CN107682933B - Wireless ad hoc network method and system based on improved TD-LTE special subframe structure - Google Patents
Wireless ad hoc network method and system based on improved TD-LTE special subframe structure Download PDFInfo
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Abstract
The invention discloses a wireless ad hoc network method and a wireless ad hoc network system based on an improved TD-LTE special subframe structure. The technical scheme disclosed by the invention does not change the existing TD-LTE communication mode of the base station and the terminal, and only replaces the connection mode of wire or relay between the original base stations by modifying the special subframe, thereby realizing wireless communication, dynamic networking and multi-hop transmission between the base stations. The scheme of the invention ensures that the terminal side does not need any modification, does not influence the communication between the base station and the terminal, and simultaneously has one-time link establishment and two-way communication, and has more advantages in transmission efficiency compared with the prior preemptive one-way communication of the ad hoc network resources.
Description
Technical Field
The invention relates to a wireless ad hoc network method and a wireless ad hoc network system, and belongs to the technical field of wireless communication.
Background
With the rapid development of wireless communication technology, people have more and more strong demand for mobile communication, and people access a base station through a portable terminal to perform mobile communication. However, at present, the network position between the base stations is fixed, the base stations cannot move randomly, the ductility is poor, the network construction is slow, and the networking robustness is poor. Meanwhile, the support of a matching machine room with a higher protection level, a transmission network and the like is needed, the construction and wiring investment is large, the difficulty is high, the period is long, the requirement on the network specification and the network performance in the later period is high, a professional operation and maintenance team is needed, and the construction and operation cost is high.
When serious disasters such as natural disasters, traffic accidents, terrorist attacks and the like occur, the traditional network can not be used as a reliable communication guarantee obviously. Therefore, a communication network with fast deployment, high reliability and good mobility is needed to guarantee the communication task in the emergency period.
A wireless Ad Hoc Network (Mobile Ad Hoc Network) system does not need fixed equipment, and each node, namely a base station, is automatically networked. The product has the characteristics of wireless communication, dynamic networking, multi-hop transmission and the like. Multimedia information data (video, voice and data) meeting the service quality requirement is transmitted among the base station nodes through dynamic routing and mobile management technology. The network form breaks through the geographical limitation of the traditional network and can be deployed more quickly, conveniently and efficiently.
The existing base station ad hoc network technology needs to add an ad hoc network module on the basis of the original base station, and the transmission distance is limited, so that the matched equipment such as a relay needs to be introduced. Not only is the hardware structure additionally added, but also the communication between the base station and the terminal is affected.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defect that the original ad hoc network needs independent software and hardware design, a more convenient and simpler design scheme is provided on the basis of the original TD-LTE, a hardware structure is not additionally added, and duplex communication can be realized among base station nodes.
The invention adopts the following technical scheme for solving the technical problems:
the invention provides a wireless ad hoc network method based on an improved TD-LTE special subframe structure, wherein in the TD-LTE special subframe structure of a wireless ad hoc network node, an uplink pilot time slot UpPTS is forbidden, the OFDM symbol number of a downlink pilot time slot DwPTS is distributed according to the configuration of an original special subframe, in the rest OFDM symbols, 1 symbol at the head and the tail is configured as a guard interval GP for uplink and downlink conversion, the rest is used as a data symbol, and the bidirectional communication between adjacent base stations is realized by configuring a receiving and transmitting conversion period of the ad hoc network.
As a further detailed solution of the foregoing wireless ad hoc network method of the present invention, the transmit-receive switching periods of the ad hoc network are alternately configured between adjacent base stations to cooperate with data transmission.
As a further detailed solution of the foregoing wireless ad hoc network method of the present invention, in a transceiving conversion period, if the nth special subframe of the base station is configured as a transmission frame, the mth special subframe is a reception frame, and the adjacent base station is configured as the nth special subframe as a reception frame, and the mth special subframe is a transmission frame to cooperate with data transmission; vice versa, N, M are all natural numbers, and N ≠ M.
As a further detailed scheme of the foregoing wireless ad hoc network method of the present invention, in a transceiving conversion period, if j consecutive special subframes of the base station are configured as transmission frames, k consecutive special subframes are reception frames, and an adjacent base station is configured with j consecutive special subframes as reception frames, and k consecutive special subframes are transmission frames to cooperate with data transmission in a corresponding period; and vice versa, j and k are both natural numbers.
As a further detailed scheme of the foregoing wireless ad hoc network method, in the first 3 OFDM symbols of the downlink pilot time slot DwPTS, the first OFDM symbol is configured as a PHICH to ensure normal feedback of the UE, the second OFDM symbol is configured as an inter-base station synchronization signal, the third symbol is configured as a PSS for synchronization of the UE without data transmission, and 1 GP is inserted before and after the second OFDM symbol for transceiving conversion protection; at this time, the GP length should be less than 0.4 OFDM symbols.
Furthermore, the invention also provides a wireless ad hoc network method, the TD-LTE special subframe structure of each node in the wireless ad hoc network adopts the special subframe structure of the invention, wherein, the node at the sending side of the ad hoc network executes the following steps when sending the data packet:
(101) if the IP is under the node of the base station, the IP is directly issued;
(102) if not, judging whether the base station node has a gateway:
if the gateway exists, further judging whether the IP of the adjacent base station exists, and if the IP of the adjacent base station exists, sending the data to the adjacent base station through the ad hoc network channel; if not, directly submitting the gateway; if no gateway exists, the data is directly sent to the adjacent base station through the ad hoc network channel and is processed by the base station node with the gateway;
when receiving the data packet, the ad hoc network receiving side node executes the following steps:
1) the receiving side firstly judges whether the control information is legal or not according to the M-PDCCH, if so, the control information is analyzed, and if not, the control information is discarded;
2) after the M-PDCCH is analyzed, judging whether the data packet is sent to the node of the base station, if so, analyzing the M-PDSCH, and if not, discarding;
3) checking the IP of the data packet after the M-PDSCH is analyzed: if the IP is under the node of the base station, directly forwarding; if not, further judging whether the node of the base station has a gateway: if the gateway exists, directly submitting the gateway; and if no gateway exists, the data is continuously sent to the base station with the gateway through the ad hoc network channel and is processed by the base station node.
As a further scheme of the wireless ad hoc network method, the base station node configuration information specifically includes:
(1) configuring ad hoc network parameter information when a base station cell is established, wherein the configuration ad hoc network parameter information comprises the following steps: ad hoc network type and ID, control symbol number, feedback type;
(2) configuring node information of adjacent base stations, comprising: the ad hoc network type and ID of the adjacent station, the number of control symbols and the feedback type;
(3) establishing a node list of adjacent base stations and transmitting information, comprising: priority, number and type of bearers;
(4) and selecting the adjacent base station nodes to transmit data according to the priority.
Further, in the wireless ad hoc network method, when the number of control symbols is configured, the number of symbols of the M-PDCCH is configured from 1 to the maximum number of symbols of data-1, and the M-PSS and the M-SSS are configured to occupy any 6 RBs or any number of RBs not more than the maximum number of bandwidth RBs of not less than 6 RBs.
The invention also provides a wireless ad hoc network communication system, which comprises an ad hoc network transmitting side system and a receiving side system, wherein the TD-LTE special subframe structure of each node in the wireless ad hoc network adopts the special subframe structure, wherein:
the ad hoc network transmitting side system: the base station node is used for judging whether data needs to be sent to the adjacent base station nodes or not and then selecting to send the data to the corresponding base station nodes according to the priority;
the ad hoc network receiving side system: the data processing system is used for receiving air interface data, judging whether the data is a receiver or not, and analyzing the data to submit to a core network if the data is the receiver; if not, directly discarding.
As a further aspect of the wireless ad hoc network communication system, the ad hoc network transmitting side subsystem performs the following steps when transmitting a data packet:
(101) if the IP is under the node of the base station, the IP is directly issued;
(102) if not, judging whether the base station node has a gateway:
if the gateway exists, further judging whether the IP of the adjacent base station exists, and if the IP of the adjacent base station exists, sending the data to the adjacent base station through the ad hoc network channel; if not, directly submitting the gateway; if no gateway exists, the data is directly sent to the adjacent base station through the ad hoc network channel and is processed by the base station node with the gateway;
the ad hoc network receiving side subsystem executes the following steps when receiving the data packet:
1) the receiving side firstly judges whether the control information is legal or not according to the M-PDCCH, if so, the control information is analyzed, and if not, the control information is discarded;
2) after the M-PDCCH is analyzed, judging whether the data packet is sent to the node of the base station, if so, analyzing the M-PDSCH, and if not, discarding;
3) checking the IP of the data packet after the M-PDSCH is analyzed: if the IP is under the node of the base station, directly forwarding; if not, further judging whether the node of the base station has a gateway: if the gateway exists, directly submitting the gateway; and if no gateway exists, the data is continuously sent to the base station with the gateway through the ad hoc network channel and is processed by the base station node.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. the invention is based on the original TD-LTE subframe structure, only needs to modify the special subframe of the TD-LTE protocol, modifies the original special subframe into a wireless transmission channel between base stations, replaces the connection mode of wired or relay between the original base stations, and realizes wireless communication, dynamic networking and multi-hop transmission between the base stations.
2. The technical scheme disclosed by the invention does not change the communication mode of the original TD-LTE base station and the terminal, the terminal side does not need any modification, the method is simple and easy to implement, the communication between the base station and the terminal is not influenced, and simultaneously, the link is established once and the two-way communication is realized.
3. Duplex communication can be realized among the base station nodes, and compared with the prior one-way communication of preemptive ad hoc network resources, the method has more advantages in transmission efficiency.
Drawings
Fig. 1 is a frame structure of an original special subframe of TD-LTE.
Fig. 2 is a special subframe frame structure improved by the present invention.
Fig. 3 shows the structure of the special subframe of the present invention in both the transmitter and the receiver.
FIG. 4 is a diagram illustrating a physical layer time-frequency resource distribution manner of the special sub-frame according to the present invention.
Fig. 5 is a timing diagram of the transceiving switching of the special subframe according to the first preferred embodiment of the present invention.
Fig. 6 is a timing diagram of transceiving switching of a special subframe according to a second preferred embodiment of the present invention.
Fig. 7 is a special subframe frame structure of a further improvement of the present invention.
Fig. 8 is a flow chart of the ad hoc network sender-side system of the present invention.
Fig. 9 is a flow chart of the ad hoc network receiving side system of the present invention.
Fig. 10 is a TD-LTE special subframe configuration table.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
it will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As shown in fig. 1, the original TD-LTE special subframe consists of a downlink pilot time slot DwPTS, a guard interval GP and an uplink pilot time slot UpPTS, where GP is located between the DwPTS and the UpPTS. Taking special subframe configuration as 5 as an example, wherein a downlink pilot time slot DwPTS is 3 OFDM symbols and is used for transmission of a normal downlink control channel and a downlink shared channel; the uplink pilot time slot UpPTS is 2 OFDM symbols and is used for bearing an uplink physical random access channel and a Sounding pilot signal; the guard interval GP is the remaining 9 OFDM symbols, and is used for the guard interval between uplink and downlink.
As shown in fig. 2, in the TD-LTE special subframe structure of a wireless ad hoc network node, an uplink pilot time slot UpPTS is disabled, the number of DwPTS symbols is allocated according to the original special subframe configuration, in the remaining OFDM symbols, 1 symbol at the beginning and the end is configured as a guard interval GP for uplink and downlink conversion, and the rest are used as data symbols, so as to implement bidirectional communication between adjacent base stations by configuring a transceiving conversion period of an ad hoc network.
Referring to a TD-LTE special subframe configuration table shown in fig. 10, the present invention proposes special subframe configuration 0 or 5, i.e. the first 3 OFDM symbols are DwPTS, the uplink pilot time slot UpPTS is disabled, the downlink pilot time slot DwPTS 3 OFDM symbols are reserved, the remaining 11 symbols reserve 1 symbols at the beginning and the end for GP uplink and downlink conversion, and the rest are used as Data symbols Mesh Data. Reserving a symbol at the beginning and the end as the GP is the time left for uplink and downlink switching of the base station transmitting unit, since both of them are likely to be switched, both symbols are reserved.
As shown in FIG. 3, the base station nodes communicating with each other are configured into two types of Type1 and Type2, respectively. Type1 sends data in special sub-frame, Type2 receives data in special sub-frame; the last 1 symbol GP of Type1 is used for converting downlink to uplink, the 1 st symbol GP of Type2 is used for converting downlink to uplink, and the 2 nd symbol GP of Type2 is used for converting uplink to downlink; and other subframes are used for normal transmission between the base station terminals, and the terminal side does not need to make any modification. Each type of ad hoc network base station node is not always uplink or downlink and can be flexibly switched according to the requirement. Meanwhile, the RE implementation of the ad hoc network physical layer protocol is also various and more flexible and convenient.
Fig. 4 is an ad hoc network transmitting side RE implementation. The specific operation steps are as follows:
(1) configuring ad hoc network parameter information, ad hoc network types and IDs, control symbol numbers and feedback types when a base station cell is established;
(2) configuring node information of adjacent base stations, ad hoc network types and IDs of adjacent stations, control symbol numbers and feedback types;
(3) establishing a list of adjacent base station nodes and transmission information such as priority, bearing number and type and the like;
(4) and the transmitting side selects the adjacent base station nodes to transmit data according to the priority.
As a further preferable scheme of the invention, a transmitting side RE scheme can be optimized, the number of M-PDCCH symbols can be configured to be 1-3, and M-PSS and M-SSS can only occupy the middle 6 RBs, even other more flexible distribution modes. Such as: the number of symbols of the M-PDCCH is configured from 1 to the maximum number of symbols of data-1, and the M-PSS and M-SSS are configured to occupy any 6 RBs or any number of RBs not more than the maximum number of bandwidth RBs of not less than 6 RBs.
As shown in fig. 5, a sequence diagram of the transceiving switching of the special sub-frame according to the first preferred embodiment of the present invention is shown, and by taking the diagram as an example, both types take 5ms as the transceiving switching period, and Type1 and Type2 are performed alternately. The configuration mode is as follows: the first special subframe of the base station is a sending frame, the second special subframe is a receiving frame, the adjacent base station is configured to be the first special subframe as the receiving frame, the second special subframe is the sending frame to cooperate with data transmission, and vice versa. The mode directly realizes two-way communication under the condition of once link establishment, and has transmission advantage compared with the prior ad hoc preemptive one-way communication.
As a further preferable scheme of the present invention, the ad hoc network type transceiver switching period may be flexibly configured, and the configuration mode shown in fig. 6 may also simply and efficiently complete bidirectional transmission. Taking the 5ms period as an example, the configuration is as follows: the first special subframe of the base station is a sending frame, the second special subframe is also a sending frame, the third special subframe is a receiving frame, the fourth special subframe is also a receiving frame, the adjacent base stations are configured to be that the first special subframe is a receiving frame, the second special subframe is also a receiving frame, the third special subframe is a sending frame, the fourth special subframe is also a sending frame to cooperate with data transmission, and vice versa; the simplified description is for transceiving, and the same principle can be configured as any combination of transceiving, transceiving and the like.
As shown in fig. 7, in a scenario of further improving the DwPTS, the present invention proposes to configure the first OFDM symbol to PHICH to ensure normal feedback of the UE in the first 3 OFDM symbols of the DwPTS (the number of symbols configuring the DwPTS according to different special subframes may be more than 3), configure the second OFDM symbol to be an inter-base station synchronization signal, configure the third symbol to be a PSS for synchronization of the UE without data transmission, and insert 1 GP before and after the second OFDM symbol for protection of the transceive conversion. Considering that the normal work of the UE under the original base station is not affected, the specific implementation process is different for the transmitting side and the receiving side:
and reserving a PHICH on a first OFDM symbol at a transmitting side to ensure normal feedback of the UE, reserving a PSS on a third symbol for synchronization of the UE without data transmission, inserting GP before and after the second symbol for transceiving conversion protection, and placing synchronization signals between base stations in the remaining second OFDM symbol, wherein the M-PSS and the M-SSS are configured to occupy any 6 RBs or any RB number which is not more than the maximum bandwidth RB number of not less than 6 RBs. Inserting GP from the fourth OFDM symbol for receiving side to perform transceiving conversion, then sending data, and adding GP for transceiving conversion until the last symbol is finished;
and reserving PHICH at the first OFDM symbol of the receiving side to ensure normal feedback of the UE, reserving PSS at the third symbol for UE synchronization without data transmission, inserting GP before and after the second symbol for receiving and transmitting conversion protection, and starting to receive synchronous signals between base stations at the second OFDM symbol. And inserting GP for transceiving conversion from the fourth OFDM symbol, and then receiving data until GP is added before the end of the last symbol for transceiving conversion protection.
In this scenario, the length of GP is less than 0.4 OFDM symbols, preferably 0.02 ms.
The invention is divided into two systems: the system comprises an ad hoc network transmitting side system and a receiving side system. The composition of each system is as follows:
the ad hoc network transmitting side system: the system mainly judges whether data need to be sent to adjacent base station nodes or not, and then selects and sends the data to the corresponding base station nodes according to the priority.
The ad hoc network receiving side system: the system mainly receives air interface data and judges whether the air interface data is a receiving party. If yes, analyzing the data and submitting the data to a core network; if not, it is directly discarded.
The algorithm principle flow chart of the invention is shown in fig. 8 and fig. 9, wherein fig. 8 is the flow of the ad hoc network transmitting side subsystem:
1) the control plane determines whether data needs to be sent to an adjacent base station through an ad hoc network channel or not according to the IP of the data packet;
2) if the IP under the node of the base station is directly issued;
3) if not, considering whether the node of the base station has a gateway: if the gateway exists, judging whether the gateway is an adjacent base station IP, and if so, sending the data to the adjacent base station through the ad hoc network channel; if not, directly submitting the gateway; if no gateway exists, the data is directly sent to the adjacent base station through the ad hoc network channel and is processed by the base station node with the gateway.
Fig. 9 is a flow of the ad hoc network receiving side subsystem:
1) the receiving side firstly judges whether the control information is legal or not according to the M-PDCCH, if so, the control information is analyzed, and if not, the control information is discarded;
2) after the M-PDCCH is analyzed, whether the data packet is sent to the base station node is judged, if so, the M-PDSCH is analyzed, and if not, the M-PDSCH is discarded;
3) checking the IP of the data packet after the M-PDSCH is analyzed, and directly forwarding the IP if the IP is under the node of the base station;
4) if the IP is not the IP under the node of the base station, whether the node of the base station has a gateway or not is considered. If the gateway exists, directly submitting the gateway; and if no gateway exists, the data is continuously sent to the base station with the gateway through the ad hoc network channel and is processed by the base station node with the gateway.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A wireless ad hoc network method is characterized in that in a TD-LTE special subframe structure of a wireless ad hoc network node, an uplink pilot time slot UpPTS is forbidden, the OFDM symbol number of a downlink pilot time slot DwPTS is distributed according to the configuration of an original special subframe, in the rest OFDM symbols, 1 symbol at the head and the tail is configured as a guard interval GP for uplink and downlink conversion, the rest are used as data symbols, and the bidirectional communication between adjacent base stations is realized by configuring a receiving and transmitting conversion period of an ad hoc network, wherein the node at the transmitting side of the ad hoc network executes the following steps when transmitting a data packet:
(101) if the IP is under the node of the base station, the IP is directly issued;
(102) if not, judging whether the base station node has a gateway:
if the gateway exists, further judging whether the IP of the adjacent base station exists, and if the IP of the adjacent base station exists, sending the data to the adjacent base station through the ad hoc network channel; if not, directly submitting the gateway; if no gateway exists, the data is directly sent to the adjacent base station through the ad hoc network channel and is processed by the base station node with the gateway;
when receiving the data packet, the ad hoc network receiving side node executes the following steps:
1) the receiving side firstly judges whether the control information is legal or not according to the M-PDCCH, if so, the control information is analyzed, and if not, the control information is discarded;
2) after the M-PDCCH is analyzed, judging whether the data packet is sent to the node of the base station, if so, analyzing the M-PDSCH, and if not, discarding;
3) checking the IP of the data packet after the M-PDSCH is analyzed: if the IP is under the node of the base station, directly forwarding; if not, further judging whether the node of the base station has a gateway: if the gateway exists, directly submitting the gateway; and if no gateway exists, the data is continuously sent to the base station with the gateway through the ad hoc network channel and is processed by the base station node.
2. The wireless ad-hoc networking method according to claim 1, wherein: the base station node configuration information is specifically as follows:
(1) configuring ad hoc network parameter information when a base station cell is established, wherein the configuration ad hoc network parameter information comprises the following steps: ad hoc network type and ID, control symbol number, feedback type;
(2) configuring node information of adjacent base stations, comprising: the ad hoc network type and ID of the adjacent station, the number of control symbols and the feedback type;
(3) establishing a node list of adjacent base stations and transmitting information, comprising: priority, number and type of bearers;
(4) and selecting the adjacent base station nodes to transmit data according to the priority.
3. The wireless ad-hoc networking method according to claim 2, wherein: when the number of control symbols is configured, the number of symbols of the M-PDCCH is configured from 1 to the maximum number of symbols of data-1, and the M-PSS and M-SSS are configured as any number of RBs occupying any 6 RBs or no more than the maximum number of bandwidth RBs of no less than 6 RBs.
4. The wireless ad-hoc networking method according to claim 1, wherein: the transceiving switching period of the ad hoc network is alternately configured between adjacent base stations so as to cooperate with data transmission.
5. The wireless ad-hoc networking method according to claim 4, wherein: in a transceiving conversion period, if the Nth special subframe of the base station is configured as a sending frame, the Mth special subframe is a receiving frame, and the adjacent base station is configured as the Nth special subframe as a receiving frame, and the Mth special subframe is a sending frame to cooperate with data transmission; vice versa, N, M are all natural numbers, and N ≠ M.
6. The wireless ad-hoc networking method according to claim 4, wherein: in a transceiving conversion period, if j continuous special subframes of the base station are configured as sending frames, k continuous special subframes are receiving frames, and adjacent base stations are configured as j continuous special subframes as receiving frames in a corresponding period, and k continuous special subframes are sending frames to cooperate with data transmission; and vice versa, j and k are both natural numbers.
7. A wireless ad hoc network communication system is characterized by comprising an ad hoc network transmitting side system and a receiving side system, wherein in a TD-LTE special subframe structure of a wireless ad hoc network node, an uplink pilot time slot UpPTS is forbidden, the OFDM symbol number of a downlink pilot time slot DwPTS is distributed according to the configuration of an original special subframe, in the rest OFDM symbols, 1 symbol at the head and the tail is configured as a guard interval GP for uplink and downlink conversion, the rest are used as data symbols, and bidirectional communication between adjacent base stations is realized by configuring a transceiving conversion period of an ad hoc network, wherein:
the ad hoc network transmitting side system: the base station node is used for judging whether data needs to be sent to the adjacent base station nodes or not and then selecting to send the data to the corresponding base station nodes according to the priority;
the ad hoc network receiving side system: the data processing system is used for receiving air interface data, judging whether the data is a receiver or not, and analyzing the data to submit to a core network if the data is the receiver; if not, directly discarding.
8. A wireless ad hoc network communication system according to claim 7, wherein:
the ad hoc network transmitting side subsystem executes the following steps when transmitting the data packet:
(101) if the IP is under the node of the base station, the IP is directly issued;
(102) if not, judging whether the base station node has a gateway:
if the gateway exists, further judging whether the IP of the adjacent base station exists, and if the IP of the adjacent base station exists, sending the data to the adjacent base station through the ad hoc network channel; if not, directly submitting the gateway; if no gateway exists, the data is directly sent to the adjacent base station through the ad hoc network channel and is processed by the base station node with the gateway;
the ad hoc network receiving side subsystem executes the following steps when receiving the data packet:
1) the receiving side firstly judges whether the control information is legal or not according to the M-PDCCH, if so, the control information is analyzed, and if not, the control information is discarded;
2) after the M-PDCCH is analyzed, judging whether the data packet is sent to the node of the base station, if so, analyzing the M-PDSCH, and if not, discarding;
3) checking the IP of the data packet after the M-PDSCH is analyzed: if the IP is under the node of the base station, directly forwarding; if not, further judging whether the node of the base station has a gateway: if the gateway exists, directly submitting the gateway; and if no gateway exists, the data is continuously sent to the base station with the gateway through the ad hoc network channel and is processed by the base station node.
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| CN1878031A (en) * | 2005-06-09 | 2006-12-13 | 大唐移动通信设备有限公司 | Communication method for time-division duplex mobile communication system |
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