CN103582031B - A kind of physical downlink control channel resource distribution method and equipment - Google Patents
A kind of physical downlink control channel resource distribution method and equipment Download PDFInfo
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- CN103582031B CN103582031B CN201210254402.5A CN201210254402A CN103582031B CN 103582031 B CN103582031 B CN 103582031B CN 201210254402 A CN201210254402 A CN 201210254402A CN 103582031 B CN103582031 B CN 103582031B
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a kind of physical downlink control channel PDCCH resource allocation methods and equipment, the method includes: to being in the community covering limitation scene, in the OFDM symbol shared by non-cell reference signals controlling territory in each descending sub frame of this community, a reserved PDCCH, and the arbitrary descending sub frame for this community, according to the priority needing to carry out the data of PDCCH resource distribution pre-set, determine that priority meets the data imposed a condition, and a described reserved PDCCH is distributed to the described priority determined meet the data imposed a condition.By technical scheme of the present invention, provide a kind of new PDCCH resource distribution method for being in the community covered under limitation scene, solve and only regulate PDCCH power or problem that only regulation cell reference signals power etc. cannot be effectively improved PDCCH covering power present in prior art.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of Physical Downlink Control Channel (Physical
Downlink Control Channel, PDCCH) resource allocation methods and equipment.
Background technology
Timesharing-Long Term Evolution (Time Division-Long Term Evolution, TD-LTE) system due to
Use multiple antennas reception technique so that its up channel covering power is stronger than down channel covering power, therefore
There will be the unbalanced problem of uplink downlink, and then covering can be caused to be limited to PDCCH.
At present, in order to strengthen the covering power of TD-LTE, being allowed to meet all kinds of covering demand, industry is often adopted
Improve the covering power of the PDCCH of TD-LTE with the following methods:
Mode one: use and improve cell reference signals (Cell-specific Reference Signals, CRS)
Launch the mode of power.
The degree of accuracy that channel is estimated can be improved owing to improving the transmitting power of CRS, thus can be necessarily
Reach to improve the effect of the covering power of PDCCH in degree.
But, need the transmitting of other subcarriers by means of the same time owing to improving the power of launching of CRS
Power, such as: due to CRS and PDCCH first OFDM in each subframe
It is frequency domain multiplexing on (Orthogonal Frequency Division Multiplexing, OFDM) symbol,
Therefore, the transmitting power improving CRS can reduce the transmitting power of the PDCCH in identical OFDM symbol,
The covering power of PDCCH can be reduced on the contrary to a certain extent；It addition, for the field of outdoor cover indoor
Scape, CRS launches the lifting of power can cause larger interference to the data of adjacent cell and control channel.
Mode two: use improve PDCCH control Channel Elements (Control Channel Element,
CCE) mode of the degree of polymerization.
Specifically, for meeting different channels and transmission demand, system can configure 4 kinds of different CCE
Polymerization methods carries out the transmission of PDCCH, the CCE polymerization of described 4 kinds of different CCE polymerization methodses
Degree is respectively 1,2,4 and 8, and i.e. one PDCCH can take 1,2,4 or 8 CCE, its
In, described CCE is a minimum PDCCH resource unit, and it is by 36 Resource Unit (Resources
Element, RE) composition.
CCE shared by PDCCH is the most, i.e. the degree of polymerization of the CCE of PDCCH is the highest, institute
State Signal to Interference plus Noise Ratio (the Signal to Interference plus that PDCCH can correctly be demodulated
Noise Ratio, SINR) thresholding the lowest, it is therefore possible to use improve PDCCH CCE polymerization
The mode of degree, is that the mode of 8 is to improve the covering power of PDCCH as used the CCE degree of polymerization.But,
Owing to PDCCH typically constitutes from by front 1-3 the OFDM symbol of each subframe, i.e. its shared physics money
Source is limited, say, that the thresholding of the SINR that described PDCCH can correctly be demodulated can not nothing
Limit reduces, and therefore, employing mode two still cannot preferably solve PDCCH and cover limited problem.
Mode three: use the mode improving PDCCH transmitting power.
Owing to PDCCH uses QPSK (Quadrature Phase Shift Keying, QPSK)
Mode be transmitted, therefore can launch by the way of power improve SINR by improving PDCCH,
And then reach to improve the effect of the covering power of PDCCH.
But, due to when improving the transmitting power of described PDCCH, need also exist for using in the same time it
The transmitting power of his subcarrier, the most only in identical OFDM symbol during available free subcarrier, could borrow
Launch power with it and improve the transmitting power of PDCCH, thus improve the transmitting power limited of PDCCH
Idle sub-carrier situation in identical OFDM symbol, further, owing to using in the same time other
When launching the transmitting power that power improves PDCCH of subcarrier, it will make the money for PDCCH
Source is reduced, and in causing every subframe, schedulable number of users reduces, thus can greatly affect the performance of system；
If it addition, only improve the transmitting power of PDCCH, then can cause because CRS launches underpower
PDCCH cannot correctly demodulate, and is still unable to reach the effect of the covering power improving PDCCH；
Further, during traditional adjustment PDCCH launches power, network side is it needs to be determined that and user
Between path loss information, power could be launched for the Cell Edge User higher PDCCH of distribution, wherein,
Described path loss information, only after uplink starts, could be passed through on timing-advance information or power
Rise space (power headroom) report to obtain, if user is in PDCCH and covers when being initially accessed
Lid limited situation, then can cause access failure owing to PDCCH covering is limited.For being in outdoor cover room
For the indoor user of interior scene, although the estimate of timing-advance information is less, network side thinks this user
Be not on cell edge, thus the PDCCH not improving this user launch power, but it practice, by
In the factor of penetration loss, but in order to cover, limited situation, i.e. demodulation performance are poor leads the PDCCH of this user
Cause cannot access system so that improve PDCCH transmitting power.Hence with carrying path loss information
The timing-advance information user to being initially accessed carry out PDCCH and launch the scheme that power adjusts and can not answer
For the scene that outdoor cover is indoor.
In sum, the CCE polymerization launching power, raising PDCCH of above-mentioned raising CRS is being used
When the mode launching power of degree or raising PDCCH improves the covering power of PDCCH, reached
Lifting effect the best.
Summary of the invention
Embodiments provide a kind of physical downlink control channel resource distribution method and equipment, in order to solve
The problem certainly improving the covering power poor effect of PDCCH present in prior art.
A kind of PDCCH resource distribution method, including:
To be in cover limitation scene community, in each descending sub frame of this community control territory non-little
In orthogonal frequency division multiplex OFDM symbol shared by district's reference signal CRS, a reserved PDCCH；
For arbitrary descending sub frame of this community, carry out PDCCH resource distribution according to needing of pre-setting
The priority of data, determine that priority meets the data imposed a condition, and by described reserved first
PDCCH distributes to the described priority determined and meets the data imposed a condition.
A kind of PDCCH resource distributing equipment, including:
PDCCH reserves module, for be in cover limitation scene community, this community each under
The orthogonal frequency division multiplex OFDM symbol shared by non-cell reference signals CRS controlling territory in row subframe
In, a reserved PDCCH；
Priority Determination module, for the arbitrary descending sub frame for this community, according to the needs pre-set
Carry out the priority of the data of PDCCH resource distribution, determine that priority meets the data imposed a condition；
PDCCH distributes module, for a described reserved PDCCH distributed to described determine excellent
First level meets the data imposed a condition.
The present invention has the beneficial effect that:
Embodiments provide a kind of PDCCH resource distribution method and equipment, be subject to for being in covering
The community of limit scene, the symbol of the OFDM shared by non-CRS controlling territory in each descending sub frame in this community
In number, a reserved PDCCH, and for arbitrary descending sub frame of this community, determine in this descending sub frame
Priority meets the needs imposed a condition and carries out the data of PDCCH resource distribution, by described reserved first
PDCCH distributes to the described priority determined and meets the data imposed a condition.By technology of the present invention
Scheme, provides a kind of new PDCCH resource distribution method for being in the community covered under limitation scene,
When arbitrary descending sub frame of this community exists the data that preecedence requirement carries out PDCCH resource distribution, excellent
First need the data carrying out PDCCH resource distribution to distribute reserved PDCCH for this, solve existing skill
Launching power or improving the CCE degree of polymerization or only of PDCCH of PDCCH is only regulated present in art
Regulation CRS launches the problem that power cannot be effectively improved PDCCH covering power.
Accompanying drawing explanation
Fig. 1 show PDCCH resource distribution method schematic flow sheet described in the embodiment of the present invention one；
Fig. 2 show the CRS power ascension simulation result schematic diagram on the impact of PDCCH demodulation performance；
Fig. 3 show PDCCH resource distributing equipment structural representation described in the embodiment of the present invention two.
Detailed description of the invention
The embodiment of the present invention is to improve the covering power of PDCCH in TD-LTE system, it is proposed that a kind of
PDCCH resource distribution method, specifically can apply in the covering limitation scene in TD-LTE system,
Wherein, described covering limitation scene can be divided into three kinds, is respectively as follows: (1), without covering the field of demand continuously
Scape；(2), MPS process only provides the scene that outdoor cover is indoor；Under this scene, owing to indoor penetrate
Loss is relatively big easily to be occurred covering limited phenomenon, simultaneously because other outdoor cell are done by the community set up
Disturb typically the least, be negligible, therefore, when carrying out the control of PDCCH power, can only need to examine
Consider the covering to indoor user.(3), community not only provide outdoor cover indoor, also provide for outdoor cover
Scene；Under this scene, there will be interference-limited phenomenon owing to indoor there will be covering limited phenomenon, outdoor,
Therefore, when carrying out the control of PDCCH power, not only need to consider the covering to indoor user, also want
Consider the disturbed condition to adjacent cell.
Below in conjunction with Figure of description, embodiments of the present invention is further illustrated, but the present invention is not limited to down
The embodiment in face.
Embodiment one:
As it is shown in figure 1, be PDCCH resource distribution method schematic flow sheet described in the embodiment of the present invention one,
Said method comprising the steps of:
Step 101: to being in the community covering limitation scene, the control in each descending sub frame of this community
In the OFDM symbol shared by non-CRS in territory processed, a reserved PDCCH.
Specifically, in this step 101, described in be in cover limitation scene community for be in nothing cover continuously
The community of lid demand scene, it is in and only provides the community of outdoor cover indoor scene or be in provide simultaneously
The indoor community with outdoor cover scene of outdoor cover；Specifically, network side (such as base station) can be by quiet
The mode of state configuration or by self-organizing network (Self-Organized Network, SON) Technique dynamic
Mode judges whether arbitrary community belongs to covering limitation scene, when described community belongs to covering limitation scene
Time, then PDCCH resource distribution method work as described in the embodiment of the present invention one.
Specifically, owing to, in row subframe in each of the lower, controlling territory and typically constituting from first 2 ~ 3 of this descending sub frame
OFDM symbol, meanwhile, on the premise of not sending CRS, controls territory and typically constitutes from using this descending sub frame
The 2nd, 3 OFDM symbol, therefore, in this step 101, can row subframe the most in each of the lower
In the non-CRS controlling territory OFDM symbol in, a reserved PDCCH.
It is preferred that for the thresholding reducing the SINR that a PDCCH can correctly be demodulated, described
The CCE degree of polymerization of one PDCCH can be configured so that higher numerical value (not less than the first threshold set,
Wherein, set first threshold can be determined according to actual conditions, and this is not limited in any way by the present invention),
The CCE degree of polymerization of a PDCCH is set to 8 as will be described, but it should be recognized that can also be by institute
The CCE degree of polymerization stating a PDCCH is set to other numerical value, and this is not made any limit by the embodiment of the present invention
Fixed；Simultaneously as the resource controlling the OFDM symbol of the non-CRS in territory in each descending sub frame is limited
, therefore, in this step 101, the number of the PDCCH reserved also is limited, such as,
The number of a described PDCCH can be set to 1, but it should be recognized that can also be by described
The number of one PDCCH is set to other numerical value, and this is not limited in any way by the embodiment of the present invention.
Further, if according to the band width configuration of community and active user's capacity, determining the residue controlling territory
RE disclosure satisfy that the demand of community user and cell system bandwidth are higher, such as larger than equal to 10MHZ(wherein
The CCE degree of polymerization be 8 a PDCCH take 288 RE, about 4.3MHZ bandwidth), then this
In step 101, it is also possible to the OFDM symbol shared by non-CRS controlling territory in each descending sub frame
Interior at least one the 2nd PDCCH reserved；It should be noted that described PDCCH-B is optional reserved,
Only multiple random access request is being had to occur or have multiple covering limited users and control what territory resource allowed
In the case of, network side (such as base station) dynamically configure.
Similarly, in order to reduce the thresholding of the SINR that the 2nd PDCCH can correctly be demodulated, described
The CCE degree of polymerization of two PDCCH can be configured so that higher numerical value (first threshold not less than setting),
The CCE degree of polymerization of the 2nd PDCCH is set to 8 as will be described, but it should be recognized that can also be by institute
The CCE degree of polymerization stating the 2nd PDCCH is set to other numerical value, and this is not made any limit by the embodiment of the present invention
Fixed；Simultaneously as the resource controlling the OFDM symbol of the non-CRS in territory in each descending sub frame is limited
, therefore, in this step 101, the number of the 2nd PDCCH reserved also is limited, such as,
The number of described 2nd PDCCH can be set to 1, but it should be recognized that can also be by described
The number of two PDCCH is set to other numerical value, and this is not limited in any way by the embodiment of the present invention.
Step 102: for arbitrary descending sub frame of this community, carries out PDCCH according to needing of pre-setting
The priority corresponding to data of resource distribution, determines that this descending sub frame medium priority meets the need imposed a condition
The data of PDCCH resource distribution to be carried out.
Specifically, the data institute needing to carry out PDCCH resource distribution can be pre-set in the following manner
Corresponding priority:
If described need the data carrying out PDCCH resource distribution for carrying cell system information, as system believe
Physical down Traffic Channel (the Physical of breath block (System Information Blocks, SIB) 1, SIB2 etc.
Downlink Shared Channel, PDSCH) data, then need to carry out PDCCH resource distribution by this
The priority of data be set to the highest, specifically, can be by the priority of data the highest for described priority
Value is set to A；
If the described data needing to carry out PDCCH resource distribution are new access or the user of switching Ru Gai community
Initial p DSCH data (such as the message2 information of random access procedure), then these needs are carried out
The priority of the data of PDCCH resource distribution is set to second highest, specifically, and can be by described priority time
The priority value of high data is set to B；
If the described non-initial needing to carry out the edge customer that data are this community of PDCCH resource distribution
PDSCH data, then need the priority carrying out the data of PDCCH resource distribution to be set to the 3rd this
Height, the most above-mentioned three kinds of data medium priorities are minimum, specifically, can be by data minimum for described priority
Priority value is set to C；Wherein, described A, B, C are any number, and A is more than more than B, B
C；It should be noted that the numerical value of described A levels off to the most infinite, the most under any circumstance, carry community
The priority of the PDSCH data of system information is the highest, it addition, the numerical value of described B, C can basis
Actual conditions specifically set or are adjusted at any time, and this is not limited in any way by the embodiment of the present invention.
More preferably, in this step 102, determined by priority meet the needs imposed a condition and carry out
The data of PDCCH resource distribution are in current downlink subframe, need to carry out the number of PDCCH resource distribution
According to the data that medium priority is the highest.It should be noted that the described number needing to carry out PDCCH resource distribution
According to in current downlink subframe, not yet carried out the data of PDCCH resource distribution.
Specifically, in this step 102, can determine in the following manner and be currently needed for carrying out PDCCH
The data of the data medium priority satisfied impose a condition (priority is the highest) of resource distribution:
Determine present in this descending sub frame that several need to carry out the data of PDCCH resource distribution successively
Priority value, and after determining priority value, using data the highest for preferred value as the priority finally determined
Meet the data imposed a condition.
Such as: if 3 data needing to carry out PDCCH resource distribution of existence in this descending sub frame, and institute
State three data and can be expressed as data A, data B and data C, then need to determine successively this three
The priority value of individual data, such as, if data A are the PDSCH data carrying cell system information, then
The priority value determining these data A is A, if data B are new access or the user of switching Ru Gai community
Initial p DSCH data, it is determined that the priority value of these data B is B, if data C are the limit of this community
The non-initial PDSCH data of edge user, it is determined that the priority value of these data C is C, and is determining number
After priority value according to A, data B and data C, relatively described data A, data B and data C
The size of priority value, due to priority value A > priority value B > priority value C, therefore, the most really
The data of fixed priority value the highest (priority is satisfied to impose a condition) are to carry cell system information
PDSCH data.
Further, divide owing to needing of pre-setting in the embodiment of the present invention one carries out PDCCH resource
The priority orders corresponding to data joined is followed successively by: carry the PDSCH data of cell system information, new
Access or the switching initial p DSCH data of user of Ru Gai community, the non-initial of edge customer of this community
PDSCH data, therefore, in this step 102, if in current downlink subframe, carrying cell system
The PDSCH data of information need transmission, and the most described priority determined meets the needs imposed a condition and carries out
The data of PDCCH resource distribution are the PDSCH data carrying cell system information；If current downlink subframe
In, the PDSCH data not carrying cell system information need transmission to have initial p DSCH data to need
Transmitting, the most described priority determined meets the needs imposed a condition and carries out the number of PDCCH resource distribution
According to for initial p DSCH data；If in current downlink subframe, the most do not carry cell system information
PDSCH data need transmission, also do not have initial p DSCH data to need transmission to have the non-of edge customer
Initial p DSCH data need transmission, and the most described priority determined meets the needs imposed a condition and carries out
The non-initial PDSCH data that data are edge customer of PDCCH resource distribution.
If it should be noted that in current downlink subframe, not carrying the PDSCH of cell system information
Data need transmission, but have multiple user newly to access or fresh cut changes to this community, i.e. current for this community
For descending sub frame, the data needing to carry out PDCCH resource distribution that there is multiple priority second highest are (new
The initial p DSCH data of the user of access or switching Ru Gai community), then need to connect according to the plurality of user
The initial p DSCH data of the plurality of user are carried out by the time order and function order of Ru Gai community or random fashion etc.
Correspondingly prioritization, and ensure the priority value of the initial p DSCH data of the multiple users after sequence
Different, and all between A and B；
Similarly, if in current downlink subframe, do not carry the PDSCH data of cell system information with
And the initial p DSCH data of the user newly accessing or switching Ru Gai community need transmission, but there is multiple edge
The non-initial PDSCH data of user need transmission, then need to carry out according to the request of the plurality of edge customer
Non-to the plurality of edge customer of the time order and function order of non-initial PDSCH data transmission or random fashion etc.
Initial p DSCH data carry out correspondingly prioritization, and ensure the non-of the multiple edge customers after sequence
The priority value of initial p DSCH data is different and all between B and C.
Step 103: a described reserved PDCCH is distributed to the described priority determined and meets setting
Condition need to carry out the data of PDCCH resource distribution.
Specifically, if priority determined by a step 102 meets the needs imposed a condition and carries out PDCCH
The data of resource distribution are the PDSCH data carrying cell system information, then by described reserved first
PDCCH distributes to this PDSCH data carrying cell system information；If priority determined by is satisfied to be set
The data needing to carry out PDCCH resource distribution of fixed condition are initial p DSCH data, then by described pre-
The PDCCH stayed distributes to this initial p DSCH data；If priority determined by meets setting bar
Part need to carry out the non-initial PDSCH data that data are edge customer of PDCCH resource distribution, then
A described reserved PDCCH is distributed to the non-initial PDSCH data of this edge customer.
It should be noted that carry out owing to priority determined by step 102 meets the needs imposed a condition
PDCCH resource distribution data be the data that priority is the highest, i.e. determined by priority meet set bar
The number carrying out the data of PDCCH resource distribution that needs of part is unique, therefore, in this step 103
In, only any one PDCCH in a described reserved PDCCH need to be distributed to described really
Fixed priority meets the needs imposed a condition and carries out the data of PDCCH resource distribution.
In addition, it is necessary to explanation, in this step 103, by a described reserved PDCCH distribution
Meet, to the described priority determined, the needs imposed a condition to carry out the data of PDCCH resource distribution and be profit
Indicate the described priority determined to meet the needs imposed a condition with a described reserved PDCCH to carry out
PDCCH resource distribution data be transmitted or use a described reserved PDCCH carry out described really
Fixed priority meets the scheduling that the needs imposed a condition carry out the data transmission of PDCCH resource distribution.
Step 104: judge in current downlink subframe, if there is residue the oneth PDCCH, the most then
Jump to step 102, otherwise, perform step 105.
Specifically, if in a step 101, the number of the PDCCH reserved is 1, then due to
In step 103, this unique PDCCH is allocated to the priority determined and has met setting article
The data of part, therefore in this step 104, can jump directly to step 105；If in a step 101,
The number of the PDCCH reserved is more than 1, then need to jump to step 102, and again according in advance
The priority needing to carry out corresponding to the data of PDCCH resource distribution first arranged, determines this descending sub frame
Medium priority meets the data being currently needed for carrying out PDCCH resource distribution imposed a condition, and by described
The priority that any one PDCCH in a remaining PDCCH distributes to determine meets setting
Condition need to carry out the data of PDCCH resource distribution, and perform above-mentioned judgement successively, determine and point
The step such as join, until being assigned by a described reserved PDCCH.
Step 105: by current downlink subframe remaining need the data carrying out PDCCH resource distribution by
It is ranked up according to priority order from high to low, and is followed successively by each data distribution the 2nd PDCCH, until
The 2nd PDCCH reserved in this descending sub frame is allocated complete.
Specifically, remaining in described current downlink subframe the data carrying out PDCCH resource distribution are needed to be
Remaining data needing to carry out PDCCH resource distribution in addition to the data of distribution the oneth PDCCH.
Specifically, in this step 105, remaining needs in current downlink subframe is being carried out PDCCH
After the data of resource distribution are ranked up according to priority order from high to low, need according to reserved second
Number N of PDCCH, for being arranged in the remaining number needing to carry out PDCCH resource distribution of top N
According to being sequentially allocated the 2nd PDCCH, wherein, described N is positive integer.
Step 106: judge in current downlink subframe, if there is a unassigned PDCCH and second
PDCCH needs to carry out the data of PDCCH resource distribution, the most then perform step 107, otherwise,
Perform step 108.
Step 107: improve data preferential of a described unassigned PDCCH and the 2nd PDCCH
Level, and need to carry out PDCCH resource distribution in a rear descending sub frame using the data after priority raising
Data carry out the distribution of PDCCH resource.
Specifically, if determining in step 106 and there is a unassigned PDCCH and the 2nd PDCCH
Need to carry out the data of PDCCH resource distribution, then the resource of PDCCH in explanation current downlink subframe
Deficiency, therefore, in order to the needs for a described unassigned PDCCH and the 2nd PDCCH enter
The data of row PDCCH resource distribution are assigned to a PDCCH or the 2nd PDCCH, need to be postponed
The competition of PDCCH resource is carried out to later descending sub frame.
Further, by a PDCCH's and the 2nd PDCCH unassigned in current downlink subframe
Data delay to before the competition carrying out PDCCH resource in later descending sub frame, need to improve described in not
The priority of the data of an allocated PDCCH and the 2nd PDCCH, such as, is the most once prolonging
Chi Shi, can add the priority value of the data of a described unassigned PDCCH and the 2nd PDCCH
1, thus reduce to a certain extent due to by a PDCCH unassigned in current downlink subframe and
The data delay of the 2nd PDCCH to when later descending sub frame carries out the competition of PDCCH resource, institute
The access introduced or propagation delay time.
Such as, if the data of a unassigned PDCCH and the 2nd PDCCH are in current downlink subframe
The non-initial PDSCH data of edge customer, (priority value of its correspondence is C), then it is being delayed to
When later descending sub frame carries out the competition of PDCCH resource, the priority value of its correspondence can be improved
To C+1, if the non-initial PDSCH data of described edge customer are the most competing in this later descending sub frame
Strive PDCCH resource, then need to be delayed to down in next descending sub frame continue competition PDCCH money
Source, at this point it is possible to the priority value of its correspondence is brought up to C+2, if now, next descending sub frame under this
In there is not priority value and need to carry out the competition of PDCCH resource more than the data of C+2, then this edge is used
The non-initial PDSCH data at family i.e. can be assigned to the first PDCCH resource, thus utilizes described first
PDCCH completes the transmission of these non-initial PDSCH data, and then avoids the occurrence of the non-initial of edge customer
The long phenomenon even interrupting service of PDSCH data transmission delay.
It should be noted that after priority value changes, in current downlink subframe unassigned first
The priority value of the data of PDCCH and the 2nd PDCCH can be more than later or rear several descending sub frame
Medium priority value is the data (the initial p DSCH data of the user of new access or switching Ru Gai community) of B,
But all the time cannot be more than the data (carrying the PDSCH data of cell system information) that priority value is A.
Further, if in descending sub frame described in a step 102, existing in a descending sub frame and prolong
During the data of a belated unassigned PDCCH and the 2nd PDCCH, then in determining step 102
When this descending sub frame medium priority meets the data that the needs imposed a condition carry out PDCCH resource distribution, also
A described upper descending sub frame will postpone a next unassigned PDCCH's and the 2nd PDCCH
Data are taken into account.Specifically, if a described upper descending sub frame postpones unassigned first come
The non-initial PDSCH data of the edge customer that data are this community of PDCCH and the 2nd PDCCH, then
The priority value C needing the non-initial PDSCH data of the edge customer by postponing Lai Gai community is changed to
C+1, and utilize the priority value after change to carry out with other needs in this current downlink subframe in step 102
The priority value of the data of PDCCH resource distribution compares, and imposes a condition so that it is determined that priority meets
Need to carry out the data of PDCCH resource distribution.
Step 108: terminate needing the data carrying out PDCCH resource distribution to carry out in current downlink subframe
The operation of PDCCH resource distribution.
It should be noted that in the embodiment of the present invention one, while PDCCH is carried out resource distribution,
Also need to cover the feature of limitation scene, the CRS power ascension (CRS to this community according to each community difference
Power boosting) the transmitting power of numerical value and a PDCCH and the 2nd PDCCH adjusts accordingly
Whole.
Specifically, if this community is for being in without covering demand scene continuously or only providing outdoor cover indoor scene
Community, then need to meet the number imposed a condition a PDCCH is distributed to the described priority determined
According to before, the CRS promoting this community according to the CRS power boosting numerical value set launches power,
More preferably, a described CRS power boosting numerical value is 6dB, it should be noted that described first
CRS power boosting numerical value can also be other numerical value, and this is not limited in any way by the embodiment of the present invention.
If this community is for providing outdoor cover the indoor community with outdoor cover scene simultaneously, then need by the
One PDCCH distributes to before the described priority determined meets the data imposed a condition, according to the set
Two CRS power boosting numerical value promote the CRS of this community and launch power；More preferably, described second
CRS power boosting numerical value is 3dB, but it should be recognized that described 2nd CRS power boosting
Numerical value can also be other numerical value, and this is not limited in any way by the embodiment of the present invention.
Further, after a reserved PDCCH, and a PDCCH is distributed to described really
Before fixed priority meets the data imposed a condition, in addition it is also necessary to by the transmitting power than the CRS after improving
The transmitting power of the Second Threshold of low setting is as the transmitting power of a PDCCH；And, reserved the
After two PDCCH, and the 2nd PDCCH is distributed to the described priority determined meet impose a condition
Data before, need the transmitting merit of Second Threshold launching the low setting of power than the CRS after improving
Rate is as the transmitting power of the 2nd PDCCH.
It should be noted that CRS power boosting as shown in Figure 2 is to PDCCH demodulation performance,
Simulation result schematic diagram such as the impact of signal to noise ratio (snr) understands, and CRS launches the lifting of power with described
The relative power that CRS launches power and PDCCH launches power is relevant, such as: when the transmitting merit of CRS
During the rate high 3dB of transmitting power than PDCCH, it is the most obvious that the demodulation performance of PDCCH promotes effect,
Therefore, in the embodiment of the present invention one, the Second Threshold of described setting can be set to 3dB, but need
Illustrating, the Second Threshold of described setting can also be other numerical value, and this is not appointed by the embodiment of the present invention
What limits.
The embodiment of the present invention one provides a kind of PDCCH resource distribution method, in the method, first pin
The non-CRS institute controlling territory to being in the community covering limitation scene, in each descending sub frame in this community
In the OFDM symbol taken, a reserved PDCCH, and for arbitrary descending sub frame of this community, root
According to the priority needing to carry out the data of PDCCH resource distribution pre-set, determine in this descending sub frame
Priority meets the needs imposed a condition and carries out the data of PDCCH resource distribution, and by described reserved
One PDCCH distributes to the described priority determined and meets the data imposed a condition, and wherein said priority is full
The data that foot imposes a condition are the data that priority is the highest.
The data institute needing to carry out PDCCH resource distribution owing to pre-setting in embodiments of the present invention is right
The priority orders answered is followed successively by: carry cell system information PDSCH data, newly access or switch into
The initial p DSCH data of the user of this community, the non-initial PDSCH data of edge customer of this community,
Therefore, by PDCCH resource distribution method described in the embodiment of the present invention, cell system can carried
The PDSCH data of information need in the descending sub frame of transmission, the described reserved PDCCH of preferential use
Carry out the scheduling of cell system information transmission, do not carry the PDSCH data needs of cell system information
Transmission and have initial p DSCH data to need in the descending sub frame of transmission, preferential use described reserved first
PDCCH carries out the scheduling of initial p DSCH data transmission, and is not the most carrying cell system information
PDSCH data need transmission, also do not have initial p DSCH data to need transmission to have the non-of edge customer
Initial p DSCH data need in the descending sub frame of transmission, the described reserved PDCCH of preferential use
Carry out the scheduling of the non-initial PDSCH data transmission of edge customer.It addition, the embodiment of the present invention is right
While PDCCH carries out resource distribution, cover the feature of limitation scene always according to different districts, to CRS
The transmitting power of power boosting numerical value and a reserved PDCCH or the 2nd PDCCH is carried out
Corresponding adjust, thus solve and only regulate the transmitting power of PDCCH present in prior art or improve
The CCE degree of polymerization of PDCCH or only regulate the transmitting power of CRS and cannot be effectively improved PDCCH and cover
The problem of ability.
Embodiment two:
As it is shown on figure 3, be the structural representation of PDCCH resource distributing equipment described in the embodiment of the present invention two
Figure, described PDCCH resource distributing equipment can be the collection being integrated in the equipment (such as base station) of network side
Forming apparatus or be arranged on the autonomous device of network side, this is not limited in any way by the embodiment of the present invention, described
PDCCH resource distributing equipment include PDCCH reserve module 11, Priority Determination module 12 and
PDCCH distributes module 13, wherein:
Described PDCCH reserves module 11 for being in the community covering limitation scene, every in this community
In the OFDM symbol shared by non-CRS controlling territory in individual descending sub frame, a reserved PDCCH；
Specifically, described PDCCH reserves targeted being in of module 11 and covers the community of limitation scene for being in nothing
Cover the community of demand scene continuously, the community of only offer outdoor cover indoor scene is provided or is in together
Time provide outdoor cover the indoor community with outdoor cover scene；It is preferred that in order to reduce a PDCCH
The thresholding of the SINR that can be correctly demodulated, the CCE degree of polymerization of a described PDCCH can be set
For higher numerical value (first threshold not less than setting), as will be described the CCE polymerization of a PDCCH
Degree is set to 8, but it should be recognized that can also the CCE degree of polymerization of a described PDCCH be arranged
For other numerical value, this is not limited in any way by the embodiment of the present invention；Simultaneously as each descending sub frame is controlled
The resource of the OFDM symbol of the non-CRS in territory processed is limited, and therefore, described PDCCH reserves module
The number of 11 PDCCH reserved also is limited, for example, it is possible to by a described PDCCH
Number be set to 1, but it should be recognized that the number of a described PDCCH can also be set to
Other numerical value, this is not limited in any way by the embodiment of the present invention.
Described Priority Determination module 12 is for the arbitrary descending sub frame for this community, according to pre-setting
Need to carry out the priority of the data of PDCCH resource distribution, determine that priority meets the number imposed a condition
According to；Specifically, priority determined by described Priority Determination module 12 meets the data imposed a condition and is
In current downlink subframe, the data that the data medium priority that needs to carry out PDCCH resource distribution is the highest, enter
One step ground, described Priority Determination module 12 can determine in the following manner and is currently needed for carrying out
The data medium priority of PDCCH resource distribution meets the data imposed a condition: determine this descending sub frame successively
Present in several priority values needing to carry out the data of PDCCH resource distribution, and preferential determining
After level value, data the highest for preferred value are met, as the priority finally determined, the data imposed a condition.
Described PDCCH distribution module 13 described determines for being distributed to by a described reserved PDCCH
Priority meet the data imposed a condition；It should be noted that described PDCCH distribution module 13 will
A described reserved PDCCH distributes to the described priority determined and meets the needs imposed a condition and carry out
The data of PDCCH resource distribution be utilize a described reserved PDCCH instruction described determine excellent
First level meets the needs imposed a condition and carries out the data of PDCCH resource distribution and be transmitted.
Further, described PDCCH resource distributing equipment also includes that priority arranges module 14:
Described priority arranges module 14 for described needing the data carrying out PDCCH resource distribution to be
When carrying the physical down Traffic Channel PDSCH data of cell system information, need to carry out PDCCH by this
The priority of the data of resource distribution is set to the highest, when the described number needing to carry out PDCCH resource distribution
Access or during the initial p DSCH data of user of switching Ru Gai community according to for new, these needs are carried out
The priority of the data of PDCCH resource distribution is set to second highest, and ought described need to carry out PDCCH
During the non-initial PDSCH data of the edge customer that data are this community of resource distribution, these needs are carried out
The priority of the data of PDCCH resource distribution is set to the 3rd height, and (i.e. the medium priority of three is set to
Low).Specifically, described priority module 14 is set can be by the priority of data the highest for described priority
Value is set to A, and the priority value of data second highest for described priority is set to B, and by described preferentially
The priority value of the data that level is minimum is set to C, and wherein, described A, B, C are any number, and A
More than B, B more than C；It should be noted that the numerical value of described A levels off to the most infinite.
Further, described PDCCH reserves the control that module 11 is additionally operable in each descending sub frame of this community
At least one the 2nd PDCCH reserved in the OFDM symbol shared by non-CRS in territory processed；Described preferentially
Level determines that module 12 is additionally operable to the arbitrary descending sub frame for this community, it would be desirable to carry out PDCCH resource
In the data of distribution, the remainder data in addition to the data of distribution the oneth PDCCH is according to priority from high to low
Order be ranked up；Described PDCCH distribution module 13 is additionally operable at described Priority Determination module 12
By remaining in the data needing to carry out PDCCH resource distribution, in addition to the data of distribution the oneth PDCCH
After data are ranked up, it is followed successively by each data distribution the 2nd PDCCH, until reserved in this descending sub frame
The 2nd PDCCH be allocated complete.
Specifically, in order to reduce the thresholding of the SINR that the 2nd PDCCH can correctly be demodulated, described
PDCCH reserves the CCE degree of polymerization of the 2nd PDCCH that module 11 is reserved and can be configured so that higher
Numerical value (more than set threshold value numerical value), the CCE degree of polymerization of the 2nd PDCCH is set to as will be described
8, but it should be recognized that the CCE degree of polymerization of described 2nd PDCCH can also be set to other number
Value, this is not limited in any way by the embodiment of the present invention；Simultaneously as each descending sub frame controls the non-of territory
The resource of the OFDM symbol of CRS is limited, and therefore, described PDCCH reserves module 11 and reserved
The number of the 2nd PDCCH be also limited, for example, it is possible to the number of described 2nd PDCCH is set
It is set to 1, but it should be recognized that the number of described 2nd PDCCH can also be set to other numerical value,
This is not limited in any way by the embodiment of the present invention.
Further, described PDCCH resource distributing equipment also includes priority change module 15:
Described priority change module 15 is used for improving in the data needing to carry out PDCCH resource distribution,
The priority of the data of a unassigned PDCCH and the 2nd PDCCH；Described PDCCH distributes mould
The data that block 13 is additionally operable to after described priority being improved need to carry out PDCCH in a rear descending sub frame
The data of resource distribution carry out the distribution of PDCCH resource.
Specifically, described priority change module 15 can be in current downlink subframe unassigned first
When the data of PDCCH and the 2nd PDCCH often carry out time lag of first order, by described unassigned first
The priority value of the data of PDCCH and the 2nd PDCCH adds 1, thus reduce to a certain extent due to
By the data delay of a PDCCH and the 2nd PDCCH unassigned in current downlink subframe to later
When descending sub frame carries out the competition of PDCCH resource, introduced access or propagation delay time.
Further, described PDCCH resource distributing equipment also includes power setting module 16:
Described power setting module 16 is for when this community is for being in without covering demand scene continuously or only providing
During the community of outdoor cover indoor scene, in described PDCCH distribution module 13 by a reserved PDCCH
Before the priority distributing to determine meets the data imposed a condition, according to the 2nd CRS power set
Boosting numerical value promotes the CRS of this community and launches power, when this community is for providing outdoor cover indoor simultaneously
During with the community of outdoor cover scene, in described PDCCH distribution module 13 by a reserved PDCCH
Before the priority distributing to determine meets the data imposed a condition, according to the 2nd CRS power set
Boosting numerical value promotes the CRS of this community and launches power, and it is reserved to reserve module 11 at PDCCH
After oneth PDCCH, and PDCCH distribution module 13 distribute to a PDCCH to determine excellent
Before first level meets the data imposed a condition, by second of the transmitting low setting of power than the CRS after improving
The transmitting power of threshold value is as the transmitting power of a PDCCH.More preferably, described 2nd CRS power
Boosting numerical value is 6dB, described 2nd CRS power boosting numerical value and the Second Threshold of setting
It is respectively 3dB, but it should be recognized that described 2nd CRS power boosting numerical value, the 2nd CRS
The Second Threshold of power boosting numerical value and setting can also be other numerical value, the embodiment of the present invention pair
This is not limited in any way.
Further, described power setting module 16 is additionally operable to reserve module 11 at PDCCH and reserves second
After PDCCH, and PDCCH distribution module 13 the 2nd PDCCH distributed to described determine excellent
Before first level meets the data imposed a condition, by second of the transmitting low setting of power than the CRS after improving
The transmitting power of threshold value is as the transmitting power of the 2nd PDCCH.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (14)
1. a physical downlink control channel PDCCH resource allocation methods, it is characterised in that including:
To be in cover limitation scene community, in each descending sub frame of this community control territory non-little
In orthogonal frequency division multiplex OFDM symbol shared by district's reference signal CRS, a reserved PDCCH；
For arbitrary descending sub frame of this community, carry out PDCCH resource distribution according to needing of pre-setting
The priority of data, determine that priority meets the data imposed a condition, and by described reserved first
PDCCH distributes to the described priority determined and meets the data imposed a condition, wherein, in the following manner
The priority needing to carry out the data of PDCCH resource distribution is set: if described needs carries out PDCCH money
The data of source distribution are the physical down Traffic Channel PDSCH data carrying cell system information, then should
The priority carrying out the data of PDCCH resource distribution is needed to be set to the highest；If described needs are carried out
The data of PDCCH resource distribution are the initial p DSCH data of the user of new access or switching Ru Gai community,
Then the priority carrying out the data of PDCCH resource distribution is needed to be set to second highest this；If described need into
The non-initial PDSCH data of the edge customer that data are this community of row PDCCH resource distribution, then will
It is high that this needs the priority carrying out the data of PDCCH resource distribution to be set to the 3rd.
2. PDCCH resource distribution method as claimed in claim 1, it is characterised in that described method
Also include:
Reserve in the OFDM symbol shared by non-CRS controlling territory in each descending sub frame of this community
At least one the 2nd PDCCH；
For arbitrary descending sub frame of this community, distribute to a described reserved PDCCH described determine
Priority meet the data imposed a condition after, described method also includes:
By in the data needing to carry out PDCCH resource distribution, in addition to the data of distribution the oneth PDCCH
Remainder data is ranked up according to priority order from high to low, and is followed successively by each data distribution second
PDCCH, until the 2nd PDCCH reserved in this descending sub frame is allocated complete.
3. PDCCH resource distribution method as claimed in claim 2, it is characterised in that
The CCE degree of polymerization of a described PDCCH or the 2nd PDCCH is not less than the first threshold set.
4. PDCCH resource distribution method as claimed in claim 2, it is characterised in that described method
Also include:
Improve in the data needing to carry out PDCCH resource distribution, a unassigned PDCCH and second
The priority of the data of PDCCH, and the data after priority raising are needed in a rear descending sub frame
The data carrying out PDCCH resource distribution carry out the distribution of PDCCH resource.
5. PDCCH resource distribution method as claimed in claim 1, it is characterised in that
Described priority meets the data imposed a condition: the data that priority is the highest.
6. the PDCCH resource distribution method as described in Claims 1 to 5 is arbitrary, it is characterised in that
Described it is in that to cover the community of limitation scene be to be in without covering continuously the community of demand scene, being in and carry
Supply the community of outdoor cover indoor scene or be in the community providing outdoor cover indoor with outdoor cover scene.
7. PDCCH resource distribution method as claimed in claim 6, it is characterised in that
During in this community for being in without covering demand scene continuously or providing the community of outdoor cover indoor scene,
Oneth PDCCH is being distributed to before the described priority determined meets the data imposed a condition, described side
Method also includes:
According to the CRS power ascension CRS power boosting numerical value set, the CRS to this community
Launch power to promote；
During in this community for providing outdoor cover indoor community with outdoor cover scene, by first
PDCCH distributes to before the described priority determined meets the data imposed a condition, and described method also includes:
According to the 2nd CRS power boosting numerical value set, the CRS transmitting power of this community is carried out
Promote；
After a reserved PDCCH, and a PDCCH is being distributed to the described priority determined
Before meeting the data imposed a condition, described method also includes:
Using the transmitting power of the Second Threshold launching the low setting of power than the CRS after improving as first
The transmitting power of PDCCH.
8. a physical downlink control channel PDCCH resource allocation apparatus, it is characterised in that including:
PDCCH reserves module, for be in cover limitation scene community, this community each under
The orthogonal frequency division multiplex OFDM symbol shared by non-cell reference signals CRS controlling territory in row subframe
In, a reserved PDCCH；
Priority Determination module, for the arbitrary descending sub frame for this community, according to the needs pre-set
Carry out the priority of the data of PDCCH resource distribution, determine that priority meets the data imposed a condition；
PDCCH distributes module, for a described reserved PDCCH distributed to described determine excellent
First level meets the data imposed a condition；
Priority arranges module, for the data carrying out PDCCH resource distribution described ought be needed little for carrying
During the physical down Traffic Channel PDSCH data of sound zone system information, need to carry out PDCCH resource by this
The priority of data of distribution is set to the highest, needs the data carrying out PDCCH resource distribution to be when described
New access or during the initial p DSCH data of user of switching Ru Gai community, need to carry out PDCCH by this
The priority of the data of resource distribution is set to second highest, and ought described need to carry out PDCCH resource distribution
The non-initial PDSCH data of the edge customer that data are this community time, need to carry out PDCCH by this
It is high that the priority of the data of resource distribution is set to the 3rd.
9. PDCCH resource distributing equipment as claimed in claim 8, it is characterised in that
Described PDCCH reserves module, and be additionally operable in each descending sub frame of this community controls the non-of territory
At least one the 2nd PDCCH reserved in OFDM symbol shared by CRS；
Described Priority Determination module, is additionally operable to the arbitrary descending sub frame for this community, it would be desirable to carry out
In the data of PDCCH resource distribution, the remainder data in addition to the data of distribution the oneth PDCCH is according to excellent
First level order from high to low is ranked up；
Described PDCCH distributes module, is additionally operable to, at described Priority Determination module, needs are carried out PDCCH
In the data of resource distribution, after the remainder data in addition to the data of distribution the oneth PDCCH is ranked up,
It is followed successively by each data distribution the 2nd PDCCH, until the 2nd PDCCH reserved in this descending sub frame is divided
Join complete.
10. PDCCH resource distributing equipment as claimed in claim 9, it is characterised in that
Described PDCCH reserves a PDCCH or the CCE polymerization of the 2nd PDCCH that module is reserved
Degree is not less than the first threshold set.
11. PDCCH resource distributing equipments as claimed in claim 9, it is characterised in that described PDCCH
Resource allocation apparatus also includes priority change module:
Described priority change module, for improving in the data needing to carry out PDCCH resource distribution, not
The priority of the data of an allocated PDCCH and the 2nd PDCCH；
Described PDCCH distributes module, is additionally operable to the data after described priority being improved as rear one descending
Subframe need the data carrying out PDCCH resource distribution carry out the distribution of PDCCH resource.
12. PDCCH resource distributing equipments as claimed in claim 8, it is characterised in that
The priority that described Priority Determination module determines meets the data imposed a condition: priority is the highest
Data.
13. as arbitrary in claim 8～12 as described in PDCCH resource distributing equipment, it is characterised in that
The community covering limitation scene that is in that described PDCCH reserves module targeted is covered continuously for being in nothing
The community of lid demand scene, it is in the community of outdoor cover indoor scene to be provided or offer outdoor is provided and covers
The indoor community with outdoor cover scene of lid.
14. PDCCH resource distributing equipments as claimed in claim 13, it is characterised in that described PDCCH
Resource allocation apparatus also includes power setting module:
Described power setting module, for when this community is for being in without covering demand scene continuously or providing outdoor
When covering the community of indoor scene, in described PDCCH distribution module by a reserved PDCCH distribution
Before meeting the data imposed a condition to the priority determined, according to the CRS power ascension CRS set
Power boosting numerical value, promotes the CRS transmitting power of this community, when this community is to provide room
Outer when covering the indoor community with outdoor cover scene, in described PDCCH distribution module by reserved first
Before the priority that PDCCH distributes to determine meets the data imposed a condition, according to the 2nd CRS set
Power boosting numerical value, promotes the CRS transmitting power of this community；And,
Reserve after module reserves a PDCCH at PDCCH, and in PDCCH distribution module by the
Before the priority that one PDCCH distributes to determine meets the data imposed a condition, by than the CRS after improving
The Second Threshold launching the low setting of power launch power as the transmitting power of a PDCCH.
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| WO2016121581A1 (en) * | 2015-01-29 | 2016-08-04 | シャープ株式会社 | Terminal device, base station device, communications method, and integrated circuit |
| US10285107B2 (en) | 2016-09-08 | 2019-05-07 | Apple Inc. | Dynamic coverage mode switching and communication bandwidth adjustment |
| CN110138536B (en) * | 2019-06-11 | 2022-02-08 | 深圳市锐尔觅移动通信有限公司 | Method and device for sending physical downlink control channel and storage medium |
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| CN101815355A (en) * | 2009-02-25 | 2010-08-25 | 大唐移动通信设备有限公司 | Method and device for downlink scheduling |
| CN102143593A (en) * | 2011-03-25 | 2011-08-03 | 电信科学技术研究院 | Combined adaptive resource allocation method and device for PDCCH (Physical Downlink Control Channel) |
| CN102210181A (en) * | 2008-11-07 | 2011-10-05 | 株式会社Ntt都科摩 | Wireless base station |
| CN102404853A (en) * | 2011-06-29 | 2012-04-04 | 电信科学技术研究院 | Method and equipment for sending PDCCH (physical Downlink control channel) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102210181A (en) * | 2008-11-07 | 2011-10-05 | 株式会社Ntt都科摩 | Wireless base station |
| CN101815355A (en) * | 2009-02-25 | 2010-08-25 | 大唐移动通信设备有限公司 | Method and device for downlink scheduling |
| CN102143593A (en) * | 2011-03-25 | 2011-08-03 | 电信科学技术研究院 | Combined adaptive resource allocation method and device for PDCCH (Physical Downlink Control Channel) |
| CN102404853A (en) * | 2011-06-29 | 2012-04-04 | 电信科学技术研究院 | Method and equipment for sending PDCCH (physical Downlink control channel) |
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