one of at least.
Preferably, the raw information form that shared on time orientation OFDM symbol number is corresponding can be: 1 bit, 2 bits, 3 bits, 4 bits; The raw information form that in frequency direction, the position of Resource Block is corresponding can be: the raw information form that in the descending control format that 1 bit, 2 bits, 3 bits, 4 bits or base station issue to the Physical Downlink Control Channel of terminal links, any one resource distribution mode is corresponding.
Preferably, the method also comprises, and encodes to raw information, and the encoder bit rate that coding is corresponding can be one of in 1/6,1/12,1/16,1/24 and 1/32.
Preferably, modulation system corresponding to the information after coding can be one of in quaternary PSK, 16 quadrature amplitude modulation and 64 quadrature amplitude modulation.
Preferably, the Physical Control Format Indicator Channel of repeated link can map one of in the following ways in a frequency direction: when repeated link Physical Control Format Indicator Channel and base station to the terminal links of version 8 or version 9 Physical Downlink Shared Channel shared by resource overlapping time, the data in resource are punched; When repeated link Physical Control Format Indicator Channel and base station to the terminal links of version 10 Physical Downlink Shared Channel shared by resource overlapping time, resource does not send data; The same bandwidth of frequency band that the Physical Control Format Indicator Channel of repeated link and the Physical Downlink Control Channel of repeated link comprise, and in the band width of the center frequency-band Resource Block of frequency band uniform mapping; The same bandwidth of frequency band that the Physical Control Format Indicator Channel of repeated link and the Physical Downlink Control Channel of repeated link comprise, and in frequency band uniform mapping.
To achieve these goals, according to a further aspect in the invention, a kind of base station is provided.
This base station comprises: the semi-static notification module of frequency, for adopting semi-static notice to notify node to the position of Resource Block in a frequency direction; Time announcement module, for one of adopting in dynamic, semi-static and static notice notice node to shared OFDM symbol number on time orientation.
Preferably, the semi-static notification module of frequency is specifically for notifying by the Physical Broadcast Channel of repeated link and/or the Physical Control Format Indicator Channel of the second repeated link; Time announcement module notifies specifically for the Physical Control Format Indicator Channel by the first repeated link.
Preferably, the semi-static notification module of frequency, specifically for the position of the Physical Downlink Control Channel Resource Block in a frequency direction that notifies repeated link in the subframe of one or more repeated link, wherein, has periodically between several repeated link subframes; Time announcement module, specifically for notifying the OFDM symbol number that the Physical Downlink Control Channel of repeated link is shared on time orientation in the subframe of one or more repeated link, has between one or more repeated link subframe periodically.
By the present invention, the position of the Physical Downlink Control Channel Resource Block in a frequency direction of repeated link is adopted to adopt semi-static notice, the OFDM symbol number that the Physical Downlink Control Channel of repeated link is shared on time orientation adopts dynamically, one of in semi-static and static notice, solve the semi-static notice in position how making R-PDCCH PRBs in a frequency direction, and shared OFDM symbol number is dynamic on time orientation, semi-static, the problem of static notice, and then achieve and be applicable to base station well to via node link, advice method is flexible, both ensure that backwards compatibility (compatible LTE system), also the semi-static notice in position of R-PDCCH PRBs is in a frequency direction solved, and shared OFDM symbol number is dynamic on time orientation, semi-static, the effect of static notice.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the informing physical downlink control channel method of repeated link according to the embodiment of the present invention;
Fig. 2 is the structural representation of the informing physical downlink control channel system according to the embodiment of the present invention;
Fig. 3 is the frame structure schematic diagram according to the embodiment of the present invention;
Fig. 4 is Resource Block, subcarrier schematic diagram according to the embodiment of the present invention;
Fig. 5 adopts time orientation dynamic notification, the semi-static notice schematic diagram of R-PBCH frequency direction according to the R-PCFICH_1 of the embodiment of the present invention;
Fig. 6 adopts the semi-static notice of time orientation, the semi-static notice schematic diagram of R-PCFICH_2 frequency direction according to the preferred R-PCFICH_1 of the embodiment of the present invention;
Fig. 7 adopts the semi-static notice of time orientation, the semi-static notice schematic diagram of R-PCFICH_2 frequency direction according to the preferred R-PCFICH_1 of the embodiment of the present invention;
Fig. 8 adopts the semi-static notice of time orientation, the semi-static notice schematic diagram of frequency direction according to the R-PBCH of the embodiment of the present invention;
Fig. 9 adopts the semi-static notice of time orientation, the semi-static notice schematic diagram of frequency direction according to the R-PCFICH of the embodiment of the present invention;
Figure 10 is the schematic diagram of the base station according to the embodiment of the present invention.
Embodiment
Functional overview
Consider in correlation technique the semi-static notice in position how making R-PDCCH PRBs in a frequency direction, and dynamic, semi-static, the static problem notified of OFDM symbol number shared by time orientation, embodiments provide the informing physical downlink control channel method of repeated link, the method comprises: the position of the Physical Downlink Control Channel Resource Block in a frequency direction of repeated link adopts semi-static notice; The OFDM symbol number shared on time orientation of the Physical Downlink Control Channel of repeated link adopt in dynamic, semi-static and static notice one of.
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Embodiment of the method
According to embodiments of the invention, provide a kind of informing physical downlink control channel method of repeated link.
Fig. 1 is the flow chart of the informing physical downlink control channel method of repeated link according to the embodiment of the present invention.
As shown in Figure 1, the method comprises following step S202 to step S204:
Step S202, the position of the Physical Downlink Control Channel Resource Block in a frequency direction of repeated link adopts semi-static notice;
Step S204, the OFDM symbol number shared on time orientation of the Physical Downlink Control Channel of repeated link adopt in dynamic, semi-static and static notice one of,
Wherein, the order of above-mentioned two steps can be exchanged.
Below the method is described in detail:
Concrete also the comprising of the method:
(1) the OFDM symbol number that the Physical Downlink Control Channel of repeated link is shared on time orientation, the dynamic or semi-static notice by the Physical Control Format Indicator Channel of first repeated link; The position of Resource Block in a frequency direction, by the semi-static notice of the Physical Broadcast Channel of repeated link, or, by the semi-static notice of the Physical Control Format Indicator Channel of second repeated link, when the Physical Control Format Indicator Channel of described first repeated link and the Physical Control Format Indicator Channel of second repeated link exist simultaneously, can be mapped in identical OFDM symbol, also can be mapped in different OFDM symbol;
(2) the OFDM symbol number static state that the Physical Downlink Control Channel of repeated link is shared on time orientation notifies or remains unchanged; The position of Resource Block in a frequency direction, by the semi-static notice of the Physical Broadcast Channel of repeated link, or, by the semi-static notice of the Physical Control Format Indicator Channel of second repeated link;
(3) the OFDM symbol number that the Physical Downlink Control Channel of repeated link is shared on time orientation, the position of Resource Block in a frequency direction, the semi-static notice of Physical Broadcast Channel by repeated link, or, the semi-static notice of Physical Control Format Indicator Channel by first repeated link, or, the semi-static notice of the Physical Control Format Indicator Channel by second repeated link.
Fig. 2 is the structural representation of the informing physical downlink control channel system according to the embodiment of the present invention; Fig. 3 is the frame structure schematic diagram according to the embodiment of the present invention; Fig. 4 is Resource Block, subcarrier schematic diagram according to the embodiment of the present invention.
Preferably, on time orientation, the Physical Control Format Indicator Channel dynamic notification of first repeated link refers to and all notify the OFDM symbol number that the Physical Downlink Control Channel of repeated link is shared on time orientation in each repeated link subframe; Semi-static notice refers to the OFDM symbol number notifying that in several repeated link subframes the Physical Downlink Control Channel of repeated link is shared on time orientation, has periodically between several repeated link subframes.
Preferably, in frequency direction, the semi-static notice of Physical Broadcast Channel of repeated link, or, the semi-static notice of Physical Control Format Indicator Channel of second repeated link refers to the position of the Physical Downlink Control Channel Resource Block in a frequency direction notifying repeated link in several repeated link subframes, has periodically between several repeated link subframes.
Preferably, in time orientation and frequency direction, the semi-static notice of Physical Broadcast Channel by repeated link, or, the semi-static notice of Physical Control Format Indicator Channel by first repeated link, or, the semi-static notice of Physical Control Format Indicator Channel by second repeated link refers to the OFDM symbol number notifying that in several repeated link subframes the Physical Downlink Control Channel of repeated link is shared on time orientation, the position of Resource Block in a frequency direction, has between several repeated link subframes periodically.
Preferably, above-mentioned periodicity shows the time interval or number of sub-frames interval, described periodicity shows that the time interval refers to that interval x millisecond launches the Physical Control Format Indicator Channel of first repeated link, or the Physical Control Format Indicator Channel of second repeated link, or the Physical Broadcast Channel of repeated link; Described periodicity shows that number of sub-frames interval refers to that a y subframe in interval launches the Physical Control Format Indicator Channel of first repeated link, or the Physical Control Format Indicator Channel of second repeated link, or the Physical Broadcast Channel of repeated link.
Preferably, the raw information form that shared on time orientation OFDM symbol number is corresponding can be:
Indication information corresponding 2 kinds of situations respectively of 1bit;
Indication information corresponding 4 kinds of situations respectively of 2bits;
Indication information corresponding 8 kinds of situations respectively of 3bits;
Indication information corresponding 16 kinds of situations respectively of 4bits.
Preferably, the raw information form that in frequency direction, the position of Resource Block is corresponding can be:
Indication information corresponding 2 kinds of situations respectively of 1bit;
Indication information corresponding 4 kinds of situations respectively of 2bits;
Indication information corresponding 8 kinds of situations respectively of 3bits;
Indication information corresponding 16 kinds of situations respectively of 4bits.
Now binary bits can represent concrete number of resource blocks, also can represent the ratio with total resources block in system.
Or, the raw information form that in frequency direction, the position of Resource Block is corresponding can be for: the resource distribution mode in LTE system corresponding to base station to the Physical Downlink Shared Channel of terminal links or Physical Uplink Shared Channel, i.e. any one resource distribution mode in the descending control format that issues to the Physical Downlink Control Channel of terminal links of base station.
Preferably, the encoder bit rate that raw information is corresponding can be 1/6,1/12,1/16,1/24 or 1/32.
Preferably, modulation system corresponding to the information after coding can be quaternary PSK QPSK or 16 quadrature amplitude modulation (16Quadrature Amplitude Modulation, referred to as 16QAM) 64QAM.
Preferably, multiple antennas processing mode corresponding to the constellation symbol after modulation can be in LTE system base station to the Physical Broadcast Channel of terminal links or physical down control format indicating channel multiple antennas processing mode.
Preferably, when there is the Physical Control Format Indicator Channel of repeated link, its mapping mode in a frequency direction can be:
(1) in LTE system base station to the Physical Control Format Indicator Channel mapping mode in a frequency direction of terminal links, when the Physical Control Format Indicator Channel of repeated link and base station are to version 8 (Release8, referred to as R8) or version 9 (Release9, referred to as R9) resource shared by Physical Downlink Shared Channel of terminal links overlapping time, the Physical Downlink Shared Channel data on the resource of base station to R8 or R9 terminal links are punched; When the Physical Control Format Indicator Channel of repeated link and base station are to version 10 (Release10, referred to as R10) resource shared by Physical Downlink Shared Channel of terminal links overlapping time, to the Physical Downlink Shared Channel of R10 terminal links, the strategy hidden is adopted to base station, does not namely send data on the resource; When the resource shared by the Physical Control Format Indicator Channel of repeated link and the Physical Downlink Shared Channel of repeated link is overlapping, the Physical Downlink Shared Channel of repeated link adopts the strategy hidden, and does not namely send data on the resource;
(2) the same bandwidth of frequency band comprised with the Physical Downlink Control Channel of repeated link, and in the band width of center frequency-band m the Resource Block altogether of described frequency band uniform mapping;
(3) the same bandwidth of frequency band comprised with the Physical Downlink Control Channel of repeated link, and in described frequency band uniform mapping.
Be described in detail below in conjunction with the implementation procedure of example to the embodiment of the present invention.
Embodiment one:
Fig. 5 be R-PCFICH_1 (Physical Control Format Indicator Channel of first repeated link) according to the embodiment of the present invention adopt time orientation dynamically, the semi-static notice schematic diagram of R-PBCH frequency direction.
As shown in Figure 5, the OFDM symbol number of Physical Downlink Control Channel shared by time orientation of repeated link, by the Physical Control Format Indicator Channel dynamic notification of first repeated link; The position of Resource Block in a frequency direction, by the semi-static notice of the Physical Broadcast Channel of repeated link.
First R-PCFICH carries 2bits raw information, is illustrated respectively on time orientation and has 1,2,3,4 OFDM symbol for carrying R-PDCCH, and 2bits raw information corresponding in Fig. 5 is " 10 ", represents 2 OFDM symbol carrying R-PDCCH;
The wherein a part of information carried in R-PBCH is the positional information of R-PDCCH PRBs in a frequency direction, as 2bits raw information, be illustrated respectively in and frequency direction have in total resources block in 1/4 system, 1/2 system in total resources block, 3/4 system in total resources block, all system total resources block for carrying R-PDCCH, 2bits raw information corresponding in Fig. 5 is " 01 ", represent total resources block in 1/4 system (supposing that now system has 25 Resource Block), totally 6 Resource Block carrying R-PDCCH.
The semi-static notice time orientation of embodiment two: the first R-PCFICH, second semi-static frequency of notification direction of R-PCFICH.
Fig. 6 is, R-PCFICH_2 frequency direction semi-static notice schematic diagram semi-static according to the embodiment of the present invention preferred R-PCFICH_1 employing time orientation.
As shown in Figure 6, the OFDM symbol number of Physical Downlink Control Channel shared by time orientation of repeated link, by the semi-static notice of the Physical Control Format Indicator Channel of first repeated link; The position of Resource Block in a frequency direction, by the semi-static notice of the Physical Control Format Indicator Channel of second repeated link; And the Physical Control Format Indicator Channel of the Physical Control Format Indicator Channel of first repeated link and second repeated link is mapped in different OFDM symbol.
First R-PCFICH carries 2bits raw information, and 2bits raw information corresponding in Fig. 6 is " 11 ", represents 3 OFDM symbol carrying R-PDCCH.
Second R-PCFICH carries 2bits raw information, be illustrated respectively in frequency direction and have 4 Resource Block, 8 Resource Block, 12 Resource Block, 16 Resource Block for carrying R-PDCCH, 2bits raw information corresponding in Fig. 6 is " 01 ", represents 4 Resource Block carrying R-PDCCH.
Embodiment three:
Fig. 7 is, R-PCFICH_2 (Physical Control Format Indicator Channel of second repeated link) frequency direction semi-static notice schematic diagram semi-static according to the embodiment of the present invention preferred R-PCFICH_1 employing time orientation.
As shown in Figure 7, the OFDM symbol number of Physical Downlink Control Channel shared by time orientation of repeated link, by the semi-static notice of the Physical Control Format Indicator Channel of first repeated link; The position of Resource Block in a frequency direction, by the semi-static notice of the Physical Control Format Indicator Channel of second repeated link; And the Physical Control Format Indicator Channel of the Physical Control Format Indicator Channel of first repeated link and second repeated link is mapped in identical OFDM symbol.
First R-PCFICH carries 2bits raw information, and 2bits raw information corresponding in Fig. 7 is " 11 ", represents 3 OFDM symbol carrying R-PDCCH;
Second R-PCFICH carries 2bits raw information, be illustrated respectively in frequency direction and have 4 Resource Block, 8 Resource Block, 12 Resource Block, 16 Resource Block for carrying R-PDCCH, 2bits raw information corresponding in Fig. 7 is " 01 ", represents 4 Resource Block carrying R-PDCCH.
Embodiment four:
Fig. 8 is, frequency direction semi-static notice schematic diagram semi-static according to the R-PBCH employing time orientation of the embodiment of the present invention.
As shown in Figure 8, the OFDM symbol number of Physical Downlink Control Channel shared by time orientation of repeated link, the position of Resource Block in a frequency direction, the semi-static notice of the Physical Broadcast Channel by repeated link.
The wherein a part of information carried in R-PBCH is the OFDM symbol number information of R-PDCCH shared by time orientation, and the positional information of PRBs in a frequency direction, as (2+9) bits raw information, front 2bits is illustrated respectively on time orientation has 1,2,3,4 OFDM symbol for carrying R-PDCCH, front 2bits raw information corresponding in Fig. 8 is " 01 ", represents 1 OFDM symbol carrying R-PDCCH; Rear 9bits adopts resource distribution mode tree-like in descending control format in LTE system, adopts formula
when can calculate this resource distribution mode of employing, the bit number of the positional information of PRBs in a frequency direction, wherein n is total resources block number in system (supposing that now system has 25 Resource Block), "
" represent and round up, totally 8 Resource Block carrying R-PDCCH.
Embodiment five:
Fig. 9 is, frequency direction semi-static notice schematic diagram semi-static according to any one R-PCFICH employing time orientation of the embodiment of the present invention.
As shown in Figure 9, the OFDM symbol number of Physical Downlink Control Channel shared by time orientation of repeated link, the position of Resource Block in a frequency direction, the semi-static notice of the Physical Control Format Indicator Channel by any one repeated link.
The wherein a part of information carried in R-PCFICH is the OFDM symbol number information of R-PDCCH shared by time orientation, and the positional information of PRBs in a frequency direction, as (2+2) bits raw information, front 2bits is illustrated respectively on time orientation has 1,2,3,4 OFDM symbol for carrying R-PDCCH, front 2bits raw information corresponding in Fig. 9 is " 11 ", represents 3 OFDM symbol carrying R-PDCCH; Rear 2bits is illustrated respectively in frequency direction has 4 Resource Block, 8 Resource Block, 12 Resource Block, 16 Resource Block for carrying R-PDCCH, and 2bits raw information corresponding in Fig. 9 is " 01 ", represents 4 Resource Block carrying R-PDCCH.
Device embodiment
According to embodiments of the invention, provide a kind of base station.
Figure 10 is the schematic diagram of the base station according to the embodiment of the present invention.
As shown in Figure 10, this base station 100 comprises: the semi-static notification module 102 of frequency and time announcement module 104.
The effect of each module is described below: the semi-static notification module 102 of frequency, for adopting semi-static notice node to the position of Resource Block in a frequency direction; Time announcement module 104, for one of adopting in dynamic, semi-static and static notice notice node to shared OFDM symbol number on time orientation.
Preferably, in base station 100, the semi-static notification module 102 of frequency is specifically for notifying by the Physical Broadcast Channel of repeated link and/or the Physical Control Format Indicator Channel of the second repeated link; Time announcement module 104 notifies specifically for the Physical Control Format Indicator Channel by the first repeated link.
Preferably, in base station 100, the semi-static notification module of frequency 102 is specifically for the position of the Physical Downlink Control Channel Resource Block in a frequency direction that notifies repeated link in the subframe of one or more repeated link, wherein, have periodically between several repeated link subframes, time announcement module 104, specifically for notifying the OFDM symbol number that the Physical Downlink Control Channel of repeated link is shared on time orientation in the subframe of one or more repeated link, has between one or more repeated link subframe periodically.
Below the effect of base station 100 and each module is described in detail.Base station 100 specifically can also comprise to the informing physical downlink control channel method of repeated link:
Link between base station 100 and node is called repeated link.The OFDM symbol number of Physical Downlink Control Channel shared by time orientation of repeated link, the dynamic or semi-static notice node by time announcement module 104; The position of Resource Block in a frequency direction, by the semi-static notice node of the semi-static notification module of frequency 102.
The OFDM symbol number that the Physical Downlink Control Channel of repeated link is shared on time orientation is notified by base station 100 time announcement module 104 static state or is remained unchanged; The position of Resource Block in a frequency direction, the semi-static notification module of frequency 102 passes through the semi-static notice of Physical Broadcast Channel of repeated link, or, by the semi-static notice of the Physical Control Format Indicator Channel of second repeated link.
The OFDM symbol number of Physical Downlink Control Channel shared by time orientation of repeated link, the position of Resource Block in a frequency direction, the semi-static notice of Physical Broadcast Channel by repeated link, or, the semi-static notice of Physical Control Format Indicator Channel by first repeated link, or, the semi-static notice of the Physical Control Format Indicator Channel by second repeated link.
From above description, can find out, the invention solves the semi-static notice in position how making R-PDCCH PRBs in a frequency direction, and shared OFDM symbol number is dynamic on time orientation, semi-static, the problem of static notice, and then achieve and be applicable to base station well to via node link, advice method is flexible, both ensure that backwards compatibility (compatible LTE system), also the semi-static notice in position of R-PDCCH PRBs is in a frequency direction solved, and shared OFDM symbol number is dynamic on time orientation, semi-static, the effect of static notice.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. an informing physical downlink control channel method for repeated link, is characterized in that, comprising:
The position of the Physical Downlink Control Channel Resource Block in a frequency direction of repeated link adopts semi-static notice;
The OFDM symbol number shared on time orientation of the Physical Downlink Control Channel of described repeated link adopt in dynamic, semi-static and static notice one of;
Wherein, the position of Resource Block in a frequency direction adopts semi-static notice to comprise: adopt semi-static notice by the Physical Broadcast Channel of described repeated link and the Physical Control Format Indicator Channel of the second repeated link;
OFDM symbol number shared on time orientation adopt in dynamic, semi-static and static notice one of comprise: notified by the Physical Control Format Indicator Channel of the first repeated link;
Wherein, the Physical Control Format Indicator Channel of described repeated link maps one of in the following ways in a frequency direction:
When repeated link described Physical Control Format Indicator Channel and base station to the terminal links of version 8 or version 9 Physical Downlink Shared Channel shared by resource overlapping time, the data in described resource are punched; When described repeated link described Physical Control Format Indicator Channel and base station to the terminal links of version 10 Physical Downlink Shared Channel shared by resource overlapping time, described resource does not send data;
The same bandwidth of frequency band that the Physical Control Format Indicator Channel of described repeated link and the Physical Downlink Control Channel of repeated link comprise, and in the band width of the center frequency-band Resource Block of described frequency band uniform mapping;
The same bandwidth of frequency band that the Physical Control Format Indicator Channel of described repeated link and the Physical Downlink Control Channel of repeated link comprise, and in described frequency band uniform mapping.
2. method according to claim 1, is characterized in that,
Semi-static notice is adopted also to comprise by the Physical Broadcast Channel of described repeated link and the Physical Control Format Indicator Channel of the second repeated link:
The position of the Physical Downlink Control Channel notifying described repeated link in the subframe of one or more repeated link Resource Block in a frequency direction, wherein, has periodically between several repeated link subframes described,
OFDM symbol number shared on time orientation adopt in dynamic, semi-static and static notice one of also comprise:
In the subframe of one or more repeated link, notify between described one or more repeated link subframe, to have the OFDM symbol number that the Physical Downlink Control Channel of described repeated link is shared on time orientation periodically.
3. method according to claim 1, it is characterized in that, described semi-static notice is the position of the OFDM symbol number that notifies that in one or more repeated link subframe the Physical Downlink Control Channel of described repeated link is shared on time orientation and Resource Block in a frequency direction, wherein, have between described one or more repeated link subframe periodically.
4. according to the method in claim 2 or 3, it is characterized in that, described periodicity to refer in the time interval and number of sub-frames interval one of at least.
5. according to the method in any one of claims 1 to 3, it is characterized in that,
The raw information form that OFDM symbol number shared on described time orientation is corresponding can be: 1 bit, 2 bits, 3 bits or 4 bits;
The raw information form that in described frequency direction, the position of Resource Block is corresponding can be: the raw information form that in the descending control format that 1 bit, 2 bits, 3 bits, 4 bits or base station issue to the Physical Downlink Control Channel of terminal links, any one resource distribution mode is corresponding.
6. according to the method described in claim 5, it is characterized in that, described method also comprises, and encodes to raw information, and the encoder bit rate that described coding is corresponding is one of in 1/6,1/12,1/16,1/24 and 1/32.
7. according to the method described in claim 6, it is characterized in that, modulation system corresponding to the information after described coding is one of in quaternary PSK, 16 quadrature amplitude modulation and 64 quadrature amplitude modulation.
8. a base station, is characterized in that, comprising:
The semi-static notification module of frequency, for adopting semi-static notice to notify node to the position of Resource Block in a frequency direction;
Time announcement module, notifies described node for one of adopting in dynamic, semi-static and static notice shared OFDM symbol number on time orientation;
Wherein, the semi-static notification module of described frequency is specifically for notifying by the Physical Broadcast Channel of repeated link and the Physical Control Format Indicator Channel of the second repeated link;
Described time announcement module notifies specifically for the Physical Control Format Indicator Channel by the first repeated link;
Wherein, the Physical Control Format Indicator Channel of described repeated link maps one of in the following ways in a frequency direction:
When repeated link described Physical Control Format Indicator Channel and base station to the terminal links of version 8 or version 9 Physical Downlink Shared Channel shared by resource overlapping time, the data in described resource are punched; When described repeated link described Physical Control Format Indicator Channel and base station to the terminal links of version 10 Physical Downlink Shared Channel shared by resource overlapping time, described resource does not send data;
The same bandwidth of frequency band that the Physical Control Format Indicator Channel of described repeated link and the Physical Downlink Control Channel of repeated link comprise, and in the band width of the center frequency-band Resource Block of described frequency band uniform mapping;
The same bandwidth of frequency band that the Physical Control Format Indicator Channel of described repeated link and the Physical Downlink Control Channel of repeated link comprise, and in described frequency band uniform mapping.
9. base station according to claim 8, is characterized in that,
The semi-static notification module of described frequency is specifically for the position of the Physical Downlink Control Channel Resource Block in a frequency direction that notifies described repeated link in the subframe of one or more described repeated link, wherein, have periodically between several repeated link subframes described;
Described time announcement module, specifically for notifying the OFDM symbol number that the Physical Downlink Control Channel of described repeated link is shared on time orientation in the subframe of one or more repeated link, has between described one or more repeated link subframe periodically.
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| WO2012136254A1 (en) * | 2011-04-06 | 2012-10-11 | Nokia Siemens Networks Oy | Apparatus and method for communication |
| CN102905370B (en) * | 2011-07-26 | 2017-08-11 | 中兴通讯股份有限公司 | A kind of method and system for realizing control channel resource distribution |
| CN110838891B (en) * | 2012-08-03 | 2022-09-16 | 苹果公司 | Method, apparatus, and medium for uplink control information transmission |
| US9775134B2 (en) * | 2013-09-20 | 2017-09-26 | Samsung Electronics Co., Ltd. | System and method for coverage enhancements of broadcast channels |
| CN107733617B (en) * | 2016-08-12 | 2020-11-06 | 华为技术有限公司 | Reference signal mapping method and device |
| CN110121195B (en) * | 2018-02-05 | 2021-07-09 | 华为技术有限公司 | Relay transmission method and device |
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