CN101610110B - The method of system for accessing to multimedia broadcasting multicast, Apparatus and system - Google Patents

Abstract

Embodiments of the present invention provide a method for sending information, a method for accessing a multimedia broadcast multicast system, user equipment, a base station and a communication system, which can access an MBMS dedicated carrier system with uplink feedback. In the embodiment of the present invention, by mapping the synchronization channel carrying the identification information and the newly added additional synchronization channel into the frame structure, it provides the user equipment accessing the MBMS dedicated carrier system with uplink feedback. The cell identification information enables the user equipment to access the MBMS dedicated carrier system with uplink feedback.

Description

Method, device and system for accessing multimedia broadcast multicast system

technical field

The invention relates to wireless communication technology, in particular to a method, device and system for accessing a multimedia broadcast multicast system.

Background technique

During the synchronous access process, the system needs to be accessed through a synchronous channel. Generally, the synchronization channels include PSC (Primary Synchronization Channel, primary synchronization channel) and SSC (Secondary Synchronization Channel, secondary synchronization channel).

Usually, the synchronization channel is mapped on the center subcarrier of the OFDM (Orthogonal Frequency Division Multiplex, Orthogonal Frequency Division Multiplex) symbol of the subframe in the frame structure.

In one radio frame (radio frame), it usually includes 10 subframes (subframe) with a length of 1 ms. Wherein, when there is no uplink subframe in the subframe ratio and the uplink and downlink subframe ratio is 0:10, there is no conversion point in the system. The system may also adopt a subframe ratio with an uplink subframe, and there may be one or two uplink and downlink switching points within a 10ms period. The time slots at the uplink and downlink transition points may include downlink pilot time slots, guard time slots, and uplink pilot time slots.

As shown in FIG. 1 , it is a structure diagram of an LTE (Long Time Evolution, long-term evolution) TDD (Time Division Duplex, time division duplex) radio frame structure diagram with two uplink and downlink conversion points under 10 ms.

Among them, subframe #1 and subframe #6 are special subframes, which are composed of three parts: downlink pilot time slot (DwPTS), guard time slot (GP) and uplink pilot time slot (UpPTS). The lengths of the three slots constituting the special subframe can be changed.

When there is only one switching point in a 10ms subframe, the time domain length of one (subframe #6) special time slot DwPTS is 1 ms, and the length of the guard time slot and uplink pilot time slot is 0 ms. When there is no uplink subframe in the subframe ratio, and the uplink and downlink subframe ratio is 0:10, and there is no conversion point in the system, in subframe #1 and subframe #6, the downlink pilot slot length Can be 1ms.

As shown in Figure 2, it is the mapping of the synchronization channel to the LTE TDD frame structure shown in Figure 1 .

In Fig. 2, the mapping position in the case where the uplink and downlink subframe ratio of the primary synchronization channel and the secondary synchronization channel in the existing LTE TDD system is 1:8. The primary synchronization channel (PSC) is mapped on the center 72 subcarriers of the 3rd OFDM symbol in subframe #1 and subframe #6, while the secondary synchronization channel is mapped in the center of the last OFDM symbol in subframe #0 and subframe #5 on 72 subcarriers.

As shown in FIG. 3 , it is a structural diagram of an LTE FDD (Frequency Division Duplex, time division duplex) radio frame (radioframe).

One radio subframe includes two slots.

As shown in Figure 4, it is the mapping of the synchronization channel to the LTE FDD frame structure shown in Figure 3 .

In the FDD system, the primary synchronization channel PSC is mapped to the center 72 subcarriers of the last OFDM symbol in time slot #0 and time slot #10. The secondary synchronization channel SSC is mapped to the center 72 subcarriers of an OFDM symbol before the PSC.

However, when synchronously accessing an MBMS (Multimedia Broadcast Multicast Service, Multimedia Broadcast Multicast) dedicated carrier system, it can be accessed through two different downlink synchronous channels. For example, a primary synchronization channel dedicated to an SFA (Single Frequency Area, single frequency network area) and a secondary synchronization channel dedicated to an SFA are used. When synchronously accessing through the SFA-dedicated primary synchronization channel and the SFA-dedicated secondary synchronization channel, the user equipment can obtain the SFA identity during the synchronization process. In MBMS dedicated carrier systems, including MBSFN (Multicast Broadcast Single Frequency Network, multicast single frequency network), MIB (Master Information Block, master control information block) and pilot frequency can be scrambled exclusively by SFA. The pilot channel estimation can be performed through the obtained SFA identifier, and the MIB main control information block can be received. After obtaining the main control information block, the MBMS service is received, for example, operations such as reading a PMCH (Physical Multicast Channel) are performed.

Or access through the primary synchronization channel dedicated to a single cell and the secondary synchronization channel dedicated to a single cell. However, when accessing synchronously through the single-cell-dedicated primary synchronization channel and the single-cell-dedicated secondary synchronization channel, the user equipment can obtain the single-cell identity during the synchronization process.

But how to implement uplink feedback when accessing the MBMS dedicated carrier system.

Contents of the invention

Embodiments of the present invention provide a method for sending information, a method for accessing a multimedia broadcast multicast system, user equipment, a base station and a communication system, which can access an MBMS dedicated carrier system with uplink feedback.

The information sending method provided by the embodiment of the present invention includes:

Sending a synchronization channel carrying first identification information, where the first identification information is SFA identification information of a single frequency network area;

Sending an additional synchronization channel carrying second identification information, where the second identification information is single cell identification information; the single cell identification information provides user equipment accessing the MBMS dedicated carrier system with access to the MBMS dedicated carrier with uplink feedback Single cell information required by the system.

The method for accessing the multimedia broadcast multicast system provided by the embodiment of the present invention includes:

Receiving a synchronization channel, obtaining first identification information, and performing synchronization, the first identification information is SFA identification information of a single frequency network area; according to the first identification information, obtaining configuration information of a first pilot; receiving an additional synchronization channel, Acquiring second identification information, where the second identification information is single cell identification information; the single cell identification information provides user equipment accessing the MBMS dedicated carrier system with uplink feedback with the single cell required for accessing the MBMS dedicated carrier system with uplink feedback Cell information; according to the second identification information, acquire configuration information of the second pilot.

The user equipment provided by the embodiment of the present invention includes: a receiving unit 1, configured to receive a synchronization channel; an obtaining unit 1, configured to obtain first identification information from the received synchronization channel, and the first identification information is a single frequency network area SFA identification information; obtaining unit 2, used to obtain configuration information of the first pilot according to the first identification information; receiving unit 2, used to receive additional synchronization channels; obtaining unit 3, used to obtain additional synchronization from the received channel, to acquire second identification information, where the second identification information is single cell identification information; the single cell identification information provides user equipment accessing the MBMS dedicated carrier system with uplink feedback required for accessing the MBMS dedicated carrier system with uplink feedback The information of the single cell; the obtaining unit 4 is configured to obtain the configuration information of the second channel frequency according to the second identification information.

The base station provided by the embodiment of the present invention includes: sending unit 1, used to send the synchronization channel carrying the first identification information, the first identification information is the SFA identification information of the single frequency network area; sending unit 2, used to send the synchronization channel carrying the second An additional synchronization channel for identification information, the second identification information is single cell identification information; the single cell identification information provides user equipment accessing the MBMS dedicated carrier system with uplink feedback required for accessing the MBMS dedicated carrier system Single cell information.

The communication system provided by the embodiment of the present invention includes: a user equipment and a base station, wherein the base station is configured to send the synchronization channel carrying the first identification information and the additional synchronization channel carrying the second identification information to the user equipment; the user equipment Acquire the first identification information according to the received synchronization channel; the user equipment obtains the second identification information according to the received additional synchronization channel;

The first identification information is SFA identification information of a single frequency network area;

The second identification information is single cell identification information; the single cell identification information provides the user equipment accessing the MBMS dedicated carrier system with the information of the single cell required to access the MBMS dedicated carrier system with uplink feedback.

In the embodiment of the present invention, by mapping the synchronization channel carrying the identification information and the newly added additional synchronization channel in the frame structure, it provides the user equipment accessing the MBMS dedicated carrier system with uplink feedback. The cell identification information enables the user equipment to access the MBMS dedicated carrier system with uplink feedback.

Description of drawings

FIG. 1 is a structural diagram of an existing LTE TDD frame;

Fig. 2 is the mapping of synchronous channel in LTE TDD frame structure;

FIG. 3 is a structural diagram of an existing LTE FDD frame;

Fig. 4 is the mapping of synchronization channel in LTE FDD frame structure;

FIG. 5 is an additional synchronous channel mapping diagram according to an embodiment of the present invention;

FIG. 6 is a mapping diagram of an additional synchronization channel for a single cell according to an embodiment of the present invention;

FIG. 7 is a SFA additional synchronization channel mapping diagram according to an embodiment of the present invention;

FIG. 8 is a flow chart of accessing an MBMS system through an SFA synchronization channel according to an embodiment of the present invention;

FIG. 9 is a flow chart of accessing an MBMS system through a single-cell synchronization channel according to an embodiment of the present invention.

detailed description

The inventors of the present invention found that when accessing the MBMS dedicated carrier system through the SFA dedicated synchronization channel, the system can only provide the user equipment with information related to the SFA identity, but cannot provide the user equipment with information about the single cell identity of its uplink feedback cell. information. When the user equipment needs to perform service feedback in a single cell, it cannot correctly select parameters and send information, such as: random access sequence, cell power control required for uplink transmission, etc.

Although the user equipment can obtain information related to the identity of a single cell when using a single-cell dedicated synchronization channel to access the MBMS dedicated carrier system, it cannot obtain SFA-related identity information required for receiving MBMS services. Since the MBMS broadcast information is scrambled with the SFA identifier, the user equipment cannot receive the SFA broadcast information, resulting in the user equipment being unable to receive MBMS data.

In the embodiment of the present invention, in order to support the MBMS dedicated carrier system with uplink feedback, the required cell identification information is carried on the basis of the frame structure. The newly added additional synchronization channel can provide user equipment accessing the MBMS dedicated carrier system with cell identification information needed to access the MBMS dedicated carrier system with uplink feedback. The MBMS dedicated carrier system referred to in the embodiments of the present invention includes an MBSFN dedicated carrier system.

The method for sending information in the embodiment of the present invention includes sending a synchronization channel carrying SFA identification information or single cell identification information and an additional synchronization channel carrying single cell identification information or SFA identification information to the user equipment.

Wherein, the synchronization channel includes a primary synchronization channel and a secondary synchronization channel.

The synchronization channel and the additional synchronization channels are mapped onto radio frames prior to transmission.

As shown in FIG. 5, it is an additional synchronization channel mapping diagram of the embodiment of the present invention.

Wherein, in the embodiment of the present invention, an additional synchronization channel carrying identification information is added.

Wherein, the identification information may be single cell identification information, or SFA identification information.

The additional synchronization channel can be mapped to a fixed position in the radio frame, or a non-fixed position.

For example, the additional synchronization channel can be mapped to the downlink pilot time slot in the special subframe in the LTE TDD frame, and mapped to the n subcarriers at 15KHz intervals in the center of the downlink pilot time slot, which occupy the same space as the primary synchronization channel/secondary synchronization channel. the same frequency domain resources. In the time domain, the additional synchronization channel can be mapped on the 0th or 1st OFDM symbol of the downlink pilot slot, because in the existing special subframe configuration, these two OFDM symbols will only be used for downlink transmission . This additional synchronization channel can also be mapped to fixed time domain positions of other downlink subframes in the LTE TDD frame, so as to ensure that the user can completely receive the synchronization channel under the minimum system bandwidth.

When the additional channel is mapped on the LTE FDD frame, the additional synchronization channel can also be mapped to the fixed position of the central frequency domain resource of the subframe in the LTE FDD frame, so as to ensure that the user can completely receive the synchronization channel under the minimum system bandwidth.

If the additional synchronization channel is fixedly mapped to a specific position in the frame, the user equipment can go to the corresponding position to search for the identification information without notification.

If the position of the additional channel mapping in the frame is not fixed, the user equipment may be notified of its position. Alternatively, the user equipment is obtained through blind testing. The notification may notify the user equipment through separate signaling, such as the common channel of the MBMS subframe, to notify the user equipment. For example: broadcast channel through SFN (Single Frequency Network), or broadcast channel PBCH (Physical Broadcast Channel) in unicast mode, or dynamic broadcast channel DBCH (Dynamic-Broadcast Channel) in unicast mode or PMCH (Physical Multicast CHannel physical multicast channel) and other common channel signaling to notify all user equipments in the cell.

The additional synchronization channel carries identification information, which can provide identification information necessary for uplink feedback or service reception for user equipment accessing the MBMS dedicated carrier system. Thus, the uplink feedback when accessing the MBMS dedicated carrier system is realized.

As shown in FIG. 6, it is a mapping diagram of an additional synchronization channel for a single cell according to an embodiment of the present invention.

The present invention adds an additional synchronous channel for a single cell that can carry the identification information of a single cell during implementation. Provide relevant information such as a single cell identity for the user equipment accessing the cell through the SFA synchronization channel. The single-cell additional synchronization channel can be mapped to the downlink pilot time slot carrying downlink data in the special subframe in the LTE TDD subframe, and mapped to the center 72 subcarriers with 15KHz intervals occupying the same space as the primary synchronization channel/secondary synchronization channel frequency domain resources. In the time domain, the additional synchronization channel of a single cell can be placed on the 0th or 1st OFDM symbol of the downlink pilot slot, because in the configuration of the existing special subframe, these two OFDM symbols are only used for downlink transmission. The single-cell additional synchronization channel can also be mapped to a fixed position of the central frequency domain resources of other downlink subframes in the LTE TDD subframe, so as to ensure that the user can completely receive the synchronization channel under the minimum system bandwidth.

When the single-cell additional channel is mapped on the LTE FDD frame, the additional synchronization channel can also be mapped to the fixed position of the center frequency domain resources of the time slots of other subframes in the LTE FDD frame, so as to ensure that under the minimum system bandwidth, users can Receive sync channel in its entirety.

The single-cell additional synchronization channel may be mapped to a fixed position in a radio frame, or a non-fixed position. If the additional synchronization channel of the single cell is fixedly mapped to a specific position of the frame, the user equipment can go to the corresponding position to search for the identification information without notification.

If the location of the single-cell additional channel mapping in the frame is not fixed, the user equipment may be notified of its location. Alternatively, the user equipment is obtained through blind testing. The notification may notify the user equipment through separate signaling, such as the common channel of the MBMS subframe, to notify the user equipment. For example: broadcast channel through SFN (Single Frequency Network), or broadcast channel PBCH (Physical Broadcast Channel) in unicast mode, or dynamic broadcast channel DBCH (Dynamic-Broadcast Channel) in unicast mode or PMCH (Physical Multicast CHannel physical multicast channel), other common channel signaling to notify the user equipment.

The single-cell additional synchronization channel carries relevant information such as a single-cell identity, and can provide relevant information such as a single-cell identity necessary for uplink feedback for user equipment accessing the MBMS dedicated carrier system. Thus, the uplink feedback when accessing the MBMS dedicated carrier system is realized.

As shown in FIG. 7, it is a SFA additional synchronization channel mapping diagram of the embodiment of the present invention.

The embodiment of the present invention adds an SFA additional synchronization channel that can carry related information such as the SFA identifier. Provide relevant information such as SFA identifiers for user equipment accessing a cell through a single-cell synchronization channel. The SFA additional synchronization channel can be mapped to the downlink pilot time slot carrying downlink data in the special subframe of the LTE TDD subframe, and mapped to the center 72 subcarriers with 15KHz intervals occupying the same space as the primary synchronization channel/secondary synchronization channel. frequency domain resources. In the time domain, the SFA additional synchronization channel can be placed on the 0th or 1st OFDM symbol of the downlink pilot slot, because in the existing special subframe configuration, these two OFDM symbols will only be used for downlink transmission . The SFA additional synchronization channel can also be mapped to a fixed position of the central frequency domain resources of other downlink subframes in the LTE TDD subframe, so as to ensure that the user can completely receive the synchronization channel under the minimum system bandwidth.

When the SFA additional channel is mapped on the LTE FDD frame, the additional synchronization channel can also be mapped to the fixed position of the central frequency domain resources of the time slots of other subframes in the LTE FDD frame to ensure that the user can fully Receive sync channel.

The SFA additional synchronization channel may be mapped to a fixed position in a radio frame, or a non-fixed position. If the SFA additional synchronization channel is fixedly mapped to a specific position of the frame, the user equipment can go to the corresponding position to search for the identification information without notification.

If the position of the SFA additional channel mapping in the frame is not fixed, the user equipment may be notified of its position. Alternatively, the user equipment is obtained through blind testing. The notification may notify the user equipment through separate signaling, such as the common channel of the MBMS subframe, to notify the user equipment. For example: SFN (Single Frequency Network) mode broadcast channel, or unicast mode broadcast channel PBCH (Physical Broadcast Channel), or unicast mode dynamic broadcast channel DBCH (Dynamic-Broadcast Channel) or PMCH (Physical Multicast CHannel physical multiple broadcast channel), and other common channel signaling to notify the user equipment.

The SFA additional synchronization channel carries relevant information such as SAF identification, and can provide relevant information such as single cell identification necessary for receiving service data for user equipment accessing the MBMS dedicated carrier system. Thus, the uplink feedback when accessing the MBMS dedicated carrier system is realized.

Through the additional synchronization channel in the above embodiment, it is possible to access the MBMS dedicated carrier system with uplink feedback.

In the embodiment of the present invention, the user equipment receives the synchronization channel, obtains the first identification information, and performs synchronization; according to the first identification information, obtains the configuration information of the first pilot; receives the additional synchronization channel, and obtains the second identification information; according to the The second identification information is to obtain configuration information of the second pilot.

Wherein, the first identification information is SFA identification information, and the second identification information is single cell information; or, the first identification information is a single cell identification, and the second identification information is SFA identification information. The configuration information of the first pilot includes the first scrambling code, and the configuration information of the second pilot includes the second scrambling code. Synchronization channels include primary synchronization channels and secondary synchronization channels.

As shown in FIG. 8, it is a flow chart of accessing the MBMS system through the SFA synchronization channel according to the embodiment of the present invention.

801. The user equipment receives the SFA primary synchronization channel and the SFA secondary synchronization channel,

802. Obtain information related to the SFA identifier, perform SFA OFDM symbol synchronization, frequency offset estimation and correction, and frame synchronization;

803. The user equipment obtains the configuration information of the SFA pilot according to the SFA identifier, including the scrambling code. And receive and decode the content of the MIB main control information block, so as to obtain the basic information of the system, such as: system bandwidth, subframe ratio, whether there is uplink feedback, etc.;

804-805. If the user equipment needs to establish uplink transmission according to the information in the broadcast channel, the user equipment receives the additional synchronization channel of the single cell, and obtains information related to the identity of the single cell;

806. The user equipment obtains the configuration information of the single cell, including the scrambling code, according to the single cell identifier. The single-cell pilot signal is received according to the single-cell pilot configuration information, and power control for uplink feedback is performed by estimating the downlink single-cell pilot.

As shown in FIG. 9, it is a flow chart of accessing an MBMS system through a single-cell synchronization channel according to an embodiment of the present invention.

901. The user equipment receives a single-cell primary synchronization channel and a single-cell secondary synchronization channel;

902-903. Obtain information related to the identity of the single cell, perform OFDM symbol synchronization of the single cell, frequency offset estimation and correction, and frame synchronization;

904. The user equipment receives the SFA additional synchronization channel to obtain information related to the SFA identifier;

905. The user equipment obtains the configuration information of the SFA, including the scrambling code, according to the SFA identifier. And receive and decode the content of the MIB main control information block, so as to obtain the basic information of the system, such as: system bandwidth, subframe configuration, whether there is uplink feedback and other information.

906. If the user equipment needs to establish uplink transmission according to the information in the broadcast channel, the user equipment obtains single-cell pilot configuration information, including scrambling codes, according to the single-cell identifier. The single-cell pilot signal is received according to the single-cell pilot configuration information, and power control for uplink feedback is performed by estimating the downlink single-cell pilot.

The embodiment of the present invention also provides user equipment.

The user equipment includes: receiving unit 1, configured to receive a synchronization channel; obtaining unit 1, configured to obtain first identification information from the received synchronization channel; obtaining unit 2, configured to, according to the first identification information, Obtain the configuration information of the first pilot; the receiving unit 2 is used to receive the additional synchronization channel; the obtaining unit 3 is used to obtain the second identification information from the received additional synchronization channel; the obtaining unit 4 is used to obtain the second identification information according to the second Identification information to obtain the configuration information of the second channel.

Wherein, the synchronization channel includes a primary synchronization channel and a secondary synchronization channel. The configuration information of the pilot includes a scrambling code.

Wherein, the receiving unit 1 and the receiving unit 2 may be the same unit, and the acquiring units 1, 2, 3 and 4 may be the same unit, or several different units.

Wherein, the first identification information is SFA identification information of a single frequency network area, and the second identification information is single cell identification information; the first pilot configuration information is SFA pilot configuration information, including SFA scrambling code; the second pilot configuration information is Single-cell pilot configuration information; or the first identification information is single-cell identification information, and the second identification information is SFA identification information; wherein, the first pilot configuration information is single-cell pilot configuration information; the second pilot configuration information is SFA pilot configuration information.

The user equipment may also include an obtaining unit 5, which is used to obtain the pilot frequency according to the configuration information of the SFA pilot frequency, and then obtain the content of the main control information block, so as to obtain the basic information of the system, such as: system bandwidth, subframe configuration, whether There are uplink feedback and other information. The acquisition unit five and the acquisition units one, two, three and four may be the same unit, or several different units.

The user equipment further includes a processing unit configured to perform uplink feedback power control according to the single-cell pilot configuration information.

The embodiment of the present invention also provides a base station. The base station includes: a sending unit one, configured to send a synchronization channel carrying first identification information; a sending unit two, configured to send an additional synchronization channel carrying second identification information.

Wherein, the synchronization channel includes a primary synchronization channel and a secondary synchronization channel.

Wherein, the base station may also include a first mapping unit, configured to map the synchronization channel carrying the first identification information in the wireless frame; a second mapping unit, configured to map the additional synchronization channel carrying the second identification information in the wireless frame middle.

Wherein, the first identification information is single frequency network area SFA identification information, and the second identification information is single cell identification information; or, the first identification information is single cell identification information, and the second identification information is SFA identification information.

Wherein, the first sending unit and the second sending unit may be the same unit. The first mapping unit and the second mapping unit may be the same unit.

An embodiment of the present invention provides a communication system, including user equipment and a base station, wherein the base station is configured to send a synchronization channel carrying first identification information and an additional synchronization channel carrying second identification information to the user equipment; the user equipment receives The received synchronization channel obtains the first identification information; the user equipment obtains the second identification information according to the received additional synchronization channel. Wherein, the synchronization channel includes a primary synchronization channel and a secondary synchronization channel.

Wherein, the first identification information is single frequency network area SFA identification information, and the second identification information is single cell identification information; or, the first identification information is single cell identification information, and the second identification information is SFA identification information.

In the embodiment of the present invention, by mapping the synchronization channel carrying the identification information and the newly added additional synchronization channel in the frame structure, it provides the user equipment accessing the MBMS dedicated carrier system with uplink feedback. The cell identification information enables the user equipment to access the MBMS dedicated carrier system with uplink feedback.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (16)

1. A method for sending information, characterized in that the method comprises: Sending a synchronization channel carrying first identification information, where the first identification information is SFA identification information of a single frequency network area; Sending an additional synchronization channel carrying second identification information, where the second identification information is single cell identification information; the single cell identification information provides user equipment accessing the MBMS dedicated carrier system with access to the MBMS dedicated carrier with uplink feedback Single cell information required by the system. 2. The method of claim 1, further comprising, mapping the synchronization channel and the additional synchronization channel on a radio frame. 3. The method according to claim 2, wherein the mapping the additional synchronization channel on the wireless frame is specifically: mapping the additional synchronization channel on the downlink pilot time slot of a special subframe in the wireless frame , or at the position of the central frequency domain resource of the downlink subframe in the radio frame. 4. The method according to claim 2 or 3, further comprising: if the mapping position of the additional synchronization channel in the radio frame is not fixed, notifying the mapping position of the additional synchronization channel in the radio frame. 5. A method for accessing a multimedia broadcast multicast system, characterized in that the method comprises: Receiving a synchronization channel, acquiring first identification information, and performing synchronization, where the first identification information is SFA identification information of a single frequency network area; Acquiring configuration information of a first pilot according to the first identification information; the configuration information of the first pilot is SFA pilot configuration information; Receiving an additional synchronization channel, acquiring second identification information, where the second identification information is single cell identification information; the single cell identification information provides user equipment accessing the MBMS dedicated carrier system with access to the MBMS dedicated carrier with uplink feedback Single cell information required by the system; Acquiring configuration information of a second pilot according to the second identification information; the configuration information of the second pilot is single cell configuration information. 6. The method according to claim 5, wherein the synchronization channel comprises a primary synchronization channel and a secondary synchronization channel. 7. The method according to claim 5 or 6, further comprising, by receiving a single frequency network (SFN) mode broadcast channel, a unicast mode broadcast channel PBCH, a unicast mode dynamic broadcast channel DBCH, a physical multicast channel PMCH or other common channel signaling to obtain the mapping position of the additional synchronization channel in the radio frame; or obtain the mapping position of the additional synchronization channel in the radio frame through blind testing. 8. The method according to claim 5, further comprising: judging whether to establish uplink transmission, and if uplink transmission is to be established, receiving the additional synchronization channel. 9. The method according to claim 8, further comprising, according to the SFA pilot configuration information, acquiring the content of the main control information block. 10. The method according to claim 8, further comprising: receiving a single-cell pilot signal according to the single-cell pilot configuration information, and performing uplink feedback power control according to the single-cell pilot signal. 11. A user equipment, characterized in that, comprising: A receiving unit 1, configured to receive a synchronization channel; An obtaining unit 1, configured to obtain first identification information from the received synchronization channel, where the first identification information is SFA identification information of a single frequency network area; The obtaining unit 2 is configured to obtain configuration information of a first pilot according to the first identification information; the first pilot configuration information is SFA pilot configuration information; The second receiving unit is used to receive an additional synchronization channel; The acquiring unit 3 is configured to acquire second identification information from the received additional synchronization channel, where the second identification information is single cell identification information; the single cell identification information provides access for user equipment accessing the MBMS dedicated carrier system. Enter the information of a single cell required by the MBMS dedicated carrier system with uplink feedback; The obtaining unit 4 is configured to obtain configuration information of a second pilot according to the second identification information; the second pilot configuration information is single-cell pilot configuration information. 12. The user equipment according to claim 11, further comprising: The acquisition unit five is configured to acquire the content of the main control information block according to the SFA pilot configuration information. 13. The user equipment according to claim 11 or 12, further comprising: The processing unit is configured to perform uplink feedback power control according to the single-cell pilot configuration information. 14. A base station, characterized in that it comprises: A sending unit 1, configured to send a synchronization channel carrying first identification information, where the first identification information is SFA identification information of a single frequency network area; Sending unit 2, configured to send an additional synchronization channel carrying second identification information, where the second identification information is single cell identification information; the single cell identification information provides user equipment accessing the MBMS dedicated carrier system with access Information of a single cell required by the MBMS dedicated carrier system for uplink feedback. 15. The base station according to claim 14, further comprising a first mapping unit, configured to map the synchronization channel carrying the first identification information into a wireless frame; a second mapping unit, configured to The additional synchronization channel carrying the second identification information is mapped in the radio frame. 16. A communication system, comprising a user equipment and a base station, wherein the base station is configured to send a synchronization channel carrying first identification information and an additional synchronization channel carrying second identification information to the user equipment; the user equipment according to Obtain the first identification information from the received synchronization channel; the user equipment acquires the second identification information according to the received additional synchronization channel; The first identification information is SFA identification information of a single frequency network area; The second identification information is single cell identification information; the single cell identification information provides the user equipment accessing the MBMS dedicated carrier system with the information of the single cell required to access the MBMS dedicated carrier system with uplink feedback.