CN101309134A - Notifying method of downlink data receiving status - Google Patents
Notifying method of downlink data receiving status Download PDFInfo
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- CN101309134A CN101309134A CNA2008101318514A CN200810131851A CN101309134A CN 101309134 A CN101309134 A CN 101309134A CN A2008101318514 A CNA2008101318514 A CN A2008101318514A CN 200810131851 A CN200810131851 A CN 200810131851A CN 101309134 A CN101309134 A CN 101309134A
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Abstract
The invention discloses a down-link data receiving status notification method which relates to mobile communication field. The method of the invention is that: divide the circulatory shift value of each up-link data demodulation pilot frequency on the base station and terminal into the circulatory shift value which respectively corresponds to the circulatory shift value when the terminal has down-link data acknowledgement message to transmit and to the circulatory shift value when the terminal has no down-link data acknowledgement message to transmit; and each circulatory shift value only corresponds one of the situations. When the terminal transmits the up-link data through a physical up-link sharing channel, the terminal select a circulatory shift value corresponding to the situation to calculate and generate a circulatory shift value used by the up-link data demodulation pilot frequency according to the status whether the subframe where the physical up-link sharing channel exists has the down-link data acknowledgement message to transmit, and then generate corresponding up-link data demodulation pilot frequency which is transmitted together with the physical up-link sharing channel. The technique proposal ensures the base station to accurately obtain the status that the terminal receives down-link data, and increases the using ratio of the up-link data demodulation pilot frequency at the same time.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to a kind of Notification Method of downlink data receiving state.
Background technology
The develop rapidly of digital communication system is had higher requirement to reliability of data communication, yet, under abominable channel, especially in high data rate or the high-speed mobile environment, multipath interference and Doppler frequency shift etc. seriously affect systematic function, effective error-control technique, (Hybrid Automatic Repeat Request, HARQ) technology just becomes the focus that the communications field endeavours to study especially to mix automatic request retransmission.
In the HARQ mode, the sign indicating number that transmitting terminal sends not only can error detection, but also has certain error correcting capability.After the terminal decoder is received code word, at first check error situation, if in the error correcting capability of sign indicating number, then carry out error correction automatically, if mistake is a lot, surpassed the error correcting capability of sign indicating number, come out but can detect mistake, then terminal is sent out a decision signal by feedback channel to transmitting terminal, requires the transmitting terminal retransmission of information.
At OFDM (Orthogonal Frequency Division Multiplexing, OFDM) in the system, represent the correct or mistake of transmission by ACK or NACK (Acknowledged or Non-acknowledged) control signaling, need to judge whether to retransmit with this.
At present, at LTE (Long Term Evolution, the 3GPP Long Term Evolution) stipulates in the system, when terminal is received uplink authorization signaling, the affirmation message of transmitting downlink data in the capable physically shared channel, when terminal is not received uplink authorization signaling, the affirmation message of transmitting downlink data in the capable physically control channel.
Downlink data distributes the control signaling to indicate its position on physical carrier by downlink resource, and downlink resource distributes the control signaling bear on Physical Downlink Control Channel, and terminal is sought the Physical Downlink Control Channel that sends to oneself by the mode of blind Detecting.Because space channel environment more complicated, under the scene of some bad channels, terminal detects probably less than the Physical Downlink Control Channel of issuing oneself, terminal just can not separated the downlink data of issuing oneself like this, also can not feed back the affirmation message of corresponding downstream data, therefore, need establishment of a mechanism, can know to guarantee the base station whether terminal detects the Physical Downlink Control Channel of issuing oneself.
Generally, when transmitting in the capable physically control channel of the affirmation message of downlink data, the base station can judge whether the user has sent the affirmation message of downlink data by the method for blind Detecting Physical Uplink Control Channel, thereby, can know whether terminal detects the Physical Downlink Control Channel of issuing oneself; When transmitting in the capable physically shared channel of the affirmation message of downlink data, whether present solution is to represent to have downlink data to send by increase by 1 bit in uplink authorization signaling, when terminal detects uplink authorization signaling, terminal just can know whether downlink data transmission is arranged by receiving 1 bit indication signaling, like this, when terminal does not detect the Physical Downlink Control Channel of issuing oneself, terminal will be gone physically and be reported this state in the shared channel, and the base station just can know whether terminal detects the Physical Downlink Control Channel of issuing oneself; But, because in the LTE system, when sending semi-continuous scheduling data and data retransmission, there is not uplink authorization signaling to send, under this scene, terminal just can not correctly report the state of own downlink data receiving, and the base station just can not know also whether terminal detects the Physical Downlink Control Channel of issuing oneself.
Summary of the invention
Technical problem to be solved by this invention is, a kind of Notification Method of downlink data receiving state is provided, and makes the base station can know correctly whether terminal detects the Physical Downlink Control Channel of issuing oneself.
In order to address the above problem, the invention discloses a kind of Notification Method of downlink data receiving state, the cyclic shift amount of correspondence when the affirmation message that the cyclic shift amount of each upstream data demodulation pilot frequency is divided into terminal and has downlink data in base station and terminal sends and when not having the affirmation message of downlink data to send, and arbitrary cyclic shift amount is only corresponding to wherein a kind of situation;
When described terminal sends upstream data by Physical Uplink Shared Channel, send according to the affirmation message whether downlink data is arranged on the subframe at described Physical Uplink Shared Channel place, select a cyclic shift amount computing of this situation correspondence to produce the cyclic shift amount that the upstream data demodulation pilot frequency uses, generate corresponding upstream data demodulation pilot frequency and send with described Physical Uplink Shared Channel.
Further, in the said method, described upstream data demodulation pilot frequency sequence comprises root sequence and cyclic shift amount, each root sequence comprises 2n cyclic shift amount at least, this 2n cyclic shift amount is divided into the n group, two different cyclic shift amounts correspond respectively to described terminal and have the situation that the situation that the affirmation message of downlink data sends and the affirmation message that does not have downlink data send in every group, and n is a natural number.
Further, the root sequence of each upstream data demodulation pilot frequency comprises 12 cyclic shift amounts; In the base station with terminal is divided into groups these cyclic shift amounts and for group number of every set of dispense, per two cyclic shift amounts are one group, the cyclic shift amount that each group comprises is different.
Further, the root sequence of each upstream data demodulation pilot frequency comprises 12 cyclic shift amounts, is divided into 6 groups;
Described base station is a cyclic shift amount group number of notifying terminal upstream data demodulation pilot frequency sequence to use by 3 bit indication signalings in the uplink authorization signaling.
Further, produce the cyclic shift amount n of upstream data demodulation pilot frequency according to following formula
Cs:
Wherein, n
DMRS (1)Be broadcasted values, n
DMRS (2)Whether definite, n if having the affirmation message of downlink data to send on the subframe by the cyclic shift amount group number of 3 bit indication signalings notice in the described uplink authorization signaling and described Physical Uplink Shared Channel place
PRSBe to produce by the proprietary scrambler in sub-district.
Further, described 12 cyclic shift amounts are: 0,1,2,3,4,5,6,7,8,9,10,11; The mode of described grouping is: and 0,1}, 2,3}, and 4,5}, 6,7}, and 8,9}, 10,11}.
Further, described base station notifies described terminal to send the cyclic shift amount group number that the upstream data demodulation pilot frequency sequence uses by uplink authorization signaling when sending downlink data;
Whether described terminal is according to having the affirmation message of described downlink data to send, from two cyclic shift amounts of described group number, select a cyclic shift amount corresponding under this situation, and produce the cyclic shift amount of upstream data demodulation pilot frequency in conjunction with the proprietary scrambler computing in broadcasted values and sub-district, on the sub-frame of uplink of the affirmation message that should send described downlink data, send the upstream data demodulation pilot frequency sequence that uses this cyclic shift amount that generates.
Further, when described terminal is retransmitted upstream data or new up semi-continuous scheduling data to described base station, cyclic shift amount group number that the upstream data demodulation pilot frequency sequence of described base station notice uses during according to first transmission and the affirmation message whether described downlink data is arranged send, from corresponding cyclic shift amount group, select a cyclic shift amount corresponding under this situation, produce the cyclic shift amount of upstream data demodulation pilot frequency in conjunction with the proprietary scrambler computing in broadcasted values and sub-district, send the upstream data demodulation pilot frequency sequence of the cyclic shift amount of using this generation.
Further, after described upstream data demodulation pilot frequency is received in described base station, the cyclic shift amount of using according to described upstream data demodulation pilot frequency is carried out inverse operation earlier, obtain whether having the affirmation message of downlink data to send corresponding described cyclic shift amount, judge according to the value of this cyclic shift amount whether described terminal is current has the affirmation message of downlink data to send with terminal.
Further, the situation that second cyclic shift amount in the situation that first cyclic shift amount in described every group of cyclic shift amount does not have the affirmation message of downlink data to send corresponding to terminal, every group of cyclic shift amount has the affirmation message of downlink data to send corresponding to terminal.
The technical program guarantees that the base station can accurately obtain the state of terminal downlink data receiving, promptly the base station can know whether terminal detects the base station and issue the Physical Downlink Control Channel of himself under any scene, in addition, the technical program has also improved the utilization rate of upstream data demodulation pilot frequency sequence.
Embodiment
Main design of the present invention is, because at present in the LTE system, upstream data demodulation pilot frequency (being also referred to as the upstream data demodulation pilot frequency sequence) and Physical Uplink Shared Channel send together, therefore, whether the different cyclic shift amounts that can select upstream data demodulation pilot frequency counterpart terminal respectively send the situation of the affirmation message of downlink data, generate the cyclic shift amount of the upstream data demodulation pilot frequency that terminal will send then according to selected cyclic shift amount, thereby the assurance base station can know accurately whether terminal detects the Physical Downlink Control Channel of issuing oneself.Wherein, the upstream data demodulation pilot frequency sequence is generated by a certain cyclic shift amount displacement back by the root sequence, the root sequence is notified to terminal by high-level signaling, and cyclic shift amount group number is notified to terminal by 3 bit indication signalings in the uplink authorization signaling, and each root sequence can have 12 cyclic shift amounts.The LTE system has only used 8 cyclic shift amounts at present.
It is as follows that the cyclic shift volume production of the upstream data demodulation pilot frequency that terminal will send is given birth to formula:
Wherein, n
DMRS (1)Be broadcasted values, n
DMRS (2)Whether definite, n if having the affirmation message of downlink data to send on the subframe by the cyclic shift amount group number of 3 bit indication signalings notice in the described uplink authorization signaling and described Physical Uplink Shared Channel place
PRSBe to produce by the proprietary scrambler in sub-district.
Below in conjunction with embodiment technical solution of the present invention is described in further detail.
Embodiment 1
In the present embodiment, 12 cyclic shift amounts of each upstream data demodulation pilot frequency root sequence are divided into 6 groups, every group comprises two cyclic shift amounts, the affirmation message that downlink data should be arranged is sent and is not had the affirmation message transmission both of these case of downlink data respectively, concrete corresponding relation is arranged in advance by base station and terminal, further, can 12 cyclic shift amounts of each upstream data demodulation pilot frequency root sequence are as follows according to the size numbering of cyclic shift amount:
0，1，2，3，4，5，6，7，8，9，10，11
Then, divide into groups successively according to above-mentioned numbering, per two cyclic shift amounts are one group, and the cyclic shift amount that each group comprises is different, as dividing into groups in the following manner:
{0，1}，{2，3}，{4，5}，{6，7}，{8，9}，{10，11}
Suppose that base station and terminal arrange in advance, first cyclic shift amount counterpart terminal has the situation that the affirmation message of downlink data sends in each cyclic shift amount group, second situation that cyclic shift amount counterpart terminal does not have the affirmation message of downlink data to send.For example base station notice terminal cyclic shift amount group number is 2 o'clock, promptly cyclic shift amount group 2,3}, wherein 2 expression terminals have the affirmation message of downlink data to send, 3 expression terminals do not have the affirmation message of downlink data to send.
The flow process of present embodiment method is as follows:
Step 101: the base station sends data to terminal on descending sub frame k;
Step 102: terminal does not detect at descending sub frame k and sends to the Physical Downlink Control Channel that oneself carries the downlink data resource allocation signal, but it receives the base station when sending to the uplink authorization signaling of oneself, from described uplink authorization signaling, obtain the cyclic shift amount group number of current upstream data demodulation pilot frequency sequence correspondence, wherein, cyclic shift amount group number is represented by 3 bit indication signalings in the uplink authorization signaling, in the present embodiment, this cyclic shift amount group be second group 2,3};
Suppose n
DMRS (1)Be 8, n
DMRS (2)Be 4, then,
According to
When the affirmation message transmission of downlink data was arranged, the cyclic shift amount of upstream data demodulation pilot frequency was
When not having the affirmation message transmission of downlink data, the cyclic shift amount of upstream data demodulation pilot frequency is
Step 103: at last terminal transmission Physical Uplink Shared Channel of sub-frame of uplink k+4 (number of sub frames of time-delay also can be worth for other) and cyclic shift amount is the target upstream data demodulation pilot frequency sequence of " 3 ";
Step 104: the upstream data demodulation pilot frequency sequence is detected in the base station on sub-frame of uplink k+4, obtain the cyclic shift amount for behind the upstream data demodulation pilot frequency sequence of " 3 ", according to formula (1) cyclic shift amount " 3 " is carried out inverse operation, learn that terminal do not have the affirmation message of downlink data and send, can determine that then terminal does not detect the Physical Downlink Control Channel of bearing downlink data resource assignment signalling, the base station resends initial data.
Embodiment 2
Present embodiment is substantially the same manner as Example 1, and difference is, present embodiment is applied to terminal applies in retransmitting upstream data or sending the scene of new up semi-continuous scheduling data, and its flow process may further comprise the steps:
Step 201: the base station sends data to terminal on descending sub frame k;
Step 202: terminal does not detect when sending to the Physical Downlink Control Channel that oneself carries the downlink data resource allocation signal on descending sub frame k, on the respective physical position of sub-frame of uplink k+4, retransmit corresponding upstream data or send new up semi-continuous scheduling data, wherein, second cyclic shift amount when terminal will be transmitted for the first time in the cyclic shift amount group of configuration, produce the cyclic shift amount of upstream data demodulation pilot frequency according to formula (1) computing in conjunction with the proprietary scrambler of broadcasted values and sub-district, terminal is used cyclic shift amount that is produced and the target root sequence transmission upstream data demodulation pilot frequency sequence that is disposed by high-level signaling, in this enforcement, the cyclic shift amount of the upstream data demodulation pilot frequency of generation is " 3 ";
Step 203: the base station detects the upstream data demodulation pilot frequency sequence on sub-frame of uplink k+4, obtain the cyclic shift amount for behind the upstream data demodulation pilot frequency sequence of " 3 ", according to formula (1) cyclic shift amount " 3 " is carried out inverse operation, learn that terminal do not have the affirmation message of downlink data and send, can determine that then terminal does not detect the Physical Downlink Control Channel of bearing downlink data resource assignment signalling, the base station resends initial data.
Embodiment 3
Present embodiment is substantially the same manner as Example 1, and difference is that present embodiment is applied to terminal and detects the scene that sends to the Physical Downlink Control Channel that oneself carries the downlink data resource allocation signal, and its detailed process is as follows:
Step 301: the base station sends data to terminal on descending sub frame k;
Step 302: terminal detects when sending to the Physical Downlink Control Channel that oneself carries the downlink data resource allocation signal on descending sub frame k, on the respective physical position, correctly solve the base station and send to the data of oneself, then, terminal is retransmitted corresponding upstream data or is sent new up continuous dispatching data on the respective physical resource of sub-frame of uplink k+4, first cyclic shift amount when terminal will be transmitted for the first time in the cyclic shift amount group of configuration, produce the cyclic shift amount of upstream data demodulation pilot frequency according to formula (1) computing in conjunction with the proprietary scrambler of broadcasted values and sub-district, terminal uses the cyclic shift amount that is produced (in the present embodiment, the cyclic shift amount is " 2 ") and send the upstream data demodulation pilot frequency sequence by the target root sequence of high-level signaling configuration, promptly terminal sends the affirmation message (ACK) of downlink data on sub-frame of uplink k+4;
Step 303: the upstream data demodulation pilot frequency sequence is detected in the base station on sub-frame of uplink k+4, obtain the cyclic shift amount for behind the upstream data demodulation pilot frequency sequence of " 2 ", according to formula (1) cyclic shift amount " 2 " is carried out inverse operation, learn that terminal has the affirmation message of downlink data to send, can determine that then terminal detects the Physical Downlink Control Channel of bearing downlink data resource assignment signalling, and, there is the affirmation message of this downlink data to send on the capable physically shared channel, solve the affirmation message of this downlink data from Physical Uplink Shared Channel, be known as ACK, the correct reception.
From the foregoing description as can be seen, the technical program guarantees that the base station can accurately obtain the state of terminal downlink data receiving, promptly the base station can know whether terminal detects the base station and issue the Physical Downlink Control Channel of himself under any scene, in addition, the technical program has also improved the utilization rate of upstream data demodulation pilot frequency sequence.
The above is embodiments of the invention only, 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 the claim scope of the present invention.
Claims (10)
1, a kind of Notification Method of downlink data receiving state is characterized in that,
The cyclic shift amount of correspondence when the affirmation message that the cyclic shift amount of each upstream data demodulation pilot frequency is divided into terminal and has downlink data in base station and terminal sends and when not having the affirmation message of downlink data to send, and arbitrary cyclic shift amount is only corresponding to wherein a kind of situation;
When described terminal sends upstream data by Physical Uplink Shared Channel, send according to the affirmation message whether downlink data is arranged on the subframe at described Physical Uplink Shared Channel place, select a cyclic shift amount computing of this situation correspondence to produce the cyclic shift amount that the upstream data demodulation pilot frequency uses, generate corresponding upstream data demodulation pilot frequency and send with described Physical Uplink Shared Channel.
2, the method for claim 1 is characterized in that,
Described upstream data demodulation pilot frequency sequence comprises root sequence and cyclic shift amount, each root sequence comprises 2n cyclic shift amount at least, this 2n cyclic shift amount is divided into the n group, two different cyclic shift amounts correspond respectively to described terminal and have the situation that the situation that the affirmation message of downlink data sends and the affirmation message that does not have downlink data send in every group, and n is a natural number.
3, method as claimed in claim 2 is characterized in that:
The root sequence of each upstream data demodulation pilot frequency comprises 12 cyclic shift amounts; In the base station with terminal is divided into groups these cyclic shift amounts and for group number of every set of dispense, per two cyclic shift amounts are one group, the cyclic shift amount that each group comprises is different.
4, method as claimed in claim 3 is characterized in that,
The root sequence of each upstream data demodulation pilot frequency comprises 12 cyclic shift amounts, is divided into 6 groups;
Described base station is a cyclic shift amount group number of notifying terminal upstream data demodulation pilot frequency sequence to use by 3 bit indication signalings in the uplink authorization signaling.
5, method as claimed in claim 4 is characterized in that:
Produce the cyclic shift amount n of upstream data demodulation pilot frequency according to following formula
Cs:
Wherein, n
DMRS (1)Be broadcasted values, n
DMRS (2)Whether definite, n if having the affirmation message of downlink data to send on the subframe by the cyclic shift amount group number of 3 bit indication signalings notice in the described uplink authorization signaling and described Physical Uplink Shared Channel place
PRSBe to produce by the proprietary scrambler in sub-district.
6, method as claimed in claim 5 is characterized in that:
Described 12 cyclic shift amounts are: 0,1,2,3,4,5,6,7,8,9,10,11; The mode of described grouping is: and 0,1}, 2,3}, and 4,5}, 6,7}, and 8,9}, 10,11}.
7, as claim 2,3 or 4 described methods, it is characterized in that,
Described base station notifies described terminal to send the cyclic shift amount group number that the upstream data demodulation pilot frequency sequence uses by uplink authorization signaling when sending downlink data;
Whether described terminal is according to having the affirmation message of described downlink data to send, from two cyclic shift amounts of described group number, select a cyclic shift amount corresponding under this situation, and produce the cyclic shift amount of upstream data demodulation pilot frequency in conjunction with the proprietary scrambler computing in broadcasted values and sub-district, on the sub-frame of uplink of the affirmation message that should send described downlink data, send the upstream data demodulation pilot frequency sequence that uses this cyclic shift amount that generates.
8, method as claimed in claim 2 is characterized in that,
When described terminal is retransmitted upstream data or new up semi-continuous scheduling data to described base station, cyclic shift amount group number that the upstream data demodulation pilot frequency sequence of described base station notice uses during according to first transmission and the affirmation message whether described downlink data is arranged send, from corresponding cyclic shift amount group, select a cyclic shift amount corresponding under this situation, produce the cyclic shift amount of upstream data demodulation pilot frequency in conjunction with the proprietary scrambler computing in broadcasted values and sub-district, send the upstream data demodulation pilot frequency sequence of the cyclic shift amount of using this generation.
9, as the described method of arbitrary claim in the claim 2,3,4,5,6 or 8, it is characterized in that:
After described upstream data demodulation pilot frequency is received in described base station, the cyclic shift amount of using according to described upstream data demodulation pilot frequency is carried out inverse operation earlier, obtain whether having the affirmation message of downlink data to send corresponding described cyclic shift amount, judge according to the value of this cyclic shift amount whether described terminal is current has the affirmation message of downlink data to send with terminal.
10, as the described method of arbitrary claim in the claim 2,3,4,5,6 or 8, it is characterized in that:
The situation that second cyclic shift amount in the situation that first cyclic shift amount in described every group of cyclic shift amount does not have the affirmation message of downlink data to send corresponding to terminal, every group of cyclic shift amount has the affirmation message of downlink data to send corresponding to terminal.
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| WO2011137620A1 (en) * | 2010-05-06 | 2011-11-10 | 中兴通讯股份有限公司 | Indication method and system for uplink demodulation reference signals |
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