WO2013075665A1

WO2013075665A1 - Up/downlink data transmission method and wireless access point

Info

Publication number: WO2013075665A1
Application number: PCT/CN2012/085219
Authority: WO
Inventors: 夏金环
Original assignee: 华为技术有限公司
Priority date: 2011-11-24
Filing date: 2012-11-24
Publication date: 2013-05-30
Also published as: CN103139869B; CN103139869A

Abstract

Provided is an up/downlink data transmission method. The method includes: a wireless access point (WAP) accessing an evolved Node B (eNB) via a Uu link, the WAP establishing up/downlink data transmission with the eNB over the Uu link, and the WAP utilizing dedicated frequency domain resources allocated by the eNB over a Ua link to perform up/downlink data transmission with low-cost user equipment (LUE). Correspondingly, also provided is a wireless access point. The up/downlink data transmission method and wireless access point provided by the present invention can be implemented to significantly improve the utilization rate of the network spectrum resources.

Description

Uplink and downlink data transmission method and wireless access point

The present invention relates to the field of communications, and in particular, to an uplink and downlink data transmission method and a wireless access point. Background technique

In LTE (Long Term Evolution), OFDM (Orthogonal Frequency Division Multiplexing) technology is used to improve the spectrum efficiency of mobile radio communication systems. Generally, a user equipment (User Equipment, UE) cannot use the same frequency band at the same time, and both transmits data and receives data, because the device transmits and shares the same antenna, and if the same frequency band is used at the same time, both data is transmitted and data is received. Then, the transmitted data signal may be received back by the antenna, thereby causing self-interference in the UE to cause normal communication. Therefore, the LTE system communicates in the uplink and downlink duplex mode, for example, Frequency Division Duplex (FDD) or Time Division Duplex (TDD).

In the M2M (Machine to Machine) application scenario, the number of user devices is relatively large, and the amount of data transmitted is small and the data is mainly transmitted by the above lines, especially in a large-scale M2M scenario. Lower, direct access to the network will result in lower spectrum utilization and will also affect the spectrum efficiency achievable by normal LTE user equipment. Summary of the invention

An embodiment of the present invention provides an uplink and downlink data transmission method and system, which aggregates transmission data of a low-cost user terminal LUE by adding a wireless access point WAP in the network, and establishes uplink and downlink data communication with the evolved base station eNB, thereby improving spectrum resources. Utilization.

According to a first aspect of the present invention, an uplink and downlink data transmission method is provided, including: a wireless access point WAP accessing an evolved base station eNB through a Uu link;

The WAP establishes uplink and downlink data transmission with the eNB on the Uu link;

The WAP performs uplink and downlink data transmission on the Ua link by using the dedicated frequency domain resource allocated by the eNB and the low-cost user equipment LUE. According to a second aspect of the present invention, a wireless access point is provided, including: an access unit, configured to access an evolved base station eNB through a Uu link;

a first transmission unit, configured to establish uplink and downlink data transmission with the eNB on the Uu link, where the second transmission unit is configured to use the dedicated frequency domain resource allocated by the eNB on the Ua link and the low-cost user equipment LUE Up and down data transmission.

The implementation of the embodiments of the present invention has the following beneficial effects: by adding a wireless access point WAP in the network instead of the low-cost user equipment LUE accessing the eNB, and concentrating the uplink and downlink data of the LUE, the utilization of the network resources is significantly improved; The function is greatly simplified compared with the eNB, and has obvious advantages in equipment cost. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention. For those skilled in the art, other drawings may be obtained according to the drawings without any inventive labor: FIG. 2 illustrates an embodiment according to the present invention. The first schematic diagram of the duplex mode of the Uu link and the Ua link;

3 illustrates a second schematic diagram of a Uu link and Ua link duplexing mode in accordance with an embodiment of the present invention;

4 illustrates a third schematic diagram of a Uu link and Ua link duplexing mode in accordance with an embodiment of the present invention;

Figure 5 illustrates a fourth schematic diagram of a Uu link and Ua link duplexing mode in accordance with an embodiment of the present invention;

FIG. 6 illustrates a schematic structural diagram of a wireless access point according to an embodiment of the present invention. detailed description

The technical solution in the embodiment of the present invention will be clarified in the following with reference to the accompanying drawings in the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. The method includes:

S100, the access point WAP accesses the evolved base station eNB through the Uu link;

S102, the WAP establishes uplink and downlink data transmission with the eNB on the Uu link; S104, the WAP uses the dedicated frequency domain resource allocated by the eNB on the Ua link to perform uplink and downlink data transmission with the low-cost user equipment LUE. .

In the embodiment of the present invention, the system for applying the uplink and downlink data transmission method includes an evolved base station eNB, a wireless access point (WLAN), and a low-cost user equipment (LUE). In the embodiment of the present invention, the WAP accesses the eNB instead of the LUE, and aggregates the uplink and downlink data of the LUE. For the uplink data, the LUE first sends the uplink data to the WAP, and then the WAP packs the uplink data of the multiple LUEs into one MAC PDU (Media Access). The control protocol data unit (media access control protocol data unit) is sent to the eNB by using high-order modulation and coding, and the data of multiple LUEs can occupy the same time-frequency resource. In high-order modulation, the higher the order of modulation, the more information is transmitted per unit time, and accordingly, the higher the data transmission rate. The high-order modulation in the embodiment of the present invention can use 16QAM (Quadrature Amplitude Modulation) and 64QAM. In other embodiments of the invention, a higher modulation order may be selected, such as 128QAM or 256QAM. The high-order coding in the embodiment of the present invention may use the number of bits transmitted in one PRB (Physical Resource Block) in the frequency domain of 56 ms or 72 in the frequency domain of 1 ms (milliseconds). In the embodiment of the present invention, the wireless access point WAP has higher capability and fixed position, and the channel condition is relatively stable, and a relatively high-order modulation and coding mode can be selected to improve the data transmission rate. For the downlink data, the eNB will package the downlink data of multiple LUEs into one MAC PDU and then send it to the WAP, and the data of multiple LUEs occupy the same time-frequency resource, and the WAP decodes the downlink data sent by the eNB, and decodes the decoded data. Each LUE related data is transmitted to each LUE. The WAP is the LUE to aggregate the uplink and downlink data, instead of the LUE accessing the eNB, significantly improving the utilization of network resources. Moreover, WAP coverage is small, generally limited to indoor distance coverage, and the transmission power is small, and eNB Compared with the eNB, the cost can be greatly reduced compared with the eNB, which is very suitable for M2M scenario applications. The LUE may be a device with lower capability than an LTE normal UE, which is typically an M2M device.

LUE supports fewer features than normal UEs, so its cost is lower. Therefore, the LUE structure is usually simpler than a normal UE and consumes less power. The LUE may not have the function of accessing the eNB, but only access the WAP.

The Uu link is a link between the WAP and the eNB through which the UE accesses the WAP. The Ua link is the link between the WAP and the subordinate LUE. The WAP aggregates the data from the LUE through the link and delivers the downlink data to the LUE.

The wireless access point WAP communicates with the eNB according to the Uu air interface protocol. Specifically, the WAP scans the synchronization signal according to the possible location of the frequency band center carrier, obtains downlink synchronization with the eNB, and receives control information. The WAP obtains a dedicated frequency domain resource allocated by the eNB for the Ua link of the WAP and the LUE by using Radio Resource Control (RRC) dedicated signaling between the WAP and the eNB, where the dedicated frequency domain resource includes the bandwidth, the frequency domain location, and the like. . The frequency domain resource of the Ua link is dedicated to the LUE. The eNB does not allocate the part of the frequency domain resource to the normal UE of the LTE. The eNB allocates a dedicated frequency domain resource for the Ua link, which can avoid interference between the two links. . The eNB can also configure the same Ua link dedicated resources for the far-reaching WAPs, so that these frequency domain resources can be multiplexed between Ua links of different WAPs, thereby improving the utilization of spectrum resources. When the WAP and the eNB perform uplink and downlink data transmission, the WAP packages the uplink data of its subordinate LUE into one MAC PDU and sends it to the eNB. After receiving the downlink MAC PDU from the eNB, the WAP parses the MAC PDU, obtains downlink data of the LUE, and transmits the downlink data to the LUE. Packets of multiple LUEs may be packaged in one MAC PDU and uploaded to the eNB or WAP to distribute the parsed data packets to multiple LUEs.

The Uu link between the WAP and the eNB and the Ua link between the WAP and the LUE can use the same uplink and downlink duplex mode, such as FDD or TDD. Considering that the basic uplink service is the main one in the M2M scenario, the existing FDD or TDD ratio is more than the uplink subframe, and the application directly to the M2M scenario will waste resources. The WAP system can be converted into the TDD system through the WAP. The ratio mode in which the TDD downlink subframe is more than the uplink subframe is converted into the ratio mode in which the uplink subframe is more than the downlink subframe, thereby improving the efficiency of the transmission system.

Referring to FIG. 2, a Uu link and a Ua link duplex mode according to an embodiment of the present invention are illustrated. The first schematic diagram, where UL represents the uplink, DL represents the downlink, and the Uu link between the WAP and the eNB uses the FDD, and the WAP uses the first frequency band fl to send the uplink data to the eNB (as shown in FIG. 2 with respect to the WAP). The horizontal axis f is vertically upwardly shown by the arrow), and the WAP receives the downlink data from the eNB using the second frequency band £2 (shown schematically in FIG. 2 with respect to the vertical axis f of the horizontal axis f of the WAP), wherein , fl is not equal to £2. The Ua link between the WAP and the LUE also uses FDD, and the WAP can use the first frequency band fl as the downlink transmission frequency band (as shown schematically in FIG. 2 with respect to the vertical axis f of the LUE). The second band £2 is used as the uplink transmission band (shown schematically in Fig. 2 with respect to the vertical axis f of the horizontal axis f of the LUE). While the WAP uses the frequency band fl to send data to the eNB through the Uu link, the downlink data may also be sent to the LUE through the Ua link using the frequency band fl. Similarly, the data transmitted by the eNB is received by the Uu link in the WAP using the frequency band £2. At the same time, the uplink data transmitted by the LUE can also be received through the Ua link using the frequency band £2. The data for the two links uses different orthogonal subcarriers to ensure minimal interference between the two links.

Referring to FIG. 3, a second schematic diagram of a Uu link and a Ua link duplex mode according to an embodiment of the present invention is illustrated. The Uu link between the WAP and the eNB uses FDD, and the WAP uses the first band in the first frequency band fl. A subframe (such as a subframe corresponding to an arrow that is vertically upward with respect to the horizontal axis f of the WAP) transmits uplink data to the eNB, and receives downlink data from the eNB using the second frequency band f2, where fl is not equal to f2. The Ua link between the WAP and the LUE uses TDD, and uses the first frequency band fl for data transmission. The ratio of the TDD can be determined according to the service characteristics. In the M2M scenario, the ratio of the uplink subframes is selected, for example, TDD configuration 6. According to the method provided by the embodiment of the present invention, the WAP may use the first subframe in the first frequency band fl on the Ua link, while using the first subframe in the first frequency band fl to send uplink data to the eNB. 3, the sub-frame labeled D on the horizontal axis of the LUE, where D represents downlink transmission) sends downlink data to the LUE, and may use the second subframe in the first frequency band fl (as indicated on the horizontal axis of the LUE in FIG. 3) A subframe of U, where U represents an uplink transmission) receives uplink data from the LUE. The second subframe in the embodiment of the present invention is not identical to the first subframe, and the second subframe may be a subframe other than the first subframe. It should be noted that the S subframe is marked as a special subframe (Special Subframe) on the horizontal axis of the LUE, and the S subframe may include three domains: DwPTS (downlink pilot slot), GP (guard interval), and UpPTS ( Uplink pilot time slot). Since the Uu link uses FDD, it does not know the existence of a special subframe, so the downlink of the Uu link is not transmitted on the subframe, but in Ua. The DwPTS of the link transmits downlink data, the UpPTS transmits uplink data, and the GP functions as the uplink and downlink switching time of the LUE.

Referring to FIG. 4, a third schematic diagram of a Uu link and a Ua link duplex mode according to an embodiment of the present invention is illustrated. Uu link between WAP and eNB uses TDD configuration 2, and Ua between WAP and LUE The link also uses TDD, where U indicates uplink transmission and D indicates downlink transmission. The WAP can use the first subframe (such as the subframe with the U on the horizontal axis of the WAP in FIG. 4) to send uplink data to the eNB, using the second. The subframe (such as the subframe in which the horizontal axis of the WAP is marked with D in FIG. 4) receives downlink data from the eNB. Meanwhile, the WAP may use the first subframe (such as the subframe marked with D on the horizontal axis of the LUE in FIG. 4) to transmit downlink data, and use the second subframe (as shown in FIG. 4, the horizontal axis of the LUE is marked with U. The subframe) receives uplink data from the LUE. The TDD of the Ua link can be regarded as a new TDD configuration, and the special subframe can use the corresponding new configuration. Specifically, the UW link is used as the UpPTS of the Ua link in the DwPTS subframe period. Similarly, in the UpPTS subframe period of the Uu link, as the DwPTS time period of the Ua link, the GP is used as the guard time for the uplink and downlink handover.

Referring to FIG. 5, a fourth schematic diagram of a Uu link and a Ua link duplex mode according to an embodiment of the present invention is illustrated. The WAP uses the first frequency band fl to send uplink data to the eNB, and uses the first subframe in the second frequency band. (Subframes indicated by arrows that are vertically downward with respect to the horizontal axis of the WAP in FIG. 5) receive downlink data from the eNB. The Ua link between WAP and LUE uses TDD 6, using the second frequency band £2. According to the method provided by the present invention, the WAP receives the downlink data from the eNB while using the first subframe in the second frequency band £2, The first subframe in the second frequency band £2 (such as the subframe labeled U on the horizontal axis of the LUE in FIG. 5) may be used to receive uplink data from the LUE, and the WAP may use the second in the second frequency band £2. The subframe (such as the subframe marked with D on the horizontal axis of the LUE in FIG. 5) transmits downlink data to the LUE. It should be noted that, since the Uu link uses FDD, it does not know the existence of the special subframe, so the downlink data of the Uu link is not transmitted on the subframe, and the downlink data is transmitted on the DwPTS of the Ua link. The UpPTS transmits uplink data, and the GP functions as the uplink and downlink switching time of the LUE.

In the embodiment shown in FIG. 2 to FIG. 4, the dedicated frequency domain resource of the Ua link can be obtained by using the radio resource control RRC dedicated signaling between the WAP and the eNB, or can also be obtained by using the broadcast information of the eNB. Specifically, broadcast by the eNB, the WAP is on all possible dedicated frequency domain resources. Source to avoid interference. In the foregoing embodiment, when the WAP moves, the two WAPs may be strongly interfered, and the WAP may scan all available Ua link-dedicated frequency domain resources broadcast by the eNB through the Uu link through energy detection, and select one without interference. The dedicated frequency domain resource acts as a new frequency domain dedicated resource for the Ua link.

In the embodiment shown in FIG. 5, the WAP obtains the dedicated frequency domain resource of the Ua link explicitly indicated by the eNB through the dedicated RRC signaling between the WAP and the eNB, so as to better avoid interference, because in this kind In an embodiment, the eNB always sends a downlink control channel on the first N (N<=3) OFDM symbols of the downlink subframe of the Uu link, and the WAP cannot use energy detection to determine whether the dedicated frequency domain resource of the Ua link is used. Other WAPs are occupied. In this embodiment, the WAP may additionally transmit a band lock signal on the Ua link by using the dedicated downlink frequency domain resource, so that the LUE locks the frequency band and accesses the corresponding WAP, wherein the frequency band lock signal may be a fixed length Zadoff- The Chu (ZC) sequence avoids the control domain resources of the Uu link when the resource is mapped. The ZC sequence is different from the synchronization signal used in the existing protocol. This ensures that the LTE normal UE does not access the WAP. In this embodiment, when the WAP moves, the dedicated frequency domain resources of the Ua links of the two WAPs may become mutual interference from the original interference, and when the WAP detects the strong interference of the Ua link, the WAP passes the Uu chain. The uplink signaling of the MAC-CE (Media Access Control - Control Element) indicates the strong interference information of the eNB, that is, the dedicated frequency domain resource indicating the Ua link originally allocated by the eNB through the RCC dedicated signaling. After being in a strong interference state, the eNB then re-allocates the new dedicated frequency domain resource to the WAP through the RRC reconfiguration signaling, and the WAP acquires the new dedicated frequency domain resource that the eNB re-allocates through the RRC reconfiguration signaling.

In the embodiment of the present invention, after the WAP detects the strong interference of the Ua link and obtains the new interference-free dedicated frequency domain resource, the WAP notifies the LUE of the WAP service to perform frequency switching, and switches to the new dedicated frequency domain resource. Specifically, the paging message indicates the new dedicated frequency domain resource of each LUE of the WAP service, that is, sends a paging message to each LUE, where the paging message carries a parameter indicating the location of the new dedicated frequency domain resource, and After a preset time, the new dedicated frequency domain resource location is validated. The preset time may be a system information (SI) modification period or several times of a paging cycle. It should be noted that those skilled in the art can preset according to application requirements. The time is set, and the setting of the time is not limited to the embodiment involved in the embodiment. The new dedicated frequency domain resource may be used by the LUE to acquire synchronization with the WAP and transmit uplink and downlink data with the WAP.

Optionally, the eNB may determine the frequency domain resource of the Ua link between the remote WAPs by using the positioning information, and notify the WAP of the new Ua link by using the RRC reconfiguration signaling when the resources of the Ua link need to be changed. Resource indication; no need for WAP scanning for optional Ua links or reporting interference.

In the embodiment of the present invention, the low-cost user equipment LUE performs frequency band scanning according to all possible locations of the dedicated frequency domain resources of the Ua link, obtains the WAP point accessed by the LUE, and obtains synchronization with the frequency of the WAP point. In the embodiment shown in FIG. 5, if there is a control domain resource sent by the eNB on the Ua link dedicated downlink frequency band, the LUE can use the frequency band lock signal sent by the WAP to access the micro cell formed by the WAP, and obtain and The downlink time-frequency synchronization of the WAP. After the LUE accesses the micro cell formed by the WAP, it receives the broadcast information of the WAP micro cell sent by the WAP. The coverage of the WAP is small, generally less than 100 meters. The uplink synchronization of the LUE and the WAP does not need to use TA (Time Alignment), and does not need to maintain downlink synchronization with the WAP. Only the WAP and the LUE need to maintain downlink synchronization with the eNB. Just fine. The Ua link cancels the RACH (Random Access Channel), and each LUE allocates an SR (Scheduling Request) resource. When the LUE needs to send uplink data and there is no authorized uplink resource, the LUE first sends the SR request resource. After receiving the uplink resource authorized by the WAP, the uplink data is sent by using the authorized uplink resource.

The WAP sends periodic uplink resource scheduling parameters or/and downlink resource scheduling parameters to the LUE, and the periodic uplink resource scheduling parameters include: the uplink resource in the time domain dimension, the frequency domain dimension, and the uplink data transmission format; The periodic uplink resource scheduling parameter is sent to the LUE in a format without detecting the PDCCH, thereby reducing the complexity of the resource scheduling and making the LUE more power-saving. The WAP sends periodic uplink resource scheduling parameters or/and downlink resource scheduling parameters to the LUE through the RRC dedicated signaling of the upper layer; when the periodic uplink resource scheduling parameters or/and the downlink resource scheduling parameters are updated, the RRC reconfiguration signaling is used. Updated periodic uplink resource scheduling parameters or/and downlink resource scheduling parameters to the LUE. In the embodiment of the present invention, after the wireless access point WAP receives the uplink data sent by the LUE and sends the downlink resource scheduling parameter to the LUE, the WAP feeds the joint indication information to the LUE, and the joint indication information includes an uplink retransmission indication and a downlink indication, and the uplink weight is The transmission indication is used to indicate whether uplink data needs to be retransmitted, and the downlink indication is used to indicate whether downlink data needs to be transmitted. Specifically, the uplink retransmission indication is ACK/NACK, and the ACK is Acknowledgement, that is, the indication that no uplink data needs to be retransmitted, and the NACK is Negative Acknowledgement, that is, the uplink data needs to be retransmitted, where one bit is Indicates the ACK/NACK result and the other bit indicates the downlink indication. If no uplink data needs to be retransmitted, the configured uplink resources are scheduled to be used by other UEs in this period. The LUE determines, according to the joint indication information, whether uplink data needs to be retransmitted and whether downlink data needs to be transmitted. If no uplink data needs to be retransmitted and no downlink data needs to be transmitted, the LUE directly shuts down the transceiver and enters a sleep state until the next cycle. If the uplink data needs to be retransmitted, the LUE retransmits the uplink data to the WAP according to the location of the uplink resource in the frequency domain dimension and the transmission format after receiving the joint indication information of the WAP feedback. If there is downlink data to be transmitted, the WAP sends the downlink data to the WAP after feeding back the joint indication information to the LUE. Specifically, if the downlink resource scheduling parameter is sent to the LUE, the downlink resource is sent according to the downlink resource scheduling parameter in the frequency domain dimension and the downlink data transmission format; if the downlink resource scheduling parameter is not sent to the LUE, Then, the PDCCH is used to transmit the location of the downlink resource in the frequency domain dimension and the transmission format of the downlink data, and send the downlink data to the LUE.

FIG. 6 is a schematic structural diagram of a wireless access point according to an embodiment of the present invention. The wireless access point 600 may include:

An access unit 602, configured to access an evolved base station eNB by using a Uu link;

The first transmission unit 604 is configured to establish uplink and downlink data transmission with the eNB on the Uu link, and the second transmission unit 606 is configured to use the dedicated frequency domain resource and the low-cost user equipment allocated by the eNB on the Ua link. The LUE performs uplink and downlink data transmission.

In the embodiment of the present invention, the access unit of the wireless access point WAP communicates with the eNB according to the Uu air interface protocol, and accesses the evolved base station eNB through the Uu link. The WAP in the embodiment of the present invention accesses the eNB instead of the LUE, and aggregates the uplink and downlink data of the LUE. The LUE may be a device with lower capability than a normal UE, which is typically an M2M device. LUE supports fewer features than normal UEs and costs less. So LUE The structure is usually simpler than a normal UE and consumes less power. The LUE may not have the function of accessing the eNB, but only access the WAP.

In the embodiment shown in FIG. 2, both the Ua link and the Uu link use FDD, and the first transmission unit of the wireless access point WAP transmits the uplink data to the eNB using the first frequency band fl, and receives the second frequency band £2. Downlink data from the eNB. In this embodiment, when the first transmission unit sends the uplink data to the eNB by using the first frequency band fl, the second transmission unit may use the first frequency band fl to send downlink data to the LUE; and use the second frequency band in the first transmission unit. While receiving the downlink data from the eNB, the second transmission unit may receive the uplink data from the LUE using the second frequency band f.

In the embodiment shown in Figure 3, the Uu link uses FDD and the Ua link uses TDD 6, using the first frequency band. The first transmission unit transmits uplink data to the eNB using the first subframe of the first frequency band fl, and receives downlink data from the eNB using the second frequency band £2. In this embodiment, while the first transmission unit uses the first subframe of the first frequency band fl to send uplink data to the eNB, the second transmission unit may send the downlink data to the LUE by using the first subframe of the first frequency band fl. The second transmission unit may receive uplink data from the LUE using the second subframe in the first frequency band fl, where the second subframe is different from the first subframe, and may be a subframe other than the first subframe.

In the embodiment shown in FIG. 4, both the Uu link and the Ua link use TDD, and the Uu link uses TDD 2. In this embodiment, the first transmission unit sends uplink data to the eNB by using the first subframe, and receives downlink data from the eNB by using the second subframe, where the second subframe is not equal to the first subframe, and may be the first one. Subframes outside the sub-frame. In this embodiment, when the first transmission unit sends the uplink data to the eNB by using the first subframe, the second transmission unit may send the downlink data to the LUE by using the first subframe; and receive the second subframe by using the first subframe. While the downlink data from the eNB is being received, the second transmission unit may receive the uplink data from the LUE using the second subframe.

Referring to Figure 5, the Uu link uses FDD, the Ua link uses TDD 6, and the second band is £2. The first transmission unit transmits uplink data to the eNB using the first frequency band fl, and receives downlink data from the eNB using the first subframe in the second frequency band £2. In this embodiment, when the first transmission unit receives the downlink data from the eNB by using the first subframe in the second frequency band f2, the second transmission unit may receive the first subframe in the second frequency band £2 from the LUE. Uplink data, and the second transmission unit may send downlink data to the LUE using the second subframe in the second frequency band £2, where the second subframe is not equivalent to the first The subframe may be a subframe other than the first subframe.

The WAP in the embodiment of the present invention may further include a dedicated resource acquiring unit, where the dedicated resource acquiring module obtains the dedicated frequency domain resource through the dedicated radio resource control RRC signaling between the WAP and the eNB, or may also pass the The broadcast information of the eNB acquires a dedicated frequency domain resource, and specifically, performs energy detection on all possible dedicated frequency domain resources broadcast by the eNB. Further, the WAP of the embodiment of the present invention may further include an interference indication unit, which is detected by the WAP. When the dedicated frequency domain resource of the Ua link is in the interference state, the interference indication unit indicates that the eNB's originally allocated dedicated frequency domain resource is in the interfered state by using the medium access control-control unit MAC-CE dedicated signaling. After receiving the indication information of the interference indication unit, the eNB will re-allocate the new dedicated frequency domain resource. The dedicated resource acquiring unit in this embodiment may acquire a new dedicated frequency domain resource that is re-allocated by the eNB through RRC reconfiguration signaling.

The dedicated resource acquiring unit in the embodiment of the present invention, after acquiring the new dedicated frequency domain resource, indicates a new dedicated frequency domain resource to the LUE by using a paging message, and the new dedicated frequency domain resource may be served by the WAP. The LUE is used to obtain synchronization with the WAP and uplink and downlink data transmission with the WAP.

The WAP in the embodiment of the present invention may further include a lock indication unit, where the lock indication unit sends a frequency band lock signal to the LUE of the WAP service, where the frequency band lock signal may be used by the LUE to lock the dedicated frequency domain resource and access the WAP. The band lock signal may be a fixed length Zadoff-Chu (ZC) sequence, and the resource mapping avoids the control domain resource of the Uu link, and the ZC sequence is different from the synchronization signal used in the existing protocol, thereby ensuring the LTE common The UE does not access the WAP.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above disclosure is only a preferred embodiment of the present invention, and of course, the scope of the present invention is not limited thereto, and thus equivalent changes made in accordance with the claims of the present invention are still covered by the present invention. ~ ZT~

TZS80/Z10ZN3/X3d S99S.0/CT0Z OAV

Claims

Rights request

A method for transmitting uplink and downlink data, the method comprising:

The access point WAP accesses the evolved base station eNB through the Uu link;

The WAP performs uplink and downlink data transmission on the Ua link by using the dedicated frequency domain resource allocated by the eNB and the low-cost user equipment LUE.

The method of claim 1, wherein the WAP establishes uplink and downlink data transmission with the eNB on the Uu link, including:

The WAP uses the first frequency band to send uplink data to the eNB, and uses the second frequency band to receive downlink data from the eNB;

The WAP performs uplink and downlink data transmission on the Ua link by using the dedicated frequency domain resource allocated by the eNB and the low-cost user equipment LUE, including:

The WAP transmits downlink data to the LUE by using the first frequency band, and receives uplink data from the LUE by using the second frequency band.

The WAP uses the first subframe in the first frequency band to send uplink data to the eNB, and uses the second frequency segment to receive downlink data from the eNB;

The WAP transmits downlink data to the LUE by using the first subframe in the first frequency band on the Ua link, and receives uplink data from the LUE by using the second subframe in the first frequency band.

The method of claim 1, wherein the establishing, by the WAP, the uplink and downlink data transmissions with the eNB on the Uu link comprises: The WAP sends uplink data to the eNB by using the first subframe, and receives downlink data from the eNB by using the second subframe;

The WAP uses the first subframe to send downlink data to the LUE, and the second subframe uses the second subframe to receive uplink data from the LUE.

The method of claim 1, wherein the establishing, by the WAP, the uplink and downlink data transmissions with the eNB on the Uu link comprises:

The WAP sends uplink data to the eNB by using the first frequency band, and receives downlink data from the eNB by using the first subframe in the second frequency band;

The WAP transmits downlink data to the LUE using the second subframe in the second frequency band, and receives uplink data from the LUE using the first subframe in the second frequency band.

The method according to any one of claims 1 to 5, further comprising: the WAP acquiring the dedicated frequency domain resource by using dedicated radio resource control RRC signaling between the WAP and an eNB, or And acquiring the dedicated frequency domain resource by using broadcast information of the eNB.

The method according to any one of claims 1 to 6, further comprising: the WAP indicating, by the medium access control-control unit MAC-CE dedicated signaling, that the dedicated frequency domain resource is in the eNB Disturbed state

The WAP acquires a new dedicated frequency domain resource that is re-allocated by the eNB by using RRC reconfiguration signaling.

8. The method of claim 7, further comprising:

The WAP indicates a new dedicated frequency domain resource to the LUE by using a paging message, where the new special The frequency domain resource is used by the LUE to obtain synchronization with the WAP and uplink and downlink data transmission with the WAP.

The method according to any one of claims 1 to 8, wherein the method further comprises:

The WAP sends a band lock signal to the LUE, to indicate that the LUE locks the dedicated frequency domain resource and accesses the WAP.

10. A wireless access point WAP, which is characterized by:

An access unit, configured to access an evolved base station eNB through a Uu link;

The WAP of claim 10, wherein the first transmission unit is configured to send uplink data to the eNB by using the first frequency band, and receive downlink data from the eNB by using the second frequency band; And a unit, configured to send downlink data to the LUE by using the first frequency band, and receive uplink data from the LUE by using the second frequency band.

The WAP of claim 10, wherein the first transmission unit is configured to send uplink data to an eNB by using a first subframe in a first frequency band, and receive downlink data from an eNB by using a second frequency band. ;

The second transmission unit is configured to send downlink data to the LUE by using the first subframe in the first frequency band on the Ua link, and receive uplink data from the LUE by using the second subframe in the first frequency band.

The first transmission unit is configured to send uplink data to an eNB using a first subframe, and receive downlink data from an eNB by using a second subframe, where the first transmission unit is configured to: a second transmission unit, configured to send downlink data to the LUE by using the first subframe, and use The second subframe receives uplink data from the LUE.

The WAP according to claim 10, wherein the first transmission unit is configured to send uplink data to the eNB by using the first frequency band, and receive downlink data from the eNB by using the first subframe in the second frequency band. ;

The second transmission unit is configured to send downlink data to the LUE by using a second subframe in the second frequency band, and receive uplink data from the LUE by using the first subframe in the second frequency band.

The WAP according to any one of claims 10 to 14, further comprising: a dedicated resource acquiring unit, configured to perform dedicated radio resource control between the WAP and the eNB

The RRC signaling acquires the dedicated frequency domain resource, or acquires the dedicated frequency domain resource by using broadcast information of the eNB.

The WAP according to any one of claims 11 to 15, further comprising: an interference indication unit, configured to indicate, by the medium access control-control unit MAC-CE dedicated signaling, the dedicated frequency of the eNB The domain resource is in an interfered state;

And a dedicated resource obtaining unit, configured to acquire a new dedicated frequency domain resource that is re-allocated by the eNB by using RRC reconfiguration signaling.

The WAP according to claim 16, wherein the dedicated resource obtaining unit is further configured to: indicate, by using a paging message, a new dedicated frequency domain resource to the LUE, where the new dedicated frequency domain resource is The LUE is used to obtain synchronization with the WAP and uplink and downlink data transmission with the WAP.

The WAP according to any one of claims 10 to 17, further comprising: a lock indication unit, configured to send a band lock signal to the LUE, to instruct the LUE to lock the dedicated frequency The domain resource is connected to the WAP.