CN102905361A - Timing method and device under multi-carrier situation - Google Patents
Timing method and device under multi-carrier situation Download PDFInfo
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- CN102905361A CN102905361A CN2011102139725A CN201110213972A CN102905361A CN 102905361 A CN102905361 A CN 102905361A CN 2011102139725 A CN2011102139725 A CN 2011102139725A CN 201110213972 A CN201110213972 A CN 201110213972A CN 102905361 A CN102905361 A CN 102905361A
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Abstract
The embodiment of the invention discloses a timing method under the multi-carrier situation. The timing method under the multi-carrier situation is characterized in that the method comprises the following steps that: when a base station sends data through more than two downlink carriers, one downlink carrier is taken as a reference carrier, and the timing deviation amount of other downlink carriers relative to the reference carrier is determined according to the position of UE (user equipment) relative to the base station; and the base station regulates the time for sending the data to the UE when downlink data is transmitted according to the timing deviation amount of the downlink carrier of the base station relative to the reference carrier. According to the invention, downlink data from different downlink carriers are prevented from interfering mutually at the UE side in the carrier accumulating occasion.
Description
Technical field
The present invention relates to the multi-transceiver technology field, relate in particular to timing method and equipment under a kind of multicarrier situation.
Background technology
In the LTE system, for the TDD system, its frame structure as shown in Figure 1.
Fig. 1 is the frame structure schematic diagram of TDD system.
As shown in Figure 1, a radio frames comprises two fields, 10 subframes, and namely each field comprises 5 subframes, and wherein, each radio frames equals 10ms, and each subframe equals 1ms.In 10 subframes of radio frames, comprise descending sub frame, sub-frame of uplink and special subframe, describe below in conjunction with the sub-frame configuration in pair of one radio frames of table 1.
Table 1: the sub-frame configuration in radio frames
By as seen from Table 1, the dependence time is distinguished the uplink and downlink transmission by the TDD system.
In LTE R8/9 version, for some UE, have a timing relationship between the transmission of uplink and downlink subframe: namely for certain UE, at first receive the descending sub frame that the base station issues, after having experienced the time of downlink transfer, in the time of need to carrying out uplink, this moment the sub-frame of uplink that the up-link wireless frame can send take needs time as benchmark, on this basis, shift to an earlier date (N
TA+ N
TAoffset) moment of Ts is defined as the initial time of corresponding up-link wireless subframe.
Fig. 2 is the timing relationship schematic diagram between the transmission of uplink and downlink subframe.
As shown in Figure 2, when UE sends upstream data at radio frames i, at first identify frame boundaries and the boundary of time slot of radio frames according to the downlink radio frame before the up-link wireless frame i, then according to the frame boundaries of this up-link wireless frame i, shift to an earlier date (N
TA+ N
TAoffset) Ts begins to send upstream data second.
Wherein, 0≤N
TA≤ 20512, N
TABy the base station by signaling to UE; For FDD, N
TAoffset=0; For TDD, N
TAoffset=624; T
s=1/ (15000 * 2048).
In LTE R10 version, carrier aggregation technology has been introduced in the up-downgoing transmission.In the scene of carrier aggregation, for base station and UE, all descending carriers adopt identical timing relationship, namely the initial time of the radio frames of all descending carriers is identical, timing relationship between up-link carrier and the descending carrier is determined according to timing relationship shown in Figure 2, therefore, all up-link carriers also adopt identical timing relationship.
Fig. 3 is a kind of concrete application scenarios schematic diagram in the scene of carrier aggregation.
As shown in Figure 3, in this concrete application scenarios, the overlay area of the overlay area of macro base station F1 and little base station F2 overlaps, user equipment (UE) 1 just in time is in the coincidence overlay area of F1 and F2, therefore UE1 can use carrier aggregation technology, namely can utilize simultaneously F1 and F2 to carry out the uplink and downlink data transfer.
Suppose that UE1 receives the downlink data of F1 at descending carrier 1, receive the downlink data of F2 at descending carrier 2, according to present technical scheme, descending carrier 1 needs to adopt identical timing relationship with descending carrier 2, be that macro base station F1 sends downlink data in the identical moment to UE1 with little base station F2, because the distance of macro base station F1 and UE1 differs larger with the distance of little base station F2 and UE1, therefore will cause the downlink data of macro base station F1 transmission and the downlink data of little base station F2 transmission can't arrive simultaneously UE1, and probably surpass the scope that general cyclic prefix (CP) allows, in the UE1 side, cause the downlink data phase mutual interference of downlink data with the little base station F2 of macro base station F1, and then affect the performance of UE1 downlink data receiving.
Summary of the invention
In view of this, the invention provides timing method and equipment in a kind of carrier aggregation scene, can so that the downlink data that different descending carrier issues within the scope that CP allows, and then avoid in carrier aggregation scene, from the phase mutual interference in the UE side of the downlink data of different descending carriers.
Technical scheme of the present invention specifically is achieved in that
Timing method under a kind of multicarrier situation, the method comprises:
When sending data in the base station by plural descending carrier, take one of them descending carrier as reference carrier, with respect to the position that sends the base station of data to this UE, determine that other descending carriers are with respect to the timing offset of this reference carrier according to UE;
The base station with respect to the timing offset of described reference carrier, is adjusted the time that sends data to this UE according to self descending carrier.
A kind of base station equipment, this base station equipment comprises time block and sending module;
Described time block, when being used in the base station by plural descending carrier transmission data, take one of them descending carrier as reference carrier, according to the position of UE with respect to this base station equipment, determine that the descending carrier of base station equipment is with respect to the timing offset of this reference carrier;
Described sending module is used for adjusting the time that sends data to this UE according to the descending carrier of this base station equipment self timing offset with respect to described reference carrier.
As seen from the above technical solution, among the present invention, when the base station sends data by plural descending carrier, take one of them descending carrier as reference carrier, with respect to the position that sends the base station of data to this UE, determine that other descending carriers are with respect to the timing offset of this reference carrier according to UE; The base station with respect to the timing offset of described reference carrier, is adjusted the time that sends data to this UE according to self descending carrier.Thereby, so that UE downlink data that receive by different descending carrier, on the same subframe almost arrives simultaneously UE, thereby has avoided from the downlink data on the different descending carriers in the mutual interference of UE side phase.
Description of drawings
Fig. 1 is the frame structure schematic diagram of TDD system.
Fig. 2 is the timing relationship schematic diagram between the ascending-descending subframes.
Fig. 3 is a kind of concrete application scenarios schematic diagram in the scene of carrier aggregation.
Fig. 4 is the timing method flow chart in the carrier aggregation scene provided by the invention.
Fig. 5 is the timing relationship schematic diagram of descending carrier provided by the invention.
Fig. 6 is the timing relationship schematic diagram of up-link carrier provided by the invention.
Fig. 7 is the structure chart of base station equipment provided by the invention.
Embodiment
Fig. 4 is the timing method flow chart in the carrier aggregation scene provided by the invention.
As shown in Figure 4, the method comprises:
Wherein, when the base station sent data by plural descending carrier, the frequency range of this plural descending carrier can be identical, also can be different.
As seen, by method shown in Figure 4, can determine the timing relationship of plural descending carrier, and so that when sending downlink data by plural descending carrier to UE according to this timing relationship, can be so that the downlink data on the same subframe almost arrive UE simultaneously, thus avoid owing to the downlink data on the same subframe can not arrive the UE side downlink data phase mutual interference that UE causes simultaneously.
For example, in application scenarios shown in Figure 3, according to UE with respect to the position of macro base station F1 and position with respect to little base station F2, suppose take descending carrier 1 as reference carrier, can determine descending carrier 2 with respect to the timing offset of descending carrier 1, then little base station F2 adjusts the time that sends downlink data to this UE according to this timing offset, thereby so that the downlink data on the same subframe that little base station F2 and macro base station F1 send almost arrives UE simultaneously, namely within the scope that CP allows, thereby avoid from the phase mutual interference in the UE side of the downlink data of different base station.
In the UE side, synchronizing signal according to each descending carrier, can determine boundary of time slot and the subframe border of each carrier wave, then according to the uplink and downlink time slot proportion of each carrier wave, determine the timing relationship of each up-link carrier corresponding with descending carrier, so that UE is adjusted at the time of transmit ascending data on the up-link carrier.
Particularly, the base station can be according to the uplink timing advance TA value and the timing offset of other descending carriers with respect to this reference carrier of reference carrier, determine the uplink timing advance TA value of described other carrier waves, the uplink timing advance TA value of each carrier wave is issued UE; UE adjusts the time that this UE sends upstream data according to the uplink timing advance TA value of each carrier wave.
User equipment (UE) can be determined boundary of time slot and the subframe border of each descending carrier according to the synchronizing signal of each descending carrier; Then according to the uplink and downlink time slot proportion of each carrier wave, determine the sub-frame of uplink border of up-link carrier; Then be handed down to the uplink timing advance TA value of each carrier wave of UE according to the base station, be adjusted at the time of transmit ascending data on each up-link carrier.
Determine the timing relationship of the timing relationship of descending carrier and up-link carrier according to the present invention after, can also determine and stride accordingly carrier scheduling method.Particularly:
When bear control information on the subframe n at descending carrier, when being used for the communication of other descending carriers beyond this descending carrier of control, this control information specifically is used for controlling the communication of the subframe n on described other descending carriers.In other words, bear control information on the subframe of descending carrier, this control information is used for the communication of the subframe of other descending carriers beyond this descending carrier of control, and it is identical with the numbering of controlled subframe to carry the numbering of subframe of this control information.
When bear control information on the subframe n at descending carrier, when being used for the communication of control up-link carrier, this control information specifically is used for the communication of the subframe n+k of control up-link carrier, k wherein is definite according to the uplink and downlink time slot proportion, specifically can be referring to table 2 about the value of k.
The value of k under the different uplink and downlink time slot proportion of table 2
Below in conjunction with accompanying drawing, the timing relationship of descending carrier provided by the invention and the timing relationship of up-link carrier are carried out exemplary illustration, given example is not limited to the present invention.
Fig. 5 is the timing relationship schematic diagram of descending carrier provided by the invention.
As shown in Figure 5, CC1 and CC
iBe descending carrier, wherein CC1 is reference carrier, then CC
iTiming offset with respect to reference carrier CC1 is
Second, descending carrier CC
iThe initial time of downlink radio frame i compare with the initial time of the downlink radio frame i of descending carrier CC1, stepped back
Second.
Parameter wherein
Can be at descending carrier CC
iWhen being activated, be handed down to UE by the high-level signaling of base station by descending carrier CC1.
By adopting the present invention to determine timing relationship between the descending carrier for UE, can guarantee that the transmission of a plurality of descending carriers arrives UE simultaneously, reduced the data buffer storage amount of UE, also reduced the complexity of UE deal with data.
Fig. 6 is the timing relationship schematic diagram of up-link carrier provided by the invention.
As shown in Figure 6, for reference carrier CC1, the up timing offset TA value of CC1 is determined in the base station according to the upward signal of this carrier wave that receives
For other carrier wave CCi, owing to when downlink transfer, carried out
Time adjust, illustrate that this base station is larger with the reference carrier gap from the distance of UE.So up timing offset TA value of CCi carrier wave
Can for
The base station is determined after the uplink timing advance TA value of each up-link carrier, just can send to UE to this value.UE determines subframe border and boundary of time slot according to the synchronizing signal on each descending carrier, then according to the uplink and downlink time slot proportion of each carrier wave, determine the frame boundaries of up-link wireless frame transmission, according to the up timing offset TA value of each carrier wave, adjust the transmission of upstream data again.
Need to prove: if UE uses two above carrier waves to carry out the transmission of upstream data, the base station also can only send the up timing offset TA value of up main carrier
With
Give UE, UE oneself calculates the up timing offset TA value of other carrier wave
Fig. 7 is the structure chart of base station equipment provided by the invention.
As shown in Figure 7, this base station equipment comprises time block 701 and sending module 702.
Sending module 702 is used for adjusting the time that sends data to this UE according to the descending carrier of this base station equipment self timing offset with respect to described reference carrier.
Sending module 702, be used for bear control information on the subframe n of descending carrier, this control information is used for the communication of the subframe n on this descending carrier of control other descending carriers in addition or is used for the communication of the subframe n+k of control up-link carrier, and k wherein determines according to the uplink and downlink time slot proportion.
Sending module 702 is used for when descending carrier is activated the descending carrier of this base station self being issued described UE with respect to the timing offset of reference carrier.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (11)
1. the timing method under the multicarrier situation is characterized in that the method comprises:
When sending data in the base station by plural descending carrier, take one of them descending carrier as reference carrier, according to the position of UE with respect to the base station, determine that other descending carriers are with respect to the timing offset of this reference carrier;
The base station with respect to the timing offset of described reference carrier, is adjusted the time that sends data to this UE according to self descending carrier.
2. method according to claim 1 is characterized in that, the method also comprises:
According to the uplink timing advance TA value and the timing offset of other descending carriers with respect to this reference carrier of reference carrier, determine the uplink timing advance TA value of other carrier waves;
UE adjusts the time that this UE sends upstream data according to the uplink timing advance TA value of each carrier wave.
3. method according to claim 2 is characterized in that,
The base station deducts described timing offset with the uplink timing advance TA value of reference carrier, and acquired results is defined as the uplink timing advance TA value of corresponding carriers, and UE is issued with the uplink timing advance TA value of each carrier wave in described base station.
4. method according to claim 2 is characterized in that,
The base station is issued UE with uplink timing advance TA value and other descending carriers of reference carrier with respect to the timing offset of this reference carrier, UE deducts described timing offset with the uplink timing advance TA value of reference carrier, acquired results is defined as the uplink timing advance TA value of corresponding carriers.
5. method according to claim 2 is characterized in that, the method also comprises:
UE is according to the synchronizing signal of each descending carrier, determine the numbering of each subframe in the initial time of radio frames of this descending carrier and the radio frames, according to the uplink and downlink time slot proportion of each carrier wave, determine the numbering of each subframe in the initial time of radio frames of this up-link carrier and the radio frames;
Bear control information on the subframe n of descending carrier, this control information is used for the communication of the subframe n on this descending carrier of control other descending carriers in addition or is used for the communication of the subframe n+k of control up-link carrier, and k wherein determines according to the uplink and downlink time slot proportion.
6. method according to claim 1 is characterized in that, the method also comprises:
When descending carrier was activated, the base station was issued described UE with the descending carrier of this base station self with respect to the timing offset of reference carrier.
7. a base station equipment is characterized in that, this base station equipment comprises time block and sending module;
Described time block, when being used in the base station by plural descending carrier transmission data, take one of them descending carrier as reference carrier, according to the position of UE with respect to this base station equipment, determine that the descending carrier of base station equipment is with respect to the timing offset of this reference carrier;
Described sending module is used for adjusting the time that sends data to this UE according to the descending carrier of this base station equipment self timing offset with respect to described reference carrier.
8. base station equipment according to claim 7 is characterized in that,
Described time block deducts described timing offset with the uplink timing advance TA value of reference carrier, and acquired results is defined as the uplink timing advance TA value of corresponding carriers, and the uplink timing advance TA value of each carrier wave is issued UE.
9. base station equipment according to claim 7 is characterized in that,
Described time block, uplink timing advance TA value and other descending carriers of reference carrier are issued UE with respect to the timing offset of this reference carrier, wherein, described UE deducts described timing offset with the uplink timing advance TA value of reference carrier, acquired results is defined as the uplink timing advance TA value of corresponding carriers.
10. base station equipment according to claim 7 is characterized in that,
Described time block, be used for the synchronizing signal according to each descending carrier, determine the numbering of each subframe in the initial time of radio frames of this descending carrier and the radio frames, according to the uplink and downlink time slot proportion of each carrier wave, determine the numbering of each subframe in the initial time of radio frames of this up-link carrier and the radio frames;
Described sending module, be used for bear control information on the subframe n of descending carrier, this control information is used for the communication of the subframe n on this descending carrier of control other descending carriers in addition or is used for the communication of the subframe n+k of control up-link carrier, and k wherein determines according to the uplink and downlink time slot proportion.
11. base station equipment according to claim 7 is characterized in that,
Described sending module is used for when descending carrier is activated the descending carrier of this base station self being issued described UE with respect to the timing offset of reference carrier.
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| CN201110213972.5A CN102905361B (en) | 2011-07-28 | 2011-07-28 | Timing method and device under multi-carrier situation |
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| CN201110213972.5A CN102905361B (en) | 2011-07-28 | 2011-07-28 | Timing method and device under multi-carrier situation |
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| CN104080159A (en) * | 2013-03-26 | 2014-10-01 | 中兴通讯股份有限公司 | Carrier transmission time setting method and communication system |
| WO2017028754A1 (en) * | 2015-08-17 | 2017-02-23 | 华为技术有限公司 | Carrier aggregation method and device |
| WO2018137574A1 (en) * | 2017-01-26 | 2018-08-02 | 华为技术有限公司 | Method of transmitting carrier information, base station, and terminal |
| CN109714829A (en) * | 2019-01-07 | 2019-05-03 | 腾讯科技（深圳）有限公司 | Method for transmission processing, device, equipment and storage medium |
| WO2019213940A1 (en) * | 2018-05-11 | 2019-11-14 | Oppo广东移动通信有限公司 | Relay system synchronization method and apparatus, and computer device and storage medium |
| CN110572877A (en) * | 2017-11-17 | 2019-12-13 | 华为技术有限公司 | Method and device for sending and receiving information |
| US10904051B2 (en) | 2017-01-26 | 2021-01-26 | Huawei Technologies Co., Ltd. | Method for sending carrier information, base station, and terminal |
| CN116155466A (en) * | 2023-01-17 | 2023-05-23 | 南京星思半导体有限公司 | Timing method and device for multi-carrier transmission and user equipment |
| WO2023221805A1 (en) * | 2022-05-20 | 2023-11-23 | 中兴通讯股份有限公司 | Communication method, base station-side device, network device and storage medium |
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| CN104080159A (en) * | 2013-03-26 | 2014-10-01 | 中兴通讯股份有限公司 | Carrier transmission time setting method and communication system |
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| US10904051B2 (en) | 2017-01-26 | 2021-01-26 | Huawei Technologies Co., Ltd. | Method for sending carrier information, base station, and terminal |
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| US11706728B2 (en) | 2018-05-11 | 2023-07-18 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Relay system synchronization method and apparatus, and computer device and storage medium |
| CN109714829B (en) * | 2019-01-07 | 2020-08-14 | 腾讯科技（深圳）有限公司 | Transmission processing method, device, equipment and storage medium |
| CN109714829A (en) * | 2019-01-07 | 2019-05-03 | 腾讯科技（深圳）有限公司 | Method for transmission processing, device, equipment and storage medium |
| WO2023221805A1 (en) * | 2022-05-20 | 2023-11-23 | 中兴通讯股份有限公司 | Communication method, base station-side device, network device and storage medium |
| CN116155466A (en) * | 2023-01-17 | 2023-05-23 | 南京星思半导体有限公司 | Timing method and device for multi-carrier transmission and user equipment |
| CN116155466B (en) * | 2023-01-17 | 2023-10-27 | 南京星思半导体有限公司 | Timing method and device for multi-carrier transmission and user equipment |
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