CN101160752A

CN101160752A - Mapping of MBMS service sign

Info

Publication number: CN101160752A
Application number: CNA2005800494405A
Authority: CN
Inventors: 金明哲
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2005-04-15
Filing date: 2005-04-15
Publication date: 2008-04-09
Also published as: MX2007012772A; AU2005330412B2; AU2005330412A1; WO2006109900A1; EP1875636A1; EP1875636A4; JP2008537869A; JP4516621B2

Abstract

The present invention is a method for identifying a point-to-multipoint service. When a plurality of point-to-multipoint services are multiplexed to one transport channel, a temporary service identifier (TSI) is defined and inserted into a MAC PDU header so that the plurality of point-to-multipoint services can be individually identified. Thus, overhead is reduced and multiple services having a different quality of service (QoS) or multiple streams of different QoS in the same service can be handled and provided to a mobile terminal.

Description

The mapping of MBMS service identifiers

Technical field

The present invention relates to mobile communication system, especially, relate to and be used for the interim service identifier (TSI) that the specific point-to-multipoint of sign is served among a plurality of point-to-multipoint services that transmit via specific transmission channel.

Background technology

Recently, developed mobile communication system significantly, but for high capacity data communication services, the performance of mobile communication system can't be mated with existing wired communication system.Therefore, carry out for the technological development of IMT-2000, IMT-2000 is the communication system that allows Large Volume Data communication, and seeks the standardization of this technology just energetically among various businesses and institutions.

Universal Mobile Telecommunications System (UMTS) is a 3-G (Generation Three mobile communication system), and it is from being called as the European standard development of global system for mobile communications (GSM).The purpose of this UMTS is to provide improved mobile communication service based on GSM core network and Wideband Code Division Multiple Access (WCDMA) (W-CDMA) wireless connect technology.

In December, 1998, the ETSI in Europe, ARIB/TTC, the T1 of the U.S. of Japan and the TTA of Korea S have formed third generation collaborative project (3GPP), to set up the detailed technology standard of UMTS technology.

In order to realize the rapid and otherwise effective technique development of UMTS,, five technical specification group (TSG) in this 3GPP, have been created, with the standardization of execution UMTS by considering the autonomous behavior of network element and their operations.

Each TSG develops, permits and manage this standard specifications in relevant field.Among these groups, Radio Access Network (RAN) group (TSG-RAN) exploitation is used for the standard of function, demand and the interface of UMTS Terrestrial radio access network network (UTRAN), and UTRAN is a new Radio Access Network of supporting the W-CDMA access technology in UMTS.

Fig. 1 illustrates the exemplary basic structure of conventional UMTS network.As shown in Figure 1, this UMTS roughly is divided into terminal (perhaps subscriber equipment: UE), UTRAN 100 and core network 200.

This UTRAN 100 comprises one or more RNSs (RNS) 110,120.Each RNS 110,120 comprises radio network controller (RNC) 111 and a plurality of base station or Node B 112,113 by this RNC111 management.This RNC 111 handles wireless resource allocation and management, and operates as access point with respect to this core network 200.

This Node B 112,113 receives the information that the physical layer by this terminal 10 sends via up link, and sends the data to this terminal via down link.Therefore this Node B 112,113 plays the effect of access point of the UTRAN 100 of terminal.

The basic function of this UTRAN 100 is to form and reservation RAB (RAB), to allow communication between terminal and core network 200.Core network 200 applies end-to-end quality of service (QoS) demand and gives RAB, and RAB supports the QoS demand by core network 200 settings.Because UTRAN 100 forms and keeps RAB, thereby satisfies QoS demand end to end.This RAB service can further be divided into Iu carrying service and radio bearer service.This Iu carrying service support user data transmission reliably between the boundary node of UTRAN 100 and core network 200.

Core network 200 comprises linking together and is used for the mobile switching center (MSC) 210 and the gateway mobile switching center (GMSC) 220 of support circuit-switched (CS) service, and links together and be used to support Serving GPRS Support Node (SGSN) 230 and the Gateway GPRS Support Node 240 of packet switching (PS) service.

The business that offers particular terminal roughly is divided into professional and packet switching (PS) business of circuit switching (CS).For example, conventional voice dialogue business is a circuit-switched service, and the World Wide Web browse service that connects via the internet is classified as packet switching (PS) business.

For support circuit switched service, RNC 111 is connected to the MSC210 of core network 200, and this MSC 210 is connected to this GMSC 220, and these GMSC 220 management are connected with other networks.

In order to support packet switching service, this RNC 111 is connected to the SGSN 230 and the GGSN 240 of core network 200.The packet communication that SGSN 230 supports are carried out towards the direction of RNC 111, and GGSN 240 management and other packet switching networks are such as the connection of internet.

Between network components, exist various types of interfaces to send mutually with reception information so that intercommunication mutually betwixt to allow this network components.Interface between RNC 111 and the core network 200 is defined as the Iu interface.Especially, this Iu interface that is used for the packet switching system between RNC 111 and core network 200 is defined as " Iu-PS ", and this Iu interface that is used for circuit switching system between RNC111 and core network 200 is defined as " Iu-CS ".

Fig. 2 illustrates according to the terminal of 3GPP Radio Access Network standard and the structure of the Radio interface protocols between the UTRAN.

As shown in Figure 2, this Radio interface protocols has level course and vertical plane, this level course comprises physical layer, data link layer and network layer, and this vertical plane comprises user plane (U plane) that is used to send user data and the control plane (C plane) that is used to send control information.

User plane is the zone of handling such as the user service information of voice or Internet Protocol (IP) grouping, and this control plane is the zone of control information, maintenance and administer calls of manipulation network interface or the like.

This protocol layer among Fig. 2 can be divided into ground floor (L1), the second layer (L2) and the 3rd layer (L3) based on three lower levels of OSI(Open Systems Interconnection) master pattern.Each layer is with as described in more detail below.

Ground floor (L1), that is, this physical layer provides information transfer service by using various Radio Transmission Technologys to the upper strata.This physical layer is connected to the upper strata that is called medium access control (MAC) layer via transmission channel.This MAC layer and physical layer transmit and receive data mutually via transmission channel.

The second layer (L2) comprises MAC layer, Radio Link control (RLC) layer, broadcasting/multiplex broadcasting control (BMC) layer and PDCP (PDCP) layer.

The MAC layer is provided for distributing and redistributing the distribution services of the MAC parameter of Radio Resource.The MAC layer is connected to the upper strata that is called Radio Link control (RLC) layer via logic channel.

Various logic channels are provided according to the information type that transmits.Usually, when transmitting the information of control plane, use control channel.When transmitting the information of user plane, use Traffic Channel.Whether depend on the shared logic channel, logic channel can be common signal channel or dedicated channel.The logic broadcast channel comprises Dedicated Traffic Channel (DTCH), Dedicated Control Channel (DCCH), CTCH Common Traffic Channel (CTCH), Common Control Channel (CCCH), broadcast channel (BCCH) and Paging Control Channel (PCCH) or SHCCH Shared Channel Control Channel (SHCCH).BCCH provides the information that comprises the information of being used by terminal with access system.This PCCH is used with access terminal by this UTRAN.

For the purpose of MBMS, there are supplementary service and control channel.For example, MCCH (MBMS point-to-multipoint control channel) is used to transmit the MBMS control information, and MTCH (MBMS point multipoint message traffic channel) is used to transmit the MBMS service data.In addition, MSCH (MBMS point-to-multipoint scheduling channel) is four transmission schedule informations.

This MAC layer is connected to physical layer by transmission channel, and can be divided into MAC-b sublayer, MAC-d sublayer, MAC-c/sh sublayer and MAC-hs sublayer according to the type of the transmission channel of being managed.This MAC-b sublayer management BCH (broadcast channel), it is a transmission channel of handling this system information broadcast.This MAC-d sublayer management dedicated channel (DCH), it is the dedicated transmission channel that is used for particular terminal.Therefore, the MAC-d sublayer of this UTRAN is arranged in the service wireless network controller (SRNC) of management corresponding terminal, and also has a MAC-d sublayer in each terminal (UE).

MAC-c/sh sublayer managing common transmission channel, such as forward access channel (FACH) or downlink sharied signal channel (DSCH), it is shared by a plurality of terminals.In UTRAN, this MAC-c/sh sublayer is arranged in control radio network controller (CRNC).Because therefore the channel that the management of MAC-c/sh sublayer is shared by all terminals in a sub-district exists single MAC-c/sh sublayer for each cell area.And, also have a MAC-c/sh sublayer in each terminal (UE).

The reliable transfer of data of this rlc layer support, and carry out for a plurality of RLC service data units (RLC SDU) of discharging from the upper strata and to cut apart and cascade function.When rlc layer received RLC SDU from the upper strata, rlc layer was adjusted the size of each RLC SDU based on disposal ability in suitable mode, generates some data cell by header information being made an addition to it then.The data cell of this generation is known as protocol Data Unit (PDU), and the unit of these protocol datas is transmitted to this MAC layer via logic channel then.This rlc layer comprises the RLC buffer that is used to store RLC SDU and/or RLC PDU.

The cell broadcast information (being called as " CB message " hereinafter) that the scheduling of this BMC layer receives from core network, and with the CB information broadcast to the terminal that is arranged in specific sub-district (a plurality of).The BMC layer of UTRAN produces broadcast/multi broadcast control (BMC) message by adding to the CB message that receives from the upper strata such as the information of message id (identifier), sequence number and encoding scheme, and sends BMC message to rlc layer.This BMC message is via logic channel, that is, CTCH (CTCH Common Traffic Channel) is sent to the MAC layer from rlc layer.This CTCH is mapped to transmission channel, that is, FACH, it is mapped to physical channel, that is, and S-CCPCH (Secondary Common Control Physical Channel).

This PDCP (PDCP) layer is more high-rise as this rlc layer, allow via procotol (such as, IPv4 or IPv6) the relatively little bandwidth efficient ground of data utilization that transmits transmits on wave point.In order to realize these, the PDCP layer is carried out the function that reduces the unnecessary control information that is used for wired network, and this class function is known as header suppression.

On the lowermost portion of L3 layer, there is Radio Resource control (RRC) layer.Rrc layer only defines in this control plane, and with respect to the setting of radio bearer (RB), the control of resetting and discharging processing logic channel, transmission channel and physical channel.Radio bearer service refers to the service that the second layer (L2) provides transfer of data between terminal and the UTRAN, and normally, radio bearer is set refers to definition the protocol layer and the channel characteristics of the required channel of special services are provided, and substantial parameter and method of operation are set respectively.

Depend on the type of the layer that connects on the upper strata of rlc layer, this rlc layer can belong to user plane, perhaps can belong to control plane.That is to say that if rlc layer receives data from rrc layer, this rlc layer belongs to control plane.Otherwise this rlc layer belongs to user plane.

Now this MAC head will be described in more detail.Fig. 3 illustrates the structure of the MAC layer that is used for UTRAN.Fig. 4 to 7 illustrates the MAC-d of UTRAN and the structure of MAC-c/sh sublayer, and wherein rectangular module illustrates each function of MAC layer.Now its basic function will be described.

This MAC layer is present between RLC and the physical layer, and its major function is mutual mapping logic channel and transmission channel.The MAC layer needs such channel Mapping, because the channel processing method of the high level of MAC layer is different from the channel processing method of the lower floor of MAC layer.That is, in the high level of MAC layer, channel is divided into the Traffic Channel of the control channel and the user plane of control plane according to the data content in this channel.But in the low layer of MAC layer, how channel is shared according to this channel is divided into common signal channel and dedicated channel.Therefore, extremely important in the high level and the channel Mapping between the low layer of MAC layer.The relation of channel Mapping is shown in Figure 4, and it illustrates the schematic diagram of channel Mapping in UE.

Another major function of this MAC layer is that logic channel is multiplexing.This MAC layer is multiplexed with a transmission channel with several logic channels, so that obtain a spatial multiplexing gain.Spatial multiplexing gain is important for the business of indexing transfer such as signaling information or data packets data.For circuit data, do not use multiplexingly usually, because data are transmitted continuously, therefore, this spatial multiplexing gain is not high relatively.

The multiplexing function of the channel Mapping of this MAC layer and logic channel is favourable aspect two of efficient that improves flexibility that channel selects and channel resource, but in order to support these advantages, needs certain identification function.

Sign is divided into two types: UE sign and Logic Channel Identifier.At first, the UE sign needs Common transport channel, because Common transport channel is shared by a plurality of UE.Secondly, when several logic channels are multiplexed with a transmission channel, need the Logic Channel Identifier needs.For the purpose that identifies, the MAC layer inserts TCTT (destination channel type field), UE-Id type, UE-Id and/or C/T (control/business) field in the head of MAC PDU into.

In more detail, work as dedicated logical channel, be mapped to Common transport channel, in the time of such as CPCH, DSCH or USCH, need the UE sign such as DCCH or DTCH.In order to realize these, this MAC layer adds UE-ID field to the MACPDU head with RNTI (Radio Network Temporary Identifier).Current, three kinds of RNTI are used to identify specific UE such as U-RNTI (UTRANRNTI), C-RNTI (sub-district RNTI) and DSCH-RNTI.Use three kinds of RNTI, notice to use the UE-ID type field of which RNTI also to be added head owing to exist to MAC PDU.

For Logic Channel Identifier, use two levels of logical channel identification.Ground floor is the logical channel type identification that is provided by TCTF (destination channel type field), and the second layer is the dedicated logical channel sign that is provided by C/T (control/business) field.

TCTF need be used for the Common transport channel such as FACH and RACH, the logic channel of multiplexing several types on these channels.For example, BCCH, CCCH, CTCH and one or more dedicated logical channel (DCCH or DTCH) can side by side map on the FACH, and the logic channel of CCCH and one or more special uses can side by side be mapped on the RACH.Therefore, this TCTF provides logical channel type identification on FACH and RACH, that is, the reception data on FACH or RACH belong to BCCH, CCCH, CTCH, perhaps one of dedicated logical channel.

Though the type of this TCTF sign logic channel, it does not identify each logic channel.Can be when other logic channels shine upon when dedicated logical channel, this TCTF need be used for transmission channel.Therefore, this TCTF sign logic channel is dedicated logical channel or other logic channels.But, for common logical, because only a common logical of identical type can be mapped on the transmission channel, so under the situation of common logical, this TCTF also provides Logic Channel Identifier.

On the contrary, more than one dedicated logical channel can map to FACH or RACH simultaneously.In other words, several DCCH or DTCH can map to FACH or RACH.Therefore, for dedicated logical channel, except the sign of logical channel type, need the sign of each dedicated logical channel.This CYT field plays this purpose.

The sign of each dedicated logical channel is by using the C/T field to carry out for the following reasons.At first, different with common logical, a plurality of dedicated logical channel can map to a transmission channel simultaneously.Secondly, dedicated logical channel is handled by the MAC-d among the SRNC, and other common logical are handled by MAC-c/sh.The a plurality of dedicated logical channel that map to same transmission channel have their Logic Channel Identifier respectively.In addition, such value is used as the C/T field value.If only have a dedicated logical channel, then do not use the C/T field for transmission channel.

Table 1 illustrates the different identification symbol of MAC head below, uses these identifiers according to the mapping relations between logic channel that is used for FDD and the transmission channel.In table 1, when several dedicated logical channel (DCCH or DTCH) are mapped, there is the C/T field.In addition, " N " expression does not have head, and "-" expression does not have mapping relations, and not only there is the UE-ID field in " UE-ID " expression but also have the UE-ID type field.The UE-ID field exists with the UE-ID type field all the time.

[table 1]

	DCH	RACH	FACH	DSCH	CPCH	BCH	PCH
	DCH	RACH	FACH	DSCH	CPCH	BCH	PCH	DCCH or DTCH	C/T	TCTF UE-ID C/T	TCTFUE -IDC/T	UE-ID C/T	UE-ID C/T	-	-
BCCH	-	-	TCTF	-	-	N		DCCH or DTCH	C/T	TCTF UE-ID C/T	TCTFUE -IDC/T	UE-ID C/T	UE-ID C/T	-	-
BCCH	-	-	TCTF	-	-	N		PCCH	-	-	-	-	-	-	N
CCCH	-	TCTF	TCTF	-	-	-	-	PCCH	-	-	-	-	-	-	N
CCCH	-	TCTF	TCTF	-	-	-	-	CTCH	-	-	TCTF	-	-	-	-

As above shown in the table, in the prior art, the logic channel of the common type of similar BCCH, PCCH, CCCH and CTCH does not have the C/T field of each logic channel of sign.This is because common logical that will several same types is multiplexed with a transmission channel in the prior art.This reason is that receiving terminal (receiver) needn't receive the common logical of more than one same type simultaneously because identical information is transmitted on the common logical of same type.Therefore, the single Common transport channel of similar FACH or RACH only carries the common logical of a same type all the time, and needn't add the C/T field that is used for common logical in the prior art.

Recently, proposed to be called the new COS of MBMS (multimedia broadcast/multi broadcast service).MBMS is to use unidirectional point-to-multipoint carrying service to transmit multi-medium data, gives PS (packet switching) the territory service of a plurality of terminals such as audio frequency, picture, video or the like.When UMTS network 1 uses the multicast pattern that specific MBMS is provided, provide the UE of this service must at first finish between service provider and each UE the booking process of opening relationships respectively.After this, the Service Notification that this user UE subscribes from these core network 200 confirmations of receipt, and for example a series of services that will provide are provided.

Because the MBMS data are shared by a plurality of users, so it is as transmitting via common logical in the prior art.But because MBMS is multimedia service, thereby a plurality of streams of different QoS can offer single UE or can offer different UE in a plurality of services of different QoS or the same services.Expectation is when providing MBMS, and a plurality of common logical of same type need map to same transmission channel.

Summary of the invention

In the prior art, a plurality of common logical of same type are not mapped to same transmission channel usually.A problem is not have common logical channel identifier in the MAC head.Another problem is not have identification function in MAC-c/sh.Therefore, when the packet switching that MBMS or other types will be provided (PS) territory is served, should consider the function of new common logical channel identification.

In addition, in MBMS, between MBMS service and common logical (such as MTCH (MBMS Traffic Channel)), there are mapping relations one to one.Therefore, as mentioned above, because a plurality of common logical of same type will be mapped to same transmission channel when MBMS is provided, so a plurality of MBMS service can transmit via same transmission channel.Therefore, portable terminal can side by side receive the different service that transmits via same transmission channel.

Identify different MBMS services globally by the MBMS service identifier.But, have thousands of different services potentially.If use the MBMS service identifier, be used to allow the MAC heads of the different services of portable terminal difference so, comprise the MBMS service identifier, size will be very big, and will have very big expense during the transmission.Therefore, need a kind of small-sized method that different services keeps the MAC head simultaneously again that is used to identify.

The present invention relates to be used for the interim service identifier (TSI) of sign point-to-multipoint service among a plurality of point-to-multipoint services that transmit via specific transmission channel.

Feature of the present invention and advantage will be set forth in description subsequently, and will be apparent to a certain extent from this description, perhaps can learn by putting into practice the present invention.Structure by especially pointing out in the specification of book and claim herein and appended accompanying drawing can realize and obtain purpose of the present invention and other advantage.

In order to realize the advantage of these and other, and it is consistent with purpose of the present invention, as implementing herein and describing widely, the present invention preferably is embodied in a kind of sign point-to-multipoint service method among a plurality of point-to-multipoint services that transmit via transmission channel that is used in wireless communication system, this method comprises: to the point-to-multipoint service identifier of each allocation identification point-to-multipoint service of a plurality of point-to-multipoints service, generation is used to represent to distribute the point-to-multipoint service identifier to give each map information of a plurality of point-to-multipoints services, transmit map information and give portable terminal, be provided for producing the media access control layer of at least one at least one related protocol Data Unit of serving with a plurality of point-to-multipoints, in media access control layer, produce at least one protocol Data Unit, to at least one the point-to-multipoint service identifier of at least one protocol Data Unit additional allocation, and will comprise that via transmission channel at least one protocol Data Unit of the point-to-multipoint service identifier of distribution sends portable terminal to according to map information to the service of a plurality of point-to-multipoints.

In one aspect of the invention, the distribution of point-to-multipoint service identifier is handled by the radio resource control layer of network.The mapping letter is to produce in the radio resource control layer of network.

Of the present invention more detailed aspect in, the radio resource control layer of network transmits the media access control layer that map information is given network.In addition, the radio resource control layer of this network transmits the radio resource control layer that map information is given portable terminal.Preferably, the radio resource control layer of portable terminal transmits the media access control layer that map information is given portable terminal.

In another aspect of the present invention, transmission channel is FACH.Protocol Data Unit transmits via common logical MTCH.

Preferably, this method further comprises: send the value of distributing to the point-to-multipoint service identifier of each point-to-multipoint service respectively to the media access control layer of network and the radio resource control layer that the value of point-to-multipoint service identifier is sent to portable terminal.In addition, the radio resource control layer of this portable terminal sends the value of point-to-multipoint service identifier to the media access control layer of portable terminal.

In another aspect of the present invention, this point-to-multipoint service identifier has 4 length, and transmits maximum 16 point-to-multipoint services via transmission channel.Preferably, this point-to-multipoint service identifier is attached to the head of at least one protocol Data Unit.

According to an alternative embodiment of the invention, a kind of among a plurality of point-to-multipoints services that receive via transmission channel by the portable terminal in the wireless communication system sign point-to-multipoint service method, comprise: receive from network and be used to represent to distribute the point-to-multipoint service identifier to give each map information of a plurality of point-to-multipoints services, in media access control layer, receive at least one at least one related protocol Data Unit with a plurality of point-to-multipoint services, at least one the point-to-multipoint service identifier of wherein distributing to the service of a plurality of point-to-multipoints is attached at least one protocol Data Unit, and determines to handle at least one protocol Data Unit by the point-to-multipoint service identifier that utilizes the map information evaluation to distribute.

In one aspect of the invention, the distribution of this point-to-multipoint service identifier is handled by the radio resource control layer of network.Map information produces in the radio resource control layer of network.

One more detailed aspect in, the radio resource control layer of this portable terminal receives map information from the radio resource control layer of network.Preferably, the radio resource control layer of portable terminal transmits the media access control layer that map information is given portable terminal.

In another aspect of the present invention, transmission channel is FACH.

Preferably, this method comprises that further reception distributes to the value of the point-to-multipoint service identifier of each point-to-multipoint service respectively, wherein the value of point-to-multipoint service identifier produces in the radio resource control layer of network, and sends the radio resource control layer of portable terminal to.In addition, the radio resource control layer of portable terminal sends the value of point-to-multipoint service identifier to the media access control layer of portable terminal.

In another aspect of the present invention, the point-to-multipoint service identifier has 4 length, and receives maximum 16 point-to-multipoint services via transmission channel.In addition, this point-to-multipoint service identifier is attached to the head of at least one protocol Data Unit.

According to one embodiment of the present of invention, determining step comprises the point-to-multipoint service identifier that reads distribution, and by reading map information, determine coupling point-to-multipoint service corresponding to the point-to-multipoint service identifier that distributes, if wherein coupling point-to-multipoint service is that portable terminal is wanted the service that receives, then handle at least one protocol Data Unit, if wherein coupling point-to-multipoint service is that portable terminal is not wanted the service that receives then to abandon at least one protocol Data Unit.

Should be understood that above general introduction and following detailed description of the present invention are exemplary and illustrative, and the of the present invention further explanation of institute's request right is provided.

Description of drawings

This accompanying drawing of following is included to provide further to be understood the present invention, and is incorporated into and constitutes the part of this specification, and it illustrates embodiments of the invention, and can work to explain the principle of the invention with this specification.

Fig. 1 is the block diagram of the UMTS network configuration of routine.

Fig. 2 is based on the block diagram of radio interface protocol architecture between the terminal of 3GPP Radio Access Network standard and the UTRAN.

Fig. 3 is the block diagram of the MAC layer conventional structure of UTRAN.

Fig. 4 is the schematic diagram of the MAC-c/sh conventional structure of portable terminal.

Fig. 5 is the schematic diagram of the MAC-c/sh conventional structure of UTRAN.

Fig. 6 is the schematic diagram of the MAC-d conventional structure of portable terminal.

Fig. 7 is the block diagram of the MAC-d conventional structure of UTRAN.

Fig. 8 is the schematic diagram in the mapping relations between logic and the transmission channel (on the UE side).

Fig. 9 and Figure 10 are the schematic diagrames according to the MAC PDU form of one embodiment of the invention.

Figure 11 is the schematic diagram according to the MAC structure of the UTRAN of one embodiment of the invention.

Figure 12 is the schematic diagram according to the MAC structure of the portable terminal of one embodiment of the invention.

Figure 13 is the schematic diagram that TSI (interim service identifier) field value according to one embodiment of the invention distributes.

Figure 14 is the schematic diagram according to the transfer of data of one embodiment of the invention.

Embodiment

To at length be introduced the preferred embodiments of the present invention now, the accompanying drawing illustrated that its example is being followed.

The present invention relates to be used for the interim service identifier (TSI) of the specific MBMS service of sign among a plurality of MBMS services that transmit via transport channel.The present invention is by the TSI field being inserted in the head corresponding to medium access control (MAC) layer data unit of MBMS service, and via transport channel this data cell is sent to portable terminal realizes.This portable terminal determines to receive this data cell according to the map information that receives from UTRAN, and wherein which MBMS service map information is assigned to portable terminal notice TSI field value.

Fig. 9 and 10 illustrates the MAC PDU form according to one embodiment of the invention, wherein works as common logical, by via Common transport channel, when transmitting such as FACH, uses this MAC PDU form such as the data of MTCH.The head that TCTF and TSI field comprise MAC PDU is shown simultaneously, and MAC SDU comprises the payload of MAC PDU.

With reference to figure 9 and 10, preferably, there is two types MAC PDU form.In first type, this MAC PDU head comprises TCTF and TSI field, as shown in Figure 9.When the transmission channel such as FACH carries dissimilar logic channels, use such MAC PDU.Here, the type of this TCTF field identification logic channel, and the MBMS that this TSI field identification will transmit on logic channel serves.

In second type, this MAC PDU head comprises the TSI field that is used to identify the MBMS service that will transmit on logic channel, as shown in figure 10.Therefore, do not comprise the TCTF field.When this transmission channel only can carry one type common logical, use such MAC PDU.Here, as first type, this TSI field is included in the head, still, does not need this TCTF field, because the type of transmission channel sign logic channel itself.

Therefore, when this transmission channel can carry the logic channel of an above type, the TCTF field was present in the MAC PDU head.In addition, when more than one MBMS service was multiplexed into transmission channel, the TSI field was present in the MAC PDU head.

Figure 11 illustrates the MAC structure according to the UTRAN of one embodiment of the invention.Figure 12 illustrates the MAC structure according to the portable terminal of one embodiment of the invention.

With reference to Figure 11 and 12, when the common logical such as MTCH was re-used, this MAC carried out TSI multiplexing (MUX) function.Preferably, when MTCH was multiplexed into a transmission channel, MAC carried out TSI MUX function.The TSI field that the TSIMUX function of MAC will be used for identifying the MBMS service among the UTRAN is inserted in the head of corresponding M AC PDU.Read the TSI field information of sign MBMS service from the head of the MAC PDU that receives after, the TSI MUX function of MAC is removed the TSI field in the portable terminal from MAC PDU.

Figure 13 is the schematic diagram that illustrates according to one embodiment of the invention distribution T SI field value.The rrc layer of UTRAN is managed the grouping of several MBMS service, is used for multiplexingly to a transmission channel, such as FACH, and gives each MBMS service assignment TSI field value.Can be clearly or impliedly provide time of distribution T SI.For example, before portable terminal changed the sub-district, perhaps till distributing variation, this distribution can be effective.In addition, this TSI preferably transmits on the useful life period ground of the MBMS service that activates.In MBMS, between MBMS service and common logical (such as MTCH), there is one-one relationship.Therefore, the rrc layer of this UTRAN is also managed and is carried the grouping of several common logical of MBMS service separately, is used for multiplexing to a transmission channel.In addition, the rrc layer of this UTRAN produces the map information which MBMS service which TSI field value of expression is assigned to.

The size of this TSI field can be very little.Thereby this TSI allows to distinguish service seldom.But, suppose that under standard situation considerably less service is transmitted simultaneously on one's own initiative, has undersized TSI, such as 4, will be preferable, so that keep low expense.In addition, suppose that transport module has 336 size, and possible service number is limited to 4000 services, this will hint that the prior art identification field will need 12 size.This is converted into 3.5% expense.But, in the present invention, for example being used to identify maximum 16 services if having the TSI field of 4 sizes, this expense will be reduced to 1.2%.

With reference to Figure 13, explanation is used for the method for distribution T SI field value.Give their MBMS services separately at the rrc layer distribution T SI of UTRAN field value, and after the generation map information, rrc layer sends TSI field value, map information and MBMS service multiplexing information medium access control (MAC) layer (S10) of UTRAN to, and the extremely specific transmission channel of this MBMS service multiplexing information and multiplexing a plurality of MBMS services is relevant.

The rrc layer of this UTRAN also sends TSI field value, map information and MBMS service multiplexing information to the rrc layer (S20) of portable terminal or UE.This information can send once or periodically send.Preferably, the information of TSI field value, map information and MBMS service multiplexing is transmitted to the rrc layer of all portable terminals that will receive transport channel.The rrc layer that has received the portable terminal of TSI field value, map information and MBMS service multiplexing information sends the information that receives on the MAC layer (S30) of portable terminal.

Figure 14 is the schematic diagram according to the transfer of data of one embodiment of the invention.Here, a plurality of MBMS services are multiplexed into a Common transport channel, such as FACH.In addition, each MBMS service is in separately common logical, goes up such as MTCH and transmits.

With reference to Figure 14, explanation is used for transmitting a plurality of MBMS service method via transport channel.This method comprises that the data cell of multiplexing a plurality of MBMS services to specific transmission channel, transmits this multiplexing data cell and gives portable terminal, and the data cell that demultiplexing transmits in this portable terminal.Multiplexing step comprises the multiplexing data that receive via a plurality of common logical, and the additional head of giving the data that receive of TSI field producing protocol Data Unit (PDU), and is transmitted the PDU that produces via specific transmission channel.

The demultiplexing step comprises via specific transmission channel receiving data units, check the TSI field that receives data, separate the data of taking this reception according to map information, and will determine that via the common logical of TSI appointment the data that will receive are sent to the high level in the portable terminal.

Further with reference to Figure 14, though transmit two MBMS services via same transmission channel as shown, preferably, according to one embodiment of the present of invention, maximum 16 services can transmit via same transmission channel.In addition, preferably, the common logical MTCH#1 and the MTCH#2 that carry MBMS#1 and MBMS#2 are multiplexed into a Common transport channel FACH respectively.More preferably, the peer-to-peer of the RLC entity #1 on the UTRAN is the RLC entity #1 on portable terminal or the UE, and the peer-to-peer of the RLC entity #2 on the UTRAN is the RLC entity #2 on the portable terminal.

It is as follows to be used for transmitting a plurality of MBMS service method via transport channel.At first, the RLC entity #1 of UTRAN produces the MAC SDU#1 of service MBMS #1, and MAC SDU#1 is sent to the MAC layer (S110) of UTRAN via MTCH#1.Simultaneously, the RLC entity #2 of UTRAN produces the MAC SDU#2 of service MBMS #2, and MAC SDU#2 is sent to the MAC layer (S120) of UTRAN via MTCH#2.

Multiplexing then MTCH#1 of the MAC layer of UTRAN and MTCH#2, and will comprise that the MAC head of TSI field adds to MAC SDU#1 to constitute MAC PDU#1 (S130).Here, the TSI field value that is included in the head of MAC PDU#1 can be represented common logical MTCH#1, and sign MAC PDU#1 is relevant with MBMS#1.As mentioned above, the TSI field value receives with map information rrc layer from this UTRAN in the MAC layer.Therefore, when MAC SDU received in the MAC layer, this MAC layer knew which MBMS which TSI field value will map to according to map information.Here, when the MAC SDU#1 corresponding to MBMS#1 was received, this MAC layer had head corresponding to the TSI field value of MBMS#1 to constitute MAC PDU#1 according to map information is additional.

By means of identical scheme, comprise that the MAC head of TSI field is attached to MACSDU#2 to constitute MAC PDU#2 (S130).The TSI field value that is included in the head of MAC PDU#2 can be represented common logical MTCH#2, and sign MAC PDU#2 is relevant with MBMS#2.In addition, because the map information that receives from the rrc layer of UTRAN in the MAC layer, the MAC layer is known the mapping relations between the TSI field value that receives and any MBMS service.Therefore, when the MAC SDU#2 corresponding to MBMS#2 received in the MAC layer, this MAC layer had head corresponding to the TSI field value of MBMS#2 to constitute MAC PDU#2 according to this map information is additional.

The MAC layer of this UTRAN sends MAC PDU#1 and MAC PDU#2 to via same transmission channel FACH the physical layer (S140) of UTRAN.MAC PDU#1 and MAC PDU#2 are transmitted to the physical layer of portable terminal then via air interface.The MAC layer that the physical layer of portable terminal sends the MAC PDU#1 that receives and MAC PDU#2 to this portable terminal via the same transmission channel FACH of portable terminal.

After receiving MAC PDU#1 and MAC PDU#2, the MAC layer inspection of portable terminal is included in the TSI field among the MAC PDU of reception, and determines to receive this MAC PDU (S150) in view of the above.Preferably, this MAC layer detects the TSI field value from the head of MAC PDU, and determines that the MAC PDU that receives is whether relevant with the MBMS service that this portable terminal has been subscribed.If this MAC PDU is relevant with the MBMS service of being subscribed by this portable terminal, then this portable terminal continues to receive this MAC PDU.If this MACPDU is irrelevant with the MBMS service of being subscribed by this portable terminal, then this portable terminal abandons this MAC PDU.

The map information that use receives from the rrc layer of this portable terminal, it is that rrc layer from this UTRAN receives, as mentioned above, the MAC layer of this portable terminal determines whether this MAC PDU is relevant with the MBMS service of subscribing.Especially, the MAC layer of this portable terminal mates the TSI field value and the corresponding M BMS service that receive according to this map information.If corresponding M BMS service is the service that this portable terminal has been subscribed, so, this portable terminal just extracts this MAC SDU, and it is transmitted to high level.But if corresponding M BMS service is the service that this portable terminal does not have reservation, so, this portable terminal just abandons this MACPDU.

Preferably, will be received if determine this MAC PDU, then the MAC layer of this portable terminal also in the TSI field, check about transmission MAC PDU the information of common logical of process.Here, if determine to receive MAC PDU#1 and MAC PDU#2, then the MAC layer of this portable terminal is checked MAC PDU TSI field separately, with the processing (S150) of the MAC PDU that determines whether to carry out reception.

Therefore, if the TSI field that detects is represented common logical MTCH#1, then corresponding M AC SDU#1 sends the RLC entity #1 (S160) of this portable terminal to via MTCH#1.Here, be correct if receive, so, this portable terminal confirms that the MAC SDU corresponding to MTCH#1 is MAC SDU#1.Similarly, if the TSI field that detects is represented common logical MTCH#2, then corresponding M AC SDU#2 sends the RLC entity #2 (S170) of this portable terminal to via MTCH#2.Here, be correct if receive, so, this portable terminal confirms that the MAC SDU corresponding to MTCH#2 is MACSDU#2.

Therefore, in the present invention, the MAC layer of this UTRAN and portable terminal is carried out the multiplexing and demultiplexing function that is used for a plurality of MBMS services of transmitting via common logical separately respectively.The TSI field value is used to identify each MBMS service, makes multiplexing a plurality of MBMS service to same transmission channel become possibility.Therefore, expense is lowered, because there is no need to use overall MBMS identifier, this has very big expense.In addition, a plurality of streams of different QoS can offer single mobile terminal in a plurality of services of different QoS or the same services, and this is the basic characteristics that are used for next generation mobile communication system.Thereby, instruction of the present invention and suggestion are applicable to that the motivation of radio (wireless) communication plan of various kinds will be expressly understood by those those of ordinary skills.

Though described the present invention under the background of mobile communication, the present invention can also use in the wireless communication system of any use mobile device, such as the PDA and the portable computer that are equipped with performance for wireless communications.In addition, should be for describing some term used in the present invention with limit the scope of the present invention to the wireless communication system of some type, such as UMTS.The present invention is also applicable to the wireless communication system of different air interfaces of other use and/or physical layer, for example, and TDMA, CDMA, FDMA, WCDMA or the like.

The preferred embodiment can be implemented as method, device or uses the goods of standardization program and/or engineering, to produce software, firmware, hardware or it makes up arbitrarily.This term " goods " of Shi Yonging refers to and (for example is implemented in hardware logic herein, integrated circuit (IC) chip, field programmable gate array (FPGA), application-specific integrated circuit (ASIC) (ASIC) or the like), perhaps computer-readable medium (for example, magnetic storage medium (for example, hard disk drive, floppy disk, tape or the like), optical storage (CD-ROM, CD or the like), volatibility and nonvolatile memory device (for example, EEPROM, ROM, PROM, RAM, DRAM, SRAM, firmware, FPGA (Field Programmable Gate Array) or the like)) in code or logic.

Code in computer-readable medium is by processor access and execution.The code of wherein realizing preferred embodiment can further be via transmission medium or addressable from file server through network.In the case, the goods of code can comprise transmission medium, such as Network transmission line, wireless transmission medium, via the signal of space, radio wave, infrared signal or the like transmission.Certainly, those skilled in the art will understand, and do not depart from the scope of the present invention to carry out a lot of modifications to these structures, and these goods can be included in any information bearing medium that this area is known the sixth of the twelve Earthly Branches.

The above embodiments and advantage only are exemplary, and should not be construed as restriction the present invention.Current instruction can easily be applied to the device of other types.Description of the invention is intended that illustrative, rather than limits the scope of this claim.Replacement, modifications and variations many for those skilled in the art will be conspicuous.In those claims, device adds the function clause and is intended that when carrying out the function enumerate and covers structure described herein, and is not only structural equivalence, also comprises the structure of equivalence.

Claims

1. one kind is used for sign point-to-multipoint service method among a plurality of point-to-multipoint services that transmit via transmission channel in wireless communication system, and this method comprises:

Point-to-multipoint service identifier to the described point-to-multipoint service of each allocation identification of described a plurality of point-to-multipoint services;

Produce each the map information that described a plurality of point-to-multipoint services are distributed to described point-to-multipoint service identifier in expression;

Send described map information to portable terminal;

The media access control layer that produces at least one at least one related protocol Data Unit of serving with described a plurality of point-to-multipoints is provided;

In described media access control layer, produce described at least one protocol Data Unit;

According to described map information, at least one the described point-to-multipoint service identifier of described at least one protocol Data Unit additional allocation to described a plurality of point-to-multipoints service; And

Described at least one protocol Data Unit that will comprise the point-to-multipoint service identifier of described distribution via described transmission channel sends described portable terminal to.

2. method according to claim 1, the distribution of wherein said point-to-multipoint service identifier is handled by the radio resource control layer of network.

3. method according to claim 1, wherein said map information produces in the radio resource control layer of network.

4. method according to claim 3, the radio resource control layer of wherein said network transmit the media access control layer that described map information is given described network.

5. method according to claim 3, the radio resource control layer of wherein said network transmit the radio resource control layer that described map information is given described portable terminal.

6. method according to claim 5, the radio resource control layer of wherein said portable terminal transmit the media access control layer that described map information is given described portable terminal.

7. method according to claim 1, wherein said transmission channel is FACH.

8. method according to claim 1, wherein said protocol Data Unit transmits via common logical MTCH.

9. method according to claim 1 further comprises: the media access control layer that the value of distributing to the described point-to-multipoint service identifier of each described point-to-multipoint service is respectively sent to network.

10. method according to claim 9 comprises that further the value with described point-to-multipoint service identifier sends the radio resource control layer of described portable terminal to.

11. method according to claim 10, the radio resource control layer of wherein said portable terminal send the value of described point-to-multipoint service identifier to the media access control layer of described portable terminal.

12. method according to claim 1, wherein said point-to-multipoint service identifier has 4 length.

13. method according to claim 1, wherein maximum 16 point-to-multipoint services transmit via described transmission channel.

14. method according to claim 1, wherein said point-to-multipoint service identifier is attached to the head of described at least one protocol Data Unit.

15. one kind is identifying the point-to-multipoint service method by the portable terminal in the wireless communication system among a plurality of point-to-multipoint services that transmission channel receives, this method comprises:

Receive each the map information that described a plurality of point-to-multipoint services are distributed to the point-to-multipoint service identifier in expression from network;

In media access control layer, receive at least one at least one related protocol Data Unit of serving with described a plurality of point-to-multipoints,

At least one the point-to-multipoint service identifier of wherein distributing to described a plurality of point-to-multipoint service is attached to described at least one protocol Data Unit; And

Determine to handle described at least one protocol Data Unit by the point-to-multipoint service identifier that utilizes described map information to estimate described distribution.

16. method according to claim 15, the distribution of wherein said point-to-multipoint service identifier is handled by the radio resource control layer of described network.

17. method according to claim 15, wherein said map information produces in the radio resource control layer of described network.

18. method according to claim 17, the radio resource control layer of wherein said portable terminal receives described map information from the radio resource control layer of described network.

19. method according to claim 18, the radio resource control layer of wherein said portable terminal transmit the media access control layer that described map information is given described portable terminal.

20. method according to claim 15, wherein said transmission channel is FACH.

21. method according to claim 15 comprises that further reception distributes to the value of the point-to-multipoint service identifier of each described point-to-multipoint service respectively.

22. method according to claim 21, the value of wherein said point-to-multipoint service identifier produces in the radio resource control layer of described network, and sends the radio resource control layer of described portable terminal to.

23. method according to claim 22, the radio resource control layer of wherein said portable terminal send the value of described point-to-multipoint service identifier to the media access control layer of described portable terminal.

24. method according to claim 15, wherein said point-to-multipoint service identifier has 4 length.

25. method according to claim 15, wherein maximum 16 point-to-multipoint services receive via described transmission channel.

26. method according to claim 15, wherein said point-to-multipoint service identifier is attached to the head of described at least one protocol Data Unit.

27. method according to claim 15, wherein said determining step comprises:

Read the point-to-multipoint service identifier of described distribution; And

By reading described map information, determine coupling point-to-multipoint service corresponding to the point-to-multipoint service identifier of described distribution,

Want the service that receives if the service of wherein described coupling point-to-multipoint is described portable terminal, then handle described at least one protocol Data Unit;

If being described portable terminal, the service of wherein described coupling point-to-multipoint do not want the service that receives then to abandon described at least one protocol Data Unit.