CN101137232A - Enhanced multi-user packets with extended MAC index space for wireless communications - Google Patents

Abstract

The present invention provides methods for identifying the target mobile stations for data transmission in a wireless communication network. An enhanced Multi-User Packet format that supports both the legacy MAC Index and the new extended MAC Index in the same packet is described. The length of extended MAC Index can be variable.

Description

Be used for the enhanced multi-user grouping with extended MAC index space of radio communication

Technical field

The present invention relates to a kind of cordless communication network that is used for discerning the technology of travelling carriage that comprises by the base station of transmission of data packets.

Background technology

Wireless communication system uses the network of base station to come to communicate with the wireless device of registration service in this system.Each base station and wireless device all are wireless sets, and it is used for transmitting and receiving the radio signal of modulating through the communication information (wherein can comprise the data such as speech data and other data contents).In wireless network, come for the geographic area provides service by the geographic area being divided into a plurality of radio units, wherein, each radio unit further can be divided into two or more unit areas.In theory, the base station is positioned at the center of each unit of its covering, and by forward link or downlink radio signal information is sent to travelling carriage.Mobile radio station is sent to its serving BS by reverse link or uplink link radio signal with information.Can modulate the radio signal between base station and the travelling carriage, so that it comprises voice or data traffic signals or both.

Fig. 1 shows an example that is used for providing to the wireless device that is positioned at geographic area 100 or travelling carriage the wireless communication system of wireless service.Geographic area 100 is divided into a plurality of radio units 110 (conceptually being represented by cellular hexagon).But in fact, each unit can have irregular shape, and this depends on the landform that comprises around the unit and the various factors of traffic carrying capacity.Can further each dividing elements be become two or more zones.1xEV-DO is a kind of special wireless communication system that designs for high-speed packet data service, it be also referred to as high data rate (High Data Rate, HDR) or High Rate Packet Data (High Rate Packet Data, HRPD) system.1xEV-DO has been standardized as the C.S0024 among international standard group third generation partner program 2 (3GPP2), and has been published as the IS-856 revised edition O and the revised edition A standard of the U.S..

In the 1xEV-DO system, travelling carriage 132,134 (being also referred to as access terminal (AT)) data rate control (Data Rate Control, DRC) determine in the message and the report forward link on the data rate that can support.Base station 120 (be also referred to as accesses network or (AN)) is chosen in the physical layer packet that particular time-slot is used for forward link transmissions based on the DRC message that receives from different travelling carriages.Can give the time slot that physical layer packet is used to transmit more than.In this case, insert a plurality of transmission time slots that time slots are separated physical layer packet by three, during this inserts time slot, can transmit a plurality of time slots of other physical layer packet.If transmitting before all have distributed time slot, on the reverse link ack channel, received affirmative acknowledgement (ACK), then no longer transmit the remaining time slot that do not transmit, and the next one can have been distributed time slot to be used as first time slot of new physical layer packet transmission.With this technology be called mix automatic repeat requests (Hybrid Automatic Repeat Request, HARQ).

In order to identify the target MS that forward data packet is pointed to, the base station was transmitted the lead code on the phase branch (I-branch) of complex signal earlier before the transmission forward data packet.And do not transmit signal on the orthogonal branches (Q-branch) of complex signal.Lead code comprises the repetition as the 32-chip many bi-orthogonal sequences in the IS-856 revised edition O standard, perhaps as the repetition of the 64-chip many bi-orthogonal sequences in the IS-856 revised edition A standard.32-chip many bi-orthogonal sequences according to 32-ary (unit) Walsh function and by turn (bit-by-bit) negate determine:

W _I/2 ³², wherein, i=0,2 ..., 62 (1)

Wherein, i=1,3 ..., 63 (2)

Wherein, i=0,1 ..., the 63rd, medium access control (MAC) index value,

It is the negate by turn of the 32-chip Walsh function of order (order) i.MAC Index is the number by the travelling carriage that is used for tag system of base station assigns.Some MAC Index values are used as the common value of all travelling carriages, are used to identify control channel, broadcasting or multi-user's transmitted in packets.64-chip many bi-orthogonal sequences according to the Walsh of 64-unit function its by turn negate determine:

W _I/2 ⁶⁴, wherein, i=0,2 ..., 1 26 (3)

Wherein, i=1,3 ..., 1 27 (4)

Wherein, i=0,1 ..., the 127th, MAC Index value,

It is the negate by turn of the 64-chip Walsh function of order i.Because the Walsh function can generate by following recursive procedure, so repeating of 32-chip many bi-orthogonal sequences is the subclass of 64-chip many bi-orthogonal sequences:

H ₁＝0， $H_2=\begin{array}{cc}0& 0\\ 0& 1\end{array},H_4=\begin{array}{cccc}0& 0& 0& 0\\ 0& 1& 0& 1\\ 0& 0& 1& 1\\ 0& 1& 1& 0\end{array},H_{2^N}=\begin{array}{cc}{H}_N& H_N\\ H_N& {\stackrel{-}{H}}_N\end{array},---\left(5\right)$

Wherein, N is 2 power,

Expression H _NThe binary system negate.Therefore, when traditional travelling carriage of the IS-856 revised edition O standard in the IS-856 revised edition A network was followed in the support of IS-856 revised edition A standard, IS-856 revised edition A standard made and doubles for MAC Index number.The length of lead code depends on data packet format, can change between 1024 chips at 64 chips.

IS-856 revised edition A standard provide a kind of be used for supporting such as the voice Internet protocol (Voice over Internet Protocol, VoIP) in real time or near multi-user's grouping of real time business (Multi-User Packet, MUP).MUP is a kind of one or more packets that are addressed to the security layer packet of different mobile stations that have.The lead code with public MAC Index value that the base station will be used for each multi-user's grouping is sent to all travelling carriages of supporting multi-user's grouping.Each MAC Index value that is used for the target MS of multi-user's grouping is embedded in the mac header of each MAC layer grouping.Travelling carriage is decoded to multi-user grouping, with one of target MS of determining whether it is multi-user's specified in packets.In IS-856 revised edition A system, can support 128 MAC Index values at most.

Summary of the invention

In the application's specification, a kind of multi-user MAC layer packet format of supporting to have the MAC Index space of expansion described, to be provided for identifying the method for a plurality of travelling carriages in the individual unit zone by single base station.The realization of this method can be so that single base station can be for providing service more than 128 travelling carriages in the individual unit zone, and, the realization of this method also with IS-856 tradition Mac index value compatibility, so can in wireless system, use traditional travelling carriage.

For example, can provide broadband service along with 1xEV-DO develops into, particularly along with development based on the solution of multicarrier, wireless communication system may need to support to be used for each zone more than 128 travelling carriages.In order further to set forth this situation, when at least some travelling carriages (such as, transmit and receive the travelling carriage of VoIP data) during with relative less bandwidth work, the base station can provide service for a large amount of travelling carriages in VoIP or other bandwidth of base station in using.The current upper limit of 128 travelling carriages being supported simultaneously by the single base station in the unit area may also be not enough to satisfy these and use, can use this method with the capacity extensions of the base station in each zone to 128 the number that surpasses under the IS-856 revised edition A.In addition, this method can also be used to supporting the MAC Index space of variable-length so that MAC Index space further expand in the future can with the travelling carriage compatibility of following this method.

In the illustrative methods of multi-user MAC layer grouping (MUP) form in the MAC Index space of supporting to have expansion, with known, the traditional travelling carriage the unknown of new travelling carriage but the redirected MAC Index that does not conflict with any MAC Index that distributes to traditional travelling carriage be placed in the first grouping information field among the MUP.First length field is placed on after first grouping information, to show the total length of all mac header relevant fields of being used for all new travelling carriages (such as, grouping information field (Pkt Info), length field and optional MAC Index extended field).If have the grouping information field and the length field that are used for all traditional travelling carriages of dispatching among the current MUP, then they be inserted into after first length field.If exist at least one to be used for last length field of traditional travelling carriage, mac header delimiter field that then can the value of being assigned with " 00000000 " is inserted into after this last length field that is used for traditional travelling carriage, otherwise it is inserted into after first length field.To be used in the Pkt Info field of all new travelling carriages that current MUP dispatches and length field and after optionally MAC Index expansion is inserted into the mac header delimiter and before the security packet.If there is the security layer packet be used for all traditional travelling carriages of dispatching at current MUP, the security layer packet that then will be used for all traditional travelling carriages is placed on the first of MAC layer payload field, is useful on the security layer packet of all new travelling carriages of dispatching in current MUP thereafter.Optional PAD field can be placed on after the security layer packet.MAC layer telegram end can be placed on end, to show the end of transmission.

Can realize a plurality of advantages by some embodiments of the present invention.An advantage is, (for example) support the variable-length of the MAC Index be used to expand, thereby the realization of the MAC Index of process expansion can be satisfied the demand, and can not produce unnecessary extra order, allow simultaneously in the future to come further expanding to MAC Index space in the understandable mode of the travelling carriage of following this method.Another advantage is that (for example) kept eight bit byte orientation (octet-orientated) structure that is used for multi-user's packet format, thereby has simplified hardware and/or software realization.

In this respect, the highest significant position of MAC Index that can be by will being unsuitable for eight bit byte is placed in the MAC Index trailer field in the MAC Index extended field, and, use this method to make the length of a MAC Index expansion integer eight bit byte by (if desired) interpolation mac header PAD field.Can realize one group of interpretative rule in conjunction with MAC Index trailer field, represent what and they are relevant with which new MAC Index and how to determine and their coupling so that travelling carriage is understood MAC Index telegram end.

By traditional travelling carriage and new travelling carriage are among the same MUP, can keep backwards-compatible in, realizes above-mentioned feature and advantage with other.

These and other embodiment, change and modification will be described in accompanying drawing, detail specifications and claims in more detail.

Description of drawings

Fig. 1 is the schematic diagram of the general honeycomb in the wireless communication system;

Fig. 2 is the schematic diagram that the form of the multi-user MAC layer grouping in the existing 1xEV-DO system is shown;

Fig. 3 is the schematic diagram of enhancing form that the multi-user MAC layer grouping in the MAC Index space of supporting variable-length is shown;

Fig. 4 A show when maximum MAC Index greater than 255 the time, comprise new MAC Index trailer field and optionally fill the example of the MAC Index extended field of field;

Fig. 4 B show when maximum MAC Index greater than 255 the time, comprise new MAC Index trailer field and optionally fill another example of the MAC Index extended field of field;

Fig. 4 C show when maximum MAC Index greater than 255 the time, comprise new MAC Index trailer field and optionally fill the another example of the MAC Index extended field of field; And

Fig. 4 D show when maximum MAC Index greater than 255 the time, comprise new MAC Index trailer field and optionally fill the example again of the MAC Index extended field of field.

Embodiment

Fig. 2 shows an example of the forward link multi-user MAC layer grouping in the 1x-EV-DO system, and wherein, this grouping can be supported 128 travelling carriages that reach in the unit area of the base station IS-856 revised edition A under.This grouping is by a part that has been assigned with the forward link sequence that MAC Index value receives with the one or more travelling carriages as its identifier.For example, can be embodied as the distribution that different travelling carriages carries out MAC Index by using the traffic channel assignment message (Traffic Channel Assignment Message) under the IS-856.During grouping in receiving Fig. 2, each travelling carriage all begins to search for the MAC Index value of being distributed and begins to search for and the relevant related data of MAC Index value of being distributed.

As described, this multi-user MAC layer grouping comprises the MAC layer payload sequence 210 of n security layer packet, and wherein, n is the integer between 1 to 8.MAC layer preamble sequence comprises n grouping information field (PacketInfo) 220 and n length field 230.N grouping information field 220 comprises form bit 240 and n security layer packet seven bit mac Index250 with the travelling carriage that is addressed to.N length field 230 shows the length of n security layer packet in the MAC layer payload 210 with a plurality of eight bit bytes.If the size of MAC layer grouping surpasses the one or more eight bit bytes of summation of the length of security layer packet, mac header and MAC telegram end 270, then comprise mac header delimiter (HeaderDelimiter) 260.If comprise mac header delimiter 260, then among the embodiment under IS-856 revised edition A mac header delimiter 260 is set to " 00000000 ".If the size of MAC layer grouping has surpassed the summation of the length of n security layer packet, mac header, mac header delimiter 260 (if comprising) and MAC telegram end 270, then comprise PAD position 280.If comprise PAD position 280, then PAD position 280 all is changed to " 0 ".The lead code that is used for multi-user's grouping is used the known public MAC Index value of all travelling carriages.

Has the limited capacity that a plurality of travelling carriages in each unit area in the base station simultaneously provide service based on the wireless system of the forward link data form among Fig. 2.Can be with the data format modification among Fig. 2 for comprising added field, to expand the capacity of this system.In one embodiment, a kind of method of wireless communication that is used for be can use, mac header sequence and the MAC payload sequence of following this mac header sequence provided in the forward data packet in medium access control (MAC) layer that generates by the base station.Wherein, the mac header sequence comprises the mobile station identification information that is used to identify one or more target MSs, and MAC payload sequence comprises the packet of pointing to one or more target MSs.In the mac header sequence, comprise one or more MAC Index fields, these one or more MACIndex fields are assigned respectively and are used to identify a MAX index value of corresponding travelling carriage to maximum MAC Index value; Also comprise one or more the 2nd MAC Index fields, these one or more the 2nd MAC Index fields are assigned the 2nd MAC Index value greater than maximum MAC Index value respectively.The mac header sequence is prior to the position of a MACIndex field and the 2nd MAC Index field in time, also comprise and be redirected the MACIndex field, be used to indicate target MS when it is assigned MAC Index value less than maximum MAC Index value, to read one or more MAC Index fields, and when being assigned MAC Index value greater than maximum MAC Index value, it reads one or more the 2nd MAC Index fields, wherein, be redirected the MAX index value and be not used in the some travelling carriages of sign.

Fig. 3 shows the example according to enhanced multi-user grouping (MUP) form in the MAC Index space of the support variable-length of an embodiment.When the MACIndex space that exist to use increases and when having at least one new travelling carriage greater than 127 MAC Index, use this enhancement mode MUP form.In same enhancement mode MUP, needn't have a traditional travelling carriage at least.When not having new travelling carriage among the MUP, can use traditional MUP form.

Data format among Fig. 3 can be used for realizing the method that strengthens, and supports multi-user MAC layer packet format.In one embodiment, this method comprises: known, the traditional travelling carriage of new travelling carriage is unknown but redirected MAC Index that do not conflict with any MACIndex that distributes to traditional travelling carriage is placed in the first grouping information field 302 among the MUP; And place first length fields 308 in the first grouping information field 302 back, to show the total length of all mac header relevant fields of being used for all new travelling carriages (such as, Pkt Info332, length 338 and optional mac header PAD342); To be used for after the grouping information field of all traditional travelling carriages that current MUP dispatches and length field (if existence) are inserted into first length field 308; To be inserted into for the mac header delimiter field 322 of " 00000000 " be used for traditional travelling carriage last length field (if having at least one) afterwards, otherwise be inserted into after first length field 308; To be used in the Pkt info field 332 of all new travelling carriages that current MUP dispatches and length field 338 and after optionally mac header PAD 342 is inserted into mac header delimiter 322 and before the security packet 352; To be used for being placed in the first of MAC layer payload field, follow the security layer packet that is useful on all new travelling carriages of in current MUP, dispatching thereafter in the security layer packet (if any) of all traditional travelling carriages that current MUP dispatches; Insert PAD field 392 alternatively; And at end placement MAC layer telegram end 396.

In the example in Fig. 3, the grouping of enhanced multi-user MAC layer comprises: (n+m) individual Pkt (grouping) Info field 302,312,332; And (n+m) individual length field 308,338; Mac header delimiter field 322; Optional MAC Index Ext (expansion) field 342; (n+m-1) the MAC layer payload field 352,358,362,368 of individual security layer packet; Optional MAC layer PAD field 392; And MAC layer trailer field 396.Wherein, n and m are positive integers.

The one pkt Info field 302 comprises that 1 keeps 304 and 7 the redirected MACIndex306 in position.Being redirected MAC Index 306 is one of known 7 traditional long MAC Index of all new travelling carriages.It for known to traditional travelling carriage and not be that any MAC Index that traditional travelling carriage distributes conflicts by the base station.Can be set to " 0 " or " 1 " with keeping position 304.In some implementations, can regard redirected MAC Index jointly as with keeping position 304 and redirected MAC Index306.In this case, it is among traditional 7 long MAC Index one that seven least significant bits (LSB) that are redirected MAC Index also need, wherein, the long MAC Index of these traditional 7 is known, the traditional travelling carriage the unknown of all new travelling carriages and is not that any MAC Index that traditional travelling carriage distributes conflicts with the base station.

Length field L1 308 after the one Pkt Info302 with a plurality of eight bit bytes show after the mac header delimiter 322, the length of field before the security layer packet 352, and comprise all the mac header relevant fields (for example, Pkt Info 332, length 338 and optionally MAC Index expansion 342) that are used for all new travelling carriages that current MUP dispatches.

In this embodiment, traditional travelling carriage will be redirected MAC Index 306 as be used for traditional travelling carriage once be not the MAC Index that is used for himself.Therefore, this tradition travelling carriage L1 field that eight bit byte is long is as the payload of the security packet that is used for this imaginary travelling carriage, wherein, the L1 field that this eight bit byte is long is positioned at after the mac header delimiter 322 and is positioned at before the security layer packet 352, and comprises all mac header relevant fields that are used for all new travelling carriages of dispatching at current MUP.

New travelling carriage can be discerned the directed MACIndex of certain heavy among the Pkt Info 302, and can after detecting mac header delimiter field 322, recognize, there is the long L1 field of eight bit byte that comprises all the mac header relevant fields (for example, pkt Info 332, length 338 and optionally MAC Index expansion 342) that are used at least one new travelling carriage.Therefore, new travelling carriage will be expanded among 342 and search for its oneself MAC Index after the mac header delimiter 322 at pkt Info field (if existence) and MAC Index.In order to support a large amount of MAC Index (for example, 1024 MAC Index), new MAC Index336 will for 10 long.New length field 338 can also be longer than 8, with the bigger security packet of a plurality of 8 bit group sizes of showing the corresponding security packet that is used for the MAC payload.Therefore, when the total length of m Pkt Info field that is used for the new travelling carriage of m and length field is not the individual 8 bit groups of integer, add to mac header PAD 342 after last length field of new travelling carriage and the beginning of security packet before so that the total length of m pkt Info field and length field and mac header PAD equals next round-up (round-up) integer.Mac header PAD will and have length less than 8 for full zero-bit.

If have the actual payload of (n-1) the individual security layer packet 352,358 that is used for traditional travelling carriage, then place it in the first of MAC layer payload.And m security packet 362,368 be placed in the second portion of MAC layer payload.The tradition travelling carriage will be ignored the second portion of MAC layer payload.New travelling carriage will calculate the beginning of its oneself security packet by the length field that decoding is used for the length field (if existence) of all traditional travelling carriages of dispatching at current MUP and is used for arbitrarily new travelling carriage (its MAC Index morning occurs at current MUP).

Add MAC trailer field 396 into " 00 " at the end of MAC layer grouping.If from a pkt Info302 to the end the length overall of security layer packet 368 deduct 2 less than MAC grouping size, then PAD field 392 is inserted between last security layer packet 368 and the MAC telegram end 396.It is complete zero that this PAD field is set to, and its length is set to MAC grouping size and deducts and deduct the length after the length overall of security packet 368 to the end from a pkt Info302 after 2 again.

It is long that each pkt Info field 302,312,332 is an eight bit byte (8).Each length field 308,338 also is that an eight bit byte is long.First of pkt Info332 who is used for new travelling carriage is form bit 334.All the other 7 are named as new MAC Index336.

If system's support is then omitted MAC Index extended field 342 less than 256 maximum MAC Index.The maximum MAC Index that Fig. 4 A shows in system's support is greater than an embodiment of the detailed structure of 255 o'clock MAC Index extended field 342.With reference to Fig. 4 A, MAC Index expansion 342 comprises: be used for m new MAC Index trailer field 402,404 of m new travelling carriage dispatching at current MUP, its back is optional mac header PAD field 406.First new MAC Index telegram end 402 is relevant with (n+1) individual Pkt Info332, and (n+1) individual Pkt Info332 is relevant with (n+1) individual Pkt (security layer packet) 362.The new MAC Index telegram end 404 of m is relevant with (n+m) individual Pkt Info, and the individual pkt of (n+m) individual pkt Info and (n+m) 368 is relevant.If the length overall of m new MAC Index telegram end is an integer eight bit byte, then omit mac header PAD.Otherwise, after last new MAC Index telegram end 404, add mac header PAD406, so that the length overall of individual new MAC Index telegram end of m and mac header PAD406 equals the integral multiple of the eight bit byte of next round-up.If added mac header PAD406, then it is changed to entirely " 0 " position and its length less than 8.

In the embodiment shown in Fig. 4 A, m the identical order appearance of order that new MAC Index telegram end appears at the mac header front portion with relative pkt Info field.Shown in Fig. 4 B, in another embodiment, m the opposite order appearance of order that new MAC Index telegram end 412,414 appears at the mac header front portion with relative pkt Info field.And mac header PAD416 (if desired) is the decline of MAC Index extended field 342.In another embodiment, shown in Fig. 4 C, m the identical order appearance of order that new MAC Index telegram end 424,426 appears at the mac header front portion with relative pkt Info field, if but had mac header PAD field 422, they would all be followed after mac header PAD field 422.In another embodiment, shown in Fig. 4 D, m the opposite order appearance of order that new MAC Index telegram end 434,436 appears at the mac header front portion with relative pkt Info field, if but had mac header PAD field 432, they would all be followed after mac header PAD field 432.

To in the part of back, describe new MAC Index fields 336 of 7 of how to use in the optional MAC Index extended field 342 and new MAC Index trailer field and support the MAC Index space of variable-length.But the traffic channel assignment message that the length information in extended MAC Index space is sent to travelling carriage is described at first.

As shown in table 1 below, traffic channel assignment message comprises: at least one is used to show 8 long message id fields of type of message; Be used to show 8 long message sequence field of message SN (MessageID); Be used to show 2 long MAC Index counting (MACIndexCount) fields (as shown in table 2 below) of extended MAC Index space length; With and length equal the MAC Index of distribution of the length in the extended MAC Index space that shows by MAC Index counting (MACIndexCount) (as shown in table 2).

Table 1

Field	Length (position)
		MessageID MessageSequence [...] MACIndexCount MACIndex	882 MAC Index length (MACIndexLength)

Table 2

MACIndexCount	MACIndexLength (position)
		00 01 10 11	8 9 10 11

If expecting in an embodiment has more selection to the length in MAC Index space of expansion, the MACIndexCount field in table 1 and the table 2 can be adjusted into 3, the highlyest can be adjusted to 8.

As mentioned above, via the traffic channel assignment message sink behind the length information in extended MAC Index space, new travelling carriage will be according to table 3 and following to a description that embodiment did after being correctly decoded the MUP physical layer packet, searches for its oneself the MAC Index that is distributed.

If the length in MAC Index space is 8, then when having omitted whole M ACIndex and expand 342, will not have new MAC Index telegram end.Among the new MAC Index336 7 will show poor between the MAC Index and 128 of distribution.Therefore, equal 128 values that add in the new MAC Index field, then set up coupling if distribute to the MAC Index of new travelling carriage.In this structure, system can support that maximum MAC Index is 255.

Table 3

MAC Index length (position)	Maximum MAC Index	New MAC Index	New MAC Index telegram end
				8	255	MAC Index-128	No
9	383	The B of (MAC Index-128) 6B 5B 4B 3B 2B 1B 0	The B of (MAC Index-128) 7
				10	639	The B of (MAC Index-128) 6B 5B 4B 3B 2B 1B 0	The B of (MAC Index-128) 8 B 7
11	1151	The B of (MAC Index-128) 6B 5B 4B 3B 2B 1B 0	The B of (MAC Index-128) 9B 8B 7

If the length in MAC Index space is 9, then new MAC Index telegram end 402,404,412,414,424,426,434,436 will for 1 long and its will show highest significant position (MSB) B of the difference between the MAC Index and 128 of distribution ₇Among the new MACIndex336 seven will show seven least significant bits (LSB) B of the difference between the MAC Index and 128 of distribution ₆B ₅B ₄B ₃B ₂B ₁B ₀Therefore, equal 128 and add the B that in new MAC Index and relevant new MACIndex trailer field thereof, obtains if distribute to the MAC Index of new travelling carriage ₇B ₆B ₅B ₄B ₃B ₂B ₁B ₀Value, then set up coupling.In this structure, system can support that maximum MAC Index is 383.

If the length in MAC Index space is 10, then new MAC Index telegram end 402,404,412,414,424,426,434,436 will for 2 long and its will show 2 highest significant positions (MSB) B of the difference between the MAC Index and 128 of distribution ₈B ₇Among the new MAC Index336 seven will show seven least significant bits (LSB) B of the difference between the MAC Index and 128 of distribution ₆B ₅B ₄B ₃B ₂B ₁B ₀Therefore, equal 128 and add the B that in new MAC Index field and relevant new MAC Index trailer field thereof, obtains if distribute to the MAC Index of new travelling carriage ₈B ₇B ₆B ₅B ₄B ₃B ₂B ₁B ₀Value, then set up coupling.In this structure, system can support that maximum MAC Index is 639.

If the length in MAC Index space is 11, then new MAC Index telegram end 402,404,412,414,424,426,434,436 will for 3 long and its will show 3 highest significant positions (MSB) B of the difference between the MAC Index and 128 of distribution ₉B ₈B ₇Among the new MAC Index 336 seven will show seven least significant bits (LSB) B of the difference between the MAC Index and 128 of distribution ₆B ₅B ₄B ₃B ₂B ₁B ₀Therefore, equal 128 and add the B that in new MAC Index and relevant new MAC Index trailer field thereof, obtains if distribute to the MAC Index of new travelling carriage ₉B ₈B ₇B ₆B ₅B ₄B ₃B ₂B ₁B ₀Value, then set up coupling.In this structure, system can support that maximum MAC Index is 1151.

According to another embodiment, new travelling carriage will be distributed to its MAC Index according to table 4 and following description search.

Table 4

MAC Index length (position)

Maximum MAC Index

New MAC Index

New MAC Index telegram end

8	255	MAC Index-128	Do not have
				9	511	The B of MAC Index 6B 5B 4B 3B 2B 1B 0	The B of MAC Index 8B 7
10	1023	The B of MAC Index 6B 5B 4B 3B 2B 1B 0	The B of MAC Index 9B 8B 7
				11	2047	The B of MAC Index 6B 5B 4B 3B 2B 1B 0	The B of MAC Index 10B 9B 8B 7

If the length in MAC Index space is 8, then 8 situations describing in the table 3 are identical.

If the length in MAC Index space is 9, then new MAC Index telegram end 402,404,412,414,424,426,434,436 will for 2 long and its will show 2 highest significant positions (MSB) B of the MAC Index of distribution ₈B ₇Seven seven least significant bits (LSB) B that will show the MAC Index of distribution among the new MAC Index336 ₆B ₅B ₄B ₃B ₂B ₁B ₀Therefore, equal the B that in new MAC Index field and relevant new MAC Index trailer field thereof, obtains if distribute to the MAC Index of new travelling carriage ₈B ₇B ₆B ₅B ₄B ₃B ₂B ₁B ₀Value, then set up coupling.In this structure, the maximum MAC Index that system can support is 511.

If the length in MAC Index space is 10, then new MAC Index telegram end 402,404,412,414,424,426,434,436 will for 3 long and its will show 3 highest significant positions (MSB) B of the MAC Index of distribution ₉B ₈B ₇Seven seven least significant bits (LSB) B that will show the MAC Index of distribution among the new MAC Index336 ₆B ₅B ₄B ₃B ₂B ₁B ₀Therefore, equal the B that in new MAC Index field and relevant new MAC Index trailer field thereof, obtains if distribute to the MAC Index of new travelling carriage ₉B ₈B ₇B ₆B ₅B ₄B ₃B ₂B ₁B ₀Value, then set up coupling.In this structure, the maximum MAC Index value that system can support is 1023.

If the length in MAC Index space is 11, then new MAC Index telegram end 402,404,412,414,424,426,434,436 will for 4 long and its will show 4 highest significant positions (MSB) B of the MAC Index of distribution ₁₀B ₉B ₈B ₇Seven seven least significant bits (LSB) B that will show the MAC Index of distribution among the new MACIndex336 ₆B ₅B ₄B ₃B ₂B ₁B ₀Therefore, equal the B that in new MAC Index field and relevant new MAC Index trailer field thereof, obtains if distribute to the MAC Index of new travelling carriage ₁₀B ₉B ₈B ₇B ₆B ₅B ₄B ₃B ₂B ₁B ₀Value, then set up coupling.In this structure, the maximum MAC Index that system can support is 2047.

Embodiment and the functional computing with other that have disclosed described among the present invention can realize at Fundamental Digital Circuit or in computer software, firmware or hardware (comprising the structure that discloses in this specification and structural equivalent thereof) or the one or more combination in them.Disclosed and other embodiment can be used as one or more computer programs (that is, data processing equipment carry out (or control data treatment facility operation) one or more modules of calculation of coding machine program command on computer-readable medium) and realizes.Computer-readable medium can be machine-readable storage device, machine readable storage substrate (storage substrate), storage device, the combinations of substances of the machine-readable transmitting signal of influence or the one or more combination in them.Term " data processing equipment " comprises all devices, device and the machine (for example, comprising programmable processor, computer or multiprocessor or computer) that is used for deal with data.Except hardware, this equipment can also comprise code (for example, constituting the code of processor firmware), protocol stack, data base management system, operating system or the one or more combination in them that is used to create the execution environment that is used for described computer program.The signal of propagating is the artificial signal that generates (for example, electricity, light or electromagnetic signal that machine generates), generates these signals and comes information is encoded to send to suitable receiver apparatus.

Computer program (being also referred to as program, software, software application, script or code) can be in any form programming language (comprising compiling or interpretative code) write, or can with various forms (comprise as independent program as module, element, subprogram or be applicable to other unit of computing environment) use.Computer program needn't be corresponding to the file in the file system.Can in the part of the file that is used to preserve other programs or data (for example, be stored in the marking language document one or more scripts), be specifically designed in the single file of described in question program or stored program in a plurality of coordinated files (storing the file of one or more modules, subprogram or partial code).Computer program can be used for operating in and be positioned at a website or cross over that a plurality of websites distribute and by on the interconnective computer of communication network or many computers.

Processing described in this specification and logic flow can be carried out by one or more programmable processors, wherein, this programmable processor is used to carry out one or more computer programs, with by the input data being carried out computing and generated output carry out multiple function.These are handled and the equipment of the logical circuit that logic flow can also be by can be implemented as special purpose is realized, for example, realize by FPGA (field programmable gate array) or ASIC (application-specific IC).

The processor that is suitable for computer program comprises the microprocessor of general and special purpose, and any one or a plurality of processor of any type digital computer.Usually, processor will receive from read-only memory or random access memory or from both instruction and data.The main element of computer is processor that is used to execute instruction and the one or more storage devices that are used for store instruction and data.

Although this specification comprises a plurality of specific embodiments, these embodiment are not limited to the scope of any invention or claim, but conduct is to the description of the concrete feature of specific embodiment.Some feature of describing in the explanation in the context of each embodiment can also realize in being combined in single embodiment.On the contrary, the various features of describing in the context of single embodiment also can realize in a plurality of embodiment respectively or realize in any suitable sub-portfolio.In addition, although is what work can be in some combination even initial claim with above-mentioned a plurality of feature descriptions, but in some cases, can from desired combination, delete one or more features, and can be with desired in conjunction with the distortion of pointing to sub-portfolio or sub-portfolio.

Similarly, although described operation with particular order in the accompanying drawings, should not be considered as must with shown in order or carry out these operations with continuous order, or carry out the operation shown in all, to reach desirable effect.In some cases, multi-tasking and parallel processing may be favourable.In addition, the separation of the various systems in the foregoing description should not be understood to be in all needs this separation among all embodiment, and should not be understood that described program element and system can be integrated in the single software product usually together, or be packaged in a plurality of software products.

Therefore, specific embodiment is described.Other embodiment is included in the scope of claims.

Claims (10)

1. one kind is used for method of wireless communication, comprising:

Provide mac header sequence and the MAC sequence of message of following after described mac header sequence in the forward data packet in medium access control (MAC) layer that generates by the base station, wherein, described mac header sequence comprises the mobile station identification information that is used to identify one or more target MSs, and described MAC payload sequence comprises the packet that transmits to described one or more target MSs; In described mac header sequence, comprise one or more MACIndex fields and one or more the 2nd MAC Index field, each MAC Index field is endowed a MAC Index value that is not more than maximum MAC Index value, and each the 2nd MAC Index field is endowed the 2nd MAC Index value greater than maximum MAC Index value; And

Described mac header sequence, comprise prior to the position of a described MACIndex field and described the 2nd MAC Index field and be redirected MAC Index field in time, when being assigned the MAC Index value less than described maximum MACIndex value at target MS, indicate described target MS to read a described one or more MAC Index field; And when described target MS is assigned MAC Index value greater than described maximum MAC Index value, indicate described target MS to read described one or more the 2nd MAC Index field, wherein, described redirected MAX index value is not used in the some travelling carriages of sign.

2. method according to claim 1 further comprises:

One of 128 MACIndex values distributing to the travelling carriage under the IS-856 revised edition A are appointed as the value of described redirected MAC Index field; And one of all the other 127 the MAC Index values that will distribute to described travelling carriage are used for each MAC Index field.

3. method according to claim 1 further comprises:

When certain MACIndex value of being endowed on target MS certain field in described one or more MAC Index fields less than maximum MAC Index value, described target MS as a MAX index value that is used for another travelling carriage, and continues to read subsequently a MAC Index field with the value in the described redirected MAX index field; And

When certain MACIndex value of being endowed on target MS certain field in described one or more the 2nd MAC Index fields greater than maximum MAC Index value, described target MS is skipped a described one or more MACIndex field, to read described one or more the 2nd MAC Index field.

4. method according to claim 1 further comprises:

In the mac header sequence, provide the telegram end of one the 2nd MAC Index, with store M ACIndex number high significance bit for each field in one or more the 2nd MAC Index fields; And

Use the low order of corresponding the 2nd MAC Index field store described MAC Index number.

5. method according to claim 1 further comprises:

The telegram end of one the 2nd MAC Index is provided for each field in one or more the 2nd MAC Index fields in the mac header sequence, with store described MAC Index number and maximum MAC Index value between the high significance bit of difference.

6. wireless communication system comprises:

A plurality of base stations, each described base station all can be operated and are used for:

Provide mac header sequence and the MAC payload sequence of following after described mac header sequence in the forward data packet in medium access control (MAC) layer that generates by the base station, wherein, described mac header sequence comprises the mobile station identification information that is used to identify one or more target MSs, and described MAC payload sequence comprises the packet that sends to described one or more target MSs; In described mac header sequence, comprise one or more MAC Index fields and one or more the 2nd MAC Index field, each MACIndex field is endowed a MAC Index value that is not more than maximum MAC Index value, and each the 2nd MAC Index field is endowed the 2nd MAC Index value greater than maximum MAC Index value; And

In described mac header sequence, comprise prior to the position of a described MACIndex field and described the 2nd MAC Index field and be redirected MAC Index field in time, when being assigned the MAC Index value less than described maximum MACIndex value at target MS, indicate described target MS to read a described one or more MAC Index field; And when described target MS is assigned MAC Index value greater than described maximum MAC Index value, indicate described target MS to read described one or more the 2nd MAC Index field, wherein, described redirected MAX index value is not used in the some travelling carriages of sign.

7. wireless communication system according to claim 6 is characterized in that:

The value of described redirected MAC Index field is appointed as one of 128 MAC Index values by travelling carriage under the IS-856 revised edition A; And

Described base station is used for each MAC Index field with one of all the other 127 MAC Index values.

8. wireless communication system according to claim 6 is characterized in that:

When certain MACIndex value of being endowed on target MS certain field in described one or more MAC Index fields less than maximum MAC Index value, described target MS as a MAX index value that is used for another travelling carriage, and continues to read subsequently a MAC Index field with the value in the described redirected MAX index field; And

When certain MACIndex value of being endowed on target MS certain field in described one or more the 2nd MAC Index fields greater than maximum MAC Index value, described target MS is skipped a described one or more MACIndex field, to read described one or more the 2nd MAC Index field.

9. wireless communication system according to claim 6, it is characterized in that: described base station provides the telegram end of one the 2nd MAC Index for each field in one or more the 2nd MACIndex fields in the mac header sequence, with the highest significant position of store M AC Index number; And

Corresponding described each the 2nd MAC Index field store is used in described base station

Described MAC Index number least significant bit.

10. wireless communication system according to claim 6 is characterized in that:

Described base station provides the telegram end of one the 2nd MAC Index for each field in one or more the 2nd MACIndex fields in the mac header sequence, to store the highest significant position of the difference between described MAC Index number.

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