CN101252783A - Resource allocation method - Google Patents
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- CN101252783A CN101252783A CNA2008100905338A CN200810090533A CN101252783A CN 101252783 A CN101252783 A CN 101252783A CN A2008100905338 A CNA2008100905338 A CN A2008100905338A CN 200810090533 A CN200810090533 A CN 200810090533A CN 101252783 A CN101252783 A CN 101252783A
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Abstract
The invention relates to a resource allocation method. A base station utilizes a control channel unit of a physical downlink control channel to transmit control signaling related to the downstream data to a mobile terminal; after the mobile terminal receives the control signaling, the mobile terminal obtains virtual resource block index mapped by the corresponding physical uplink response control channel, and physical uplink reply control channel index which is determined by mapped circulating motion amount index and time domain orthogonal code index in the virtual resource block according to the index of the control channel unit, and the set mapping method; the mobile terminal returns positive/negative acknowledgement control signaling on the physical uplink response control channel to the base station; when the set mapping method ensures the physical uplink response control channel corresponding to adjacent control channel unit indexes to be mapped to an identical virtual resource block, the mapped time domain orthogonal code indexes are different or identical, but the circulating motion amount indexes are not adjacent, therefore the interference between the physical uplink response control channels corresponding to the adjacent control channel units is minimized.
Description
Technical field
The present invention relates to a kind of resource allocation methods of the communications field, particularly, relate to a kind of Physical Uplink Control Channel (Physical Uplink Control Channel that ack/nack is replied the control signaling that sends, abbreviation PUCCH) resource allocation methods and a kind of resource allocation methods of Physical Downlink Control Channel.
Background technology
In HARQ (Hybrid Automatic Repeat Request mixes automatic request retransmission) mode, the sign indicating number of making a start and sending not only can error detection, but also has certain error correcting capability.After the receiving terminal decoder is received code word, at first check error situation,, then carry out error correction automatically if in the error correcting capability of sign indicating number; If mistake is a lot, surpassed the error correcting capability of sign indicating number, come out but can detect mistake, then receiving terminal is given the decision signal of making a start by feedback channel, requires to make a start retransmission of information.At OFDM (Orthogonal Frequency Division Multiplex, OFDM) in the system, reply (Acknowledged/Non-acknowledged by ack/nack, abbreviation ACK/NACK) the control signaling represents to transmit correct/error, need to judge whether to retransmit with this.
At present, stipulate in LTE (Long Term Evolution, Long Term Evolution) system that the ACK/NACK that downlink data is relevant controls in the capable physically control channel of signaling and transmits.In frequency division duplex system, the time slot ratio of up-downgoing equates.In order to save signaling consumption, regulation is by relevant control signaling place Physical Downlink Control Channel (the Physical Downlink Control Channel of downlink data, the minimum index of control channel unit abbreviation PDCCH) (Control Channel Element is called for short CCE) implies the index of the pairing Physical Uplink Control Channel of expression ACK/NACK message.
A Physical Uplink Control Channel is expanded according to orthogonal code B time domain by the sequence A of one 12 length and is obtained, so, Physical Uplink Control Channel just with the place frequency domain position, and the cyclic shift amount of the index of orthogonal code B and sequence A is relevant, wherein, frequency domain position is a sign with the index of Resource Block.When Cyclic Prefix was the regular circulation prefix, the quantity of available orthogonal codes B was 3, and when Cyclic Prefix was extended cyclic prefix, the quantity of available orthogonal codes B was 2.
But, between the index of the control channel unit of the relevant control signaling place PDCCH of downlink data and the index that sends the Physical Uplink Control Channel that corresponding ACK/NACK controls signaling (also this control channel is called the ACK/NACK channel in the literary composition or physical uplink is replied control channel), exist a variety of mapping relations one by one.Because the possibility of exist disturbing between the portable terminal of adjacent control channel unit is bigger,, can cause larger interference if the pairing ACK/NACK interchannel in adjacent control channel unit adopts identical time domain orthogonal sign indicating number and cyclic shift amount adjacent.For this reason, be necessary to provide a kind of less mapping method of phase mutual interference that sends.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of resource allocation methods, makes the interference of the adjacent pairing ACK/NACK interchannel in control channel unit as far as possible little.
In order to address the above problem, the invention provides the resource allocation methods that a kind of physical uplink is replied control channel, described method mainly may further comprise the steps:
The control channel unit of Physical Downlink Control Channel is used in the base station, sends the relevant control signaling of downlink data to portable terminal;
After described portable terminal is received described control signaling, according to the index of described control channel unit and the mapping mode of setting, obtain up the replying in virtual resource blocks index that control channel shines upon and the virtual resource blocks of respective physical and reply the control channel index by the circulation amount of movement index of mapping and the physical uplink of time domain orthogonal sign indicating number index decision;
Described portable terminal is replied at described physical uplink and is returned ack/nack to described base station on the control channel and reply the control signaling;
Wherein, when being mapped to same virtual resource blocks, the time-division orthogonal code index that is shone upon time-division orthogonal codes different or that shone upon are identical but cyclic shift amount index is non-conterminous with the up control channel of replying of adjacent control channel unit index corresponding physical for the mapping mode of described setting.
Further, for the index i of each given described control channel unit, its corresponding physical is up replys the virtual resource blocks index k at control channel place and the physical uplink in the virtual resource blocks and replys control channel index j and be respectively:
j＝mod((i-k.N
ACK+1)×c，N
ACK+1)-1
Wherein,
Expression rounds downwards, and mod represents modulo operation, and c is and N
ACK+ 1 relatively prime arbitrary constant;
N
ACKBe illustrated in can be multiplexing in the virtual resource blocks described physical uplink reply the control channel sum.
Further,
N
ACK=36 o'clock, c=2 or c=3;
N
ACK=18 o'clock, c=2 or c=3;
N
ACK=12 o'clock, c=2 or c=3;
N
ACK=8 o'clock, c=2.
Another technical problem that the present invention will solve provides a kind of resource allocation methods of Physical Downlink Control Channel, when down control channel resources is relatively more sufficient, can guarantee that the interference of corresponding uplink ACK/NACK interchannel is as far as possible little by the resource allocation of Physical Downlink Control Channel.
For solving the problems of the technologies described above, the invention provides a kind of resource allocation methods of Physical Downlink Control Channel, described method mainly may further comprise the steps:
The base station is that portable terminal preestablishes employed physical uplink and replys control channel;
When the base station is the Physical Downlink Control Channel distribution control channel unit of described portable terminal, reply the mapping mode of the setting between control channel and the Physical Downlink Control Channel, described physical uplink according to described physical uplink and reply the index of replying control channel in virtual resource blocks index that control channel shines upon and the virtual resource blocks by the physical uplink of circulation amount of movement index and the decision of time domain orthogonal sign indicating number index, obtain the corresponding control channel unit index of described portable terminal;
The base station sends the relevant control signaling of downlink data to described portable terminal on the control channel unit that distributes;
Wherein, the mapping mode of described setting with described control channel unit maps to the mapping mode of described setting with the up control channel of replying of adjacent control channel unit index corresponding physical when being mapped to same virtual resource blocks, the time-division orthogonal code index that is shone upon time-division orthogonal codes different or that shone upon are identical but cyclic shift amount index is non-conterminous.
Further, reply the index j of control channel for each given physical uplink, the index i of the control channel unit correspondence that it is corresponding is:
i＝k.N
ACK+mod((j+1)×c′，N
ACK+1)-1；
Wherein,
Expression rounds downwards, and mod represents modulo operation, and c ' is and N
CCE+ 1 relatively prime arbitrary constant;
N
ACKBe illustrated in can be multiplexing in the virtual resource blocks described physical uplink reply the control channel sum.
Further,
N
ACK=36 o'clock, c '=19 or c '=25;
N
ACK=18 o'clock, c '=10 or c '=13;
N
ACK=12 o'clock, c '=7 or c '=9;
N
ACK=8 o'clock, c '=5.
Resource allocation methods provided by the invention, the index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data have been set up, and make the interference of the adjacent pairing ACK/NACK interchannel in control channel unit as far as possible little, and, realize simple.In addition, index the mapping of ACK/NACK channel indexes and inverse mapping, can adopt in a like fashion and carry out from the ACK/NACK channel indexes to the CCE index from CCE.
Description of drawings
Fig. 1 is a kind of corresponding relation schematic diagram of the present invention's CCE index and ACK/NACK channel indexes when using the regular circulation prefix of example;
Fig. 2 is the corresponding relation schematic diagram of the present invention's CCE index and ACK/NACK channel indexes when using the regular circulation prefix of example;
Fig. 3 is the corresponding relation schematic diagram of the present invention's CCE index and ACK/NACK channel indexes when using the regular circulation prefix of example;
Fig. 4 is the corresponding relation schematic diagram of the present invention's CCE index and ACK/NACK channel indexes when using the regular circulation prefix of example;
Fig. 5 is the corresponding relation schematic diagram of the present invention's CCE index and ACK/NACK channel indexes when using the regular circulation prefix of example;
Fig. 6 is a kind of corresponding relation schematic diagram of the present invention's CCE index and ACK/NACK channel indexes when using the extended cyclic prefix of example;
Fig. 7 is the corresponding relation schematic diagram of the present invention's CCE index and ACK/NACK channel indexes when using the extended cyclic prefix of example;
Fig. 8 is the corresponding relation schematic diagram of the present invention's CCE index and ACK/NACK channel indexes when using the extended cyclic prefix of example.
Embodiment
Main thought of the present invention is: the design principle that adopts the prime number frequency hopping, make that the interference of the adjacent pairing ACK/NACK interchannel in control channel unit can be as much as possible little, be in particular in, if the ACK/NACK channel time domain orthogonal sign indicating number of adjacent C CE correspondence is identical, their cyclic shift amount is relatively large at interval so, the orthogonality of the ACK/NACK interchannel that the cyclic shift amount is relatively large is better, thereby the phase mutual interference is also just little.
Below in conjunction with accompanying drawing embodiments of the invention are elaborated:
The resource allocation methods that the present embodiment physical uplink is replied control channel mainly may further comprise the steps:
The control channel unit of Physical Downlink Control Channel is used in the base station, sends the relevant control signaling of downlink data to corresponding portable terminal;
After portable terminal is received described control signaling, when replying control channel (being the ACK/NACK channel) Resources allocation for physical uplink, according to the mapping mode of described control channel unit index and setting, obtain up the replying in virtual resource blocks index that control channel shines upon and the virtual resource blocks of respective physical and reply the control channel index by the circulation amount of movement index of mapping and the physical uplink of time domain orthogonal sign indicating number index decision;
Portable terminal is replied on the control channel at described physical uplink and is returned ACK/NACK control signaling to the base station.
Wherein, in same virtual resource blocks the time, the time-division orthogonal code index that is shone upon time-division orthogonal codes different or that shone upon are identical but cyclic shift amount index is non-conterminous with the pairing ACK/NACK channel Mapping of adjacent control channel unit index for the mapping mode of described setting.Preferably, the mapping time-division, the orthogonal code index was adjacent the time make that also cyclic shift amount index is inequality.
Particularly, the mapping relations of the index of the index of the control channel unit at the control signaling place relevant with downlink data of the present invention and uplink ACK/NACK channel are as follows:
For the index i of the control channel unit at each given control signaling place relevant with downlink data, ACK/NACK channel indexes j is in the virtual resource blocks index k at the ACK/NACK channel place that it is corresponding and the virtual resource blocks:
j＝mod((i-k.N
ACK+1)×c，N
ACK+1)-1 (1)
Wherein,
Expression rounds downwards, and mod represents modulo operation, and c is and N
ACK+ 1 relatively prime arbitrary constant;
N
CCEThe sum of expression down control channel unit then has i ∈ { 0:N
CCE-1};
N
ACKBe illustrated in can be multiplexing in the virtual resource blocks the ACK/NACK total number of channels, j represents its index, then have j ∈ 0,1,2 ..., N
ACK-1};
The index of uplink ACK/NACK channel place virtual resource blocks
The coding rule of control channel unit index i and ACK/NACK channel indexes j is referring to relevant standard, the index of ACK/NACK channel is that elder generation's call number since a Resource Block is 0 time domain orthogonal sign indicating number in the present embodiment, by cyclic shift amount order number consecutively from small to large, and then to call number 1 time domain orthogonal sign indicating number, continue number consecutively by cyclic shift amount order from small to large, time domain orthogonal sign indicating number to the last can be with reference to Fig. 1～Fig. 8.
When the Physical Downlink Control Channel resource was relatively more sufficient, base station side can be that the down control channel of portable terminal distributes the control corresponding Channel Elements to distribute the control channel unit according to actual conditions neatly also.For this reason, the mapping mode that the present invention is based on the setting between ACK/NACK channel and the Physical Downlink Control Channel has also proposed a kind of resource allocation methods of Physical Downlink Control Channel, and concrete steps are as follows:
Base station side is given the ACK/NACK channel of the pre-set use of end side;
When the base station is the Physical Downlink Control Channel distribution control channel unit of described portable terminal, according in the mapping mode of the setting between ACK/NACK channel and the Physical Downlink Control Channel, virtual resource blocks index that the ACK/NACK channel is shone upon and the virtual resource blocks by the index of the ACK/NACK channel of circulation amount of movement index and the decision of time domain orthogonal sign indicating number index, obtain the corresponding control channel unit index of described portable terminal;
The base station sends the relevant control signaling of downlink data to described portable terminal on the control channel unit that distributes.
Particularly, for each given ACK/NACK channel indexes j, the index i of the control channel unit correspondence that it is corresponding is:
i＝k.N
ACK+mod((j+1)×c′，N
ACK+1)-1 (2)
Wherein, c ' and c and N
ACKRelation satisfy following equation:
mod(c×c′，N
ACK+1)-1＝0 (3)
Concrete, c ' and c and N
ACKValue see Table 1:
Table 1c ' and c and N
ACKList of values
| 3 | 25 | 3 | 13 | 3 | 9 | 4 | 7 |
| 4 | 28 | 4 | 5 | 4 | 10 | 8 | 8 |
| 5 | 15 | 6 | 16 | 5 | 8 | ||
| 6 | 31 | 7 | 11 | 6 | 11 | ||
| 7 | 16 | 8 | 12 | ||||
| 8 | 14 | 9 | 17 | ||||
| 9 | 33 | 14 | 15 | ||||
| 10 | 26 | ||||||
| 11 | 27 | ||||||
| 12 | 34 | ||||||
| 13 | 20 | ||||||
| 17 | 24 | ||||||
| 18 | 35 | ||||||
| 21 | 30 | ||||||
| 22 | 32 | ||||||
| 23 | 29 |
Preferably, for c ' and c and N
ACKValue, suggestion is got:
N
ACK=36 o'clock, c=2, c '=19 or c=3, c '=25;
N
ACK=18 o'clock, c=2, c '=10 or c=3, c '=13;
N
ACK=12 o'clock, c=2, c '=7 or c=3, c '=9;
N
ACK=8 o'clock, c=2, c '=5.
Below in conjunction with accompanying drawing and some application examples the present invention is described in further detail.
For the ease of understanding, we carry out earlier briefly bright to accompanying drawing.The first half is represented the corresponding relation of ACK/NACK channel and cyclic shift amount and time domain extended code in each accompanying drawing, lower part is the CCE index of the proposition according to the present invention and the mapping relations of ACK/NACK channel indexes, and actual cyclic shift amount that corresponds to of the CCE index that obtains and time domain extended code index are right.
Use example one
Suppose, under the regular circulation prefix, N
CCE=36, N
ACK=36, c=2, then, according to the given mapping relations of the present invention, set up the index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data, as shown in Figure 1:
Concrete, suppose CCE index i=0, the formula according to the present invention (1), the virtual resource blocks index that calculates corresponding with it ACK/NACK channel place is:
ACK/NACK channel code index is:
j＝mod((i+1)×c，N
ACK+1)-1
＝mod(2，37)-1
＝1
By the corresponding relation of the upper part ACK/NACK channel of Fig. 1 and cyclic shift amount and time domain extended code as can be known, call number is 1 ACK/NACK channel, the corresponding cyclic shift amount and the index of time domain extended code are to being (0,1), therefore, the index of cyclic shift amount and time domain extended code is to being corresponding CCE0 in the square of (0,1) in the lower part of Fig. 1.
Accordingly, suppose ACK/NACK channel indexes j=1, and the virtual resource blocks index k=0 at place, 1 obtain by tabling look-up, c '=19, the formula (2) according to the present invention so calculates corresponding with it CCE call number and is:
i＝k.N
ACK+mod((j+1)×c′，N
ACK+1)-1
＝mod(38，37)-1
＝0
N
ACKAnd N
CCECan not wait yet, when unequal, be distributed in the different virtual resource blocks, the different virtual Resource Block does not have specific (special) requirements to cyclic shift amount and orthogonal code strictly speaking.But also can adopt mapping in the same way.If when on the different virtual Resource Block, requiring different mappings, then can realize by selecting different c and c ' for use.
Use example two
Suppose, under the regular circulation prefix, N
CCE=18, N
ACK=18, c=2, then, according to the given mapping relations of the present invention, the minimum index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data have been set up, as shown in Figure 2.
Use example three
Suppose, under the regular circulation prefix, N
CCE=18, N
ACK=18, c=3, then, according to the given mapping relations of the present invention, the minimum index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data have been set up, as shown in Figure 3.
Use example four
Suppose, under the regular circulation prefix, N
CCE=12, N
ACK=12, c=2, then, according to the given mapping relations of the present invention, the minimum index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data have been set up, as shown in Figure 4.
Use example five
Suppose, under the regular circulation prefix, N
CCE=12, N
ACK=12, c=3, then, according to the given mapping relations of the present invention, the minimum index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data have been set up, as shown in Figure 5.
Use example six
Suppose, under extended cyclic prefix, N
CCE=12, N
ACK=12, c=2, then, according to the given mapping relations of the present invention, the minimum index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data have been set up, as shown in Figure 6.
Use example seven
Suppose, under extended cyclic prefix, N
CCE=12, N
ACK=12, c=3, then, according to the given mapping relations of the present invention, the minimum index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data have been set up, as shown in Figure 7.
Use example eight
Suppose, under extended cyclic prefix, N
CCE=8, N
ACK=8, c=2, then, according to the given mapping relations of the present invention, the minimum index and the mapping relations that send between the index of Physical Uplink Control Channel that corresponding ACK/NACK controls signaling of the control channel unit at the relevant control signaling place of downlink data have been set up, as shown in Figure 8.
In sum, the present invention has provided a kind of resource allocation methods, can be applicable to the system that all adopt the HARQ mode, make that the interference of the adjacent pairing ACK/NACK interchannel in control channel unit is as far as possible little, realize simple, and, index the mapping of ACK/NACK channel indexes and inverse mapping from CCE from the ACK/NACK channel indexes to the CCE index, can adopt in a like fashion and carry out.
The above only is an advantageous applications example of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1, a kind of physical uplink is replied the resource allocation methods of control channel, it is characterized in that, described method mainly may further comprise the steps:
The control channel unit of Physical Downlink Control Channel is used in the base station, sends the relevant control signaling of downlink data to portable terminal;
After described portable terminal is received described control signaling, according to the index of described control channel unit and the mapping mode of setting, obtain up the replying in virtual resource blocks index that control channel shines upon and the virtual resource blocks of respective physical and reply the control channel index by the circulation amount of movement index of mapping and the physical uplink of time domain orthogonal sign indicating number index decision;
Described portable terminal is replied at described physical uplink and is returned ack/nack to described base station on the control channel and reply the control signaling;
Wherein, when being mapped to same virtual resource blocks, the time-division orthogonal code index that is shone upon time-division orthogonal codes different or that shone upon are identical but cyclic shift amount index is non-conterminous with the up control channel of replying of adjacent control channel unit index corresponding physical for the mapping mode of described setting.
2, the method for claim 1 is characterized in that,
For the index i of each given described control channel unit, its corresponding physical is up replys the virtual resource blocks index k at control channel place and the physical uplink in the virtual resource blocks and replys control channel index j and be respectively:
j＝mod((i-k.N
ACK+1)×c，N
ACK+1)-1
Wherein,
Expression rounds downwards, and mod represents modulo operation, and c is and N
ACK+ 1 relatively prime arbitrary constant;
N
ACKBe illustrated in can be multiplexing in the virtual resource blocks described physical uplink reply the control channel sum.
3, method as claimed in claim 2 is characterized in that,
N
ACK=36 o'clock, c=2 or c=3;
N
ACK=18 o'clock, c=2 or c=3;
N
ACK=12 o'clock, c=2 or c=3;
N
ACK=8 o'clock, c=2.
4, a kind of resource allocation methods of Physical Downlink Control Channel is characterized in that, described method mainly may further comprise the steps:
The base station is that portable terminal preestablishes employed physical uplink and replys control channel;
When the base station is the Physical Downlink Control Channel distribution control channel unit of described portable terminal, reply the mapping mode of the setting between control channel and the Physical Downlink Control Channel, described physical uplink according to described physical uplink and reply the index of replying control channel in virtual resource blocks index that control channel shines upon and the virtual resource blocks by the physical uplink of circulation amount of movement index and the decision of time domain orthogonal sign indicating number index, obtain the corresponding control channel unit index of described portable terminal;
The base station sends the relevant control signaling of downlink data to described portable terminal on the control channel unit that distributes;
Wherein, the mapping mode of described setting with described control channel unit maps to the mapping mode of described setting with the up control channel of replying of adjacent control channel unit index corresponding physical when being mapped to same virtual resource blocks, the time-division orthogonal code index that is shone upon time-division orthogonal codes different or that shone upon are identical but cyclic shift amount index is non-conterminous.
5, method as claimed in claim 4 is characterized in that,
Reply the index j of control channel for each given physical uplink, the index i of the control channel unit correspondence that it is corresponding is:
i＝k.N
ACK+mod((j+1)×c′，N
ACK+1)-1；
Wherein,
Expression rounds downwards, and mod represents modulo operation, and c ' is and N
CCE+ 1 relatively prime arbitrary constant;
N
ACKBe illustrated in can be multiplexing in the virtual resource blocks described physical uplink reply the control channel sum.
6, method as claimed in claim 5 is characterized in that,
N
ACK=36 o'clock, c '=19 or c '=25;
N
ACK=18 o'clock, c '=10 or c '=13;
N
ACK=12 o'clock, c '=7 or c '=9;
N
ACK=8 o'clock, c '=5.
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