CN101132204A - Transmission method and equipment for uplink scheduling assignment - Google Patents
Transmission method and equipment for uplink scheduling assignment Download PDFInfo
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- CN101132204A CN101132204A CNA2006101151019A CN200610115101A CN101132204A CN 101132204 A CN101132204 A CN 101132204A CN A2006101151019 A CNA2006101151019 A CN A2006101151019A CN 200610115101 A CN200610115101 A CN 200610115101A CN 101132204 A CN101132204 A CN 101132204A
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Abstract
一种基站的上行调度指配控制信令的传输方法，包括步骤：基站配置共享的上行调度指配控制信道；基站通知用户设备所配置的共享的上行调度指配控制信道；基站判断当前的下行数据传输状态是否满足在传输数据的时频资源上传输上行调度指配控制信令的条件；在传输下行数据的时频资源中的某些特定的子载波上传输下行调度指配控制信令；在所调度的上行资源上接收用户发送的上行数据。本发明相对其他的上行调度指配控制信令传输方法，在用户传输下行数据的时频资源上传输该用户上行调度指配控制信令，这使得上行调度指配控制信令可以在信道质量较好的频段传输，从而利用了用户间的频率选择增益，提高了上行调度控制信令的传输增益。
A method for transmitting uplink scheduling assignment control signaling of a base station, comprising steps: the base station configures a shared uplink scheduling assignment control channel; the base station notifies user equipment of the configured shared uplink scheduling assignment control channel; the base station judges the current downlink Whether the data transmission status satisfies the condition of transmitting uplink scheduling assignment control signaling on the time-frequency resources for transmitting data; transmitting downlink scheduling assignment control signaling on some specific subcarriers in the time-frequency resources for transmitting downlink data; Receive uplink data sent by the user on the scheduled uplink resource. Compared with other uplink scheduling assignment control signaling transmission methods, the present invention transmits the user uplink scheduling assignment control signaling on the time-frequency resource where the user transmits downlink data, which enables the uplink scheduling assignment control signaling to be transmitted when the channel quality is relatively low. Good frequency band transmission, so that the frequency selection gain among users is utilized, and the transmission gain of the uplink scheduling control signaling is improved.
Description
Technical field
The present invention relates to mobile radio communications system, particularly relate to the transmission method of a kind of ascending scheduling assignment in the wireless system.
Background technology
Now, third generation partner plan (being called for short 3GPP) standardization body has set about beginning its existing system standard is carried out long-term evolution (LTE).About the discussion of LTE, OFDM (OFDM) technology will be as the down physical layer transmission technology among the LTE according at present, and single-carrier frequency division multiple access insert (being called for short SC-FDMA) will be as the upstream physical layer transmission technology among the LTE.
Be a kind of multi-carrier modulation communication technology on the OFDM technological essence, its basic principle is the data flow of a two-forty to be decomposed into several rate data streams transmit simultaneously on one group of mutually orthogonal subcarrier.The OFDM technology is because its multicarrier character has performance advantage aspect a lot.(1) significant advantage of OFDM technology is because data parallel transmission on a plurality of subcarriers respectively, and the length of the symbol on each subcarrier increases accordingly, has alleviated because channel delay brings the influence of intersymbol interference; Add protection on each symbol at interval by further giving, promptly introduce Cyclic Prefix (CP), under the situation of channel delay, can eliminate intersymbol interference (ISI) fully less than circulating prefix-length.Like this, each subcarrier has all experienced flat fading channel.(2) availability of frequency spectrum height of OFDM technology, ofdm signal are actual on frequency domain an overlapping, and this overlapping on improved the availability of frequency spectrum to a great extent.(3) ability of the anti-narrow band interference of OFDM technology and frequency selective fading is stronger.By with chnnel coding and being used in combination of interweaving, can strengthen the frequency diversity and the time diversity effect of ofdm system, thereby resist narrow band interference and frequency selective fading effectively.(4) OFDM technology modulation and demodulation can be realized by baseband I FFT/FTT conversion, and IFFT/FFT has ripe quick calculation method, can realize in dsp chip and hardware configuration easily.
Be different from WCDMA system uplink power limited, still ascending power is not limited in up Single Carrier Frequency Division Multiple Access system in the LTE system, its channel resource also is limited, therefore in order to improve uplink efficient, the base station need be dispatched the running time-frequency resource of each user uplink transmission according to each user's up channel condition.This just need the base station in down channel except send the relevant automatic repeat requests of mixing (HARQ) signaling of uplink to subscriber equipment, also to send the resource assignation control signaling of uplink scheduling.
The control signaling of uplink scheduling resource assignation comprise in have:
● subscriber equipment identifier (UE ID): be used to indicate the subscriber equipment that is scheduled;
● institute's scheduled resources assignment: be used to indicate the frequency resource of distributing to the scheduled user;
● transmitting uplink data form indication information: the restriction that is used to indicate transmitting uplink data form or transformat.
● the duration (Duration): be used to indicate the duration of institute's Resources allocation, this content is optional.
For the transmission of uplink scheduling resource assignation, having company to propose at present will be in subscriber equipment minimum ability (Capability) bandwidth (for example: 10MHz) punching transmission ascending scheduling assignment control signaling on subcarrier (Sub-carrier) position known in advance of subscriber equipment.Like this, each terminal just can receive uplink scheduling information.For the system of 20MHz, the base station can be selectively the control signaling of transmission uplink scheduling in the above or in the following 10MHz frequency sub-band, its transmission means is as shown in Figure 1.。
The control of the transmission that they proposed can signaling can have following variable content:
A) HARQ bit+CRC (cyclic redundancy check (CRC));
B) UE ID1+ resource allocation 1+HARQ bit+CRC;
C) UE ID1+ resource allocation 1+UE ID2+ resource allocation 2+HARQ bit+CRC;
D) UE ID1+ resource allocation 1+UE ID2+ resource allocation 2+UE ID3+ resource allocation 3+HARQ bit+CRC;
Or the like ...
Utilize aforesaid way, the base station sends scheduling control signaling and HARQ control signaling that ascending resource distributes can for neatly a plurality of users, but owing to utilize said method is the ascending scheduling control signaling of the one or more users of punching transmission on the subcarrier that subscriber equipment is known in advance in certain frequency range, does not utilize the frequency selective scheduling gain between subscriber equipment.And subscriber equipment can have dual mode when transmitting downlink data usually, and a kind of is distributed (Distributed) transfer of data, and a kind of is local formula (Localized) transfer of data.Under distributed transmission, the base station is at discrete subcarrier transmitting data.Distributed transmission can be transmitted on the discrete subcarrier in bigger frequency range, can obtain bigger frequency diversity gain.Under local formula transmission, the continuous sub-carriers transmitting data of base station on the certain frequency Resource Block.Local formula transmission can utilize subscriber equipment at the channel quality report of each frequency resource block the employed frequency resource block of subscriber equipment to be dispatched, to obtain the frequency selective scheduling gain between subscriber equipment.
Because the transmitting uplink data scheduling control signaling also in downlink transfer, if also can utilize the frequency selective scheduling gain between subscriber equipment to transmit, just can improve the transmission performance of ascending scheduling control signaling like that effectively.Therefore be necessary to design a kind of control signal transmission method of new transmission ascending scheduling assignment,, improve control signaling transmission performances to utilize the frequency selective scheduling gain between subscriber equipment.
Summary of the invention
At the problems referred to above, the present invention seeks to propose a kind of ascending scheduling assignment control method for transmitting signaling, make ascending scheduling assignment control signaling on the channel quality good channel, to transmit, thereby reduce transmission ascending scheduling assignment control signaling resource needed, improve the transmission gain of ascending scheduling assignment control signaling.Another object of the present invention is to provide a kind of ascending scheduling assignment control signaling transmission means, to reduce the signaling burden of ascending scheduling assignment control signaling.
According to an aspect of of the present present invention, a kind of ascending scheduling assignment of base station control method for transmitting signaling comprises step:
A) the shared ascending scheduling assignment control channel of base station configuration;
B) the ascending scheduling assignment control channel of sharing that disposed of base station notifying user equipment;
C) base station judges whether current downlink data transmission state satisfies the condition of transmission ascending scheduling assignment control signaling on the running time-frequency resource of transmission data;
D) transmission descending scheduling assignment control signaling on some the specific subcarrier in the running time-frequency resource of transmitting downlink data;
E) on the ascending resource of being dispatched, receive the upstream data that the user sends.
According to a further aspect in the invention, the method for reseptance of a kind of ascending scheduling assignment of subscriber equipment control signaling comprises step:
A) subscriber equipment is known the channel Mapping information of the ascending scheduling assignment control channel of sharing that the base station disposes;
B) subscriber equipment receives the descending control signaling that the base station sent;
C) subscriber equipment judges whether to satisfy the condition that receives ascending scheduling assignment control signaling on the downlink data transmission resource;
D) subscriber equipment detects ascending scheduling assignment control signaling when receiving downlink transmission data in the running time-frequency resource of transmitting downlink data;
E) subscriber equipment detects and whether has received the ascending scheduling assignment control signaling of it being carried out ascending scheduling assignment;
F) subscriber equipment transmit ascending data on the ascending resource that is distributed.
According to another aspect of the invention, a kind of base station equipment that is used to realize ascending scheduling assignment control method for transmitting signaling comprises transmitting antenna, radio frequency sending set, and D/A switch adds Cyclic Prefix, and the OFDM modulation module also comprises:
A) scheduler is used for producing descending control signaling, ascending scheduling assignment signaling, and the transmission means of control ascending scheduling assignment signaling;
B) share ascending scheduling assignment control channel dispensing device, when not having the downlink data transmission resource, be used for transmitting ascending scheduling assignment control signaling;
C) dispensing device of data channel is used for transmission ascending scheduling assignment control signaling when the downlink data transmission resource is arranged.
The present invention is other ascending scheduling assignment control signal transmission method relatively, this user uplink scheduling assignment control signaling of transmission on the running time-frequency resource of user's transmitting downlink data, this makes that ascending scheduling assignment control signaling can be in channel quality band transmissions preferably, thereby utilized the frequency between the user to select gain, improved the transmission gain of ascending scheduling control signaling.In addition, transmission ascending scheduling assignment control signaling has been avoided the transmission of subscriber equipment identifier on the running time-frequency resource of transmitting downlink data, can reduce the signaling burden of ascending scheduling assignment control signaling effectively.
Description of drawings
Fig. 1 is existing ascending scheduling assignment signaling transmission schematic diagram;
Fig. 2 is the operating procedure that ascending scheduling assignment proposed by the invention is controlled base station in the method for transmitting signaling 1;
Fig. 3 is the operating procedure that ascending scheduling assignment proposed by the invention is controlled subscriber equipment in the method for transmitting signaling 1;
Fig. 4 is the operating procedure that ascending scheduling assignment proposed by the invention is controlled base station in the method for transmitting signaling 2;
Fig. 5 is the operating procedure that ascending scheduling assignment proposed by the invention is controlled subscriber equipment in the method for transmitting signaling 2;
Fig. 6 is that the hardware of the ascending scheduling assignment transmission method base station that proposed is realized block diagram;
Fig. 7 is that the hardware of the ascending scheduling assignment transmission method subscriber equipment that proposed is realized block diagram;
Fig. 8 is an embodiment of the invention sub-carriers sortord schematic diagram;
Fig. 9 is the embodiment of base station in three kinds of modes of downlink data transmission transmitted over resources ascending scheduling assignment control signaling;
Figure 10 is that the base station sends uplink scheduling scheduling control signaling hardware realization block diagram among the embodiment;
Figure 11 is that subscriber equipment receives uplink scheduling scheduling control signaling hardware realization block diagram among the embodiment.
Embodiment
The present invention proposes a kind of ascending scheduling assignment control method for transmitting signaling, and has provided step and the equipment of realizing this ascending scheduling assignment control method for transmitting signaling.
If can the control signaling that uplink scheduling is relevant on the running time-frequency resource of transmitting downlink data, transmit, in ascending scheduling control signaling, just need not so to have indicated the identifier of subscriber equipment, can reduce the signaling burden of ascending scheduling assignment control signaling like this.In addition, if downlink data, can also utilize the frequency selective scheduling gain between subscriber equipment in local formula transmitted over resources, improve the transmission performance of ascending scheduling control signaling.Based on this, the inventive method has provided transmission ascending scheduling assignment control method for transmitting signaling 1.
For the user that descending local formula transfer of data is arranged,, improve the performance of transfer of data if control signaling that can uplink scheduling is relevant in the transmitted over resources of the local formula transmission of downlink data, so just can be utilized the frequency selective scheduling gain.
And for the user that descending distributed data transmission is only arranged, owing to can't utilize the frequency selective scheduling gain, and, its distributed data transmits because transmitting on the distributed sub-carrier that only limits in certain frequency range, if therefore ascending scheduling control signaling is transmitted on the distributed resource of transmitting downlink data, the frequency diversity transmission gain of its acquisition is limited.If can dispose the ascending scheduling assignment channel of independently sharing (S-SGCH) that some have better frequency diversity effect, so just ascending scheduling assignment can be controlled signaling and transmit therein and can obtain bigger frequency diversity gain.It should be noted that and independently sharing ascending scheduling assignment channel ascending scheduling assignment control signaling, UE ID also needs indication.Based on this, the present invention has provided transmission ascending scheduling assignment control method for transmitting signaling 2.Provide the performing step of these two kinds of transmission methods below respectively.
The operating procedure of the base station in ascending scheduling assignment that the inventive method the proposed control method for transmitting signaling 1 is as shown in Figure 2:
The ascending scheduling assignment channel (S-SGCH) 201 shared of base station configuration at first, if subscriber equipment is not known the channel Mapping information of the shared control channel that the base station disposes, the base station also needs the channel Mapping information notifying user equipment of the ascending scheduling assignment channel of sharing that will be disposed, the method of notice can be to utilize broadcast channel broadcasts, also can be to notify by high-level signaling.
When needs are done the transmitting uplink data scheduling to subscriber equipment, the base station will judge whether that the user who is scheduled has downlink data transmission 202, if do not have, this user's ascending scheduling assignment control signaling 204 will be transmitted in the base station on 201 S-SGCH that disposed so, will transmit scheduling assignment signaling 203 on some specific subcarrier if having so in the running time-frequency resource of transmitting downlink data.
After having sent scheduling assignment control signaling, the base station will dispatch the upstream data 205 that receives this user's transmission on the running time-frequency resource for this subscriber equipment.
Wherein in the step 203,, will on local formula running time-frequency resource, transmit ascending scheduling assignment control signaling so if the running time-frequency resource of user device transmissions downlink data is local formula running time-frequency resource; If the running time-frequency resource of user device transmissions downlink data is distributed running time-frequency resource, will on distributed running time-frequency resource, transmit ascending scheduling assignment control signaling so.
The ascending scheduling assignment control signaling of transmitting in the method for transmitting and scheduling assignment control signaling proposed by the invention can the HARQ signaling relevant with uplink be transmitted together, also can transmit respectively.That is to say that the upstream control signaling that transmits in the inventive method can comprise the relevant HARQ signaling of uplink, also can not comprise the relevant HARQ signaling of uplink.
The difference of the content basis transmission means of scheduling assignment control signaling and difference:
The content that the ascending scheduling assignment control signaling of transmitting in the ascending scheduling assignment channel of sharing comprises is:
● subscriber equipment identifier (UE ID): be used to indicate the subscriber equipment that is scheduled;
● institute's scheduled resources assignment: be used to indicate the frequency resource of distributing to the scheduled user;
● transmitting uplink data form indication information: the restriction that is used to indicate transmitting uplink data form or transformat.
● the duration (Duration): be used to indicate the duration of institute's Resources allocation, this control information is optional.
● cyclic redundancy check bits: the cyclic redundancy check (CRC) that is used to control signaling.
The content that the ascending scheduling assignment control signaling of transmitting on the specific subcarrier in the downlink data transmission running time-frequency resource comprises is:
● institute's scheduled resources assignment: be used to indicate the frequency resource of distributing to the scheduled user;
● transmitting uplink data form indication information: the restriction that is used to indicate transmitting uplink data form or transformat.
● the duration (Duration): be used to indicate the duration of institute's Resources allocation, this control information is optional.
● cyclic redundancy check bits: the cyclic redundancy check (CRC) that is used to control signaling.
The ascending scheduling assignment control signaling that the ascending scheduling assignment control signaling of transmitting in second kind of transmission means is as can be seen transmitted with respect to first kind of mode does not need to indicate the identifier of subscriber equipment, this is because the ascending scheduling assignment signaling of transmitting on the running time-frequency resource of distributing for certain user is just given this user's ascending scheduling control signaling, therefore there is no need in ascending scheduling control signaling the identifier of transmission user equipment again.
The upstream control signaling that transmits in the inventive method can be a kind of transformat according to its content that comprises, and also can be multiple transformat.
The transmission means of transmission ascending scheduling assignment control signaling can have following 3 kinds on some specific subcarrier in the running time-frequency resource of step 203 base station in transmitting downlink data:
First kind is no matter whether ascending scheduling assignment control signaling is arranged, and the position that is used to transmit the subcarrier of ascending scheduling assignment control signaling in the resource of transmitting downlink data is all reserved all the time.If ascending scheduling assignment control signaling is arranged, ascending scheduling assignment control signaling will be transmitted on the subcarrier of reserving so.If no, the subcarrier of these reservations will be empty so.
The second way is only when the transmission of ascending scheduling assignment control signaling is arranged, and just can reserve specific subcarrier and be used to transmit ascending scheduling assignment and control signaling in the resource of transmitting downlink data, and data will be in the location transmission except that these subcarriers.
The third mode is to transmit on the subcarrier of data in the resource of all transmitting downlink data, and when the transmission of ascending scheduling assignment control signaling is arranged, the base station will be in specific sub-carrier positions punching, destroy the data bit that on carrier wave, transmits at these, and be used for transmitting ascending scheduling assignment control signaling.
Transmission ascending scheduling assignment control signaling on some specific subcarrier in the running time-frequency resource of step 203 base station in transmitting downlink data.Described specific sub-carrier positions depends on the employed Resource Block of downlink data transmission or the number of virtual resource blocks, that is to say that the position of described specific subcarrier can be according to the number N of employed Resource Block of downlink data transmission or virtual resource blocks
dCalculate, as the following formula shown in:
P
SC(i)＝f(N
d) (1)
In addition, if the upstream control signaling of transmission has multiple transformat, so described specific sub-carrier positions is except outside the Pass the number with the employed Resource Block of downlink data transmission has, also depend on the transformat of ascending scheduling control signaling, that is to say that the position of described specific subcarrier can be according to the number N of the employed Resource Block of downlink data transmission
dTransformat TF with ascending scheduling control signaling
UCCalculate, as the following formula shown in:
P
SC(i)＝f(N
d，TF
UC) (2)
For three kinds of modes on some specific subcarrier, transmitting ascending scheduling assignment control signaling in the step 203, wherein second kind and the third mode will be according to the transformats of resource block number that is distributed and control signaling, determine to send the position that ascending scheduling assignment is controlled the specific subcarrier of signaling, and will be according to resource block number that is distributed and maximum transformat for the third mode
(containing the maximum form of signaling bit number) determines to send the position that ascending scheduling assignment is controlled the specific subcarrier of signaling.
Subscriber equipment respective phases of operation in ascending scheduling assignment that the inventive method the proposed control method for transmitting signaling 1 is as shown in Figure 3:
At first subscriber equipment is known the channel Mapping information 301 of the ascending scheduling assignment channel of sharing that the base station disposes, the method of knowing can be the channel Mapping information of the ascending scheduling assignment channel of sharing that is fixed up that the base station disposed by standard, also can be to know by receiving broadcast channel broadcasts information, can also be to know by receiving high-level signaling.
Afterwards, subscriber equipment will receive descending control signaling 302 in down control channel, and judge whether this user's downlink data transmission resource assignation 303, if do not have, so subscriber equipment will be in the shared ascending scheduling assignment channel that the base station disposed receiving scheduling assignment signaling 305; If have, subscriber equipment can detect ascending scheduling assignment control signaling 304 when receiving downlink transmission data in the running time-frequency resource in transmitting downlink data so.
After subscriber equipment has received the ascending scheduling assignment signaling, subscriber equipment will judge whether the transmitting uplink data resource assignation 306 to this user, if do not have, subscriber equipment continues to receive descending control signaling 302 so; If have, so subscriber equipment will be on the ascending resource that is distributed transmit ascending data 307.
Wherein, in step 304, subscriber equipment can some the specific subcarrier in the running time-frequency resource of transmitting downlink data on receiving scheduling assignment signaling, described specific sub-carrier positions is by the employed Resource Block of downlink data transmission or the number N of virtual resource blocks
dTransformat TF with ascending scheduling assignment control signaling
UCMeter is determined to determine according to formula 1 or formula 2.Subscriber equipment can receive the number N that descending control signaling is known employed Resource Block of downlink data transmission or virtual resource blocks by step 302
d
If ascending scheduling assignment control signaling has multiple transformat:
If indicated the form TF of ascending scheduling control signaling in the descending control signaling
UC, subscriber equipment has received descending control signaling and just can determine the residing sub-carrier positions of ascending scheduling control signaling so;
And if do not indicate TF in the descending control signaling
UC, subscriber equipment will be to each ascending scheduling control signaling form TF so
UCHave a go at the decoding of ascending scheduling control signaling on the determined different sub-carrier positions, up to the correct control signaling that has received uplink scheduling, just the method with so-called blind Detecting receives ascending scheduling control signaling.
It should be noted that, in step 304, there is not UE ID in the ascending scheduling control signaling that subscriber equipment detects, subscriber equipment is just given in descending control signaling on the subcarrier specific in the own downlink data transmission resource of being distributed and is detected ascending scheduling control signaling, if can be correct detect ascending scheduling control signaling, just thinking has ascending scheduling assignment to this user, if can not detect, so just thinking does not have to give this user's ascending scheduling assignment.
In step 304, the subscriber equipment difference of the transmission means of transmission ascending scheduling assignment control signaling and difference on some specific subcarrier in the mode of downlink data receiving will be according to the running time-frequency resource of base station in the step 203 in transmitting downlink data:
For first kind of send mode in the step 203, subscriber equipment will carry out the downlink data that demodulation obtains transmitting to the subcarrier that being used to of reserving transmits outside the subcarrier of ascending scheduling assignment control signaling.
For the second way in the step 203, at first subscriber equipment can be determined the subcarrier of transmission ascending scheduling assignment control signaling according to the transformat of resource block number that is distributed and control signaling, then information transmitted on these subcarriers is decoded, if can correctly solve ascending scheduling assignment control signaling, so the subcarrier outside the subcarrier that is used to transmit ascending scheduling assignment control signaling is carried out the downlink data that demodulation obtains transmitting; If do not control signaling and correctly solve ascending scheduling assignment, will carry out the downlink data that demodulation obtains transmitting to all subcarriers in the transfer resource so.
For the third mode in the step 203, at first subscriber equipment can be determined the subcarrier of transmission ascending scheduling assignment control signaling according to the transformat of resource block number that is distributed and control signaling, then information transmitted on these subcarriers is decoded, if can correctly solve ascending scheduling assignment control signaling, so just the data of being transmitted be carried out the downlink data that demodulation obtains transmitting according to the mode that is perforated according to determined sub-carrier positions; If do not control signaling and correctly solve ascending scheduling assignment, will carry out the downlink data that normal demodulation obtains transmitting to all subcarriers so.
And in step 305, subscriber equipment will detect the transmission of the UE ID whether oneself is arranged in the ascending scheduling assignment control channel of sharing, if detected, thinking so has the ascending scheduling assignment of oneself, if detect less than, so just not have ascending scheduling assignment to oneself.
The operating procedure of the base station in ascending scheduling assignment that the inventive method the proposed control method for transmitting signaling 2 is as shown in Figure 4:
A plurality of shared ascending scheduling assignment channels (S-SGCH) 401 of base station configuration at first.If subscriber equipment is not known the channel Mapping information of the shared control channel that the base station disposes, the base station also needs the channel Mapping information notifying user equipment of the ascending scheduling assignment channel of sharing that will be disposed, the method of notice can be to utilize broadcast channel broadcasts, also can be to notify by high-level signaling.
When needs are done the transmitting uplink data scheduling to subscriber equipment, the base station will judge whether that the user who is scheduled has downlink data transmission 402 on local formula resource, if do not have, this user's ascending scheduling assignment control signaling 404 will be transmitted in the base station on 401 S-SGCH that disposed so, will transmit scheduling assignment signaling 403 on some specific subcarrier if having so in the local formula running time-frequency resource of transmitting downlink data.
After having sent scheduling assignment control signaling, the base station will dispatch the upstream data 405 that receives this user's transmission on the running time-frequency resource for this subscriber equipment.
From top step as can be seen, method 2 is with the difference of method 1, in step 402 and step 403, only when this subscriber equipment has descending local formula transfer of data, just can in giving the downlink resource of these user device transmissions data, transmit ascending scheduling control signaling, if and this user has only the distributed downlink transfer of data, will on S-SGCH, transmit ascending scheduling control signaling so, and, therefore in the ascending scheduling control signaling of transmission, also to transmit UE ID owing to be on shared channel, to transmit.
The ascending scheduling assignment of transmission control signaling can the HARQ signaling relevant with uplink be transmitted together in method 2, also can transmit respectively.That is to say that the upstream control signaling that transmits in the inventive method can comprise the relevant HARQ signaling of uplink, also can not comprise the relevant HARQ signaling of uplink.
The difference of the content basis transmission means of scheduling assignment control signaling and difference:
The content that the ascending scheduling assignment control signaling of transmitting in the ascending scheduling assignment channel of sharing comprises is:
● subscriber equipment identifier (UE ID): be used to indicate the subscriber equipment that is scheduled;
● institute's scheduled resources assignment: be used to indicate the frequency resource of distributing to the scheduled user;
● transmitting uplink data form indication information: the restriction that is used to indicate transmitting uplink data form or transformat.
● the duration (Duration) (if necessary): the duration that is used to indicate institute's Resources allocation.
● cyclic redundancy check bits: the cyclic redundancy check (CRC) that is used to control signaling.
The content that the ascending scheduling assignment control signaling of transmitting on the specific subcarrier in the local formula running time-frequency resource of downlink data transmission comprises is:
● institute's scheduled resources assignment: be used to indicate the frequency resource of distributing to the scheduled user;
● transmitting uplink data form indication information: the restriction that is used to indicate transmitting uplink data form or transformat.
● the duration (Duration) (if necessary): the duration that is used to indicate institute's Resources allocation.
● cyclic redundancy check bits: the cyclic redundancy check (CRC) that is used to control signaling.
The ascending scheduling assignment control signaling that the ascending scheduling assignment control signaling of transmitting in second kind of transmission means is as can be seen transmitted with respect to first kind of mode does not need to indicate the identifier of subscriber equipment, this is because the ascending scheduling assignment signaling of transmitting on the running time-frequency resource of distributing for certain user is just given this user's ascending scheduling control signaling, therefore there is no need in ascending scheduling control signaling the identifier of transmission user equipment again.
The upstream control signaling that transmits in the inventive method can be a kind of transformat according to its content that comprises, and also can be multiple transformat.
The transmission means of transmission ascending scheduling assignment control signaling can have following 3 kinds on some specific subcarrier in the local formula running time-frequency resource of step 403 base station in transmitting downlink data:
First kind is no matter whether ascending scheduling assignment control signaling is arranged, and the position that is used to transmit the subcarrier of ascending scheduling assignment control signaling in the local formula resource of transmitting downlink data is all reserved all the time.If ascending scheduling assignment control signaling is arranged, ascending scheduling assignment control signaling will be transmitted on the subcarrier of reserving so.If no, the subcarrier of these reservations will be empty so.
The second way is only when the transmission of ascending scheduling assignment control signaling is arranged, just can in the local formula resource of transmitting downlink data, reserve specific subcarrier and be used to transmit ascending scheduling assignment control signaling, and data will be in the location transmission except that these subcarriers.
The third mode is to transmit on the subcarrier of data in the local formula resource of all transmitting downlink data, and when the transmission of ascending scheduling assignment control signaling is arranged, the base station will be in specific sub-carrier positions punching, destroy the data bit that on carrier wave, transmits at these, and be used for transmitting ascending scheduling assignment control signaling.
Transmission ascending scheduling assignment control signaling on some specific subcarrier in the running time-frequency resource of step 403 base station in transmitting downlink data.Described specific sub-carrier positions depends on the employed Resource Block of downlink data transmission or the number of virtual resource blocks, that is to say that the position of described specific subcarrier can be according to the number N of employed Resource Block of downlink data transmission or virtual resource blocks
dCalculate, as shown in Equation (1).
In addition, if the upstream control signaling of transmission has multiple transformat, so described specific sub-carrier positions is except outside the Pass the number with the employed Resource Block of downlink data transmission has, also depend on the transformat of ascending scheduling control signaling, that is to say that the position of described specific subcarrier can be according to the number N of the employed Resource Block of downlink data transmission
dTransformat TF with ascending scheduling control signaling
UCCalculate, as shown in Equation (2).
For three kinds of modes on some specific subcarrier, transmitting ascending scheduling assignment control signaling in the step 403, wherein second kind and the third mode will be according to the transformats of local formula resource block number that is distributed and control signaling, determine the position of the specific subcarrier of transmission ascending scheduling assignment control signaling, and will come definite position that sends the specific subcarrier of ascending scheduling assignment control signaling according to local formula resource block number that is distributed and maximum transformat (containing the maximum form of signaling bit number) for the third mode.
Subscriber equipment respective phases of operation in ascending scheduling assignment that the inventive method the proposed control method for transmitting signaling 2 is as shown in Figure 5:
At first subscriber equipment is known the channel Mapping information 501 of the ascending scheduling assignment channel of sharing that the base station disposes, the method of knowing can be the channel Mapping information of the ascending scheduling assignment channel of sharing that is fixed up that the base station disposed by standard, also can be to know by receiving broadcast channel broadcasts information, can also be to know by receiving high-level signaling.
Afterwards, subscriber equipment will receive descending control signaling 502 in down control channel, and judge whether this user's descending local formula data transmission resources assignment 503, if not so subscriber equipment will be in the shared ascending scheduling assignment channel that the base station disposed receiving scheduling assignment signaling 505; If have, subscriber equipment can detect ascending scheduling assignment control signaling 504 when receiving downlink transmission data in the local formula running time-frequency resource in transmitting downlink data so.
After subscriber equipment has received the ascending scheduling assignment signaling, subscriber equipment will judge whether the transmitting uplink data resource assignation 506 to this user, if do not have, subscriber equipment continues to receive descending control signaling 502 so; If have, so subscriber equipment will be on the ascending resource that is distributed transmit ascending data 507.
The difference of method 2 and method 1 is as can be seen, subscriber equipment has received after the control signaling, only when subscriber equipment has descending local formula data transmission resources, just can on the specific subcarrier on the running time-frequency resource of transmission data, receive the control signaling of uplink scheduling domination.And if this user is when having only the distributed downlink data transmission resources, this user will receive ascending scheduling assignment control signaling on S-SGCH, and to control to detect on the signaling whether its UE ID is arranged at this, to differentiate the ascending scheduling assignment whether this subscriber equipment is arranged.
Wherein, in step 504, subscriber equipment can some the specific subcarrier in the running time-frequency resource of transmitting downlink data on receiving scheduling assignment signaling, described specific sub-carrier positions is by the employed Resource Block of downlink data transmission or the number N of virtual resource blocks
dTransformat TF with ascending scheduling assignment control signaling
UCMeter is determined to determine according to formula 1 or formula 2.Subscriber equipment can receive the number N that descending control signaling is known employed Resource Block of downlink data transmission or virtual resource blocks by step 502
d
If ascending scheduling assignment control signaling has multiple transformat:
If indicated the form TF of ascending scheduling control signaling in the descending control signaling
UC, subscriber equipment has received descending control signaling and just can determine the residing sub-carrier positions of ascending scheduling control signaling so;
And if do not indicate TF in the descending control signaling
UC, subscriber equipment will be to each ascending scheduling control signaling form TF so
UCHave a go at the decoding of ascending scheduling control signaling on the determined different sub-carrier positions, up to the correct control signaling that has received uplink scheduling, just the method with so-called blind Detecting receives ascending scheduling control signaling.
It should be noted that, in step 504, there is not UE ID in the ascending scheduling control signaling that subscriber equipment detects, subscriber equipment is just given in descending control signaling on the subcarrier specific in the own downlink data transmission resource of being distributed and is detected ascending scheduling control signaling, if can be correct detect ascending scheduling control signaling, just thinking has ascending scheduling assignment to this user, if can not detect, so just thinking does not have to give this user's ascending scheduling assignment.
In step 504, the subscriber equipment difference of the transmission means of transmission ascending scheduling assignment control signaling and difference on some specific subcarrier in the mode of downlink data receiving will be according to the local formula running time-frequency resource of base station in the step 403 in transmitting downlink data:
For first kind of send mode in the step 403, subscriber equipment will carry out the downlink data that demodulation obtains transmitting to the subcarrier that being used to of reserving transmits outside the subcarrier of ascending scheduling assignment control signaling.
For the second way in the step 403, at first subscriber equipment can be determined the subcarrier of transmission ascending scheduling assignment control signaling according to the transformat of resource block number that is distributed and control signaling, then information transmitted on these subcarriers is decoded, if can correctly solve ascending scheduling assignment control signaling, so the subcarrier outside the subcarrier that is used to transmit ascending scheduling assignment control signaling is carried out the downlink data that demodulation obtains transmitting; If do not control signaling and correctly solve ascending scheduling assignment, will carry out the downlink data that demodulation obtains transmitting to all subcarriers in the transfer resource so.
For the third mode in the step 403, at first subscriber equipment can be determined the subcarrier of transmission ascending scheduling assignment control signaling according to the transformat of resource block number that is distributed and control signaling, then information transmitted on these subcarriers is decoded, if can correctly solve ascending scheduling assignment control signaling, so just the data of being transmitted be carried out the downlink data that demodulation obtains transmitting according to the mode that is perforated according to determined sub-carrier positions; If do not control signaling and correctly solve ascending scheduling assignment, will carry out the downlink data that normal demodulation obtains transmitting to all subcarriers so.
And in step 505, subscriber equipment will detect the transmission of the UE ID whether oneself is arranged in the ascending scheduling assignment control channel of sharing, if detected, thinking so has the ascending scheduling assignment of oneself, if detect less than, so just not have ascending scheduling assignment to oneself.
The present invention gives the hardware of the ascending scheduling assignment transmission method base station that realization proposes and realizes block diagram, as shown in Figure 6:
As can be seen from the figure, in the base station from the data of high level through 603 transmit buffers, 602 data channel encoders, 601 user data transmission devices send to subscriber equipment.In the transmission data, scheduler also can be controlled 603 transmit buffers and 601 user data transmission devices, to realize the scheduling to downlink data transmission.
The base station also produces ascending scheduling control signaling at scheduler 604, and is input to 605 control information makers, and then is input to 606 channel encoders.According to method proposed by the invention, scheduler 604 also can be according to current downlink data dispatching situation, whether downlink data transmission or descending local formula transfer of data are promptly arranged, according to the method that the present invention proposes the output of 606 channel encoders is controlled, with the ascending scheduling control signaling of determining output is to import into to 607 control signaling transmitters, and the uplink scheduling control channel through sharing sends to subscriber equipment; Still import in 601 user data transmission devices, on the resource of transmitting downlink data or the local formula transmitted over resources ascending scheduling control signaling of transmitting downlink data.
The present invention gives the hardware of the ascending scheduling assignment transmission method subscriber equipment that realization proposes and realizes block diagram, as shown in Figure 7:
As can be seen from the figure, subscriber equipment utilizes the descending control signaling of 701 control signaling receivers receptions from the base station, through 702 channel decoders, pass to 703 control signaling identifiers and identify whether the data of transmitting from the downlink data transmission or the descending local formula of base station are arranged, and recognition result passed to 704 controllers, if do not have downlink data transmission or descending local formula transfer of data, base station controller will be controlled 701 control information receivers and the shared ascending scheduling assignment channel of 702 channel decoders reception so, and by 703 control information identifiers identification ascending scheduling control signaling; And if downlink data transmission or descending local formula transfer of data are arranged, the base station will be controlled 705 user data receivers and the ascending scheduling assignment information signal that transmits on the specific subcarrier in the downlink data transmission is passed to 702 channel decoders decode so, and pass to 703 control information identifiers identification ascending scheduling control signaling.
Embodiment
For the inventive method is described, provide the embodiment of the inventive method below.
For the base station end, when determining to send ascending scheduling assignment in base station sometime to certain user, the base station will at first judge whether current have descending local formula transfer of data or downlink data transmission, if descending local formula transfer of data or downlink data transmission are arranged, so the base station will be on sub-carrier positions specific on the local formula running time-frequency resource of the running time-frequency resource of transmitting downlink data or downlink data transmission ascending scheduling assignment control signaling.
According to the proposed method 1, if descending local formula data transmission resources is arranged, so will be in local formula transmitted over resources ascending scheduling assignment control signaling, and if do not have local formula data transmission resources and the distributed data transfer resource arranged, will on distributed resource, transmit so.And if do not have downlink data transmission, will on S-SGCH, transmit so.
And according to the proposed method 2, if descending local formula data transmission resources is arranged, so will be in local formula transmitted over resources ascending scheduling assignment control signaling, and if do not have local formula data transmission resources, will on S-SGCH, transmit so.
In realization, the scheduling assignment channel of sharing that the base station disposed can be to transmit on the subcarrier of distributed (distributed).Purpose with the distributed sub-carrier transmission is to obtain bigger frequency diversity gain.
Provide the example of determining these specific subcarrier positions below, at first provide in method 1 and the method 2 example in the specific sub-carrier positions of local formula transmitted over resources.
At first the base station can be transmitted in the specific OFDM symbol of each frame, for example, the base station can be in the later OFDM symbol of second OFDM symbol transmission uplink scheduling resource assignation.Suppose in the subframe (sub-frame) and can transmit 6 OFDM symbols, one have 5 OFDM symbols and can use later on since second OFDM symbol so, and comprise 25 subcarriers in a wireless resource block, so according to the number (N of base station to the local formula wireless resource block of the transmitting downlink data of user equipment allocation
Dl) just can calculate subcarrier number total in second OFDM symbol:
N
t＝5*25*N
dl
These subcarriers can be sorted in two ways, a kind of mode is the frequency domain direction ordering, and another kind of mode is the ordering of time domain direction.The N that supposed certain user equipment allocation
Dl=3 local formula Resource Block transmitting downlink data can provide schematic diagram that frequency domain direction ordering and time domain direction sort as shown in Figure 8 so.
Among the figure, RB1, the position of RB2 and RB3 is just as an example, RB1 in fact, the order of RB2 and RB3 can also sort according to the size that subscriber equipment is reported CQI value, that is to say in three Resource Block, the CQI value of RB1 maximum, RB2 takes second place, the RB3 minimum.
The position ordering of subcarrier has been arranged, just can determine the sub-carrier positions of transmission ascending scheduling assignment control signaling with certain rule.The simplest a kind of mode is exactly according to the required number of sub carrier wave of transmission ascending scheduling assignment control signaling, takes out successively from sub-carrier positions 0 beginning.Such as the required number of sub carrier wave of transmission ascending scheduling assignment control signaling is N
SC, the position P that so just can determine to transmit ascending scheduling assignment control signaling is as follows:
P(i)＝i，(i＝0，1，2，...，N
SC-1)
If ascending scheduling assignment control signaling has multiple transformat TF
UC, it is also different to transmit the required number of sub carrier wave of ascending scheduling assignment control signaling so, and its corresponding sub-carrier positions is also different.Such as two kinds of transformat TF are arranged
UC1And TF
UC2, and they transmit needed number of sub carrier wave and are respectively N
SC1And N
SC2, according to top mode, the ascending scheduling control signaling of first kind of form transmission can be 0 to N
SC1Transmit on-1 the sub-carrier positions, and the ascending scheduling control signaling of second kind of form transmission can be 0 to N
SC2Transmit on-1 the sub-carrier positions.
If according to method proposed by the invention 1,, so also will in the distributed resource of transmitting downlink data, transmit the ascending scheduling assignment signaling if subscriber equipment has only the distributed resource of transfer of data so.The Resource Block that the virtual resource blocks (VRB) of giving user equipment allocation can be regarded as said method so just can be used above-mentioned method equally and determine the sub-carrier positions of transmission ascending scheduling assignment control signaling.
If the base station, will have been transmitted ascending scheduling assignment control signaling so not in the transmitted over resources ascending scheduling assignment signaling of transmitting downlink data on the S-SGCH that is disposed.
The embodiment that the rule that the subcarrier ordering rule has been arranged and determined the sub-carrier positions of transmission ascending scheduling assignment control signaling, the transmitted over resources ascending scheduling assignment that just can be given in transmitting downlink data are controlled signaling as shown in Figure 9.Wherein, the rule of subcarrier ordering such as the time domain ordering rule among Fig. 8, and the rule of determining the sub-carrier positions of transmission ascending scheduling assignment control signaling is according to the required number of sub carrier wave of transmission ascending scheduling assignment control signaling, takes out successively since the sub-carrier positions 0 of the 2nd OFDM symbol.The number of sub carrier wave of the ascending scheduling assignment of supposition transmission here control signaling is N
SC
Provide the base station below respectively and control the embodiment of three kinds of modes of signaling according to the transmission ascending scheduling assignment on the running time-frequency resource of transmitting downlink data in step 203 or the step 403.
Assuming base stations as the resource that downlink data transmission distributes is 3 RB, RB1, RB2 and RB3 as shown in Figure 9:
No matter whether mode 1, base station have ascending resource assignation control signaling when being the downlink data transmission Resources allocation, all can reserve the N as shown in Fig. 9 (a)
SCIndividual subcarrier is used for the transmission of downlink resource assignment control signaling, and downlink data will be at RB1, removes the N that reserves among RB2 and the RB3
SCTransmit on the subcarrier outside the individual subcarrier.
In mode 1, no matter whether the base station have the transmission of ascending scheduling assignment control signaling in the resource of transmitting downlink data when the transmission data, and N all can and be removed according to the big or small of downlink data transmission piece in the base station in the rate-matched module
SCThe number of remaining subcarrier carries out rate-matched outside the individual subcarrier, and then transmits.
Mode 2, base station only when ascending resource assignation control signaling is arranged, just can reserve the N shown in mode 2 among Fig. 9 (b) when being the downlink data transmission Resources allocation
SCIndividual subcarrier is used for the transmission of downlink resource assignment control signaling, and this moment, downlink data will be at RB1, removes the N that reserves among RB2 and the RB3
SCTransmit on the subcarrier outside the individual subcarrier.If there is not ascending resource assignation control signaling, the base station will be transmitted on all subcarriers that distribute for downlink data transmission so.
In mode 2, the base station is in transmission during data, if when the transmission of ascending scheduling assignment control signaling is arranged in the resource of transmitting downlink data, N will and be removed according to the size of downlink data transmission piece in the base station in the rate-matched module
SCThe number of remaining subcarrier carries out rate-matched outside the individual subcarrier, and then transmits.And if when in the resource of transmitting downlink data, not having the transmission of ascending scheduling assignment control signaling, the base station is in the rate-matched module, will carry out rate-matched according to the number of sub carrier wave in the big or small of downlink data transmission piece and the downlink data transmission resource of being distributed, and then transmission.
Mode 3, base station when being the downlink data transmission Resources allocation, all subcarrier transmitting datas that the base station will be in the downlink data transmission resource of being distributed.And as ascending scheduling assignment control signaling conveying type, the base station will be in Fig. 9 (c) N shown in the mode 3
SCDestroy the data of being transmitted on the individual sub-carrier positions, and the transmission ascending scheduling assignment is controlled signaling on these subcarriers.And if do not have
In mode 3, the base station is when the transmission data, whether no matter ascending scheduling assignment control signaling arranged, and rate-matched all can be carried out according to the number of sub carrier wave in the big or small of downlink data transmission piece and the downlink data transmission resource of being distributed in the base station in the rate-matched module.Just when ascending scheduling assignment control signaling was arranged, the data of position shown in the figure will be struck off and be used to transmit ascending scheduling assignment control signaling.
Provide the method for subscriber equipment identification ascending scheduling assignment control signaling among the embodiment below, at first subscriber equipment receives descending control signaling, just can determine whether downlink data transmission or descending local formula transfer of data has not been arranged, and can determine the position and the number of local employed downstream transmission blocks of formula transfer of data (Radio Block) of downlink data transmission or downlink data or virtual resource blocks (VRB), and then just can determine to have known that according to the rule of determining transmission ascending scheduling assignment control signaling subcarrier the transmission ascending scheduling assignment controlled the position of signaling.According to the rule of determining transmission ascending scheduling assignment control signaling sub-carrier positions in the present embodiment noted earlier, promptly control the transformat TF of signaling according to ascending scheduling assignment
UCDetermined number of sub carrier wave N
SC, chooser carrier wave on the subcarrier of transmitting downlink data or descending local formula data successively, subscriber equipment just can determine to transmit the sub-carrier positions of ascending scheduling assignment control signaling so, and it has been decoded.
If, ascending scheduling assignment control signaling has multiple form and subscriber equipment not to receive the transformat indication of ascending scheduling assignment control signaling, subscriber equipment will be decoded successively to the sub-carrier positions that all forms are determined so, control signaling up to the ascending scheduling assignment that solves that can be correct, just ascending scheduling assignment control signaling is decoded with the method for so-called blind Detecting.
If subscriber equipment does not have downlink data transmission or descending local formula transfer of data, this user's ascending scheduling assignment control signaling will be transmitted in S-SGCH so, therefore subscriber equipment will be decoded to all S-SGCH, whether detecting, this user's UE ID transmits in certain S-SGCH, and the S-SGCH that its UE ID is arranged decoded, solve ascending scheduling assignment control signaling.
The hardware that provides base station transmits ascending scheduling assignment control signaling in the embodiment of the invention is below realized block diagram, as shown in figure 10.
The base station is by scheduler 1011 control buffers 1010, to encode/interweave 1009 through data channel from the data of high level, rate-matched 1008, modulation 1007, data channel mapping 1006, OFDM modulation 905, add Cyclic Prefix 904, steering D/A conversion 903, radio frequency sending set 1002, antenna 1001 sends to subscriber equipment.
In addition, mode according to three kinds of base station control channels in the downlink data transmission resource described in Fig. 9, scheduler 1011 is also used three kinds of different modes described above and is controlled 1008 rate-matched modules downlink data transmission is controlled, and determines the transmission means of downlink data.
From the ascending scheduling control signaling of data channel mapping block 1006 or 1016 outputs of control channel mapping block, also to add Cyclic Prefix 1004 through OFDM modulation 1005, steering D/A conversion 1003, radio frequency sending set 1002, antenna 1001 sends to subscriber equipment.
Subscriber equipment receives the hardware realization block diagram of ascending scheduling assignment control signaling in the embodiment of the invention, as shown in figure 11.
Subscriber equipment passes through reception antenna 1101, radio-frequency transmitter 1102, and Cyclic Prefix 1104 is removed in mould/number conversion 1103, and OFDM demodulation 1105 receives the channel of transmission data and the channel of control channel.The control channel of transmitting downlink control signal is through control channel mapping 1116, and rate-matched 1114 is separated in demodulation 1115, separates chnnel coding/deinterleaving 1113,1112 control information identifiers, passes to controller 1111.Controller just can know whether this subscriber equipment has downlink data transmission or descending local formula transfer of data at present.If do not have, controller will be controlled control channel mapping block 1116, S-SGCH to the transmission scheduling control signaling of downlink carries out channel Mapping, and by demodulation 1115, separate rate-matched 1114, separate chnnel coding/deinterleaving 1113,1112 control information identifiers, obtain ascending scheduling assignment control signaling, in controller 1111, differentiate whether the UEID of this subscriber equipment is arranged to judge whether this user's ascending scheduling assignment; If downlink data transmission or descending local formula transfer of data are arranged, controller 1111 is with control data channel Mapping module 1106 so, channel to the transmission data carries out channel Mapping, and pass to demodulation 1115, separate rate-matched 1114, separate chnnel coding/deinterleaving 1113,1112 control information identifiers, obtain ascending scheduling assignment control signaling, pass to controller 1111.
In addition, mode according to three kinds of base station control channels in the downlink data transmission resource described in Fig. 9, controller 1111 is also used three kinds of different modes described above and is controlled 1118 patterns of separating rate-matched module butt joint rate-matched and control, to solve the data of downlink transfer.
Claims (24)
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| CNA2006101151019A CN101132204A (en) | 2006-08-21 | 2006-08-21 | Transmission method and equipment for uplink scheduling assignment |
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Application publication date: 20080227 |