CN102891715B

CN102891715B - A kind of processing method and system of backhaul link subframe

Info

Publication number: CN102891715B
Application number: CN201110208531.6A
Authority: CN
Inventors: 杨瑾; 毕峰; 梁枫; 袁明; 吴栓栓
Original assignee: ZTE Corp
Current assignee: Yancheng Hengyuan Investment Development Co ltd
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2017-12-26
Anticipated expiration: 2031-07-22
Also published as: CN102891715A

Abstract

The invention discloses a kind of processing method and system of backhaul link subframe, can be passed through by network side one or more in the signaling instruction following information of relay station：Backhaul link subframe configuration is supplemented, begins to use the instruction of the supplement backhaul link subframe, stops using the instruction of the supplement backhaul link subframe；Relay station begins to use configured supplement backhaul link subframe to transmit information with network side, or stop using configured supplement backhaul link subframe according to the signaling.The backhaul link subframe treatment technology of the present invention, flexibility and the adaptability of backhaul link resource configuration can be effectively improved, realize backwards compatibility (compatible LTE system) and solve the problems, such as to change backhaul link subframe configuration.

Description

Method and system for processing return link subframe

Technical Field

The present invention relates to the field of communications, and in particular, to a method and a system for processing a backhaul link subframe.

Background

In a network with a Relay (RN) introduced, as shown in fig. 1, a Link between an evolved base station (eNB) and a Macro User Equipment (M-UE) is called a Direct Link (Direct Link), a Link between the eNB and the RN is called a Backhaul Link (Backhaul Link) or a Relay Link (Un interface), a Link between the RN and a Relay domain User Equipment (R-UE) is called an Access Link (Access Link), and a base station serving the Relay on the Backhaul Link is called a home base station (Donor eNB, DeNB) of the Relay.

When in-band relay (inband-relay) is used, that is, the backhaul link and the access link use the same frequency resource, the backhaul link and the access link cannot transmit or receive on the same frequency resource at the same time because the inband-relay transmitter may interfere with its receiver. In a Time Division Duplex (TDD) system, the above problem is solved by dividing and using different uplink/downlink subframes in a Time Division manner between a backhaul link and an access link, that is, a network side indicates uplink/downlink subframes for the backhaul link, that is, a normal backhaul link subframe configuration (Un UL/DL Sub-configuration), for the backhaul link, and an RN performs data transmission with an eNB without providing a traffic data service for an R-UE on the uplink/downlink subframes of the backhaul link.

In an LTE (Long Term Evolution) system, 1 10ms Radio frame (Radio frame) is composed of 10 subframes subframe of 1ms, as shown in fig. 2. The TDD system is configured with 7 different TDD uplink/downlink subframe configurations (TDD UL/DL Config) to meet different network requirements, as shown in table 1, where "D" represents a downlink subframe, "U" represents an uplink subframe, and "S" represents a special subframe. The special subframe is divided into three parts in Time, including a Downlink Time Slot (DwPTS, Downlink Pilot Time Slot), a Guard interval (GP, Guard Period), and an uplink Time Slot (UpPTS, uplink Pilot Time Slot); wherein, DwPTS is used for downlink information transmission, UpPTS is used for uplink information transmission, and GP is a guard time interval between uplink and downlink.

TABLE 1 LTE TDD uplink/downlink subframe configuration

In the TDD system, since the #0, #1, #5, #6 subframes need to carry Broadcast information, synchronization signals, etc., the MBSFN subframe cannot be configured as the MBSFN subframe (Multicast Broadcast Single Frequency Network), that is, the available MBSFN subframe in 1 radio frame is at most 6 subframe subframes, that is, subframes #2, #3, #4, #7, #8, #9 subframes. Currently, a Un downlink subframe available in an LTE-a (Long Term Evolution Advanced, Advanced) system is an MBSFN subframe, and a specific configuration mode of the Un subframe is as follows: the MCE (MBMS control entity) first determines available MBSFN subframes, the network side configures available backhaul downlink subframes (Un DL subframes) in the available mbsfnframes, and selects corresponding backhaul uplink/downlink subframe configurations (Un UL/DL subframe-config) to indicate the RN.

According to the subframe configuration of the LTE TDD system, corresponding Un UL/DL sub-configs under different TDD UL/DL configs are shown in table 2, where the mark "U" in the corresponding subframe position indicates configuration as Un UL subframe, the mark "D" indicates configuration as Un DL subframe, DL: UL ratio represents the configured Un DL/UL subframe ratio. And the network side adopts high-layer signaling to indicate the specific TDD UL/DL Config and Un UL/DL Sub-Config used by the RN.

TABLE 2 TDD backhaul uplink/downlink subframe configuration

Because the Un DL subframe must be a subframe in the MBSFN subframe set, that is, 4 subframes in each radio frame cannot be used as the Un DL subframe, the Backhaul resource is not fully or flexibly utilized in time, and the unavailable Un DL subframe forms a time hole (time hole) in Un transmission.

Disclosure of Invention

In view of this, the present invention mainly aims to provide a method and a system for processing a Backhaul Link subframe, so as to further provide flexible and sufficient resources for Backhaul Link.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a method for processing a backhaul link subframe, the method comprising:

the network side indicates the RN one or more items of the following information through signaling: configuring Extra Un Subframe configuration for a supplementary backhaul link, starting using the indication of the Extra Un Subframe of the supplementary backhaul link, and stopping using the indication of the supplementary backhaul link Subframe;

and the relay station starts to use the configured supplementary backhaul link subframe and the network side to transmit information or stops using the configured supplementary backhaul link subframe according to the signaling.

When the network side carries out the indication through signaling, the signaling is high layer signaling or physical layer signaling.

When the indication is performed through signaling on the network side, the signaling includes an indication of a supplementary backhaul link subframe, where the indication is a supplementary backhaul link subframe configuration index Extra Un subframe configuration tdindex, and the supplementary backhaul link subframe configuration index may determine a configured supplementary backhaul link uplink/downlink subframe.

The configuration of the supplementary backhaul link subframe is preset configuration, and comprises the determined supplementary backhaul link uplink/downlink subframe;

the preset supplementary backhaul link subframe configuration is predefined by a system or indicated to the relay station through a relay station initialization configuration message.

And when the network side indicates the relay station to start using the supplementary backhaul link subframe through signaling, the relay station uses the configured supplementary backhaul link subframe to perform backhaul uplink/downlink transmission with the network side.

When the network side indicates the relay station to start using the supplementary backhaul link subframe through signaling, the signaling includes an effective time for using the supplementary backhaul link subframe, and is used for controlling the relay station to stop using the supplementary backhaul link subframe when the effective time expires.

And when the network side indicates the relay station to stop using the supplementary backhaul link subframe through signaling, the relay station stops using the configured supplementary backhaul link subframe.

And when the network side indicates the relay station to start or stop using the supplementary backhaul link subframe through signaling, the network side indicates to start or stop using the supplementary backhaul link subframe with a binary system state of 1 bit.

When the network side adopts the high-level signaling to indicate the relay station, the high-level signaling is a relay station reconfiguration signaling RNReconfiguration message;

and when the network side indicates the relay station by adopting the physical layer signaling, the physical layer signaling is contained in the downlink control indication of the physical downlink control channel R-PDCCH of the return link.

When the network side indicates the subframe configuration index of the supplementary backhaul link through signaling, the network side indicates the subframe configuration index of the supplementary backhaul link by adopting a bitsmap of X bits or indicates the subframe configuration index of the supplementary backhaul link by a binary state of Ybits; where X is N, Y is ceil (log2(N)), and N is the total number of all available supplemental backhaul link subframe configuration indices in the system.

When the supplementary backhaul link subframe is an in-band subframe, the supplementary backhaul link subframe includes any one or more of downlink subframes #0, #5, #6, and DwPTS in special subframes #1, #6 and corresponding uplink subframes thereof; the structure of the supplementary backhaul link subframe is the same as that of a common backhaul link subframe currently used in the system;

when the supplementary backhaul link subframe is an out-of-band subframe, the supplementary backhaul link subframe includes any one or more downlink subframes and/or DwPTS in special subframes #1, #6 in a radio frame and corresponding uplink subframes thereof; the structure of the supplementary backhaul link subframe is the same as that of an access link subframe currently used in a system, or that of a direct transmission link subframe, or that of a common backhaul link subframe.

The backhaul link uses a Time Division Duplex (TDD) uplink and downlink configuration #0, and when the network side indicates that the relay station uses a supplementary backhaul link subframe configuration #0, the relay station uses a subframe #1 as a supplementary backhaul link special subframe and a subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #0, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #1, the relay station uses subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #0, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #2, the relay station uses subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates the relay station to use the supplementary backhaul link subframe configuration #3, the relay station uses subframe #1 as a supplementary backhaul link special subframe and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates that the relay station uses a supplementary backhaul link subframe configuration #4, the relay station uses subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #5, the relay station uses subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #6, the relay station uses subframe #0 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #7, the relay station uses subframe #5 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses a supplementary backhaul link subframe configuration #8, the relay station uses subframe #1 as a supplementary backhaul link special subframe, and uses subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #9, the relay station uses subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #10, the relay station uses subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #11, the relay station uses subframe #0 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #12, the relay station uses subframe #5 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #13, the relay station uses subframe #1 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #14, the relay station uses subframe #6 as a supplementary backhaul link downlink subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #15, the relay station uses subframes #5 and #6 as supplementary backhaul link downlink subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #3, and the network side instructs the relay station to use subframe configuration #16, where the relay station uses subframes #5, #6, #7 and #8 as the supplementary backhaul link downlink subframes and subframes #2 and #3 as the supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #4, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #17, the relay station uses subframe #1 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #4, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #18, the relay station uses subframes #5 and #6 as supplementary backhaul link downlink subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #4, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #19, the relay station uses subframes #4, #5 and #6 as supplementary backhaul link downlink subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #5, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #20, the relay station uses subframe #8 as a supplementary backhaul link downlink subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #5, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #21, the relay station uses subframes #8 and #9 as supplementary backhaul link downlink subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #6, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #22, the relay station uses subframe #1 as a supplementary backhaul link special subframe, and subframe #8 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #6, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #23, the relay station uses subframe #6 as a supplementary backhaul link special subframe, and subframe #3 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #6, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #24, the relay station uses subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #6, and when the network side instructs the relay station to use the supplementary backhaul link subframe configuration #25, the relay station uses subframe #9 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframes #2, #3, and #4 as a supplementary backhaul link uplink subframe.

The backhaul link uses TDD uplink and downlink configuration #0, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #19, the relay station uses subframe #1 as a supplementary backhaul link special subframe and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #0, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #20, the relay station uses subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #21, the relay station uses subframe #1 as a supplementary backhaul link special subframe and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #22, the relay station uses subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #23, the relay station uses subframe #5 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #24, the relay station uses subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #25, the relay station uses subframe #0 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #26, the relay station uses subframe #5 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #27, the relay station uses subframe #1 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #28, the relay station uses subframes #5 and #6 as supplementary backhaul link downlink subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #4, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #29, the relay station uses subframes #5 and #6 as supplementary backhaul link downlink subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #5, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #30, the relay station uses subframe #8 as a supplementary backhaul link downlink subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #6, and when the network side instructs the relay station to use the supplementary backhaul link subframe configuration #31, the relay station uses subframe #1 as a supplementary backhaul link special subframe, and subframe #8 as a supplementary backhaul link uplink subframe.

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #21, the relay station uses subframe #4 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframes #7 and #8 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #22, the relay station uses subframe #4 as a supplementary backhaul link downlink subframe, subframes #1 and #6 as supplementary backhaul link special subframes, and subframes #7 and #8 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #23, the relay station uses subframes #5 and #9 as supplementary backhaul link downlink subframes, subframe #6 as supplementary backhaul link special subframes, and subframes #2 and #3 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates the relay station uses the supplementary backhaul link subframe configuration #24, the relay station uses subframe #3 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #25, the relay station uses subframes #0 and #3 as supplementary backhaul link downlink subframes, subframe #1 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #2, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #26, the relay station uses subframes #5 and #8 as supplementary backhaul link downlink subframes, subframe #6 as supplementary backhaul link special subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #3, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #27, the relay station uses subframe #8 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #28, the relay station uses subframes #5, #6, and #8 as supplementary backhaul link downlink subframes, and subframes #2, and #3 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #4, and when the network side indicates that the relay station uses the supplementary backhaul link subframe configuration #29, the relay station uses subframes #5, #6, #8 and #9 as supplementary backhaul link downlink subframes, and subframes #2 and #3 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #6, and when the network side instructs the relay station to use the supplementary backhaul link subframe configuration #31, the relay station uses subframe #9 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframes #4 and #8 as supplementary backhaul link uplink subframes.

A processing system of a backhaul link subframe comprises a supplementary backhaul link subframe indication unit and a supplementary backhaul link subframe control unit; wherein,

the supplementary backhaul link subframe indication unit is configured to indicate, through signaling, one or more of the following information of a supplementary backhaul link subframe control unit: a supplementary backhaul link subframe configuration, an indication to start using the supplementary backhaul link subframe, and an indication to stop using the supplementary backhaul link subframe;

and the supplementary backhaul link subframe control unit is used for starting to use the configured supplementary backhaul link subframe and the network side to transmit information or stopping using the configured supplementary backhaul link subframe according to the signaling.

When the indication is performed through signaling, the signaling is high layer signaling or physical layer signaling.

When the indication is performed through signaling, the signaling includes an indication of a supplementary backhaul link subframe, where the indication is a supplementary backhaul link subframe configuration index, and the supplementary backhaul link subframe configuration index is used to determine a configured supplementary backhaul link uplink/downlink subframe.

And when the signaling indicates that the supplementary backhaul link subframe starts to be used, the supplementary backhaul link subframe control unit is used for performing backhaul uplink/downlink transmission with the network side by using the configured supplementary backhaul link subframe.

When the signaling indicates to start using the supplementary backhaul link subframe, the signaling includes an effective time for using the supplementary backhaul link subframe, and is used for controlling the supplementary backhaul link subframe control unit to stop using the supplementary backhaul link subframe when the effective time expires.

The supplementary backhaul link subframe control unit is configured to stop using the configured supplementary backhaul link subframe when the supplementary backhaul link subframe is instructed to stop using by signaling.

And when the signaling indicates to start or stop using the supplementary backhaul link subframe, the supplementary backhaul link subframe indication unit is used for indicating to start or stop using the supplementary backhaul link subframe in a 1-bit binary state.

When the high-level signaling indication is adopted, the high-level signaling is relay station reconfiguration signaling;

and when the physical layer signaling indication is adopted, the physical layer signaling is contained in the downlink control indication of the physical downlink control channel of the backhaul link.

When the signaling indicates the subframe configuration index of the supplementary backhaul link, the subframe indication unit of the supplementary backhaul link is configured to indicate the subframe configuration index of the supplementary backhaul link by using a bitsmap of X bits, or indicate the subframe configuration index of the supplementary backhaul link by using a binary state of Y bits; where X is N, Y is ceil (log2(N)), and N is the total number of all available supplemental backhaul link subframe configuration indices in the system.

The backhaul link uses TDD uplink and downlink configuration #0, and the indication indicates that when the supplementary backhaul link subframe configuration #0 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #0, and the indication indicates that when the supplementary backhaul link subframe configuration #1 is used, the supplementary backhaul link subframe control unit is configured to use subframe #6 as a supplementary backhaul link special subframe and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #0, and the indication indicates that when using the supplementary backhaul link subframe configuration #2, the supplementary backhaul link subframe control unit is configured to use subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when using the supplementary backhaul link subframe configuration #3, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when using the supplementary backhaul link subframe configuration #4, the supplementary backhaul link subframe control unit is configured to use subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when using the supplementary backhaul link subframe configuration #5, the supplementary backhaul link subframe control unit is configured to use subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when the supplementary backhaul link subframe configuration #6 is used, the supplementary backhaul link subframe control unit is configured to use subframe #0 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when using the supplementary backhaul link subframe configuration #7, the supplementary backhaul link subframe control unit is configured to use subframe #5 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when using the supplementary backhaul link subframe configuration #8, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when using the supplementary backhaul link subframe configuration #9, the supplementary backhaul link subframe control unit is configured to use subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #10 is used, the supplementary backhaul link subframe control unit is configured to use subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #11 is used, the supplementary backhaul link subframe control unit is configured to use subframe #0 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #12 is used, the supplementary backhaul link subframe control unit is configured to use subframe #5 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and the indication indicates that when the supplementary backhaul link subframe configuration #13 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and the indication indicates that when the supplementary backhaul link subframe configuration #14 is used, the supplementary backhaul link subframe control unit is configured to use subframe #6 as a supplementary backhaul link downlink subframe and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and the indication indicates that when the supplementary backhaul link subframe configuration #15 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5 and #6 as supplementary backhaul link downlink subframes and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #3, and the indication indicates that when the supplementary backhaul link subframe configuration #16 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5, #6, #7 and #8 as supplementary backhaul link downlink subframes, and subframes #2 and #3 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #4, and the indication indicates that when the supplementary backhaul link subframe configuration #17 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #4, and the indication indicates that when the supplementary backhaul link subframe configuration #18 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5 and #6 as supplementary backhaul link downlink subframes and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #4, and the indication indicates that when the supplementary backhaul link subframe configuration #19 is used, the supplementary backhaul link subframe control unit is configured to use subframes #4, #5 and #6 as supplementary backhaul link downlink subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #5, and the indication indicates that when the supplementary backhaul link subframe configuration #20 is used, the supplementary backhaul link subframe control unit is configured to use subframe #8 as a supplementary backhaul link downlink subframe and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #5, and the indication indicates that when the supplementary backhaul link subframe configuration #21 is used, the supplementary backhaul link subframe control unit is configured to use subframes #8 and #9 as supplementary backhaul link downlink subframes and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #6, and the indication indicates that when the supplementary backhaul link subframe configuration #22 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #8 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #6, and the indication indicates that when the supplementary backhaul link subframe configuration #23 is used, the supplementary backhaul link subframe control unit is configured to use subframe #6 as a supplementary backhaul link special subframe and subframe #3 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #6, and the indication indicates that when the supplementary backhaul link subframe configuration #24 is used, the supplementary backhaul link subframe control unit is configured to use subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #6, and the indication indicates that when the supplementary backhaul link subframe configuration #25 is used, the supplementary backhaul link subframe control unit is configured to use subframe #9 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframes #2, #3, and #4 as a supplementary backhaul link uplink subframe.

The backhaul link uses TDD uplink and downlink configuration #0, and the indication indicates that when the supplementary backhaul link subframe configuration #19 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #0, and the indication indicates that when using the supplementary backhaul link subframe configuration #20, the supplementary backhaul link subframe control unit is configured to use subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when the supplementary backhaul link subframe configuration #21 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when the supplementary backhaul link subframe configuration #22 is used, the supplementary backhaul link subframe control unit is configured to use subframes #1 and #6 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when the supplementary backhaul link subframe configuration #23 is used, the supplementary backhaul link subframe control unit is configured to use subframe #5 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #24 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #25 is used, the supplementary backhaul link subframe control unit is configured to use subframe #0 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #26 is used, the supplementary backhaul link subframe control unit is configured to use subframe #5 as a supplementary backhaul link downlink subframe, subframe #6 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and the indication indicates that when the supplementary backhaul link subframe configuration #27 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and the indication indicates that when the supplementary backhaul link subframe configuration #28 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5 and #6 as supplementary backhaul link downlink subframes and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #4, and the indication indicates that when the supplementary backhaul link subframe configuration #29 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5 and #6 as supplementary backhaul link downlink subframes and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #5, and the indication indicates that when using the supplementary backhaul link subframe configuration #30, the supplementary backhaul link subframe control unit is configured to use subframe #8 as a supplementary backhaul link downlink subframe and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #6, and the indication indicates that when the supplementary backhaul link subframe configuration #31 is used, the supplementary backhaul link subframe control unit is configured to use subframe #1 as a supplementary backhaul link special subframe and subframe #8 as a supplementary backhaul link uplink subframe.

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when the supplementary backhaul link subframe configuration #21 is used, the supplementary backhaul link subframe control unit is configured to use subframe #4 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframes #7 and #8 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when the supplementary backhaul link subframe configuration #22 is used, the supplementary backhaul link subframe control unit is configured to use subframe #4 as a supplementary backhaul link downlink subframe, subframes #1 and #6 as supplementary backhaul link special subframes, and subframes #7 and #8 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #1, and the indication indicates that when the supplementary backhaul link subframe configuration #23 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5 and #9 as supplementary backhaul link downlink subframes, subframe #6 as supplementary backhaul link special subframes, and subframes #2 and #3 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #24 is used, the supplementary backhaul link subframe control unit is configured to use subframe #3 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #7 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #25 is used, the supplementary backhaul link subframe control unit is configured to use subframes #0 and #3 as supplementary backhaul link downlink subframes, subframe #1 as supplementary backhaul link special subframes, and subframe #7 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #2, and the indication indicates that when the supplementary backhaul link subframe configuration #26 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5 and #8 as supplementary backhaul link downlink subframes, subframe #6 as supplementary backhaul link special subframes, and subframe #2 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #3, and the indication indicates that when the supplementary backhaul link subframe configuration #27 is used, the supplementary backhaul link subframe control unit is configured to use subframe #8 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframe #2 as a supplementary backhaul link uplink subframe;

the backhaul link uses TDD uplink and downlink configuration #3, and the indication indicates that when the supplementary backhaul link subframe configuration #28 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5, #6 and #8 as supplementary backhaul link downlink subframes, and subframes #2 and #3 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #4, and the indication indicates that when the supplementary backhaul link subframe configuration #29 is used, the supplementary backhaul link subframe control unit is configured to use subframes #5, #6, #8 and #9 as supplementary backhaul link downlink subframes, and subframes #2 and #3 as supplementary backhaul link uplink subframes;

the backhaul link uses TDD uplink and downlink configuration #6, and the indication indicates that when the supplementary backhaul link subframe configuration #31 is used, the supplementary backhaul link subframe control unit is configured to use subframe #9 as a supplementary backhaul link downlink subframe, subframe #1 as a supplementary backhaul link special subframe, and subframes #4 and #8 as supplementary backhaul link uplink subframes.

The supplementary backhaul link subframe indication unit is arranged at a network side, and the supplementary backhaul link subframe control unit is arranged in the relay station.

The network side includes one or more of the following entities: the system comprises a base station, a relay node, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN and an operation, administration and maintenance OAM manager.

The return link subframe processing technology can effectively improve the flexibility and the adaptability of the return link resource configuration, realize backward compatibility (compatibility with an LTE system) and solve the problem of changing the return link subframe configuration.

Drawings

Fig. 1 is a schematic diagram of a network structure incorporating a relay station;

FIG. 2 is a diagram of a system frame structure;

fig. 3 is a schematic diagram of backhaul link subframe processing according to a first embodiment of the present invention;

fig. 4 is a schematic diagram of backhaul link subframe processing according to a second embodiment of the present invention;

fig. 5 is a schematic diagram of backhaul link subframe processing according to a third embodiment of the present invention;

fig. 6 is a schematic diagram of backhaul link subframe processing according to a fourth embodiment of the present invention;

fig. 7 is a simplified process flow diagram of a backhaul link subframe according to an embodiment of the present invention;

fig. 8 is a diagram of a backhaul link subframe processing system according to an embodiment of the present invention.

Detailed Description

In practical applications, in order to improve flexibility and adaptability of backhaul link resource configuration, implement backward compatibility (compatible with LTE system), and solve the problem of changing backhaul link subframe configuration, the network side may indicate one or more of the following information to the relay station through signaling: a supplementary backhaul link subframe configuration, an indication to start using the supplementary backhaul link subframe, and an indication to stop using the supplementary backhaul link subframe; the relay station can start to use the configured supplementary backhaul link subframe and the network side to transmit information or stop using the configured supplementary backhaul link subframe according to the corresponding indication. The network side can perform the signaling indication on the relay station through high-layer signaling or physical layer signaling.

The supplementary backhaul link subframe is indicated by a network side through signaling or is a fixed configuration preset by a system.

And when the network side indicates the relay station to start using the supplementary backhaul link subframe through signaling, the relay station uses the configured supplementary backhaul link subframe to perform backhaul uplink/downlink transmission with the network side. And when the network side indicates the relay station to stop using the supplementary backhaul link subframe through signaling, the relay station stops using the configured supplementary backhaul link subframe. And when the network side indicates the relay station to start or stop using the supplementary backhaul link subframe through signaling, the network side indicates to start or stop using the supplementary backhaul link subframe with a binary system state of 1 bit.

It should be noted that, when the network side indicates the relay station to start using or stop using the supplementary backhaul link subframe through signaling, the signaling configuration includes an indication of the supplementary backhaul link subframe, and the network side indicates the supplementary backhaul link uplink/downlink subframe configured by the relay station through a supplementary backhaul link subframe configuration index (Extra Un subframe configuration tdd index).

When the supplementary backhaul link subframe is preset fixed configuration, the supplementary backhaul link subframe includes a determined supplementary backhaul link uplink/downlink subframe, and is predefined by a system or indicated to a relay station through a relay station initialization configuration message.

Specifically, when the supplementary backhaul link subframe is an in-band subframe, the supplementary backhaul link subframe includes any one or more of downlink subframes #0, #5, #6, and a special subframe DwPTS and a corresponding uplink subframe thereof; the structure of the supplementary backhaul link subframe is the same as that of a common backhaul link subframe currently used in the system. The common backhaul link subframe is a backhaul link uplink/downlink subframe corresponding to a backhaul link subframe configuration index indicated by the relay station by a system through a configuration parameter TDD subframe configuration pattern (subframe configpattern TDD).

When the supplementary backhaul link subframe is an out-of-band subframe, the supplementary backhaul link subframe comprises DwPTS in any one or more downlink subframes and/or special subframes in a wireless frame and corresponding uplink subframes thereof; the structure of the supplementary backhaul link subframe is the same as that of an access link subframe currently used in a system, or that of a direct transmission link subframe, or that of a common backhaul link subframe.

When a network side indicates a relay station by adopting a high-level signaling, the high-level signaling is a relay station reconfiguration signaling (RNReconfiguration message); when the network side indicates the relay station by adopting physical layer signaling, the physical layer signaling is contained in Downlink Control Indication (DCI) of a physical downlink control channel (R-PDCCH) of a backhaul link.

When the supplementary backhaul link subframe is indicated by a network side, indicating that the signaling of the supplementary backhaul link subframe comprises effective time for using the supplementary backhaul link subframe; and the relay station starts to use the corresponding supplementary backhaul link subframe to carry out uplink/downlink transmission on the backhaul link according to the indication, and stops using the supplementary backhaul link subframe when the configured effective time is up.

When the network side indicates the supplementary backhaul link subframe configured by the relay station through a high-layer signaling or a physical layer signaling, the network side may indicate the supplementary backhaul link subframe by using a bitmap (bitmap) of X bits or indicate the supplementary backhaul link subframe by using a binary state of Y bits; where X is N, Y is ceil (log2(N)), and N is the total number of all available supplemental backhaul link subframe configuration indices in the system. Specifically, the network side can represent the relay station to start and stop using the supplementary backhaul link subframe in a binary state of 1bit in the higher layer signaling or the physical layer signaling.

In practical applications, the network side, which is one of the execution subjects, may include one or more of the following entities: a base station (e.g., eNB), a relay node (e.g., RN), a cell coordination Entity (MCE), a Gateway (GW), a Mobility management device (MME), an Evolved Universal Terrestrial Radio Access Network (EUTRAN), and an Operation Administration and Maintenance (OAM) manager. The following description will be made by taking an eNB as an example.

And the eNB configures corresponding backhaul link subframes (including backhaul uplink/downlink subframes) for the relay station according to the resource requirements of the backhaul link, and the backhaul link subframes are used for uplink/downlink data transmission of the backhaul link. Due to variations in the amount of backhaul link data, normal backhaul link subframes that may be used in LTE-a systems may not be able to meet Un data requirements, so the eNB instructs the RN to further use supplemental backhaul link subframes (Extra Un subframes) for Un data transmission. When the Un data demand decreases, the eNB may instruct the RN to stop using the Extra Un Subframe, releasing the resources. The Extra Un Subframe used by the RN can be configured by the eNB according to the Un data requirement and indicated to the RN; the ue may also be preset by the system, that is, a fixed configuration predefined for the system, or indicated by the eNB to the RN at the time of RN initialization, so as to indicate preset supplementary backhaul uplink/downlink subframes.

For the case where the Extra Un Subframe is preset by the system, the eNB only needs to instruct the RN to start using the Extra Un Subframe, i.e. the RN starts using the preset Extra Un Subframe for backhaul link data transmission.

For the Extra Un Subframe indicated by the eNB signaling configuration, the indication signaling indicating that the RN starts to use the Extra Un Subframe may be indicated to the RN together in the eNB signaling, and in the indication signaling, the eNB indicates the supplemental backhaul uplink/downlink Subframe configured by the relay station through the Extra Un Subframe configuration tdd index. The system defines an Extra Un Subframe configuration table, each Extra Un Subframe configuration corresponds to an Index, and the eNB only needs to indicate the Index to the RN, i.e. indicates that the RN uses the corresponding Extra Un Subframe. An example of an Extra UnSubframe configuration table is shown in table 3, where subframes marked D indicate configuration as Un DL subframes, subframes marked U indicate configuration as Un UL subframes, and subframes marked S indicate configuration as Un special subframes. When the special subframes #1, #6 are configured as Un special subframes, it indicates that DwPTS portion therein is used for backhaul downlink transmission and/or UpPTS portion is used for backhaul uplink transmission.

TABLE 3

According to the example shown in table 3, the configuration of the supplementary backhaul link subframes is periodic by 10ms, that is, the supplementary backhaul link subframes that can be used by the RN are consistent every 10ms radio frame level and are reused in the period of 10 ms. In addition, the supplementary backhaul link subframe may also be configured with other periods, such as 40ms, 80ms, or 160ms, etc., and table 4 gives an example of a 40ms period.

For the Extra Un Subframe indicated by eNB, other configurations may also be continuously added in the Un Subframe configuration table already existing in the system shown in table 2, as a supplementary backhaul link Subframe configuration, as shown in table 5. The eNB configures and indicates subframe configuration TDD through a relay station subframe configuration information element (RN-subframe configuration element) in a high-layer signaling RNReconfiguration message, and indicates the configured supplementary backhaul link subframe to the RN. For the original backhaul link subframe configuration (as shown in table 2), the valid indication range of subframe configuration tdd is [0, 18], and the value range of subframe configuration tdd is [0, 31], then taking table 5 as an example, the eNB may add the supplemental backhaul link subframes in table 2, and indicate the supplemental backhaul link subframe configuration using the subframe configuration tdd corresponding indication values (i.e. any one or more indication values in [19-31 ]) that are not used by the original backhaul link subframe. At this time, the original backhaul link subframe and the supplementary backhaul link subframe configured by the eNB to the RN are simultaneously valid, that is, the RN simultaneously uses the original backhaul link subframe and the supplementary backhaul link subframe to communicate with the eNB according to the instruction of the eNB.

TABLE 5

With respect to table 5, the original backhaul link subframe and the supplementary backhaul link subframe respectively correspond to different subframe configuration tdd indication values, and the RN may have the original backhaul link subframe and the supplementary backhaul link subframe configuration at the same time according to the indication of the eNB, and use the corresponding subframes. As shown in table 6, the indication of the supplementary backhaul link subframe may be superimposed on the original backhaul link subframe configuration to indicate to the RN. In the Un subframe configuration table of the system shown in table 2, other configurations are continuously added to serve as supplementary backhaul link subframe configurations, and the eNB indicates a subframe configuration tdd through an RN-subframe configuration information element in a higher layer signaling RNReconfiguration message, and indicates the configured backhaul link subframe to the RN.

Taking table 6 as an example, the eNB uses the unused subframe configuration tdd corresponding indication value (i.e. any one or more of the indication values [19-31 ]) of the original backhaul link subframe to indicate the configuration of the supplementary backhaul link subframe, at this time, the original backhaul link subframe configured by the eNB to the RN is invalid, the RN stops using the original backhaul link subframe, and only uses the configuration of the supplementary backhaul link subframe to communicate with the eNB according to the indication of the eNB.

TABLE 6

According to the frequency domain resource of the Extra Un Subframe, the Extra Un Subframe can be further divided into two categories: in-band/out-of-band supplemental backhaul subframes (inband/outband Extra Un subframes). The inband refers to: the eNB and the RN use the same frequency band resource as the Access Link in the transmission of the backhaul Link; inband Extra Un Subframe refers to: and performing backhaul Link transmission on the configured Extra Un Subframe by using the same frequency band resource as the Access Link. outband means: the eNB and the RN use frequency band resources different from the Access Link in the transmission of the backhaul Link; outband Extra Un Subframe refers to: and performing backhaul Link transmission on the configured Extra Un Subframe by using a frequency band resource different from the Access Link. The Extra Un Subframe used by the RN is inband or outband Extra Un Subframe, indicated by the network side for the RN, or implicitly by the specifically configured/predefined Extra Un Subframe.

For any one or more of inband Extra Un Subframe, downlink subframes #0, #5, #6, and DwPTS of special subframes #1, #6 may be configured as DL Extra Un Subframe; for outband Extra Un Subframe, any one or more downlink subframes in a radio frame may be configured as DL Extra Un Subframe. Under each Extra Un Subframe configuration, the timing relationship between the downlink Subframe and the corresponding uplink Subframe may be determined according to the timing relationship between the uplink resource grant indication and the uplink transmission, or the timing relationship between the downlink transmission and the uplink feedback, or the Un uplink/downlink subframes included in each Extra Un Subframe configuration may be defined in the Extra Un Subframe configuration table.

Under Un UL/DL Sub-config, uplink/downlink subframes for backhaul link transmission between RN and eNB are as shown in table 2. Since RN needs to maintain the transmission of control information to Access Link on the normal backhaul Link downlink subframe, a certain backhaul Link subframe structure needs to be observed on the normal backhaul Link downlink subframe, for example, control information is transmitted to Access Link on the first two Orthogonal Frequency Division Multiplexing (OFDM) symbols of the backhaul Link downlink subframe, and after RN transmit/receive state conversion, eNB signals start to be received from the third OFDM symbol. When the RN configures to use the inbound Extra Un Subframe, the RN must maintain the same backhaul Link Subframe structure as the currently used normal backhaul Link on the configured supplemental backhaul Link downlink Subframe (Extra Un DL Subframe) to maintain the service to the Access Link. When the RN is configured to use outband Extra Un Subframe, because a different frequency band resource is used than the Access link, the RN may adopt the same Subframe structure on the configured Extra Un DL Subframe as the structure of the Access link Subframe currently used in the system, or the structure of the direct transmission link Subframe, or the structure of the normal backhaul link Subframe.

When the eNB instructs the RN to start/stop using the Extra Un Subframe, the RN may be indicated by high layer signaling or physical layer signaling, and may be notified by two signaling indications (indication signaling for starting and stopping use, respectively), or may be indicated by one signaling, and the RN may be controlled to start/stop using the Extra Un Subframe by indicating the valid use time of the configured Extra Un Subframe, that is, an indication of the valid use time of the Extra Un Subframe is included in this signaling. During the indicated time period, the RN may use the Extra Un Subframe; when the configured valid time arrives, the RN stops using the Extra Un Subframe. And the RN starts/stops using the corresponding Extra UnSubframe according to the instruction of the eNB and performs backhaul link data transmission with the eNB on the corresponding Extra Un DL/UL subframe.

When the system predefined fixed Subframe configuration is as the Extra Un Subframe, the eNB only needs to instruct the RN to start/stop using the Extra Un Subframe. Further, when the eNB indicates the RN to start using and stop using the Extra Un Subframe through two signaling, the indication signaling correspondingly indicates the RN to start using and stop using the supplementary backhaul link Subframe in a binary state of 1bit in the high layer signaling or the physical layer signaling.

When the eNB indicates the Extra Un Subframe according to the backhaul link configuration, the Extra Un Subframe specifically configured to the RN is indicated to the RN by the eNB through high layer signaling or physical layer signaling, and the configured Extra Un Subframe comprises Un DL and/or UL subframes. Further, the eNB adopts the bitmasp information of X bits to indicate the Extra Un Subframe, or adopts the binary state information of Y bits to indicate the Extra Un Subframe; where X is N, Y is ceil (log2(N)), ceil denotes an rounding-up operation, log2 denotes a base-2 logarithmic operation, and N is the total number of all available supplemental backhaul link subframe configuration indices in the system. The eNB instructs the RN to start/stop using the Extra Un Subframe, wherein the signaling simultaneously carries the specific configuration information for the Extra Un Subframe, or the signaling for starting/stopping using the Extra Un Subframe and the configuration information signaling for the specific Extra Un Subframe are respectively indicated to the RN in different signaling messages, or the indication signaling for stopping using the Extra Un Subframe does not include the configuration information indication for the specific Extra Un Subframe.

And the eNB adopts high-layer signaling to instruct the RN to start/stop using the Extra Un Subframe and/or the specific configuration information indication of the Extra Unsubframe, and adopts RNReconfiguration message to indicate to the RN. Further, the specific configuration information indication for the Extra Un Subframe, that is, the Extra Un Subframe configuration tdd index information, is included in the relay station Subframe configuration information element RN-Subframe configuration information element.

And the eNB adopts physical layer signaling to instruct the RN to start/stop using the Extra Un Subframe and/or specific configuration information indication of the Extra Un Subframe, and adopts R-PDCCH to instruct the RN. Wherein the indication information is included in DCI.

The technical solution of the present invention is further explained with reference to the drawings and the specific embodiments.

Example one

In the process of RN initializing access network, eNB indicates predefined Extra Un Subframe for RN, and indicates Extra Un Subframe configuration TDDindex to RN through high-layer signaling RNReconfiguration message. The current macro cell uses TDD UL/DL Config 2, and the eNB instructs RN Un subframe configuration tddindex to be 8, according to table 3, that is, subframe #1 is configured to be a supplemental backhaul link special subframe Extra Un S subframe, where DwPTS portion of #1 is used for Un downlink transmission and subframe #7 is a supplemental backhaul link uplink subframe (Extra Un UL subframe).

And when the data volume of the backhaul link is increased and the common backhaul link Subframe configured for the RN cannot meet the data requirement, the eNB indicates the RN to start using the Extra Un Subframe through physical layer signaling. The eNB indicates to the RN to start using the Extra Un Subframe by a 1bit indicator bit in the DCI in the R-PDCCH. In response to the instruction, the RN receives downlink transmission from the eNB in subframe #1 and performs uplink transmission to the eNB in subframe # 7. When the data volume of the backhaul link is reduced, the eNB instructs the RN to stop using the Extra Un Subframe, and the RN is instructed to stop using the Extra Unsubframe in the R-PDCCH through a 1bit indicator bit in DCI. Wherein the 0/1 state of the 1bit indicator bit in the DCI corresponds to start/stop or stop/start using the Extra Un Subframe, respectively.

Example two

The macro cell uses TDD UL/DL Config 3, and the system presets an Extra Un Subframe as Subframe #6 as an Extra Un DL Subframe, and Subframe #2 as an Extra Un UL Subframe.

When the data volume of the return link is increased and the common return link Subframe configured to the RN cannot meet the data requirement, the eNB indicates the RN to start using the Extra Un Subframe through a high-level signaling; the higher layer signaling also indicates the effective time for the RN to use the predefined Extra Un Subframe. The eNB indicates to the RN to start using the Extra Un Subframe by RNReconfiguration message, and indicates the effective time to be 500 ms. And the RN receives downlink transmission of the eNB on a subframe #6 and carries out uplink transmission to the eNB on a subframe #2 according to the instruction by using the preset Extra Unscubframe. When the time for using the Extra Un subframe reaches 500ms, the RN stops using the Extra Un subframe.

Example three

And the eNB instructs the RN to use the Extra Un subframe according to the backhaul link requirement by real-time scheduling configuration. When the data volume of the backhaul link is increased, the eNB indicates to the RN to start using the Extra Un subframe through a high layer signaling RNReconfiguration message, and indicates the specifically configured Extra Un subframe configuration tdd index. The current macro cell uses TDD UL/DL configuration 4, the eNB indicates an ubframe configuration TDD index configured by RN in an RN reconfiguration message by using a relay station supplemental backhaul link subframe configuration information element (RN-Extra-subframe configuration information element), and further indicates the configured ubframe configuration TDD index by Y bits (18), where Y is ceil (log2(N)), N is the total number of all available supplemental backhaul link subframe configuration indexes in the system, taking the table as example 3, N is 26, and Y is 5. According to table 3, the subframes #5 and #6 are configured as Extra Un DL subframe, and the subframe #2 is configured as Extra Un UL subframe. The RN receives downlink transmission from the eNB in subframes #5 and #6 and performs uplink transmission to the eNB in subframe #2 in response to the instruction.

Since the configured Extra Un subframe is an inbound subframe, that is, the RN uses the same frequency band resource as the Access Link to transmit between the Extra Un subframe and the eNB, the RN needs to use the same structure as the current ordinary backhaul Link subframe. The eNB configures the normal backhaul link subframe of RN as subframe configuration tdd Index 15, as shown in table 2, that is, subframes #8 and #9 are Un DL subframes, and subframe #3 is Un UL subframe. On the current downlink subframe of the common backhaul Link, the RN transmits control information to the Access Link on the first two OFDM symbols of the subframe, and after the transmission/reception state is switched, starts to receive the signal of the eNB from the third OFDM symbol. The RN performs control information transmission to the Access Link using the first two OFDM symbols on the Extra Un DL subframe #5 and #6, and starts receiving the eNB signal from the third OFDM symbol after the transmission/reception state transition. On the current normal backhaul link uplink subframe, the RN transmits only the first 13 SC-FDMA symbols of the subframe, and the remaining time in the subframe is used as the transmission/reception and transmission/reception conversion time, so the RN also transmits only the first 13 SC-FDMA symbols of the subframe on the Extra Un ul subframe # 2.

When the data requirement of the backhaul link is reduced, the eNB instructs the RN to stop using the Extra Un Subframe through a high-layer signaling RNReconfiguration message, and the RN releases resources according to the instruction of stopping using the configured Extra Un Subframe.

Example four

And the eNB instructs the RN to use the Extra Un subframe according to the backhaul link requirement by real-time scheduling configuration. When the data amount of the backhaul link is increased, the eNB indicates to the RN to start using the Extra Unsubframe and the effective use time of 200ms through high-layer signaling RNReconfiguration message, and indicates to the RN the configured Extra Unsubframe through DCI in physical layer signaling R-PDCCH.

The current macro cell uses TDD UL/DL configuration 1, and the eNB configures the normal backhaul link subframe of RN as subframe configuration TDD Index ═ 3, as shown in table 2, that is, subframes #4 and #9 are Un DL subframes, and subframe #3 is an Un UL subframe. For TDD UL/DL Config 1, taking table 3 as an example, there are 5 available Extra Un subframes, and in DCI, eNB indicates the configured Extra Un subframer to RN through bitmap of X bit, where X is 5. The eNB indicates the configured Extra Un subframe in DCI, denoted "10000", which means that the RN is configured to use the first Extra Un subframe configuration available in TDD UL/DL Config 1, which is the Extra Un subframe configuration TDD index ═ 3. In response to the instruction, the RN receives downlink transmission from the eNB in subframe #1 and performs uplink transmission to the eNB in subframe # 7. When the time for using the Extra Un subframe reaches 200ms, the RN stops using the Extra Un subframe.

Since the configured Extra Un subframe is outband subframe, i.e. the RN uses a different frequency band resource from the Access Link to transmit between the Extra Un subframe and the eNB, the RN uses the same subframe structure as the currently used Access Link subframe in the system on the configured Extra Un DLsubframe. The RN maintains a complete subframe structure at the Extra Un dl subframe #1, and receives the eNB's signal over 14 OFDM symbols. The RN maintains a complete subframe structure at the Extra Un ULsubframe #7 and transmits an uplink signal to the eNB at 14 SC-FDMA symbols.

Example five

When the eNB indicates the Extra Un subframe to the RN through the high layer signaling, specifically, the eNB indicates the RN through the RN-Extra-subframe configuration information element. Preferably, the configured Extra Un subframe configuration TDD index is indicated with subframe configuration Pattern TDD.

Preferably, the RN-Extra-subframe configuration information element may be carried in the RNReconfiguration message, or may be issued to the RN independently as a message or an Information Element (IE). The issued higher layer protocol source language is as follows:

example six

Adding 1bit in the RNReconfiguration message for indicating the start/stop of using the Extra Unsubframe, preferably, this indication bit is named as TDD supplemental backhaul link subframe configuration enable indication (Extra-subframe configuration-enabled TDD); when the 1bits is "1", it means that the use of the Extra Un subframe is started, and when it is "0", it means that the use of the Extra Un subframe is stopped, and vice versa.

Preferably, the "Extra-subframe configuration-enabled tdd" may also be carried in a relay station subframe configuration information element (RN — subframe configuration information element), or independently as a "message" or an "information element", or add the enabling signaling in any downlink control indication format (DCIformat) in the LTE/LTE-a system.

With reference to the foregoing embodiments, the operation idea of the present invention for processing the backhaul link subframe may be represented by a flow shown in fig. 7, where the flow includes the following steps:

step 710: the network side indicates one or more items of the following information of the relay station through signaling: and configuring a supplementary backhaul link subframe, starting to use the supplementary backhaul link subframe, and stopping to use the supplementary backhaul link subframe.

Step 720: and the relay station starts to use the configured supplementary backhaul link subframe and the network side to transmit information or stops using the configured supplementary backhaul link subframe according to the signaling.

In order to ensure that the above embodiments and operation idea can be realized smoothly, the arrangement shown in fig. 8 can be performed. Referring to fig. 8, fig. 8 is a diagram of a backhaul link subframe processing system according to an embodiment of the present invention, where the system includes a supplementary backhaul link subframe indication unit and a supplementary backhaul link subframe control unit that are connected to each other. The supplementary backhaul link subframe indication unit may be disposed at a network side, and the supplementary backhaul link subframe control unit may be disposed in the relay station.

In practical application, the supplementary backhaul link subframe indication unit can indicate one or more of the following information by signaling: and configuring a supplementary backhaul link subframe, starting to use the supplementary backhaul link subframe, and stopping to use the supplementary backhaul link subframe. The supplementary backhaul link subframe control unit can start to use the configured supplementary backhaul link subframe and the network side to transmit information or stop using the configured supplementary backhaul link subframe according to the signaling.

In summary, the backhaul link subframe processing technology of the present invention can effectively improve the flexibility and adaptability of backhaul link resource configuration, achieve backward compatibility (compatible with LTE systems), and solve the problem of changing backhaul link subframe configuration, regardless of method or system.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method for processing a backhaul link subframe, the method comprising:

according to the requirement of the backhaul link, the network side indicates one or more of the following information of the relay node RN through signaling: configuring an Extra Un Subframe configuration for a supplementary backhaul link, starting using an indication of the Extra Un Subframe, and stopping using the indication of the supplementary backhaul link Subframe; the configuration of the supplementary backhaul link subframe is preset configuration, and comprises a determined supplementary backhaul link uplink/downlink subframe;

2. The method of claim 1,

3. The method of claim 1,

when the indication is performed through signaling on the network side, the signaling includes an indication of a supplementary backhaul link subframe, where the indication is a supplementary backhaul link subframe configuration index Extra Un subframe configuration tdd index, and the configured supplementary backhaul link uplink/downlink subframe may be determined by the supplementary backhaul link subframe configuration index.

4. The method of claim 1,

5. The method of claim 1,

6. The method of claim 1,

7. The method of claim 1,

8. The method according to claim 5 or 7,

9. The method of claim 2,

10. The method of claim 3,

when the network side indicates the subframe configuration index of the supplementary backhaul link through signaling, the network side indicates the subframe configuration index of the supplementary backhaul link by adopting a bitsmap of X bits or indicates the subframe configuration index of the supplementary backhaul link by a binary state of Y bits; where X is N, Y is ceil (log2(N)), and N is the total number of all available supplemental backhaul link subframe configuration indices in the system.

11. The method according to any one of claims 1 to 7,

12. The method according to any one of claims 1 to 7,

13. The method according to any one of claims 1 to 7,

14. The method according to any one of claims 1 to 7,

15. A processing system of a backhaul link subframe is characterized by comprising a supplementary backhaul link subframe indication unit and a supplementary backhaul link subframe control unit; wherein,

the supplementary backhaul link subframe indication unit is configured to indicate, through signaling, one or more of the following information of the supplementary backhaul link subframe control unit according to a backhaul link requirement: a supplementary backhaul link subframe configuration, an indication to start using the supplementary backhaul link subframe, and an indication to stop using the supplementary backhaul link subframe; the configuration of the supplementary backhaul link subframe is preset configuration, and comprises a determined supplementary backhaul link uplink/downlink subframe;

16. The system of claim 15,

17. The system of claim 15,

18. The system of claim 15,

19. The system of claim 15,

20. The system of claim 15,

21. The system of claim 15,

22. The system of claim 19 or 21,

23. The system of claim 16,

24. The system of claim 17,

25. The system according to any one of claims 15 to 21,

26. The system according to any one of claims 15 to 21,

27. The system according to any one of claims 15 to 21,

28. The system according to any one of claims 15 to 21,

29. The system according to any one of claims 15 to 21, wherein the supplementary backhaul link subframe indicator is disposed on a network side, and the supplementary backhaul link subframe controller is disposed in a relay station.

30. The system according to claim 29, wherein said network side comprises one or more of the following entities: the system comprises a base station, a relay node, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN and an operation, administration and maintenance OAM manager.