WO2013086677A1 - Communication method, base station and user equipment - Google Patents

Communication method, base station and user equipment Download PDF

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Publication number
WO2013086677A1
WO2013086677A1 PCT/CN2011/083849 CN2011083849W WO2013086677A1 WO 2013086677 A1 WO2013086677 A1 WO 2013086677A1 CN 2011083849 W CN2011083849 W CN 2011083849W WO 2013086677 A1 WO2013086677 A1 WO 2013086677A1
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Prior art keywords
ue
base station
tti
sfn
dst
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PCT/CN2011/083849
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French (fr)
Chinese (zh)
Inventor
王金灵
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华为技术有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission and use of information for re-establishing the radio link

Abstract

Disclosed are a communication method, a base station and a user equipment (UE). The method comprises: a first base station receiving a confirmation message of allowing a UE to perform handover sent by a second base station, the first base station being a base station controlling a source cell of the UE, and the second base station being a base station controlling a destination cell of the UE; the first base station sending a handover command to the UE, the handover command comprising a TTIdiff, the TTIdiff being a difference between a transmission time interval TTIdst of the second base station and a transmission time interval TTIsrc of the first base station. The method can avoid a CRC error caused by different understanding about configuration by the UE and the base station after the UE accesses the base station.

Description

Communication method, a base station apparatus and the user i Shu Field

The present invention relates to communication technologies, and particularly relates to a communication method, a base station and a user equipment. Background technique

In the LTE (Long Term Evolution, the English abbreviation for LTE) system, a user equipment (User Equipment, the English abbreviation for UE) through a non-initial random access procedure with a base station (Evolved NodeB, English abbreviation for eNB) to establish uplink synchronization and connection.

Non-initial random access procedure mainly includes a switching (Hand over, English abbreviation of the HO), for example: the UE receives the handover command sent by the source base station, and initiates a random access to the target cell according to the handover command; UE accesses the target cell after, i.e. handover is successful, the application does not depend on a system frame number (system frame number, English abbreviation for SFN) configuration, such period is less than 10 milliseconds (ms) is arranged, normal data transmission, and reception of the target cell the main system blocks (master Information block, English abbreviation for the MIB); then, UE adjusts its system frame number SFN in accordance with the system frame number SFN the MIB carried by the target cell, the UE to its own transmission time interval (transmission time interval, English abbreviated as TTI) retention and transmission time of the target cell in the same interval TTI d, UE after their SFN adjustment applications rely on the SFN configuration, for example: a period longer than the channel quality indication of 10ms (channel quality Indicator, English abbreviation for the CQI), scheduling request (scheduling request, English abbreviation for SR) and sounding reference symbols (sounding referenc e Symbol, the English abbreviation for SRS).

During the implementation of the present invention, the inventor finds at least the following problems in the prior art: the UE accesses the target cell itself to complete the adjustment of the TTI, i.e., after the UE receiving the MIB SFN adjusted, this time, can not be applied SFN configuration dependent. Thus, if the UE to the target base station transmits data during this time, and the UE transmits data in time to meet the CQI, SR, SRS period, the eNB will mistaken for data sent by the UE comprises the CQI, control information of the SR and SRS , thereby causing the cyclic redundancy check data (Cyclical redundancy check, abbreviation, CRC) error. SUMMARY

Embodiments of the present invention provide a communication method, a base station and a user equipment, UE can avoid a CRC error in the access base station, the base station and the UE of different configurations lead to understanding.

In one aspect the present invention provides a communication method, comprising:

Allows the user equipment UE handover acknowledgment message to the first base station receives second base station, the first base station control station of a source cell of the UE, the second base station is a UE, the base station controlling the target cell ;

The first base station transmits a handover command to the UE, the handover command comprises a TTI DLFF, the TTI DLFF the second base station as a transmission time interval TTI DST transmission time number of the first base station number interval TTU difference.

Another aspect the present invention provides a communication method, comprising:

The user equipment UE receives the handover command sent by a first base station, the handover command

Figure imgf000003_0001
ΤΉ the second base station is a transmission time interval TTI DST number and the first base station the transmission time difference between the number TTU interval; wherein, the source cell of the UE controlled by the first base station, the target UE the second base station controlling the cell the UE transmission time interval preclude the use of the TTI UE ID the same TTI SRC;

The UE according to the UE to adjust the transmission time interval by the UE TTId ^^ TTI and the number of the same Tintin ^ 1.

Another aspect the present invention provides a communication method, comprising:

The user equipment UE receives the handover command sent by a first base station, the handover command comprises ΤΤΙ, ΤΉ the transmission time interval of the second base station serial number TTU TTI DST difference between the first base station transmission time interval; wherein, a source cell of the UE controlled by the first base station, the target cell of the UE controlled by the second base station, the UE transmission time interval TTI SRC number TTIUE the same;

The TTI ^ f the UE and the UE determines the TTI of the UE target cell system frame number SFN dst according to; the contrary, if the UE to adjust UE the system frame number of the SFN to the UE, parity SFN dst the SFN UE, the adjustment will increase or decrease SFNui ^ an integral multiple of 10 ms the SFN UE.

Another aspect the present invention provides a base station, comprising:

A first receiver for receiving a second base station permits a user equipment UE handover confirmation message sent by the first base station control station of a source cell of the UE, the second base station to control the UE the base station of the target cell; and,

A first transmitter for transmitting a handover command to the UE, the handover command comprises a TTI DLFF, ΤΉ the transmission time interval to the second base station 171 ^ and serial transmission time interval of the first base station number TTU difference.

Another aspect the present invention provides a user equipment, comprising:

A second receiver for receiving a handover command sent by a first base station, the handover command comprises a TTI DLFF, the D! ! ^ Is the transmission time of the second base station, transmission time TTI DST number of the first base station number TTU interval difference interval; wherein, the source cell of the UE controlled by the first base station, the target cell by the UE controlling the second base station, the UE transmission time interval preclude the use of the TTI UE ID the same TTI SRC; and

A second processor for TTIUE and adjusted to the same TTI DST according to said transmission time interval TTI DLFF the UE number.

Another aspect the present invention provides a user equipment, comprising:

A third receiver for receiving a handover command sent by a first base station, the handover command comprises a TTI DLFF, the D! ! ^ Is the transmission time of the second base station transmission time number of the DST TTI interval with the first base sequence number difference S TTI interval; wherein, the source cell of the UE controlled by the first base station, the target cell of the UE controlling by said second base station, the UE transmission time interval and the number TTIUE same Tintin ^ 1;

A third processor, according to the TTI of the TTI DLFF the UE and the UE determines a target cell system frame number SFN dst, and the system frame number of the SFN to the UE if the UE SFN dst the opposite parity, the UE adjusts the SFN UE, the SFN of the adjustment means to increase or decrease the UE integer multiple of 10 ms the SFN UE.

Above technical solutions can be before the UE accesses the target cell, the target cell according to the transmission time interval to obtain interval TTI SRC TTI DST transmission time difference by subtracting the source cell TTI DLFF, the UE is adjusted to the target cell TTIUE the TTI DST - induced, or the UE determines a target cell SFN parity of the DST based on the TTI DLFF, the UE immediately after access to a target cell SFN configuration depends on the application, to avoid the UE and a base station of a different configuration understand CRC error. BRIEF DESCRIPTION

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings briefly described embodiments or the prior art needed to be used in the following embodiments will be apparent in the following description of the accompanying drawings are merely present invention Some embodiments of the present art ordinary skill, without creative efforts, can derive from these drawings other drawings.

FIG 1 is a flowchart of a communication method according to an embodiment of the present invention;

FIG 2 is a flowchart of a communication method according to another embodiment of the present invention;

FIG 3 is a flowchart of a communication method according to another embodiment of the present invention;

4, FIG. 5 another schematic structure of a base station according to an embodiment of the present invention;

6 another schematic structural diagram of a user apparatus embodiment of the present invention;

Figure 7 a schematic view of another structure of the user equipment according to an embodiment of the present invention.

detailed description

Below in conjunction with the accompanying drawings of the present invention in embodiments, the technical solutions in the embodiments of the present invention are clearly and completely described, obviously, the described embodiments are merely part of embodiments of the present invention rather than all embodiments. Based on the embodiments of the present invention, all other embodiments of ordinary skill in the art without any creative effort shall fall within the scope of the present invention.

To make advantage of the solution of the present invention more apparent, the present invention is below described in detail in conjunction with the accompanying drawings and embodiments.

In various embodiments of the present invention, the first base station controlling the source cell of the UE, the second base station controlling the target cell of the UE, i.e. a first source base station for the UE, the target base station for the second UE. For convenience of description, hereinafter, TTI src represents a transmission time interval of the first base station number, TTI dst indicates the transmission time interval of the second base station number, TTIUE represents a transmission time interval UE ID, or UE referred to preclude the use of the transmission interval number.

In various embodiments of the present invention, the number of transmission time interval TTI. No. English abbreviation may be, and determines a SFN X 10 + Subframe index, thereby indicating the position of the TTI, which system frame (also referred to as a radio frame) which sub-frame. Wherein, the SFN is [0, 1023) according to a value within the interval, Subframe index indicates the subframe number, is any value within [0, 9) section. Not repeat them later. Further, the base station determines the SFN brief (i.e., the current SFN) method: the base station absolute time minus the current second count (i.e. POSIX time) at 0:00:00 on January 1, 1970 to give the Thereafter, multiplied by 100 (10ms units), then modulo 1024, the value obtained is the current SFN of the base station.

One embodiment of the present invention provide a communication method, shown in Figure 1, the method comprising the following steps.

101, the first base station receives the acknowledgment message allows the user equipment UE transmits the handover the second base station.

Allowing the UE to handover acknowledgment message in this step may be understood to allow for instructing a user equipment UE handover confirmation message, or a handover request acknowledgment for the UE did.

102, a first base station transmits a handover command to the UE, the handover command

Figure imgf000006_0001
The TTI dlff said TTI ds ^ ττυ the difference.

Alternatively, the TTI dlff = TTI src + (T src - T dst) - TTI dst; wherein, T src system receives the acknowledgment message to the first base station to the first base station absolute time, 1 ^ is the second base station transmits the absolute time system handover confirm message to the second base station. Alternatively, Ding! ! ^ And! ^ Can be carried in the acknowledgment message, i.e. the first base station by receiving an acknowledgment message to obtain the TTI ds ^ pT dst.

Alternatively, if the first base station and the second base station absolute time synchronization, and the first base station to adjust the TTI src TTI dst and the phase synchronization, the D! ^^ is. .

Alternatively, the present embodiment further includes steps A and B. Wherein step A synchronizing said first base station and the second base station absolute time, step B to the first base station to adjust the ^ 171 ^ 171 and the phase synchronization.

Optionally, in step A, the first base station and the second base station absolute time for synchronizing is not limited to the following: using a global positioning system (Global Positioning System, the English abbreviation for GPS), or 1588V2 protocol, or network time protocol (network time protocol, the English abbreviation for NTP). For example, the first base station and the second base station the GPS receiver may be mounted, are synchronized with the GPS system time, in order to achieve the absolute time of the first and second base stations are synchronized.

Optionally, in step B, if the same transmission time so that the first base station and the second base station number of regular intervals, then absolutely the first base station and the second base station in step A manipulation under the premise of time synchronization, transmission time interval sequence number of the first base station and the second base station is the same, i.e. TTI SRC = TTI DST, it implements the phase synchronization.

Incidentally, Step B can be performed after step A, and Step A, Step B and Step 101 are not necessarily the order, step 102 is not necessarily the order. For example, the first base station can be synchronized with the second base station absolute time at power, the acknowledgment may be synchronized absolute time between the second base station sends a handover command message received , it can also be synchronized with the second base station absolute time after sending the handover command.

By the above technical solutions with the TTI DLFF handover command to the UE, the UE may adjust the TTI UE according to the UE or the SFN TTI DLFF, thus avoiding the base station and the UE CRC error different understanding of the configuration of the lead.

The following examples further introduce the TTI DIFF method for adjusting the SFN TTIUE or UE according to these embodiments may be combined with the above-described embodiment from the UE side Fig.

Another embodiment of the present invention to provide a communication method, shown in Figure 2, the method comprising:

201, the first UE receives a handover command from the base station, the handover command comprises ΤΉ, the TTI DLFF the TTI DST is the difference TTI S J; wherein, preclude the use of the UE in this step ( i.e. current) TTIUE the same Tintin ^ 1.

202, the UE according to the UE to adjust UE transmission time TTI DLFF the interval used in the step 201 preclude a TTI and the same Tintin ^ 1.

Optionally, the UE will preclude the use of the UE in step 201 and the TTIUE ΤΤΙ ^ taken and, as the value of the TTI and the UE, and the UE, i.e., the TTI of the new UE in the UE.

Alternatively, after step 202, the present embodiment further comprises the step of 203-205.

203, the UE accesses the target cell.

204, the UE SFN configuration depends on the application, for example, greater than the period of 10ms CQI, SR and SRS. Can be appreciated, the UE performs step 203 immediately after step 204, the present embodiment helps to achieve better results.

205, if the uplink grant, the UE transmits data to the second base station.

Alternatively, after step 204, the present embodiment further comprises a step 206.

206, the UE receives the main block of the second base station system transmits the MIB.

Above technical solution enables the UE to adjust UE according to the current TTI to TTI DLFF TTI ds ^ and the same, in order to avoid the base station and the UE CRC error understanding of different configurations result.

Another embodiment of the present invention to provide a communication method, shown in Figure 3, the method comprising:

301, the first UE receives a handover command from the base station, the handover command comprises ΤΉ, the TTI dlff TTI dst is the difference value of the TTU; wherein the UE preclude the use in this step (i.e. current) TTIUE the same Tintin ^ 1.

302, the system frame number SFN dst UE according to the UE and the TTI dlff preclude the target cell with TTIu ^ jl set of the UE in step 301.

303, if the system frame number of the SFN to the UE UE SFN dst opposite parity, the SFN to the UE adjusts the UE, the adjustment SFNui ^ UE to increase or decrease the SFN of the integer multiple of 10ms.

Alternatively, if the target cell of the UE physical random access channel (Physical Random Access Channel, the English abbreviation for PRACH) configuration (PRACH configuration) of the transmission cycle is 20ms, after step 303, the present embodiment further comprises the step of 304-306. A transmission cycle for the example of 20ms PRACH configuration for the configuration comprising: PRACH configurations 0, 1, 2, 15, 16, 17, 18, 31, 32, 33, 34, 47, 48, 49, 50 and 63. 304, the UE SFN UE by the adjustment to the second base station transmits the access preamble. It notes that this step is less than the TTI dlff 5ms networking requirements no longer there is a connection.

305, the UE accesses the target cell.

306, the UE SFN configuration depends on the application. For example, the period is longer than 10ms CQI, SR and SRS.

Alternatively, after step 305, the present embodiment further comprises the step of 307-308.

307, the UE receives the main block of the second base station system transmits the MIB.

308, the UE will SFN adjusted UE in step 303 is adjusted to the same target cell SFN dst.

Above technical solution enables the UE according to the TTId! Ff ^ off SFN ds ^ parity, and transmitted to the UE on the SFN SFN dst having the same parity of an access preamble period of 20ms, to avoid the UE and the base station CRC error leads to different understanding of the configuration of the base station and reduce the network requirements.

Incidentally, the communication method according to an embodiment of the present invention is applicable to a scene in a cell handover UE, but is not limited thereto.

Another embodiment of the present invention provides a base station, shown in Figure 4, the base station comprising: a first receiver 41 for receiving an acknowledgment message allows the user equipment UE to handover the second base station, the second a base station control station of a source cell of the UE, the second base station is a control target cell of the UE; and

First transmitter 42, for transmitting a handover command to the UE, the handover command comprises a TTI dlff, the TTI dlff transmission time interval of the second base station number D! ! ^ Transmission time interval with the first base sequence number J difference TTI S.

Alternatively, as shown in FIG. 5, the present embodiment provides a base station further includes: a first processor 43, for determining the TTI dlff according to the following equation: TTI dlff = TTI src + ( T src - T dst) - TTI dst; wherein T src system when the first base station receives the first acknowledgment message the base station absolute time, T ds ^ system handover the second base station transmits the absolute time second base station acknowledgment message.

Optionally, the first processor 43 is further configured to perform synchronization, and is adjusted to the 171 ^ 1 ^ Tintin and the phase synchronized with the second base station absolute time.

Wherein the first processor 43 is connected to the first transmitter 42, may also be connected to the first receiver 41. By the above-described first aspect of the transmitter 42 with the handover command ΤΉ to the UE, enables said UE according to the adjustment TTIUE ΤΤΙ or SFN UE, thus avoiding the base station and the UE CRC error different understanding of the configuration of the lead.

Base station according to the present embodiment may be provided for performing the operation method of the above-described embodiment provides a first base station performed, see the above embodiment will not be repeated here.

Another embodiment of the present invention, the UE provides a user equipment, as shown in Figure 6, the user equipment comprising:

A second receiver 61 for receiving a handover command sent by a first base station, the handover command comprises a TTI dlff, the D! ! Reference TTI dst ^ with the first base station the transmission time difference between the number TTU transmission time interval of the second interval of the base station; wherein the UE by the source cell of the first base station controlling the target cell from the UE controlling the second base station, the UE preclude the use of a transmission time interval UE ID the same as the TTI of the TTI src; and

A second processor 62, and for adjusting to the same TTI DST according to the TTI DLFF TTIUE the UE.

For example, the second processor 62 is specifically configured to: TTIUE of the UE and the TTI DLFF taken, and the D! ! And the values of ^ TTI dlff as a UE TTI UE.

Optionally, the second processor 62 is further configured to: access of the UE to the target cell; dependent on the application and the system frame number SFN configuration (e.g., a period longer than the CQI 10ms, SR, and the SRS), and If there is uplink grant to transmit data to the second base station.

Optionally, the second processor 62 is further configured to: receive a block of the second base station transmits the primary system of the MIB.

After the above technical solution enables the UE 61 is received by the second receiver DLFF TTI, UE 62 is adjusted by the second processor according to the current TTI to TTI DLFF TTI and the same dst, to avoid the UE and the base station causes different understanding of the configuration CRC errors. U ¾? ^ Butoxy operation, see the above-described embodiment, not further described herein.

Another embodiment of the present invention, the UE provides a user equipment, shown in Figure 7, the user equipment comprising:

Third receiver 71 for receiving a handover command sent by a first base station, the handover command comprises a TTI dlff, the D! ! Reference TTI dst ^ with the first base station the transmission time difference between the number TTU transmission time interval of the second interval of the base station; wherein the UE by the source cell of the first base station controlling the target cell from the UE control the second base station, a transmission time interval by the UE UE ID the same as the TTI of the TTI src; and

The third processor 72, for the TTI of the TTI dlff the UE and the UE determines a target cell SFN dst, and vice versa, according to the system frame number of the SFN UE if the UE and the SFN dst parity, the adjusting the UE SFN UE, the adjustment will increase or decrease SFNui ^ an integral multiple of 10 ms the SFN UE.

Alternatively, the third processor 62 is further configured to:

If the physical random access channel PRACH configuration transmission cycle of the UE to the target cell is 20ms, transmitting an access preamble to the second base station on the SFN UE adjusted, it does not depend on the first and second base stations absolute time difference is less than 5ms requirements of networking; when the UE accesses the target cell, SFN configuration depends on the application (e.g., a period longer than the CQI 10ms, SR, and the SRS); and if the uplink grant is present, the UE transmits data to the second base station.

Alternatively, the third processor 62 is further configured to: receive a block of the second base station transmits the primary system of the MIB; and 1 in accordance with the adjustment SFNu the MIB included in the target cell system frame number SFNd ^ jf to the whole SFN dst - induced.

Above technical solution enables the UE 72 determines parity based on the SFN dst TTI dlff through a third processor, and the SFN dst and having a transmission time interval of 20ms access preamble on the same parity SFN UE, to avoid the UE and the base station configuration results in different understandings of CRC errors, and to reduce the base station network requirements.

Action, see the above-described embodiments will not be repeated here.

Those of ordinary skill in the art may understand that the above-described method embodiments all or part of the processes may be related hardware instructed by a computer program, the program may be stored in a computer readable storage medium, the program when executed, the processes of the foregoing method embodiments. Wherein the storage medium may be a magnetic disk, an optical disk, read-only memory (Read-Only Memory, ROM), or random-hexyl, memory and ^ ^ (Random Access Memory, RAM) and the like.

The above are merely specific embodiments of the present invention, but the scope of the present invention is not limited thereto, any skilled in the art in the art within the scope of the invention disclosed can be easily thought variations or replacements, It shall fall within the scope of the present invention. Accordingly, the scope of the present invention should be defined by the scope of the claims.

Claims

Claims
A communication method, characterized by comprising:
Allows the user equipment UE handover acknowledgment message to the first base station receives second base station, the first base station control station of a source cell of the UE, the second base station is a UE, the base station controlling the target cell ;
The first base station transmits a handover command to the UE, the handover command comprises ΤΉ, the TTI DLFF second base station for said transmission time interval TTI DS ^ serial transmission time interval of the first base station number difference ττυ value.
2. The communication method according to claim 1, characterized in that,
The TTI DIFF = TTI SRC + (T SRC - T DST) - TTI DST;
Wherein said system base station receives the first acknowledgment message to the first base station absolute time T SRC, T DST to the second base station sends a handover acknowledgment message systems absolute time second base station.
3, communication method according to claim 1 or claim 2, wherein, if the first base station and the second base station absolute time synchronization, and the first base station and to the adjustment of the TTI SRC TTI DST said phase synchronization, the TTI DLFF is 0.
4. The communication method according to claim 3, characterized in that, said method further comprising: synchronizing said first base station and the second base station absolute time;
The first base station to adjust the 171 ^ and the TTI DST; ¾ row phase synchronization.
5. A communication method characterized by comprising:
The user equipment UE receives the handover command sent by a first base station, the handover command includes a transmission time interval TTI DLFF number, the second TTI DLFF TTI DST base station and the first base station number TTU interval difference; wherein, the source cell of the UE controlled by the first base station, the target cell of the UE controlled by the second base station, the UE preclude the use of a transmission time interval TTI SRC number TTIUE the same;
The UE and the UE is adjusted to the same TTI DST according to the transmission time of the UE TTI DLFF number interval TTI.
6. The communication method according to claim 5, wherein the UE the UE to adjust the TTI to TTI dst and the same comprising:
The TTIUE taken and the TTI DLFF and the TTIUE TTI UE and the value of the TTI DLFF as the UE.
7. The communication method according to claim 5 or claim 6, wherein the UE TTIUE adjusted to the same and after the TTI dst, further comprising:
The UE accesses the target cell;
Application of the UE depends on the system frame number SFN configuration;
If there is the uplink grant, the UE transmits data to the second base station.
8. The communication method according to claim 7, characterized in that, after the UE, the SFN configuration depends on the application, further comprising:
The UE receives the main block of the second base station system transmits the MIB.
9. A communication method according to claim 7 or claim 8, characterized in that, dependent on the SFN configuration comprising: a channel quality period longer than 10ms indicating the CQI, scheduling request and a sounding reference symbol SR SRS.
10. A communication method characterized by comprising:
The user equipment UE receives the handover command sent by the first base station, the handover command comprises a TTI dlff, the TTI dlff transmission time interval of the second base station ID and transmission time TTI dst the first base station number TTU interval difference; wherein, the source cell of the UE controlled by the first base station, the target cell of the UE controlled by the second base station, the UE transmission time interval and the number TTIUE 11 ^ same; the UE the TTI DLFF TTIUE and the UE determining system according to the frame number of a target cell SFN dst;
If the system frame number of the SFN to the UE UE SFN dst opposite parity, the SFN to the UE adjusts the UE, the adjustment SFNui ^ the SFN to the UE to increase or decrease an integer multiple of 10 ms.
11. The communication method according to claim 10, wherein a physical random target cell if the UE access channel PRACH configuration transmission cycle is 20 milliseconds, then the SFN to the UE adjusts the UE, the the method further comprises: the UE uses the SFN UE adjusted to the second base station transmitting an access preamble;
The UE accesses the target cell, and the SFN configuration depends on the application;
If there is the uplink grant, the UE transmits data to the second base station.
12. The communication method according to claim 11, wherein the UE accesses the target cell, and the SFN configuration depends on the application, the method further comprising:
The UE receives the main block of the second base station system transmits the MIB of the;
Adjusted to a target cell SFN DST same SFNUE the UE after the adjustment.
13. The communication method of claim 11 or claim 12, characterized in that, dependent on the configuration of the SFN comprising: a periodic channel quality than 10ms indicating the CQI, scheduling request and a sounding reference symbol SR SRS "
14. A base station, comprising:
A first receiver for receiving a second base station permits a user equipment UE handover confirmation message sent by the first base station control station of a source cell of the UE, the second base station to control the UE the base station of the target cell; and,
A first transmitter for transmitting a handover command to the UE, the handover command comprises a TTI dlff, the TTI dlff transmission time is the time interval the second base station number TTI dst interval with the first base station No. J difference TTI S.
15. The base station of claim 14, characterized in that, further comprising:
A first processor for determining in accordance with the following formula ΤΉ ώίϊ: TTI dlff = TTI src + (T src - T dst)
- TTIdst;
Wherein T src system when the first base station receives the first acknowledgment message the base station absolute time, T dst to the second base station sends a handover acknowledgment message systems absolute time second base station.
16. The base station as claimed in claim 14 or 15, wherein said first base station processor is further configured to perform synchronization, and the TTI src and the second base station absolute time integral ^ to the line and the TTI dst ii phase synchronization.
17, the UE A user equipment, characterized by comprising: a second receiver for receiving a handover command sent by a first base station, the handover command comprises ΤΉ, the D! ! ^ Is the transmission time of the second base station, transmission time TTI DST number of the first base station number TTU interval difference interval; wherein, the source cell of the UE controlled by the first base station, the target cell by the UE controlling the second base station, the UE transmission time interval preclude the use of the TTI UE ID the same TTI SRC; and
A second processor for TTIUE and adjusted to the same TTI DST according to said transmission time interval TTI DLFF the UE number.
18. The UE of claim 17, wherein said second processor is specifically for the TTIUE taken and the TTI DIFF and said sum value with the TTIUE as TTI DIFF the UE TTI UE.
19. The UE according to claim. 17 or claim 18, wherein said second processor is further configured to the UE to access the target cell, and application relies on a system frame number SFN configuration, and if present uplink grant to transmit data to the second base station.
20. The UE of claim 19, wherein said second processor is further for receiving the second base station host system transmits a block MIB.
21, the UE A user equipment, characterized by comprising:
A third receiver for receiving a handover command sent by a first base station, the handover command comprises ΤΉ, the D! ! ^ Is the transmission time of the second base station, transmission time TTI DST number of the first base station number TTU interval difference interval; wherein, the source cell of the UE controlled by the first base station, the target cell by the UE control the second base station, the UE a transmission time interval TTI SRC number TTIUE the same; and
A third processor configured to determine the UE according to the TTI DLFF TTIUE and the target cell system frame number SFN DST, and the system frame number of the SFN to the UE if the UE SFN DST opposite parity, the said adjusting the UE SFN UE, the adjustment means to increase or decrease SFNUE integer multiple of 10 ms the SFN UE.
22. The UE of claim 21, wherein, if the target cell of the UE physical random access channel PRACH configuration transmission cycle is 20 milliseconds, the third processor is further configured to use adjustment of the SFN UE sends an access preamble to the second base station, the UE accesses the target cell, and application relies on a system frame number of SFN configuration, and if the uplink grant is present, the UE transmits data to the second base station .
23, UE 21 or as claimed in claim 22, wherein the third processor is further configured to block the host system receives the MIB sent by the second base station; and SFN UE adjusted after the adjustment the same as the target cell SFN dst.
PCT/CN2011/083849 2011-12-12 2011-12-12 Communication method, base station and user equipment WO2013086677A1 (en)

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